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[raster] Handle sub-band stack locally. 

* src/raster/ftraster.c (black_TWorker): Move `band_stack' from here..
(Render_Single_Pass): ... to here and accept limit arguments.
(Render_Glyph): Updated.
This commit is contained in:
Alexei Podtelezhnikov 2021-06-29 23:27:10 -04:00
parent 7be47010e9
commit 3696ac5a18
2 changed files with 38 additions and 30 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2021-06-29 Alexei Podtelezhnikov <apodtele@gmail.com>
[raster] Handle sub-band stack locally.
* src/raster/ftraster.c (black_TWorker): Move `band_stack' from here..
(Render_Single_Pass): ... to here and accept limit arguments.
(Render_Glyph): Updated.
2021-06-25 Anurag Thakur <anuthadev@gmail.com>
[CI] Introduce linux CI and refactor job names.

60
src/raster/ftraster.c
View File

@ -370,8 +370,8 @@
/* by the sub-banding mechanism */
typedef struct black_TBand_
{
Short y_min; /* band's minimum */
Short y_max; /* band's maximum */
Int y_min; /* band's minimum */
Int y_max; /* band's maximum */
} black_TBand;
@ -521,9 +521,6 @@
/* drop-out accurately when calling */
/* Render_Glyph. */
black_TBand band_stack[16]; /* band stack used for sub-banding */
/* enough for signed short bands */
};
@ -3029,16 +3026,21 @@
* Renderer error code.
*/
static int
Render_Single_Pass( RAS_ARGS Bool flipped )
Render_Single_Pass( RAS_ARGS Bool flipped,
Int y_min,
Int y_max )
{
Short i, j, k;
Int band_top = 0;
Int y_mid;
Int band_top = 0;
black_TBand band_stack[16]; /* band stack used for sub-banding */
/* enough for signed short bands */
do
while ( 1 )
{
ras.maxY = (Long)ras.band_stack[band_top].y_max * ras.precision;
ras.minY = (Long)ras.band_stack[band_top].y_min * ras.precision;
ras.minY = (Long)y_min * ras.precision;
ras.maxY = (Long)y_max * ras.precision;
ras.top = ras.buff;
@ -3051,29 +3053,31 @@
/* sub-banding */
i = ras.band_stack[band_top].y_min;
j = ras.band_stack[band_top].y_max;
if ( i == j )
if ( y_min == y_max )
return ras.error; /* still Raster_Overflow */
k = (Short)( ( i + j ) / 2 );
y_mid = ( y_min + y_max ) >> 1;
ras.band_stack[band_top].y_max = k;
ras.band_stack[band_top + 1].y_min = (Short)( k + 1 );
ras.band_stack[band_top + 1].y_max = j;
band_stack[band_top].y_min = y_min;
band_stack[band_top].y_max = y_mid;
band_top++;
y_min = y_mid + 1;
}
else
{
if ( ras.fProfile )
if ( Draw_Sweep( RAS_VAR ) )
return ras.error;
band_top--;
if ( --band_top < 0 )
break;
y_min = band_stack[band_top].y_min;
y_max = band_stack[band_top].y_max;
}
} while ( band_top >= 0 );
}
return Raster_Err_Ok;
}
@ -3123,16 +3127,14 @@
ras.Proc_Sweep_Drop = Vertical_Sweep_Drop;
ras.Proc_Sweep_Step = Vertical_Sweep_Step;
ras.band_stack[0].y_min = 0;
ras.band_stack[0].y_max = (Short)( ras.target.rows - 1 );
ras.bWidth = (UShort)ras.target.width;
ras.bOrigin = (Byte*)ras.target.buffer;
if ( ras.target.pitch > 0 )
ras.bOrigin += (Long)( ras.target.rows - 1 ) * ras.target.pitch;
if ( ( error = Render_Single_Pass( RAS_VARS 0 ) ) != 0 )
error = Render_Single_Pass( RAS_VARS 0, 0, (Int)ras.target.rows - 1 );
if ( error )
return error;
/* Horizontal Sweep */
@ -3145,10 +3147,8 @@
ras.Proc_Sweep_Drop = Horizontal_Sweep_Drop;
ras.Proc_Sweep_Step = Horizontal_Sweep_Step;
ras.band_stack[0].y_min = 0;
ras.band_stack[0].y_max = (Short)( ras.target.width - 1 );
if ( ( error = Render_Single_Pass( RAS_VARS 1 ) ) != 0 )
error = Render_Single_Pass( RAS_VARS 1, 0, (Int)ras.target.width - 1 );
if ( error )
return error;
}