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/*
* Copyright (C) 2021-2023 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 "WebGPUBufferImpl.h"
#if HAVE(WEBGPU_IMPLEMENTATION)
#include "WebGPUConvertToBackingContext.h"
#include <WebGPU/WebGPUExt.h>
#include <wtf/BlockPtr.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore::WebGPU {
WTF_MAKE_TZONE_ALLOCATED_IMPL(BufferImpl);
BufferImpl::BufferImpl(WebGPUPtr<WGPUBuffer>&& buffer, ConvertToBackingContext& convertToBackingContext)
: m_backing(WTFMove(buffer))
, m_convertToBackingContext(convertToBackingContext)
{
}
BufferImpl::~BufferImpl() = default;
static Size64 getMappedSize(WGPUBuffer buffer, std::optional<Size64> size, Size64 offset)
{
if (size.has_value())
return size.value();
auto bufferSize = wgpuBufferGetInitialSize(buffer);
return bufferSize > offset ? (bufferSize - offset) : 0;
}
static void mapAsyncCallback(WGPUBufferMapAsyncStatus status, void* userdata)
{
auto block = reinterpret_cast<void(^)(WGPUBufferMapAsyncStatus)>(userdata);
block(status);
Block_release(block); // Block_release is matched with Block_copy below in BufferImpl::mapAsync().
}
void BufferImpl::mapAsync(MapModeFlags mapModeFlags, Size64 offset, std::optional<Size64> size, CompletionHandler<void(bool)>&& callback)
{
auto backingMapModeFlags = m_convertToBackingContext->convertMapModeFlagsToBacking(mapModeFlags);
auto usedSize = getMappedSize(m_backing.get(), size, offset);
// FIXME: Check the casts.
auto blockPtr = makeBlockPtr([callback = WTFMove(callback)](WGPUBufferMapAsyncStatus status) mutable {
callback(status == WGPUBufferMapAsyncStatus_Success);
});
wgpuBufferMapAsync(m_backing.get(), backingMapModeFlags, static_cast<size_t>(offset), static_cast<size_t>(usedSize), &mapAsyncCallback, Block_copy(blockPtr.get())); // Block_copy is matched with Block_release above in mapAsyncCallback().
}
void BufferImpl::getMappedRange(Size64 offset, std::optional<Size64> size, NOESCAPE Function<void(std::span<uint8_t>)>&& callback)
{
auto usedSize = getMappedSize(m_backing.get(), size, offset);
auto pointer = wgpuBufferGetMappedRange(m_backing.get(), static_cast<size_t>(offset), static_cast<size_t>(usedSize)).data();
auto bufferSize = wgpuBufferGetInitialSize(m_backing.get());
size_t actualSize = pointer ? static_cast<size_t>(bufferSize) : 0;
size_t actualOffset = pointer ? static_cast<size_t>(offset) : 0;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
callback(unsafeMakeSpan(static_cast<uint8_t*>(pointer) - actualOffset, actualSize));
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
}
std::span<uint8_t> BufferImpl::getBufferContents()
{
if (!m_backing.get())
return { };
return wgpuBufferGetBufferContents(m_backing.get());
}
#if ENABLE(WEBGPU_SWIFT)
void BufferImpl::copyFrom(std::span<const uint8_t> data, size_t offset)
{
RELEASE_ASSERT(backing());
return wgpuBufferCopy(backing(), data, offset);
}
#else
void BufferImpl::copyFrom(std::span<const uint8_t>, size_t)
{
RELEASE_ASSERT_NOT_REACHED();
}
#endif
void BufferImpl::unmap()
{
wgpuBufferUnmap(m_backing.get());
}
void BufferImpl::destroy()
{
wgpuBufferDestroy(m_backing.get());
}
void BufferImpl::setLabelInternal(const String& label)
{
wgpuBufferSetLabel(m_backing.get(), label.utf8().data());
}
} // namespace WebCore::WebGPU
#endif // HAVE(WEBGPU_IMPLEMENTATION)
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