# HG changeset patch
# User Anton Epple <toni.epple@eppleton.de>
# Date 1392212618 -3600
# Node ID 0726c97795243c76294cf25736c4dd0a7a3e472e
# Parent  6be5961e27ee1f5bab766c5a7186562b6dddba23
(Y05) Reintroduced the methods for using ImageData, since they?re already implemented and I have a very good usecase:
It?s useful for the tricks we need on mobile for fast application launch: Take a snapshot of the UI at application shutdown and display it on application start.

diff -r 6be5961e27ee -r 0726c9779524 javaquery/canvas/src/main/java/net/java/html/canvas/GraphicsContext.java
--- a/javaquery/canvas/src/main/java/net/java/html/canvas/GraphicsContext.java	Wed Feb 12 14:19:10 2014 +0100
+++ b/javaquery/canvas/src/main/java/net/java/html/canvas/GraphicsContext.java	Wed Feb 12 14:43:38 2014 +0100
@@ -672,25 +672,25 @@
         graphicsEnvironmentImpl.strokeText(text, x, y, maxWidth);
     }
 
-//    public ImageData createPixelMap(double x, double y) {
-//        return graphicsEnvironmentImpl.createPixelMap(x, y);
-//    }
-//
-//    public ImageData createPixelMap(ImageData pixelMap) {
-//        return graphicsEnvironmentImpl.createPixelMap(pixelMap);
-//    }
-//
-//    public ImageData getSnapshot(double x, double y, double width, double height) {
-//        return graphicsEnvironmentImpl.getPixelMap(x, y, width, height);
-//    }
-//
-//    public void drawPixelMap(ImageData pixelMap, double x, double y) {
-//        graphicsEnvironmentImpl.putPixelMap(pixelMap, x, y);
-//    }
-//
-//    public void drawPixelMap(ImageData pixelMap, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight) {
-//        graphicsEnvironmentImpl.putPixelMap(pixelMap, x, y, dirtyx, dirtyy, dirtywidth, dirtyheight);
-//    }
+    public ImageData createPixelMap(double x, double y) {
+        return graphicsEnvironmentImpl.createPixelMap(x, y);
+    }
+
+    public ImageData createPixelMap(ImageData pixelMap) {
+        return graphicsEnvironmentImpl.createPixelMap(pixelMap);
+    }
+
+    public ImageData getSnapshot(double x, double y, double width, double height) {
+        return graphicsEnvironmentImpl.getPixelMap(x, y, width, height);
+    }
+
+    public void drawPixelMap(ImageData pixelMap, double x, double y) {
+        graphicsEnvironmentImpl.putPixelMap(pixelMap, x, y);
+    }
+
+    public void drawPixelMap(ImageData pixelMap, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight) {
+        graphicsEnvironmentImpl.putPixelMap(pixelMap, x, y, dirtyx, dirtyy, dirtywidth, dirtyheight);
+    }
     /**
      * Sets the global alpha of the current state.
      *
diff -r 6be5961e27ee -r 0726c9779524 javaquery/canvas/src/main/java/net/java/html/canvas/spi/GraphicsEnvironment.java
--- a/javaquery/canvas/src/main/java/net/java/html/canvas/spi/GraphicsEnvironment.java	Wed Feb 12 14:19:10 2014 +0100
+++ b/javaquery/canvas/src/main/java/net/java/html/canvas/spi/GraphicsEnvironment.java	Wed Feb 12 14:43:38 2014 +0100
@@ -19,6 +19,7 @@
 
 import net.java.html.canvas.Dimension;
 import net.java.html.canvas.Image;
+import net.java.html.canvas.ImageData;
 import net.java.html.canvas.Style;
 
 /**
@@ -527,15 +528,51 @@
      */
     public void strokeText(String text, double x, double y, double maxWidth);
 
-//    public ImageData createPixelMap(double x, double y);
-//
-//    public ImageData createPixelMap(ImageData imageData);
-//
-//    public ImageData getPixelMap(double x, double y, double width, double height);
-//
-//    public void putPixelMap(ImageData imageData, double x, double y);
-//
-//    public void putPixelMap(ImageData imageData, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight);
+    /**
+     * Get a pixel array that you can manipulate, e.g. apply effects / transparency
+     * @param x width
+     * @param y height
+     * @return a PixelMap
+     */
+    public ImageData createPixelMap(double x, double y);
+
+    /**
+     * Create a new ImageData object with the same dimensions as the 
+     * object specified by imageData (this does not copy the image data)
+     * @param imageData
+     * @return 
+     */
+    public ImageData createPixelMap(ImageData imageData);
+
+    /**
+     * Get the pixels for a region of your GraphicsContext
+     * @param x start x coordinate
+     * @param y start y coordinate
+     * @param width width
+     * @param height height
+     * @return 
+     */
+    public ImageData getPixelMap(double x, double y, double width, double height);
+
+    /**
+     * Render an ImageData Object at the specified position
+     * @param imageData the Pixel array
+      * @param x start x coordinate
+     * @param y start y coordinate
+     */
+   public void putPixelMap(ImageData imageData, double x, double y);
+
+    /**
+     * Render an ImageData Object at the specified position
+     * @param imageData the Pixel array to draw
+     * @param x start x coordinate
+     * @param y start y coordinate
+     * @param dirtyx The horizontal (x) value, in pixels, where to place the image on the canvas
+     * @param dirtyy The vertical (y) value, in pixels, where to place the image on the canvas
+     * @param dirtywidth The width to use to draw the image on the canvas
+     * @param dirtyheight The height to use to draw the image on the canvas
+     */
+    public void putPixelMap(ImageData imageData, double x, double y, double dirtyx, double dirtyy, double dirtywidth, double dirtyheight);
     /**
      * Sets the global alpha of the current state.
      *