(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_RenderCoordinatesFromWindow

Get a point in render coordinates when given a point in window coordinates.

Header File

Defined in <SDL3/SDL_render.h>

Syntax

bool SDL_RenderCoordinatesFromWindow(SDL_Renderer *renderer, float window_x, float window_y, float *x, float *y);

Function Parameters

SDL_Renderer *	renderer	the rendering context.
float	window_x	the x coordinate in window coordinates.
float	window_y	the y coordinate in window coordinates.
float *	x	a pointer filled with the x coordinate in render coordinates.
float *	y	a pointer filled with the y coordinate in render coordinates.

Return Value

(bool) Returns true on success or false on failure; call SDL_GetError() for more information.

Remarks

This takes into account several states:

• The window dimensions.
• The logical presentation settings (SDL_SetRenderLogicalPresentation)
• The scale (SDL_SetRenderScale)
• The viewport (SDL_SetRenderViewport)

Thread Safety

You may only call this function from the main thread.

Version

This function is available since SDL 3.1.3.

See Also

• SDL_SetRenderLogicalPresentation
• SDL_SetRenderScale

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CategoryAPI, CategoryAPIFunction, CategoryRender

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