| // Copyright (c) 2012 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 "ui/surface/transport_dib.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #include <memory> |
| |
| #include "base/logging.h" |
| #include "base/memory/shared_memory.h" |
| #include "build/build_config.h" |
| #include "skia/ext/platform_canvas.h" |
| |
| TransportDIB::TransportDIB() |
| : size_(0) { |
| } |
| |
| TransportDIB::TransportDIB(TransportDIB::Handle dib) |
| : shared_memory_(dib, false /* read write */), |
| size_(0) { |
| } |
| |
| TransportDIB::~TransportDIB() { |
| } |
| |
| // static |
| TransportDIB* TransportDIB::Map(Handle handle) { |
| std::unique_ptr<TransportDIB> dib(CreateWithHandle(handle)); |
| if (!dib->Map()) |
| return NULL; |
| return dib.release(); |
| } |
| |
| // static |
| TransportDIB* TransportDIB::CreateWithHandle(Handle handle) { |
| return new TransportDIB(handle); |
| } |
| |
| // static |
| bool TransportDIB::is_valid_handle(Handle dib) { |
| return base::SharedMemory::IsHandleValid(dib); |
| } |
| |
| std::unique_ptr<SkCanvas> TransportDIB::GetPlatformCanvas(int w, |
| int h, |
| bool opaque) { |
| if ((!memory() && !Map()) || !VerifyCanvasSize(w, h)) |
| return NULL; |
| return skia::CreatePlatformCanvasWithPixels( |
| w, h, opaque, reinterpret_cast<uint8_t*>(memory()), |
| skia::RETURN_NULL_ON_FAILURE); |
| } |
| |
| bool TransportDIB::Map() { |
| if (!is_valid_handle(shared_memory_.handle())) |
| return false; |
| #if defined(OS_ANDROID) |
| if (!shared_memory_.Map(0)) |
| return false; |
| size_ = shared_memory_.mapped_size(); |
| #else |
| if (memory()) |
| return true; |
| |
| size_t size = shared_memory_.handle().GetSize(); |
| if (!shared_memory_.Map(size)) |
| return false; |
| |
| size_ = size; |
| #endif |
| return true; |
| } |
| |
| void* TransportDIB::memory() const { |
| return shared_memory_.memory(); |
| } |