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/*
* Copyright (c) 2020 - 2023 the 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 "tvgLoader.h"
#include "tvgPngLoader.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
PngLoader::PngLoader()
{
image = static_cast<png_imagep>(calloc(1, sizeof(png_image)));
image->version = PNG_IMAGE_VERSION;
image->opaque = NULL;
}
PngLoader::~PngLoader()
{
if (content) {
free((void*)content);
content = nullptr;
}
free(image);
}
bool PngLoader::open(const string& path)
{
image->opaque = NULL;
if (!png_image_begin_read_from_file(image, path.c_str())) return false;
w = (float)image->width;
h = (float)image->height;
cs = ColorSpace::ARGB8888;
return true;
}
bool PngLoader::open(const char* data, uint32_t size, bool copy)
{
image->opaque = NULL;
if (!png_image_begin_read_from_memory(image, data, size)) return false;
w = (float)image->width;
h = (float)image->height;
cs = ColorSpace::ARGB8888;
return true;
}
bool PngLoader::read()
{
png_bytep buffer;
image->format = PNG_FORMAT_BGRA;
buffer = static_cast<png_bytep>(malloc(PNG_IMAGE_SIZE((*image))));
if (!buffer) {
//out of memory, only time when libpng doesnt free its data
png_image_free(image);
return false;
}
if (!png_image_finish_read(image, NULL, buffer, 0, NULL)) {
free(buffer);
return false;
}
content = reinterpret_cast<uint32_t*>(buffer);
return true;
}
bool PngLoader::close()
{
png_image_free(image);
return true;
}
unique_ptr<Surface> PngLoader::bitmap()
{
if (!content) return nullptr;
//TODO: It's better to keep this surface instance in the loader side
auto surface = new Surface;
surface->buf32 = content;
surface->stride = w;
surface->w = w;
surface->h = h;
surface->cs = cs;
surface->channelSize = sizeof(uint32_t);
surface->owner = true;
surface->premultiplied = false;
return unique_ptr<Surface>(surface);
}
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