[Android] Introduce the information required in WebView to trigger GL…

… drawing operations.

BUG=none


Review URL: https://chromiumcodereview.appspot.com/11368032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@165674 0039d316-1c4b-4281-b951-d872f2087c98

android_webview/android_webview.gyp

@@ -77,6 +77,7 @@
         'lib/main/aw_main_delegate.cc',
         'lib/main/aw_main_delegate.h',
         'lib/main/webview_entry_point.cc',
+        'public/browser/gl_draw.h',
         'renderer/aw_content_renderer_client.cc',
         'renderer/aw_content_renderer_client.h',
         'renderer/aw_render_process_observer.cc',

android_webview/public/browser/gl_draw.h

@@ -0,0 +1,52 @@
+// 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_GL_DRAW_H_
+#define ANDROID_WEBVIEW_PUBLIC_BROWSER_GL_DRAW_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Holds the information required to trigger an OpenGL drawing operation.
+struct AwGLDrawInfo {
+
+  // Input: current clip rect.
+  int clip_left;
+  int clip_top;
+  int clip_right;
+  int clip_bottom;
+
+  // Input: current width/height of destination surface.
+  int width;
+  int height;
+
+  // Input: is the render target an FBO.
+  bool is_layer;
+
+  // Input: current transform matrix, in OpenGL format.
+  float transform[16];
+
+  // Output: dirty region to redraw.
+  float dirty_left;
+  float dirty_top;
+  float dirty_right;
+  float dirty_bottom;
+};
+
+// Function to invoke a direct GL draw into the client's pre-configured
+// GL context. Obtained via AwContents.getGLDrawFunction() (static).
+// |view_context| is an opaque pointer that was returned by the corresponding
+// call to AwContents.onPrepareGlDraw().
+// |draw_info| carries the in and out parameters for this draw.
+// |spare| ignored; pass NULL.
+typedef void (*AwGLDrawFunction)(void* view_context,
+                                 const GLDrawInfo* draw_info,
+                                 void* spare);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // ANDROID_WEBVIEW_PUBLIC_BROWSER_GL_DRAW_H_