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/*
* Copyright (c) 2021 - 2022 Samsung Electronics Co., Ltd. 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 <memory.h>
#include "tvgLoader.h"
#include "tvgPngLoader.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
static inline uint32_t PREMULTIPLY(uint32_t c)
{
auto a = (c >> 24);
return (c & 0xff000000) + ((((c >> 8) & 0xff) * a) & 0xff00) + ((((c & 0x00ff00ff) * a) >> 8) & 0x00ff00ff);
}
static void _premultiply(uint32_t* data, uint32_t w, uint32_t h)
{
auto buffer = data;
for (uint32_t y = 0; y < h; ++y, buffer += w) {
auto src = buffer;
for (uint32_t x = 0; x < w; ++x, ++src) {
*src = PREMULTIPLY(*src);
}
}
}
void PngLoader::clear()
{
lodepng_state_cleanup(&state);
if (freeData) free(data);
data = nullptr;
size = 0;
freeData = false;
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
PngLoader::PngLoader()
{
lodepng_state_init(&state);
}
PngLoader::~PngLoader()
{
if (freeData) free(data);
free(image);
}
bool PngLoader::open(const string& path)
{
clear();
auto pngFile = fopen(path.c_str(), "rb");
if (!pngFile) return false;
auto ret = false;
//determine size
if (fseek(pngFile, 0, SEEK_END) < 0) goto finalize;
if (((size = ftell(pngFile)) < 1)) goto finalize;
if (fseek(pngFile, 0, SEEK_SET)) goto finalize;
data = (unsigned char *) malloc(size);
if (!data) goto finalize;
freeData = true;
if (fread(data, size, 1, pngFile) < 1) goto failure;
lodepng_state_init(&state);
unsigned int width, height;
if (lodepng_inspect(&width, &height, &state, data, size) > 0) goto failure;
w = static_cast<float>(width);
h = static_cast<float>(height);
ret = true;
goto finalize;
failure:
clear();
finalize:
fclose(pngFile);
return ret;
}
bool PngLoader::open(const char* data, uint32_t size, bool copy)
{
clear();
lodepng_state_init(&state);
unsigned int width, height;
if (lodepng_inspect(&width, &height, &state, (unsigned char*)(data), size) > 0) return false;
if (copy) {
this->data = (unsigned char *) malloc(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 PngLoader::read()
{
if (!data || w <= 0 || h <= 0) return false;
TaskScheduler::request(this);
return true;
}
bool PngLoader::close()
{
this->done();
clear();
return true;
}
unique_ptr<Surface> PngLoader::bitmap()
{
this->done();
if (!image) return nullptr;
auto surface = static_cast<Surface*>(malloc(sizeof(Surface)));
surface->buffer = (uint32_t*)(image);
surface->stride = w;
surface->w = w;
surface->h = h;
surface->cs = SwCanvas::ARGB8888;
return unique_ptr<Surface>(surface);
}
void PngLoader::run(unsigned tid)
{
if (image) {
free(image);
image = nullptr;
}
auto width = static_cast<unsigned>(w);
auto height = static_cast<unsigned>(h);
lodepng_decode(&image, &width, &height, &state, data, size);
_premultiply((uint32_t*)(image), width, height);
}
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