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Return correct `linearHoriAdvance' value for embedded TT bitmaps too. 

Reported by Jeremy Manson <jeremy.manson@gmail.com>.

src/truetype/ttgload.c (load_truetype_glyph): Add parameter to
quickly load the glyph header only.
Update all callers.
(tt_loader_init): Add parameter to quickly load the `glyf' table
only.
Update all callers.
(TT_Load_Glyph): Compute linear advance values for embedded bitmap
glyphs too.
This commit is contained in:
Werner Lemberg 2009-11-03 15:46:35 +01:00
parent 422210be64
commit f186ba682d
2 changed files with 48 additions and 9 deletions
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14
ChangeLog
View File

@ -1,3 +1,17 @@
2009-11-03 Werner Lemberg <wl@gnu.org>
Return correct `linearHoriAdvance' value for embedded TT bitmaps too.
Reported by Jeremy Manson <jeremy.manson@gmail.com>.
src/truetype/ttgload.c (load_truetype_glyph): Add parameter to
quickly load the glyph header only.
Update all callers.
(tt_loader_init): Add parameter to quickly load the `glyf' table
only.
Update all callers.
(TT_Load_Glyph): Compute linear advance values for embedded bitmap
glyphs too.
2009-11-03 Werner Lemberg <wl@gnu.org>
Improve code readability.

43
src/truetype/ttgload.c
View File

@ -1183,7 +1183,8 @@
static FT_Error
load_truetype_glyph( TT_Loader loader,
FT_UInt glyph_index,
FT_UInt recurse_count )
FT_UInt recurse_count,
FT_Bool header_only )
{
FT_Error error;
FT_Fixed x_scale, y_scale;
@ -1285,9 +1286,9 @@
opened_frame = 1;
/* read first glyph header */
/* read glyph header first */
error = face->read_glyph_header( loader );
if ( error )
if ( error || header_only )
goto Exit;
}
@ -1298,6 +1299,9 @@
loader->bbox.yMin = 0;
loader->bbox.yMax = 0;
if ( header_only )
goto Exit;
TT_LOADER_SET_PP( loader );
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
@ -1487,7 +1491,7 @@
num_base_points = gloader->base.outline.n_points;
error = load_truetype_glyph( loader, subglyph->index,
recurse_count + 1 );
recurse_count + 1, FALSE );
if ( error )
goto Exit;
@ -1710,7 +1714,7 @@
/* scale the metrics */
if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
{
top = FT_MulFix( top, y_scale );
top = FT_MulFix( top, y_scale );
advance = FT_MulFix( advance, y_scale );
}
@ -1770,6 +1774,7 @@
glyph->metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6;
glyph->format = FT_GLYPH_FORMAT_BITMAP;
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
glyph->bitmap_left = metrics.vertBearingX;
@ -1792,7 +1797,8 @@
tt_loader_init( TT_Loader loader,
TT_Size size,
TT_GlyphSlot glyph,
FT_Int32 load_flags )
FT_Int32 load_flags,
FT_Bool glyf_table_only )
{
TT_Face face;
FT_Stream stream;
@ -1806,7 +1812,7 @@
#ifdef TT_USE_BYTECODE_INTERPRETER
/* load execution context */
if ( IS_HINTED( load_flags ) )
if ( IS_HINTED( load_flags ) && !glyf_table_only )
{
TT_ExecContext exec;
FT_Bool grayscale;
@ -1887,6 +1893,7 @@
}
/* get face's glyph loader */
if ( !glyf_table_only )
{
FT_GlyphLoader gloader = glyph->internal->loader;
@ -1958,7 +1965,25 @@
{
error = load_sbit_image( size, glyph, glyph_index, load_flags );
if ( !error )
{
FT_Face root = &face->root;
if ( FT_IS_SCALABLE( root ) )
{
/* for the bbox we need the header only */
(void)tt_loader_init( &loader, size, glyph, load_flags, TRUE );
(void)load_truetype_glyph( &loader, glyph_index, 0, TRUE );
glyph->linearHoriAdvance = loader.linear;
glyph->linearVertAdvance = loader.top_bearing + loader.bbox.yMax -
loader.vadvance;
if ( face->postscript.isFixedPitch &&
( load_flags & FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ) == 0 )
glyph->linearHoriAdvance = face->horizontal.advance_Width_Max;
}
return TT_Err_Ok;
}
}
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
@ -1970,7 +1995,7 @@
if ( load_flags & FT_LOAD_SBITS_ONLY )
return TT_Err_Invalid_Argument;
error = tt_loader_init( &loader, size, glyph, load_flags );
error = tt_loader_init( &loader, size, glyph, load_flags, FALSE );
if ( error )
return error;
@ -1979,7 +2004,7 @@
glyph->outline.flags = 0;
/* main loading loop */
error = load_truetype_glyph( &loader, glyph_index, 0 );
error = load_truetype_glyph( &loader, glyph_index, 0, FALSE );
if ( !error )
{
if ( glyph->format == FT_GLYPH_FORMAT_COMPOSITE )