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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.
*/
#pragma once
#include "GPUBufferBinding.h"
#include "GPUExternalTexture.h"
#include "GPUIntegralTypes.h"
#include "GPUSampler.h"
#include "GPUTextureView.h"
#include "WebGPUBindGroupEntry.h"
#include <utility>
#include <variant>
namespace WebCore {
using GPUBindingResource = std::variant<RefPtr<GPUSampler>, RefPtr<GPUTextureView>, GPUBufferBinding, RefPtr<GPUExternalTexture>>;
inline WebGPU::BindingResource convertToBacking(const GPUBindingResource& bindingResource)
{
return WTF::switchOn(bindingResource, [](const RefPtr<GPUSampler>& sampler) -> WebGPU::BindingResource {
ASSERT(sampler);
return sampler->backing();
}, [](const RefPtr<GPUTextureView>& textureView) -> WebGPU::BindingResource {
ASSERT(textureView);
return textureView->backing();
}, [](const GPUBufferBinding& bufferBinding) -> WebGPU::BindingResource {
return bufferBinding.convertToBacking();
}, [](const RefPtr<GPUExternalTexture>& externalTexture) -> WebGPU::BindingResource {
ASSERT(externalTexture);
return externalTexture->backing();
});
}
struct GPUBindGroupEntry {
WebGPU::BindGroupEntry convertToBacking() const
{
return {
binding,
WebCore::convertToBacking(resource),
};
}
static bool equal(const GPUSampler& entry, const GPUBindingResource& otherEntry)
{
return WTF::switchOn(otherEntry, [&](const RefPtr<GPUSampler>& sampler) -> bool {
return sampler.get() == &entry;
}, [&](const RefPtr<GPUTextureView>&) -> bool {
return false;
}, [&](const GPUBufferBinding&) -> bool {
return false;
}, [&](const RefPtr<GPUExternalTexture>&) -> bool {
return false;
});
}
static bool equal(const GPUTextureView& entry, const GPUBindingResource& otherEntry)
{
return WTF::switchOn(otherEntry, [&](const RefPtr<GPUSampler>&) -> bool {
return false;
}, [&](const RefPtr<GPUTextureView>& textureView) -> bool {
return textureView.get() == &entry;
}, [&](const GPUBufferBinding&) -> bool {
return false;
}, [&](const RefPtr<GPUExternalTexture>&) -> bool {
return false;
});
}
static bool equalSizes(const std::optional<GPUSize64>& a, const std::optional<GPUSize64>& b)
{
return (!a && !b) || (a && b && *a == *b);
}
static bool equal(const GPUBufferBinding& entry, const GPUBindingResource& otherEntry)
{
return WTF::switchOn(otherEntry, [&](const RefPtr<GPUSampler>&) -> bool {
return false;
}, [&](const RefPtr<GPUTextureView>&) -> bool {
return false;
}, [&](const GPUBufferBinding& bufferBinding) -> bool {
return bufferBinding.buffer.get() == entry.buffer.get() && bufferBinding.offset == entry.offset && equalSizes(bufferBinding.size, entry.size);
}, [&](const RefPtr<GPUExternalTexture>&) -> bool {
return false;
});
}
static bool equal(const GPUExternalTexture& entry, const GPUBindingResource& otherEntry)
{
return WTF::switchOn(otherEntry, [&](const RefPtr<GPUSampler>&) -> bool {
return false;
}, [&](const RefPtr<GPUTextureView>&) -> bool {
return false;
}, [&](const GPUBufferBinding&) -> bool {
return false;
}, [&](const RefPtr<GPUExternalTexture>& externalTexture) -> bool {
return externalTexture.get() == &entry;
});
}
static bool equal(const GPUBindGroupEntry& entry, const GPUBindGroupEntry& otherEntry)
{
if (entry.binding != otherEntry.binding)
return false;
return WTF::switchOn(entry.resource, [&](const RefPtr<GPUSampler>& sampler) -> bool {
return sampler.get() && equal(*sampler, otherEntry.resource);
}, [&](const RefPtr<GPUTextureView>& textureView) -> bool {
return textureView.get() && equal(*textureView, otherEntry.resource);
}, [&](const GPUBufferBinding& bufferBinding) -> bool {
return equal(bufferBinding, otherEntry.resource);
}, [&](const RefPtr<GPUExternalTexture>& externalTexture) -> bool {
return externalTexture.get() && equal(*externalTexture, otherEntry.resource);
});
}
const RefPtr<GPUExternalTexture>* externalTexture() const
{
return std::get_if<RefPtr<GPUExternalTexture>>(&resource);
}
GPUIndex32 binding { 0 };
GPUBindingResource resource;
};
}
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