mirror of
https://github.com/thorvg/thorvg.git
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5fe9b432ec
enhance decoding efficiency by determining the desired canvas format during image loading. This allows loaders to preemptively decode the image in the specified format, to not convert the format again.
150 lines
No EOL
4.1 KiB
C++
150 lines
No EOL
4.1 KiB
C++
/*
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* Copyright (c) 2021 - 2024 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <memory.h>
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#include "tvgLoader.h"
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#include "tvgPngLoader.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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void PngLoader::run(unsigned tid)
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{
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auto width = static_cast<unsigned>(w);
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auto height = static_cast<unsigned>(h);
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state.info_raw.colortype = LCT_RGBA; //request this image format
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if (lodepng_decode(&surface.buf8, &width, &height, &state, data, size)) {
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TVGERR("PNG", "Failed to decode image");
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}
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//setup the surface
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surface.stride = width;
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surface.w = width;
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surface.h = height;
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surface.cs = ColorSpace::ABGR8888;
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surface.channelSize = sizeof(uint32_t);
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if (state.info_png.color.colortype == LCT_RGBA) surface.premultiplied = false;
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else surface.premultiplied = true;
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}
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/************************************************************************/
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/* External Class Implementation */
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/************************************************************************/
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PngLoader::PngLoader() : ImageLoader(FileType::Png)
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{
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lodepng_state_init(&state);
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}
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PngLoader::~PngLoader()
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{
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if (freeData) free(data);
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free(surface.buf8);
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lodepng_state_cleanup(&state);
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}
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bool PngLoader::open(const string& path)
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{
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auto pngFile = fopen(path.c_str(), "rb");
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if (!pngFile) return false;
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auto ret = false;
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//determine size
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if (fseek(pngFile, 0, SEEK_END) < 0) goto finalize;
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if (((size = ftell(pngFile)) < 1)) goto finalize;
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if (fseek(pngFile, 0, SEEK_SET)) goto finalize;
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data = (unsigned char *) malloc(size);
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if (!data) goto finalize;
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freeData = true;
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if (fread(data, size, 1, pngFile) < 1) goto finalize;
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lodepng_state_init(&state);
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unsigned int width, height;
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if (lodepng_inspect(&width, &height, &state, data, size) > 0) goto finalize;
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w = static_cast<float>(width);
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h = static_cast<float>(height);
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ret = true;
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goto finalize;
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finalize:
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fclose(pngFile);
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return ret;
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}
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bool PngLoader::open(const char* data, uint32_t size, TVG_UNUSED const string& rpath, bool copy)
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{
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unsigned int width, height;
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if (lodepng_inspect(&width, &height, &state, (unsigned char*)(data), size) > 0) return false;
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if (copy) {
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this->data = (unsigned char *) malloc(size);
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if (!this->data) return false;
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memcpy((unsigned char *)this->data, data, size);
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freeData = true;
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} else {
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this->data = (unsigned char *) data;
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freeData = false;
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}
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w = static_cast<float>(width);
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h = static_cast<float>(height);
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this->size = size;
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return true;
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}
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bool PngLoader::read()
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{
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if (!data || w == 0 || h == 0) return false;
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if (!LoadModule::read()) return true;
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TaskScheduler::request(this);
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return true;
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}
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Surface* PngLoader::bitmap()
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{
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this->done();
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return ImageLoader::bitmap();
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} |