Commit d1ade6d11a1e31253180a19a2e0c6c1af0a8563f
2015-06-02T11:44:52
[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.
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diff --git a/ChangeLog b/ChangeLog
index 8d7feee..c6c03f3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
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.
* src/truetype/ttinterp.c: Change all existing TRACE7 calls to
diff --git a/src/raster/ftraster.c b/src/raster/ftraster.c
index 3291ba0..eeab143 100644
--- a/src/raster/ftraster.c
+++ b/src/raster/ftraster.c
@@ -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;