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-rw-r--r--src/truetype/ttgload.c109
1 files changed, 82 insertions, 27 deletions
diff --git a/src/truetype/ttgload.c b/src/truetype/ttgload.c
index 57ea0ba..1b496c0 100644
--- a/src/truetype/ttgload.c
+++ b/src/truetype/ttgload.c
@@ -161,8 +161,31 @@
&top_bearing,
&advance_height );
+ loader->left_bearing = left_bearing;
+ loader->advance = advance_width;
+ loader->top_bearing = top_bearing;
+ loader->vadvance = advance_height;
+
+ if ( !loader->linear_def )
+ {
+ loader->linear_def = 1;
+ loader->linear = advance_width;
+ }
+ }
+
+
#ifdef FT_CONFIG_OPTION_INCREMENTAL
+ static void
+ tt_get_metrics_incr_overrides( TT_Loader loader,
+ FT_UInt glyph_index )
+ {
+ TT_Face face = (TT_Face)loader->face;
+
+ FT_Short left_bearing = 0, top_bearing = 0;
+ FT_UShort advance_width = 0, advance_height = 0;
+
+
/* If this is an incrementally loaded font check whether there are */
/* overriding metrics for this glyph. */
if ( face->root.internal->incremental_interface &&
@@ -172,9 +195,9 @@
FT_Error error;
- metrics.bearing_x = left_bearing;
+ metrics.bearing_x = loader->left_bearing;
metrics.bearing_y = 0;
- metrics.advance = advance_width;
+ metrics.advance = loader->advance;
metrics.advance_v = 0;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
@@ -190,8 +213,8 @@
/* GWW: Do I do the same for vertical metrics? */
metrics.bearing_x = 0;
- metrics.bearing_y = top_bearing;
- metrics.advance = advance_height;
+ metrics.bearing_y = loader->top_bearing;
+ metrics.advance = loader->vadvance;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
@@ -204,24 +227,24 @@
#endif /* 0 */
+ loader->left_bearing = left_bearing;
+ loader->advance = advance_width;
+ loader->top_bearing = top_bearing;
+ loader->vadvance = advance_height;
+
+ if ( !loader->linear_def )
+ {
+ loader->linear_def = 1;
+ loader->linear = advance_width;
+ }
}
Exit:
+ return;
+ }
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
- loader->left_bearing = left_bearing;
- loader->advance = advance_width;
- loader->top_bearing = top_bearing;
- loader->vadvance = advance_height;
-
- if ( !loader->linear_def )
- {
- loader->linear_def = 1;
- loader->linear = advance_width;
- }
- }
-
/*************************************************************************/
/* */
@@ -271,7 +294,7 @@
FT_UNUSED( glyph_index );
- FT_TRACE5(( "Glyph %ld\n", glyph_index ));
+ FT_TRACE4(( "Glyph %ld\n", glyph_index ));
/* the following line sets the `error' variable through macros! */
if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
@@ -367,7 +390,7 @@
if ( cont[0] <= prev_cont )
{
/* unordered contours: this is invalid */
- error = FT_Err_Invalid_Table;
+ error = TT_Err_Invalid_Table;
goto Fail;
}
prev_cont = cont[0];
@@ -1118,7 +1141,8 @@
{
FT_Stream stream = loader->stream;
- FT_UShort n_ins;
+ FT_UShort n_ins, max_ins;
+ FT_ULong tmp;
/* TT_Load_Composite_Glyph only gives us the offset of instructions */
@@ -1130,12 +1154,27 @@
FT_TRACE5(( " Instructions size = %d\n", n_ins ));
/* check it */
- if ( n_ins > ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions )
+ max_ins = ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions;
+ if ( n_ins > max_ins )
{
- FT_TRACE0(( "TT_Process_Composite_Glyph: too many instructions (%d)\n",
- n_ins ));
+ /* acroread ignores this field, so we only do a rough safety check */
+ if ( (FT_Int)n_ins > loader->byte_len )
+ {
+ FT_TRACE1(( "TT_Process_Composite_Glyph: "
+ "too many instructions (%d) for glyph with length %d\n",
+ n_ins, loader->byte_len ));
+ return TT_Err_Too_Many_Hints;
+ }
- return TT_Err_Too_Many_Hints;
+ tmp = loader->exec->glyphSize;
+ error = Update_Max( loader->exec->memory,
+ &tmp,
+ sizeof ( FT_Byte ),
+ (void*)&loader->exec->glyphIns,
+ n_ins );
+ loader->exec->glyphSize = (FT_UShort)tmp;
+ if ( error )
+ return error;
}
else if ( n_ins == 0 )
return TT_Err_Ok;
@@ -1316,8 +1355,14 @@
if ( header_only )
goto Exit;
+ /* must initialize points before (possibly) overriding */
+ /* glyph metrics from the incremental interface */
TT_LOADER_SET_PP( loader );
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+ tt_get_metrics_incr_overrides( loader, glyph_index );
+#endif
+
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( ((TT_Face)(loader->face))->doblend )
@@ -1353,8 +1398,14 @@
goto Exit;
}
+ /* must initialize points before (possibly) overriding */
+ /* glyph metrics from the incremental interface */
TT_LOADER_SET_PP( loader );
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+ tt_get_metrics_incr_overrides( loader, glyph_index );
+#endif
+
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
@@ -1481,6 +1532,7 @@
FT_UInt num_base_subgs = gloader->base.num_subglyphs;
FT_Stream old_stream = loader->stream;
+ FT_Int old_byte_len = loader->byte_len;
FT_GlyphLoader_Add( gloader );
@@ -1535,7 +1587,8 @@
num_base_points );
}
- loader->stream = old_stream;
+ loader->stream = old_stream;
+ loader->byte_len = old_byte_len;
/* process the glyph */
loader->ins_pos = ins_pos;
@@ -2031,9 +2084,11 @@
glyph->outline = loader.gloader->base.outline;
glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;
- /* In case bit 1 of the `flags' field in the `head' table isn't */
- /* set, translate array so that (0,0) is the glyph's origin. */
- if ( ( face->header.Flags & 2 ) == 0 && loader.pp1.x )
+ /* Translate array so that (0,0) is the glyph's origin. Note */
+ /* that this behaviour is independent on the value of bit 1 of */
+ /* the `flags' field in the `head' table -- at least major */
+ /* applications like Acroread indicate that. */
+ if ( loader.pp1.x )
FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 15:13:38 +0000