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path: root/src/freetype2/truetype/ttgload.c
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Diffstat (limited to 'src/freetype2/truetype/ttgload.c')
-rw-r--r--src/freetype2/truetype/ttgload.c306
1 files changed, 193 insertions, 113 deletions
diff --git a/src/freetype2/truetype/ttgload.c b/src/freetype2/truetype/ttgload.c
index ae476a4..28ddb99 100644
--- a/src/freetype2/truetype/ttgload.c
+++ b/src/freetype2/truetype/ttgload.c
@@ -4,7 +4,7 @@
/* */
/* TrueType Glyph Loader (body). */
/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 by */
+/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -69,12 +69,12 @@
/* `check' is true, take care of monospaced fonts by returning the */
/* advance width maximum. */
/* */
- static void
- Get_HMetrics( TT_Face face,
- FT_UInt idx,
- FT_Bool check,
- FT_Short* lsb,
- FT_UShort* aw )
+ FT_LOCAL_DEF(void)
+ TT_Get_HMetrics( TT_Face face,
+ FT_UInt idx,
+ FT_Bool check,
+ FT_Short* lsb,
+ FT_UShort* aw )
{
( (SFNT_Service)face->sfnt )->get_metrics( face, 0, idx, lsb, aw );
@@ -96,12 +96,12 @@
/* The monospace `check' is probably not meaningful here, but we leave */
/* it in for a consistent interface. */
/* */
- static void
- Get_VMetrics( TT_Face face,
- FT_UInt idx,
- FT_Bool check,
- FT_Short* tsb,
- FT_UShort* ah )
+ FT_LOCAL_DEF(void)
+ TT_Get_VMetrics( TT_Face face,
+ FT_UInt idx,
+ FT_Bool check,
+ FT_Short* tsb,
+ FT_UShort* ah )
{
FT_UNUSED( check );
@@ -267,7 +267,11 @@
if ( n_contours >= 0xFFF || p + ( n_contours + 1 ) * 2 > limit )
goto Invalid_Outline;
- cont[0] = prev_cont = FT_NEXT_USHORT( p );
+ prev_cont = FT_NEXT_USHORT( p );
+
+ if ( n_contours > 0 )
+ cont[0] = prev_cont;
+
for ( cont++; cont < cont_limit; cont++ )
{
cont[0] = FT_NEXT_USHORT( p );
@@ -313,7 +317,7 @@
if ( n_ins > face->max_profile.maxSizeOfInstructions )
{
- FT_TRACE0(( "TT_Load_Simple_Glyph: Too many instructions (%d)\n",
+ FT_TRACE0(( "TT_Load_Simple_Glyph: too many instructions (%d)\n",
n_ins ));
error = TT_Err_Too_Many_Hints;
goto Fail;
@@ -321,7 +325,7 @@
if ( ( limit - p ) < n_ins )
{
- FT_TRACE0(( "TT_Load_Simple_Glyph: Instruction count mismatch!\n" ));
+ FT_TRACE0(( "TT_Load_Simple_Glyph: instruction count mismatch\n" ));
error = TT_Err_Too_Many_Hints;
goto Fail;
}
@@ -378,8 +382,8 @@
for ( ; vec < vec_limit; vec++, flag++ )
{
- FT_Pos y = 0;
- FT_Byte f = *flag;
+ FT_Pos y = 0;
+ FT_Byte f = *flag;
if ( f & 2 )
@@ -401,7 +405,8 @@
x += y;
vec->x = x;
- *flag = f & ~( 2 | 16 );
+ /* the cast is for stupid compilers */
+ *flag = (FT_Byte)( f & ~( 2 | 16 ) );
}
/* reading the Y coordinates */
@@ -413,8 +418,8 @@
for ( ; vec < vec_limit; vec++, flag++ )
{
- FT_Pos y = 0;
- FT_Byte f = *flag;
+ FT_Pos y = 0;
+ FT_Byte f = *flag;
if ( f & 4 )
@@ -436,7 +441,8 @@
x += y;
vec->y = x;
- *flag = f & FT_CURVE_TAG_ON;
+ /* the cast is for stupid compilers */
+ *flag = (FT_Byte)( f & FT_CURVE_TAG_ON );
}
outline->n_points = (FT_UShort)n_points;
@@ -553,10 +559,10 @@
FT_Stream stream = loader->stream;
- /* we must undo the FT_FRAME_ENTER in order to point to the */
- /* composite instructions, if we find some. */
- /* we will process them later... */
- /* */
+ /* we must undo the FT_FRAME_ENTER in order to point */
+ /* to the composite instructions, if we find some. */
+ /* We will process them later. */
+ /* */
loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +
p - limit );
}
@@ -627,7 +633,13 @@
#ifdef TT_USE_BYTECODE_INTERPRETER
- n_ins = loader->glyph->control_len;
+ if ( loader->glyph->control_len > 0xFFFFL )
+ {
+ FT_TRACE1(( "TT_Hint_Glyph: too long instructions " ));
+ FT_TRACE1(( "(0x%lx byte) is truncated\n",
+ loader->glyph->control_len ));
+ }
+ n_ins = (FT_UInt)( loader->glyph->control_len );
#endif
origin = zone->cur[zone->n_points - 4].x;
@@ -639,6 +651,26 @@
/* save original point position in org */
if ( n_ins > 0 )
FT_ARRAY_COPY( zone->org, zone->cur, zone->n_points );
+
+ /* Reset graphics state. */
+ loader->exec->GS = ((TT_Size)loader->size)->GS;
+
+ /* XXX: UNDOCUMENTED! Hinting instructions of a composite glyph */
+ /* completely refer to the (already) hinted subglyphs. */
+ if ( is_composite )
+ {
+ loader->exec->metrics.x_scale = 1 << 16;
+ loader->exec->metrics.y_scale = 1 << 16;
+
+ FT_ARRAY_COPY( zone->orus, zone->cur, zone->n_points );
+ }
+ else
+ {
+ loader->exec->metrics.x_scale =
+ ((TT_Size)loader->size)->metrics.x_scale;
+ loader->exec->metrics.y_scale =
+ ((TT_Size)loader->size)->metrics.y_scale;
+ }
#endif
/* round pp2 and pp4 */
@@ -654,6 +686,9 @@
FT_Bool debug;
FT_Error error;
+ FT_GlyphLoader gloader = loader->gloader;
+ FT_Outline current_outline = gloader->current.outline;
+
error = TT_Set_CodeRange( loader->exec, tt_coderange_glyph,
loader->exec->glyphIns, n_ins );
@@ -669,6 +704,10 @@
error = TT_Run_Context( loader->exec, debug );
if ( error && loader->exec->pedantic_hinting )
return error;
+
+ /* store drop-out mode in bits 5-7; set bit 2 also as a marker */
+ current_outline.tags[0] |=
+ ( loader->exec->GS.scan_type << 5 ) | FT_CURVE_TAG_HAS_SCANMODE;
}
#endif
@@ -702,7 +741,7 @@
FT_GlyphLoader gloader = loader->gloader;
FT_Error error = TT_Err_Ok;
FT_Outline* outline;
- FT_UInt n_points;
+ FT_Int n_points;
outline = &gloader->current.outline;
@@ -729,7 +768,7 @@
/* Deltas apply to the unscaled data. */
FT_Vector* deltas;
FT_Memory memory = loader->face->memory;
- FT_UInt i;
+ FT_Int i;
error = TT_Vary_Get_Glyph_Deltas( (TT_Face)(loader->face),
@@ -903,15 +942,15 @@
/* This algorithm is a guess and works much better than the above. */
/* */
FT_Fixed mac_xscale = FT_SqrtFixed(
- FT_MulFix( subglyph->transform.xx,
- subglyph->transform.xx ) +
- FT_MulFix( subglyph->transform.xy,
- subglyph->transform.xy ) );
+ (FT_Int32)FT_MulFix( subglyph->transform.xx,
+ subglyph->transform.xx ) +
+ (FT_Int32)FT_MulFix( subglyph->transform.xy,
+ subglyph->transform.xy ) );
FT_Fixed mac_yscale = FT_SqrtFixed(
- FT_MulFix( subglyph->transform.yy,
- subglyph->transform.yy ) +
- FT_MulFix( subglyph->transform.yx,
- subglyph->transform.yx ) );
+ (FT_Int32)FT_MulFix( subglyph->transform.yy,
+ subglyph->transform.yy ) +
+ (FT_Int32)FT_MulFix( subglyph->transform.yx,
+ subglyph->transform.yx ) );
x = FT_MulFix( x, mac_xscale );
@@ -1004,7 +1043,7 @@
/* check it */
if ( n_ins > ((TT_Face)loader->face)->max_profile.maxSizeOfInstructions )
{
- FT_TRACE0(( "TT_Process_Composite_Glyph: Too many instructions (%d)\n",
+ FT_TRACE0(( "TT_Process_Composite_Glyph: too many instructions (%d)\n",
n_ins ));
return TT_Err_Too_Many_Hints;
@@ -1027,8 +1066,7 @@
/* Some points are likely touched during execution of */
/* instructions on components. So let's untouch them. */
for ( i = start_point; i < loader->zone.n_points; i++ )
- loader->zone.tags[i] &= ~( FT_CURVE_TAG_TOUCH_X |
- FT_CURVE_TAG_TOUCH_Y );
+ loader->zone.tags[i] &= ~FT_CURVE_TAG_TOUCH_BOTH;
loader->zone.n_points += 4;
@@ -1084,7 +1122,10 @@
#endif
- if ( recurse_count > face->max_profile.maxComponentDepth )
+ /* some fonts have an incorrect value of `maxComponentDepth', */
+ /* thus we allow depth 1 to catch the majority of them */
+ if ( recurse_count > 1 &&
+ recurse_count > face->max_profile.maxComponentDepth )
{
error = TT_Err_Invalid_Composite;
goto Exit;
@@ -1116,16 +1157,16 @@
FT_UShort advance_width = 0, advance_height = 0;
- Get_HMetrics( face, glyph_index,
- (FT_Bool)!( loader->load_flags &
- FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
- &left_bearing,
- &advance_width );
- Get_VMetrics( face, glyph_index,
- (FT_Bool)!( loader->load_flags &
- FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
- &top_bearing,
- &advance_height );
+ TT_Get_HMetrics( face, glyph_index,
+ (FT_Bool)!( loader->load_flags &
+ FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
+ &left_bearing,
+ &advance_width );
+ TT_Get_VMetrics( face, glyph_index,
+ (FT_Bool)!( loader->load_flags &
+ FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
+ &top_bearing,
+ &advance_height );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
@@ -1214,10 +1255,31 @@
offset = tt_face_get_location( face, glyph_index,
(FT_UInt*)&loader->byte_len );
- if ( loader->byte_len == 0 )
+ if ( loader->byte_len > 0 )
+ {
+ if ( !loader->glyf_offset )
+ {
+ FT_TRACE2(( "no `glyf' table but non-zero `loca' entry\n" ));
+ error = TT_Err_Invalid_Table;
+ goto Exit;
+ }
+
+ error = face->access_glyph_frame( loader, glyph_index,
+ loader->glyf_offset + offset,
+ loader->byte_len );
+ if ( error )
+ goto Exit;
+
+ opened_frame = 1;
+
+ /* read first glyph header */
+ error = face->read_glyph_header( loader );
+ if ( error )
+ goto Exit;
+ }
+
+ if ( loader->byte_len == 0 || loader->n_contours == 0 )
{
- /* as described by Frederic Loyer, these are spaces or */
- /* the unknown glyph. */
loader->bbox.xMin = 0;
loader->bbox.xMax = 0;
loader->bbox.yMin = 0;
@@ -1260,19 +1322,6 @@
goto Exit;
}
- error = face->access_glyph_frame( loader, glyph_index,
- loader->glyf_offset + offset,
- loader->byte_len );
- if ( error )
- goto Exit;
-
- opened_frame = 1;
-
- /* read first glyph header */
- error = face->read_glyph_header( loader );
- if ( error )
- goto Exit;
-
TT_LOADER_SET_PP( loader );
/***********************************************************************/
@@ -1281,7 +1330,7 @@
/* if it is a simple glyph, load it */
- if ( loader->n_contours >= 0 )
+ if ( loader->n_contours > 0 )
{
error = face->read_simple_glyph( loader );
if ( error )
@@ -1351,8 +1400,11 @@
{
if ( subglyph->flags & ARGS_ARE_XY_VALUES )
{
- subglyph->arg1 += deltas[i].x;
- subglyph->arg2 += deltas[i].y;
+ /* XXX: overflow check for subglyph->{arg1,arg2}. */
+ /* deltas[i].{x,y} must be within signed 16-bit, */
+ /* but the restriction of summed delta is not clear */
+ subglyph->arg1 += (FT_Int16)deltas[i].x;
+ subglyph->arg2 += (FT_Int16)deltas[i].y;
}
}
@@ -1390,21 +1442,16 @@
/*********************************************************************/
{
- FT_UInt n, num_base_points;
- FT_SubGlyph subglyph = 0;
-
- FT_UInt num_points = start_point;
- FT_UInt num_subglyphs = gloader->current.num_subglyphs;
- FT_UInt num_base_subgs = gloader->base.num_subglyphs;
+ FT_UInt n, num_base_points;
+ FT_SubGlyph subglyph = 0;
- FT_Stream old_stream = loader->stream;
+ FT_UInt num_points = start_point;
+ FT_UInt num_subglyphs = gloader->current.num_subglyphs;
+ FT_UInt num_base_subgs = gloader->base.num_subglyphs;
- TT_GraphicsState saved_GS;
+ FT_Stream old_stream = loader->stream;
- if ( loader->exec )
- saved_GS = loader->exec->GS;
-
FT_GlyphLoader_Add( gloader );
/* read each subglyph independently */
@@ -1413,10 +1460,6 @@
FT_Vector pp[4];
- /* reinitialize graphics state */
- if ( loader->exec )
- loader->exec->GS = saved_GS;
-
/* Each time we call load_truetype_glyph in this loop, the */
/* value of `gloader.base.subglyphs' can change due to table */
/* reallocations. We thus need to recompute the subglyph */
@@ -1551,17 +1594,35 @@
glyph->metrics.horiBearingY = bbox.yMax;
glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
- /* Now take care of vertical metrics. In the case where there is */
- /* no vertical information within the font (relatively common), make */
- /* up some metrics by `hand'... */
+ /* adjust advance width to the value contained in the hdmx table */
+ if ( !face->postscript.isFixedPitch &&
+ IS_HINTED( loader->load_flags ) )
+ {
+ FT_Byte* widthp;
+
+
+ widthp = tt_face_get_device_metrics( face,
+ size->root.metrics.x_ppem,
+ glyph_index );
+
+ if ( widthp )
+ glyph->metrics.horiAdvance = *widthp << 6;
+ }
+
+ /* set glyph dimensions */
+ glyph->metrics.width = bbox.xMax - bbox.xMin;
+ glyph->metrics.height = bbox.yMax - bbox.yMin;
+ /* Now take care of vertical metrics. In the case where there is */
+ /* no vertical information within the font (relatively common), */
+ /* create some metrics manually */
{
FT_Pos top; /* scaled vertical top side bearing */
FT_Pos advance; /* scaled vertical advance height */
/* Get the unscaled top bearing and advance height. */
- if ( face->vertical_info &&
+ if ( face->vertical_info &&
face->vertical.number_Of_VMetrics > 0 )
{
top = (FT_Short)FT_DivFix( loader->pp3.y - bbox.yMax,
@@ -1643,30 +1704,12 @@
/* XXX: for now, we have no better algorithm for the lsb, but it */
/* should work fine. */
/* */
- glyph->metrics.vertBearingX = ( bbox.xMin - bbox.xMax ) / 2;
+ glyph->metrics.vertBearingX = glyph->metrics.horiBearingX -
+ glyph->metrics.horiAdvance / 2;
glyph->metrics.vertBearingY = top;
glyph->metrics.vertAdvance = advance;
}
- /* adjust advance width to the value contained in the hdmx table */
- if ( !face->postscript.isFixedPitch &&
- IS_HINTED( loader->load_flags ) )
- {
- FT_Byte* widthp;
-
-
- widthp = tt_face_get_device_metrics( face,
- size->root.metrics.x_ppem,
- glyph_index );
-
- if ( widthp )
- glyph->metrics.horiAdvance = *widthp << 6;
- }
-
- /* set glyph dimensions */
- glyph->metrics.width = bbox.xMax - bbox.xMin;
- glyph->metrics.height = bbox.yMax - bbox.yMin;
-
return 0;
}
@@ -1819,12 +1862,15 @@
FT_Error error = face->goto_table( face, TTAG_glyf, stream, 0 );
- if ( error )
+ if ( error == TT_Err_Table_Missing )
+ loader->glyf_offset = 0;
+ else if ( error )
{
- FT_ERROR(( "TT_Load_Glyph: could not access glyph table\n" ));
+ FT_ERROR(( "tt_loader_init: could not access glyph table\n" ));
return error;
}
- loader->glyf_offset = FT_STREAM_POS();
+ else
+ loader->glyf_offset = FT_STREAM_POS();
}
/* get face's glyph loader */
@@ -1836,7 +1882,7 @@
loader->gloader = gloader;
}
- loader->load_flags = load_flags;
+ loader->load_flags = load_flags;
loader->face = (FT_Face)face;
loader->size = (FT_Size)size;
@@ -1939,6 +1985,40 @@
FT_Outline_Translate( &glyph->outline, -loader.pp1.x, 0 );
}
+#ifdef TT_USE_BYTECODE_INTERPRETER
+
+ if ( IS_HINTED( load_flags ) )
+ {
+ if ( loader.exec->GS.scan_control )
+ {
+ /* convert scan conversion mode to FT_OUTLINE_XXX flags */
+ switch ( loader.exec->GS.scan_type )
+ {
+ case 0: /* simple drop-outs including stubs */
+ glyph->outline.flags |= FT_OUTLINE_INCLUDE_STUBS;
+ break;
+ case 1: /* simple drop-outs excluding stubs */
+ /* nothing; it's the default rendering mode */
+ break;
+ case 4: /* smart drop-outs including stubs */
+ glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS |
+ FT_OUTLINE_INCLUDE_STUBS;
+ break;
+ case 5: /* smart drop-outs excluding stubs */
+ glyph->outline.flags |= FT_OUTLINE_SMART_DROPOUTS;
+ break;
+
+ default: /* no drop-out control */
+ glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
+ break;
+ }
+ }
+ else
+ glyph->outline.flags |= FT_OUTLINE_IGNORE_DROPOUTS;
+ }
+
+#endif /* TT_USE_BYTECODE_INTERPRETER */
+
compute_glyph_metrics( &loader, glyph_index );
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 19:38:57 +0000