| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/common/gpu/client/gpu_memory_buffer_impl.h" |
| |
| #include "ui/gl/gl_bindings.h" |
| |
| namespace content { |
| |
| GpuMemoryBufferImpl::GpuMemoryBufferImpl( |
| scoped_ptr<base::SharedMemory> shared_memory, |
| size_t width, |
| size_t height, |
| unsigned internalformat) |
| : shared_memory_(shared_memory.Pass()), |
| size_(gfx::Size(width, height)), |
| internalformat_(internalformat), |
| mapped_(false) { |
| DCHECK(!shared_memory_->memory()); |
| DCHECK(IsFormatValid(internalformat)); |
| } |
| |
| GpuMemoryBufferImpl::~GpuMemoryBufferImpl() { |
| } |
| |
| void GpuMemoryBufferImpl::Map(AccessMode mode, void** vaddr) { |
| DCHECK(!mapped_); |
| *vaddr = NULL; |
| if (!shared_memory_->Map(size_.GetArea() * BytesPerPixel(internalformat_))) |
| return; |
| *vaddr = shared_memory_->memory(); |
| mapped_ = true; |
| } |
| |
| void GpuMemoryBufferImpl::Unmap() { |
| DCHECK(mapped_); |
| shared_memory_->Unmap(); |
| mapped_ = false; |
| } |
| |
| bool GpuMemoryBufferImpl::IsMapped() const { |
| return mapped_; |
| } |
| |
| uint32 GpuMemoryBufferImpl::GetStride() const { |
| return size_.width() * BytesPerPixel(internalformat_); |
| } |
| |
| gfx::GpuMemoryBufferHandle GpuMemoryBufferImpl::GetHandle() const { |
| gfx::GpuMemoryBufferHandle handle; |
| handle.type = gfx::SHARED_MEMORY_BUFFER; |
| handle.handle = shared_memory_->handle(); |
| return handle; |
| } |
| |
| // static |
| bool GpuMemoryBufferImpl::IsFormatValid(unsigned internalformat) { |
| // GL_RGBA8_OES is the only supported format at the moment. |
| switch (internalformat) { |
| case GL_RGBA8_OES: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| // static |
| size_t GpuMemoryBufferImpl::BytesPerPixel(unsigned internalformat) { |
| // GL_RGBA_OES has 4 bytes per pixel. |
| switch (internalformat) { |
| case GL_RGBA8_OES: |
| return 4; |
| default: |
| NOTREACHED(); |
| return 0; |
| } |
| } |
| |
| } // namespace content |