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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Image.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Image.java | 1165 |
1 files changed, 1165 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Image.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Image.java new file mode 100644 index 0000000000..1754574694 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/Image.java @@ -0,0 +1,1165 @@ +/******************************************************************************* + * Copyright (c) 2000, 2008 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.gtk.*; +import org.eclipse.swt.*; + +import java.io.*; + +/** + * Instances of this class are graphics which have been prepared + * for display on a specific device. That is, they are ready + * to paint using methods such as <code>GC.drawImage()</code> + * and display on widgets with, for example, <code>Button.setImage()</code>. + * <p> + * If loaded from a file format that supports it, an + * <code>Image</code> may have transparency, meaning that certain + * pixels are specified as being transparent when drawn. Examples + * of file formats that support transparency are GIF and PNG. + * </p><p> + * There are two primary ways to use <code>Images</code>. + * The first is to load a graphic file from disk and create an + * <code>Image</code> from it. This is done using an <code>Image</code> + * constructor, for example: + * <pre> + * Image i = new Image(device, "C:\\graphic.bmp"); + * </pre> + * A graphic file may contain a color table specifying which + * colors the image was intended to possess. In the above example, + * these colors will be mapped to the closest available color in + * SWT. It is possible to get more control over the mapping of + * colors as the image is being created, using code of the form: + * <pre> + * ImageData data = new ImageData("C:\\graphic.bmp"); + * RGB[] rgbs = data.getRGBs(); + * // At this point, rgbs contains specifications of all + * // the colors contained within this image. You may + * // allocate as many of these colors as you wish by + * // using the Color constructor Color(RGB), then + * // create the image: + * Image i = new Image(device, data); + * </pre> + * <p> + * Applications which require even greater control over the image + * loading process should use the support provided in class + * <code>ImageLoader</code>. + * </p><p> + * Application code must explicitly invoke the <code>Image.dispose()</code> + * method to release the operating system resources managed by each instance + * when those instances are no longer required. + * </p> + * + * @see Color + * @see ImageData + * @see ImageLoader + * @see <a href="http://www.eclipse.org/swt/snippets/#image">Image snippets</a> + * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: GraphicsExample, ImageAnalyzer</a> + * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> + */ +public final class Image extends Resource implements Drawable { + + /** + * specifies whether the receiver is a bitmap or an icon + * (one of <code>SWT.BITMAP</code>, <code>SWT.ICON</code>) + * <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 type; + + /** + * The handle to the OS pixmap resource. + * (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 /*long*/ pixmap; + + /** + * The handle to the OS mask resource. + * (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 /*long*/ mask; + + int /*long*/ surface, surfaceData; + + /** + * specifies the transparent pixel + */ + int transparentPixel = -1; + + /** + * The GC the image is currently selected in. + */ + GC memGC; + + /** + * The alpha data of the image. + */ + byte[] alphaData; + + /** + * The global alpha value to be used for every pixel. + */ + int alpha = -1; + + /** + * The width of the image. + */ + int width = -1; + + /** + * The height of the image. + */ + int height = -1; + + /** + * Specifies the default scanline padding. + */ + static final int DEFAULT_SCANLINE_PAD = 4; + +Image(Device device) { + super(device); +} + +/** + * Constructs an empty instance of this class with the + * specified width and height. The result may be drawn upon + * by creating a GC and using any of its drawing operations, + * as shown in the following example: + * <pre> + * Image i = new Image(device, width, height); + * GC gc = new GC(i); + * gc.drawRectangle(0, 0, 50, 50); + * gc.dispose(); + * </pre> + * <p> + * Note: Some platforms may have a limitation on the size + * of image that can be created (size depends on width, height, + * and depth). For example, Windows 95, 98, and ME do not allow + * images larger than 16M. + * </p> + * + * @param device the device on which to create the image + * @param width the width of the new image + * @param height the height of the new image + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_INVALID_ARGUMENT - if either the width or height is negative or zero</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, int width, int height) { + super(device); + init(width, height); + init(); +} + +/** + * Constructs a new instance of this class based on the + * provided image, with an appearance that varies depending + * on the value of the flag. The possible flag values are: + * <dl> + * <dt><b>{@link SWT#IMAGE_COPY}</b></dt> + * <dd>the result is an identical copy of srcImage</dd> + * <dt><b>{@link SWT#IMAGE_DISABLE}</b></dt> + * <dd>the result is a copy of srcImage which has a <em>disabled</em> look</dd> + * <dt><b>{@link SWT#IMAGE_GRAY}</b></dt> + * <dd>the result is a copy of srcImage which has a <em>gray scale</em> look</dd> + * </dl> + * + * @param device the device on which to create the image + * @param srcImage the image to use as the source + * @param flag the style, either <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code> + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if srcImage is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the flag is not one of <code>IMAGE_COPY</code>, <code>IMAGE_DISABLE</code> or <code>IMAGE_GRAY</code></li> + * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon, or is otherwise in an invalid state</li> + * <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the image is not supported</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, Image srcImage, int flag) { + super(device); + if (srcImage == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (srcImage.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + switch (flag) { + case SWT.IMAGE_COPY: + case SWT.IMAGE_DISABLE: + case SWT.IMAGE_GRAY: + break; + default: + SWT.error(SWT.ERROR_INVALID_ARGUMENT); + } + device = this.device; + this.type = srcImage.type; + + /* Get source image size */ + int[] w = new int[1], h = new int[1]; + OS.gdk_drawable_get_size(srcImage.pixmap, w, h); + int width = w[0]; + int height = h[0]; + + /* Copy the mask */ + if ((srcImage.type == SWT.ICON && srcImage.mask != 0) || srcImage.transparentPixel != -1) { + /* Generate the mask if necessary. */ + if (srcImage.transparentPixel != -1) srcImage.createMask(); + int /*long*/ mask = OS.gdk_pixmap_new(0, width, height, 1); + if (mask == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ gdkGC = OS.gdk_gc_new(mask); + if (gdkGC == 0) SWT.error(SWT.ERROR_NO_HANDLES); + OS.gdk_draw_drawable(mask, gdkGC, srcImage.mask, 0, 0, 0, 0, width, height); + OS.g_object_unref(gdkGC); + this.mask = mask; + /* Destroy the image mask if the there is a GC created on the image */ + if (srcImage.transparentPixel != -1 && srcImage.memGC != null) srcImage.destroyMask(); + } + + /* Copy transparent pixel and alpha data */ + if (flag != SWT.IMAGE_DISABLE) transparentPixel = srcImage.transparentPixel; + alpha = srcImage.alpha; + if (srcImage.alphaData != null) { + alphaData = new byte[srcImage.alphaData.length]; + System.arraycopy(srcImage.alphaData, 0, alphaData, 0, alphaData.length); + } + createAlphaMask(width, height); + + /* Create the new pixmap */ + int /*long*/ pixmap = OS.gdk_pixmap_new (OS.GDK_ROOT_PARENT(), width, height, -1); + if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ gdkGC = OS.gdk_gc_new(pixmap); + if (gdkGC == 0) SWT.error(SWT.ERROR_NO_HANDLES); + this.pixmap = pixmap; + + if (flag == SWT.IMAGE_COPY) { + OS.gdk_draw_drawable(pixmap, gdkGC, srcImage.pixmap, 0, 0, 0, 0, width, height); + OS.g_object_unref(gdkGC); + } else { + + /* Retrieve the source pixmap data */ + int /*long*/ pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, width, height); + if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ colormap = OS.gdk_colormap_get_system(); + OS.gdk_pixbuf_get_from_drawable(pixbuf, srcImage.pixmap, colormap, 0, 0, 0, 0, width, height); + int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); + int /*long*/ pixels = OS.gdk_pixbuf_get_pixels(pixbuf); + + /* Apply transformation */ + switch (flag) { + case SWT.IMAGE_DISABLE: { + Color zeroColor = device.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW); + RGB zeroRGB = zeroColor.getRGB(); + byte zeroRed = (byte)zeroRGB.red; + byte zeroGreen = (byte)zeroRGB.green; + byte zeroBlue = (byte)zeroRGB.blue; + Color oneColor = device.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND); + RGB oneRGB = oneColor.getRGB(); + byte oneRed = (byte)oneRGB.red; + byte oneGreen = (byte)oneRGB.green; + byte oneBlue = (byte)oneRGB.blue; + byte[] line = new byte[stride]; + for (int y=0; y<height; y++) { + OS.memmove(line, pixels + (y * stride), stride); + for (int x=0; x<width; x++) { + int offset = x*3; + int red = line[offset] & 0xFF; + int green = line[offset+1] & 0xFF; + int blue = line[offset+2] & 0xFF; + int intensity = red * red + green * green + blue * blue; + if (intensity < 98304) { + line[offset] = zeroRed; + line[offset+1] = zeroGreen; + line[offset+2] = zeroBlue; + } else { + line[offset] = oneRed; + line[offset+1] = oneGreen; + line[offset+2] = oneBlue; + } + } + OS.memmove(pixels + (y * stride), line, stride); + } + break; + } + case SWT.IMAGE_GRAY: { + byte[] line = new byte[stride]; + for (int y=0; y<height; y++) { + OS.memmove(line, pixels + (y * stride), stride); + for (int x=0; x<width; x++) { + int offset = x*3; + int red = line[offset] & 0xFF; + int green = line[offset+1] & 0xFF; + int blue = line[offset+2] & 0xFF; + byte intensity = (byte)((red+red+green+green+green+green+green+blue) >> 3); + line[offset] = line[offset+1] = line[offset+2] = intensity; + } + OS.memmove(pixels + (y * stride), line, stride); + } + break; + } + } + + /* Copy data back to destination pixmap */ + OS.gdk_pixbuf_render_to_drawable(pixbuf, pixmap, gdkGC, 0, 0, 0, 0, width, height, OS.GDK_RGB_DITHER_NORMAL, 0, 0); + + /* Free resources */ + OS.g_object_unref(pixbuf); + OS.g_object_unref(gdkGC); + } + init(); +} + +/** + * Constructs an empty instance of this class with the + * width and height of the specified rectangle. The result + * may be drawn upon by creating a GC and using any of its + * drawing operations, as shown in the following example: + * <pre> + * Image i = new Image(device, boundsRectangle); + * GC gc = new GC(i); + * gc.drawRectangle(0, 0, 50, 50); + * gc.dispose(); + * </pre> + * <p> + * Note: Some platforms may have a limitation on the size + * of image that can be created (size depends on width, height, + * and depth). For example, Windows 95, 98, and ME do not allow + * images larger than 16M. + * </p> + * + * @param device the device on which to create the image + * @param bounds a rectangle specifying the image's width and height (must not be null) + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if the bounds rectangle is null</li> + * <li>ERROR_INVALID_ARGUMENT - if either the rectangle's width or height is negative</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, Rectangle bounds) { + super(device); + if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + init(bounds.width, bounds.height); + init(); +} + +/** + * Constructs an instance of this class from the given + * <code>ImageData</code>. + * + * @param device the device on which to create the image + * @param data the image data to create the image from (must not be null) + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if the image data is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_UNSUPPORTED_DEPTH - if the depth of the ImageData is not supported</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, ImageData data) { + super(device); + init(data); + init(); +} + +/** + * Constructs an instance of this class, whose type is + * <code>SWT.ICON</code>, from the two given <code>ImageData</code> + * objects. The two images must be the same size. Pixel transparency + * in either image will be ignored. + * <p> + * The mask image should contain white wherever the icon is to be visible, + * and black wherever the icon is to be transparent. In addition, + * the source image should contain black wherever the icon is to be + * transparent. + * </p> + * + * @param device the device on which to create the icon + * @param source the color data for the icon + * @param mask the mask data for the icon + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if either the source or mask is null </li> + * <li>ERROR_INVALID_ARGUMENT - if source and mask are different sizes</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, ImageData source, ImageData mask) { + super(device); + if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (mask == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (source.width != mask.width || source.height != mask.height) { + SWT.error(SWT.ERROR_INVALID_ARGUMENT); + } + mask = ImageData.convertMask (mask); + ImageData image = new ImageData(source.width, source.height, source.depth, source.palette, source.scanlinePad, source.data); + image.maskPad = mask.scanlinePad; + image.maskData = mask.data; + init(image); + init(); +} + +/** + * Constructs an instance of this class by loading its representation + * from the specified input stream. Throws an error if an error + * occurs while loading the image, or if the result is an image + * of an unsupported type. Application code is still responsible + * for closing the input stream. + * <p> + * This constructor is provided for convenience when loading a single + * image only. If the stream contains multiple images, only the first + * one will be loaded. To load multiple images, use + * <code>ImageLoader.load()</code>. + * </p><p> + * This constructor may be used to load a resource as follows: + * </p> + * <pre> + * static Image loadImage (Display display, Class clazz, String string) { + * InputStream stream = clazz.getResourceAsStream (string); + * if (stream == null) return null; + * Image image = null; + * try { + * image = new Image (display, stream); + * } catch (SWTException ex) { + * } finally { + * try { + * stream.close (); + * } catch (IOException ex) {} + * } + * return image; + * } + * </pre> + * + * @param device the device on which to create the image + * @param stream the input stream to load the image from + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if the stream is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_IO - if an IO error occurs while reading from the stream</li> + * <li>ERROR_INVALID_IMAGE - if the image stream contains invalid data </li> + * <li>ERROR_UNSUPPORTED_DEPTH - if the image stream describes an image with an unsupported depth</li> + * <li>ERROR_UNSUPPORTED_FORMAT - if the image stream contains an unrecognized format</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, InputStream stream) { + super(device); + init(new ImageData(stream)); + init(); +} + +/** + * Constructs an instance of this class by loading its representation + * from the file with the specified name. Throws an error if an error + * occurs while loading the image, or if the result is an image + * of an unsupported type. + * <p> + * This constructor is provided for convenience when loading + * a single image only. If the specified file contains + * multiple images, only the first one will be used. + * + * @param device the device on which to create the image + * @param filename the name of the file to load the image from + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> + * <li>ERROR_NULL_ARGUMENT - if the file name is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_IO - if an IO error occurs while reading from the file</li> + * <li>ERROR_INVALID_IMAGE - if the image file contains invalid data </li> + * <li>ERROR_UNSUPPORTED_DEPTH - if the image file describes an image with an unsupported depth</li> + * <li>ERROR_UNSUPPORTED_FORMAT - if the image file contains an unrecognized format</li> + * </ul> + * @exception SWTError <ul> + * <li>ERROR_NO_HANDLES if a handle could not be obtained for image creation</li> + * </ul> + */ +public Image(Device device, String filename) { + super(device); + if (filename == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + initNative(filename); + if (this.pixmap == 0) init(new ImageData(filename)); + init(); +} + +void initNative(String filename) { + try { + int length = filename.length (); + char [] chars = new char [length]; + filename.getChars (0, length, chars, 0); + byte [] buffer = Converter.wcsToMbcs(null, chars, true); + int /*long*/ pixbuf = OS.gdk_pixbuf_new_from_file(buffer, null); + if (pixbuf != 0) { + boolean hasAlpha = OS.gdk_pixbuf_get_has_alpha(pixbuf); + if (hasAlpha) { + /* + * Bug in GTK. Depending on the image (seems to affect images that have + * some degree of transparency all over the image), gdk_pixbuff_render_pixmap_and_mask() + * will return a corrupt pixmap. To avoid this, read in and store the alpha channel data + * for the image and then set it to 0xFF to prevent any possible corruption from + * gdk_pixbuff_render_pixmap_and_mask(). + */ + int width = OS.gdk_pixbuf_get_width(pixbuf); + int height = OS.gdk_pixbuf_get_height(pixbuf); + int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); + int /*long*/ pixels = OS.gdk_pixbuf_get_pixels(pixbuf); + byte[] line = new byte[stride]; + alphaData = new byte[width * height]; + for (int y = 0; y < height; y++) { + OS.memmove(line, pixels + (y * stride), stride); + for (int x = 0; x < width; x++) { + alphaData[y*width+x] = line[x*4 + 3]; + line[x*4 + 3] = (byte) 0xFF; + } + OS.memmove(pixels + (y * stride), line, stride); + } + createAlphaMask(width, height); + } + int /*long*/ [] pixmap_return = new int /*long*/ [1]; + OS.gdk_pixbuf_render_pixmap_and_mask(pixbuf, pixmap_return, null, 0); + this.type = SWT.BITMAP; + this.pixmap = pixmap_return[0]; + if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); + OS.g_object_unref (pixbuf); + } + } catch (SWTException e) {} +} + +void createAlphaMask (int width, int height) { + if (device.useXRender && (alpha != -1 || alphaData != null)) { + mask = OS.gdk_pixmap_new(0, alpha != -1 ? 1 : width, alpha != -1 ? 1 : height, 8); + if (mask == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ gc = OS.gdk_gc_new(mask); + if (alpha != -1) { + GdkColor color = new GdkColor(); + color.pixel = (alpha & 0xFF) << 8 | (alpha & 0xFF); + OS.gdk_gc_set_foreground(gc, color); + OS.gdk_draw_rectangle(mask, gc, 1, 0, 0, 1, 1); + } else { + int /*long*/ imagePtr = OS.gdk_drawable_get_image(mask, 0, 0, width, height); + if (imagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); + GdkImage gdkImage = new GdkImage(); + OS.memmove(gdkImage, imagePtr); + if (gdkImage.bpl == width) { + OS.memmove(gdkImage.mem, alphaData, alphaData.length); + } else { + byte[] line = new byte[gdkImage.bpl]; + for (int y = 0; y < height; y++) { + System.arraycopy(alphaData, width * y, line, 0, width); + OS.memmove(gdkImage.mem + (gdkImage.bpl * y), line, gdkImage.bpl); + } + } + OS.gdk_draw_image(mask, gc, imagePtr, 0, 0, 0, 0, width, height); + OS.g_object_unref(imagePtr); + } + OS.g_object_unref(gc); + } +} + +/** + * Create the receiver's mask if necessary. + */ +void createMask() { + if (mask != 0) return; + mask = createMask(getImageData(), false); + if (mask == 0) SWT.error(SWT.ERROR_NO_HANDLES); +} + +int /*long*/ createMask(ImageData image, boolean copy) { + ImageData mask = image.getTransparencyMask(); + byte[] data = mask.data; + byte[] maskData = copy ? new byte[data.length] : data; + for (int i = 0; i < maskData.length; i++) { + byte s = data[i]; + maskData[i] = (byte)(((s & 0x80) >> 7) | ((s & 0x40) >> 5) | + ((s & 0x20) >> 3) | ((s & 0x10) >> 1) | ((s & 0x08) << 1) | + ((s & 0x04) << 3) | ((s & 0x02) << 5) | ((s & 0x01) << 7)); + } + maskData = ImageData.convertPad(maskData, mask.width, mask.height, mask.depth, mask.scanlinePad, 1); + return OS.gdk_bitmap_create_from_data(0, maskData, mask.width, mask.height); +} + +void createSurface() { + if (surface != 0) return; + /* Generate the mask if necessary. */ + if (transparentPixel != -1) createMask(); + int[] w = new int[1], h = new int[1]; + OS.gdk_drawable_get_size(pixmap, w, h); + int width = w[0], height = h[0]; + if (mask != 0 || alpha != -1 || alphaData != null) { + int /*long*/ pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, true, 8, width, height); + if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ colormap = OS.gdk_colormap_get_system(); + OS.gdk_pixbuf_get_from_drawable(pixbuf, pixmap, colormap, 0, 0, 0, 0, width, height); + int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); + int /*long*/ pixels = OS.gdk_pixbuf_get_pixels(pixbuf); + byte[] line = new byte[stride]; + if (mask != 0 && OS.gdk_drawable_get_depth(mask) == 1) { + int /*long*/ maskPixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, width, height); + if (maskPixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); + OS.gdk_pixbuf_get_from_drawable(maskPixbuf, mask, 0, 0, 0, 0, 0, width, height); + int maskStride = OS.gdk_pixbuf_get_rowstride(maskPixbuf); + int /*long*/ maskPixels = OS.gdk_pixbuf_get_pixels(maskPixbuf); + byte[] maskLine = new byte[maskStride]; + int /*long*/ offset = pixels, maskOffset = maskPixels; + for (int y=0; y<height; y++) { + OS.memmove(line, offset, stride); + OS.memmove(maskLine, maskOffset, maskStride); + for (int x=0, offset1=0; x<width; x++, offset1 += 4) { + if (maskLine[x * 3] == 0) { + line[offset1 + 0] = line[offset1 + 1] = line[offset1 + 2] = line[offset1 + 3] = 0; + } + byte temp = line[offset1]; + line[offset1] = line[offset1 + 2]; + line[offset1 + 2] = temp; + } + OS.memmove(offset, line, stride); + offset += stride; + maskOffset += maskStride; + } + OS.g_object_unref(maskPixbuf); + } else if (alpha != -1) { + int /*long*/ offset = pixels; + for (int y=0; y<height; y++) { + OS.memmove(line, offset, stride); + for (int x=0, offset1=0; x<width; x++, offset1 += 4) { + line[offset1+3] = (byte)alpha; + /* pre-multiplied alpha */ + int r = ((line[offset1 + 0] & 0xFF) * alpha) + 128; + r = (r + (r >> 8)) >> 8; + int g = ((line[offset1 + 1] & 0xFF) * alpha) + 128; + g = (g + (g >> 8)) >> 8; + int b = ((line[offset1 + 2] & 0xFF) * alpha) + 128; + b = (b + (b >> 8)) >> 8; + line[offset1 + 0] = (byte)b; + line[offset1 + 1] = (byte)g; + line[offset1 + 2] = (byte)r; + } + OS.memmove(offset, line, stride); + offset += stride; + } + } else if (alphaData != null) { + int /*long*/ offset = pixels; + for (int y = 0; y < h [0]; y++) { + OS.memmove (line, offset, stride); + for (int x=0, offset1=0; x<width; x++, offset1 += 4) { + int alpha = alphaData [y*w [0]+x] & 0xFF; + line[offset1+3] = (byte)alpha; + /* pre-multiplied alpha */ + int r = ((line[offset1 + 0] & 0xFF) * alpha) + 128; + r = (r + (r >> 8)) >> 8; + int g = ((line[offset1 + 1] & 0xFF) * alpha) + 128; + g = (g + (g >> 8)) >> 8; + int b = ((line[offset1 + 2] & 0xFF) * alpha) + 128; + b = (b + (b >> 8)) >> 8; + line[offset1 + 0] = (byte)b; + line[offset1 + 1] = (byte)g; + line[offset1 + 2] = (byte)r; + } + OS.memmove (offset, line, stride); + offset += stride; + } + } else { + int /*long*/ offset = pixels; + for (int y = 0; y < h [0]; y++) { + OS.memmove (line, offset, stride); + for (int x=0, offset1=0; x<width; x++, offset1 += 4) { + line[offset1+3] = (byte)0xFF; + byte temp = line[offset1]; + line[offset1] = line[offset1 + 2]; + line[offset1 + 2] = temp; + } + OS.memmove (offset, line, stride); + offset += stride; + } + } + surfaceData = OS.g_malloc(stride * height); + OS.memmove(surfaceData, pixels, stride * height); + surface = Cairo.cairo_image_surface_create_for_data(surfaceData, Cairo.CAIRO_FORMAT_ARGB32, width, height, stride); + OS.g_object_unref(pixbuf); + } else { + int /*long*/ xDisplay = OS.GDK_DISPLAY(); + int /*long*/ xDrawable = OS.GDK_PIXMAP_XID(pixmap); + int /*long*/ xVisual = OS.gdk_x11_visual_get_xvisual(OS.gdk_visual_get_system()); + surface = Cairo.cairo_xlib_surface_create(xDisplay, xDrawable, xVisual, width, height); + } + /* Destroy the image mask if the there is a GC created on the image */ + if (transparentPixel != -1 && memGC != null) destroyMask(); +} + +/** + * Destroy the receiver's mask if it exists. + */ +void destroyMask() { + if (mask == 0) return; + OS.g_object_unref(mask); + mask = 0; +} + +void destroy() { + if (memGC != null) memGC.dispose(); + if (pixmap != 0) OS.g_object_unref(pixmap); + if (mask != 0) OS.g_object_unref(mask); + if (surface != 0) Cairo.cairo_surface_destroy(surface); + if (surfaceData != 0) OS.g_free(surfaceData); + surfaceData = surface = pixmap = mask = 0; + memGC = null; +} + +/** + * 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 Image)) return false; + Image image = (Image)object; + return device == image.device && pixmap == image.pixmap; +} + +/** + * Returns the color to which to map the transparent pixel, or null if + * the receiver has no transparent pixel. + * <p> + * There are certain uses of Images that do not support transparency + * (for example, setting an image into a button or label). In these cases, + * it may be desired to simulate transparency by using the background + * color of the widget to paint the transparent pixels of the image. + * Use this method to check which color will be used in these cases + * in place of transparency. This value may be set with setBackground(). + * <p> + * + * @return the background color of the image, or null if there is no transparency in the image + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * </ul> + */ +public Color getBackground() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (transparentPixel == -1) return null; + //NOT DONE + return null; +} + +/** + * Returns the bounds of the receiver. The rectangle will always + * have x and y values of 0, and the width and height of the + * image. + * + * @return a rectangle specifying the image's bounds + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li> + * </ul> + */ +public Rectangle getBounds() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (width != -1 && height != -1) { + return new Rectangle(0, 0, width, height); + } + int[] w = new int[1]; int[] h = new int[1]; + OS.gdk_drawable_get_size(pixmap, w, h); + return new Rectangle(0, 0, width = w[0], height = h[0]); +} + +/** + * Returns an <code>ImageData</code> based on the receiver + * Modifications made to this <code>ImageData</code> will not + * affect the Image. + * + * @return an <code>ImageData</code> containing the image's data and attributes + * + * @exception SWTException <ul> + * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_INVALID_IMAGE - if the image is not a bitmap or an icon</li> + * </ul> + * + * @see ImageData + */ +public ImageData getImageData() { + if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + + int[] w = new int[1], h = new int[1]; + OS.gdk_drawable_get_size(pixmap, w, h); + int width = w[0], height = h[0]; + int /*long*/ pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, width, height); + if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ colormap = OS.gdk_colormap_get_system(); + OS.gdk_pixbuf_get_from_drawable(pixbuf, pixmap, colormap, 0, 0, 0, 0, width, height); + int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); + int /*long*/ pixels = OS.gdk_pixbuf_get_pixels(pixbuf); + byte[] srcData = new byte[stride * height]; + OS.memmove(srcData, pixels, srcData.length); + OS.g_object_unref(pixbuf); + + PaletteData palette = new PaletteData(0xFF0000, 0xFF00, 0xFF); + ImageData data = new ImageData(width, height, 24, palette, 4, srcData); + data.bytesPerLine = stride; + + if (transparentPixel == -1 && type == SWT.ICON && mask != 0) { + /* Get the icon mask data */ + int /*long*/ gdkImagePtr = OS.gdk_drawable_get_image(mask, 0, 0, width, height); + if (gdkImagePtr == 0) SWT.error(SWT.ERROR_NO_HANDLES); + GdkImage gdkImage = new GdkImage(); + OS.memmove(gdkImage, gdkImagePtr); + byte[] maskData = new byte[gdkImage.bpl * gdkImage.height]; + OS.memmove(maskData, gdkImage.mem, maskData.length); + OS.g_object_unref(gdkImagePtr); + int maskPad; + for (maskPad = 1; maskPad < 128; maskPad++) { + int bpl = (((width + 7) / 8) + (maskPad - 1)) / maskPad * maskPad; + if (gdkImage.bpl == bpl) break; + } + /* Make mask scanline pad equals to 2 */ + data.maskPad = 2; + maskData = ImageData.convertPad(maskData, width, height, 1, maskPad, data.maskPad); + /* Bit swap the mask data if necessary */ + if (gdkImage.byte_order == OS.GDK_LSB_FIRST) { + for (int i = 0; i < maskData.length; i++) { + byte b = maskData[i]; + maskData[i] = (byte)(((b & 0x01) << 7) | ((b & 0x02) << 5) | + ((b & 0x04) << 3) | ((b & 0x08) << 1) | ((b & 0x10) >> 1) | + ((b & 0x20) >> 3) | ((b & 0x40) >> 5) | ((b & 0x80) >> 7)); + } + } + data.maskData = maskData; + } + data.transparentPixel = transparentPixel; + data.alpha = alpha; + if (alpha == -1 && alphaData != null) { + data.alphaData = new byte[alphaData.length]; + System.arraycopy(alphaData, 0, data.alphaData, 0, alphaData.length); + } + return data; +} + +/** + * Invokes platform specific functionality to allocate a new image. + * <p> + * <b>IMPORTANT:</b> This method is <em>not</em> part of the public + * API for <code>Image</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 device the device on which to allocate the color + * @param type the type of the image (<code>SWT.BITMAP</code> or <code>SWT.ICON</code>) + * @param pixmap the OS handle for the image + * @param mask the OS handle for the image mask + * + * @private + */ +public static Image gtk_new(Device device, int type, int /*long*/ pixmap, int /*long*/ mask) { + Image image = new Image(device); + image.type = type; + image.pixmap = pixmap; + image.mask = mask; + return image; +} + +/** + * 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 + * + * @see #equals + */ +public int hashCode () { + return (int)/*64*/pixmap; +} + +void init(int width, int height) { + if (width <= 0 || height <= 0) { + SWT.error (SWT.ERROR_INVALID_ARGUMENT); + } + this.type = SWT.BITMAP; + + /* Create the pixmap */ + this.pixmap = OS.gdk_pixmap_new(OS.GDK_ROOT_PARENT(), width, height, -1); + if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); + /* Fill the bitmap with white */ + GdkColor white = new GdkColor(); + white.red = (short)0xFFFF; + white.green = (short)0xFFFF; + white.blue = (short)0xFFFF; + int /*long*/ colormap = OS.gdk_colormap_get_system(); + OS.gdk_colormap_alloc_color(colormap, white, true, true); + int /*long*/ gdkGC = OS.gdk_gc_new(pixmap); + OS.gdk_gc_set_foreground(gdkGC, white); + OS.gdk_draw_rectangle(pixmap, gdkGC, 1, 0, 0, width, height); + OS.g_object_unref(gdkGC); + OS.gdk_colormap_free_colors(colormap, white, 1); +} + +void init(ImageData image) { + if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + int width = image.width; + int height = image.height; + PaletteData palette = image.palette; + if (!(((image.depth == 1 || image.depth == 2 || image.depth == 4 || image.depth == 8) && !palette.isDirect) || + ((image.depth == 8) || (image.depth == 16 || image.depth == 24 || image.depth == 32) && palette.isDirect))) + SWT.error (SWT.ERROR_UNSUPPORTED_DEPTH); + int /*long*/ pixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, width, height); + if (pixbuf == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int stride = OS.gdk_pixbuf_get_rowstride(pixbuf); + int /*long*/ data = OS.gdk_pixbuf_get_pixels(pixbuf); + byte[] buffer = image.data; + if (!palette.isDirect || image.depth != 24 || stride != image.bytesPerLine || palette.redMask != 0xFF0000 || palette.greenMask != 0xFF00 || palette.blueMask != 0xFF) { + buffer = new byte[stride * height]; + if (palette.isDirect) { + ImageData.blit(ImageData.BLIT_SRC, + image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, palette.redMask, palette.greenMask, palette.blueMask, + ImageData.ALPHA_OPAQUE, null, 0, 0, 0, + buffer, 24, stride, ImageData.MSB_FIRST, 0, 0, width, height, 0xFF0000, 0xFF00, 0xFF, + false, false); + } else { + RGB[] rgbs = palette.getRGBs(); + int length = rgbs.length; + byte[] srcReds = new byte[length]; + byte[] srcGreens = new byte[length]; + byte[] srcBlues = new byte[length]; + for (int i = 0; i < rgbs.length; i++) { + RGB rgb = rgbs[i]; + if (rgb == null) continue; + srcReds[i] = (byte)rgb.red; + srcGreens[i] = (byte)rgb.green; + srcBlues[i] = (byte)rgb.blue; + } + ImageData.blit(ImageData.BLIT_SRC, + image.data, image.depth, image.bytesPerLine, image.getByteOrder(), 0, 0, width, height, srcReds, srcGreens, srcBlues, + ImageData.ALPHA_OPAQUE, null, 0, 0, 0, + buffer, 24, stride, ImageData.MSB_FIRST, 0, 0, width, height, 0xFF0000, 0xFF00, 0xFF, + false, false); + } + } + OS.memmove(data, buffer, stride * height); + int /*long*/ pixmap = OS.gdk_pixmap_new (OS.GDK_ROOT_PARENT(), width, height, -1); + if (pixmap == 0) SWT.error(SWT.ERROR_NO_HANDLES); + int /*long*/ gdkGC = OS.gdk_gc_new(pixmap); + if (gdkGC == 0) SWT.error(SWT.ERROR_NO_HANDLES); + OS.gdk_pixbuf_render_to_drawable(pixbuf, pixmap, gdkGC, 0, 0, 0, 0, width, height, OS.GDK_RGB_DITHER_NORMAL, 0, 0); + OS.g_object_unref(gdkGC); + OS.g_object_unref(pixbuf); + + boolean isIcon = image.getTransparencyType() == SWT.TRANSPARENCY_MASK; + if (isIcon || image.transparentPixel != -1) { + if (image.transparentPixel != -1) { + RGB rgb = null; + if (palette.isDirect) { + rgb = palette.getRGB(image.transparentPixel); + } else { + if (image.transparentPixel < palette.colors.length) { + rgb = palette.getRGB(image.transparentPixel); + } + } + if (rgb != null) { + transparentPixel = rgb.red << 16 | rgb.green << 8 | rgb.blue; + } + } + int /*long*/ mask = createMask(image, isIcon); + if (mask == 0) SWT.error(SWT.ERROR_NO_HANDLES); + this.mask = mask; + if (isIcon) { + this.type = SWT.ICON; + } else { + this.type = SWT.BITMAP; + } + } else { + this.type = SWT.BITMAP; + this.mask = 0; + this.alpha = image.alpha; + if (image.alpha == -1 && image.alphaData != null) { + this.alphaData = new byte[image.alphaData.length]; + System.arraycopy(image.alphaData, 0, this.alphaData, 0, alphaData.length); + } + createAlphaMask(width, height); + } + this.pixmap = pixmap; +} + +/** + * Invokes platform specific functionality to allocate a new GC handle. + * <p> + * <b>IMPORTANT:</b> This method is <em>not</em> part of the public + * API for <code>Image</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 data the platform specific GC data + * @return the platform specific GC handle + */ +public int /*long*/ internal_new_GC (GCData data) { + if (pixmap == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (type != SWT.BITMAP || memGC != null) { + SWT.error(SWT.ERROR_INVALID_ARGUMENT); + } + int /*long*/ gdkGC = OS.gdk_gc_new(pixmap); + if (data != null) { + int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT; + if ((data.style & mask) == 0) { + data.style |= SWT.LEFT_TO_RIGHT; + } else { + if ((data.style & SWT.RIGHT_TO_LEFT) != 0) { + data.style |= SWT.MIRRORED; + } + } + data.device = device; + data.drawable = pixmap; + data.background = device.COLOR_WHITE.handle; + data.foreground = device.COLOR_BLACK.handle; + data.font = device.systemFont; + data.image = this; + } + return gdkGC; +} + +/** + * Invokes platform specific functionality to dispose a GC handle. + * <p> + * <b>IMPORTANT:</b> This method is <em>not</em> part of the public + * API for <code>Image</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 hDC the platform specific GC handle + * @param data the platform specific GC data + */ +public void internal_dispose_GC (int /*long*/ gdkGC, GCData data) { + OS.g_object_unref(gdkGC); +} + +/** + * Returns <code>true</code> if the image has been disposed, + * and <code>false</code> otherwise. + * <p> + * This method gets the dispose state for the image. + * When an image has been disposed, it is an error to + * invoke any other method using the image. + * + * @return <code>true</code> when the image is disposed and <code>false</code> otherwise + */ +public boolean isDisposed() { + return pixmap == 0; +} + +/** + * Sets the color to which to map the transparent pixel. + * <p> + * There are certain uses of <code>Images</code> that do not support + * transparency (for example, setting an image into a button or label). + * In these cases, it may be desired to simulate transparency by using + * the background color of the widget to paint the transparent pixels + * of the image. This method specifies the color that will be used in + * these cases. For example: + * <pre> + * Button b = new Button(); + * image.setBackground(b.getBackground()); + * b.setImage(image); + * </pre> + * </p><p> + * The image may be modified by this operation (in effect, the + * transparent regions may be filled with the supplied color). Hence + * this operation is not reversible and it is not legal to call + * this function twice or with a null argument. + * </p><p> + * This method has no effect if the receiver does not have a transparent + * pixel value. + * </p> + * + * @param color the color to use when a transparent pixel is specified + * + * @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 (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED); + if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + if (transparentPixel == -1) return; + //NOT DONE +} + +/** + * 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 "Image {*DISPOSED*}"; + return "Image {" + pixmap + "}"; +} + +} |