[Remoting] OpenGL Rendering Layer

remoting/client/opengl/draw_tex.frag

+// 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.
+
+precision mediump float;
+
+// Region on the texture to be used (normally the whole texture).
+varying vec2 v_texCoord;
+uniform sampler2D u_texture;
+void main()
+{
+  // There is some issue with the RGBA decoder (see JniFrameConsumer) so we
+  // prefer BGRA. However, OpenGL ES doesn't seem to support GL_BGRA when
+  // uploading the texture, so we solve this by specifying GL_RGBA when
+  // uploading the pixel and swap b and r in the frag shader.
+  gl_FragColor = texture2D(u_texture, v_texCoord).bgra;
+}