Reorganize platform/graphics/android

Change-Id: Idc67155cfa99784dcd931e705336bfa063ecae46

1 files changed, 110 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/android/rendering/ImageTexture.h b/Source/WebCore/platform/graphics/android/rendering/ImageTexture.h
new file mode 100644
index 0000000..34430f1
--- /dev/null
+++ b/Source/WebCore/platform/graphics/android/rendering/ImageTexture.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2011, The Android Open Source Project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ImageTexture_h
+#define ImageTexture_h
+
+#include "GLUtils.h"
+#include "SkBitmap.h"
+#include "SkBitmapRef.h"
+#include "SkPicture.h"
+#include "SkRefCnt.h"
+#include "TilePainter.h"
+
+namespace WebCore {
+
+class GLWebViewState;
+class LayerAndroid;
+class TexturesResult;
+class TileGrid;
+
+/////////////////////////////////////////////////////////////////////////////////
+// Image sharing codepath for layers
+/////////////////////////////////////////////////////////////////////////////////
+//
+// Layers containing only an image take a slightly different codepath;
+// GraphicsLayer::setContentsToImage() is called on the webcore thread,
+// passing an Image instance. We get the native image (an SkBitmap) and create
+// an ImageTexture instance with it (or increment the refcount of an existing
+// instance if the SkBitmap is similar to one already stored in ImagesManager,
+// i.e. if two GraphicsLayer share the same image).
+//
+// To detect if an image is similar, we compute and use a CRC. Each ImageTexture
+// is stored in ImagesManager using its CRC as a hash key.
+// Simply comparing the address is not enough -- different image could end up
+// at the same address (i.e. the image is deallocated then a new one is
+// reallocated at the old address)
+//
+// Each ImageTexture's CRC being unique, LayerAndroid instances simply store that
+// and retain/release the corresponding ImageTexture (so that
+// queued painting request will work correctly and not crash...).
+// LayerAndroid running on the UI thread will get the corresponding
+// ImageTexture at draw time.
+//
+// ImageTexture recopy the original SkBitmap so that they can safely be used
+// on a different thread; it uses TileGrid to allocate and paint the image,
+// so that we can share the same textures and limits as the rest of the layers.
+//
+/////////////////////////////////////////////////////////////////////////////////
+class ImageTexture : public TilePainter {
+public:
+    ImageTexture(SkBitmap* bmp, unsigned crc);
+    virtual ~ImageTexture();
+
+    bool prepareGL(GLWebViewState*);
+    void drawGL(LayerAndroid* layer, float opacity);
+    void drawCanvas(SkCanvas*, SkRect&);
+    bool hasContentToShow();
+    SkBitmap* bitmap() { return m_image; }
+    unsigned imageCRC() { return m_crc; }
+
+    static SkBitmap* convertBitmap(SkBitmap* bitmap);
+
+    static unsigned computeCRC(const SkBitmap* bitmap);
+    bool equalsCRC(unsigned crc);
+
+    // methods used by TileGrid
+    virtual bool paint(Tile* tile, SkCanvas* canvas);
+    virtual float opacity();
+
+    int nbTextures();
+
+    virtual SurfaceType type() { return TilePainter::Image; }
+
+private:
+    const TransformationMatrix* transform();
+
+    SkBitmapRef* m_imageRef;
+    SkBitmap* m_image;
+    TileGrid* m_texture;
+    LayerAndroid* m_layer;
+    SkPicture* m_picture;
+    TransformationMatrix m_layerMatrix;
+    unsigned m_crc;
+};
+
+} // namespace WebCore
+
+#endif // ImageTexture