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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/opengl/PipelineLayoutGL.h"
#include "common/BitSetIterator.h"
#include "dawn_native/BindGroupLayout.h"
#include "dawn_native/opengl/DeviceGL.h"
namespace dawn_native { namespace opengl {
PipelineLayout::PipelineLayout(Device* device, const PipelineLayoutDescriptor* descriptor)
: PipelineLayoutBase(device, descriptor) {
GLuint uboIndex = 0;
GLuint samplerIndex = 0;
GLuint sampledTextureIndex = 0;
GLuint ssboIndex = 0;
GLuint storageTextureIndex = 0;
for (BindGroupIndex group : IterateBitSet(GetBindGroupLayoutsMask())) {
const BindGroupLayoutBase* bgl = GetBindGroupLayout(group);
mIndexInfo[group].resize(bgl->GetBindingCount());
for (BindingIndex bindingIndex{0}; bindingIndex < bgl->GetBindingCount();
++bindingIndex) {
const BindingInfo& bindingInfo = bgl->GetBindingInfo(bindingIndex);
switch (bindingInfo.bindingType) {
case BindingInfoType::Buffer:
switch (bindingInfo.buffer.type) {
case wgpu::BufferBindingType::Uniform:
mIndexInfo[group][bindingIndex] = uboIndex;
uboIndex++;
break;
case wgpu::BufferBindingType::Storage:
case kInternalStorageBufferBinding:
case wgpu::BufferBindingType::ReadOnlyStorage:
mIndexInfo[group][bindingIndex] = ssboIndex;
ssboIndex++;
break;
case wgpu::BufferBindingType::Undefined:
UNREACHABLE();
}
break;
case BindingInfoType::Sampler:
mIndexInfo[group][bindingIndex] = samplerIndex;
samplerIndex++;
break;
case BindingInfoType::Texture:
case BindingInfoType::ExternalTexture:
mIndexInfo[group][bindingIndex] = sampledTextureIndex;
sampledTextureIndex++;
break;
case BindingInfoType::StorageTexture:
mIndexInfo[group][bindingIndex] = storageTextureIndex;
storageTextureIndex++;
break;
}
}
}
mNumSamplers = samplerIndex;
mNumSampledTextures = sampledTextureIndex;
}
const PipelineLayout::BindingIndexInfo& PipelineLayout::GetBindingIndexInfo() const {
return mIndexInfo;
}
GLuint PipelineLayout::GetTextureUnitsUsed() const {
return 0;
}
size_t PipelineLayout::GetNumSamplers() const {
return mNumSamplers;
}
size_t PipelineLayout::GetNumSampledTextures() const {
return mNumSampledTextures;
}
}} // namespace dawn_native::opengl