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Added SDL_GetRenderSafeArea()

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This commit is contained in:
Sam Lantinga 2024-07-24 17:14:00 -07:00
parent eb09264076
commit cf8b158ccb
7 changed files with 81 additions and 4 deletions
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47
src/render/SDL_render.c
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@ -2999,6 +2999,53 @@ static void GetRenderViewportSize(SDL_Renderer *renderer, SDL_FRect *rect)
}
}
int SDL_GetRenderSafeArea(SDL_Renderer *renderer, SDL_Rect *rect)
{
if (rect) {
SDL_zerop(rect);
}
CHECK_RENDERER_MAGIC(renderer, -1);
if (renderer->target || !renderer->window) {
// The entire viewport is safe for rendering
return SDL_GetRenderViewport(renderer, rect);
}
if (rect) {
// Get the window safe rect
SDL_Rect safe;
if (SDL_GetWindowSafeArea(renderer->window, &safe) < 0) {
return -1;
}
// Convert the coordinates into the render space
float minx = (float)safe.x;
float miny = (float)safe.y;
float maxx = (float)safe.x + safe.w;
float maxy = (float)safe.y + safe.h;
if (SDL_RenderCoordinatesFromWindow(renderer, minx, miny, &minx, &miny) < 0 ||
SDL_RenderCoordinatesFromWindow(renderer, maxx, maxy, &maxx, &maxy) < 0) {
return -1;
}
rect->x = (int)SDL_ceilf(minx);
rect->y = (int)SDL_ceilf(miny);
rect->w = (int)SDL_ceilf(maxx - minx);
rect->h = (int)SDL_ceilf(maxy - miny);
// Clip with the viewport
SDL_Rect viewport;
if (SDL_GetRenderViewport(renderer, &viewport) < 0) {
return -1;
}
if (!SDL_GetRectIntersection(rect, &viewport, rect)) {
return SDL_SetError("No safe area within viewport");
}
}
return 0;
}
int SDL_SetRenderClipRect(SDL_Renderer *renderer, const SDL_Rect *rect)
{
CHECK_RENDERER_MAGIC(renderer, -1)