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[smooth] Reduce outline translations during rendering. 

* src/smooth/ftsmooth.c (ft_smooth_render_generic): Translate origin
virtually by modifying cbox, actually translate outline if cumulative
shift is not zero.
This commit is contained in:
Alexei Podtelezhnikov 2014-10-31 00:07:14 -04:00
parent c7fd93565c
commit e1efe0a2fc
2 changed files with 28 additions and 19 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2014-10-31 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Reduce outline translations during rendering.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Translate origin
virtually by modifying cbox, actually translate outline if cumulative
shift is not zero.
2014-10-30 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Fix Savannah bug #35604 (cont'd).

39
src/smooth/ftsmooth.c
View File

@ -119,9 +119,8 @@
FT_Raster_Params params;
FT_Bool have_translated_origin = FALSE;
FT_Bool have_outline_shifted = FALSE;
FT_Bool have_buffer = FALSE;
FT_Bool have_outline_shifted = FALSE;
FT_Bool have_buffer = FALSE;
/* check glyph image format */
@ -140,20 +139,20 @@
outline = &slot->outline;
/* translate the outline to the new origin if needed */
/* account for the oigin shift */
if ( origin )
{
FT_Outline_Translate( outline, origin->x, origin->y );
have_translated_origin = TRUE;
x_shift = origin->x;
y_shift = origin->y;
}
/* compute the control box, and grid fit it */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
cbox.xMax = FT_PIX_CEIL( cbox.xMax );
cbox.yMax = FT_PIX_CEIL( cbox.yMax );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin + x_shift );
cbox.yMin = FT_PIX_FLOOR( cbox.yMin + y_shift );
cbox.xMax = FT_PIX_CEIL( cbox.xMax + x_shift );
cbox.yMax = FT_PIX_CEIL( cbox.yMax + y_shift );
width = (FT_ULong)( cbox.xMax - cbox.xMin ) >> 6;
height = (FT_ULong)( cbox.yMax - cbox.yMin ) >> 6;
@ -173,8 +172,9 @@
if ( vmul )
height *= 3;
x_shift = cbox.xMin;
y_shift = cbox.yMin;
x_shift -= cbox.xMin;
y_shift -= cbox.yMin;
x_left = cbox.xMin >> 6;
y_top = cbox.yMax >> 6;
@ -187,7 +187,7 @@
if ( hmul )
{
x_shift -= 64 * ( extra >> 1 );
x_shift += 64 * ( extra >> 1 );
width += 3 * extra;
pitch = FT_PAD_CEIL( width, 4 );
x_left -= extra >> 1;
@ -195,7 +195,7 @@
if ( vmul )
{
y_shift -= 64 * ( extra >> 1 );
y_shift += 64 * ( extra >> 1 );
height += 3 * extra;
y_top += extra >> 1;
}
@ -235,8 +235,11 @@
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
/* translate outline to render it into the bitmap */
FT_Outline_Translate( outline, -x_shift, -y_shift );
have_outline_shifted = TRUE;
if ( x_shift || y_shift )
{
FT_Outline_Translate( outline, x_shift, y_shift );
have_outline_shifted = TRUE;
}
/* set up parameters */
params.target = bitmap;
@ -364,9 +367,7 @@
Exit:
if ( have_outline_shifted )
FT_Outline_Translate( outline, x_shift, y_shift );
if ( have_translated_origin )
FT_Outline_Translate( outline, -origin->x, -origin->y );
FT_Outline_Translate( outline, -x_shift, -y_shift );
if ( have_buffer )
{
FT_FREE( bitmap->buffer );