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render: Fixed a FIXME for SDL_SetRenderViewport with a negative size.

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Ryan C. Gordon 2024-09-25 12:32:50 -04:00
parent 54459def69
commit 7a6a0becb8
2 changed files with 11 additions and 1 deletions
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8
include/SDL3/SDL_render.h
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@ -1400,12 +1400,20 @@ extern SDL_DECLSPEC bool SDLCALL SDL_ConvertEventToRenderCoordinates(SDL_Rendere
/**
* Set the drawing area for rendering on the current target.
*
* Drawing will clip to this area (separately from any clipping done with
* SDL_SetRenderClipRect), and the top left of the area will become
* coordinate (0, 0) for future drawing commands.
*
* The area's width and height must be >= 0.
*
* \param renderer the rendering context.
* \param rect the SDL_Rect structure representing the drawing area, or NULL
* to set the viewport to the entire target.
* \returns true on success or false on failure; call SDL_GetError() for more
* information.
*
* \threadsafety You may only call this function from the main thread.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetRenderViewport

4
src/render/SDL_render.c
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@ -2932,7 +2932,9 @@ bool SDL_SetRenderViewport(SDL_Renderer *renderer, const SDL_Rect *rect)
CHECK_RENDERER_MAGIC(renderer, false);
if (rect) {
// !!! FIXME: fail if rect->w or rect->h are negative (we use this to mean "the whole viewport").
if ((rect->w < 0) || (rect->h < 0)) {
return SDL_SetError("rect has a negative size");
}
SDL_copyp(&renderer->view->viewport, rect);
} else {
renderer->view->viewport.x = 0;