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freetype2
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Code Issues 4 Releases Wiki Activity

[raster] Harmonize target bitmap navigation. 

* src/raster/ftraster.c (black_TWorker): Store signed maximum indexes
in both directions instead of unsigned dimensions of the original bitmap.
(*_Sweep_*, Render_Glyph, ft_black_render): Updated all users.
This commit is contained in:
Alexei Podtelezhnikov 2023-11-06 18:56:38 -05:00
parent e920273774
commit 6338f2a681
1 changed files with 32 additions and 31 deletions
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63
src/raster/ftraster.c
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@ -459,10 +459,6 @@
Byte dropOutControl; /* current drop_out control method */
UShort bWidth; /* target bitmap width */
PByte bOrigin; /* target bitmap bottom-left origin */
PByte bLine; /* target bitmap current line */
Long lastX, lastY;
Long minY, maxY;
@ -480,9 +476,14 @@
TStates state; /* rendering state */
FT_Bitmap target; /* description of target bit/pixmap */
FT_Outline outline;
Int bTop; /* target bitmap max line index */
Int bRight; /* target bitmap rightmost index */
Int bPitch; /* target bitmap pitch */
PByte bOrigin; /* target bitmap bottom-left origin */
PByte bLine; /* target bitmap current line */
/* dispatch variables */
Function_Sweep_Init* Proc_Sweep_Init;
@ -2084,7 +2085,7 @@
FT_UNUSED( max );
ras.bLine = ras.bOrigin - min * ras.target.pitch;
ras.bLine = ras.bOrigin - min * ras.bPitch;
}
@ -2110,7 +2111,7 @@
e1 = (Int)TRUNC( CEILING( x1 ) );
e2 = (Int)TRUNC( FLOOR( x2 ) );
if ( e2 >= 0 && e1 < ras.bWidth )
if ( e2 >= 0 && e1 <= ras.bRight )
{
Byte* target;
@ -2119,8 +2120,8 @@
if ( e1 < 0 )
e1 = 0;
if ( e2 >= ras.bWidth )
e2 = ras.bWidth - 1;
if ( e2 > ras.bRight )
e2 = ras.bRight;
FT_TRACE7(( " -> x=[%d;%d]", e1, e2 ));
@ -2273,7 +2274,7 @@
/* bounding box instead */
if ( pxl < 0 )
pxl = e1;
else if ( TRUNC( pxl ) >= ras.bWidth )
else if ( TRUNC( pxl ) > ras.bRight )
pxl = e2;
/* check that the other pixel isn't set */
@ -2284,7 +2285,7 @@
c1 = (Int)( e1 >> 3 );
f1 = (Int)( e1 & 7 );
if ( e1 >= 0 && e1 < ras.bWidth &&
if ( e1 >= 0 && e1 <= ras.bRight &&
ras.bLine[c1] & ( 0x80 >> f1 ) )
goto Exit;
}
@ -2294,7 +2295,7 @@
e1 = TRUNC( pxl );
if ( e1 >= 0 && e1 < ras.bWidth )
if ( e1 >= 0 && e1 <= ras.bRight )
{
FT_TRACE7(( " -> x=%ld", e1 ));
@ -2312,7 +2313,7 @@
static void
Vertical_Sweep_Step( RAS_ARG )
{
ras.bLine -= ras.target.pitch;
ras.bLine -= ras.bPitch;
}
@ -2366,13 +2367,13 @@
{
e1 = TRUNC( e1 );
if ( e1 >= 0 && (ULong)e1 < ras.target.rows )
if ( e1 >= 0 && e1 <= ras.bTop )
{
Int f1;
PByte bits;
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.target.pitch;
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.bPitch;
f1 = 0x80 >> ( y & 7 );
FT_TRACE7(( bits[0] & f1 ? " redundant"
@ -2388,13 +2389,13 @@
{
e2 = TRUNC( e2 );
if ( e2 >= 0 && (ULong)e2 < ras.target.rows )
if ( e2 >= 0 && e2 <= ras.bTop )
{
Int f1;
PByte bits;
bits = ras.bOrigin + ( y >> 3 ) - e2 * ras.target.pitch;
bits = ras.bOrigin + ( y >> 3 ) - e2 * ras.bPitch;
f1 = 0x80 >> ( y & 7 );
FT_TRACE7(( bits[0] & f1 ? " redundant"
@ -2491,7 +2492,7 @@
/* bounding box instead */
if ( pxl < 0 )
pxl = e1;
else if ( (ULong)( TRUNC( pxl ) ) >= ras.target.rows )
else if ( TRUNC( pxl ) > ras.bTop )
pxl = e2;
/* check that the other pixel isn't set */
@ -2499,12 +2500,11 @@
e1 = TRUNC( e1 );
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.target.pitch;
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.bPitch;
f1 = 0x80 >> ( y & 7 );
if ( e1 >= 0 &&
(ULong)e1 < ras.target.rows &&
*bits & f1 )
if ( e1 >= 0 && e1 <= ras.bTop &&
*bits & f1 )
goto Exit;
}
else
@ -2513,11 +2513,11 @@
e1 = TRUNC( pxl );
if ( e1 >= 0 && (ULong)e1 < ras.target.rows )
if ( e1 >= 0 && e1 <= ras.bTop )
{
FT_TRACE7(( " -> y=%ld", e1 ));
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.target.pitch;
bits = ras.bOrigin + ( y >> 3 ) - e1 * ras.bPitch;
f1 = 0x80 >> ( y & 7 );
bits[0] |= f1;
@ -2910,7 +2910,7 @@
ras.Proc_Sweep_Drop = Vertical_Sweep_Drop;
ras.Proc_Sweep_Step = Vertical_Sweep_Step;
error = Render_Single_Pass( RAS_VARS 0, 0, (Int)ras.target.rows - 1 );
error = Render_Single_Pass( RAS_VARS 0, 0, ras.bTop );
if ( error )
return error;
@ -2922,7 +2922,7 @@
ras.Proc_Sweep_Drop = Horizontal_Sweep_Drop;
ras.Proc_Sweep_Step = Horizontal_Sweep_Step;
error = Render_Single_Pass( RAS_VARS 1, 0, (Int)ras.target.width - 1 );
error = Render_Single_Pass( RAS_VARS 1, 0, ras.bRight );
if ( error )
return error;
}
@ -3067,13 +3067,14 @@
return FT_THROW( Invalid_Argument );
ras.outline = *outline;
ras.target = *target_map;
ras.bWidth = (UShort)ras.target.width;
ras.bOrigin = (Byte*)ras.target.buffer;
ras.bTop = (Int)target_map->rows - 1;
ras.bRight = (Int)target_map->width - 1;
ras.bPitch = (Int)target_map->pitch;
ras.bOrigin = (PByte)target_map->buffer;
if ( ras.target.pitch > 0 )
ras.bOrigin += (Long)( ras.target.rows - 1 ) * ras.target.pitch;
if ( ras.bPitch > 0 )
ras.bOrigin += ras.bTop * ras.bPitch;
return Render_Glyph( RAS_VAR );
}