(This is the legacy documentation for SDL2, the previous stable version; SDL3 is the current stable version.)

SDL_RenderWindowToLogical

Get logical coordinates of point in renderer when given real coordinates of point in window.

Header File

Syntax

void SDL_RenderWindowToLogical(SDL_Renderer * renderer, 
                                    int windowX, int windowY, 
                                    float *logicalX, float *logicalY);

Function Parameters

SDL_Renderer *	renderer	the renderer from which the logical coordinates should be calculated.
int	windowX	the real X coordinate in the window.
int	windowY	the real Y coordinate in the window.
float *	logicalX	the pointer filled with the logical x coordinate.
float *	logicalY	the pointer filled with the logical y coordinate.

Remarks

Logical coordinates will differ from real coordinates when render is scaled and logical renderer size set

Version

This function is available since SDL 2.0.18.