gpu: support RG_88 GpuMemoryBuffer

components/exo/buffer.cc

 // Copyright 2015 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.
 
 #include "components/exo/buffer.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 #include <stdint.h>
@@ skipping 27 matching lines @@
 const int kWaitForReleaseDelayMs = 500;
 
 GLenum GLInternalFormat(gfx::BufferFormat format) {
   const GLenum kGLInternalFormats[] = {
       GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD,  // ATC
       GL_COMPRESSED_RGB_S3TC_DXT1_EXT,     // ATCIA
       GL_COMPRESSED_RGB_S3TC_DXT1_EXT,     // DXT1
       GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,    // DXT5
       GL_ETC1_RGB8_OES,                    // ETC1
       GL_R8_EXT,                           // R_8
+      GL_RG8_EXT,                          // RG_88
       GL_RGB,                              // BGR_565
       GL_RGBA,                             // RGBA_4444
       GL_RGB,                              // RGBX_8888
       GL_RGBA,                             // RGBA_8888
       GL_RGB,                              // BGRX_8888
       GL_BGRA_EXT,                         // BGRA_8888
       GL_RGB_YCRCB_420_CHROMIUM,           // YVU_420
       GL_RGB_YCBCR_420V_CHROMIUM,          // YUV_420_BIPLANAR
       GL_RGB_YCBCR_422_CHROMIUM,           // UYVY_422
   };
@@ skipping 482 matching lines @@
 }
 
 void Buffer::ReleaseContentsTexture(std::unique_ptr<Texture> texture) {
   TRACE_EVENT0("exo", "Buffer::ReleaseContentsTexture");
 
   contents_texture_ = std::move(texture);
   Release();
 }
 
 }  // namespace exo