From 1a5e3c2d64be1c05a422fd78b23a31de155eca64 Mon Sep 17 00:00:00 2001
From: "alexanders@b2ef00c0-3703-41da-baef-cfe82387ac0c" <none@none>
Date: Wed, 3 Feb 2010 00:48:31 +0000
Subject: removed duplicate trunk directory

--HG--
extra : convert_revision : svn%3Ab2ef00c0-3703-41da-baef-cfe82387ac0c/trunk%404
---
 .../infrastructure/framework-src/modules/image.js  | 110 +++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 trunk/infrastructure/framework-src/modules/image.js

(limited to 'trunk/infrastructure/framework-src/modules/image.js')

diff --git a/trunk/infrastructure/framework-src/modules/image.js b/trunk/infrastructure/framework-src/modules/image.js
new file mode 100644
index 0000000..8aec74b
--- /dev/null
+++ b/trunk/infrastructure/framework-src/modules/image.js
@@ -0,0 +1,110 @@
+/**
+ * Copyright 2009 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import("blob");
+
+jimport("java.awt.image.BufferedImage");
+jimport("org.apache.sanselan.Sanselan");
+jimport("org.apache.sanselan.ImageFormat");
+
+if (java.lang.System.getProperty("java.awt.headless") == null) {
+  // If the system property isn't set either way, then default to "headless" mode,
+  // so that we don't start calling the window manager when the AWT classes
+  // are loaded.  For example, on OS X the java process is given a Dock icon
+  // when we create our first BufferedImage.
+  java.lang.System.setProperty("java.awt.headless", "true");
+}
+
+/**
+ * Encodes the given pixel data into an image blob, ready to be served to
+ * the client.  Pixels are specified as 32-bit ints in the format AARRGGBB,
+ * and the order is across rows first, then down columns.  If useTransparency
+ * is true, then all pixels should have an alpha channel as their
+ * most-significant byte, with 0xff being fully opaque.  If useTransparency
+ * is false, all pixels are fully opaque and the high byte is ignored.
+ * Supported formats: GIF.
+ * <p>
+ * For example, to create a GIF image consisting of a green pixel followed
+ * by a transparent pixel to the right of it, use:
+ * imageBlobFromPixels(2, 1, [0xff00ff00, 0x00000000], true, "gif")
+ */
+
+function pixelsToImageBlob(width, height, pixelArrayARGB, useTransparency, format) {
+  var image = _makeBufferedImage(width, height);
+  var array = _makePixelArray(width, height);
+  var alphaMask = (useTransparency ? 0x00000000 : 0xff000000);
+
+  for(var i=0; i<array.length; i++) {
+    // bitwise operations cause a JS number to become a signed 32-bit int
+    array[i] = (pixelArrayARGB[i] | alphaMask);
+  }
+
+  _setImagePixels(image, array);
+
+  if (format.toLowerCase() == "gif") {
+    return _bufferedImage2gifBlob(image);
+  }
+  return null;
+}
+
+/**
+ * Creates a blob of image data in a format readable by a web browser
+ * that consists of a solid, opaque color and has the given width
+ * and height.  The sixHexDigits must be a number, such as
+ * 0x12fda3, or a string, such as "12fda3".
+ */
+function solidColorImageBlob(width, height, sixHexDigits) {
+  var image = _makeBufferedImage(width, height);
+  var array = _makePixelArray(width, height);
+
+  var pixel = 0xffffff;
+  if ((typeof sixHexDigits) == "number") {
+    pixel = sixHexDigits;
+  }
+  else if ((typeof sixHexDigits) == "string") {
+    pixel = Number("0x"+sixHexDigits);
+  }
+
+  // bitwise operations cause a JS number to become a signed 32-bit int
+  pixel = ((pixel & 0xffffff) | 0xff000000);
+  
+  java.util.Arrays.fill(array, pixel);
+  _setImagePixels(image, array);
+  
+  return _bufferedImage2gifBlob(image);
+}
+
+function _makeBufferedImage(width, height) {
+  return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);  
+}
+
+function _makePixelArray(width, height) {
+  return java.lang.reflect.Array.newInstance(java.lang.Integer.TYPE,
+					     width*height);
+}
+
+function _setImagePixels(image, array) {
+  var width = image.getWidth();
+  var height = image.getHeight();
+
+  image.setRGB(0, 0, width, height, array, 0, width);
+}
+
+function _bufferedImage2gifBlob(image) {
+  // Use the Apache Sanselan image library because it nails transparent GIFs.
+  var bytes = Sanselan.writeImageToBytes(image, ImageFormat.IMAGE_FORMAT_GIF, null);
+  return blob.byteArrayToBlob("image/gif", bytes);
+}
-- 
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