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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/BindGroupLayout.h"
#include "common/BitSetIterator.h"
#include "common/HashUtils.h"
#include "dawn_native/Device.h"
#include "dawn_native/ValidationUtils_autogen.h"
#include <functional>
namespace dawn_native {
MaybeError ValidateBindGroupLayoutDescriptor(DeviceBase*,
const BindGroupLayoutDescriptor* descriptor) {
if (descriptor->nextInChain != nullptr) {
return DAWN_VALIDATION_ERROR("nextInChain must be nullptr");
}
std::bitset<kMaxBindingsPerGroup> bindingsSet;
uint32_t dynamicUniformBufferCount = 0;
uint32_t dynamicStorageBufferCount = 0;
for (uint32_t i = 0; i < descriptor->bindingCount; ++i) {
const BindGroupLayoutBinding& binding = descriptor->bindings[i];
DAWN_TRY(ValidateShaderStage(binding.visibility));
DAWN_TRY(ValidateBindingType(binding.type));
DAWN_TRY(ValidateTextureComponentType(binding.textureComponentType));
if (binding.textureDimension != wgpu::TextureViewDimension::Undefined) {
DAWN_TRY(ValidateTextureViewDimension(binding.textureDimension));
}
if (binding.binding >= kMaxBindingsPerGroup) {
return DAWN_VALIDATION_ERROR("some binding index exceeds the maximum value");
}
if (bindingsSet[binding.binding]) {
return DAWN_VALIDATION_ERROR("some binding index was specified more than once");
}
if (binding.type == wgpu::BindingType::StorageBuffer &&
(binding.visibility & wgpu::ShaderStage::Vertex) != 0) {
return DAWN_VALIDATION_ERROR(
"storage buffer binding is not supported in vertex shader");
}
switch (binding.type) {
case wgpu::BindingType::UniformBuffer:
if (binding.hasDynamicOffset) {
++dynamicUniformBufferCount;
}
break;
case wgpu::BindingType::StorageBuffer:
case wgpu::BindingType::ReadonlyStorageBuffer:
if (binding.hasDynamicOffset) {
++dynamicStorageBufferCount;
}
break;
case wgpu::BindingType::SampledTexture:
case wgpu::BindingType::Sampler:
if (binding.hasDynamicOffset) {
return DAWN_VALIDATION_ERROR("Samplers and textures cannot be dynamic");
}
break;
case wgpu::BindingType::StorageTexture:
return DAWN_VALIDATION_ERROR("storage textures aren't supported (yet)");
}
if (binding.multisampled) {
return DAWN_VALIDATION_ERROR(
"BindGroupLayoutBinding::multisampled must be false (for now)");
}
bindingsSet.set(binding.binding);
}
if (dynamicUniformBufferCount > kMaxDynamicUniformBufferCount) {
return DAWN_VALIDATION_ERROR(
"The number of dynamic uniform buffer exceeds the maximum value");
}
if (dynamicStorageBufferCount > kMaxDynamicStorageBufferCount) {
return DAWN_VALIDATION_ERROR(
"The number of dynamic storage buffer exceeds the maximum value");
}
return {};
}
namespace {
size_t HashBindingInfo(const BindGroupLayoutBase::LayoutBindingInfo& info) {
size_t hash = Hash(info.mask);
HashCombine(&hash, info.hasDynamicOffset, info.multisampled);
for (uint32_t binding : IterateBitSet(info.mask)) {
HashCombine(&hash, info.visibilities[binding], info.types[binding],
info.textureComponentTypes[binding], info.textureDimensions[binding]);
}
return hash;
}
bool operator==(const BindGroupLayoutBase::LayoutBindingInfo& a,
const BindGroupLayoutBase::LayoutBindingInfo& b) {
if (a.mask != b.mask || a.hasDynamicOffset != b.hasDynamicOffset ||
a.multisampled != b.multisampled) {
return false;
}
for (uint32_t binding : IterateBitSet(a.mask)) {
if ((a.visibilities[binding] != b.visibilities[binding]) ||
(a.types[binding] != b.types[binding]) ||
(a.textureComponentTypes[binding] != b.textureComponentTypes[binding]) ||
(a.textureDimensions[binding] != b.textureDimensions[binding])) {
return false;
}
}
return true;
}
} // namespace
// BindGroupLayoutBase
BindGroupLayoutBase::BindGroupLayoutBase(DeviceBase* device,
const BindGroupLayoutDescriptor* descriptor)
: CachedObject(device) {
for (uint32_t i = 0; i < descriptor->bindingCount; ++i) {
auto& binding = descriptor->bindings[i];
uint32_t index = binding.binding;
mBindingInfo.visibilities[index] = binding.visibility;
mBindingInfo.types[index] = binding.type;
mBindingInfo.textureComponentTypes[index] = binding.textureComponentType;
if (binding.textureDimension == wgpu::TextureViewDimension::Undefined) {
mBindingInfo.textureDimensions[index] = wgpu::TextureViewDimension::e2D;
} else {
mBindingInfo.textureDimensions[index] = binding.textureDimension;
}
if (binding.hasDynamicOffset) {
mBindingInfo.hasDynamicOffset.set(index);
switch (binding.type) {
case wgpu::BindingType::UniformBuffer:
++mDynamicUniformBufferCount;
break;
case wgpu::BindingType::StorageBuffer:
case wgpu::BindingType::ReadonlyStorageBuffer:
++mDynamicStorageBufferCount;
break;
case wgpu::BindingType::SampledTexture:
case wgpu::BindingType::Sampler:
case wgpu::BindingType::StorageTexture:
UNREACHABLE();
break;
}
}
mBindingInfo.multisampled.set(index, binding.multisampled);
ASSERT(!mBindingInfo.mask[index]);
mBindingInfo.mask.set(index);
}
}
BindGroupLayoutBase::BindGroupLayoutBase(DeviceBase* device, ObjectBase::ErrorTag tag)
: CachedObject(device, tag) {
}
BindGroupLayoutBase::~BindGroupLayoutBase() {
// Do not uncache the actual cached object if we are a blueprint
if (IsCachedReference()) {
GetDevice()->UncacheBindGroupLayout(this);
}
}
// static
BindGroupLayoutBase* BindGroupLayoutBase::MakeError(DeviceBase* device) {
return new BindGroupLayoutBase(device, ObjectBase::kError);
}
const BindGroupLayoutBase::LayoutBindingInfo& BindGroupLayoutBase::GetBindingInfo() const {
ASSERT(!IsError());
return mBindingInfo;
}
size_t BindGroupLayoutBase::HashFunc::operator()(const BindGroupLayoutBase* bgl) const {
return HashBindingInfo(bgl->mBindingInfo);
}
bool BindGroupLayoutBase::EqualityFunc::operator()(const BindGroupLayoutBase* a,
const BindGroupLayoutBase* b) const {
return a->mBindingInfo == b->mBindingInfo;
}
uint32_t BindGroupLayoutBase::GetDynamicBufferCount() const {
return mDynamicStorageBufferCount + mDynamicUniformBufferCount;
}
uint32_t BindGroupLayoutBase::GetDynamicUniformBufferCount() const {
return mDynamicUniformBufferCount;
}
uint32_t BindGroupLayoutBase::GetDynamicStorageBufferCount() const {
return mDynamicStorageBufferCount;
}
} // namespace dawn_native