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8b17e2ef62
Before this commit loadPNG() could return any surface format and the caller was responsible for converting it to the desired format. However, in practice all callers want a surface with an alpha channel and SDL only supports that with 32bpp surfaces, so RGBA or a permutation thereof. So I changed the contract for loadPNG() so it is required to return an RGBA surface, and removed the conversion code in the callers. The next step is to replace IMG_Load() by a function that calls libpng directly and loads a fixed 32bpp pixel format. That way, we can drop the SDL_image dependency and avoid unnecessary pixel format conversions.
13 lines
215 B
C++
13 lines
215 B
C++
#ifndef IMAGEIO_H
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#define IMAGEIO_H
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#include <string>
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struct SDL_Surface;
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/** Loads an image from a PNG file into a newly allocated 32bpp RGBA surface.
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*/
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SDL_Surface *loadPNG(const std::string &path);
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#endif
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