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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.
#ifndef DAWNNATIVE_METAL_PIPELINELAYOUTMTL_H_
#define DAWNNATIVE_METAL_PIPELINELAYOUTMTL_H_
#include "common/ityp_stack_vec.h"
#include "dawn_native/BindingInfo.h"
#include "dawn_native/PipelineLayout.h"
#include "dawn_native/PerStage.h"
#import <Metal/Metal.h>
namespace dawn_native { namespace metal {
class Device;
// The number of Metal buffers usable by applications in general
static constexpr size_t kMetalBufferTableSize = 31;
// The Metal buffer slot that Dawn reserves for its own use to pass more data to shaders
static constexpr size_t kBufferLengthBufferSlot = kMetalBufferTableSize - 1;
// The number of Metal buffers Dawn can use in a generic way (i.e. that aren't reserved)
static constexpr size_t kGenericMetalBufferSlots = kMetalBufferTableSize - 1;
static constexpr BindGroupIndex kPullingBufferBindingSet = BindGroupIndex(kMaxBindGroups);
class PipelineLayout final : public PipelineLayoutBase {
public:
static Ref<PipelineLayout> Create(Device* device,
const PipelineLayoutDescriptor* descriptor);
using BindingIndexInfo =
ityp::array<BindGroupIndex,
ityp::stack_vec<BindingIndex, uint32_t, kMaxOptimalBindingsPerGroup>,
kMaxBindGroups>;
const BindingIndexInfo& GetBindingIndexInfo(SingleShaderStage stage) const;
// The number of Metal vertex stage buffers used for the whole pipeline layout.
uint32_t GetBufferBindingCount(SingleShaderStage stage);
private:
PipelineLayout(Device* device, const PipelineLayoutDescriptor* descriptor);
~PipelineLayout() override = default;
PerStage<BindingIndexInfo> mIndexInfo;
PerStage<uint32_t> mBufferBindingCount;
};
}} // namespace dawn_native::metal
#endif // DAWNNATIVE_METAL_PIPELINELAYOUTMTL_H_