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[raster] Add more tracing. 

* src/raster/ftraster.c (FT_TRACE7) [_STANDALONE_]: Define.
(Vertical_Sweep_Span, Vertical_Sweep_Drop, Horizontal_Sweep_Span,
Horizontal_Sweep_Drop, Render_Glyph): Add tracing calls.
This commit is contained in:
Werner Lemberg 2015-06-02 11:44:52 +02:00
parent 54d042861b
commit d1ade6d11a
2 changed files with 82 additions and 26 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2015-06-01 Werner Lemberg <wl@gnu.org>
[raster] Add more tracing.
* src/raster/ftraster.c (FT_TRACE7) [_STANDALONE_]: Define.
(Vertical_Sweep_Span, Vertical_Sweep_Drop, Horizontal_Sweep_Span,
Horizontal_Sweep_Drop, Render_Glyph): Add tracing calls.
2015-06-01 Werner Lemberg <wl@gnu.org>
[truetype] While tracing opcodes, show code position and stack.

100
src/raster/ftraster.c
View File

@ -197,6 +197,7 @@
#define FT_TRACE( x ) do { } while ( 0 ) /* nothing */
#define FT_TRACE1( x ) do { } while ( 0 ) /* nothing */
#define FT_TRACE6( x ) do { } while ( 0 ) /* nothing */
#define FT_TRACE7( x ) do { } while ( 0 ) /* nothing */
#endif
#ifndef FT_THROW
@ -582,11 +583,11 @@
* approximating it as a straight segment. The default value of 32 (for
* low accuracy) corresponds to
*
* 32 / 64 == 0.5 pixels ,
* 32 / 64 == 0.5 pixels,
*
* while for the high accuracy case we have
*
* 256/ (1 << 12) = 0.0625 pixels .
* 256 / (1 << 12) = 0.0625 pixels.
*
* `precision_jitter' is an epsilon threshold used in
* `Vertical_Sweep_Span' to deal with small imperfections in the Bezier
@ -669,13 +670,13 @@
if ( overshoot )
ras.cProfile->flags |= Overshoot_Bottom;
FT_TRACE6(( "New ascending profile = %p\n", ras.cProfile ));
FT_TRACE6(( " new ascending profile = %p\n", ras.cProfile ));
break;
case Descending_State:
if ( overshoot )
ras.cProfile->flags |= Overshoot_Top;
FT_TRACE6(( "New descending profile = %p\n", ras.cProfile ));
FT_TRACE6(( " new descending profile = %p\n", ras.cProfile ));
break;
default:
@ -730,7 +731,7 @@
PProfile oldProfile;
FT_TRACE6(( "Ending profile %p, start = %ld, height = %ld\n",
FT_TRACE6(( " ending profile %p, start = %ld, height = %ld\n",
ras.cProfile, ras.cProfile->start, h ));
ras.cProfile->height = h;
@ -2194,6 +2195,14 @@
FT_UNUSED( right );
/* in high-precision mode, we need 12 digits after the comma to */
/* represent multiples of 1/(1<<12) = 1/4096 */
FT_TRACE7(( " y=%d x=[%.12f;%.12f], drop-out=%d",
y,
x1 / (double)ras.precision,
x2 / (double)ras.precision,
dropOutControl ));
/* Drop-out control */
e1 = TRUNC( CEILING( x1 ) );
@ -2215,6 +2224,8 @@
if ( e2 >= ras.bWidth )
e2 = ras.bWidth - 1;
FT_TRACE7(( " -> x=[%d;%d]", e1, e2 ));
c1 = (Short)( e1 >> 3 );
c2 = (Short)( e2 >> 3 );
@ -2242,6 +2253,8 @@
else
*target |= ( f1 & f2 );
}
FT_TRACE7(( "\n" ));
}
@ -2256,6 +2269,11 @@
Short c1, f1;
FT_TRACE7(( " y=%d x=[%.12f;%.12f]",
y,
x1 / (double)ras.precision,
x2 / (double)ras.precision ));
/* Drop-out control */
/* e2 x2 x1 e1 */
@ -2288,6 +2306,8 @@
Int dropOutControl = left->flags & 7;
FT_TRACE7(( ", drop-out=%d", dropOutControl ));
if ( e1 == e2 + ras.precision )
{
switch ( dropOutControl )
@ -2334,14 +2354,14 @@
left->height <= 0 &&
!( left->flags & Overshoot_Top &&
x2 - x1 >= ras.precision_half ) )
return;
goto Exit;
/* lower stub test */
if ( right->next == left &&
left->start == y &&
!( left->flags & Overshoot_Bottom &&
x2 - x1 >= ras.precision_half ) )
return;
goto Exit;
if ( dropOutControl == 1 )
pxl = e2;
@ -2350,7 +2370,7 @@
break;
default: /* modes 2, 3, 6, 7 */
return; /* no drop-out control */
goto Exit; /* no drop-out control */
}
/* undocumented but confirmed: If the drop-out would result in a */
@ -2371,21 +2391,26 @@
if ( e1 >= 0 && e1 < ras.bWidth &&
ras.bTarget[ras.traceOfs + c1] & ( 0x80 >> f1 ) )
return;
goto Exit;
}
else
return;
goto Exit;
}
e1 = TRUNC( pxl );
if ( e1 >= 0 && e1 < ras.bWidth )
{
FT_TRACE7(( " -> x=%d (drop-out)", e1 ));
c1 = (Short)( e1 >> 3 );
f1 = (Short)( e1 & 7 );
ras.bTarget[ras.traceOfs + c1] |= (char)( 0x80 >> f1 );
}
Exit:
FT_TRACE7(( "\n" ));
}
@ -2432,32 +2457,39 @@
Long e1, e2;
FT_TRACE7(( " x=%d y=[%.12f;%.12f]",
y,
x1 / (double)ras.precision,
x2 / (double)ras.precision ));
e1 = CEILING( x1 );
e2 = FLOOR ( x2 );
if ( e1 == e2 )
{
Byte f1;
PByte bits;
bits = ras.bTarget + ( y >> 3 );
f1 = (Byte)( 0x80 >> ( y & 7 ) );
e1 = TRUNC( e1 );
if ( e1 >= 0 && (ULong)e1 < ras.target.rows )
{
Byte f1;
PByte bits;
PByte p;
p = bits - e1 * ras.target.pitch;
FT_TRACE7(( " -> y=%d (drop-out)", e1 ));
bits = ras.bTarget + ( y >> 3 );
f1 = (Byte)( 0x80 >> ( y & 7 ) );
p = bits - e1 * ras.target.pitch;
if ( ras.target.pitch > 0 )
p += (Long)( ras.target.rows - 1 ) * ras.target.pitch;
p[0] |= f1;
}
}
FT_TRACE7(( "\n" ));
}
}
@ -2474,6 +2506,11 @@
Byte f1;
FT_TRACE7(( " x=%d y=[%.12f;%.12f]",
y,
x1 / (double)ras.precision,
x2 / (double)ras.precision ));
/* During the horizontal sweep, we only take care of drop-outs */
/* e1 + <-- pixel center */
@ -2495,6 +2532,8 @@
Int dropOutControl = left->flags & 7;
FT_TRACE7(( ", dropout=%d", dropOutControl ));
if ( e1 == e2 + ras.precision )
{
switch ( dropOutControl )
@ -2516,14 +2555,14 @@
left->height <= 0 &&
!( left->flags & Overshoot_Top &&
x2 - x1 >= ras.precision_half ) )
return;
goto Exit;
/* leftmost stub test */
if ( right->next == left &&
left->start == y &&
!( left->flags & Overshoot_Bottom &&
x2 - x1 >= ras.precision_half ) )
return;
goto Exit;
if ( dropOutControl == 1 )
pxl = e2;
@ -2532,7 +2571,7 @@
break;
default: /* modes 2, 3, 6, 7 */
return; /* no drop-out control */
goto Exit; /* no drop-out control */
}
/* undocumented but confirmed: If the drop-out would result in a */
@ -2558,25 +2597,30 @@
if ( e1 >= 0 &&
(ULong)e1 < ras.target.rows &&
*bits & f1 )
return;
goto Exit;
}
else
return;
goto Exit;
}
bits = ras.bTarget + ( y >> 3 );
f1 = (Byte)( 0x80 >> ( y & 7 ) );
e1 = TRUNC( pxl );
if ( e1 >= 0 && (ULong)e1 < ras.target.rows )
{
FT_TRACE7(( " -> y=%d (drop-out)", e1 ));
bits = ras.bTarget + ( y >> 3 );
f1 = (Byte)( 0x80 >> ( y & 7 ) );
bits -= e1 * ras.target.pitch;
if ( ras.target.pitch > 0 )
bits += (Long)( ras.target.rows - 1 ) * ras.target.pitch;
bits[0] |= f1;
}
Exit:
FT_TRACE7(( "\n" ));
}
@ -2947,6 +2991,8 @@
FT_OUTLINE_SINGLE_PASS ) );
/* Vertical Sweep */
FT_TRACE7(( "Vertical pass (ftraster)\n" ));
ras.Proc_Sweep_Init = Vertical_Sweep_Init;
ras.Proc_Sweep_Span = Vertical_Sweep_Span;
ras.Proc_Sweep_Drop = Vertical_Sweep_Drop;
@ -2965,6 +3011,8 @@
/* Horizontal Sweep */
if ( ras.second_pass && ras.dropOutControl != 2 )
{
FT_TRACE7(( "Horizontal pass (ftraster)\n" ));
ras.Proc_Sweep_Init = Horizontal_Sweep_Init;
ras.Proc_Sweep_Span = Horizontal_Sweep_Span;
ras.Proc_Sweep_Drop = Horizontal_Sweep_Drop;