Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.ui / src / org / simantics / utils / ui / gfx / AlphaAdjustmentImageDescriptor.java

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/AlphaAdjustmentImageDescriptor.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/AlphaAdjustmentImageDescriptor.java
new file mode 100644 (file)
index 0000000..104dd88
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/AlphaAdjustmentImageDescriptor.java
@@ -0,0 +1,102 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+/*\r
+ * 22.12.2006\r
+ */\r
+package org.simantics.utils.ui.gfx;\r
+\r
+import org.eclipse.jface.resource.ImageDescriptor;\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.graphics.ImageData;\r
+\r
+/**\r
+ * AlphaAdjustmentImageDescriptor multiplies alpha by (adjustment value/256)\r
+ * <p>\r
+ * Usage:\r
+ * ImageDescriptor icon;\r
+ * icon = AlphaAdjustmentImageDescriptor.adjustAlpha(icon, 128);\r
+ * \r
+ * @author Toni Kalajainen\r
+ */\r
+public class AlphaAdjustmentImageDescriptor extends ImageDescriptor {\r
+    \r
+    public static ImageDescriptor adjustAlpha(ImageDescriptor desc, int alphaAdjustment)\r
+    {\r
+        if (alphaAdjustment==256) return desc;\r
+        return new AlphaAdjustmentImageDescriptor(desc, alphaAdjustment);\r
+    }\r
+    \r
+    int alphaAdjustment;\r
+    ImageDescriptor desc;\r
+    \r
+    /**\r
+     * \r
+     * @param original\r
+     * @param alphaAdjustment 0..256\r
+     */\r
+    public AlphaAdjustmentImageDescriptor(ImageDescriptor original, int alphaAdjustment)\r
+    {\r
+        assert(alphaAdjustment>=0 && alphaAdjustment<=256);\r
+        assert(original!=null);\r
+        this.alphaAdjustment = alphaAdjustment;\r
+        this.desc = original;\r
+    }\r
+\r
+    @SuppressWarnings("deprecation")\r
+    @Override\r
+    public ImageData getImageData() {\r
+        ImageData orig = ImageCache.getInstance().getImage(desc).getImageData();\r
+        ImageData id = new ImageData(orig.width, orig.height, orig.depth, orig.palette);\r
+        id.setAlpha(0,0,0);\r
+        \r
+        if (orig.getTransparencyType()==SWT.TRANSPARENCY_ALPHA ||\r
+            orig.getTransparencyType()==SWT.TRANSPARENCY_NONE)\r
+        {\r
+            for (int x=0; x<orig.width; x++)\r
+                for (int y=0; y<orig.height; y++) {\r
+                    id.setPixel(x, y, orig.getPixel(x, y));\r
+                    int alpha = (orig.getAlpha(x, y) * alphaAdjustment) >> 8;\r
+                    id.setAlpha(x, y, alpha);\r
+                }\r
+        } else\r
+        if (orig.getTransparencyType()==SWT.TRANSPARENCY_MASK ||\r
+            orig.getTransparencyType()==SWT.TRANSPARENCY_PIXEL) {\r
+            ImageData mask = orig.getTransparencyMask();\r
+            for (int x=0; x<orig.width; x++)\r
+                for (int y=0; y<orig.height; y++) {\r
+                    id.setPixel(x, y, orig.getPixel(x, y));\r
+                    int alpha = (mask.getPixel(x, y)==1?alphaAdjustment:0);\r
+                    id.setAlpha(x, y, alpha);\r
+                }\r
+        }\r
+        \r
+        return id;\r
+    }\r
+    \r
+    @Override\r
+    public boolean equals(Object obj) {\r
+        if (!(obj instanceof AlphaAdjustmentImageDescriptor))\r
+            return false;\r
+        AlphaAdjustmentImageDescriptor other = (AlphaAdjustmentImageDescriptor) obj;\r
+        if (!other.desc.equals(desc))\r
+            return false;\r
+        if (other.alphaAdjustment!=alphaAdjustment)\r
+            return false;\r
+        return true;\r
+    }\r
+    \r
+    @Override\r
+    public int hashCode() {\r
+        return desc.hashCode() ^ 0x58fb2 ^ alphaAdjustment;\r
+    }\r
+\r
+}\r