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Create new utility function for scaling with aspect ratio and use it for DXVA2

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This commit is contained in:
Cameron Gutman 2018-08-04 22:22:15 -07:00
commit 5cbb38091b
4 changed files with 49 additions and 18 deletions
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20
app/streaming/streamutils.cpp Normal file
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#include "streamutils.h"
void StreamUtils::scaleSourceToDestinationSurface(SDL_Rect* src, SDL_Rect* dst)
{
int dstH = dst->w * src->h / src->w;
int dstW = dst->h * src->w / src->h;
if (dstH > dst->h) {
dst->y = 0;
dst->x = (dst->w - dstW) / 2;
dst->w = dstW;
SDL_assert(dst->w * src->h / src->w <= dst->h);
}
else {
dst->x = 0;
dst->y = (dst->h - dstH) / 2;
dst->h = dstH;
SDL_assert(dst->h * src->w / src->h <= dst->w);
}
}