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