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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java')
-rwxr-xr-xbundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java4568
1 files changed, 4568 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java
new file mode 100755
index 0000000000..e5e3c8ca44
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/graphics/GC.java
@@ -0,0 +1,4568 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2009 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.graphics;
+
+
+import org.eclipse.swt.internal.*;
+import org.eclipse.swt.internal.cairo.*;
+import org.eclipse.swt.internal.motif.*;
+import org.eclipse.swt.*;
+
+/**
+ * Class <code>GC</code> is where all of the drawing capabilities that are
+ * supported by SWT are located. Instances are used to draw on either an
+ * <code>Image</code>, a <code>Control</code>, or directly on a <code>Display</code>.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>LEFT_TO_RIGHT, RIGHT_TO_LEFT</dd>
+ * </dl>
+ *
+ * <p>
+ * The SWT drawing coordinate system is the two-dimensional space with the origin
+ * (0,0) at the top left corner of the drawing area and with (x,y) values increasing
+ * to the right and downward respectively.
+ * </p>
+ *
+ * <p>
+ * The result of drawing on an image that was created with an indexed
+ * palette using a color that is not in the palette is platform specific.
+ * Some platforms will match to the nearest color while other will draw
+ * the color itself. This happens because the allocated image might use
+ * a direct palette on platforms that do not support indexed palette.
+ * </p>
+ *
+ * <p>
+ * Application code must explicitly invoke the <code>GC.dispose()</code>
+ * method to release the operating system resources managed by each instance
+ * when those instances are no longer required. This is <em>particularly</em>
+ * important on Windows95 and Windows98 where the operating system has a limited
+ * number of device contexts available.
+ * </p>
+ *
+ * <p>
+ * Note: Only one of LEFT_TO_RIGHT and RIGHT_TO_LEFT may be specified.
+ * </p>
+ *
+ * @see org.eclipse.swt.events.PaintEvent
+ * @see <a href="http://www.eclipse.org/swt/snippets/#gc">GC snippets</a>
+ * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: GraphicsExample, PaintExample</a>
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ */
+public final class GC extends Resource {
+ /**
+ * the handle to the OS device context
+ * (Warning: This field is platform dependent)
+ * <p>
+ * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
+ * public API. It is marked public only so that it can be shared
+ * within the packages provided by SWT. It is not available on all
+ * platforms and should never be accessed from application code.
+ * </p>
+ */
+ public int handle;
+
+ Drawable drawable;
+ GCData data;
+
+ final static int FOREGROUND = 1 << 0;
+ final static int BACKGROUND = 1 << 1;
+ final static int FONT = 1 << 2;
+ final static int LINE_STYLE = 1 << 3;
+ final static int LINE_CAP = 1 << 4;
+ final static int LINE_JOIN = 1 << 5;
+ final static int LINE_WIDTH = 1 << 6;
+ final static int LINE_MITERLIMIT = 1 << 7;
+ final static int BACKGROUND_BG = 1 << 8;
+ final static int FOREGROUND_RGB = 1 << 9;
+ final static int BACKGROUND_RGB = 1 << 10;
+ final static int DRAW_OFFSET = 1 << 11;
+ final static int DRAW = FOREGROUND | LINE_WIDTH | LINE_STYLE | LINE_CAP | LINE_JOIN | LINE_MITERLIMIT | DRAW_OFFSET;
+ final static int FILL = BACKGROUND;
+
+ static final float[] LINE_DOT = new float[]{1, 1};
+ static final float[] LINE_DASH = new float[]{3, 1};
+ static final float[] LINE_DASHDOT = new float[]{3, 1, 1, 1};
+ static final float[] LINE_DASHDOTDOT = new float[]{3, 1, 1, 1, 1, 1};
+ static final float[] LINE_DOT_ZERO = new float[]{3, 3};
+ static final float[] LINE_DASH_ZERO = new float[]{18, 6};
+ static final float[] LINE_DASHDOT_ZERO = new float[]{9, 6, 3, 6};
+ static final float[] LINE_DASHDOTDOT_ZERO = new float[]{9, 3, 3, 3, 3, 3};
+
+GC() {
+}
+/**
+ * Constructs a new instance of this class which has been
+ * configured to draw on the specified drawable. Sets the
+ * foreground color, background color and font in the GC
+ * to match those in the drawable.
+ * <p>
+ * You must dispose the graphics context when it is no longer required.
+ * </p>
+ * @param drawable the drawable to draw on
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
+ * <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
+ * <li>ERROR_INVALID_ARGUMENT
+ * - if the drawable is an image that is not a bitmap or an icon
+ * - if the drawable is an image or printer that is already selected
+ * into another graphics context</li>
+ * </ul>
+ * @exception SWTError <ul>
+ * <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ * <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
+ */
+public GC(Drawable drawable) {
+ this(drawable, 0);
+}
+/**
+ * Constructs a new instance of this class which has been
+ * configured to draw on the specified drawable. Sets the
+ * foreground color, background color and font in the GC
+ * to match those in the drawable.
+ * <p>
+ * You must dispose the graphics context when it is no longer required.
+ * </p>
+ *
+ * @param drawable the drawable to draw on
+ * @param style the style of GC to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
+ * <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
+ * <li>ERROR_INVALID_ARGUMENT
+ * - if the drawable is an image that is not a bitmap or an icon
+ * - if the drawable is an image or printer that is already selected
+ * into another graphics context</li>
+ * </ul>
+ * @exception SWTError <ul>
+ * <li>ERROR_NO_HANDLES if a handle could not be obtained for GC creation</li>
+ * <li>ERROR_THREAD_INVALID_ACCESS if not called from the thread that created the drawable</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public GC(Drawable drawable, int style) {
+ if (drawable == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ GCData data = new GCData();
+ data.style = checkStyle(style);
+ int xGC = drawable.internal_new_GC(data);
+ Device device = data.device;
+ if (device == null) device = Device.getDevice();
+ if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ this.device = data.device = device;
+ init(drawable, data, xGC);
+ init();
+}
+static void addCairoString(int cairo, String string, float x, float y, Font font) {
+ byte[] buffer = Converter.wcsToMbcs(null, string, true);
+ GC.setCairoFont(cairo, font);
+ cairo_font_extents_t extents = new cairo_font_extents_t();
+ Cairo.cairo_font_extents(cairo, extents);
+ double baseline = y + extents.ascent;
+ Cairo.cairo_move_to(cairo, x, baseline);
+ Cairo.cairo_text_path(cairo, buffer);
+}
+static int checkStyle (int style) {
+ if ((style & SWT.LEFT_TO_RIGHT) != 0) style &= ~SWT.RIGHT_TO_LEFT;
+ return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
+}
+
+void checkGC (int mask) {
+ int state = data.state;
+ if ((state & mask) == mask) return;
+ state = (state ^ mask) & mask;
+ data.state |= mask;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ if ((state & (BACKGROUND | FOREGROUND)) != 0) {
+ XColor color;
+ Pattern pattern;
+ if ((state & FOREGROUND) != 0) {
+ color = data.foreground;
+ if ((data.state & FOREGROUND_RGB) == 0) {
+ OS.XQueryColor (data.display, data.colormap, color);
+ data.state |= FOREGROUND_RGB;
+ }
+ pattern = data.foregroundPattern;
+ data.state &= ~BACKGROUND;
+ } else {
+ color = data.background;
+ if ((data.state & BACKGROUND_RGB) == 0) {
+ OS.XQueryColor (data.display, data.colormap, color);
+ data.state |= BACKGROUND_RGB;
+ }
+ pattern = data.backgroundPattern;
+ data.state &= ~FOREGROUND;
+ }
+ if (pattern != null) {
+ Cairo.cairo_set_source(cairo, pattern.handle);
+ } else {
+ Cairo.cairo_set_source_rgba(cairo, (color.red & 0xFFFF) / (float)0xFFFF, (color.green & 0xFFFF) / (float)0xFFFF, (color.blue & 0xFFFF) / (float)0xFFFF, data.alpha / (float)0xFF);
+ }
+ }
+ if ((state & FONT) != 0) {
+ setCairoFont(cairo, data.font);
+ }
+ if ((state & LINE_CAP) != 0) {
+ int cap_style = 0;
+ switch (data.lineCap) {
+ case SWT.CAP_ROUND: cap_style = Cairo.CAIRO_LINE_CAP_ROUND; break;
+ case SWT.CAP_FLAT: cap_style = Cairo.CAIRO_LINE_CAP_BUTT; break;
+ case SWT.CAP_SQUARE: cap_style = Cairo.CAIRO_LINE_CAP_SQUARE; break;
+ }
+ Cairo.cairo_set_line_cap(cairo, cap_style);
+ }
+ if ((state & LINE_JOIN) != 0) {
+ int join_style = 0;
+ switch (data.lineJoin) {
+ case SWT.JOIN_MITER: join_style = Cairo.CAIRO_LINE_JOIN_MITER; break;
+ case SWT.JOIN_ROUND: join_style = Cairo.CAIRO_LINE_JOIN_ROUND; break;
+ case SWT.JOIN_BEVEL: join_style = Cairo.CAIRO_LINE_JOIN_BEVEL; break;
+ }
+ Cairo.cairo_set_line_join(cairo, join_style);
+ }
+ if ((state & LINE_WIDTH) != 0) {
+ Cairo.cairo_set_line_width(cairo, data.lineWidth == 0 ? 1 : data.lineWidth);
+ switch (data.lineStyle) {
+ case SWT.LINE_DOT:
+ case SWT.LINE_DASH:
+ case SWT.LINE_DASHDOT:
+ case SWT.LINE_DASHDOTDOT:
+ state |= LINE_STYLE;
+ }
+ }
+ if ((state & LINE_STYLE) != 0) {
+ float dashesOffset = 0;
+ float[] dashes = null;
+ float width = data.lineWidth;
+ switch (data.lineStyle) {
+ case SWT.LINE_SOLID: break;
+ case SWT.LINE_DASH: dashes = width != 0 ? LINE_DASH : LINE_DASH_ZERO; break;
+ case SWT.LINE_DOT: dashes = width != 0 ? LINE_DOT : LINE_DOT_ZERO; break;
+ case SWT.LINE_DASHDOT: dashes = width != 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break;
+ case SWT.LINE_DASHDOTDOT: dashes = width != 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break;
+ case SWT.LINE_CUSTOM: dashes = data.lineDashes; break;
+ }
+ if (dashes != null) {
+ dashesOffset = data.lineDashesOffset;
+ double[] cairoDashes = new double[dashes.length];
+ for (int i = 0; i < cairoDashes.length; i++) {
+ cairoDashes[i] = width == 0 || data.lineStyle == SWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width;
+ }
+ Cairo.cairo_set_dash(cairo, cairoDashes, cairoDashes.length, dashesOffset);
+ } else {
+ Cairo.cairo_set_dash(cairo, null, 0, 0);
+ }
+ }
+ if ((state & LINE_MITERLIMIT) != 0) {
+ Cairo.cairo_set_miter_limit(cairo, data.lineMiterLimit);
+ }
+ if ((state & DRAW_OFFSET) != 0) {
+ data.cairoXoffset = data.cairoYoffset = 0;
+ double[] matrix = new double[6];
+ Cairo.cairo_get_matrix(cairo, matrix);
+ double[] dx = new double[]{1};
+ double[] dy = new double[]{1};
+ Cairo.cairo_user_to_device_distance(cairo, dx, dy);
+ double scaling = dx[0];
+ if (scaling < 0) scaling = -scaling;
+ double strokeWidth = data.lineWidth * scaling;
+ if (strokeWidth == 0 || ((int)strokeWidth % 2) == 1) {
+ data.cairoXoffset = 0.5 / scaling;
+ }
+ scaling = dy[0];
+ if (scaling < 0) scaling = -scaling;
+ strokeWidth = data.lineWidth * scaling;
+ if (strokeWidth == 0 || ((int)strokeWidth % 2) == 1) {
+ data.cairoYoffset = 0.5 / scaling;
+ }
+ }
+ return;
+ }
+ int xDisplay = data.display;
+ if ((state & (BACKGROUND | FOREGROUND)) != 0) {
+ XColor foreground;
+ if ((state & FOREGROUND) != 0) {
+ foreground = data.foreground;
+ data.state &= ~BACKGROUND;
+ } else {
+ foreground = data.background;
+ data.state &= ~FOREGROUND;
+ }
+ OS.XSetForeground (xDisplay, handle, foreground.pixel);
+ }
+ if ((state & BACKGROUND_BG) != 0) {
+ XColor background = data.background;
+ OS.XSetBackground(xDisplay, handle, background.pixel);
+ }
+ if ((state & (LINE_CAP | LINE_JOIN | LINE_STYLE | LINE_WIDTH)) != 0) {
+ int cap_style = 0;
+ int join_style = 0;
+ int width = (int)data.lineWidth;
+ int line_style = 0;
+ float[] dashes = null;
+ switch (data.lineCap) {
+ case SWT.CAP_ROUND: cap_style = OS.CapRound; break;
+ case SWT.CAP_FLAT: cap_style = OS.CapButt; break;
+ case SWT.CAP_SQUARE: cap_style = OS.CapProjecting; break;
+ }
+ switch (data.lineJoin) {
+ case SWT.JOIN_ROUND: join_style = OS.JoinRound; break;
+ case SWT.JOIN_MITER: join_style = OS.JoinMiter; break;
+ case SWT.JOIN_BEVEL: join_style = OS.JoinBevel; break;
+ }
+ switch (data.lineStyle) {
+ case SWT.LINE_SOLID: break;
+ case SWT.LINE_DASH: dashes = width != 0 ? LINE_DASH : LINE_DASH_ZERO; break;
+ case SWT.LINE_DOT: dashes = width != 0 ? LINE_DOT : LINE_DOT_ZERO; break;
+ case SWT.LINE_DASHDOT: dashes = width != 0 ? LINE_DASHDOT : LINE_DASHDOT_ZERO; break;
+ case SWT.LINE_DASHDOTDOT: dashes = width != 0 ? LINE_DASHDOTDOT : LINE_DASHDOTDOT_ZERO; break;
+ case SWT.LINE_CUSTOM: dashes = data.lineDashes; break;
+ }
+ if (dashes != null) {
+ if ((state & LINE_STYLE) != 0) {
+ byte[] dash_list = new byte[dashes.length];
+ for (int i = 0; i < dash_list.length; i++) {
+ dash_list[i] = (byte)(width == 0 || data.lineStyle == SWT.LINE_CUSTOM ? dashes[i] : dashes[i] * width);
+ }
+ OS.XSetDashes(xDisplay, handle, 0, dash_list, dash_list.length);
+ }
+ line_style = OS.LineOnOffDash;
+ } else {
+ line_style = OS.LineSolid;
+ }
+ OS.XSetLineAttributes(xDisplay, handle, width, line_style, cap_style, join_style);
+ }
+}
+int convertRgn(int rgn, double[] matrix) {
+ int /*long*/ newRgn = OS.XCreateRegion();
+ //TODO - get rectangles from region instead of clip box
+ XRectangle rect = new XRectangle();
+ OS.XClipBox(rgn, rect);
+ short[] pointArray = new short[8];
+ double[] x = new double[1], y = new double[1];
+ x[0] = rect.x;
+ y[0] = rect.y;
+ Cairo.cairo_matrix_transform_point(matrix, x, y);
+ pointArray[0] = (short)x[0];
+ pointArray[1] = (short)y[0];
+ x[0] = rect.x + rect.width;
+ y[0] = rect.y;
+ Cairo.cairo_matrix_transform_point(matrix, x, y);
+ pointArray[2] = (short)Math.round(x[0]);
+ pointArray[3] = (short)y[0];
+ x[0] = rect.x + rect.width;
+ y[0] = rect.y + rect.height;
+ Cairo.cairo_matrix_transform_point(matrix, x, y);
+ pointArray[4] = (short)Math.round(x[0]);
+ pointArray[5] = (short)Math.round(y[0]);
+ x[0] = rect.x;
+ y[0] = rect.y + rect.height;
+ Cairo.cairo_matrix_transform_point(matrix, x, y);
+ pointArray[6] = (short)x[0];
+ pointArray[7] = (short)Math.round(y[0]);
+ int /*long*/ polyRgn = OS.XPolygonRegion(pointArray, pointArray.length / 2, OS.EvenOddRule);
+ OS.XUnionRegion(newRgn, polyRgn, newRgn);
+ OS.XDestroyRegion(polyRgn);
+ return newRgn;
+}
+/**
+ * Copies a rectangular area of the receiver at the source
+ * position onto the receiver at the destination position.
+ *
+ * @param srcX the x coordinate in the receiver of the area to be copied
+ * @param srcY the y coordinate in the receiver of the area to be copied
+ * @param width the width of the area to copy
+ * @param height the height of the area to copy
+ * @param destX the x coordinate in the receiver of the area to copy to
+ * @param destY the y coordinate in the receiver of the area to copy to
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void copyArea(int x, int y, int width, int height, int destX, int destY) {
+ copyArea(x, y, width, height, destX, destY, true);
+}
+/**
+ * Copies a rectangular area of the receiver at the source
+ * position onto the receiver at the destination position.
+ *
+ * @param srcX the x coordinate in the receiver of the area to be copied
+ * @param srcY the y coordinate in the receiver of the area to be copied
+ * @param width the width of the area to copy
+ * @param height the height of the area to copy
+ * @param destX the x coordinate in the receiver of the area to copy to
+ * @param destY the y coordinate in the receiver of the area to copy to
+ * @param paint if <code>true</code> paint events will be generated for old and obscured areas
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void copyArea(int x, int y, int width, int height, int destX, int destY, boolean paint) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (width <= 0 || height <= 0) return;
+ int deltaX = destX - x, deltaY = destY - y;
+ if (deltaX == 0 && deltaY == 0) return;
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ if (data.backgroundImage != null && paint) {
+ OS.XClearArea (xDisplay, xDrawable, x, y, width, height, true);
+ OS.XClearArea (xDisplay, xDrawable, destX, destY, width, height, true);
+ return;
+ }
+ if (data.image == null && paint) OS.XSetGraphicsExposures (xDisplay, handle, true);
+ OS.XCopyArea(xDisplay, xDrawable, xDrawable, handle, x, y, width, height, destX, destY);
+ if (data.image == null && paint) {
+ OS.XSetGraphicsExposures (xDisplay, handle, false);
+ boolean disjoint = (destX + width < x) || (x + width < destX) || (destY + height < y) || (y + height < destY);
+ if (disjoint) {
+ OS.XClearArea (xDisplay, xDrawable, x, y, width, height, true);
+ } else {
+ if (deltaX != 0) {
+ int newX = destX - deltaX;
+ if (deltaX < 0) newX = destX + width;
+ OS.XClearArea (xDisplay, xDrawable, newX, y, Math.abs (deltaX), height, true);
+ }
+ if (deltaY != 0) {
+ int newY = destY - deltaY;
+ if (deltaY < 0) newY = destY + height;
+ OS.XClearArea (xDisplay, xDrawable, x, newY, width, Math.abs (deltaY), true);
+ }
+ }
+ }
+}
+/**
+ * Copies a rectangular area of the receiver at the specified
+ * position into the image, which must be of type <code>SWT.BITMAP</code>.
+ *
+ * @param image the image to copy into
+ * @param x the x coordinate in the receiver of the area to be copied
+ * @param y the y coordinate in the receiver of the area to be copied
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the image is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the image is not a bitmap or has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void copyArea(Image image, int x, int y) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (image.type != SWT.BITMAP || image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ Rectangle rect = image.getBounds();
+ int xDisplay = data.display;
+ int xGC = OS.XCreateGC(xDisplay, image.pixmap, 0, null);
+ if (xGC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ OS.XSetSubwindowMode (xDisplay, xGC, OS.IncludeInferiors);
+ OS.XCopyArea(xDisplay, data.drawable, image.pixmap, xGC, x, y, rect.width, rect.height, 0, 0);
+ OS.XFreeGC(xDisplay, xGC);
+}
+void destroy() {
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) Cairo.cairo_destroy(cairo);
+ data.cairo = 0;
+
+ /* Free resources */
+ int clipRgn = data.clipRgn;
+ if (clipRgn != 0) OS.XDestroyRegion(clipRgn);
+ Image image = data.image;
+ if (image != null) {
+ image.memGC = null;
+ if (image.transparentPixel != -1) image.createMask();
+ }
+
+ int renderTable = data.renderTable;
+ if (renderTable != 0) OS.XmRenderTableFree(renderTable);
+ int xmString = data.xmString;
+ if (xmString != 0) OS.XmStringFree (xmString);
+ int xmText = data.xmText;
+ if (xmText != 0) OS.XmStringFree (xmText);
+ int xmMnemonic = data.xmMnemonic;
+ if (xmMnemonic != 0) OS.XmStringFree (xmMnemonic);
+
+ /* Dispose the GC */
+ if (drawable != null) drawable.internal_dispose_GC(handle, data);
+
+ data.display = data.drawable = data.colormap =
+ data.clipRgn = data.renderTable = data.xmString = data.xmText =
+ data.xmMnemonic = 0;
+ data.font = null;
+ drawable = null;
+ handle = 0;
+ data.image = null;
+ data = null;
+}
+/**
+ * Draws the outline of a circular or elliptical arc
+ * within the specified rectangular area.
+ * <p>
+ * The resulting arc begins at <code>startAngle</code> and extends
+ * for <code>arcAngle</code> degrees, using the current color.
+ * Angles are interpreted such that 0 degrees is at the 3 o'clock
+ * position. A positive value indicates a counter-clockwise rotation
+ * while a negative value indicates a clockwise rotation.
+ * </p><p>
+ * The center of the arc is the center of the rectangle whose origin
+ * is (<code>x</code>, <code>y</code>) and whose size is specified by the
+ * <code>width</code> and <code>height</code> arguments.
+ * </p><p>
+ * The resulting arc covers an area <code>width + 1</code> pixels wide
+ * by <code>height + 1</code> pixels tall.
+ * </p>
+ *
+ * @param x the x coordinate of the upper-left corner of the arc to be drawn
+ * @param y the y coordinate of the upper-left corner of the arc to be drawn
+ * @param width the width of the arc to be drawn
+ * @param height the height of the arc to be drawn
+ * @param startAngle the beginning angle
+ * @param arcAngle the angular extent of the arc, relative to the start angle
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ if (width == 0 || height == 0 || arcAngle == 0) return;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ if (width == height) {
+ if (arcAngle >= 0) {
+ Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ } else {
+ Cairo.cairo_arc(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ }
+ } else {
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f);
+ Cairo.cairo_scale(cairo, width / 2f, height / 2f);
+ if (arcAngle >= 0) {
+ Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ } else {
+ Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ }
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ OS.XDrawArc(data.display, data.drawable, handle, x, y, width, height, startAngle * 64, arcAngle * 64);
+}
+/**
+ * Draws a rectangle, based on the specified arguments, which has
+ * the appearance of the platform's <em>focus rectangle</em> if the
+ * platform supports such a notion, and otherwise draws a simple
+ * rectangle in the receiver's foreground color.
+ *
+ * @param x the x coordinate of the rectangle
+ * @param y the y coordinate of the rectangle
+ * @param width the width of the rectangle
+ * @param height the height of the rectangle
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawRectangle(int, int, int, int)
+ */
+public void drawFocus (int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ /*
+ * When the drawable is not a widget, the highlight
+ * color is zero.
+ */
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ int highlightColor = 0;
+ int widget = OS.XtWindowToWidget (xDisplay, xDrawable);
+ if (widget != 0) {
+ int [] argList = {OS.XmNhighlightColor, 0};
+ OS.XtGetValues (widget, argList, argList.length / 2);
+ highlightColor = argList [1];
+ }
+
+ /* Draw the focus rectangle */
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ int cairo = data.cairo;
+ if (cairo != 0) {
+ int lineWidth = 1;
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_set_line_width(cairo, lineWidth);
+ XColor color = new XColor();
+ color.pixel = highlightColor;
+ OS.XQueryColor (data.display, data.colormap, color);
+ Cairo.cairo_set_source_rgba(cairo, (color.red & 0xFFFF) / (float)0xFFFF, (color.green & 0xFFFF) / (float)0xFFFF, (color.blue & 0xFFFF) / (float)0xFFFF, 1);
+ Cairo.cairo_rectangle(cairo, x + lineWidth / 2f, y + lineWidth / 2f, width, height);
+ Cairo.cairo_stroke(cairo);
+ Cairo.cairo_restore(cairo);
+ return;
+ }
+ OS.XSetForeground (xDisplay, handle, highlightColor);
+ OS.XDrawRectangle (xDisplay, xDrawable, handle, x, y, width - 1, height - 1);
+ data.state &= ~(BACKGROUND | FOREGROUND);
+}
+/**
+ * Draws the given image in the receiver at the specified
+ * coordinates.
+ *
+ * @param image the image to draw
+ * @param x the x coordinate of where to draw
+ * @param y the y coordinate of where to draw
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the image is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the given coordinates are outside the bounds of the image</li>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ * @exception SWTError <ul>
+ * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
+ * </ul>
+ */
+public void drawImage(Image image, int x, int y) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ drawImage(image, 0, 0, -1, -1, x, y, -1, -1, true);
+}
+
+/**
+ * Copies a rectangular area from the source image into a (potentially
+ * different sized) rectangular area in the receiver. If the source
+ * and destination areas are of differing sizes, then the source
+ * area will be stretched or shrunk to fit the destination area
+ * as it is copied. The copy fails if any part of the source rectangle
+ * lies outside the bounds of the source image, or if any of the width
+ * or height arguments are negative.
+ *
+ * @param image the source image
+ * @param srcX the x coordinate in the source image to copy from
+ * @param srcY the y coordinate in the source image to copy from
+ * @param srcWidth the width in pixels to copy from the source
+ * @param srcHeight the height in pixels to copy from the source
+ * @param destX the x coordinate in the destination to copy to
+ * @param destY the y coordinate in the destination to copy to
+ * @param destWidth the width in pixels of the destination rectangle
+ * @param destHeight the height in pixels of the destination rectangle
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the image is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
+ * <li>ERROR_INVALID_ARGUMENT - if any of the width or height arguments are negative.
+ * <li>ERROR_INVALID_ARGUMENT - if the source rectangle is not contained within the bounds of the source image</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ * @exception SWTError <ul>
+ * <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
+ * </ul>
+ */
+public void drawImage(Image image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (srcWidth == 0 || srcHeight == 0 || destWidth == 0 || destHeight == 0) return;
+ if (srcX < 0 || srcY < 0 || srcWidth < 0 || srcHeight < 0 || destWidth < 0 || destHeight < 0) {
+ SWT.error (SWT.ERROR_INVALID_ARGUMENT);
+ }
+ if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ drawImage(image, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false);
+}
+void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) {
+ int[] width = new int[1];
+ int[] height = new int[1];
+ int[] depth = new int[1];
+ int[] unused = new int[1];
+ OS.XGetGeometry(data.display, srcImage.pixmap, unused, unused, unused, width, height, unused, depth);
+ int imgWidth = width[0];
+ int imgHeight = height[0];
+ if (simple) {
+ srcWidth = destWidth = imgWidth;
+ srcHeight = destHeight = imgHeight;
+ } else {
+ simple = srcX == 0 && srcY == 0 &&
+ srcWidth == destWidth && destWidth == imgWidth &&
+ srcHeight == destHeight && destHeight == imgHeight;
+ if (srcX + srcWidth > imgWidth || srcY + srcHeight > imgHeight) {
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ }
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ if (data.alpha != 0) {
+ srcImage.createSurface();
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_rectangle(cairo, destX , destY, destWidth, destHeight);
+ Cairo.cairo_clip(cairo);
+ Cairo.cairo_translate(cairo, destX - srcX, destY - srcY);
+ if (srcWidth != destWidth || srcHeight != destHeight) {
+ Cairo.cairo_scale(cairo, destWidth / (float)srcWidth, destHeight / (float)srcHeight);
+ }
+ int filter = Cairo.CAIRO_FILTER_GOOD;
+ switch (data.interpolation) {
+ case SWT.DEFAULT: filter = Cairo.CAIRO_FILTER_GOOD; break;
+ case SWT.NONE: filter = Cairo.CAIRO_FILTER_NEAREST; break;
+ case SWT.LOW: filter = Cairo.CAIRO_FILTER_FAST; break;
+ case SWT.HIGH: filter = Cairo.CAIRO_FILTER_BEST; break;
+ }
+ int /*long*/ pattern = Cairo.cairo_pattern_create_for_surface(srcImage.surface);
+ if (pattern == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ if (srcWidth != destWidth || srcHeight != destHeight) {
+ /*
+ * Bug in Cairo. When drawing the image streched with an interpolation
+ * alghorithm, the edges of the image are faded. This is not a bug, but
+ * it is not desired. To avoid the faded edges, it should be possible to
+ * use cairo_pattern_set_extend() to set the pattern extend to either
+ * CAIRO_EXTEND_REFLECT or CAIRO_EXTEND_PAD, but these are not implemented
+ * in some versions of cairo (1.2.x) and have bugs in others (in 1.4.2 it
+ * draws with black edges). The fix is to implement CAIRO_EXTEND_REFLECT
+ * by creating an image that is 3 times bigger than the original, drawing
+ * the original image in every quadrant (with an appropriate transform) and
+ * use this image as the pattern.
+ *
+ * NOTE: For some reaons, it is necessary to use CAIRO_EXTEND_PAD with
+ * the image that was created or the edges are still faded.
+ */
+ if (Cairo.cairo_version () >= Cairo.CAIRO_VERSION_ENCODE(1, 4, 2)) {
+ int /*long*/ surface = Cairo.cairo_image_surface_create(Cairo.CAIRO_FORMAT_ARGB32, imgWidth * 3, imgHeight * 3);
+ int /*long*/ cr = Cairo.cairo_create(surface);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_scale(cr, -1, -1);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, -imgHeight * 3);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, -imgHeight * 3);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_scale(cr, 1, -1);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth, imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, -imgWidth * 3, imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_scale(cr, -1, -1);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_set_source_surface(cr, srcImage.surface, imgWidth, -imgHeight * 3);
+ Cairo.cairo_paint(cr);
+ Cairo.cairo_destroy(cr);
+ int /*long*/ newPattern = Cairo.cairo_pattern_create_for_surface(surface);
+ Cairo.cairo_surface_destroy(surface);
+ if (newPattern == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ Cairo.cairo_pattern_destroy(pattern);
+ pattern = newPattern;
+ Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_PAD);
+ double[] matrix = new double[6];
+ Cairo.cairo_matrix_init_translate(matrix, imgWidth, imgHeight);
+ Cairo.cairo_pattern_set_matrix(pattern, matrix);
+ }
+// Cairo.cairo_pattern_set_extend(pattern, Cairo.CAIRO_EXTEND_REFLECT);
+ }
+ Cairo.cairo_pattern_set_filter(pattern, filter);
+ Cairo.cairo_set_source(cairo, pattern);
+ if (data.alpha != 0xFF) {
+ Cairo.cairo_paint_with_alpha(cairo, data.alpha / (float)0xFF);
+ } else {
+ Cairo.cairo_paint(cairo);
+ }
+ Cairo.cairo_restore(cairo);
+ Cairo.cairo_pattern_destroy(pattern);
+ }
+ return;
+ }
+ if (srcImage.alpha != -1 || srcImage.alphaData != null) {
+ drawImageAlpha(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
+ } else if (srcImage.transparentPixel != -1 || srcImage.mask != 0) {
+ drawImageMask(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
+ } else {
+ drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth[0]);
+ }
+}
+void drawImageAlpha(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
+ /* Simple cases */
+ if (srcImage.alpha == 0) return;
+ if (srcImage.alpha == 255) {
+ drawImage(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, depth);
+ return;
+ }
+ if (device.useXRender) {
+ drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, srcImage.mask, OS.PictStandardA8);
+ return;
+ }
+
+ /* Check the clipping */
+ Rectangle rect = getClipping();
+ rect = rect.intersection(new Rectangle(destX, destY, destWidth, destHeight));
+ if (rect.isEmpty()) return;
+
+ /* Optimization. Recalculate the src and dest rectangles so that
+ * only the clipping area is drawn.
+ */
+ int sx1 = srcX + (((rect.x - destX) * srcWidth) / destWidth);
+ int sx2 = srcX + ((((rect.x + rect.width) - destX) * srcWidth) / destWidth);
+ int sy1 = srcY + (((rect.y - destY) * srcHeight) / destHeight);
+ int sy2 = srcY + ((((rect.y + rect.height) - destY) * srcHeight) / destHeight);
+ destX = rect.x;
+ destY = rect.y;
+ destWidth = rect.width;
+ destHeight = rect.height;
+ srcX = sx1;
+ srcY = sy1;
+ srcWidth = Math.max(1, sx2 - sx1);
+ srcHeight = Math.max(1, sy2 - sy1);
+
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ int xDestImagePtr = 0, xSrcImagePtr = 0;
+ try {
+ /* Get the background pixels */
+ xDestImagePtr = OS.XGetImage(xDisplay, xDrawable, destX, destY, destWidth, destHeight, OS.AllPlanes, OS.ZPixmap);
+ if (xDestImagePtr == 0) return;
+ XImage xDestImage = new XImage();
+ OS.memmove(xDestImage, xDestImagePtr, XImage.sizeof);
+ byte[] destData = new byte[xDestImage.bytes_per_line * xDestImage.height];
+ OS.memmove(destData, xDestImage.data, destData.length);
+
+ /* Get the foreground pixels */
+ xSrcImagePtr = OS.XGetImage(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, OS.AllPlanes, OS.ZPixmap);
+ if (xSrcImagePtr == 0) return;
+ XImage xSrcImage = new XImage();
+ OS.memmove(xSrcImage, xSrcImagePtr, XImage.sizeof);
+ byte[] srcData = new byte[xSrcImage.bytes_per_line * xSrcImage.height];
+ OS.memmove(srcData, xSrcImage.data, srcData.length);
+
+ /* Compose the pixels */
+ if (xSrcImage.depth <= 8) {
+ XColor[] xcolors = data.device.xcolors;
+ if (xcolors == null) SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
+ byte[] reds = new byte[xcolors.length];
+ byte[] greens = new byte[xcolors.length];
+ byte[] blues = new byte[xcolors.length];
+ for (int i = 0; i < xcolors.length; i++) {
+ XColor color = xcolors[i];
+ if (color == null) continue;
+ reds[i] = (byte)((color.red >> 8) & 0xFF);
+ greens[i] = (byte)((color.green >> 8) & 0xFF);
+ blues[i] = (byte)((color.blue >> 8) & 0xFF);
+ }
+ ImageData.blit(ImageData.BLIT_ALPHA,
+ srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, reds, greens, blues,
+ srcImage.alpha, srcImage.alphaData, imgWidth, srcX, srcY,
+ destData, xDestImage.bits_per_pixel, xDestImage.bytes_per_line, xDestImage.byte_order, 0, 0, destWidth, destHeight, reds, greens, blues,
+ false, false);
+ } else {
+ int srcRedMask = xSrcImage.red_mask;
+ int srcGreenMask = xSrcImage.green_mask;
+ int srcBlueMask = xSrcImage.blue_mask;
+ int destRedMask = xDestImage.red_mask;
+ int destGreenMask = xDestImage.green_mask;
+ int destBlueMask = xDestImage.blue_mask;
+
+ /*
+ * Feature in X. XGetImage does not retrieve the RGB masks if the drawable
+ * is a Pixmap. The fix is to detect that the masks are not valid and use
+ * the default visual masks instead.
+ *
+ * NOTE: It is safe to use the default Visual masks, since we always
+ * create images with these masks.
+ */
+ int visual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay));
+ Visual xVisual = new Visual();
+ OS.memmove(xVisual, visual, Visual.sizeof);
+ if (srcRedMask == 0 && srcGreenMask == 0 && srcBlueMask == 0) {
+ srcRedMask = xVisual.red_mask;
+ srcGreenMask = xVisual.green_mask;
+ srcBlueMask = xVisual.blue_mask;
+ }
+ if (destRedMask == 0 && destGreenMask == 0 && destBlueMask == 0) {
+ destRedMask = xVisual.red_mask;
+ destGreenMask = xVisual.green_mask;
+ destBlueMask = xVisual.blue_mask;
+ }
+
+ ImageData.blit(ImageData.BLIT_ALPHA,
+ srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, srcRedMask, srcGreenMask, srcBlueMask,
+ srcImage.alpha, srcImage.alphaData, imgWidth, srcX, srcY,
+ destData, xDestImage.bits_per_pixel, xDestImage.bytes_per_line, xDestImage.byte_order, 0, 0, destWidth, destHeight, destRedMask, destGreenMask, destBlueMask,
+ false, false);
+ }
+
+ /* Draw the composed pixels */
+ OS.memmove(xDestImage.data, destData, destData.length);
+ OS.XPutImage(xDisplay, xDrawable, handle, xDestImagePtr, 0, 0, destX, destY, destWidth, destHeight);
+ } finally {
+ if (xSrcImagePtr != 0) OS.XDestroyImage(xSrcImagePtr);
+ if (xDestImagePtr != 0) OS.XDestroyImage(xDestImagePtr);
+ }
+}
+void drawImageMask(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ /* Generate the mask if necessary. */
+ if (srcImage.transparentPixel != -1) srcImage.createMask();
+
+ if (device.useXRender) {
+ drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, srcImage.mask, OS.PictStandardA1);
+ } else {
+ int colorPixmap = 0, maskPixmap = 0;
+ int foreground = 0x00000000;
+ if (simple || (srcWidth == destWidth && srcHeight == destHeight)) {
+ colorPixmap = srcImage.pixmap;
+ maskPixmap = srcImage.mask;
+ } else {
+ /* Stretch the color and mask*/
+ int xImagePtr = scalePixmap(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
+ if (xImagePtr != 0) {
+ int xMaskPtr = scalePixmap(xDisplay, srcImage.mask, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
+ if (xMaskPtr != 0) {
+ /* Create color scaled pixmaps */
+ colorPixmap = OS.XCreatePixmap(xDisplay, xDrawable, destWidth, destHeight, depth);
+ int tempGC = OS.XCreateGC(xDisplay, colorPixmap, 0, null);
+ OS.XPutImage(xDisplay, colorPixmap, tempGC, xImagePtr, 0, 0, 0, 0, destWidth, destHeight);
+ OS.XFreeGC(xDisplay, tempGC);
+
+ /* Create mask scaled pixmaps */
+ maskPixmap = OS.XCreatePixmap(xDisplay, xDrawable, destWidth, destHeight, 1);
+ tempGC = OS.XCreateGC(xDisplay, maskPixmap, 0, null);
+ OS.XPutImage(xDisplay, maskPixmap, tempGC, xMaskPtr, 0, 0, 0, 0, destWidth, destHeight);
+ OS.XFreeGC(xDisplay, tempGC);
+
+ OS.XDestroyImage(xMaskPtr);
+ }
+ OS.XDestroyImage(xImagePtr);
+ }
+
+ /* Change the source rectangle */
+ srcX = srcY = 0;
+ srcWidth = destWidth;
+ srcHeight = destHeight;
+
+ foreground = ~foreground;
+ }
+
+ /* Do the blts */
+ if (colorPixmap != 0 && maskPixmap != 0) {
+ XGCValues values = new XGCValues();
+ OS.XGetGCValues(xDisplay, handle, OS.GCForeground | OS. GCBackground | OS.GCFunction, values);
+ OS.XSetFunction(xDisplay, handle, OS.GXxor);
+ OS.XCopyArea(xDisplay, colorPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
+ OS.XSetForeground(xDisplay, handle, foreground);
+ OS.XSetBackground(xDisplay, handle, ~foreground);
+ OS.XSetFunction(xDisplay, handle, OS.GXand);
+ OS.XCopyPlane(xDisplay, maskPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY, 1);
+ OS.XSetFunction(xDisplay, handle, OS.GXxor);
+ OS.XCopyArea(xDisplay, colorPixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
+ OS.XSetForeground(xDisplay, handle, values.foreground);
+ OS.XSetBackground(xDisplay, handle, values.background);
+ OS.XSetFunction(xDisplay, handle, values.function);
+ }
+
+ /* Destroy scaled pixmaps */
+ if (colorPixmap != 0 && srcImage.pixmap != colorPixmap) OS.XFreePixmap(xDisplay, colorPixmap);
+ if (maskPixmap != 0 && srcImage.mask != maskPixmap) OS.XFreePixmap(xDisplay, maskPixmap);
+ }
+
+ /* Destroy the image mask if the there is a GC created on the image */
+ if (srcImage.transparentPixel != -1 && srcImage.memGC != null) srcImage.destroyMask();
+}
+void drawImageXRender(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int maskPixmap, int maskType) {
+ int drawable = data.drawable;
+ int xDisplay = data.display;
+ int maskPict = 0;
+ if (maskPixmap != 0) {
+ int attribCount = 0;
+ XRenderPictureAttributes attrib = null;
+ if (srcImage.alpha != -1) {
+ attribCount = 1;
+ attrib = new XRenderPictureAttributes();
+ attrib.repeat = true;
+ }
+ maskPict = OS.XRenderCreatePicture(xDisplay, maskPixmap, OS.XRenderFindStandardFormat(xDisplay, maskType), attribCount, attrib);
+ if (maskPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int format = OS.XRenderFindVisualFormat(xDisplay, OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay)));
+ int destPict = OS.XRenderCreatePicture(xDisplay, drawable, format, 0, null);
+ if (destPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ int srcPict = OS.XRenderCreatePicture(xDisplay, srcImage.pixmap, format, 0, null);
+ if (srcPict == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ if (srcWidth != destWidth || srcHeight != destHeight) {
+ int[] transform = new int[]{(int)(((float)srcWidth / destWidth) * 65536), 0, 0, 0, (int)(((float)srcHeight / destHeight) * 65536), 0, 0, 0, 65536};
+ OS.XRenderSetPictureTransform(xDisplay, srcPict, transform);
+ if (maskPict != 0) OS.XRenderSetPictureTransform(xDisplay, maskPict, transform);
+ srcX *= destWidth / (float)srcWidth;
+ srcY *= destHeight / (float)srcHeight;
+ }
+ int clipping = data.clipRgn;
+ if (data.damageRgn != 0) {
+ if (clipping == 0) {
+ clipping = data.damageRgn;
+ } else {
+ clipping = OS.XCreateRegion ();
+ OS.XUnionRegion(clipping, data.clipRgn, clipping);
+ OS.XIntersectRegion(clipping, data.damageRgn, clipping);
+ }
+ }
+ if (clipping != 0) {
+ OS.XRenderSetPictureClipRegion(xDisplay, destPict, clipping);
+ if (clipping != data.clipRgn && clipping != data.damageRgn) {
+ OS.XDestroyRegion(clipping);
+ }
+ }
+ OS.XRenderComposite(xDisplay, maskPict != 0 ? OS.PictOpOver : OS.PictOpSrc, srcPict, maskPict, destPict, srcX, srcY, srcX, srcY, destX, destY, destWidth, destHeight);
+ OS.XRenderFreePicture(xDisplay, destPict);
+ OS.XRenderFreePicture(xDisplay, srcPict);
+ if (maskPict != 0) OS.XRenderFreePicture(xDisplay, maskPict);
+}
+void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, int imgWidth, int imgHeight, int depth) {
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ /* Simple case: no stretching */
+ if ((srcWidth == destWidth) && (srcHeight == destHeight)) {
+ OS.XCopyArea(xDisplay, srcImage.pixmap, xDrawable, handle, srcX, srcY, srcWidth, srcHeight, destX, destY);
+ return;
+ }
+ if (device.useXRender) {
+ drawImageXRender(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, imgWidth, imgHeight, 0, -1);
+ return;
+ }
+
+ /* Streching case */
+ int xImagePtr = scalePixmap(xDisplay, srcImage.pixmap, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false, false);
+ if (xImagePtr != 0) {
+ OS.XPutImage(xDisplay, xDrawable, handle, xImagePtr, 0, 0, destX, destY, destWidth, destHeight);
+ OS.XDestroyImage(xImagePtr);
+ }
+}
+static int scalePixmap(int display, int pixmap, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean flipX, boolean flipY) {
+ int xSrcImagePtr = OS.XGetImage(display, pixmap, srcX, srcY, srcWidth, srcHeight, OS.AllPlanes, OS.ZPixmap);
+ if (xSrcImagePtr == 0) return 0;
+ XImage xSrcImage = new XImage();
+ OS.memmove(xSrcImage, xSrcImagePtr, XImage.sizeof);
+ byte[] srcData = new byte[xSrcImage.bytes_per_line * xSrcImage.height];
+ OS.memmove(srcData, xSrcImage.data, srcData.length);
+ OS.XDestroyImage(xSrcImagePtr);
+ int xImagePtr = 0;
+ int visual = OS.XDefaultVisual(display, OS.XDefaultScreen(display));
+ switch (xSrcImage.bits_per_pixel) {
+ case 1:
+ case 4:
+ case 8: {
+ int format = xSrcImage.bits_per_pixel == 1 ? OS.XYBitmap : OS.ZPixmap;
+ xImagePtr = OS.XCreateImage(display, visual, xSrcImage.depth, format, 0, 0, destWidth, destHeight, xSrcImage.bitmap_pad, 0);
+ if (xImagePtr == 0) return 0;
+ XImage xImage = new XImage();
+ OS.memmove(xImage, xImagePtr, XImage.sizeof);
+ int bufSize = xImage.bytes_per_line * xImage.height;
+ if (bufSize < 0) {
+ OS.XDestroyImage(xImagePtr);
+ return 0;
+ }
+ int bufPtr = OS.XtMalloc(bufSize);
+ xImage.data = bufPtr;
+ OS.memmove(xImagePtr, xImage, XImage.sizeof);
+ byte[] buf = new byte[bufSize];
+ int srcOrder = xSrcImage.bits_per_pixel == 1 ? xSrcImage.bitmap_bit_order : xSrcImage.byte_order;
+ int destOrder = xImage.bits_per_pixel == 1 ? xImage.bitmap_bit_order : xImage.byte_order;
+ ImageData.blit(ImageData.BLIT_SRC,
+ srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, srcOrder, 0, 0, srcWidth, srcHeight, null, null, null,
+ ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
+ buf, xImage.bits_per_pixel, xImage.bytes_per_line, destOrder, 0, 0, destWidth, destHeight, null, null, null,
+ flipX, flipY);
+ OS.memmove(bufPtr, buf, bufSize);
+ break;
+ }
+ case 16:
+ case 24:
+ case 32: {
+ xImagePtr = OS.XCreateImage(display, visual, xSrcImage.depth, OS.ZPixmap, 0, 0, destWidth, destHeight, xSrcImage.bitmap_pad, 0);
+ if (xImagePtr == 0) return 0;
+ XImage xImage = new XImage();
+ OS.memmove(xImage, xImagePtr, XImage.sizeof);
+ int bufSize = xImage.bytes_per_line * xImage.height;
+ if (bufSize < 0) {
+ OS.XDestroyImage(xImagePtr);
+ return 0;
+ }
+ int bufPtr = OS.XtMalloc(bufSize);
+ xImage.data = bufPtr;
+ OS.memmove(xImagePtr, xImage, XImage.sizeof);
+ byte[] buf = new byte[bufSize];
+ ImageData.blit(ImageData.BLIT_SRC,
+ srcData, xSrcImage.bits_per_pixel, xSrcImage.bytes_per_line, xSrcImage.byte_order, 0, 0, srcWidth, srcHeight, 0, 0, 0,
+ ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
+ buf, xImage.bits_per_pixel, xImage.bytes_per_line, xImage.byte_order, 0, 0, destWidth, destHeight, 0, 0, 0,
+ flipX, flipY);
+ OS.memmove(bufPtr, buf, bufSize);
+ break;
+ }
+ }
+ return xImagePtr;
+}
+/**
+ * Draws a line, using the foreground color, between the points
+ * (<code>x1</code>, <code>y1</code>) and (<code>x2</code>, <code>y2</code>).
+ *
+ * @param x1 the first point's x coordinate
+ * @param y1 the first point's y coordinate
+ * @param x2 the second point's x coordinate
+ * @param y2 the second point's y coordinate
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawLine (int x1, int y1, int x2, int y2) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ Cairo.cairo_move_to(cairo, x1 + xOffset, y1 + yOffset);
+ Cairo.cairo_line_to(cairo, x2 + xOffset, y2 + yOffset);
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ OS.XDrawLine (data.display, data.drawable, handle, x1, y1, x2, y2);
+}
+/**
+ * Draws the outline of an oval, using the foreground color,
+ * within the specified rectangular area.
+ * <p>
+ * The result is a circle or ellipse that fits within the
+ * rectangle specified by the <code>x</code>, <code>y</code>,
+ * <code>width</code>, and <code>height</code> arguments.
+ * </p><p>
+ * The oval covers an area that is <code>width + 1</code>
+ * pixels wide and <code>height + 1</code> pixels tall.
+ * </p>
+ *
+ * @param x the x coordinate of the upper left corner of the oval to be drawn
+ * @param y the y coordinate of the upper left corner of the oval to be drawn
+ * @param width the width of the oval to be drawn
+ * @param height the height of the oval to be drawn
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawOval(int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ if (width == height) {
+ Cairo.cairo_arc_negative(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f, width / 2f, 0, -2 * (float)Compatibility.PI);
+ } else {
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, x + xOffset + width / 2f, y + yOffset + height / 2f);
+ Cairo.cairo_scale(cairo, width / 2f, height / 2f);
+ Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, -2 * (float)Compatibility.PI);
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ OS.XDrawArc(data.display, data.drawable, handle, x, y, width, height, 0, 23040);
+}
+/**
+ * Draws the path described by the parameter.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param path the path to draw
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Path
+ *
+ * @since 3.1
+ */
+public void drawPath(Path path) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (path.handle == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ initCairo();
+ checkGC(DRAW);
+ int /*long*/ cairo = data.cairo;
+ Cairo.cairo_save(cairo);
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ Cairo.cairo_translate(cairo, xOffset, yOffset);
+ int /*long*/ copy = Cairo.cairo_copy_path(path.handle);
+ if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ Cairo.cairo_append_path(cairo, copy);
+ Cairo.cairo_path_destroy(copy);
+ Cairo.cairo_stroke(cairo);
+ Cairo.cairo_restore(cairo);
+}
+/**
+ * Draws a pixel, using the foreground color, at the specified
+ * point (<code>x</code>, <code>y</code>).
+ * <p>
+ * Note that the receiver's line attributes do not affect this
+ * operation.
+ * </p>
+ *
+ * @param x the point's x coordinate
+ * @param y the point's y coordinate
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.0
+ */
+public void drawPoint (int x, int y) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ Cairo.cairo_rectangle(cairo, x, y, 1, 1);
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ OS.XDrawPoint(data.display, data.drawable, handle, x, y);
+}
+/**
+ * Draws the closed polygon which is defined by the specified array
+ * of integer coordinates, using the receiver's foreground color. The array
+ * contains alternating x and y values which are considered to represent
+ * points which are the vertices of the polygon. Lines are drawn between
+ * each consecutive pair, and between the first pair and last pair in the
+ * array.
+ *
+ * @param pointArray an array of alternating x and y values which are the vertices of the polygon
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawPolygon(int[] pointArray) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ checkGC(DRAW);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ drawPolyline(cairo, pointArray, true);
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+
+ // Motif does not have a native drawPolygon() call. Instead we ensure
+ // that the first and last points are the same and call drawPolyline().
+
+ int length = pointArray.length;
+
+ // Need at least 3 points to define the polygon. If 2 or fewer points
+ // passed in, it is either a line or point so just call drawPolyline().
+ // Check what happens when XOR is implemented. We may not be able to
+ // do this optimization.
+
+ if (length < 4) {
+ drawPolyline(pointArray);
+ return;
+ }
+
+ // If first and last points are the same, the polygon is already closed.
+ // Just call drawPolyline().
+ //
+ // Check what happens when XOR is implemented. We may not be able to
+ // do this optimization.
+
+ if (pointArray[0] == pointArray[length - 2] && (pointArray[1] == pointArray[length - 1])) {
+ drawPolyline(pointArray);
+ return;
+ }
+
+ // Grow the list of points by one element and make sure the first and last
+ // points are the same. This will close the polygon and we can use the
+ // drawPolyline() call.
+
+ int newPoints[] = new int[length + 2];
+ for (int i = 0; i < length ; i++)
+ newPoints[i] = pointArray[i];
+ newPoints[length] = pointArray[0];
+ newPoints[length + 1] = pointArray[1];
+
+ drawPolyline(newPoints);
+}
+/**
+ * Draws the polyline which is defined by the specified array
+ * of integer coordinates, using the receiver's foreground color. The array
+ * contains alternating x and y values which are considered to represent
+ * points which are the corners of the polyline. Lines are drawn between
+ * each consecutive pair, but not between the first pair and last pair in
+ * the array.
+ *
+ * @param pointArray an array of alternating x and y values which are the corners of the polyline
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the point array is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawPolyline(int[] pointArray) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ checkGC(DRAW);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ drawPolyline(cairo, pointArray, false);
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ short[] xPoints = new short[pointArray.length];
+ for (int i = 0; i<pointArray.length;i++) {
+ xPoints[i] = (short) pointArray[i];
+ }
+ OS.XDrawLines(data.display,data.drawable,handle,xPoints,xPoints.length / 2, OS.CoordModeOrigin);
+}
+void drawPolyline(int /*long*/ cairo, int[] pointArray, boolean close) {
+ int count = pointArray.length / 2;
+ if (count == 0) return;
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ Cairo.cairo_move_to(cairo, pointArray[0] + xOffset, pointArray[1] + yOffset);
+ for (int i = 1, j=2; i < count; i++, j += 2) {
+ Cairo.cairo_line_to(cairo, pointArray[j] + xOffset, pointArray[j + 1] + yOffset);
+ }
+ if (close) Cairo.cairo_close_path(cairo);
+}
+/**
+ * Draws the outline of the rectangle specified by the arguments,
+ * using the receiver's foreground color. The left and right edges
+ * of the rectangle are at <code>x</code> and <code>x + width</code>.
+ * The top and bottom edges are at <code>y</code> and <code>y + height</code>.
+ *
+ * @param x the x coordinate of the rectangle to be drawn
+ * @param y the y coordinate of the rectangle to be drawn
+ * @param width the width of the rectangle to be drawn
+ * @param height the height of the rectangle to be drawn
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawRectangle (int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ Cairo.cairo_rectangle(cairo, x + xOffset, y + yOffset, width, height);
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ OS.XDrawRectangle (data.display, data.drawable, handle, x, y, width, height);
+}
+/**
+ * Draws the outline of the specified rectangle, using the receiver's
+ * foreground color. The left and right edges of the rectangle are at
+ * <code>rect.x</code> and <code>rect.x + rect.width</code>. The top
+ * and bottom edges are at <code>rect.y</code> and
+ * <code>rect.y + rect.height</code>.
+ *
+ * @param rect the rectangle to draw
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawRectangle (Rectangle rect) {
+ if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ drawRectangle (rect.x, rect.y, rect.width, rect.height);
+}
+/**
+ * Draws the outline of the round-cornered rectangle specified by
+ * the arguments, using the receiver's foreground color. The left and
+ * right edges of the rectangle are at <code>x</code> and <code>x + width</code>.
+ * The top and bottom edges are at <code>y</code> and <code>y + height</code>.
+ * The <em>roundness</em> of the corners is specified by the
+ * <code>arcWidth</code> and <code>arcHeight</code> arguments, which
+ * are respectively the width and height of the ellipse used to draw
+ * the corners.
+ *
+ * @param x the x coordinate of the rectangle to be drawn
+ * @param y the y coordinate of the rectangle to be drawn
+ * @param width the width of the rectangle to be drawn
+ * @param height the height of the rectangle to be drawn
+ * @param arcWidth the width of the arc
+ * @param arcHeight the height of the arc
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(DRAW);
+ int nx = x;
+ int ny = y;
+ int nw = width;
+ int nh = height;
+ int naw = arcWidth;
+ int nah = arcHeight;
+ if (nw < 0) {
+ nw = 0 - nw;
+ nx = nx - nw;
+ }
+ if (nh < 0) {
+ nh = 0 - nh;
+ ny = ny - nh;
+ }
+ if (naw < 0) naw = 0 - naw;
+ if (nah < 0) nah = 0 - nah;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ double xOffset = data.cairoXoffset, yOffset = data.cairoYoffset;
+ if (naw == 0 || nah == 0) {
+ Cairo.cairo_rectangle(cairo, x + xOffset, y + yOffset, width, height);
+ } else {
+ float naw2 = naw / 2f;
+ float nah2 = nah / 2f;
+ float fw = nw / naw2;
+ float fh = nh / nah2;
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, nx + xOffset, ny + yOffset);
+ Cairo.cairo_scale(cairo, naw2, nah2);
+ Cairo.cairo_move_to(cairo, fw - 1, 0);
+ Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0);
+ Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0);
+ Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI);
+ Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0);
+ Cairo.cairo_close_path(cairo);
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_stroke(cairo);
+ return;
+ }
+ int naw2 = naw / 2;
+ int nah2 = nah / 2;
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ if (nw > naw) {
+ if (nh > nah) {
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, naw, nah, 5760, 5760);
+ OS.XDrawLine(xDisplay, xDrawable, handle, nx + naw2, ny, nx + nw - naw2, ny);
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nah, 0, 5760);
+ OS.XDrawLine(xDisplay, xDrawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2);
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760);
+ OS.XDrawLine(xDisplay,xDrawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh);
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, naw, nah, 11520, 5760);
+ OS.XDrawLine(xDisplay, xDrawable, handle, nx, ny + nah2, nx, ny + nh - nah2);
+ } else {
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, naw, nh, 5760, 11520);
+ OS.XDrawLine(xDisplay, xDrawable, handle, nx + naw2, ny, nx + nw - naw2, ny);
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nh, 17280, 11520);
+ OS.XDrawLine(xDisplay,xDrawable,handle, nx + naw2, ny + nh, nx + nw - naw2, ny + nh);
+ }
+ } else {
+ if (nh > nah) {
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, nw, nah, 0, 11520);
+ OS.XDrawLine(xDisplay, xDrawable, handle, nx + nw, ny + nah2, nx + nw, ny + nh - nah2);
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, nw, nah, 11520, 11520);
+ OS.XDrawLine(xDisplay,xDrawable,handle, nx, ny + nah2, nx, ny + nh - nah2);
+ } else {
+ OS.XDrawArc(xDisplay, xDrawable, handle, nx, ny, nw, nh, 0, 23040);
+ }
+ }
+}
+/**
+ * Draws the given string, using the receiver's current font and
+ * foreground color. No tab expansion or carriage return processing
+ * will be performed. The background of the rectangular area where
+ * the string is being drawn will be filled with the receiver's
+ * background color.
+ *
+ * @param string the string to be drawn
+ * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
+ * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawString (String string, int x, int y) {
+ drawString(string, x, y, false);
+}
+/**
+ * Draws the given string, using the receiver's current font and
+ * foreground color. No tab expansion or carriage return processing
+ * will be performed. If <code>isTransparent</code> is <code>true</code>,
+ * then the background of the rectangular area where the string is being
+ * drawn will not be modified, otherwise it will be filled with the
+ * receiver's background color.
+ *
+ * @param string the string to be drawn
+ * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
+ * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
+ * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawString (String string, int x, int y, boolean isTransparent) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (string.length() == 0) return;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ //TODO - honor isTransparent
+ checkGC(FOREGROUND | FONT);
+ cairo_font_extents_t extents = new cairo_font_extents_t();
+ Cairo.cairo_font_extents(cairo, extents);
+ double baseline = y + extents.ascent;
+ Cairo.cairo_move_to(cairo, x, baseline);
+ byte[] buffer = Converter.wcsToMbcs(null, string, true);
+ Cairo.cairo_show_text(cairo, buffer);
+ Cairo.cairo_new_path(cairo);
+ return;
+ }
+ setString(string);
+ checkGC(FOREGROUND | FONT | BACKGROUND_BG);
+ if (isTransparent) {
+ OS.XmStringDraw (data.display, data.drawable, data.font.handle, data.xmString, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
+ } else {
+ OS.XmStringDrawImage (data.display, data.drawable, data.font.handle, data.xmString, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
+ }
+}
+void createRenderTable() {
+ int fontList = data.font.handle;
+ /* Get the width of the tabs */
+ byte[] buffer = {(byte)' ', 0};
+ int xmString = OS.XmStringCreate(buffer, OS.XmFONTLIST_DEFAULT_TAG);
+ int tabWidth = OS.XmStringWidth(fontList, xmString) * 8;
+ OS.XmStringFree(xmString);
+
+ /* Create the tab list */
+ int [] tabs = new int[16];
+ int tab = OS.XmTabCreate(tabWidth, (byte) OS.XmPIXELS, (byte) OS.XmRELATIVE, (byte) OS.XmALIGNMENT_BEGINNING, null);
+ for (int i = 0; i < tabs.length; i++) tabs[i] = tab;
+ int tabList = OS.XmTabListInsertTabs(0, tabs, tabs.length, 0);
+
+ /* Create a font context to iterate over the elements in the font list */
+ int[] fontBuffer = new int[1];
+ if (!OS.XmFontListInitFontContext(fontBuffer, fontList)) {
+ SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int context = fontBuffer[0], fontListEntry = 0;
+ int[] renditions = new int[4]; int renditionCount = 0;
+
+ /* Create a rendition for each entry in the font list */
+ while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
+ int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, fontBuffer);
+ int fontType = (fontBuffer [0] == 0) ? OS.XmFONT_IS_FONT : OS.XmFONT_IS_FONTSET;
+ if (fontPtr == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ int [] argList = {
+ OS.XmNtabList, tabList,
+ OS.XmNfont, fontPtr,
+ OS.XmNfontType, fontType,
+ };
+ int rendition = OS.XmRenditionCreate(data.device.shellHandle, OS.XmFONTLIST_DEFAULT_TAG, argList, argList.length / 2);
+ renditions[renditionCount++] = rendition;
+ if (renditionCount == renditions.length) {
+ int[] newArray = new int[renditions.length + 4];
+ System.arraycopy(newArray, 0, renditions, 0, renditionCount);
+ renditions = newArray;
+ }
+ }
+ OS.XmFontListFreeFontContext(context);
+ OS.XmTabFree(tab);
+ OS.XmTabListFree(tabList);
+
+ /* Create the render table from the renditions */
+ data.renderTable = OS.XmRenderTableAddRenditions(0, renditions, renditionCount, OS.XmMERGE_REPLACE);
+ for (int i = 0; i < renditionCount; i++) OS.XmRenditionFree(renditions[i]);
+}
+/**
+ * Draws the given string, using the receiver's current font and
+ * foreground color. Tab expansion and carriage return processing
+ * are performed. The background of the rectangular area where
+ * the text is being drawn will be filled with the receiver's
+ * background color.
+ *
+ * @param string the string to be drawn
+ * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
+ * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawText (String string, int x, int y) {
+ drawText(string, x, y, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
+}
+/**
+ * Draws the given string, using the receiver's current font and
+ * foreground color. Tab expansion and carriage return processing
+ * are performed. If <code>isTransparent</code> is <code>true</code>,
+ * then the background of the rectangular area where the text is being
+ * drawn will not be modified, otherwise it will be filled with the
+ * receiver's background color.
+ *
+ * @param string the string to be drawn
+ * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
+ * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
+ * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawText (String string, int x, int y, boolean isTransparent) {
+ int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB;
+ if (isTransparent) flags |= SWT.DRAW_TRANSPARENT;
+ drawText(string, x, y, flags);
+}
+/**
+ * Draws the given string, using the receiver's current font and
+ * foreground color. Tab expansion, line delimiter and mnemonic
+ * processing are performed according to the specified flags. If
+ * <code>flags</code> includes <code>DRAW_TRANSPARENT</code>,
+ * then the background of the rectangular area where the text is being
+ * drawn will not be modified, otherwise it will be filled with the
+ * receiver's background color.
+ * <p>
+ * The parameter <code>flags</code> may be a combination of:
+ * <dl>
+ * <dt><b>DRAW_DELIMITER</b></dt>
+ * <dd>draw multiple lines</dd>
+ * <dt><b>DRAW_TAB</b></dt>
+ * <dd>expand tabs</dd>
+ * <dt><b>DRAW_MNEMONIC</b></dt>
+ * <dd>underline the mnemonic character</dd>
+ * <dt><b>DRAW_TRANSPARENT</b></dt>
+ * <dd>transparent background</dd>
+ * </dl>
+ * </p>
+ *
+ * @param string the string to be drawn
+ * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
+ * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
+ * @param flags the flags specifying how to process the text
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void drawText (String string, int x, int y, int flags) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (string.length() == 0) return;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ //TODO - honor flags
+ checkGC(FOREGROUND | FONT);
+ cairo_font_extents_t extents = new cairo_font_extents_t();
+ Cairo.cairo_font_extents(cairo, extents);
+ double baseline = y + extents.ascent;
+ Cairo.cairo_move_to(cairo, x, baseline);
+ byte[] buffer = Converter.wcsToMbcs(null, string, true);
+ Cairo.cairo_show_text(cairo, buffer);
+ Cairo.cairo_new_path(cairo);
+ return;
+ }
+ setText(string, flags);
+ checkGC(FOREGROUND | FONT | BACKGROUND_BG);
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ if (data.image != null) OS.XtRegisterDrawable (xDisplay, xDrawable, data.device.shellHandle);
+ int xmMnemonic = data.xmMnemonic;
+ if (xmMnemonic != 0) {
+ OS.XmStringDrawUnderline(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null, xmMnemonic);
+ } else {
+ if ((flags & SWT.DRAW_TRANSPARENT) != 0) {
+ OS.XmStringDraw(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
+ } else {
+ OS.XmStringDrawImage(xDisplay, xDrawable, data.renderTable, data.xmText, handle, x, y, 0x7FFFFFFF, OS.XmALIGNMENT_BEGINNING, 0, null);
+ }
+ }
+ if (data.image != null) OS.XtUnregisterDrawable (xDisplay, xDrawable);
+}
+/**
+ * Compares the argument to the receiver, and returns true
+ * if they represent the <em>same</em> object using a class
+ * specific comparison.
+ *
+ * @param object the object to compare with this object
+ * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
+ *
+ * @see #hashCode
+ */
+public boolean equals (Object object) {
+ if (object == this) return true;
+ if (!(object instanceof GC)) return false;
+ return handle == ((GC)object).handle;
+}
+/**
+ * Fills the interior of a circular or elliptical arc within
+ * the specified rectangular area, with the receiver's background
+ * color.
+ * <p>
+ * The resulting arc begins at <code>startAngle</code> and extends
+ * for <code>arcAngle</code> degrees, using the current color.
+ * Angles are interpreted such that 0 degrees is at the 3 o'clock
+ * position. A positive value indicates a counter-clockwise rotation
+ * while a negative value indicates a clockwise rotation.
+ * </p><p>
+ * The center of the arc is the center of the rectangle whose origin
+ * is (<code>x</code>, <code>y</code>) and whose size is specified by the
+ * <code>width</code> and <code>height</code> arguments.
+ * </p><p>
+ * The resulting arc covers an area <code>width + 1</code> pixels wide
+ * by <code>height + 1</code> pixels tall.
+ * </p>
+ *
+ * @param x the x coordinate of the upper-left corner of the arc to be filled
+ * @param y the y coordinate of the upper-left corner of the arc to be filled
+ * @param width the width of the arc to be filled
+ * @param height the height of the arc to be filled
+ * @param startAngle the beginning angle
+ * @param arcAngle the angular extent of the arc, relative to the start angle
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawArc
+ */
+public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FILL);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ if (width == 0 || height == 0 || arcAngle == 0) return;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ if (width == height) {
+ if (arcAngle >= 0) {
+ Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ } else {
+ Cairo.cairo_arc(cairo, x + width / 2f, y + height / 2f, width / 2f, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ }
+ Cairo.cairo_line_to(cairo, x + width / 2f, y + height / 2f);
+ } else {
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f);
+ Cairo.cairo_scale(cairo, width / 2f, height / 2f);
+ if (arcAngle >= 0) {
+ Cairo.cairo_arc_negative(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ } else {
+ Cairo.cairo_arc(cairo, 0, 0, 1, -startAngle * (float)Compatibility.PI / 180, -(startAngle + arcAngle) * (float)Compatibility.PI / 180);
+ }
+ Cairo.cairo_line_to(cairo, 0, 0);
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ OS.XFillArc(data.display, data.drawable, handle, x, y, width, height, startAngle * 64, arcAngle * 64);
+}
+
+/**
+ * Fills the interior of the specified rectangle with a gradient
+ * sweeping from left to right or top to bottom progressing
+ * from the receiver's foreground color to its background color.
+ *
+ * @param x the x coordinate of the rectangle to be filled
+ * @param y the y coordinate of the rectangle to be filled
+ * @param width the width of the rectangle to be filled, may be negative
+ * (inverts direction of gradient if horizontal)
+ * @param height the height of the rectangle to be filled, may be negative
+ * (inverts direction of gradient if vertical)
+ * @param vertical if true sweeps from top to bottom, else
+ * sweeps from left to right
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawRectangle(int, int, int, int)
+ */
+public void fillGradientRectangle(int x, int y, int width, int height, boolean vertical) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if ((width == 0) || (height == 0)) return;
+
+ RGB backgroundRGB, foregroundRGB;
+ backgroundRGB = getBackground().getRGB();
+ foregroundRGB = getForeground().getRGB();
+
+ RGB fromRGB, toRGB;
+ fromRGB = foregroundRGB;
+ toRGB = backgroundRGB;
+ boolean swapColors = false;
+ if (width < 0) {
+ x += width; width = -width;
+ if (! vertical) swapColors = true;
+ }
+ if (height < 0) {
+ y += height; height = -height;
+ if (vertical) swapColors = true;
+ }
+ if (swapColors) {
+ fromRGB = backgroundRGB;
+ toRGB = foregroundRGB;
+ }
+ if (fromRGB.equals(toRGB)) {
+ fillRectangle(x, y, width, height);
+ return;
+ }
+ /* X Window deals with a virtually limitless array of color formats
+ * but we only distinguish between paletted and direct modes
+ */
+ int xDisplay = data.display;
+ int xScreenNum = OS.XDefaultScreen(xDisplay);
+ final int xScreen = OS.XDefaultScreenOfDisplay(xDisplay);
+ final int xVisual = OS.XDefaultVisual(xDisplay, xScreenNum);
+ Visual visual = new Visual();
+ OS.memmove(visual, xVisual, Visual.sizeof);
+ final int depth = OS.XDefaultDepthOfScreen(xScreen);
+ final boolean directColor = (depth > 8);
+
+ // This code is intentionally commented since elsewhere in SWT we
+ // assume that depth <= 8 means we are in a paletted mode though
+ // this is not always the case.
+ //final boolean directColor = (visual.c_class == OS.TrueColor) || (visual.c_class == OS.DirectColor);
+
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ int /*long*/ pattern;
+ if (vertical) {
+ pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 0.0, 1.0);
+ } else {
+ pattern = Cairo.cairo_pattern_create_linear (0.0, 0.0, 1.0, 0.0);
+ }
+ Cairo.cairo_pattern_add_color_stop_rgba (pattern, 0, fromRGB.red / 255f, fromRGB.green / 255f, fromRGB.blue / 255f, data.alpha / 255f);
+ Cairo.cairo_pattern_add_color_stop_rgba (pattern, 1, toRGB.red / 255f, toRGB.green / 255f, toRGB.blue / 255f, data.alpha / 255f);
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, x, y);
+ Cairo.cairo_scale(cairo, width, height);
+ Cairo.cairo_rectangle(cairo, 0, 0, 1, 1);
+ Cairo.cairo_set_source(cairo, pattern);
+ Cairo.cairo_fill(cairo);
+ Cairo.cairo_restore(cairo);
+ Cairo.cairo_pattern_destroy(pattern);
+ return;
+ }
+ final int redBits, greenBits, blueBits;
+ if (directColor) {
+ // RGB mapped display
+ redBits = getChannelWidth(visual.red_mask);
+ greenBits = getChannelWidth(visual.green_mask);
+ blueBits = getChannelWidth(visual.blue_mask);
+ } else {
+ // Index display
+ redBits = greenBits = blueBits = 0;
+ }
+ ImageData.fillGradientRectangle(this, data.device,
+ x, y, width, height, vertical, fromRGB, toRGB,
+ redBits, greenBits, blueBits);
+}
+
+/**
+ * Computes the required channel width (depth) from a mask.
+ */
+static int getChannelWidth(int mask) {
+ int width = 0;
+ while (mask != 0) {
+ width += (mask & 1);
+ mask >>>= 1;
+ }
+ return width;
+}
+
+/**
+ * Fills the interior of an oval, within the specified
+ * rectangular area, with the receiver's background
+ * color.
+ *
+ * @param x the x coordinate of the upper left corner of the oval to be filled
+ * @param y the y coordinate of the upper left corner of the oval to be filled
+ * @param width the width of the oval to be filled
+ * @param height the height of the oval to be filled
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawOval
+ */
+public void fillOval (int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FILL);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ if (width == height) {
+ Cairo.cairo_arc_negative(cairo, x + width / 2f, y + height / 2f, width / 2f, 0, 2 * (float)Compatibility.PI);
+ } else {
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, x + width / 2f, y + height / 2f);
+ Cairo.cairo_scale(cairo, width / 2f, height / 2f);
+ Cairo.cairo_arc_negative(cairo, 0, 0, 1, 0, 2 * (float)Compatibility.PI);
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ OS.XFillArc (data.display, data.drawable, handle, x, y, width, height, 0, 23040);
+}
+/**
+ * Fills the path described by the parameter.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param path the path to fill
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Path
+ *
+ * @since 3.1
+ */
+public void fillPath (Path path) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (path == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (path.handle == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ initCairo();
+ checkGC(FILL);
+ int /*long*/ cairo = data.cairo;
+ int /*long*/ copy = Cairo.cairo_copy_path(path.handle);
+ if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ Cairo.cairo_append_path(cairo, copy);
+ Cairo.cairo_path_destroy(copy);
+ Cairo.cairo_fill(cairo);
+}
+/**
+ * Fills the interior of the closed polygon which is defined by the
+ * specified array of integer coordinates, using the receiver's
+ * background color. The array contains alternating x and y values
+ * which are considered to represent points which are the vertices of
+ * the polygon. Lines are drawn between each consecutive pair, and
+ * between the first pair and last pair in the array.
+ *
+ * @param pointArray an array of alternating x and y values which are the vertices of the polygon
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawPolygon
+ */
+public void fillPolygon(int[] pointArray) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ checkGC(FILL);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ drawPolyline(cairo, pointArray, true);
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ short[] xPoints = new short[pointArray.length];
+ for (int i = 0; i<pointArray.length;i++) {
+ xPoints[i] = (short) pointArray[i];
+ }
+ OS.XFillPolygon(data.display, data.drawable, handle,xPoints, xPoints.length / 2, OS.Complex, OS.CoordModeOrigin);
+}
+/**
+ * Fills the interior of the rectangle specified by the arguments,
+ * using the receiver's background color.
+ *
+ * @param x the x coordinate of the rectangle to be filled
+ * @param y the y coordinate of the rectangle to be filled
+ * @param width the width of the rectangle to be filled
+ * @param height the height of the rectangle to be filled
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawRectangle(int, int, int, int)
+ */
+public void fillRectangle (int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FILL);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ Cairo.cairo_rectangle(cairo, x, y, width, height);
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ OS.XFillRectangle (data.display, data.drawable, handle, x, y, width, height);
+}
+/**
+ * Fills the interior of the specified rectangle, using the receiver's
+ * background color.
+ *
+ * @param rect the rectangle to be filled
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawRectangle(int, int, int, int)
+ */
+public void fillRectangle (Rectangle rect) {
+ if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ fillRectangle(rect.x, rect.y, rect.width, rect.height);
+}
+/**
+ * Fills the interior of the round-cornered rectangle specified by
+ * the arguments, using the receiver's background color.
+ *
+ * @param x the x coordinate of the rectangle to be filled
+ * @param y the y coordinate of the rectangle to be filled
+ * @param width the width of the rectangle to be filled
+ * @param height the height of the rectangle to be filled
+ * @param arcWidth the width of the arc
+ * @param arcHeight the height of the arc
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #drawRoundRectangle
+ */
+public void fillRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FILL);
+ int nx = x;
+ int ny = y;
+ int nw = width;
+ int nh = height;
+ int naw = arcWidth;
+ int nah = arcHeight;
+ if (nw < 0) {
+ nw = 0 - nw;
+ nx = nx - nw;
+ }
+ if (nh < 0) {
+ nh = 0 - nh;
+ ny = ny -nh;
+ }
+ if (naw < 0) naw = 0 - naw;
+ if (nah < 0) nah = 0 - nah;
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ if (naw == 0 || nah == 0) {
+ Cairo.cairo_rectangle(cairo, x, y, width, height);
+ } else {
+ float naw2 = naw / 2f;
+ float nah2 = nah / 2f;
+ float fw = nw / naw2;
+ float fh = nh / nah2;
+ Cairo.cairo_save(cairo);
+ Cairo.cairo_translate(cairo, nx, ny);
+ Cairo.cairo_scale(cairo, naw2, nah2);
+ Cairo.cairo_move_to(cairo, fw - 1, 0);
+ Cairo.cairo_arc(cairo, fw - 1, 1, 1, Compatibility.PI + Compatibility.PI/2.0, Compatibility.PI*2.0);
+ Cairo.cairo_arc(cairo, fw - 1, fh - 1, 1, 0, Compatibility.PI/2.0);
+ Cairo.cairo_arc(cairo, 1, fh - 1, 1, Compatibility.PI/2, Compatibility.PI);
+ Cairo.cairo_arc(cairo, 1, 1, 1, Compatibility.PI, 270.0*Compatibility.PI/180.0);
+ Cairo.cairo_close_path(cairo);
+ Cairo.cairo_restore(cairo);
+ }
+ Cairo.cairo_fill(cairo);
+ return;
+ }
+ int naw2 = naw / 2;
+ int nah2 = nah / 2;
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ if (nw > naw) {
+ if (nh > nah) {
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, naw, nah, 5760, 5760);
+ OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny, nw - naw2 * 2, nah2);
+ OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nah, 0, 5760);
+ OS.XFillRectangle(xDisplay, xDrawable, handle, nx, ny + nah2, nw, nh - nah2 * 2);
+ OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny + nh - nah, naw, nah, 17280, 5760);
+ OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny + nh - nah2, nw - naw2 * 2, nah2);
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, naw, nah, 11520, 5760);
+ } else {
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, naw, nh, 5760, 11520);
+ OS.XFillRectangle(xDisplay, xDrawable, handle, nx + naw2, ny, nw - naw2 * 2, nh);
+ OS.XFillArc(xDisplay, xDrawable, handle, nx + nw - naw, ny, naw, nh, 17280, 11520);
+ }
+ } else {
+ if (nh > nah) {
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, nw, nah, 0, 11520);
+ OS.XFillRectangle(xDisplay, xDrawable, handle, nx, ny + nah2, nw, nh - nah2 * 2);
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny + nh - nah, nw, nah, 11520, 11520);
+ } else {
+ OS.XFillArc(xDisplay, xDrawable, handle, nx, ny, nw, nh, 0, 23040);
+ }
+ }
+}
+char fixMnemonic(char[] text) {
+ char mnemonic=0;
+ int i=0, j=0;
+ while (i < text.length) {
+ if ((text [j++] = text [i++]) == '&') {
+ if (i == text.length) {continue;}
+ if (text [i] == '&') {i++; continue;}
+ if (mnemonic == 0) mnemonic = text [i];
+ j--;
+ }
+ }
+ while (j < text.length) text [j++] = 0;
+ return mnemonic;
+}
+/**
+ * Returns the <em>advance width</em> of the specified character in
+ * the font which is currently selected into the receiver.
+ * <p>
+ * The advance width is defined as the horizontal distance the cursor
+ * should move after printing the character in the selected font.
+ * </p>
+ *
+ * @param ch the character to measure
+ * @return the distance in the x direction to move past the character before painting the next
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public int getAdvanceWidth(char ch) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FONT);
+ int fontList = data.font.handle;
+ byte[] charBuffer = Converter.wcsToMbcs(getCodePage (), new char[] { ch }, false);
+ int val = charBuffer[0] & 0xFF;
+ /* Create a font context to iterate over each element in the font list */
+ int[] buffer = new int[1];
+ if (!OS.XmFontListInitFontContext(buffer, fontList)) {
+ SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int context = buffer[0];
+ XFontStruct fontStruct = new XFontStruct();
+ XCharStruct charStruct = new XCharStruct();
+ int fontListEntry;
+ int[] fontStructPtr = new int[1];
+ int[] fontNamePtr = new int[1];
+ /* Go through each entry in the font list. */
+ while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
+ int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
+ if (buffer[0] == 0) {
+ OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
+ /* FontList contains a single font */
+ if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
+ /* Single byte fontStruct */
+ if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ } else {
+ OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return charWidth;
+ }
+ }
+ } else {
+ /* Double byte fontStruct */
+ int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ int row = 0;
+ if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
+ int col = charBuffer[0] - fontStruct.min_char_or_byte2;
+ if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ } else {
+ int offset = row * charsPerRow + col;
+ OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return charWidth;
+ }
+ }
+ }
+ } else {
+ /* FontList contains a fontSet */
+ int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
+ int [] fontStructs = new int[nFonts];
+ OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
+ /* Go through each fontStruct in the font set */
+ for (int i = 0; i < nFonts; i++) {
+ OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
+ if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
+ /* Single byte fontStruct */
+ if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ } else {
+ OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return charWidth;
+ }
+ }
+ } else {
+ /* Double byte fontStruct */
+ int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ int row = 0;
+ if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
+ int col = charBuffer[0] - fontStruct.min_char_or_byte2;
+ if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ } else {
+ int offset = row * charsPerRow + col;
+ OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return charWidth;
+ }
+ }
+ }
+ }
+ }
+ }
+ OS.XmFontListFreeFontContext(context);
+ return stringExtent(new String(new char[]{ch})).x;
+}
+/**
+ * Returns <code>true</code> if receiver is using the operating system's
+ * advanced graphics subsystem. Otherwise, <code>false</code> is returned
+ * to indicate that normal graphics are in use.
+ * <p>
+ * Advanced graphics may not be installed for the operating system. In this
+ * case, <code>false</code> is always returned. Some operating system have
+ * only one graphics subsystem. If this subsystem supports advanced graphics,
+ * then <code>true</code> is always returned. If any graphics operation such
+ * as alpha, antialias, patterns, interpolation, paths, clipping or transformation
+ * has caused the receiver to switch from regular to advanced graphics mode,
+ * <code>true</code> is returned. If the receiver has been explicitly switched
+ * to advanced mode and this mode is supported, <code>true</code> is returned.
+ * </p>
+ *
+ * @return the advanced value
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public boolean getAdvanced() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.cairo != 0;
+}
+/**
+ * Returns the receiver's alpha value. The alpha value
+ * is between 0 (transparent) and 255 (opaque).
+ *
+ * @return the alpha value
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int getAlpha() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.alpha;
+}
+/**
+ * Returns the receiver's anti-aliasing setting value, which will be
+ * one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or
+ * <code>SWT.ON</code>. Note that this controls anti-aliasing for all
+ * <em>non-text drawing</em> operations.
+ *
+ * @return the anti-aliasing setting
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #getTextAntialias
+ *
+ * @since 3.1
+ */
+public int getAntialias() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0) return SWT.DEFAULT;
+ int antialias = Cairo.cairo_get_antialias(data.cairo);
+ switch (antialias) {
+ case Cairo.CAIRO_ANTIALIAS_DEFAULT: return SWT.DEFAULT;
+ case Cairo.CAIRO_ANTIALIAS_NONE: return SWT.OFF;
+ case Cairo.CAIRO_ANTIALIAS_GRAY:
+ case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return SWT.ON;
+ }
+ return SWT.DEFAULT;
+}
+/**
+ * Returns the background color.
+ *
+ * @return the receiver's background color
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Color getBackground() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ XColor color = data.background;
+ if ((data.state & BACKGROUND_RGB) == 0) {
+ OS.XQueryColor(data.display, data.colormap, color);
+ data.state |= BACKGROUND_RGB;
+ }
+ return Color.motif_new(data.device, color);
+}
+/**
+ * Returns the background pattern. The default value is
+ * <code>null</code>.
+ *
+ * @return the receiver's background pattern
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Pattern
+ *
+ * @since 3.1
+ */
+public Pattern getBackgroundPattern() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.backgroundPattern;
+}
+/**
+ * Returns the width of the specified character in the font
+ * selected into the receiver.
+ * <p>
+ * The width is defined as the space taken up by the actual
+ * character, not including the leading and tailing whitespace
+ * or overhang.
+ * </p>
+ *
+ * @param ch the character to measure
+ * @return the width of the character
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public int getCharWidth(char ch) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FONT);
+ int fontList = data.font.handle;
+ byte[] charBuffer = Converter.wcsToMbcs(getCodePage (), new char[] { ch }, false);
+ int val = charBuffer[0] & 0xFF;
+ /* Create a font context to iterate over each element in the font list */
+ int[] buffer = new int[1];
+ if (!OS.XmFontListInitFontContext(buffer, fontList)) {
+ SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int context = buffer[0];
+ XFontStruct fontStruct = new XFontStruct();
+ XCharStruct charStruct = new XCharStruct();
+ int fontListEntry;
+ int[] fontStructPtr = new int[1];
+ int[] fontNamePtr = new int[1];
+ /* Go through each entry in the font list. */
+ while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
+ int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
+ if (buffer[0] == 0) {
+ OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
+ /* FontList contains a single font */
+ if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
+ /* Single byte fontStruct */
+ if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int lBearing = 0;
+ int rBearing = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width and left/right bearings as the font.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ lBearing = fontStruct.min_bounds_lbearing;
+ rBearing = fontStruct.max_bounds_rbearing;
+ } else {
+ OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ lBearing = charStruct.lbearing;
+ rBearing = charStruct.rbearing;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return rBearing - lBearing;
+ }
+ }
+ } else {
+ /* Double byte fontStruct */
+ int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ int row = 0;
+ if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
+ int col = charBuffer[0] - fontStruct.min_char_or_byte2;
+ if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int lBearing = 0;
+ int rBearing = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width and left/right bearings as the font.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ lBearing = fontStruct.min_bounds_lbearing;
+ rBearing = fontStruct.max_bounds_rbearing;
+ } else {
+ int offset = row * charsPerRow + col;
+ OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ lBearing = charStruct.lbearing;
+ rBearing = charStruct.rbearing;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return rBearing - lBearing;
+ }
+ }
+ }
+ } else {
+ /* FontList contains a fontSet */
+ int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
+ int [] fontStructs = new int[nFonts];
+ OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
+ /* Go through each fontStruct in the font set */
+ for (int i = 0; i < nFonts; i++) {
+ OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
+ if (fontStruct.min_byte1 == 0 && fontStruct.max_byte1 == 0) {
+ /* Single byte fontStruct */
+ if (fontStruct.min_char_or_byte2 <= val && val <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int lBearing = 0;
+ int rBearing = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width and left/right bearings as the font.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ lBearing = fontStruct.min_bounds_lbearing;
+ rBearing = fontStruct.max_bounds_rbearing;
+ } else {
+ OS.memmove(charStruct, perCharPtr + ((val - fontStruct.min_char_or_byte2) * XCharStruct.sizeof), XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ lBearing = charStruct.lbearing;
+ rBearing = charStruct.rbearing;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return rBearing - lBearing;
+ }
+ }
+ } else {
+ /* Double byte fontStruct */
+ int charsPerRow = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ int row = 0;
+ if (charBuffer.length > 1) row = charBuffer[1] - fontStruct.min_byte1;
+ int col = charBuffer[0] - fontStruct.min_char_or_byte2;
+ if (row <= fontStruct.max_byte1 && col <= fontStruct.max_char_or_byte2) {
+ /* The font contains the character */
+ int charWidth = 0;
+ int lBearing = 0;
+ int rBearing = 0;
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width and left/right bearings as the font.
+ */
+ charWidth = fontStruct.max_bounds_width;
+ lBearing = fontStruct.min_bounds_lbearing;
+ rBearing = fontStruct.max_bounds_rbearing;
+ } else {
+ int offset = row * charsPerRow + col;
+ OS.memmove(charStruct, perCharPtr + offset * XCharStruct.sizeof, XCharStruct.sizeof);
+ charWidth = charStruct.width;
+ lBearing = charStruct.lbearing;
+ rBearing = charStruct.rbearing;
+ }
+ if (charWidth != 0) {
+ OS.XmFontListFreeFontContext(context);
+ return rBearing - lBearing;
+ }
+ }
+ }
+ }
+ }
+ }
+ OS.XmFontListFreeFontContext(context);
+ return stringExtent(new String(new char[]{ch})).x;
+}
+/**
+ * Returns the bounding rectangle of the receiver's clipping
+ * region. If no clipping region is set, the return value
+ * will be a rectangle which covers the entire bounds of the
+ * object the receiver is drawing on.
+ *
+ * @return the bounding rectangle of the clipping region
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Rectangle getClipping() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ /* Calculate visible bounds in device space */
+ int x = 0, y = 0, width = 0, height = 0;
+ int[] w = new int[1], h = new int[1], unused = new int[1];
+ OS.XGetGeometry(data.display, data.drawable, unused, unused, unused, w, h, unused, unused);
+ width = w[0];
+ height = h[0];
+ /* Intersect visible bounds with clipping in device space and then convert then to user space */
+ int cairo = data.cairo;
+ int clipRgn = data.clipRgn;
+ int damageRgn = data.damageRgn;
+ if (clipRgn != 0 || damageRgn != 0 || cairo != 0) {
+ int rgn = OS.XCreateRegion ();
+ XRectangle rect = new XRectangle();
+ rect.width = (short)width;
+ rect.height = (short)height;
+ OS.XUnionRectWithRegion(rect, rgn, rgn);
+ if (damageRgn != 0) {
+ OS.XIntersectRegion (damageRgn, rgn, rgn);
+ }
+ /* Intersect visible bounds with clipping */
+ if (clipRgn != 0) {
+ /* Convert clipping to device space if needed */
+ if (data.clippingTransform != null) {
+ clipRgn = convertRgn(clipRgn, data.clippingTransform);
+ OS.XIntersectRegion(rgn, clipRgn, rgn);
+ OS.XDestroyRegion(clipRgn);
+ } else {
+ OS.XIntersectRegion(rgn, clipRgn, rgn);
+ }
+ }
+ /* Convert to user space */
+ if (cairo != 0) {
+ double[] matrix = new double[6];
+ Cairo.cairo_get_matrix(cairo, matrix);
+ Cairo.cairo_matrix_invert(matrix);
+ clipRgn = convertRgn(rgn, matrix);
+ OS.XDestroyRegion(rgn);
+ rgn = clipRgn;
+ }
+ OS.XClipBox(rgn, rect);
+ OS.XDestroyRegion(rgn);
+ x = rect.x;
+ y = rect.y;
+ width = rect.width;
+ height = rect.height;
+ }
+ return new Rectangle(x, y, width, height);
+}
+/**
+ * Sets the region managed by the argument to the current
+ * clipping region of the receiver.
+ *
+ * @param region the region to fill with the clipping region
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the region is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the region is disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void getClipping(Region region) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ int clipping = region.handle;
+ OS.XSubtractRegion (clipping, clipping, clipping);
+ int /*long*/ cairo = data.cairo;
+ int clipRgn = data.clipRgn;
+ if (clipRgn == 0) {
+ int[] width = new int[1], height = new int[1], unused = new int[1];
+ OS.XGetGeometry(data.display, data.drawable, unused, unused, unused, width, height, unused, unused);
+ XRectangle rect = new XRectangle();
+ rect.x = 0;
+ rect.y = 0;
+ rect.width = (short)width[0];
+ rect.height = (short)height[0];
+ OS.XUnionRectWithRegion(rect, clipping, clipping);
+ } else {
+ /* Convert clipping to device space if needed */
+ if (data.clippingTransform != null) {
+ int rgn = convertRgn(clipRgn, data.clippingTransform);
+ OS.XUnionRegion(clipping, rgn, clipping);
+ OS.XDestroyRegion(rgn);
+ } else {
+ OS.XUnionRegion(clipping, clipRgn, clipping);
+ }
+ }
+ if (data.damageRgn != 0) {
+ OS.XIntersectRegion(clipping, data.damageRgn, clipping);
+ }
+ /* Convert to user space */
+ if (cairo != 0) {
+ double[] matrix = new double[6];
+ Cairo.cairo_get_matrix(cairo, matrix);
+ Cairo.cairo_matrix_invert(matrix);
+ int rgn = convertRgn(clipping, matrix);
+ OS.XSubtractRegion(clipping, clipping, clipping);
+ OS.XUnionRegion(clipping, rgn, clipping);
+ OS.XDestroyRegion(rgn);
+ }
+}
+String getCodePage () {
+ return data.font.codePage;
+}
+/**
+ * Returns the receiver's fill rule, which will be one of
+ * <code>SWT.FILL_EVEN_ODD</code> or <code>SWT.FILL_WINDING</code>.
+ *
+ * @return the receiver's fill rule
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int getFillRule() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ XGCValues values = new XGCValues();
+ OS.XGetGCValues(data.display, handle, OS.GCFillRule, values);
+ return values.fill_rule == OS.WindingRule ? SWT.FILL_WINDING : SWT.FILL_EVEN_ODD;
+}
+/**
+ * Returns the font currently being used by the receiver
+ * to draw and measure text.
+ *
+ * @return the receiver's font
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Font getFont () {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return Font.motif_new(data.device, data.font.handle);
+}
+int getFontHeight () {
+ int fontList = data.font.handle;
+ /* Create a font context to iterate over each element in the font list */
+ int [] buffer = new int [1];
+ if (!OS.XmFontListInitFontContext (buffer, fontList)) {
+ SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int context = buffer [0];
+
+ /* Values discovering during iteration */
+ int height = 0;
+ XFontStruct fontStruct = new XFontStruct ();
+ int fontListEntry;
+ int [] fontStructPtr = new int [1];
+ int [] fontNamePtr = new int [1];
+
+ /* Go through each entry in the font list. */
+ while ((fontListEntry = OS.XmFontListNextEntry (context)) != 0) {
+ int fontPtr = OS.XmFontListEntryGetFont (fontListEntry, buffer);
+ if (buffer [0] == 0) {
+ /* FontList contains a single font */
+ OS.memmove (fontStruct, fontPtr, XFontStruct.sizeof);
+ int fontHeight = fontStruct.ascent + fontStruct.descent;
+ height = Math.max(height, fontHeight);
+ } else {
+ /* FontList contains a fontSet */
+ int nFonts = OS.XFontsOfFontSet (fontPtr, fontStructPtr, fontNamePtr);
+ int [] fontStructs = new int [nFonts];
+ OS.memmove (fontStructs, fontStructPtr [0], nFonts * 4);
+
+ /* Go through each fontStruct in the font set */
+ for (int i=0; i<nFonts; i++) {
+ OS.memmove (fontStruct, fontStructs[i], XFontStruct.sizeof);
+ int fontHeight = fontStruct.ascent + fontStruct.descent;
+ height = Math.max(height, fontHeight);
+ }
+ }
+ }
+
+ OS.XmFontListFreeFontContext (context);
+ return height;
+}
+/**
+ * Returns a FontMetrics which contains information
+ * about the font currently being used by the receiver
+ * to draw and measure text.
+ *
+ * @return font metrics for the receiver's font
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public FontMetrics getFontMetrics() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ checkGC(FONT);
+ int xDisplay = data.display;
+ Font font = data.font;
+ int fontList = font.handle;
+ /* Create a font context to iterate over each element in the font list */
+ int[] buffer = new int[1];
+ if (!OS.XmFontListInitFontContext(buffer, fontList)) {
+ SWT.error(SWT.ERROR_NO_HANDLES);
+ }
+ int context = buffer[0];
+ /* Values discovering during iteration */
+ int ascent = 0;
+ int descent = 0;
+ int averageCharWidth = 0, numAverageCharWidth = 0;
+ int leading = 0;
+ int height = 0;
+
+ XFontStruct fontStruct = new XFontStruct();
+ int fontListEntry;
+ int[] fontStructPtr = new int[1];
+ int[] fontNamePtr = new int[1];
+ /* Go through each entry in the font list. */
+ while ((fontListEntry = OS.XmFontListNextEntry(context)) != 0) {
+ int fontPtr = OS.XmFontListEntryGetFont(fontListEntry, buffer);
+ if (buffer[0] == 0) {
+ /* FontList contains a single font */
+ OS.memmove(fontStruct, fontPtr, XFontStruct.sizeof);
+ ascent = Math.max(ascent, fontStruct.ascent);
+ descent = Math.max(descent, fontStruct.descent);
+ int fontHeight = fontStruct.ascent + fontStruct.descent;
+ height = Math.max(height, fontHeight);
+ /* Calculate average character width */
+ int propPtr = fontStruct.properties;
+ for (int i = 0; i < fontStruct.n_properties; i++) {
+ /* Look through properties for XAFONT */
+ int[] prop = new int[2];
+ OS.memmove(prop, propPtr, 8);
+ if (prop[0] == OS.XA_FONT) {
+ /* Found it, prop[1] points to the string */
+ int ptr = OS.XmGetAtomName(xDisplay, prop[1]);
+ int length = OS.strlen(ptr);
+ byte[] nameBuf = new byte[length];
+ OS.memmove(nameBuf, ptr, length);
+ OS.XFree(ptr);
+ String xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
+ int avg = 0;
+ try {
+ avg = FontData.motif_new(xlfd).averageWidth / 10;
+ } catch (Exception e) {
+ // leave avg unchanged so that it will be computed below
+ }
+ if (avg == 0) {
+ /*
+ * Not all fonts have average character width encoded
+ * in the xlfd. This one doesn't, so do it the hard
+ * way by averaging all the character widths.
+ */
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width. So no
+ * averaging is required.
+ */
+ averageCharWidth = fontStruct.max_bounds_width;
+ } else {
+ int sum = 0, count = 0;
+ int cols = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ XCharStruct struct = new XCharStruct();
+ for (int index = 0; index < cols; index++) {
+ OS.memmove(struct, perCharPtr + (index * XCharStruct.sizeof), XCharStruct.sizeof);
+ int w = struct.width;
+ if (w != 0) {
+ sum += w;
+ count++;
+ }
+ }
+ averageCharWidth += sum / count;
+ }
+ } else {
+ /* Average character width was in the xlfd */
+ averageCharWidth += avg;
+ }
+ numAverageCharWidth++;
+ break;
+ }
+ propPtr += 8;
+ }
+ } else {
+ /* FontList contains a fontSet */
+ int nFonts = OS.XFontsOfFontSet(fontPtr, fontStructPtr, fontNamePtr);
+ int [] fontStructs = new int[nFonts];
+ OS.memmove(fontStructs, fontStructPtr[0], nFonts * 4);
+ /* Go through each fontStruct in the font set */
+ for (int i = 0; i < nFonts; i++) {
+ OS.memmove(fontStruct, fontStructs[i], XFontStruct.sizeof);
+ ascent = Math.max(ascent, fontStruct.ascent);
+ descent = Math.max(descent, fontStruct.descent);
+ int fontHeight = fontStruct.ascent + fontStruct.descent;
+ height = Math.max(height, fontHeight);
+ /* Calculate average character width */
+ int propPtr = fontStruct.properties;
+ for (int j = 0; j < fontStruct.n_properties; j++) {
+ /* Look through properties for XAFONT */
+ int[] prop = new int[2];
+ OS.memmove(prop, propPtr, 8);
+ if (prop[0] == OS.XA_FONT) {
+ /* Found it, prop[1] points to the string */
+ int ptr = OS.XmGetAtomName(xDisplay, prop[1]);
+ int length = OS.strlen(ptr);
+ byte[] nameBuf = new byte[length];
+ OS.memmove(nameBuf, ptr, length);
+ OS.XFree(ptr);
+ String xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
+ int avg = 0;
+ try {
+ avg = FontData.motif_new(xlfd).averageWidth / 10;
+ } catch (Exception e) {
+ /*
+ * Some font servers, for example, xfstt, do not pass
+ * reasonable font properties to the client, so we
+ * cannot construct a FontData for these. Use the font
+ * name instead.
+ */
+ int[] fontName = new int[1];
+ OS.memmove(fontName, fontNamePtr [0] + (i * 4), 4);
+ ptr = fontName[0];
+ if (ptr != 0 ) {
+ length = OS.strlen(ptr);
+ nameBuf = new byte[length];
+ OS.memmove(nameBuf, ptr, length);
+ xlfd = new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase();
+ try {
+ avg = FontData.motif_new(xlfd).averageWidth / 10;
+ } catch (Exception ex) {
+ // leave avg unchanged (0) so that it will be computed below
+ }
+ }
+ }
+ if (avg == 0) {
+ /*
+ * Not all fonts have average character width encoded
+ * in the xlfd. This one doesn't, so do it the hard
+ * way by averaging all the character widths.
+ */
+ int perCharPtr = fontStruct.per_char;
+ if (perCharPtr == 0) {
+ /*
+ * If perCharPtr is 0 then all glyphs in the font have
+ * the same width as the font's maximum width. So no
+ * averaging is required.
+ */
+ averageCharWidth = fontStruct.max_bounds_width;
+ } else {
+ int sum = 0, count = 0;
+ int cols = fontStruct.max_char_or_byte2 - fontStruct.min_char_or_byte2 + 1;
+ XCharStruct struct = new XCharStruct();
+ for (int index = 0; index < cols; index++) {
+ OS.memmove(struct, perCharPtr + (index * XCharStruct.sizeof), XCharStruct.sizeof);
+ int w = struct.width;
+ if (w != 0) {
+ sum += w;
+ count++;
+ }
+ }
+ averageCharWidth += sum / count;
+ }
+ } else {
+ /* Average character width was in the xlfd */
+ averageCharWidth += avg;
+ }
+ numAverageCharWidth++;
+ break;
+ }
+ propPtr += 8;
+ }
+ }
+ }
+ }
+ OS.XmFontListFreeFontContext(context);
+ return FontMetrics.motif_new(ascent, descent, averageCharWidth / numAverageCharWidth, leading, height);
+}
+/**
+ * Returns the receiver's foreground color.
+ *
+ * @return the color used for drawing foreground things
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Color getForeground() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ XColor color = data.foreground;
+ if ((data.state & FOREGROUND_RGB) == 0) {
+ OS.XQueryColor(data.display, data.colormap, color);
+ data.state |= FOREGROUND_RGB;
+ }
+ return Color.motif_new(data.device, color);
+}
+/**
+ * Returns the foreground pattern. The default value is
+ * <code>null</code>.
+ *
+ * @return the receiver's foreground pattern
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Pattern
+ *
+ * @since 3.1
+ */
+public Pattern getForegroundPattern() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.foregroundPattern;
+}
+/**
+ * Returns the GCData.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
+ * API for <code>GC</code>. It is marked public only so that it
+ * can be shared within the packages provided by SWT. It is not
+ * available on all platforms, and should never be called from
+ * application code.
+ * </p>
+ *
+ * @return the receiver's GCData
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see GCData
+ *
+ * @since 3.2
+ * @noreference This method is not intended to be referenced by clients.
+ */
+public GCData getGCData() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data;
+}
+/**
+ * Returns the receiver's interpolation setting, which will be one of
+ * <code>SWT.DEFAULT</code>, <code>SWT.NONE</code>,
+ * <code>SWT.LOW</code> or <code>SWT.HIGH</code>.
+ *
+ * @return the receiver's interpolation setting
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int getInterpolation() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.interpolation;
+}
+/**
+ * Returns the receiver's line attributes.
+ *
+ * @return the line attributes used for drawing lines
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.3
+ */
+public LineAttributes getLineAttributes() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ float[] dashes = null;
+ if (data.lineDashes != null) {
+ dashes = new float[data.lineDashes.length];
+ System.arraycopy(data.lineDashes, 0, dashes, 0, dashes.length);
+ }
+ return new LineAttributes(data.lineWidth, data.lineCap, data.lineJoin, data.lineStyle, dashes, data.lineDashesOffset, data.lineMiterLimit);
+}
+/**
+ * Returns the receiver's line cap style, which will be one
+ * of the constants <code>SWT.CAP_FLAT</code>, <code>SWT.CAP_ROUND</code>,
+ * or <code>SWT.CAP_SQUARE</code>.
+ *
+ * @return the cap style used for drawing lines
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int getLineCap() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.lineCap;
+}
+/**
+ * Returns the receiver's line dash style. The default value is
+ * <code>null</code>.
+ *
+ * @return the line dash style used for drawing lines
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int[] getLineDash() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.lineDashes == null) return null;
+ int[] lineDashes = new int[data.lineDashes.length];
+ for (int i = 0; i < lineDashes.length; i++) {
+ lineDashes[i] = (int)data.lineDashes[i];
+ }
+ return lineDashes;
+}
+/**
+ * Returns the receiver's line join style, which will be one
+ * of the constants <code>SWT.JOIN_MITER</code>, <code>SWT.JOIN_ROUND</code>,
+ * or <code>SWT.JOIN_BEVEL</code>.
+ *
+ * @return the join style used for drawing lines
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public int getLineJoin() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.lineJoin;
+}
+/**
+ * Returns the receiver's line style, which will be one
+ * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
+ * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
+ * <code>SWT.LINE_DASHDOTDOT</code>.
+ *
+ * @return the style used for drawing lines
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public int getLineStyle() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.lineStyle;
+}
+/**
+ * Returns the width that will be used when drawing lines
+ * for all of the figure drawing operations (that is,
+ * <code>drawLine</code>, <code>drawRectangle</code>,
+ * <code>drawPolyline</code>, and so forth.
+ *
+ * @return the receiver's line width
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public int getLineWidth() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return (int)data.lineWidth;
+}
+/**
+ * Returns the receiver's style information.
+ * <p>
+ * Note that the value which is returned by this method <em>may
+ * not match</em> the value which was provided to the constructor
+ * when the receiver was created. This can occur when the underlying
+ * operating system does not support a particular combination of
+ * requested styles.
+ * </p>
+ *
+ * @return the style bits
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public int getStyle () {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.style;
+}
+/**
+ * Returns the receiver's text drawing anti-aliasing setting value,
+ * which will be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or
+ * <code>SWT.ON</code>. Note that this controls anti-aliasing
+ * <em>only</em> for text drawing operations.
+ *
+ * @return the anti-aliasing setting
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #getAntialias
+ *
+ * @since 3.1
+ */
+public int getTextAntialias() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0) return SWT.DEFAULT;
+ int /*long*/ options = Cairo.cairo_font_options_create();
+ Cairo.cairo_get_font_options(data.cairo, options);
+ int antialias = Cairo.cairo_font_options_get_antialias(options);
+ Cairo.cairo_font_options_destroy(options);
+ switch (antialias) {
+ case Cairo.CAIRO_ANTIALIAS_DEFAULT: return SWT.DEFAULT;
+ case Cairo.CAIRO_ANTIALIAS_NONE: return SWT.OFF;
+ case Cairo.CAIRO_ANTIALIAS_GRAY:
+ case Cairo.CAIRO_ANTIALIAS_SUBPIXEL: return SWT.ON;
+ }
+ return SWT.DEFAULT;
+}
+/**
+ * Sets the parameter to the transform that is currently being
+ * used by the receiver.
+ *
+ * @param transform the destination to copy the transform into
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Transform
+ *
+ * @since 3.1
+ */
+public void getTransform(Transform transform) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (transform == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (transform.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ Cairo.cairo_get_matrix(cairo, transform.handle);
+ } else {
+ transform.setElements(1, 0, 0, 1, 0, 0);
+ }
+}
+/**
+ * Returns <code>true</code> if this GC is drawing in the mode
+ * where the resulting color in the destination is the
+ * <em>exclusive or</em> of the color values in the source
+ * and the destination, and <code>false</code> if it is
+ * drawing in the mode where the destination color is being
+ * replaced with the source color value.
+ *
+ * @return <code>true</code> true if the receiver is in XOR mode, and false otherwise
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public boolean getXORMode() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ XGCValues values = new XGCValues ();
+ OS.XGetGCValues (data.display, handle, OS.GCFunction, values);
+ return values.function == OS.GXxor;
+}
+/**
+ * Returns an integer hash code for the receiver. Any two
+ * objects that return <code>true</code> when passed to
+ * <code>equals</code> must return the same value for this
+ * method.
+ *
+ * @return the receiver's hash
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #equals
+ */
+public int hashCode () {
+ return handle;
+}
+void init(Drawable drawable, GCData data, int xGC) {
+ if (data.foreground != null) data.state &= ~(FOREGROUND | FOREGROUND_RGB);
+ if (data.background != null) data.state &= ~(BACKGROUND | BACKGROUND_BG | BACKGROUND_RGB);
+ if (data.font != null) data.state &= ~FONT;
+ Image image = data.image;
+ if (image != null) {
+ image.memGC = this;
+ /*
+ * The transparent pixel mask might change when drawing on
+ * the image. Destroy it so that it is regenerated when
+ * necessary.
+ */
+ if (image.transparentPixel != -1) image.destroyMask();
+ }
+ this.drawable = drawable;
+ this.data = data;
+ handle = xGC;
+}
+void initCairo() {
+ data.device.checkCairo();
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) return;
+ int xDisplay = data.display;
+ int xDrawable = data.drawable;
+ int xVisual = OS.XDefaultVisual(xDisplay, OS.XDefaultScreen(xDisplay));
+ int[] width = new int[1], height = new int[1], unused = new int[1];
+ OS.XGetGeometry(xDisplay, xDrawable, unused, unused, unused, width, height, unused, unused);
+ int /*long*/ surface = Cairo.cairo_xlib_surface_create(xDisplay, xDrawable, xVisual, width[0], height[0]);
+ if (surface == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ data.cairo = cairo = Cairo.cairo_create(surface);
+ Cairo.cairo_surface_destroy(surface);
+ if (cairo == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ Cairo.cairo_set_fill_rule(cairo, Cairo.CAIRO_FILL_RULE_EVEN_ODD);
+ data.state &= ~(BACKGROUND | FOREGROUND | FONT | LINE_WIDTH | LINE_CAP | LINE_JOIN | LINE_STYLE | DRAW_OFFSET);
+ setCairoClip(data.damageRgn, data.clipRgn);
+}
+/**
+ * Returns <code>true</code> if the receiver has a clipping
+ * region set into it, and <code>false</code> otherwise.
+ * If this method returns false, the receiver will draw on all
+ * available space in the destination. If it returns true,
+ * it will draw only in the area that is covered by the region
+ * that can be accessed with <code>getClipping(region)</code>.
+ *
+ * @return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public boolean isClipped() {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ return data.clipRgn != 0;
+}
+/**
+ * Returns <code>true</code> if the GC has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the GC.
+ * When a GC has been disposed, it is an error to
+ * invoke any other method using the GC.
+ *
+ * @return <code>true</code> when the GC is disposed and <code>false</code> otherwise
+ */
+public boolean isDisposed() {
+ return handle == 0;
+}
+boolean isIdentity(double[] matrix) {
+ if (matrix == null) return true;
+ return matrix[0] == 1 && matrix[1] == 0 && matrix[2] == 0 && matrix[3] == 1 && matrix[4] == 0 && matrix[5] == 0;
+}
+/**
+ * Sets the receiver to always use the operating system's advanced graphics
+ * subsystem for all graphics operations if the argument is <code>true</code>.
+ * If the argument is <code>false</code>, the advanced graphics subsystem is
+ * no longer used, advanced graphics state is cleared and the normal graphics
+ * subsystem is used from now on.
+ * <p>
+ * Normally, the advanced graphics subsystem is invoked automatically when
+ * any one of the alpha, antialias, patterns, interpolation, paths, clipping
+ * or transformation operations in the receiver is requested. When the receiver
+ * is switched into advanced mode, the advanced graphics subsystem performs both
+ * advanced and normal graphics operations. Because the two subsystems are
+ * different, their output may differ. Switching to advanced graphics before
+ * any graphics operations are performed ensures that the output is consistent.
+ * </p><p>
+ * Advanced graphics may not be installed for the operating system. In this
+ * case, this operation does nothing. Some operating system have only one
+ * graphics subsystem, so switching from normal to advanced graphics does
+ * nothing. However, switching from advanced to normal graphics will always
+ * clear the advanced graphics state, even for operating systems that have
+ * only one graphics subsystem.
+ * </p>
+ *
+ * @param advanced the new advanced graphics state
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #setAlpha
+ * @see #setAntialias
+ * @see #setBackgroundPattern
+ * @see #setClipping(Path)
+ * @see #setForegroundPattern
+ * @see #setLineAttributes
+ * @see #setInterpolation
+ * @see #setTextAntialias
+ * @see #setTransform
+ * @see #getAdvanced
+ *
+ * @since 3.1
+ */
+public void setAdvanced(boolean advanced) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (advanced && data.cairo != 0) return;
+ if (advanced) {
+ try {
+ initCairo();
+ } catch (SWTException e) {}
+ } else {
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) Cairo.cairo_destroy(cairo);
+ data.cairo = 0;
+ data.interpolation = SWT.DEFAULT;
+ data.backgroundPattern = data.foregroundPattern = null;
+ data.state = 0;
+ setClipping(0);
+ }
+}
+/**
+ * Sets the receiver's alpha value which must be
+ * between 0 (transparent) and 255 (opaque).
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ * @param alpha the alpha value
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setAlpha(int alpha) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0 && (alpha & 0xff) == 0xff) return;
+ initCairo();
+ data.alpha = alpha & 0xff;
+ data.state &= ~(BACKGROUND | FOREGROUND | BACKGROUND_BG);
+}
+/**
+ * Sets the receiver's anti-aliasing value to the parameter,
+ * which must be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code>
+ * or <code>SWT.ON</code>. Note that this controls anti-aliasing for all
+ * <em>non-text drawing</em> operations.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param antialias the anti-aliasing setting
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>SWT.DEFAULT</code>,
+ * <code>SWT.OFF</code> or <code>SWT.ON</code></li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see #getAdvanced
+ * @see #setAdvanced
+ * @see #setTextAntialias
+ *
+ * @since 3.1
+ */
+public void setAntialias(int antialias) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0 && antialias == SWT.DEFAULT) return;
+ int mode = 0;
+ switch (antialias) {
+ case SWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break;
+ case SWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break;
+ case SWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY;
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ initCairo();
+ int /*long*/ cairo = data.cairo;
+ Cairo.cairo_set_antialias(cairo, mode);
+}
+/**
+ * Invokes platform specific functionality to allocate a new graphics context.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
+ * API for <code>GC</code>. It is marked public only so that it
+ * can be shared within the packages provided by SWT. It is not
+ * available on all platforms, and should never be called from
+ * application code.
+ * </p>
+ *
+ * @param drawable the Drawable for the receiver.
+ * @param data the data for the receiver.
+ *
+ * @return a new <code>GC</code>
+ */
+public static GC motif_new(Drawable drawable, GCData data) {
+ GC gc = new GC();
+ int xGC = drawable.internal_new_GC(data);
+ gc.device = data.device;
+ gc.init(drawable, data, xGC);
+ return gc;
+}
+/**
+ * Invokes platform specific functionality to wrap a graphics context.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
+ * API for <code>GC</code>. It is marked public only so that it
+ * can be shared within the packages provided by SWT. It is not
+ * available on all platforms, and should never be called from
+ * application code.
+ * </p>
+ *
+ * @param xGC the X Windows graphics context.
+ * @param data the data for the receiver.
+ *
+ * @return a new <code>GC</code>
+ */
+public static GC motif_new(int xGC, GCData data) {
+ GC gc = new GC();
+ gc.device = data.device;
+ gc.init(null, data, xGC);
+ return gc;
+}
+/**
+ * Sets the background color. The background color is used
+ * for fill operations and as the background color when text
+ * is drawn.
+ *
+ * @param color the new background color for the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the color is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setBackground (Color color) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ data.background = color.handle;
+ data.backgroundPattern = null;
+ data.state &= ~(BACKGROUND | BACKGROUND_BG);
+ data.state |= BACKGROUND_RGB;
+}
+/**
+ * Sets the background pattern. The default value is <code>null</code>.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param pattern the new background pattern
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Pattern
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setBackgroundPattern(Pattern pattern) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (pattern != null && pattern.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ if (data.cairo == 0 && pattern == null) return;
+ initCairo();
+ if (data.backgroundPattern == pattern) return;
+ data.backgroundPattern = pattern;
+ data.state &= ~BACKGROUND;
+}
+static void setCairoFont(int /*long*/ cairo, Font font) {
+ //TODO - use X font instead of loading new one???
+ FontData[] fds = font.getFontData();
+ FontData fd = fds[0];
+ int style = fd.getStyle();
+ int slant = Cairo.CAIRO_FONT_SLANT_NORMAL;
+ if ((style & SWT.ITALIC) != 0) slant = Cairo.CAIRO_FONT_SLANT_ITALIC;
+ int weight = Cairo.CAIRO_FONT_WEIGHT_NORMAL;
+ if ((style & SWT.BOLD) != 0) weight = Cairo.CAIRO_FONT_WEIGHT_BOLD;
+ String name = fd.getName();
+ int index = name.indexOf('-');
+ if (index != -1) name = name.substring(index + 1);
+ byte[] buffer = Converter.wcsToMbcs(null, name, true);
+ Cairo.cairo_select_font_face(cairo, buffer, slant, weight);
+ Cairo.cairo_set_font_size(cairo, fd.getHeight());
+}
+static void setCairoRegion(int /*long*/ cairo, int /*long*/ rgn) {
+ //TODO - get rectangles from region instead of clip box
+ XRectangle rect = new XRectangle();
+ OS.XClipBox(rgn, rect);
+ Cairo.cairo_rectangle(cairo, rect.x, rect.y, rect.width, rect.height);
+}
+static void setCairoPatternColor(int /*long*/ pattern, int offset, Color c, int alpha) {
+ XColor color = c.handle;
+ double aa = (alpha & 0xFF) / (double)0xFF;
+ double red = ((color.red & 0xFFFF) / (double)0xFFFF);
+ double green = ((color.green & 0xFFFF) / (double)0xFFFF);
+ double blue = ((color.blue & 0xFFFF) / (double)0xFFFF);
+ Cairo.cairo_pattern_add_color_stop_rgba(pattern, offset, red, green, blue, aa);
+}
+void setCairoClip(int /*long*/ damageRgn, int /*long*/ clipRgn) {
+ int /*long*/ cairo = data.cairo;
+ Cairo.cairo_reset_clip(cairo);
+ if (damageRgn != 0) {
+ double[] matrix = new double[6];
+ Cairo.cairo_get_matrix(cairo, matrix);
+ Cairo.cairo_identity_matrix(cairo);
+ setCairoRegion(cairo, damageRgn);
+ Cairo.cairo_clip(cairo);
+ Cairo.cairo_set_matrix(cairo, matrix);
+ }
+ if (clipRgn != 0) {
+ setCairoRegion(cairo, clipRgn);
+ Cairo.cairo_clip(cairo);
+ }
+}
+void setClipping(int clipRgn) {
+ int /*long*/ cairo = data.cairo;
+ if (clipRgn == 0) {
+ if (data.clipRgn != 0) {
+ OS.XDestroyRegion (data.clipRgn);
+ data.clipRgn = 0;
+ }
+ if (cairo != 0) {
+ data.clippingTransform = null;
+ setCairoClip(data.damageRgn, 0);
+ } else {
+ if (data.damageRgn == 0) {
+ OS.XSetClipMask (data.display, handle, OS.None);
+ } else {
+ OS.XSetRegion (data.display, handle, data.damageRgn);
+ }
+ }
+ } else {
+ if (data.clipRgn == 0) data.clipRgn = OS.XCreateRegion ();
+ OS.XSubtractRegion (data.clipRgn, data.clipRgn, data.clipRgn);
+ OS.XUnionRegion (clipRgn, data.clipRgn, data.clipRgn);
+ if (cairo != 0) {
+ if (data.clippingTransform == null) data.clippingTransform = new double[6];
+ Cairo.cairo_get_matrix(cairo, data.clippingTransform);
+ setCairoClip(data.damageRgn, clipRgn);
+ } else {
+ int clipping = clipRgn;
+ if (data.damageRgn != 0) {
+ clipping = OS.XCreateRegion();
+ OS.XUnionRegion(clipping, clipRgn, clipping);
+ OS.XIntersectRegion(clipping, data.damageRgn, clipping);
+ }
+ OS.XSetRegion (data.display, handle, clipping);
+ if (clipping != clipRgn) OS.XDestroyRegion(clipping);
+ }
+ }
+}
+/**
+ * Sets the area of the receiver which can be changed
+ * by drawing operations to the rectangular area specified
+ * by the arguments.
+ *
+ * @param x the x coordinate of the clipping rectangle
+ * @param y the y coordinate of the clipping rectangle
+ * @param width the width of the clipping rectangle
+ * @param height the height of the clipping rectangle
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setClipping (int x, int y, int width, int height) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (width < 0) {
+ x = x + width;
+ width = -width;
+ }
+ if (height < 0) {
+ y = y + height;
+ height = -height;
+ }
+ XRectangle rect = new XRectangle ();
+ rect.x = (short) x;
+ rect.y = (short) y;
+ rect.width = (short) Math.max (0, width);
+ rect.height = (short) Math.max (0, height);
+ int clipRgn = OS.XCreateRegion();
+ OS.XUnionRectWithRegion(rect, clipRgn, clipRgn);
+ setClipping(clipRgn);
+ OS.XDestroyRegion(clipRgn);
+}
+/**
+ * Sets the area of the receiver which can be changed
+ * by drawing operations to the path specified
+ * by the argument.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param path the clipping path.
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the path has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Path
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setClipping(Path path) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (path != null && path.isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ setClipping(0);
+ if (path != null) {
+ initCairo();
+ int /*long*/ cairo = data.cairo;
+ int /*long*/ copy = Cairo.cairo_copy_path(path.handle);
+ if (copy == 0) SWT.error(SWT.ERROR_NO_HANDLES);
+ Cairo.cairo_append_path(cairo, copy);
+ Cairo.cairo_path_destroy(copy);
+ Cairo.cairo_clip(cairo);
+ Cairo.cairo_new_path(cairo);
+ }
+}
+/**
+ * Sets the area of the receiver which can be changed
+ * by drawing operations to the rectangular area specified
+ * by the argument. Specifying <code>null</code> for the
+ * rectangle reverts the receiver's clipping area to its
+ * original value.
+ *
+ * @param rect the clipping rectangle or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setClipping (Rectangle rect) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (rect == null) {
+ setClipping(0);
+ } else {
+ setClipping (rect.x, rect.y, rect.width, rect.height);
+ }
+}
+/**
+ * Sets the area of the receiver which can be changed
+ * by drawing operations to the region specified
+ * by the argument. Specifying <code>null</code> for the
+ * region reverts the receiver's clipping area to its
+ * original value.
+ *
+ * @param region the clipping region or <code>null</code>
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the region has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setClipping (Region region) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (region != null && region.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ setClipping(region != null ? region.handle : 0);
+}
+/**
+ * Sets the receiver's fill rule to the parameter, which must be one of
+ * <code>SWT.FILL_EVEN_ODD</code> or <code>SWT.FILL_WINDING</code>.
+ *
+ * @param rule the new fill rule
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>SWT.FILL_EVEN_ODD</code>
+ * or <code>SWT.FILL_WINDING</code></li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void setFillRule(int rule) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ int mode = OS.EvenOddRule, cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD;
+ switch (rule) {
+ case SWT.FILL_WINDING:
+ mode = OS.WindingRule; cairo_mode = Cairo.CAIRO_FILL_RULE_WINDING; break;
+ case SWT.FILL_EVEN_ODD:
+ mode = OS.EvenOddRule; cairo_mode = Cairo.CAIRO_FILL_RULE_EVEN_ODD; break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ OS.XSetFillRule(data.display, handle, mode);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ Cairo.cairo_set_fill_rule(cairo, cairo_mode);
+ }
+}
+/**
+ * Sets the font which will be used by the receiver
+ * to draw and measure text to the argument. If the
+ * argument is null, then a default font appropriate
+ * for the platform will be used instead.
+ *
+ * @param font the new font for the receiver, or null to indicate a default font
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setFont (Font font) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (font != null && font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ data.font = font != null ? font : data.device.systemFont;
+ data.state &= ~FONT;
+ if (data.renderTable != 0) OS.XmRenderTableFree(data.renderTable);
+ data.renderTable = 0;
+ data.stringWidth = data.stringHeight = data.textWidth = data.textHeight = -1;
+}
+/**
+ * Sets the foreground color. The foreground color is used
+ * for drawing operations including when text is drawn.
+ *
+ * @param color the new foreground color for the receiver
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the color is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setForeground (Color color) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ data.foreground = color.handle;
+ data.foregroundPattern = null;
+ data.state &= ~FOREGROUND;
+ data.state |= FOREGROUND_RGB;
+}
+/**
+ * Sets the foreground pattern. The default value is <code>null</code>.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ * @param pattern the new foreground pattern
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Pattern
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setForegroundPattern(Pattern pattern) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (pattern != null && pattern.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ if (data.cairo == 0 && pattern == null) return;
+ initCairo();
+ if (data.foregroundPattern == pattern) return;
+ data.foregroundPattern = pattern;
+ data.state &= ~FOREGROUND;
+}
+/**
+ * Sets the receiver's interpolation setting to the parameter, which
+ * must be one of <code>SWT.DEFAULT</code>, <code>SWT.NONE</code>,
+ * <code>SWT.LOW</code> or <code>SWT.HIGH</code>.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param interpolation the new interpolation setting
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the rule is not one of <code>SWT.DEFAULT</code>,
+ * <code>SWT.NONE</code>, <code>SWT.LOW</code> or <code>SWT.HIGH</code>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setInterpolation(int interpolation) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0 && interpolation == SWT.DEFAULT) return;
+ switch (interpolation) {
+ case SWT.DEFAULT:
+ case SWT.NONE:
+ case SWT.LOW:
+ case SWT.HIGH:
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ initCairo();
+ data.interpolation = interpolation;
+}
+/**
+ * Sets the receiver's line attributes.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ * @param attributes the line attributes
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the attributes is null</li>
+ * <li>ERROR_INVALID_ARGUMENT - if any of the line attributes is not valid</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see LineAttributes
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.3
+ */
+public void setLineAttributes(LineAttributes attributes) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (attributes == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ int mask = 0;
+ float lineWidth = attributes.width;
+ if (lineWidth != data.lineWidth) {
+ mask |= LINE_WIDTH | DRAW_OFFSET;
+ }
+ int lineStyle = attributes.style;
+ if (lineStyle != data.lineStyle) {
+ mask |= LINE_STYLE;
+ switch (lineStyle) {
+ case SWT.LINE_SOLID:
+ case SWT.LINE_DASH:
+ case SWT.LINE_DOT:
+ case SWT.LINE_DASHDOT:
+ case SWT.LINE_DASHDOTDOT:
+ break;
+ case SWT.LINE_CUSTOM:
+ if (attributes.dash == null) lineStyle = SWT.LINE_SOLID;
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ }
+ int join = attributes.join;
+ if (join != data.lineJoin) {
+ mask |= LINE_JOIN;
+ switch (join) {
+ case SWT.CAP_ROUND:
+ case SWT.CAP_FLAT:
+ case SWT.CAP_SQUARE:
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ }
+ int cap = attributes.cap;
+ if (cap != data.lineCap) {
+ mask |= LINE_CAP;
+ switch (cap) {
+ case SWT.JOIN_MITER:
+ case SWT.JOIN_ROUND:
+ case SWT.JOIN_BEVEL:
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ }
+ float[] dashes = attributes.dash;
+ float[] lineDashes = data.lineDashes;
+ if (dashes != null && dashes.length > 0) {
+ boolean changed = lineDashes == null || lineDashes.length != dashes.length;
+ for (int i = 0; i < dashes.length; i++) {
+ float dash = dashes[i];
+ if (dash <= 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ if (!changed && lineDashes[i] != dash) changed = true;
+ }
+ if (changed) {
+ float[] newDashes = new float[dashes.length];
+ System.arraycopy(dashes, 0, newDashes, 0, dashes.length);
+ dashes = newDashes;
+ mask |= LINE_STYLE;
+ } else {
+ dashes = lineDashes;
+ }
+ } else {
+ if (lineDashes != null && lineDashes.length > 0) {
+ mask |= LINE_STYLE;
+ } else {
+ dashes = lineDashes;
+ }
+ }
+ float dashOffset = attributes.dashOffset;
+ if (dashOffset != data.lineDashesOffset) {
+ mask |= LINE_STYLE;
+ }
+ float miterLimit = attributes.miterLimit;
+ if (miterLimit != data.lineMiterLimit) {
+ mask |= LINE_MITERLIMIT;
+ }
+ initCairo();
+ if (mask == 0) return;
+ data.lineWidth = lineWidth;
+ data.lineStyle = lineStyle;
+ data.lineCap = cap;
+ data.lineJoin = join;
+ data.lineDashes = dashes;
+ data.lineDashesOffset = dashOffset;
+ data.lineMiterLimit = miterLimit;
+ data.state &= ~mask;
+}
+/**
+ * Sets the receiver's line cap style to the argument, which must be one
+ * of the constants <code>SWT.CAP_FLAT</code>, <code>SWT.CAP_ROUND</code>,
+ * or <code>SWT.CAP_SQUARE</code>.
+ *
+ * @param cap the cap style to be used for drawing lines
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void setLineCap(int cap) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.lineCap == cap) return;
+ switch (cap) {
+ case SWT.CAP_ROUND:
+ case SWT.CAP_FLAT:
+ case SWT.CAP_SQUARE:
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ data.lineCap = cap;
+ data.state &= ~LINE_CAP;
+}
+/**
+ * Sets the receiver's line dash style to the argument. The default
+ * value is <code>null</code>. If the argument is not <code>null</code>,
+ * the receiver's line style is set to <code>SWT.LINE_CUSTOM</code>, otherwise
+ * it is set to <code>SWT.LINE_SOLID</code>.
+ *
+ * @param dashes the dash style to be used for drawing lines
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if any of the values in the array is less than or equal 0</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void setLineDash(int[] dashes) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ float[] lineDashes = data.lineDashes;
+ if (dashes != null && dashes.length > 0) {
+ boolean changed = data.lineStyle != SWT.LINE_CUSTOM || lineDashes == null || lineDashes.length != dashes.length;
+ for (int i = 0; i < dashes.length; i++) {
+ int dash = dashes[i];
+ if (dash <= 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ if (!changed && lineDashes[i] != dash) changed = true;
+ }
+ if (!changed) return;
+ data.lineDashes = new float[dashes.length];
+ for (int i = 0; i < dashes.length; i++) {
+ data.lineDashes[i] = dashes[i];
+ }
+ data.lineStyle = SWT.LINE_CUSTOM;
+ } else {
+ if (data.lineStyle == SWT.LINE_SOLID && (lineDashes == null || lineDashes.length == 0)) return;
+ data.lineDashes = null;
+ data.lineStyle = SWT.LINE_SOLID;
+ }
+ data.state &= ~LINE_STYLE;
+}
+/**
+ * Sets the receiver's line join style to the argument, which must be one
+ * of the constants <code>SWT.JOIN_MITER</code>, <code>SWT.JOIN_ROUND</code>,
+ * or <code>SWT.JOIN_BEVEL</code>.
+ *
+ * @param join the join style to be used for drawing lines
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public void setLineJoin(int join) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.lineJoin == join) return;
+ switch (join) {
+ case SWT.JOIN_MITER:
+ case SWT.JOIN_ROUND:
+ case SWT.JOIN_BEVEL:
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ data.lineJoin = join;
+ data.state &= ~LINE_JOIN;
+}
+/**
+ * Sets the receiver's line style to the argument, which must be one
+ * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
+ * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
+ * <code>SWT.LINE_DASHDOTDOT</code>.
+ *
+ * @param lineStyle the style to be used for drawing lines
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the style is not valid</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setLineStyle(int lineStyle) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.lineStyle == lineStyle) return;
+ switch (lineStyle) {
+ case SWT.LINE_SOLID:
+ case SWT.LINE_DASH:
+ case SWT.LINE_DOT:
+ case SWT.LINE_DASHDOT:
+ case SWT.LINE_DASHDOTDOT:
+ break;
+ case SWT.LINE_CUSTOM:
+ if (data.lineDashes == null) lineStyle = SWT.LINE_SOLID;
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ data.lineStyle = lineStyle;
+ data.state &= ~LINE_STYLE;
+}
+/**
+ * Sets the width that will be used when drawing lines
+ * for all of the figure drawing operations (that is,
+ * <code>drawLine</code>, <code>drawRectangle</code>,
+ * <code>drawPolyline</code>, and so forth.
+ * <p>
+ * Note that line width of zero is used as a hint to
+ * indicate that the fastest possible line drawing
+ * algorithms should be used. This means that the
+ * output may be different from line width one.
+ * </p>
+ *
+ * @param lineWidth the width of a line
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void setLineWidth(int lineWidth) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.lineWidth == lineWidth) return;
+ data.lineWidth = lineWidth;
+ data.state &= ~(LINE_WIDTH | DRAW_OFFSET);
+}
+void setString(String string) {
+ if (string == data.string) return;
+ if (data.xmString != 0) OS.XmStringFree(data.xmString);
+ byte[] buffer = Converter.wcsToMbcs(getCodePage (), string, true);
+ data.xmString = OS.XmStringCreate(buffer, OS.XmFONTLIST_DEFAULT_TAG);
+ data.string = string;
+ data.stringWidth = data.stringHeight = -1;
+}
+void setText(String string, int flags) {
+ if (data.renderTable == 0) createRenderTable();
+ if (string == data.text && (flags & ~SWT.DRAW_TRANSPARENT) == (data.drawFlags & ~SWT.DRAW_TRANSPARENT)) {
+ return;
+ }
+ if (data.xmText != 0) OS.XmStringFree(data.xmText);
+ if (data.xmMnemonic != 0) OS.XmStringFree(data.xmMnemonic);
+ char mnemonic = 0;
+ int tableLength = 0;
+ Device device = data.device;
+ int[] parseTable = new int[2];
+ char[] text = new char[string.length()];
+ string.getChars(0, text.length, text, 0);
+ if ((flags & SWT.DRAW_DELIMITER) != 0) parseTable[tableLength++] = device.crMapping;
+ if ((flags & SWT.DRAW_TAB) != 0) parseTable[tableLength++] = device.tabMapping;
+ if ((flags & SWT.DRAW_MNEMONIC) != 0) mnemonic = fixMnemonic(text);
+ String codePage = getCodePage();
+ byte[] buffer = Converter.wcsToMbcs(codePage, text, true);
+ data.xmText = OS.XmStringParseText(buffer, 0, OS.XmFONTLIST_DEFAULT_TAG, OS.XmCHARSET_TEXT, parseTable, tableLength, 0);
+ if (mnemonic != 0) {
+ byte [] buffer1 = Converter.wcsToMbcs(codePage, new char[]{mnemonic}, true);
+ data.xmMnemonic = OS.XmStringCreate (buffer1, OS.XmFONTLIST_DEFAULT_TAG);
+ } else {
+ data.xmMnemonic = 0;
+ }
+ data.text = string;
+ data.textWidth = data.textHeight = -1;
+ data.drawFlags = flags;
+}
+/**
+ * Sets the receiver's text anti-aliasing value to the parameter,
+ * which must be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code>
+ * or <code>SWT.ON</code>. Note that this controls anti-aliasing only
+ * for all <em>text drawing</em> operations.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param antialias the anti-aliasing setting
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter is not one of <code>SWT.DEFAULT</code>,
+ * <code>SWT.OFF</code> or <code>SWT.ON</code></li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see #getAdvanced
+ * @see #setAdvanced
+ * @see #setAntialias
+ *
+ * @since 3.1
+ */
+public void setTextAntialias(int antialias) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (data.cairo == 0 && antialias == SWT.DEFAULT) return;
+ int mode = 0;
+ switch (antialias) {
+ case SWT.DEFAULT: mode = Cairo.CAIRO_ANTIALIAS_DEFAULT; break;
+ case SWT.OFF: mode = Cairo.CAIRO_ANTIALIAS_NONE; break;
+ case SWT.ON: mode = Cairo.CAIRO_ANTIALIAS_GRAY;
+ break;
+ default:
+ SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ }
+ initCairo();
+ int /*long*/ options = Cairo.cairo_font_options_create();
+ Cairo.cairo_font_options_set_antialias(options, mode);
+ Cairo.cairo_set_font_options(data.cairo, options);
+ Cairo.cairo_font_options_destroy(options);
+}
+/**
+ * Sets the transform that is currently being used by the receiver. If
+ * the argument is <code>null</code>, the current transform is set to
+ * the identity transform.
+ * <p>
+ * This operation requires the operating system's advanced
+ * graphics subsystem which may not be available on some
+ * platforms.
+ * </p>
+ *
+ * @param transform the transform to set
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
+ * </ul>
+ *
+ * @see Transform
+ * @see #getAdvanced
+ * @see #setAdvanced
+ *
+ * @since 3.1
+ */
+public void setTransform(Transform transform) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (transform != null && transform.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+ if (data.cairo == 0 && transform == null) return;
+ initCairo();
+ int /*long*/ cairo = data.cairo;
+ if (transform != null) {
+ Cairo.cairo_set_matrix(cairo, transform.handle);
+ } else {
+ Cairo.cairo_identity_matrix(cairo);
+ }
+ data.state &= ~DRAW_OFFSET;
+}
+/**
+ * If the argument is <code>true</code>, puts the receiver
+ * in a drawing mode where the resulting color in the destination
+ * is the <em>exclusive or</em> of the color values in the source
+ * and the destination, and if the argument is <code>false</code>,
+ * puts the receiver in a drawing mode where the destination color
+ * is replaced with the source color value.
+ * <p>
+ * Note that this mode in fundamentally unsupportable on certain
+ * platforms, notably Carbon (Mac OS X). Clients that want their
+ * code to run on all platforms need to avoid this method.
+ * </p>
+ *
+ * @param xor if <code>true</code>, then <em>xor</em> mode is used, otherwise <em>source copy</em> mode is used
+ *
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @deprecated this functionality is not supported on some platforms
+ */
+public void setXORMode(boolean xor) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ OS.XSetFunction(data.display, handle, xor ? OS.GXxor : OS.GXcopy);
+}
+/**
+ * Returns the extent of the given string. No tab
+ * expansion or carriage return processing will be performed.
+ * <p>
+ * The <em>extent</em> of a string is the width and height of
+ * the rectangular area it would cover if drawn in a particular
+ * font (in this case, the current font in the receiver).
+ * </p>
+ *
+ * @param string the string to measure
+ * @return a point containing the extent of the string
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Point stringExtent(String string) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ checkGC(FONT);
+ byte[] buffer = Converter.wcsToMbcs(null, string, true);
+ cairo_font_extents_t font_extents = new cairo_font_extents_t();
+ Cairo.cairo_font_extents(cairo, font_extents);
+ cairo_text_extents_t extents = new cairo_text_extents_t();
+ Cairo.cairo_text_extents(cairo, buffer, extents);
+ return new Point((int)extents.width, (int)font_extents.height);
+ }
+ setString(string);
+ checkGC(FONT);
+ if (data.stringWidth != -1) return new Point(data.stringWidth, data.stringHeight);
+ int width, height;
+ if (string.length() == 0) {
+ width = 0;
+ height = getFontHeight();
+ } else {
+ int fontList = data.font.handle;
+ int xmString = data.xmString;
+ width = OS.XmStringWidth(fontList, xmString);
+ height = OS.XmStringHeight(fontList, xmString);
+ }
+ return new Point(data.stringWidth = width, data.stringHeight = height);
+}
+/**
+ * Returns the extent of the given string. Tab expansion and
+ * carriage return processing are performed.
+ * <p>
+ * The <em>extent</em> of a string is the width and height of
+ * the rectangular area it would cover if drawn in a particular
+ * font (in this case, the current font in the receiver).
+ * </p>
+ *
+ * @param string the string to measure
+ * @return a point containing the extent of the string
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Point textExtent(String string) {
+ return textExtent(string, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
+}
+/**
+ * Returns the extent of the given string. Tab expansion, line
+ * delimiter and mnemonic processing are performed according to
+ * the specified flags, which can be a combination of:
+ * <dl>
+ * <dt><b>DRAW_DELIMITER</b></dt>
+ * <dd>draw multiple lines</dd>
+ * <dt><b>DRAW_TAB</b></dt>
+ * <dd>expand tabs</dd>
+ * <dt><b>DRAW_MNEMONIC</b></dt>
+ * <dd>underline the mnemonic character</dd>
+ * <dt><b>DRAW_TRANSPARENT</b></dt>
+ * <dd>transparent background</dd>
+ * </dl>
+ * <p>
+ * The <em>extent</em> of a string is the width and height of
+ * the rectangular area it would cover if drawn in a particular
+ * font (in this case, the current font in the receiver).
+ * </p>
+ *
+ * @param string the string to measure
+ * @param flags the flags specifying how to process the text
+ * @return a point containing the extent of the string
+ *
+ * @exception IllegalArgumentException <ul>
+ * <li>ERROR_NULL_ARGUMENT - if the string is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Point textExtent(String string, int flags) {
+ if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
+ if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
+ int /*long*/ cairo = data.cairo;
+ if (cairo != 0) {
+ //TODO - honor flags
+ checkGC(FONT);
+ byte[] buffer = Converter.wcsToMbcs(null, string, true);
+ cairo_font_extents_t font_extents = new cairo_font_extents_t();
+ Cairo.cairo_font_extents(cairo, font_extents);
+ cairo_text_extents_t extents = new cairo_text_extents_t();
+ Cairo.cairo_text_extents(cairo, buffer, extents);
+ return new Point((int)extents.width, (int)font_extents.height);
+ }
+ setText(string, flags);
+ checkGC(FONT);
+ if (data.textWidth != -1) return new Point(data.textWidth, data.textHeight);
+ int width, height;
+ if (string.length() == 0) {
+ width = 0;
+ height = getFontHeight();
+ } else {
+ int fontList = data.font.handle;
+ int xmText = data.xmText;
+ width = OS.XmStringWidth(fontList, xmText);
+ height = OS.XmStringHeight(fontList, xmText);
+ }
+ return new Point(data.textWidth = width, data.textHeight = height);
+}
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the receiver
+ */
+public String toString () {
+ if (isDisposed()) return "GC {*DISPOSED*}";
+ return "GC {" + handle + "}";
+}
+}

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