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// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "Common/Image.h"
#include <string>
#include <vector>
#include <png.h>
#include "Common/CommonTypes.h"
namespace Common
{
bool LoadPNG(const std::vector<u8>& input, std::vector<u8>* data_out, u32* width_out,
u32* height_out)
{
// Using the 'Simplified API' of libpng; see section V in the libpng manual.
// Read header
png_image png = {};
png.version = PNG_IMAGE_VERSION;
if (!png_image_begin_read_from_memory(&png, input.data(), input.size()))
return false;
// Prepare output vector
png.format = PNG_FORMAT_RGBA;
size_t png_size = PNG_IMAGE_SIZE(png);
data_out->resize(png_size);
// Convert to RGBA and write into output vector
if (!png_image_finish_read(&png, nullptr, data_out->data(), 0, nullptr))
return false;
*width_out = png.width;
*height_out = png.height;
return true;
}
bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u32 width,
u32 height, int stride)
{
png_image png = {};
png.version = PNG_IMAGE_VERSION;
png.width = width;
png.height = height;
switch (format)
{
case ImageByteFormat::RGB:
png.format = PNG_FORMAT_RGB;
break;
case ImageByteFormat::RGBA:
png.format = PNG_FORMAT_RGBA;
break;
default:
return false;
}
png_image_write_to_file(&png, path.c_str(), 0, input, stride, nullptr);
if (png.warning_or_error & PNG_IMAGE_ERROR)
return false;
return true;
}
} // namespace Common
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