actions/itgmania212121
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

special case 0.5 since the change was causing artifacts at other zoom factors

Browse Source
This commit is contained in:
Chris Danford
2004-08-09 08:08:37 +00:00
parent 6d811066ee
commit 2951dec4c1
1 changed files with 10 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
stepmania/src/SDL_rotozoom.cpp
+10 -8
View File
@@ -36,10 +36,11 @@ static void ZoomSurface( RageSurface * src, RageSurface * dst )
{
float sax = sx*x + sx/2;
// Pixel alignment is off in the magnify case.
// This is an ugly hack to correct for it.
if( sx < 1 ) // magnifying
sax += SCALE(sx,0.5f,1.f,sx/2.f,0.f);
// HACK to improve pixel alignment in the 2x magnify case.
// I can't figure out a general solution that works with larger and
// scale factors, so this remains a special case.
if( sx == 0.5f ) // 2x magnify
sax += 0.5f;
/* sx/2 is the distance from the start of the sample to the center;
* sx/4 is the distance from the center of the sample to the center of
@@ -72,10 +73,11 @@ static void ZoomSurface( RageSurface * src, RageSurface * dst )
{
float say = sy*y + sy/2;
// Pixel alignment is off in the magnify case.
// This is an ugly hack to correct for it.
if( sy < 1 ) // magnifying
say += SCALE(sy,0.5f,1.f,sy/2.f,0.f);
// HACK to improve pixel alignment in the 2x magnify case.
// I can't figure out a general solution that works with larger and
// scale factors, so this remains a special case.
if( sy == 0.5f ) // 2x magnify
say += 0.5f;
float ystep = sy/4;