Bug 493455 - manual tests

Note: transparent.png crashes SnippetDrawAlphaTwoPass

Change-Id: I62eb14b36b601fb2b2ddb0a046d7c8ee82648823
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.swt/+/190739
Tested-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-by: Andrey Loskutov <loskutov@gmx.de>

9 files changed, 236 insertions, 0 deletions

diff --git a/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlpha.java b/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlpha.java
new file mode 100644
index 0000000000..2570ba506e
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlpha.java
@@ -0,0 +1,98 @@
+package org.eclipse.swt.tests.manual;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Device;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.ImageLoader;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+
+public class SnippetDrawAlpha {
+	public static void main(String[] args) {
+		Display display = new Display();
+		Shell shell = new Shell(display);
+		shell.setLayout(new GridLayout(4, false));
+
+		createImageLabels(display, shell, "/eclipse16.png");
+		createImageLabels(display, shell, "/eclipse32.png");
+		createImageLabels(display, shell, "/pause.gif");
+		createImageLabels(display, shell, "/run.gif");
+		createImageLabels(display, shell, "/warning.gif");
+		createImageLabels(display, shell, "/transparent.png");
+
+		shell.pack();
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+
+	private static void createImageLabels(Display display, Shell shell, String fileName) {
+		createImageLabel(display, shell, fileName, -1);
+		createImageLabel(display, shell, fileName, 1);
+		createImageLabel(display, shell, fileName, 1.5f);
+		createImageLabel(display, shell, fileName, 2);
+	}
+
+	private static void createImageLabel(Display display, Shell shell, String fileName, float scaleFactor) {
+		ImageLoader loader = new ImageLoader();
+		loader.load(SnippetDrawAlpha.class.getResourceAsStream(fileName));
+		ImageData data = loader.data[0];
+		if (scaleFactor != -1) {
+			data = autoScaleImageData(display, data, scaleFactor);
+		}
+		Image image = new Image(display, data);
+		Label label = new Label(shell, SWT.NONE);
+		label.setImage(image);
+	}
+
+	private static ImageData autoScaleImageData(Device device, final ImageData imageData, float scaleFactor) {
+		int width = imageData.width;
+		int height = imageData.height;
+		int scaledWidth = Math.round(width * scaleFactor);
+		int scaledHeight = Math.round(height * scaleFactor);
+
+		Image original = new Image(device, imageData);
+
+		/* Create a 24 bit image data with alpha channel */
+		final ImageData resultData = new ImageData(scaledWidth, scaledHeight, 24,
+				new PaletteData(0xFF, 0xFF00, 0xFF0000));
+		resultData.alphaData = new byte[scaledWidth * scaledHeight];
+
+		/*
+		 * FIXME: something is wrong in SWT on win32. alphaData is apparently
+		 * not used in GC#drawImage(..) below, and images end up fully
+		 * transparent.
+		 */
+//		if ("win32".equals(SWT.getPlatform())) {
+//			// This hack makes the images at least visible, but loses all transparency:
+//			Arrays.fill (resultData.alphaData, (byte) 0xFF);
+//			// Makes the wrong non-transparent background white instead of black:
+//			Arrays.fill(resultData.data, (byte) 0xFF);
+//		}
+
+		Image resultImage = new Image(device, resultData);
+		GC gc = new GC(resultImage);
+		gc.setAntialias(SWT.ON);
+		gc.drawImage(original, 0, 0, width, height,
+				/*
+				 * E.g. destWidth here is effectively DPIUtil.autoScaleDown
+				 * (scaledWidth), but avoiding rounding errors. Nevertheless, we
+				 * still have some rounding errors due to the point-based API
+				 * GC#drawImage(..).
+				 */
+				0, 0, scaledWidth, scaledHeight);
+		gc.dispose();
+		original.dispose();
+		ImageData result = resultImage.getImageData();
+		resultImage.dispose();
+		return result;
+	}
+}
\ No newline at end of file
diff --git a/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlphaTwoPass.java b/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlphaTwoPass.java
new file mode 100644
index 0000000000..bd0e0373be
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/ManualTests/org/eclipse/swt/tests/manual/SnippetDrawAlphaTwoPass.java
@@ -0,0 +1,138 @@
+package org.eclipse.swt.tests.manual;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Device;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.ImageLoader;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+
+public class SnippetDrawAlphaTwoPass {
+
+	// Alpha and BW palette definitions from org.eclipse.ui.internal.decorators.DecorationImageBuilder
+	private static final PaletteData ALPHA_PALETTE, BW_PALETTE;
+
+	static {
+		RGB[] rgbs = new RGB[256];
+		for (int i = 0; i < rgbs.length; i++) {
+			rgbs[i] = new RGB(i, i, i);
+		}
+
+		ALPHA_PALETTE = new PaletteData(rgbs);
+		BW_PALETTE = new PaletteData(new RGB[] { new RGB(0, 0, 0), new RGB(255, 255, 255) });
+	}
+
+	public static void main(String[] args) {
+		Display display = new Display();
+		Shell shell = new Shell(display);
+		shell.setLayout(new GridLayout(4, false));
+
+		createImageLabels(display, shell, "/eclipse16.png");
+		createImageLabels(display, shell, "/eclipse32.png");
+		createImageLabels(display, shell, "/pause.gif");
+		createImageLabels(display, shell, "/run.gif");
+		createImageLabels(display, shell, "/warning.gif");
+		createImageLabels(display, shell, "/transparent.png");
+
+		shell.pack();
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+
+	private static void createImageLabels(Display display, Shell shell, String fileName) {
+		createImageLabel(display, shell, fileName, -1);
+		createImageLabel(display, shell, fileName, 1);
+		createImageLabel(display, shell, fileName, 1.5f);
+		createImageLabel(display, shell, fileName, 2);
+	}
+
+	private static void createImageLabel(Display display, Shell shell, String fileName, float scaleFactor) {
+		ImageLoader loader = new ImageLoader();
+		loader.load(SnippetDrawAlpha.class.getResourceAsStream(fileName));
+		ImageData data = loader.data[0];
+		if (scaleFactor != -1) {
+			data = autoScaleImageData(display, data, scaleFactor);
+		}
+		Image image = new Image(display, data);
+		Label label = new Label(shell, SWT.NONE);
+		label.setImage(image);
+	}
+
+	private static ImageData autoScaleImageData(Device device, final ImageData imageData, float scaleFactor) {
+		int width = imageData.width;
+		int height = imageData.height;
+		int scaledWidth = Math.round(width * scaleFactor);
+		int scaledHeight = Math.round(height * scaleFactor);
+
+		ImageData imageMaskData = null;
+
+		if (imageData.getTransparencyType() == SWT.TRANSPARENCY_ALPHA) {
+			imageMaskData = new ImageData(width, height, 8, ALPHA_PALETTE, imageData.scanlinePad, imageData.alphaData);
+		} else if (imageData.getTransparencyType() == SWT.TRANSPARENCY_PIXEL || imageData.getTransparencyType() == SWT.TRANSPARENCY_MASK) {
+			ImageData transparencyMaskData = imageData.getTransparencyMask();
+			imageMaskData = new ImageData(width, height, 1, BW_PALETTE, transparencyMaskData.scanlinePad, transparencyMaskData.data);
+		}
+
+		Image original = new Image(device, imageData);
+		Image originalMask = null;
+
+		if (imageMaskData != null) {
+			originalMask = new Image(device, imageMaskData);
+		}
+
+		/* Create a 24 bit image data with alpha channel */
+		ImageData resultData = new ImageData(scaledWidth, scaledHeight, 24, new PaletteData(0xFF, 0xFF00, 0xFF0000));
+		ImageData resultMaskData = null;
+
+		if (imageMaskData != null) {
+			resultMaskData = new ImageData(scaledWidth, scaledHeight, imageMaskData.depth, imageMaskData.palette);
+		}
+
+		Image result = new Image(device, resultData);
+		Image resultMask = null;
+
+		GC gc = new GC(result);
+		gc.setAntialias(SWT.ON);
+		gc.drawImage(original, 0, 0, width, height, 0, 0, scaledWidth, scaledHeight);
+		gc.dispose();
+
+		if (resultMaskData != null) {
+			resultMask = new Image(device, resultMaskData);
+			gc = new GC(resultMask);
+			gc.setAntialias(SWT.ON);
+			gc.drawImage(originalMask, 0, 0, width, height, 0, 0, scaledWidth, scaledHeight);
+			gc.dispose();
+		}
+
+		original.dispose();
+		originalMask.dispose();
+
+		ImageData scaledResult = result.getImageData();
+
+		if (resultMask != null) {
+			ImageData scaledResultMaskData = resultMask.getImageData();
+
+			// Convert 1-bit mask
+			if (scaledResultMaskData.depth == 1) {
+				scaledResult.maskPad = scaledResultMaskData.scanlinePad;
+				scaledResult.maskData = scaledResultMaskData.data;
+			} else {
+				scaledResult.alphaData = scaledResultMaskData.data;
+			}
+		}
+
+		result.dispose();
+		resultMask.dispose();
+		return scaledResult;
+	}
+}
\ No newline at end of file
diff --git a/tests/org.eclipse.swt.tests/data/eclipse.png b/tests/org.eclipse.swt.tests/data/eclipse.png
new file mode 100644
index 0000000000..73975241eb
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/eclipse.png
diff --git a/tests/org.eclipse.swt.tests/data/eclipse16.png b/tests/org.eclipse.swt.tests/data/eclipse16.png
new file mode 100644
index 0000000000..7fc69518a8
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/eclipse16.png
diff --git a/tests/org.eclipse.swt.tests/data/eclipse24.png b/tests/org.eclipse.swt.tests/data/eclipse24.png
new file mode 100644
index 0000000000..fbddd3cd78
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/eclipse24.png
diff --git a/tests/org.eclipse.swt.tests/data/eclipse32.png b/tests/org.eclipse.swt.tests/data/eclipse32.png
new file mode 100644
index 0000000000..bf85680075
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/eclipse32.png
diff --git a/tests/org.eclipse.swt.tests/data/pause.gif b/tests/org.eclipse.swt.tests/data/pause.gif
new file mode 100644
index 0000000000..161e3f594f
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/pause.gif
diff --git a/tests/org.eclipse.swt.tests/data/run.gif b/tests/org.eclipse.swt.tests/data/run.gif
new file mode 100644
index 0000000000..944a230aad
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/run.gif
diff --git a/tests/org.eclipse.swt.tests/data/warning.gif b/tests/org.eclipse.swt.tests/data/warning.gif
new file mode 100644
index 0000000000..cf4fdf93c7
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/warning.gif