SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

SDL_ReadSurfacePixelFloat

Retrieves a single pixel from a surface.

Header File

Defined in <SDL3/SDL_surface.h>

Syntax

SDL_bool SDL_ReadSurfacePixelFloat(SDL_Surface *surface, int x, int y, float *r, float *g, float *b, float *a);

Function Parameters

SDL_Surface * surface the surface to read.
int x the horizontal coordinate, 0 <= x < width.
int y the vertical coordinate, 0 <= y < height.
float * r a pointer filled in with the red channel, normally in the range 0-1, or NULL to ignore this channel.
float * g a pointer filled in with the green channel, normally in the range 0-1, or NULL to ignore this channel.
float * b a pointer filled in with the blue channel, normally in the range 0-1, or NULL to ignore this channel.
float * a a pointer filled in with the alpha channel, normally in the range 0-1, or NULL to ignore this channel.

Return Value

(SDL_bool) Returns SDL_TRUE on success or SDL_FALSE on failure; call SDL_GetError() for more information.

Remarks

This function prioritizes correctness over speed: it is suitable for unit tests, but is not intended for use in a game engine.

Version

This function is available since SDL 3.0.0.


CategoryAPI, CategoryAPIFunction, CategorySurface


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.