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https://github.com/TerryCavanagh/VVVVVV.git
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351a022ebd
colourTransform is a struct with only one member, a Uint32. The issue with `Uint32`s is that it requires a bunch of bit shifting logic to edit the colors. The issue with bit shifting logic is that people have a tendency to hardcode the shift amounts instead of using the shift amount variables of the SDL_PixelFormat, which makes it annoying to change the color masks of surfaces. This commit fixes both issues by unhardcoding the bit shift amounts in DrawPixel and ReadPixel, and by axing the `Uint32`s in favor of using SDL_Color. According to the SDL_PixelFormat documentation ( https://wiki.libsdl.org/SDL2/SDL_PixelFormat ), the logic to read and draw to pixels from colors below 32-bit was just wrong. Specifically, for 8-bit, there's a color palette used instead of some intrinsic color information stored in the pixel itself. But we shouldn't need that logic anyways because we don't use colors below 32-bit. So I axed that too.
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#ifndef GRAPHICSUTIL_H
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#define GRAPHICSUTIL_H
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#include <SDL.h>
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void setRect(SDL_Rect& _r, int x, int y, int w, int h);
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SDL_Surface* GetSubSurface( SDL_Surface* metaSurface, int x, int y, int width, int height );
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SDL_Color ReadPixel(const SDL_Surface* surface, int x, int y);
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SDL_Surface * ScaleSurface( SDL_Surface *Surface, int Width, int Height, SDL_Surface * Dest = NULL );
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void BlitSurfaceStandard( SDL_Surface* _src, SDL_Rect* _srcRect, SDL_Surface* _dest, SDL_Rect* _destRect );
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void BlitSurfaceColoured(SDL_Surface* src, const SDL_Rect* src_rect, SDL_Surface* dest, SDL_Rect* dest_rect, SDL_Color color);
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void BlitSurfaceTinted(SDL_Surface* src, const SDL_Rect* src_rect, SDL_Surface* dest, SDL_Rect* dest_rect, SDL_Color color);
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void FillRect( SDL_Surface* surface, const int x, const int y, const int w, const int h, const int r, int g, int b );
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void FillRect( SDL_Surface* surface, const int r, int g, int b );
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void FillRect( SDL_Surface* surface, SDL_Rect& rect, const int r, int g, int b );
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void FillRect(SDL_Surface* surface, SDL_Rect rect, SDL_Color color);
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void FillRect(SDL_Surface* surface, SDL_Color color);
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void FillRect(SDL_Surface* surface, int x, int y, int w, int h, SDL_Color color);
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void FillRect(SDL_Surface* surface, int r, int g, int b, int a);
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void ClearSurface(SDL_Surface* surface);
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void ScrollSurface(SDL_Surface* _src, int pX, int py);
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SDL_Surface * FlipSurfaceVerticle(SDL_Surface* _src);
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void UpdateFilter(void);
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SDL_Surface* ApplyFilter( SDL_Surface* _src );
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#endif /* GRAPHICSUTIL_H */
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