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Common: Add SavePNG() function that writes PNGs using the simplified libpng API.

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This commit is contained in:
Admiral H. Curtiss 2020-11-26 04:34:51 +01:00
parent 4c9ffb58fa
commit 2de3b12e9d
2 changed files with 39 additions and 1 deletions
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28
Source/Core/Common/Image.cpp
View File

@ -4,6 +4,7 @@
#include "Common/Image.h" #include "Common/Image.h"
#include <string>
#include <vector> #include <vector>
#include <png.h> #include <png.h>
@ -37,4 +38,31 @@ bool LoadPNG(const std::vector<u8>& input, std::vector<u8>* data_out, u32* width
return true; 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 } // namespace Common

12
Source/Core/Common/Image.h
View File

@ -4,6 +4,7 @@
#pragma once #pragma once
#include <string>
#include <vector> #include <vector>
#include "Common/CommonTypes.h" #include "Common/CommonTypes.h"
@ -12,4 +13,13 @@ namespace Common
{ {
bool LoadPNG(const std::vector<u8>& input, std::vector<u8>* data_out, u32* width_out, bool LoadPNG(const std::vector<u8>& input, std::vector<u8>* data_out, u32* width_out,
u32* height_out); u32* height_out);
}
enum class ImageByteFormat
{
RGB,
RGBA,
};
bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u32 width,
u32 height, int stride = 0);
} // namespace Common