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      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.h"
      6 
      7 #include "base/logging.h"
      8 #include "content/common/gpu/gpu_memory_buffer_factory_io_surface.h"
      9 #include "ui/gl/gl_image.h"
     10 #include "ui/gl/gl_image_shared_memory.h"
     11 
     12 namespace content {
     13 namespace {
     14 
     15 class GpuMemoryBufferFactoryImpl : public GpuMemoryBufferFactory {
     16  public:
     17   // Overridden from GpuMemoryBufferFactory:
     18   virtual gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
     19       const gfx::GpuMemoryBufferHandle& handle,
     20       const gfx::Size& size,
     21       unsigned internalformat,
     22       unsigned usage) OVERRIDE {
     23     switch (handle.type) {
     24       case gfx::IO_SURFACE_BUFFER:
     25         return io_surface_factory_.CreateGpuMemoryBuffer(
     26             handle.global_id, size, internalformat);
     27       default:
     28         NOTREACHED();
     29         return gfx::GpuMemoryBufferHandle();
     30     }
     31   }
     32   virtual void DestroyGpuMemoryBuffer(
     33       const gfx::GpuMemoryBufferHandle& handle) OVERRIDE {
     34     switch (handle.type) {
     35       case gfx::IO_SURFACE_BUFFER:
     36         io_surface_factory_.DestroyGpuMemoryBuffer(handle.global_id);
     37         break;
     38       default:
     39         NOTREACHED();
     40         break;
     41     }
     42   }
     43   virtual scoped_refptr<gfx::GLImage> CreateImageForGpuMemoryBuffer(
     44       const gfx::GpuMemoryBufferHandle& handle,
     45       const gfx::Size& size,
     46       unsigned internalformat,
     47       int client_id) OVERRIDE {
     48     switch (handle.type) {
     49       case gfx::SHARED_MEMORY_BUFFER: {
     50         scoped_refptr<gfx::GLImageSharedMemory> image(
     51             new gfx::GLImageSharedMemory(size, internalformat));
     52         if (!image->Initialize(handle))
     53           return NULL;
     54 
     55         return image;
     56       }
     57       case gfx::IO_SURFACE_BUFFER: {
     58         // Verify that client is the owner of the buffer we're about to use.
     59         if (handle.global_id.secondary_id != client_id)
     60           return scoped_refptr<gfx::GLImage>();
     61 
     62         return io_surface_factory_.CreateImageForGpuMemoryBuffer(
     63             handle.global_id, size, internalformat);
     64       }
     65       default:
     66         NOTREACHED();
     67         return scoped_refptr<gfx::GLImage>();
     68     }
     69   }
     70 
     71  private:
     72   GpuMemoryBufferFactoryIOSurface io_surface_factory_;
     73 };
     74 
     75 }  // namespace
     76 
     77 // static
     78 scoped_ptr<GpuMemoryBufferFactory> GpuMemoryBufferFactory::Create() {
     79   return make_scoped_ptr<GpuMemoryBufferFactory>(
     80       new GpuMemoryBufferFactoryImpl);
     81 }
     82 
     83 }  // namespace content
     84