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// Copyright 2020 The Tint 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 "src/reader/spirv/usage.h"
#include <sstream>
namespace tint {
namespace reader {
namespace spirv {
Usage::Usage() {}
Usage::Usage(const Usage& other) = default;
Usage::~Usage() = default;
std::ostream& Usage::operator<<(std::ostream& out) const {
out << "Usage(";
if (IsSampler()) {
out << "Sampler(";
if (is_comparison_sampler_) {
out << " comparison";
}
out << " )";
}
if (IsTexture()) {
out << "Texture(";
if (is_sampled_) {
out << " is_sampled";
}
if (is_multisampled_) {
out << " ms";
}
if (is_depth_) {
out << " depth";
}
if (is_storage_read_) {
out << " read";
}
if (is_storage_write_) {
out << " write";
}
out << " )";
}
out << ")";
return out;
}
bool Usage::IsValid() const {
// Check sampler state internal consistency.
if (is_comparison_sampler_ && !is_sampler_) {
return false;
}
// Check texture state.
// |is_texture_| is implied by any of the later texture-based properties.
if ((IsStorageTexture() || is_sampled_ || is_multisampled_ || is_depth_) &&
!is_texture_) {
return false;
}
if (is_texture_) {
// Multisampled implies sampled.
if (is_multisampled_) {
if (!is_sampled_) {
return false;
}
}
// Depth implies sampled.
if (is_depth_) {
if (!is_sampled_) {
return false;
}
}
// Sampled can't be storage.
if (is_sampled_) {
if (IsStorageTexture()) {
return false;
}
}
// Storage can't be sampled.
if (IsStorageTexture()) {
if (is_sampled_) {
return false;
}
}
// Storage texture can't also be a sampler.
if (IsStorageTexture()) {
if (is_sampler_) {
return false;
}
}
// Can't be both read and write. This is a restriction in WebGPU.
if (is_storage_read_ && is_storage_write_) {
return false;
}
}
return true;
}
bool Usage::IsComplete() const {
if (!IsValid()) {
return false;
}
if (IsSampler()) {
return true;
}
if (IsTexture()) {
return is_sampled_ || IsStorageTexture();
}
return false;
}
bool Usage::operator==(const Usage& other) const {
return is_sampler_ == other.is_sampler_ &&
is_comparison_sampler_ == other.is_comparison_sampler_ &&
is_texture_ == other.is_texture_ && is_sampled_ == other.is_sampled_ &&
is_multisampled_ == other.is_multisampled_ &&
is_depth_ == other.is_depth_ &&
is_storage_read_ == other.is_storage_read_ &&
is_storage_write_ == other.is_storage_write_;
}
void Usage::Add(const Usage& other) {
is_sampler_ = is_sampler_ || other.is_sampler_;
is_comparison_sampler_ =
is_comparison_sampler_ || other.is_comparison_sampler_;
is_texture_ = is_texture_ || other.is_texture_;
is_sampled_ = is_sampled_ || other.is_sampled_;
is_multisampled_ = is_multisampled_ || other.is_multisampled_;
is_depth_ = is_depth_ || other.is_depth_;
is_storage_read_ = is_storage_read_ || other.is_storage_read_;
is_storage_write_ = is_storage_write_ || other.is_storage_write_;
}
void Usage::AddSampler() {
is_sampler_ = true;
}
void Usage::AddComparisonSampler() {
AddSampler();
is_comparison_sampler_ = true;
}
void Usage::AddTexture() {
is_texture_ = true;
}
void Usage::AddStorageReadTexture() {
AddTexture();
is_storage_read_ = true;
}
void Usage::AddStorageWriteTexture() {
AddTexture();
is_storage_write_ = true;
}
void Usage::AddSampledTexture() {
AddTexture();
is_sampled_ = true;
}
void Usage::AddMultisampledTexture() {
AddSampledTexture();
is_multisampled_ = true;
}
void Usage::AddDepthTexture() {
AddSampledTexture();
is_depth_ = true;
}
std::string Usage::to_str() const {
std::ostringstream ss;
ss << *this;
return ss.str();
}
} // namespace spirv
} // namespace reader
} // namespace tint