Reorganize platform/graphics/android

Change-Id: Idc67155cfa99784dcd931e705336bfa063ecae46

1 files changed, 234 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/android/rendering/TransferQueue.h b/Source/WebCore/platform/graphics/android/rendering/TransferQueue.h
new file mode 100644
index 0000000..65ff116
--- /dev/null
+++ b/Source/WebCore/platform/graphics/android/rendering/TransferQueue.h
@@ -0,0 +1,234 @@
+/*
+ * 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 TransferQueue_h
+#define TransferQueue_h
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "GLUtils.h"
+#include "ShaderProgram.h"
+#include "SkBitmap.h"
+#include <utils/StrongPointer.h>
+#include <utils/threads.h>
+
+namespace WebCore {
+
+class Tile;
+class TileTexture;
+
+struct GLState {
+    GLint viewport[4];
+    GLboolean scissor[1];
+    GLboolean depth[1];
+    GLfloat clearColor[4];
+};
+
+
+// While in the queue, the Tile can be re-used, the updated bitmap
+// can be discarded. In order to track this obsolete base tiles, we save
+// the Tile's Info to make the comparison.
+// At the time of base tile's dtor or webview destroy, we want to discard
+// all the data in the queue. However, we have to do the Surface Texture
+// update in the same GL context as the UI thread. So we mark the status
+// as pendingDiscard, and delay the Surface Texture operation to the next
+// draw call.
+
+enum TransferItemStatus {
+    emptyItem = 0, // S.T. buffer ready for new content
+    pendingBlit = 1, // Ready for bliting into tile's GL Tex.
+    pendingDiscard = 2 // Waiting for the next draw call to discard
+};
+
+enum TextureUploadType {
+    CpuUpload = 0,
+    GpuUpload = 1
+};
+
+#define DEFAULT_UPLOAD_TYPE GpuUpload
+
+class TileTransferData {
+public:
+    TileTransferData()
+    : status(emptyItem)
+    , savedTilePtr(0)
+    , savedTileTexturePtr(0)
+    , uploadType(DEFAULT_UPLOAD_TYPE)
+    , bitmap(0)
+    , m_syncKHR(EGL_NO_SYNC_KHR)
+    {
+    }
+
+    ~TileTransferData()
+    {
+        // Bitmap will be created lazily, need to delete them at dtor.
+        delete bitmap;
+    }
+
+    TransferItemStatus status;
+    Tile* savedTilePtr;
+    TileTexture* savedTileTexturePtr;
+    IntRect invalRect;
+    TextureUploadType uploadType;
+    // This is only useful in Cpu upload code path, so it will be dynamically
+    // lazily allocated.
+    SkBitmap* bitmap;
+
+    // Specific data to the pure color tiles' queue.
+    Color pureColor;
+
+    // Sync object for GPU fence, this is the only the info passed from UI
+    // thread to Tex Gen thread. The reason of having this is due to the
+    // missing sync mechanism on Surface Texture on some vendor. b/5122031.
+    // Bascially the idea is that when UI thread utilize one buffer from
+    // the surface texture, we'll need to kick off the GPU commands, and only
+    // when those particular commands finish, we could write into this buffer
+    // again in Tex Gen thread.
+    EGLSyncKHR m_syncKHR;
+};
+
+class TransferQueue {
+public:
+    TransferQueue(bool useMinimalMem);
+    ~TransferQueue();
+
+    // This will be called by the browser through nativeSetProperty
+    void setTextureUploadType(TextureUploadType type);
+    void cleanupGLResources();
+    void updateDirtyTiles();
+
+    void initGLResources(int width, int height);
+
+    // insert the bitmap into the queue, mark the tile dirty if failing
+    void updateQueueWithBitmap(const TileRenderInfo* renderInfo,
+                               const SkBitmap& bitmap);
+
+    void addItemInTransferQueue(const TileRenderInfo* info,
+                                TextureUploadType type,
+                                const SkBitmap* bitmap);
+    // Check if the item @ index is ready for update.
+    // The lock will be done when returning true.
+    bool readyForUpdate();
+
+    void interruptTransferQueue(bool);
+
+    void lockQueue() { m_transferQueueItemLocks.lock(); }
+    void unlockQueue() { m_transferQueueItemLocks.unlock(); }
+
+    void addItemInPureColorQueue(const TileRenderInfo* renderInfo);
+
+    void setPendingDiscardWithLock();
+    void emptyQueue();
+
+    bool needsInit() { return !m_sharedSurfaceTextureId; }
+    // This queue can be accessed from UI and TexGen thread, therefore, we need
+    // a lock to protect its access
+    TileTransferData* m_transferQueue;
+
+    android::sp<ANativeWindow> m_ANW;
+
+    // EGL wrapper around m_ANW for use by the GaneshRenderer
+    EGLSurface m_eglSurface;
+
+private:
+    // return true if successfully inserted into queue
+    bool tryUpdateQueueWithBitmap(const TileRenderInfo* renderInfo,
+                                  const SkBitmap& bitmap);
+    bool getHasGLContext();
+    void setHasGLContext(bool hasContext);
+
+    int getNextTransferQueueIndex();
+
+    // Save and restore the GL State while switching from/to FBO.
+    void saveGLState();
+    void setGLStateForCopy(int width, int height);
+    void restoreGLState();
+
+    // Check the current transfer queue item is obsolete or not.
+    bool checkObsolete(const TileTransferData* data);
+
+    void setPendingDiscard();
+    // Before each draw call and the blit operation, clean up all the
+    // pendingDiscard items.
+    void cleanupPendingDiscard();
+
+    void blitTileFromQueue(GLuint fboID, TileTexture* destTex,
+                           TileTexture* frontTex,
+                           GLuint srcTexId, GLenum srcTexTarget,
+                           int index);
+
+    void addItemCommon(const TileRenderInfo* renderInfo,
+                       TextureUploadType type, TileTransferData* data);
+
+    void updatePureColorTiles();
+    // Note that the m_transferQueueIndex only changed in the TexGen thread
+    // where we are going to move on to update the next item in the queue.
+    int m_transferQueueIndex;
+
+    GLuint m_fboID; // The FBO used for copy the SurfTex to each tile
+
+    GLuint m_sharedSurfaceTextureId;
+
+    // GLContext can be lost when WebView destroyed.
+    bool m_hasGLContext;
+
+    GLState m_GLStateBeforeBlit;
+    android::sp<android::SurfaceTexture> m_sharedSurfaceTexture;
+
+    int m_emptyItemCount;
+
+    bool m_interruptedByRemovingOp;
+
+    // We are using wait/signal to handle our own queue sync.
+    // First of all, if we don't have our own lock, then while WebView is
+    // destroyed, the UI thread will wait for the Tex Gen to get out from
+    // dequeue operation, which will not succeed. B/c at this moment, we
+    // already lost the GL Context.
+    // Now we maintain a counter, which is m_emptyItemCount. When this reach
+    // 0, then we need the Tex Gen thread to wait. UI thread can signal this
+    // wait after calling updateTexImage at the draw call , or after WebView
+    // is destroyed.
+    android::Mutex m_transferQueueItemLocks;
+    android::Condition m_transferQueueItemCond;
+
+    EGLDisplay m_currentDisplay;
+
+    // This should be GpuUpload for production, but for debug purpose or working
+    // around driver/HW issue, we can set it to CpuUpload.
+    TextureUploadType m_currentUploadType;
+
+    // The non-pure-color tile are 1 to 1 mapping with Surface Texture which is
+    // resource limited. To get better performance, it is better to separate
+    // the pure color tile into another queue.
+    WTF::Vector<TileTransferData> m_pureColorTileQueue;
+
+    // The number of items transfer queue can buffer up.
+    int m_transferQueueSize;
+};
+
+} // namespace WebCore
+
+#endif // USE(ACCELERATED_COMPOSITING)
+#endif // TransferQueue_h