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Yet another improvement to the bezier code.

This commit is contained in:
Rein Klazes 1998-10-11 14:07:01 +00:00 committed by Alexandre Julliard
parent d62c62b19b
commit 8077f1094b
1 changed files with 25 additions and 5 deletions
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30
graphics/x11drv/graphics.c
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@ -976,10 +976,20 @@ static BOOL32 BezierCheck( int level, POINT32 *Points)
INT32 dx, dy;
dx=Points[3].x-Points[0].x;
dy=Points[3].y-Points[0].y;
if(ABS(dy)<ABS(dx)){/* shallow line */
if(ABS(dy)<=ABS(dx)){/* shallow line */
/* check that control points are between begin and end */
if( (Points[1].x-Points[0].x)*dx < 0 ||
(Points[2].x-Points[0].x)*dx < 0 ) return FALSE;
if(Points[1].x < Points[0].x){
if(Points[1].x < Points[3].x)
return FALSE;
}else
if(Points[1].x > Points[3].x)
return FALSE;
if(Points[2].x < Points[0].x){
if(Points[2].x < Points[3].x)
return FALSE;
}else
if(Points[2].x > Points[3].x)
return FALSE;
dx=BEZIERSHIFTDOWN(dx);
if(!dx) return TRUE;
if(abs(Points[1].y-Points[0].y-(dy/dx)*
@ -991,8 +1001,18 @@ static BOOL32 BezierCheck( int level, POINT32 *Points)
return TRUE;
}else{ /* steep line */
/* check that control points are between begin and end */
if( (Points[1].y-Points[0].y)*dy < 0 ||
(Points[2].y-Points[0].y)*dy < 0 ) return FALSE;
if(Points[1].y < Points[0].y){
if(Points[1].y < Points[3].y)
return FALSE;
}else
if(Points[1].y > Points[3].y)
return FALSE;
if(Points[2].y < Points[0].y){
if(Points[2].y < Points[3].y)
return FALSE;
}else
if(Points[2].y > Points[3].y)
return FALSE;
dy=BEZIERSHIFTDOWN(dy);
if(!dy) return TRUE;
if(abs(Points[1].x-Points[0].x-(dx/dy)*