aw: Add and use DrawGL kModeSync

android_webview/public/browser/draw_gl.h

 // Copyright 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
 
+static const int kAwDrawGLInfoVersion = 1;
+
 // Holds the information required to trigger an OpenGL drawing operation.
 struct AwDrawGLInfo {
+  int version;  // The AwDrawGLInfo this struct was built with.

[hush (inactive), 2014/07/25 18:08:07]

where is the version set? I think you need to do that in frameworks/webview?

[boliu, 2014/07/25 18:11:02]

Yes

+
   // Input: tells the draw function what action to perform.
   enum Mode {
-    kModeDraw,
+    kModeDraw = 0,
     kModeProcess,
     kModeProcessNoContext,
     kModeSync,
   } mode;
 
   // Input: current clip rect in surface coordinates. Reflects the current state
   // of the OpenGL scissor rect. Both the OpenGL scissor rect and viewport are
   // set by the caller of the draw function and updated during View animations.
   int clip_left;
   int clip_top;
@@ skipping 63 matching lines @@
   AwUnmapFunction* unmap;
   AwGetNativeBufferFunction* get_native_buffer;
   AwGetStrideFunction* get_stride;
 };
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_GL_H_