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RageSurfaceUtils::FlipVertically

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This commit is contained in:
Glenn Maynard
2004-08-26 20:36:44 +00:00
parent d2ad8869f0
commit 1771747c0c
3 changed files with 20 additions and 11 deletions
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stepmania/src/RageSurfaceUtils.cpp
+17
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@@ -950,6 +950,23 @@ void RageSurfaceUtils::ApplyHotPinkColorKey( RageSurface *&img )
}
}
void RageSurfaceUtils::FlipVertically( RageSurface *img )
{
const int pitch = img->pitch;
const int bytes_per_row = img->format->BytesPerPixel * img->w;
char *row = new char[bytes_per_row];
for( int y=0; y < img->h/2; y++ )
{
int y2 = img->h-1-y;
memcpy( row, img->pixels + pitch * y, bytes_per_row );
memcpy( img->pixels + pitch * y, img->pixels + pitch * y2, bytes_per_row );
memcpy( img->pixels + pitch * y2, row, bytes_per_row );
}
delete [] row;
}
/*
* (c) 2001-2004 Glenn Maynard, Chris Danford
* All rights reserved.