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// Copyright 2017 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_native/metal/PipelineLayoutMTL.h"
#include "common/BitSetIterator.h"
#include "dawn_native/BindGroupLayout.h"
#include "dawn_native/metal/DeviceMTL.h"
namespace dawn_native { namespace metal {
PipelineLayout::PipelineLayout(Device* device, const PipelineLayoutDescriptor* descriptor)
: PipelineLayoutBase(device, descriptor) {
// Each stage has its own numbering namespace in CompilerMSL.
for (auto stage : IterateStages(kAllStages)) {
uint32_t bufferIndex = 0;
uint32_t samplerIndex = 0;
uint32_t textureIndex = 0;
for (uint32_t group : IterateBitSet(GetBindGroupLayoutsMask())) {
for (BindingIndex bindingIndex{0};
bindingIndex < GetBindGroupLayout(group)->GetBindingCount(); ++bindingIndex) {
const BindingInfo& bindingInfo =
GetBindGroupLayout(group)->GetBindingInfo(bindingIndex);
if (!(bindingInfo.visibility & StageBit(stage))) {
continue;
}
switch (bindingInfo.type) {
case wgpu::BindingType::UniformBuffer:
case wgpu::BindingType::StorageBuffer:
case wgpu::BindingType::ReadonlyStorageBuffer:
mIndexInfo[stage][group][bindingIndex] = bufferIndex;
bufferIndex++;
break;
case wgpu::BindingType::Sampler:
case wgpu::BindingType::ComparisonSampler:
mIndexInfo[stage][group][bindingIndex] = samplerIndex;
samplerIndex++;
break;
case wgpu::BindingType::SampledTexture:
case wgpu::BindingType::ReadonlyStorageTexture:
case wgpu::BindingType::WriteonlyStorageTexture:
mIndexInfo[stage][group][bindingIndex] = textureIndex;
textureIndex++;
break;
case wgpu::BindingType::StorageTexture:
UNREACHABLE();
break;
}
}
}
mBufferBindingCount[stage] = bufferIndex;
}
}
const PipelineLayout::BindingIndexInfo& PipelineLayout::GetBindingIndexInfo(
SingleShaderStage stage) const {
return mIndexInfo[stage];
}
uint32_t PipelineLayout::GetBufferBindingCount(SingleShaderStage stage) {
return mBufferBindingCount[stage];
}
}} // namespace dawn_native::metal