src/android_webview/browser/gpu_memory_buffer_factory_impl.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 "android_webview/browser/gpu_memory_buffer_factory_impl.h"
   6
   7 #include "android_webview/public/browser/draw_gl.h"
   8 #include "base/logging.h"
   9 #include "gpu/command_buffer/service/in_process_command_buffer.h"
  10 #include "ui/gfx/gpu_memory_buffer.h"
  11 #include "ui/gfx/size.h"
  12 #include "ui/gl/gl_bindings.h"
  13 #include "ui/gl/gl_image_android_native_buffer.h"
  14
  15 namespace android_webview {
  16
  17 namespace {
  18
  19 // Provides hardware rendering functions from the Android glue layer.
  20 AwDrawGLFunctionTable* g_gl_draw_functions = NULL;
  21
  22 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  23  public:
  24   GpuMemoryBufferImpl(long buffer_id, const gfx::Size& size)
  25       : buffer_id_(buffer_id), size_(size), mapped_(false) {
  26     DCHECK(buffer_id_);
  27   }
  28
  29   virtual ~GpuMemoryBufferImpl() {
  30     g_gl_draw_functions->release_graphic_buffer(buffer_id_);
  31   }
  32
  33   // Overridden from gfx::GpuMemoryBuffer:
  34   virtual void* Map() OVERRIDE {
  35     void* vaddr = NULL;
  36     int err = g_gl_draw_functions->map(buffer_id_, MAP_READ_WRITE, &vaddr);
  37     DCHECK(!err);
  38     mapped_ = true;
  39     return vaddr;
  40   }
  41   virtual void Unmap() OVERRIDE {
  42     int err = g_gl_draw_functions->unmap(buffer_id_);
  43     DCHECK(!err);
  44     mapped_ = false;
  45   }
  46   virtual bool IsMapped() const OVERRIDE { return mapped_; }
  47   virtual uint32 GetStride() const OVERRIDE {
  48     return g_gl_draw_functions->get_stride(buffer_id_);
  49   }
  50   virtual gfx::GpuMemoryBufferHandle GetHandle() const OVERRIDE {
  51     gfx::GpuMemoryBufferHandle handle;
  52     handle.type = gfx::ANDROID_NATIVE_BUFFER;
  53     handle.buffer_id = buffer_id_;
  54     return handle;
  55   }
  56
  57  private:
  58   long buffer_id_;
  59   gfx::Size size_;
  60   bool mapped_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImpl);
  63 };
  64
  65 }  // namespace
  66
  67 GpuMemoryBufferFactoryImpl::GpuMemoryBufferFactoryImpl() {
  68 }
  69
  70 GpuMemoryBufferFactoryImpl::~GpuMemoryBufferFactoryImpl() {
  71 }
  72
  73 scoped_ptr<gfx::GpuMemoryBuffer>
  74 GpuMemoryBufferFactoryImpl::AllocateGpuMemoryBuffer(size_t width,
  75                                                     size_t height,
  76                                                     unsigned internalformat,
  77                                                     unsigned usage) {
  78   // For Android WebView we assume the |internalformat| will always be
  79   // GL_RGBA8_OES.
  80   CHECK_EQ(static_cast<GLenum>(GL_RGBA8_OES), internalformat);
  81   CHECK(g_gl_draw_functions);
  82   long buffer_id = g_gl_draw_functions->create_graphic_buffer(width, height);
  83   if (!buffer_id)
  84     return scoped_ptr<gfx::GpuMemoryBuffer>();
  85
  86   return make_scoped_ptr(
  87              new GpuMemoryBufferImpl(buffer_id, gfx::Size(width, height)))
  88       .PassAs<gfx::GpuMemoryBuffer>();
  89 }
  90
  91 scoped_refptr<gfx::GLImage>
  92 GpuMemoryBufferFactoryImpl::CreateImageForGpuMemoryBuffer(
  93     const gfx::GpuMemoryBufferHandle& handle,
  94     const gfx::Size& size,
  95     unsigned internalformat) {
  96   DCHECK_EQ(gfx::ANDROID_NATIVE_BUFFER, handle.type);
  97
  98   EGLClientBuffer native_buffer =
  99       g_gl_draw_functions->get_native_buffer(handle.buffer_id);
 100   DCHECK(native_buffer);
 101
 102   scoped_refptr<gfx::GLImageAndroidNativeBuffer> image(
 103       new gfx::GLImageAndroidNativeBuffer(size));
 104   if (!image->Initialize(native_buffer))
 105     return scoped_refptr<gfx::GLImage>();
 106
 107   return image;
 108 }
 109
 110 // static
 111 void GpuMemoryBufferFactoryImpl::SetAwDrawGLFunctionTable(
 112     AwDrawGLFunctionTable* table) {
 113   g_gl_draw_functions = table;
 114 }
 115
 116 bool GpuMemoryBufferFactoryImpl::Initialize() {
 117   if (!g_gl_draw_functions)
 118     return false;
 119
 120   gpu::InProcessCommandBuffer::SetGpuMemoryBufferFactory(this);
 121   return true;
 122 }
 123
 124 }  // namespace android_webview