android_webview: changes to support Android GraphicBuffers

android_webview/public/browser/draw_gl.h

Index: android_webview/public/browser/draw_gl.h
diff --git a/android_webview/public/browser/draw_gl.h b/android_webview/public/browser/draw_gl.h
index 441793e2b57f6127c7b569430a2e39dcf7338640..a88a72c32015d3d695118e0a723b2e58172200eb 100644
--- a/android_webview/public/browser/draw_gl.h
+++ b/android_webview/public/browser/draw_gl.h
@@ -78,6 +78,32 @@ typedef void (AwDrawGLFunction)(int view_context,
                                 AwDrawGLInfo* draw_info,
                                 void* spare);
 
+// Called to create a GraphicBuffer
+typedef int AwCreateGraphicBufferFunction(int w, int h);
+// Called to release a GraphicBuffer
+typedef void AwReleaseGraphicBufferFunction(int buffer_id);
+// Called to lock a GraphicBuffer for reading
+typedef int AwLockForReadFunction(int buffer_id, void** vaddr);
+// Called to lock a GraphicBuffer for writing
+typedef int AwLockForWriteFunction(int buffer_id, void** vaddr);
+// Called to unlock a GraphicBuffer
+typedef int AwUnlockFunction(int buffer_id);
+// Called to get a native buffer pointer
+typedef void* AwGetNativeBufferFunction(int buffer_id);
+// Called to get the stride of the buffer
+typedef unsigned int AwGetStrideFunction(int buffer_id);
+
+// Set of functions used in rendering in hardware mode
+struct AwDrawGLFunctionTable {
+  AwCreateGraphicBufferFunction* create_graphic_buffer;
+  AwReleaseGraphicBufferFunction* release_graphic_buffer;
+  AwLockForReadFunction* lock_for_read;
+  AwLockForWriteFunction* lock_for_write;
+  AwUnlockFunction* unlock;
+  AwGetNativeBufferFunction* get_native_buffer;
+  AwGetStrideFunction* get_stride;
+};
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif