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[raster] Simplify dropout detection.

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* src/raster/ftrater.c (Draw_Sweep): Use a single dropout condition.
This commit is contained in:
Alexei Podtelezhnikov 2023-10-31 15:01:32 +00:00
parent 4e2d1f040c
commit dc519d06ea
1 changed files with 17 additions and 29 deletions
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46
src/raster/ftraster.c
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@ -2609,8 +2609,6 @@
PProfile P, Q, P_Left, P_Right;
Long x1, x2, xs, e1, e2;
TProfileList waiting = ras.fProfile;
TProfileList draw_left = NULL;
TProfileList draw_right = NULL;
@ -2683,8 +2681,10 @@
while ( P_Left && P_Right )
{
x1 = P_Left ->X;
x2 = P_Right->X;
Long x1 = P_Left ->X;
Long x2 = P_Right->X;
Long xs;
if ( x1 > x2 )
{
@ -2693,36 +2693,24 @@
x2 = xs;
}
e1 = FLOOR( x1 );
e2 = CEILING( x2 );
if ( x2 - x1 <= ras.precision &&
e1 != x1 && e2 != x2 )
/* if bottom ceiling exceeds top floor, it is a drop-out */
if ( CEILING( x1 ) > FLOOR( x2 ) )
{
if ( e1 > e2 || e2 == e1 + ras.precision )
Int dropOutControl = P_Left->flags & 7;
if ( dropOutControl != 2 )
{
Int dropOutControl = P_Left->flags & 7;
P_Left ->X = x1;
P_Right->X = x2;
if ( dropOutControl != 2 )
{
/* a drop-out was detected */
P_Left ->X = x1;
P_Right->X = x2;
/* mark profile for drop-out processing */
P_Left->countL = 1;
dropouts++;
}
goto Skip_To_Next;
/* mark profile for drop-out processing */
P_Left->countL = 1;
dropouts++;
}
}
ras.Proc_Sweep_Span( RAS_VARS y, x1, x2, P_Left, P_Right );
Skip_To_Next:
else
ras.Proc_Sweep_Span( RAS_VARS y, x1, x2, P_Left, P_Right );
P_Left = P_Left->link;
P_Right = P_Right->link;