| /* |
| * Copyright (C) 2010 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ShareableBitmap.h" |
| |
| #include "SharedMemory.h" |
| #include "WebCoreArgumentCoders.h" |
| #include <WebCore/GraphicsContext.h> |
| |
| namespace WebKit { |
| using namespace WebCore; |
| |
| ShareableBitmap::Handle::Handle() |
| { |
| } |
| |
| void ShareableBitmap::Handle::encode(IPC::Encoder& encoder) const |
| { |
| encoder << m_handle; |
| encoder << m_size; |
| encoder << m_configuration; |
| } |
| |
| bool ShareableBitmap::Handle::decode(IPC::Decoder& decoder, Handle& handle) |
| { |
| if (!decoder.decode(handle.m_handle)) |
| return false; |
| if (!decoder.decode(handle.m_size)) |
| return false; |
| if (!decoder.decode(handle.m_configuration)) |
| return false; |
| return true; |
| } |
| |
| void ShareableBitmap::Handle::clear() |
| { |
| m_handle.clear(); |
| m_size = IntSize(); |
| m_configuration = { }; |
| } |
| |
| void ShareableBitmap::Configuration::encode(IPC::Encoder& encoder) const |
| { |
| encoder << isOpaque; |
| #if PLATFORM(COCOA) |
| encoder << colorSpace; |
| #endif |
| #if USE(DIRECT2D) |
| SharedMemory::Handle::encodeHandle(encoder, sharedResourceHandle); |
| |
| // Hand off ownership of our HANDLE to the receiving process. It will close it for us. |
| // FIXME: If the receiving process crashes before it receives the memory, the memory will be |
| // leaked. See <http://webkit.org/b/47502>. |
| sharedResourceHandle = nullptr; |
| #endif |
| } |
| |
| bool ShareableBitmap::Configuration::decode(IPC::Decoder& decoder, Configuration& configuration) |
| { |
| if (!decoder.decode(configuration.isOpaque)) |
| return false; |
| #if PLATFORM(COCOA) |
| if (!decoder.decode(configuration.colorSpace)) |
| return false; |
| #endif |
| #if USE(DIRECT2D) |
| auto processSpecificHandle = SharedMemory::Handle::decodeHandle(decoder); |
| if (!processSpecificHandle) |
| return false; |
| |
| configuration.sharedResourceHandle = processSpecificHandle.value(); |
| #endif |
| return true; |
| } |
| |
| RefPtr<ShareableBitmap> ShareableBitmap::create(const IntSize& size, Configuration configuration) |
| { |
| auto numBytes = numBytesForSize(size, configuration); |
| if (numBytes.hasOverflowed()) |
| return nullptr; |
| |
| void* data = 0; |
| if (!tryFastMalloc(numBytes.unsafeGet()).getValue(data)) |
| return nullptr; |
| |
| return adoptRef(new ShareableBitmap(size, configuration, data)); |
| } |
| |
| RefPtr<ShareableBitmap> ShareableBitmap::createShareable(const IntSize& size, Configuration configuration) |
| { |
| auto numBytes = numBytesForSize(size, configuration); |
| if (numBytes.hasOverflowed()) |
| return nullptr; |
| |
| RefPtr<SharedMemory> sharedMemory = SharedMemory::allocate(numBytes.unsafeGet()); |
| if (!sharedMemory) |
| return nullptr; |
| |
| return adoptRef(new ShareableBitmap(size, configuration, sharedMemory)); |
| } |
| |
| RefPtr<ShareableBitmap> ShareableBitmap::create(const IntSize& size, Configuration configuration, RefPtr<SharedMemory> sharedMemory) |
| { |
| ASSERT(sharedMemory); |
| |
| auto numBytes = numBytesForSize(size, configuration); |
| if (numBytes.hasOverflowed()) |
| return nullptr; |
| if (sharedMemory->size() < numBytes.unsafeGet()) { |
| ASSERT_NOT_REACHED(); |
| return nullptr; |
| } |
| |
| return adoptRef(new ShareableBitmap(size, configuration, sharedMemory)); |
| } |
| |
| RefPtr<ShareableBitmap> ShareableBitmap::create(const Handle& handle, SharedMemory::Protection protection) |
| { |
| // Create the shared memory. |
| auto sharedMemory = SharedMemory::map(handle.m_handle, protection); |
| if (!sharedMemory) |
| return nullptr; |
| |
| return create(handle.m_size, handle.m_configuration, WTFMove(sharedMemory)); |
| } |
| |
| bool ShareableBitmap::createHandle(Handle& handle, SharedMemory::Protection protection) const |
| { |
| ASSERT(isBackedBySharedMemory()); |
| |
| if (!m_sharedMemory->createHandle(handle.m_handle, protection)) |
| return false; |
| handle.m_size = m_size; |
| handle.m_configuration = m_configuration; |
| return true; |
| } |
| |
| ShareableBitmap::ShareableBitmap(const IntSize& size, Configuration configuration, void* data) |
| : m_size(size) |
| , m_configuration(configuration) |
| , m_data(data) |
| { |
| ASSERT(RunLoop::isMain()); |
| } |
| |
| ShareableBitmap::ShareableBitmap(const IntSize& size, Configuration configuration, RefPtr<SharedMemory> sharedMemory) |
| : m_size(size) |
| , m_configuration(configuration) |
| , m_sharedMemory(sharedMemory) |
| , m_data(nullptr) |
| { |
| ASSERT(RunLoop::isMain()); |
| |
| #if USE(DIRECT2D) |
| createSharedResource(); |
| #endif |
| } |
| |
| ShareableBitmap::~ShareableBitmap() |
| { |
| ASSERT(RunLoop::isMain()); |
| |
| if (!isBackedBySharedMemory()) |
| fastFree(m_data); |
| #if USE(DIRECT2D) |
| disposeSharedResource(); |
| #endif |
| } |
| |
| void* ShareableBitmap::data() const |
| { |
| if (isBackedBySharedMemory()) |
| return m_sharedMemory->data(); |
| |
| ASSERT(m_data); |
| return m_data; |
| } |
| |
| Checked<unsigned, RecordOverflow> ShareableBitmap::numBytesForSize(WebCore::IntSize size, const ShareableBitmap::Configuration& configuration) |
| { |
| #if USE(DIRECT2D) |
| // We pass references to GPU textures, so no need to allocate frame buffers here. Just send a small bit of data. |
| return sizeof(void*); |
| #else |
| return calculateBytesPerRow(size, configuration) * size.height(); |
| #endif |
| } |
| |
| } // namespace WebKit |