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// Copyright 2020 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_BINDINGINFO_H_
#define DAWNNATIVE_BINDINGINFO_H_
#include "common/Constants.h"
#include "common/ityp_array.h"
#include "dawn_native/Error.h"
#include "dawn_native/Format.h"
#include "dawn_native/IntegerTypes.h"
#include "dawn_native/PerStage.h"
#include "dawn_native/dawn_platform.h"
#include <cstdint>
namespace dawn_native {
// Not a real WebGPU limit, but the sum of the two limits is useful for internal optimizations.
static constexpr uint32_t kMaxDynamicBuffersPerPipelineLayout =
kMaxDynamicUniformBuffersPerPipelineLayout + kMaxDynamicStorageBuffersPerPipelineLayout;
static constexpr BindingIndex kMaxDynamicBuffersPerPipelineLayoutTyped =
BindingIndex(kMaxDynamicBuffersPerPipelineLayout);
// Not a real WebGPU limit, but used to optimize parts of Dawn which expect valid usage of the
// API. There should never be more bindings than the max per stage, for each stage.
static constexpr uint32_t kMaxBindingsPerPipelineLayout =
3 * (kMaxSampledTexturesPerShaderStage + kMaxSamplersPerShaderStage +
kMaxStorageBuffersPerShaderStage + kMaxStorageTexturesPerShaderStage +
kMaxUniformBuffersPerShaderStage);
static constexpr BindingIndex kMaxBindingsPerPipelineLayoutTyped =
BindingIndex(kMaxBindingsPerPipelineLayout);
// TODO(enga): Figure out a good number for this.
static constexpr uint32_t kMaxOptimalBindingsPerGroup = 32;
enum class BindingInfoType { Buffer, Sampler, Texture, StorageTexture, ExternalTexture };
struct BindingInfo {
BindingNumber binding;
wgpu::ShaderStage visibility;
BindingInfoType bindingType;
// TODO(dawn:527): These four values could be made into a union.
BufferBindingLayout buffer;
SamplerBindingLayout sampler;
TextureBindingLayout texture;
StorageTextureBindingLayout storageTexture;
};
struct BindingSlot {
BindGroupIndex group;
BindingNumber binding;
};
struct PerStageBindingCounts {
uint32_t sampledTextureCount;
uint32_t samplerCount;
uint32_t storageBufferCount;
uint32_t storageTextureCount;
uint32_t uniformBufferCount;
uint32_t externalTextureCount;
};
struct BindingCounts {
uint32_t totalCount;
uint32_t bufferCount;
uint32_t unverifiedBufferCount; // Buffers with minimum buffer size unspecified
uint32_t dynamicUniformBufferCount;
uint32_t dynamicStorageBufferCount;
PerStage<PerStageBindingCounts> perStage;
};
void IncrementBindingCounts(BindingCounts* bindingCounts, const BindGroupLayoutEntry& entry);
void AccumulateBindingCounts(BindingCounts* bindingCounts, const BindingCounts& rhs);
MaybeError ValidateBindingCounts(const BindingCounts& bindingCounts);
// For buffer size validation
using RequiredBufferSizes = ityp::array<BindGroupIndex, std::vector<uint64_t>, kMaxBindGroups>;
} // namespace dawn_native
#endif // DAWNNATIVE_BINDINGINFO_H_