Attach YUV420 to RGB converter to GLContext

ui/gl/yuv_to_rgb_converter.h

+// Copyright 2016 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 UI_GL_YUV420_RGB_CONVERTER_H_
+#define UI_GL_YUV420_RGB_CONVERTER_H_
+
+#include "ui/gfx/geometry/size.h"
+
+namespace gl {
+
+class YUVToRGBConverter {
+ public:
+  YUVToRGBConverter();
+  ~YUVToRGBConverter();
+  void CopyYUV420ToRGB(unsigned target,

[Daniele Castagna, 2016/04/17 07:56:03]

nit: the style guide suggests to have input paramenters followed by output
parameters. While |rgb_texture| is not really an output parameter, semantically
it is, maybe it should be the last parameter? I don't have any problem if you
want to leave it as it is.

[ccameron, 2016/04/18 18:17:39]

Good point --done.

+                       unsigned rgb_texture,
+                       unsigned y_texture,
+                       unsigned uv_texture,
+                       const gfx::Size& size);
+
+ private:
+  unsigned framebuffer_ = 0;
+  unsigned vertex_shader_ = 0;
+  unsigned fragment_shader_ = 0;
+  unsigned program_ = 0;
+  int size_location_ = -1;
+  unsigned vertex_buffer_ = 0;
+};
+
+}  // namespace gl
+
+#endif  // UI_GL_YUV420_RGB_CONVERTER_H_