Add support for compressed GPU memory buffers.

ui/gl/gl_image_linux_dma_buffer.cc

 // Copyright 2014 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 "ui/gl/gl_image_linux_dma_buffer.h"
 
 #include <unistd.h>
 
 #define FOURCC(a, b, c, d)                                    \
   ((static_cast<uint32>(a)) | (static_cast<uint32>(b) << 8) | \
    (static_cast<uint32>(c) << 16) | (static_cast<uint32>(d) << 24))
 
 #define DRM_FORMAT_ARGB8888 FOURCC('A', 'R', '2', '4')
 #define DRM_FORMAT_XRGB8888 FOURCC('X', 'R', '2', '4')
 
 namespace gfx {
 namespace {
 
 bool ValidFormat(unsigned internalformat, gfx::GpuMemoryBuffer::Format format) {
   switch (internalformat) {
+    case GL_ATC_RGB_AMD:
+      return format == gfx::GpuMemoryBuffer::ATC;
+    case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
+      return format == gfx::GpuMemoryBuffer::ATCIA;
+    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+      return format == gfx::GpuMemoryBuffer::DXT1;
+    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+      return format == gfx::GpuMemoryBuffer::DXT5;
+    case GL_ETC1_RGB8_OES:
+      return format == gfx::GpuMemoryBuffer::ETC1;
     case GL_RGB:
       switch (format) {
         case gfx::GpuMemoryBuffer::RGBX_8888:
           return true;
+        case gfx::GpuMemoryBuffer::ATC:
+        case gfx::GpuMemoryBuffer::ATCIA:
+        case gfx::GpuMemoryBuffer::DXT1:
+        case gfx::GpuMemoryBuffer::DXT5:
+        case gfx::GpuMemoryBuffer::ETC1:
         case gfx::GpuMemoryBuffer::RGBA_8888:
         case gfx::GpuMemoryBuffer::BGRA_8888:
           return false;
       }
       NOTREACHED();
       return false;
     case GL_RGBA:
       switch (format) {
         case gfx::GpuMemoryBuffer::BGRA_8888:
           return true;
+        case gfx::GpuMemoryBuffer::ATC:
+        case gfx::GpuMemoryBuffer::ATCIA:
+        case gfx::GpuMemoryBuffer::DXT1:
+        case gfx::GpuMemoryBuffer::DXT5:
+        case gfx::GpuMemoryBuffer::ETC1:
         case gfx::GpuMemoryBuffer::RGBX_8888:
         case gfx::GpuMemoryBuffer::RGBA_8888:
           return false;
       }
       NOTREACHED();
       return false;
     default:
       return false;
   }
 }
 
 EGLint FourCC(gfx::GpuMemoryBuffer::Format format) {
   switch (format) {
     case gfx::GpuMemoryBuffer::BGRA_8888:
       return DRM_FORMAT_ARGB8888;
     case gfx::GpuMemoryBuffer::RGBX_8888:
       return DRM_FORMAT_XRGB8888;
+    case gfx::GpuMemoryBuffer::ATC:
+    case gfx::GpuMemoryBuffer::ATCIA:
+    case gfx::GpuMemoryBuffer::DXT1:
+    case gfx::GpuMemoryBuffer::DXT5:
+    case gfx::GpuMemoryBuffer::ETC1:
     case gfx::GpuMemoryBuffer::RGBA_8888:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 bool IsHandleValid(const base::FileDescriptor& handle) {
@@ skipping 36 matching lines @@
                     EGL_DMA_BUF_PLANE0_OFFSET_EXT,
                     0,
                     EGL_DMA_BUF_PLANE0_PITCH_EXT,
                     pitch,
                     EGL_NONE};
   return GLImageEGL::Initialize(
       EGL_LINUX_DMA_BUF_EXT, static_cast<EGLClientBuffer>(NULL), attrs);
 }
 
 }  // namespace gfx