content/common/gpu/gpu_memory_buffer_factory_surface_texture.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/common/gpu/gpu_memory_buffer_factory_surface_texture.h"
   6
   7 #include "content/common/android/surface_texture_manager.h"
   8 #include "ui/gl/android/surface_texture.h"
   9 #include "ui/gl/gl_image_surface_texture.h"
  10
  11 namespace content {
  12
  13 GpuMemoryBufferFactorySurfaceTexture::GpuMemoryBufferFactorySurfaceTexture() {
  14 }
  15
  16 GpuMemoryBufferFactorySurfaceTexture::~GpuMemoryBufferFactorySurfaceTexture() {
  17 }
  18
  19 gfx::GpuMemoryBufferHandle
  20 GpuMemoryBufferFactorySurfaceTexture::CreateGpuMemoryBuffer(
  21     gfx::GpuMemoryBufferId id,
  22     const gfx::Size& size,
  23     unsigned internalformat,
  24     int client_id) {
  25   // Note: this needs to be 0 as the surface texture implemenation will take
  26   // ownership of the texture and call glDeleteTextures when the GPU service
  27   // attaches the surface texture to a real texture id. glDeleteTextures
  28   // silently ignores 0.
  29   const int kDummyTextureId = 0;
  30   scoped_refptr<gfx::SurfaceTexture> surface_texture =
  31       gfx::SurfaceTexture::Create(kDummyTextureId);
  32   if (!surface_texture.get())
  33     return gfx::GpuMemoryBufferHandle();
  34
  35   SurfaceTextureManager::GetInstance()->RegisterSurfaceTexture(
  36       id, client_id, surface_texture.get());
  37
  38   SurfaceTextureMapKey key(id, client_id);
  39   DCHECK(surface_textures_.find(key) == surface_textures_.end());
  40   surface_textures_[key] = surface_texture;
  41
  42   gfx::GpuMemoryBufferHandle handle;
  43   handle.type = gfx::SURFACE_TEXTURE_BUFFER;
  44   handle.id = id;
  45   return handle;
  46 }
  47
  48 void GpuMemoryBufferFactorySurfaceTexture::DestroyGpuMemoryBuffer(
  49     gfx::GpuMemoryBufferId id,
  50     int client_id) {
  51   SurfaceTextureMapKey key(id, client_id);
  52   SurfaceTextureMap::iterator it = surface_textures_.find(key);
  53   if (it != surface_textures_.end())
  54     surface_textures_.erase(it);
  55
  56   SurfaceTextureManager::GetInstance()->UnregisterSurfaceTexture(id, client_id);
  57 }
  58
  59 scoped_refptr<gfx::GLImage>
  60 GpuMemoryBufferFactorySurfaceTexture::CreateImageForGpuMemoryBuffer(
  61     gfx::GpuMemoryBufferId id,
  62     const gfx::Size& size,
  63     unsigned internalformat,
  64     int client_id) {
  65   SurfaceTextureMapKey key(id, client_id);
  66   SurfaceTextureMap::iterator it = surface_textures_.find(key);
  67   if (it == surface_textures_.end())
  68     return scoped_refptr<gfx::GLImage>();
  69
  70   scoped_refptr<gfx::GLImageSurfaceTexture> image(
  71       new gfx::GLImageSurfaceTexture(size));
  72   if (!image->Initialize(it->second.get()))
  73     return scoped_refptr<gfx::GLImage>();
  74
  75   return image;
  76 }
  77
  78 }  // namespace content