1 files changed, 94 insertions, 0 deletions
diff --git a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/gfx/BufferedImage.java b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/gfx/BufferedImage.java
new file mode 100644
index 000000000..4dbcf61bb
--- /dev/null
+++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/gfx/BufferedImage.java
@@ -0,0 +1,94 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.gfx;
+
+import org.mozilla.gecko.mozglue.DirectBufferAllocator;
+
+import android.graphics.Bitmap;
+import android.util.Log;
+
+import java.nio.ByteBuffer;
+
+/** A buffered image that simply saves a buffer of pixel data. */
+public class BufferedImage {
+    private ByteBuffer mBuffer;
+    private Bitmap mBitmap;
+    private IntSize mSize;
+    private int mFormat;
+
+    private static final String LOGTAG = "GeckoBufferedImage";
+
+    /** Creates an empty buffered image */
+    public BufferedImage() {
+        mSize = new IntSize(0, 0);
+    }
+
+    /** Creates a buffered image from an Android bitmap. */
+    public BufferedImage(Bitmap bitmap) {
+        mFormat = bitmapConfigToFormat(bitmap.getConfig());
+        mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
+        mBitmap = bitmap;
+    }
+
+    private synchronized void freeBuffer() {
+        if (mBuffer != null) {
+            mBuffer = DirectBufferAllocator.free(mBuffer);
+        }
+    }
+
+    public void destroy() {
+        try {
+            freeBuffer();
+        } catch (Exception ex) {
+            Log.e(LOGTAG, "error clearing buffer: ", ex);
+        }
+    }
+
+    public ByteBuffer getBuffer() {
+        if (mBuffer == null) {
+            int bpp = bitsPerPixelForFormat(mFormat);
+            mBuffer = DirectBufferAllocator.allocate(mSize.getArea() * bpp);
+            mBitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
+            mBitmap = null;
+        }
+        return mBuffer;
+    }
+
+    public IntSize getSize() { return mSize; }
+    public int getFormat() { return mFormat; }
+
+    public static final int FORMAT_INVALID = -1;
+    public static final int FORMAT_ARGB32 = 0;
+    public static final int FORMAT_RGB24 = 1;
+    public static final int FORMAT_A8 = 2;
+    public static final int FORMAT_A1 = 3;
+    public static final int FORMAT_RGB16_565 = 4;
+
+    private static int bitsPerPixelForFormat(int format) {
+        switch (format) {
+        case FORMAT_A1:          return 1;
+        case FORMAT_A8:          return 8;
+        case FORMAT_RGB16_565:   return 16;
+        case FORMAT_RGB24:       return 24;
+        case FORMAT_ARGB32:      return 32;
+        default:
+            throw new RuntimeException("Unknown Cairo format");
+        }
+    }
+
+    private static int bitmapConfigToFormat(Bitmap.Config config) {
+        if (config == null)
+            return FORMAT_ARGB32;    /* Droid Pro fix. */
+
+        switch (config) {
+        case ALPHA_8:   return FORMAT_A8;
+        case ARGB_4444: throw new RuntimeException("ARGB_444 unsupported");
+        case ARGB_8888: return FORMAT_ARGB32;
+        case RGB_565:   return FORMAT_RGB16_565;
+        default:        throw new RuntimeException("Unknown Skia bitmap config");
+        }
+    }
+}