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* src/pshinter/pshalgo.c (ps_hints_apply): Reset scale values after 

correction for pixel boundary.  Without this patch, the effect can
be cumulative under certain circumstances, making glyphs taller and
taller after each call.  This fixes Savannah bug #19976.
This commit is contained in:
Werner Lemberg 2008-05-18 21:49:02 +00:00
parent 16dc51feae
commit 5e8a368673
2 changed files with 47 additions and 29 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2008-05-18 Werner Lemberg <wl@gnu.org>
* src/pshinter/pshalgo.c (ps_hints_apply): Reset scale values after
correction for pixel boundary. Without this patch, the effect can
be cumulative under certain circumstances, making glyphs taller and
taller after each call. This fixes Savannah bug #19976.
2008-05-18 Werner Lemberg <wl@gnu.org>
* src/base/ftdebug.c (FT_Message, FT_Panic): Send output to stderr.

69
src/pshinter/pshalgo.c
View File

@ -4,7 +4,7 @@
/* */
/* PostScript hinting algorithm (body). */
/* */
/* Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 by */
/* Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used */
@ -2223,15 +2223,22 @@
FT_Fixed x_scale = dim_x->scale_mult;
FT_Fixed y_scale = dim_y->scale_mult;
FT_Fixed old_x_scale = x_scale;
FT_Fixed old_y_scale = y_scale;
FT_Fixed scaled;
FT_Fixed fitted;
FT_Bool rescale = FALSE;
scaled = FT_MulFix( globals->blues.normal_top.zones->org_ref, y_scale );
fitted = FT_PIX_ROUND( scaled );
if ( fitted != 0 && scaled != fitted )
{
rescale = TRUE;
y_scale = FT_MulDiv( y_scale, fitted, scaled );
if ( fitted < scaled )
@ -2239,43 +2246,47 @@
psh_globals_set_scale( glyph->globals, x_scale, y_scale, 0, 0 );
}
}
glyph->do_horz_hints = 1;
glyph->do_vert_hints = 1;
glyph->do_horz_hints = 1;
glyph->do_vert_hints = 1;
glyph->do_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD );
glyph->do_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD );
glyph->do_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD_V );
glyph->do_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
hint_mode == FT_RENDER_MODE_LCD_V );
glyph->do_stem_adjust = FT_BOOL( hint_mode != FT_RENDER_MODE_LIGHT );
glyph->do_stem_adjust = FT_BOOL( hint_mode != FT_RENDER_MODE_LIGHT );
for ( dimension = 0; dimension < 2; dimension++ )
{
/* load outline coordinates into glyph */
psh_glyph_load_points( glyph, dimension );
for ( dimension = 0; dimension < 2; dimension++ )
{
/* load outline coordinates into glyph */
psh_glyph_load_points( glyph, dimension );
/* compute local extrema */
psh_glyph_compute_extrema( glyph );
/* compute local extrema */
psh_glyph_compute_extrema( glyph );
/* compute aligned stem/hints positions */
psh_hint_table_align_hints( &glyph->hint_tables[dimension],
glyph->globals,
dimension,
glyph );
/* compute aligned stem/hints positions */
psh_hint_table_align_hints( &glyph->hint_tables[dimension],
glyph->globals,
dimension,
glyph );
/* find strong points, align them, then interpolate others */
psh_glyph_find_strong_points( glyph, dimension );
if ( dimension == 1 )
psh_glyph_find_blue_points( &globals->blues, glyph );
psh_glyph_interpolate_strong_points( glyph, dimension );
psh_glyph_interpolate_normal_points( glyph, dimension );
psh_glyph_interpolate_other_points( glyph, dimension );
/* find strong points, align them, then interpolate others */
psh_glyph_find_strong_points( glyph, dimension );
if ( dimension == 1 )
psh_glyph_find_blue_points( &globals->blues, glyph );
psh_glyph_interpolate_strong_points( glyph, dimension );
psh_glyph_interpolate_normal_points( glyph, dimension );
psh_glyph_interpolate_other_points( glyph, dimension );
/* save hinted coordinates back to outline */
psh_glyph_save_points( glyph, dimension );
/* save hinted coordinates back to outline */
psh_glyph_save_points( glyph, dimension );
if ( rescale )
psh_globals_set_scale( glyph->globals,
old_x_scale, old_y_scale, 0, 0 );
}
}
Exit: