src/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.cc

   1 // Copyright 2013 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/client/gpu_memory_buffer_impl_io_surface.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/gl/gl_bindings.h"
   9 #include "ui/gl/io_surface_support_mac.h"
  10
  11 namespace content {
  12
  13 GpuMemoryBufferImplIOSurface::GpuMemoryBufferImplIOSurface(
  14     gfx::Size size, unsigned internalformat)
  15     : GpuMemoryBufferImpl(size, internalformat),
  16       io_surface_support_(IOSurfaceSupport::Initialize()) {
  17   CHECK(io_surface_support_);
  18 }
  19
  20 GpuMemoryBufferImplIOSurface::~GpuMemoryBufferImplIOSurface() {
  21 }
  22
  23 // static
  24 bool GpuMemoryBufferImplIOSurface::IsFormatSupported(unsigned internalformat) {
  25   switch (internalformat) {
  26     case GL_BGRA8_EXT:
  27       return true;
  28     default:
  29       return false;
  30   }
  31 }
  32
  33 // static
  34 uint32 GpuMemoryBufferImplIOSurface::PixelFormat(unsigned internalformat) {
  35   switch (internalformat) {
  36     case GL_BGRA8_EXT:
  37       return 'BGRA';
  38     default:
  39       NOTREACHED();
  40       return 0;
  41   }
  42 }
  43
  44 bool GpuMemoryBufferImplIOSurface::Initialize(
  45     gfx::GpuMemoryBufferHandle handle) {
  46   io_surface_.reset(io_surface_support_->IOSurfaceLookup(handle.io_surface_id));
  47   if (!io_surface_) {
  48     VLOG(1) << "IOSurface lookup failed";
  49     return false;
  50   }
  51
  52   return true;
  53 }
  54
  55 void GpuMemoryBufferImplIOSurface::Map(AccessMode mode, void** vaddr) {
  56   DCHECK(!mapped_);
  57   io_surface_support_->IOSurfaceLock(io_surface_, 0, NULL);
  58   *vaddr = io_surface_support_->IOSurfaceGetBaseAddress(io_surface_);
  59   mapped_ = true;
  60 }
  61
  62 void GpuMemoryBufferImplIOSurface::Unmap() {
  63   DCHECK(mapped_);
  64   io_surface_support_->IOSurfaceUnlock(io_surface_, 0, NULL);
  65   mapped_ = false;
  66 }
  67
  68 uint32 GpuMemoryBufferImplIOSurface::GetStride() const {
  69   return io_surface_support_->IOSurfaceGetBytesPerRow(io_surface_);
  70 }
  71
  72 gfx::GpuMemoryBufferHandle GpuMemoryBufferImplIOSurface::GetHandle() const {
  73   gfx::GpuMemoryBufferHandle handle;
  74   handle.type = gfx::IO_SURFACE_BUFFER;
  75   handle.io_surface_id = io_surface_support_->IOSurfaceGetID(io_surface_);
  76   return handle;
  77 }
  78
  79 }  // namespace content