gpu/command_buffer/service/image_factory.h

   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 #ifndef GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_
   6 #define GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "gpu/gpu_export.h"
  10 #include "ui/gfx/geometry/size.h"
  11 #include "ui/gfx/gpu_memory_buffer.h"
  12
  13 namespace gfx {
  14 class GLImage;
  15 }
  16
  17 namespace gpu {
  18 struct Capabilities;
  19
  20 class GPU_EXPORT ImageFactory {
  21  public:
  22   ImageFactory();
  23
  24   // Returns a valid GpuMemoryBuffer format given a valid internalformat as
  25   // defined by CHROMIUM_gpu_memory_buffer_image.
  26   static gfx::GpuMemoryBuffer::Format ImageFormatToGpuMemoryBufferFormat(
  27       unsigned internalformat);
  28
  29   // Returns a valid GpuMemoryBuffer usage given a valid usage as defined by
  30   // CHROMIUM_gpu_memory_buffer_image.
  31   static gfx::GpuMemoryBuffer::Usage ImageUsageToGpuMemoryBufferUsage(
  32       unsigned usage);
  33
  34   // Returns true if |internalformat| is compatible with |format|.
  35   static bool IsImageFormatCompatibleWithGpuMemoryBufferFormat(
  36       unsigned internalformat,
  37       gfx::GpuMemoryBuffer::Format format);
  38
  39   // Returns true if |format| is supported by |capabilities|.
  40   static bool IsGpuMemoryBufferFormatSupported(
  41       gfx::GpuMemoryBuffer::Format format,
  42       const Capabilities& capabilities);
  43
  44   // Returns true if |size| is valid for |format|.
  45   static bool IsImageSizeValidForGpuMemoryBufferFormat(
  46       const gfx::Size& size,
  47       gfx::GpuMemoryBuffer::Format format);
  48
  49   // Creates a GLImage instance for GPU memory buffer identified by |handle|.
  50   // |client_id| should be set to the client requesting the creation of instance
  51   // and can be used by factory implementation to verify access rights.
  52   virtual scoped_refptr<gfx::GLImage> CreateImageForGpuMemoryBuffer(
  53       const gfx::GpuMemoryBufferHandle& handle,
  54       const gfx::Size& size,
  55       gfx::GpuMemoryBuffer::Format format,
  56       unsigned internalformat,
  57       int client_id) = 0;
  58
  59  protected:
  60   virtual ~ImageFactory();
  61 };
  62
  63 }  // namespace gpu
  64
  65 #endif  // GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_