mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-23 12:10:06 +00:00
250a235a8d
Add new "short descriptor" algorithm to MARK-V codec. Add three shader compression models: lite - fast, poor compression mid - balanced max - best compression
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
// Copyright (c) 2017 Google Inc.
|
|
//
|
|
// 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 LIBSPIRV_ID_DESCRIPTOR_H_
|
|
#define LIBSPIRV_ID_DESCRIPTOR_H_
|
|
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
|
|
#include "spirv-tools/libspirv.hpp"
|
|
|
|
namespace libspirv {
|
|
|
|
using CustomHashFunc = std::function<uint32_t(const std::vector<uint32_t>&)>;
|
|
|
|
// Computes and stores id descriptors.
|
|
//
|
|
// Descriptors are computed as hash of all words in the instruction where ids
|
|
// were substituted with previously computed descriptors.
|
|
class IdDescriptorCollection {
|
|
public:
|
|
explicit IdDescriptorCollection(
|
|
CustomHashFunc custom_hash_func = CustomHashFunc())
|
|
: custom_hash_func_(custom_hash_func) {
|
|
words_.reserve(16);
|
|
}
|
|
|
|
// Computes descriptor for the result id of the given instruction and
|
|
// registers it in id_to_descriptor_. Returns the computed descriptor.
|
|
// This function needs to be sequentially called for every instruction in the
|
|
// module.
|
|
uint32_t ProcessInstruction(const spv_parsed_instruction_t& inst);
|
|
|
|
// Returns a previously computed descriptor id.
|
|
uint32_t GetDescriptor(uint32_t id) const {
|
|
const auto it = id_to_descriptor_.find(id);
|
|
if (it == id_to_descriptor_.end()) return 0;
|
|
return it->second;
|
|
}
|
|
|
|
private:
|
|
std::unordered_map<uint32_t, uint32_t> id_to_descriptor_;
|
|
|
|
std::function<uint32_t(const std::vector<uint32_t>&)> custom_hash_func_;
|
|
|
|
// Scratch buffer used for hashing. Class member to optimize on allocation.
|
|
std::vector<uint32_t> words_;
|
|
};
|
|
|
|
} // namespace libspirv
|
|
|
|
#endif // LIBSPIRV_ID_DESCRIPTOR_H_
|