android_webview: changes to support Android GraphicBuffers

android_webview/public/browser/draw_gl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_
 #define ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_
 
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ skipping 60 matching lines @@
 // Function to invoke a direct GL draw into the client's pre-configured
 // GL context. Obtained via AwContents.getDrawGLFunction() (static).
 // |view_context| is an opaque identifier that was returned by the corresponding
 // call to AwContents.getAwDrawGLViewContext().
 // |draw_info| carries the in and out parameters for this draw.
 // |spare| ignored; pass NULL.
 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
 
 #endif  // ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_