82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
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#include "TextureAsset.hpp"
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#include <lz4.h>
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#include <nlohmann/json.hpp>
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namespace Assets {
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using namespace nlohmann;
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TextureInfo read_texture_info(AssetFile* file)
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{
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json texture_meta_data = json::parse(file->json);
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return TextureInfo {
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.size = texture_meta_data["bufferSize"],
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.compression_mode = texture_meta_data["compression"],
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.format = texture_meta_data["format"],
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.pixel_size = {
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texture_meta_data["width"],
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texture_meta_data["height"],
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0,
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},
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.original_file = texture_meta_data["originalFile"],
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};
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}
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void unpack_texture(
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TextureInfo* info,
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const void* source_buffer,
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size_t source_size,
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void* destination
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)
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{
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if (info->compression_mode == CompressionMode::LZ4)
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{
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LZ4_decompress_safe(
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(const char*)source_buffer,
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(char*)destination,
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source_size,
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info->size
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);
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}
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else
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{
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memcpy(destination, source_buffer, source_size);
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}
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}
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AssetFile pack_texture(TextureInfo* info, void* pixel_data)
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{
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json metadata;
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metadata["format"] = info->format;
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metadata["width"] = info->pixel_size[0];
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metadata["height"] = info->pixel_size[1];
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metadata["bufferSize"] = info->size;
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metadata["originalFile"] = info->original_file;
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metadata["compression"] = CompressionMode::LZ4;
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AssetFile file;
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file.type = AssetFile::Type::Texture;
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file.version = 1u;
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const int compress_staging = LZ4_compressBound(info->size);
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file.blob.resize(compress_staging);
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const int compression_size = LZ4_compress_default(
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(const char*)pixel_data,
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(char*)file.blob.data(),
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info->size,
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compress_staging
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);
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file.blob.resize(compression_size);
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metadata["compression"] = CompressionMode::LZ4;
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file.json = metadata.dump();
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return file;
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}
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} // namespace Assets
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