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The loader cache is applied to conserve memory. If the input data is already present in loaders, the loader cache will promptly return the active loader. This results in a lot of memory savings for the duplicated resources. binary diff: -400 bytes
125 lines
No EOL
3.5 KiB
C++
125 lines
No EOL
3.5 KiB
C++
/*
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* Copyright (c) 2020 - 2023 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 "tvgPngLoader.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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void PngLoader::clear()
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{
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png_image_free(image);
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free(image);
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image = nullptr;
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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() : LoadModule(FileType::Png)
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{
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image = static_cast<png_imagep>(calloc(1, sizeof(png_image)));
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image->version = PNG_IMAGE_VERSION;
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image->opaque = NULL;
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}
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PngLoader::~PngLoader()
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{
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clear();
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free((void*)content);
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}
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bool PngLoader::open(const string& path)
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{
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image->opaque = NULL;
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if (!png_image_begin_read_from_file(image, path.c_str())) return false;
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w = (float)image->width;
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h = (float)image->height;
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cs = ColorSpace::ARGB8888;
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return true;
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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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image->opaque = NULL;
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if (!png_image_begin_read_from_memory(image, data, size)) return false;
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w = (float)image->width;
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h = (float)image->height;
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cs = ColorSpace::ARGB8888;
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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 (!LoadModule::read()) return true;
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if (w == 0 || h == 0) return false;
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png_bytep buffer;
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image->format = PNG_FORMAT_BGRA;
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buffer = static_cast<png_bytep>(malloc(PNG_IMAGE_SIZE((*image))));
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if (!buffer) {
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//out of memory, only time when libpng doesnt free its data
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png_image_free(image);
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return false;
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}
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if (!png_image_finish_read(image, NULL, buffer, 0, NULL)) {
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free(buffer);
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return false;
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}
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content = reinterpret_cast<uint32_t*>(buffer);
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clear();
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return true;
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}
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unique_ptr<Surface> PngLoader::bitmap()
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{
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if (!content) return nullptr;
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//TODO: It's better to keep this surface instance in the loader side
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auto surface = new Surface;
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surface->buf32 = content;
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surface->stride = (uint32_t)w;
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surface->w = (uint32_t)w;
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surface->h = (uint32_t)h;
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surface->cs = cs;
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surface->channelSize = sizeof(uint32_t);
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surface->owner = true;
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surface->premultiplied = false;
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return unique_ptr<Surface>(surface);
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} |