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SDL_RenderSetIntegerScale

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This commit is contained in:
Ethan Lee 2016-01-05 16:39:18 -05:00
parent 416d046663
commit 167cf14c1f
3 changed files with 58 additions and 1 deletions
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32
src/render/SDL_render.c
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@ -1154,7 +1154,19 @@ UpdateLogicalSize(SDL_Renderer *renderer)
/* Clear the scale because we're setting viewport in output coordinates */
SDL_RenderSetScale(renderer, 1.0f, 1.0f);
if (SDL_fabs(want_aspect-real_aspect) < 0.0001) {
if (renderer->integer_scale) {
if (want_aspect > real_aspect) {
scale = w / renderer->logical_w;
} else {
scale = h / renderer->logical_h;
}
viewport.w = (int)SDL_ceil(renderer->logical_w * scale);
viewport.x = (w - viewport.w) / 2;
viewport.h = (int)SDL_ceil(renderer->logical_h * scale);
viewport.y = (h - viewport.h) / 2;
SDL_RenderSetViewport(renderer, &viewport);
} else if (SDL_fabs(want_aspect-real_aspect) < 0.0001) {
/* The aspect ratios are the same, just scale appropriately */
scale = (float)w / renderer->logical_w;
SDL_RenderSetViewport(renderer, NULL);
@ -1215,6 +1227,24 @@ SDL_RenderGetLogicalSize(SDL_Renderer * renderer, int *w, int *h)
}
}
int
SDL_RenderSetIntegerScale(SDL_Renderer * renderer, SDL_bool enable)
{
CHECK_RENDERER_MAGIC(renderer, -1);
renderer->integer_scale = enable;
return UpdateLogicalSize(renderer);
}
SDL_bool
SDLCALL SDL_RenderGetIntegerScale(SDL_Renderer * renderer)
{
CHECK_RENDERER_MAGIC(renderer, SDL_FALSE);
return renderer->integer_scale;
}
int
SDL_RenderSetViewport(SDL_Renderer * renderer, const SDL_Rect * rect)
{