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

SDL_RenderWindowToLogical

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

Header File

Defined in SDL_render.h, but apps should only #include "SDL.h"!

Syntax

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

Function Parameters

renderer	the renderer from which the logical coordinates should be calculated
windowX	the real X coordinate in the window
windowY	the real Y coordinate in the window
logicalX	the pointer filled with the logical x coordinate
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.