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gl_shader_disk_cache: Use better compression for transferable and precompiled shader disk chache files

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This commit is contained in:
unknown 2019-02-07 19:18:49 +01:00
parent 798d76f4c7
commit 74cee1b65d
3 changed files with 26 additions and 10 deletions
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24
src/common/data_compression.cpp
View file

@ -4,14 +4,14 @@
#pragma once
#include <lz4.h>
#include <lz4hc.h>
#include "data_compression.h"
namespace Compression {
std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) {
std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size,
bool use_LZ4_high_compression) {
if (source_size > LZ4_MAX_INPUT_SIZE) {
// Source size exceeds LZ4 maximum input size
return {};
@ -19,9 +19,18 @@ std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) {
const auto source_size_int = static_cast<int>(source_size);
const int max_compressed_size = LZ4_compressBound(source_size_int);
std::vector<u8> compressed(max_compressed_size);
const int compressed_size = LZ4_compress_default(reinterpret_cast<const char*>(source),
reinterpret_cast<char*>(compressed.data()),
source_size_int, max_compressed_size);
int compressed_size = 0;
if (use_LZ4_high_compression) {
compressed_size = LZ4_compress_HC(reinterpret_cast<const char*>(source),
reinterpret_cast<char*>(compressed.data()),
source_size_int, max_compressed_size, LZ4HC_CLEVEL_MAX);
} else {
compressed_size = LZ4_compress_default(reinterpret_cast<const char*>(source),
reinterpret_cast<char*>(compressed.data()),
source_size_int, max_compressed_size);
}
if (compressed_size <= 0) {
// Compression failed
return {};
@ -30,7 +39,8 @@ std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size) {
return compressed;
}
std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size) {
std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed,
std::size_t uncompressed_size) {
std::vector<u8> uncompressed(uncompressed_size);
const int size_check = LZ4_decompress_safe(reinterpret_cast<const char*>(compressed.data()),
reinterpret_cast<char*>(uncompressed.data()),

8
src/common/data_compression.h
View file

@ -10,7 +10,13 @@
namespace Compression {
std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size);
// Compresses a source memory region with LZ4 and returns the compressed data in an vector. If
// use_LZ4_high_compression is true, the LZ4 subalgortihmn LZ4HC is used with the highst possible
// compression level. This results in a smaller compressed size, but requires more CPU time for
// compression. Data compressed with LZ4HC can also be decompressed with the default LZ4
// decompression function.
std::vector<u8> CompressDataLZ4(const u8* source, std::size_t source_size,
bool use_LZ4_high_compression);
std::vector<u8> DecompressDataLZ4(const std::vector<u8>& compressed, std::size_t uncompressed_size);