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video: Ensure render viewport is an integer multiple of logical size.

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This fixes most problems with floating labels and background redraws.
This commit is contained in:
Tommy 2022-05-03 19:17:32 +12:00
parent c627c96fa9
commit 1ac5b42e35
1 changed files with 7 additions and 2 deletions
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9
src/video.cpp
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@ -216,6 +216,11 @@ void CVideo::update_framebuffer()
return;
}
// Non-integer scales are not currently supported.
// This option makes things neater when window size is not a perfect
// multiple of logical size, which can happen when manually resizing.
SDL_RenderSetIntegerScale(*window, SDL_TRUE);
// Find max valid pixel scale at current window size.
point wsize(window->get_size());
int max_scale = std::min(
@ -265,8 +270,8 @@ void CVideo::update_framebuffer()
// Update the drawing surface if required.
if (!drawingSurface
|| drawingSurface->w != wsize.x / scale
|| drawingSurface->h != wsize.y / scale)
|| drawingSurface->w != lsize.x
|| drawingSurface->h != lsize.y)
{
uint32_t format = window->pixel_format();
int bpp = SDL_BITSPERPIXEL(format);