SDL_ReadSurfacePixelFloat3
Retrieves a single pixel from a surface.
Usage
#include "SDL3/SDL.h"
bool SDL_ReadSurfacePixelFloat(SDL_Surface *surface, int x, int y, float *r, float *g, float *b, float *a);
Header file
Defined in SDL3/SDL_surface.h
Overview
This function prioritizes correctness over speed: it is suitable for unit tests, but is not intended for use in a game engine.
Function parameters
- surface
-
the surface to read.
- x
-
the horizontal coordinate, 0 <= x < width.
- y
-
the vertical coordinate, 0 <= y < height.
- r
-
a pointer filled in with the red channel, normally in the range 0-1, or NULL to ignore this channel.
- g
-
a pointer filled in with the green channel, normally in the range 0-1, or NULL to ignore this channel.
- b
-
a pointer filled in with the blue channel, normally in the range 0-1, or NULL to ignore this channel.
- a
-
a pointer filled in with the alpha channel, normally in the range 0-1, or NULL to ignore this channel.
Return value
Returns true on success or false on failure; call
SDL_GetError () for more information.
Thread safety
This function is not thread safe.