/*
* Copyright (c) 2021 - 2026 ThorVG project. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <turbojpeg.h>
#include "tvgJpgLoader.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
void JpgLoader::clear()
{
if (freeData) tvg::free(data);
data = nullptr;
size = 0;
freeData = false;
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
JpgLoader::JpgLoader() : ImageLoader(FileType::Jpg)
{
jpegDecompressor = tjInitDecompress();
}
JpgLoader::~JpgLoader()
{
clear();
tjDestroy(jpegDecompressor);
//This image is shared with raster engine.
tjFree(surface.buf8);
}
bool JpgLoader::open(const char* path)
{
#ifdef THORVG_FILE_IO_SUPPORT
if (!(data = (unsigned char*) LoadModule::open(path, size))) return false;
int width, height, subSample, colorSpace;
if (tjDecompressHeader3(jpegDecompressor, data, size, &width, &height, &subSample, &colorSpace) < 0) return false;
w = static_cast<float>(width);
h = static_cast<float>(height);
freeData = true;
return true;
#else
return false;
#endif
}
bool JpgLoader::open(const char* data, uint32_t size, TVG_UNUSED const char* rpath, bool copy)
{
int width, height, subSample, colorSpace;
if (tjDecompressHeader3(jpegDecompressor, (unsigned char *) data, size, &width, &height, &subSample, &colorSpace) < 0) return false;
if (copy) {
this->data = tvg::malloc<unsigned char>(size);
if (!this->data) return false;
memcpy((unsigned char *)this->data, data, size);
freeData = true;
} else {
this->data = (unsigned char *) data;
freeData = false;
}
w = static_cast<float>(width);
h = static_cast<float>(height);
this->size = size;
return true;
}
bool JpgLoader::read()
{
if (!LoadModule::read()) return true;
if (w == 0 || h == 0) return false;
//determine the image format
TJPF format;
if (ImageLoader::cs == ColorSpace::ARGB8888 || ImageLoader::cs == ColorSpace::ARGB8888S) {
format = TJPF_BGRX;
surface.cs = ColorSpace::ARGB8888;
} else {
format = TJPF_RGBX;
surface.cs = ColorSpace::ABGR8888;
}
auto image = (unsigned char *)tjAlloc(static_cast<int>(w) * static_cast<int>(h) * tjPixelSize[format]);
if (!image) return false;
//decompress jpg image
if (tjDecompress2(jpegDecompressor, data, size, image, static_cast<int>(w), 0, static_cast<int>(h), format, 0) < 0) {
TVGERR("JPG LOADER", "%s", tjGetErrorStr());
tjFree(image);
image = nullptr;
return false;
}
//setup the surface
surface.buf8 = image;
surface.stride = w;
surface.w = w;
surface.h = h;
surface.channelSize = sizeof(uint32_t);
surface.premultiplied = true;
clear();
return true;
}