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[raster] Instantly remove profiles from linked lists.

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* src/raster/ftraster.c (DelOld): Remove loopy function.
(Draw_Sweep): Implement instant profile removal.
This commit is contained in:
Alexei Podtelezhnikov 2023-11-03 22:34:37 -04:00
parent 6d6607b8b3
commit 046c4fc7be
1 changed files with 19 additions and 51 deletions
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70
src/raster/ftraster.c
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@ -2017,39 +2017,6 @@
}
/**************************************************************************
*
* DelOld
*
* Removes an old profile from a linked list.
*/
static void
DelOld( PProfileList list,
const PProfile profile )
{
PProfile *old, current;
old = list;
current = *old;
while ( current )
{
if ( current == profile )
{
*old = current->link;
return;
}
old = &current->link;
current = *old;
}
/* we should never get there, unless the profile was not part of */
/* the list. */
}
/**************************************************************************
*
* Sort
@ -2589,7 +2556,7 @@
Int min_Y, max_Y, dropouts;
Int y, y_change, y_height;
PProfile P, Q, P_Left, P_Right;
PProfile *Q, P, P_Left, P_Right;
TProfileList waiting = ras.fProfile;
TProfileList draw_left = NULL;
@ -2625,23 +2592,22 @@
{
/* check waiting list for new profile activations */
P = waiting;
while ( P )
Q = &waiting;
while ( *Q )
{
Q = P->link;
P = *Q;
P->countL -= y_height;
if ( P->countL == 0 )
{
DelOld( &waiting, P );
*Q = P->link; /* remove */
if ( P->flags & Flow_Up )
InsNew( &draw_left, P );
else
InsNew( &draw_right, P );
}
P = Q;
else
Q = &P->link;
}
/* sort the drawing lists */
@ -2719,22 +2685,24 @@
/* remove exhausted profiles */
P = draw_left;
while ( P )
Q = &draw_left;
while ( *Q )
{
Q = P->link;
P = *Q;
if ( P->height == 0 )
DelOld( &draw_left, P );
P = Q;
*Q = P->link;
else
Q = &P->link;
}
P = draw_right;
while ( P )
Q = &draw_right;
while ( *Q )
{
Q = P->link;
P = *Q;
if ( P->height == 0 )
DelOld( &draw_right, P );
P = Q;
*Q = P->link;
else
Q = &P->link;
}
}