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 "ui/gl/gl_image_shared_memory.h" 6 7 #include "base/logging.h" 8 #include "base/process/process_handle.h" 9 10 namespace gfx { 11 12 GLImageSharedMemory::GLImageSharedMemory(const gfx::Size& size, 13 unsigned internalformat) 14 : GLImageMemory(size, internalformat) { 15 } 16 17 GLImageSharedMemory::~GLImageSharedMemory() { 18 DCHECK(!shared_memory_); 19 } 20 21 bool GLImageSharedMemory::Initialize(const gfx::GpuMemoryBufferHandle& handle) { 22 if (!HasValidFormat()) 23 return false; 24 25 if (!base::SharedMemory::IsHandleValid(handle.handle)) 26 return false; 27 28 base::SharedMemory shared_memory(handle.handle, true); 29 30 // Duplicate the handle. 31 base::SharedMemoryHandle duped_shared_memory_handle; 32 if (!shared_memory.ShareToProcess(base::GetCurrentProcessHandle(), 33 &duped_shared_memory_handle)) { 34 DVLOG(0) << "Failed to duplicate shared memory handle."; 35 return false; 36 } 37 38 scoped_ptr<base::SharedMemory> duped_shared_memory( 39 new base::SharedMemory(duped_shared_memory_handle, true)); 40 41 if (!duped_shared_memory->Map(Bytes())) { 42 DVLOG(0) << "Failed to map shared memory."; 43 return false; 44 } 45 46 DCHECK(!shared_memory_); 47 shared_memory_ = duped_shared_memory.Pass(); 48 GLImageMemory::Initialize( 49 static_cast<unsigned char*>(shared_memory_->memory())); 50 return true; 51 } 52 53 void GLImageSharedMemory::Destroy(bool have_context) { 54 GLImageMemory::Destroy(have_context); 55 shared_memory_.reset(); 56 } 57 58 } // namespace gfx 59
