1 files changed, 83 insertions, 0 deletions
diff --git a/android/source/src/java/org/mozilla/gecko/gfx/BufferedCairoImage.java b/android/source/src/java/org/mozilla/gecko/gfx/BufferedCairoImage.java
new file mode 100644
index 000000000..a616fcc4d
--- /dev/null
+++ b/android/source/src/java/org/mozilla/gecko/gfx/BufferedCairoImage.java
@@ -0,0 +1,83 @@
+/* -*- 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 android.graphics.Bitmap;
+import android.util.Log;
+
+import org.libreoffice.kit.DirectBufferAllocator;
+
+import java.nio.ByteBuffer;
+
+/**
+ * A Cairo image that simply saves a buffer of pixel data.
+ */
+public class BufferedCairoImage extends CairoImage {
+    private static String LOGTAG = "GeckoBufferedCairoImage";
+    private ByteBuffer mBuffer;
+    private IntSize mSize;
+    private int mFormat;
+
+    /**
+     * Creates a buffered Cairo image from a byte buffer.
+     */
+    public BufferedCairoImage(ByteBuffer inBuffer, int inWidth, int inHeight, int inFormat) {
+        setBuffer(inBuffer, inWidth, inHeight, inFormat);
+    }
+
+    /**
+     * Creates a buffered Cairo image from an Android bitmap.
+     */
+    public BufferedCairoImage(Bitmap bitmap) {
+        setBitmap(bitmap);
+    }
+
+    private synchronized void freeBuffer() {
+        mBuffer = DirectBufferAllocator.free(mBuffer);
+    }
+
+    @Override
+    public void destroy() {
+        try {
+            freeBuffer();
+        } catch (Exception ex) {
+            Log.e(LOGTAG, "error clearing buffer: ", ex);
+        }
+    }
+
+    @Override
+    public ByteBuffer getBuffer() {
+        return mBuffer;
+    }
+
+    @Override
+    public IntSize getSize() {
+        return mSize;
+    }
+
+    @Override
+    public int getFormat() {
+        return mFormat;
+    }
+
+
+    public void setBuffer(ByteBuffer buffer, int width, int height, int format) {
+        freeBuffer();
+        mBuffer = buffer;
+        mSize = new IntSize(width, height);
+        mFormat = format;
+    }
+
+    public void setBitmap(Bitmap bitmap) {
+        mFormat = CairoUtils.bitmapConfigToCairoFormat(bitmap.getConfig());
+        mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
+
+        int bpp = CairoUtils.bitsPerPixelForCairoFormat(mFormat) / 8;
+        mBuffer = DirectBufferAllocator.allocate(mSize.getArea() * bpp);
+        bitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
+    }
+}