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[raster] Revise overshoot setting. 

* src/raster/ftraster.c (New_Profile, End_Profile): Deal with overshoots
locally.
(Line_To, Conic_To, Cubic_To): Update callers.
This commit is contained in:
Alexei Podtelezhnikov 2023-11-14 15:54:52 +00:00
parent 667aad581a
commit d1b3ef7704
1 changed files with 24 additions and 43 deletions
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67
src/raster/ftraster.c
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@ -634,8 +634,7 @@
* profile.
*/
static Bool
New_Profile( RAS_ARGS TStates aState,
Bool overshoot )
New_Profile( RAS_ARGS TStates aState )
{
Long e;
@ -661,14 +660,14 @@
{
case Ascending_State:
ras.cProfile->flags |= Flow_Up;
if ( overshoot )
if ( IS_BOTTOM_OVERSHOOT( ras.lastY ) )
ras.cProfile->flags |= Overshoot_Bottom;
e = CEILING( ras.lastY );
break;
case Descending_State:
if ( overshoot )
if ( IS_TOP_OVERSHOOT( ras.lastY ) )
ras.cProfile->flags |= Overshoot_Top;
e = FLOOR( ras.lastY );
@ -716,7 +715,7 @@
* SUCCESS on success. FAILURE in case of overflow or incoherency.
*/
static Bool
End_Profile( RAS_ARGS Bool overshoot )
End_Profile( RAS_ARG )
{
PProfile p = ras.cProfile;
Int h = (Int)( ras.top - p->x );
@ -735,11 +734,14 @@
FT_TRACE7(( " ending profile %p, start = %2d, height = %+3d\n",
(void *)p, p->start, p->flags & Flow_Up ? h : -h ));
if ( overshoot )
if ( p->flags & Flow_Up )
{
if ( p->flags & Flow_Up )
if ( IS_TOP_OVERSHOOT( ras.lastY ) )
p->flags |= Overshoot_Top;
else
}
else
{
if ( IS_BOTTOM_OVERSHOOT( ras.lastY ) )
p->flags |= Overshoot_Bottom;
}
@ -1243,25 +1245,21 @@
case Unknown_State:
if ( y > ras.lastY )
{
if ( New_Profile( RAS_VARS Ascending_State,
IS_BOTTOM_OVERSHOOT( ras.lastY ) ) )
if ( New_Profile( RAS_VARS Ascending_State ) )
return FAILURE;
}
else
else if ( y < ras.lastY )
{
if ( y < ras.lastY )
if ( New_Profile( RAS_VARS Descending_State,
IS_TOP_OVERSHOOT( ras.lastY ) ) )
return FAILURE;
if ( New_Profile( RAS_VARS Descending_State ) )
return FAILURE;
}
break;
case Ascending_State:
if ( y < ras.lastY )
{
if ( End_Profile( RAS_VARS IS_TOP_OVERSHOOT( ras.lastY ) ) ||
New_Profile( RAS_VARS Descending_State,
IS_TOP_OVERSHOOT( ras.lastY ) ) )
if ( End_Profile( RAS_VAR ) ||
New_Profile( RAS_VARS Descending_State ) )
return FAILURE;
}
break;
@ -1269,9 +1267,8 @@
case Descending_State:
if ( y > ras.lastY )
{
if ( End_Profile( RAS_VARS IS_BOTTOM_OVERSHOOT( ras.lastY ) ) ||
New_Profile( RAS_VARS Ascending_State,
IS_BOTTOM_OVERSHOOT( ras.lastY ) ) )
if ( End_Profile( RAS_VAR ) ||
New_Profile( RAS_VARS Ascending_State ) )
return FAILURE;
}
break;
@ -1395,18 +1392,13 @@
state_bez = y1 < y3 ? Ascending_State : Descending_State;
if ( ras.state != state_bez )
{
Bool o = ( state_bez == Ascending_State )
? IS_BOTTOM_OVERSHOOT( y1 )
: IS_TOP_OVERSHOOT( y1 );
/* finalize current profile if any */
if ( ras.state != Unknown_State &&
End_Profile( RAS_VARS o ) )
End_Profile( RAS_VAR ) )
goto Fail;
/* create a new profile */
if ( New_Profile( RAS_VARS state_bez, o ) )
if ( New_Profile( RAS_VARS state_bez ) )
goto Fail;
}
@ -1541,22 +1533,17 @@
}
else
{
state_bez = ( y1 <= y4 ) ? Ascending_State : Descending_State;
state_bez = y1 < y4 ? Ascending_State : Descending_State;
/* detect a change of direction */
if ( ras.state != state_bez )
{
Bool o = ( state_bez == Ascending_State )
? IS_BOTTOM_OVERSHOOT( y1 )
: IS_TOP_OVERSHOOT( y1 );
/* finalize current profile if any */
if ( ras.state != Unknown_State &&
End_Profile( RAS_VARS o ) )
End_Profile( RAS_VAR ) )
goto Fail;
if ( New_Profile( RAS_VARS state_bez, o ) )
if ( New_Profile( RAS_VARS state_bez ) )
goto Fail;
}
@ -1865,9 +1852,6 @@
last = -1;
for ( i = 0; i < ras.outline.n_contours; i++ )
{
Bool o;
ras.state = Unknown_State;
ras.gProfile = NULL;
@ -1890,10 +1874,7 @@
( ras.cProfile->flags & Flow_Up ) )
ras.top--;
o = ras.cProfile->flags & Flow_Up ? IS_TOP_OVERSHOOT( ras.lastY )
: IS_BOTTOM_OVERSHOOT( ras.lastY );
if ( End_Profile( RAS_VARS o ) )
if ( End_Profile( RAS_VAR ) )
return FAILURE;
if ( !ras.fProfile )