#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_CALC_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_SFNT_H
#include FT_TRUETYPE_TAGS_H
#include FT_OUTLINE_H
#include "ttgload.h"
#include "tterrors.h"
#undef FT_COMPONENT
#define FT_COMPONENT trace_ttgload
#define ARGS_ARE_WORDS 0x0001
#define ARGS_ARE_XY_VALUES 0x0002
#define ROUND_XY_TO_GRID 0x0004
#define WE_HAVE_A_SCALE 0x0008
#define MORE_COMPONENTS 0x0020
#define WE_HAVE_AN_XY_SCALE 0x0040
#define WE_HAVE_A_2X2 0x0080
#define WE_HAVE_INSTR 0x0100
#define USE_MY_METRICS 0x0200
#define OVERLAP_COMPOUND 0x0400
#define SCALED_COMPONENT_OFFSET 0x0800
#define UNSCALED_COMPONENT_OFFSET 0x1000
#define TT_MAX_COMPOSITE_RECURSE 5
FT_LOCAL_DEF( void )
TT_Get_Metrics( TT_HoriHeader* header,
FT_UInt idx,
FT_Short* bearing,
FT_UShort* advance )
{
TT_LongMetrics longs_m;
FT_UShort k = header->number_Of_HMetrics;
if ( k == 0 )
{
*bearing = *advance = 0;
return;
}
if ( idx < (FT_UInt)k )
{
longs_m = (TT_LongMetrics )header->long_metrics + idx;
*bearing = longs_m->bearing;
*advance = longs_m->advance;
}
else
{
*bearing = ((TT_ShortMetrics*)header->short_metrics)[idx - k];
*advance = ((TT_LongMetrics )header->long_metrics)[k - 1].advance;
}
}
static void
Get_HMetrics( TT_Face face,
FT_UInt idx,
FT_Bool check,
FT_Short* lsb,
FT_UShort* aw )
{
TT_Get_Metrics( &face->horizontal, idx, lsb, aw );
if ( check && face->postscript.isFixedPitch )
*aw = face->horizontal.advance_Width_Max;
}
static FT_Byte*
Get_Advance_Widths( TT_Face face,
FT_UShort ppem )
{
FT_UShort n;
for ( n = 0; n < face->hdmx.num_records; n++ )
if ( face->hdmx.records[n].ppem == ppem )
return face->hdmx.records[n].widths;
return NULL;
}
#define cur_to_org( n, zone ) \
FT_MEM_COPY( (zone)->org, (zone)->cur, (n) * sizeof ( FT_Vector ) )
#define org_to_cur( n, zone ) \
FT_MEM_COPY( (zone)->cur, (zone)->org, (n) * sizeof ( FT_Vector ) )
static void
translate_array( FT_UInt n,
FT_Vector* coords,
FT_Pos delta_x,
FT_Pos delta_y )
{
FT_UInt k;
if ( delta_x )
for ( k = 0; k < n; k++ )
coords[k].x += delta_x;
if ( delta_y )
for ( k = 0; k < n; k++ )
coords[k].y += delta_y;
}
static void
tt_prepare_zone( TT_GlyphZone zone,
FT_GlyphLoad load,
FT_UInt start_point,
FT_UInt start_contour )
{
zone->n_points = (FT_UShort)( load->outline.n_points - start_point );
zone->n_contours = (FT_Short) ( load->outline.n_contours - start_contour );
zone->org = load->extra_points + start_point;
zone->cur = load->outline.points + start_point;
zone->tags = (FT_Byte*)load->outline.tags + start_point;
zone->contours = (FT_UShort*)load->outline.contours + start_contour;
}
#undef IS_HINTED
#define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 )
FT_CALLBACK_DEF( FT_Error )
TT_Access_Glyph_Frame( TT_Loader loader,
FT_UInt glyph_index,
FT_ULong offset,
FT_UInt byte_count )
{
FT_Error error;
FT_Stream stream = loader->stream;
FT_UNUSED( glyph_index );
FT_TRACE5(( "Glyph %ld\n", glyph_index ));
if ( FT_STREAM_SEEK( offset ) || FT_FRAME_ENTER( byte_count ) )
return error;
return TT_Err_Ok;
}
FT_CALLBACK_DEF( void )
TT_Forget_Glyph_Frame( TT_Loader loader )
{
FT_Stream stream = loader->stream;
FT_FRAME_EXIT();
}
FT_CALLBACK_DEF( FT_Error )
TT_Load_Glyph_Header( TT_Loader loader )
{
FT_Stream stream = loader->stream;
FT_Int byte_len = loader->byte_len - 10;
if ( byte_len < 0 )
return TT_Err_Invalid_Outline;
loader->n_contours = FT_GET_SHORT();
loader->bbox.xMin = FT_GET_SHORT();
loader->bbox.yMin = FT_GET_SHORT();
loader->bbox.xMax = FT_GET_SHORT();
loader->bbox.yMax = FT_GET_SHORT();
FT_TRACE5(( " # of contours: %d\n", loader->n_contours ));
FT_TRACE5(( " xMin: %4d xMax: %4d\n", loader->bbox.xMin,
loader->bbox.xMax ));
FT_TRACE5(( " yMin: %4d yMax: %4d\n", loader->bbox.yMin,
loader->bbox.yMax ));
loader->byte_len = byte_len;
return TT_Err_Ok;
}
FT_CALLBACK_DEF( FT_Error )
TT_Load_Simple_Glyph( TT_Loader load )
{
FT_Error error;
FT_Stream stream = load->stream;
FT_GlyphLoader gloader = load->gloader;
FT_Int n_contours = load->n_contours;
FT_Outline* outline;
TT_Face face = (TT_Face)load->face;
TT_GlyphSlot slot = (TT_GlyphSlot)load->glyph;
FT_UShort n_ins;
FT_Int n, n_points;
FT_Int byte_len = load->byte_len;
{
short* cur = gloader->current.outline.contours;
short* limit = cur + n_contours;
byte_len -= 2 * ( n_contours + 1 );
if ( byte_len < 0 )
goto Invalid_Outline;
for ( ; cur < limit; cur++ )
cur[0] = FT_GET_USHORT();
n_points = 0;
if ( n_contours > 0 )
n_points = cur[-1] + 1;
error = FT_GlyphLoader_CheckPoints( gloader, n_points + 2, 0 );
if ( error )
goto Fail;
outline = &gloader->current.outline;
for ( cur = outline->contours + 1; cur < limit; cur++ )
if ( cur[-1] >= cur[0] )
goto Invalid_Outline;
}
slot->control_len = 0;
slot->control_data = 0;
n_ins = FT_GET_USHORT();
FT_TRACE5(( " Instructions size: %d\n", n_ins ));
if ( n_ins > face->max_profile.maxSizeOfInstructions )
{
FT_TRACE0(( "TT_Load_Simple_Glyph: Too many instructions!\n" ));
error = TT_Err_Too_Many_Hints;
goto Fail;
}
byte_len -= n_ins;
if ( byte_len < 0 )
{
FT_TRACE0(( "TT_Load_Simple_Glyph: Instruction count mismatch!\n" ));
error = TT_Err_Too_Many_Hints;
goto Fail;
}
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( ( load->load_flags &
( FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING ) ) == 0 &&
load->instructions )
{
slot->control_len = n_ins;
slot->control_data = load->instructions;
FT_MEM_COPY( load->instructions, stream->cursor, n_ins );
}
#endif
stream->cursor += n_ins;
{
FT_Byte* flag = (FT_Byte*)outline->tags;
FT_Byte* limit = flag + n_points;
FT_Byte c, count;
while ( flag < limit )
{
if ( --byte_len < 0 )
goto Invalid_Outline;
*flag++ = c = FT_GET_BYTE();
if ( c & 8 )
{
if ( --byte_len < 0 )
goto Invalid_Outline;
count = FT_GET_BYTE();
if ( flag + count > limit )
goto Invalid_Outline;
for ( ; count > 0; count-- )
*flag++ = c;
}
}
for ( flag = (FT_Byte*)outline->tags; flag < limit; flag++ )
{
if ( *flag & 2 )
byte_len -= 1;
else if ( ( *flag & 16 ) == 0 )
byte_len -= 2;
if ( *flag & 4 )
byte_len -= 1;
else if ( ( *flag & 32 ) == 0 )
byte_len -= 2;
}
if ( byte_len < 0 )
goto Invalid_Outline;
}
{
FT_Vector* vec = outline->points;
FT_Vector* limit = vec + n_points;
FT_Byte* flag = (FT_Byte*)outline->tags;
FT_Pos x = 0;
for ( ; vec < limit; vec++, flag++ )
{
FT_Pos y = 0;
if ( *flag & 2 )
{
y = FT_GET_BYTE();
if ( ( *flag & 16 ) == 0 )
y = -y;
}
else if ( ( *flag & 16 ) == 0 )
y = FT_GET_SHORT();
x += y;
vec->x = x;
}
}
{
FT_Vector* vec = gloader->current.outline.points;
FT_Vector* limit = vec + n_points;
FT_Byte* flag = (FT_Byte*)outline->tags;
FT_Pos x = 0;
for ( ; vec < limit; vec++, flag++ )
{
FT_Pos y = 0;
if ( *flag & 4 )
{
y = FT_GET_BYTE();
if ( ( *flag & 32 ) == 0 )
y = -y;
}
else if ( ( *flag & 32 ) == 0 )
y = FT_GET_SHORT();
x += y;
vec->y = x;
}
}
for ( n = 0; n < n_points; n++ )
outline->tags[n] &= FT_CURVE_TAG_ON;
outline->n_points = (FT_UShort)n_points;
outline->n_contours = (FT_Short) n_contours;
load->byte_len = byte_len;
Fail:
return error;
Invalid_Outline:
error = TT_Err_Invalid_Outline;
goto Fail;
}
FT_CALLBACK_DEF( FT_Error )
TT_Load_Composite_Glyph( TT_Loader loader )
{
FT_Error error;
FT_Stream stream = loader->stream;
FT_GlyphLoader gloader = loader->gloader;
FT_SubGlyph subglyph;
FT_UInt num_subglyphs;
FT_Int byte_len = loader->byte_len;
num_subglyphs = 0;
do
{
FT_Fixed xx, xy, yy, yx;
error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs + 1 );
if ( error )
goto Fail;
byte_len -= 4;
if ( byte_len < 0 )
goto Invalid_Composite;
subglyph = gloader->current.subglyphs + num_subglyphs;
subglyph->arg1 = subglyph->arg2 = 0;
subglyph->flags = FT_GET_USHORT();
subglyph->index = FT_GET_USHORT();
byte_len -= 2;
if ( subglyph->flags & ARGS_ARE_WORDS )
byte_len -= 2;
if ( subglyph->flags & WE_HAVE_A_SCALE )
byte_len -= 2;
else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
byte_len -= 4;
else if ( subglyph->flags & WE_HAVE_A_2X2 )
byte_len -= 8;
if ( byte_len < 0 )
goto Invalid_Composite;
if ( subglyph->flags & ARGS_ARE_WORDS )
{
subglyph->arg1 = FT_GET_SHORT();
subglyph->arg2 = FT_GET_SHORT();
}
else
{
subglyph->arg1 = FT_GET_CHAR();
subglyph->arg2 = FT_GET_CHAR();
}
xx = yy = 0x10000L;
xy = yx = 0;
if ( subglyph->flags & WE_HAVE_A_SCALE )
{
xx = (FT_Fixed)FT_GET_SHORT() << 2;
yy = xx;
}
else if ( subglyph->flags & WE_HAVE_AN_XY_SCALE )
{
xx = (FT_Fixed)FT_GET_SHORT() << 2;
yy = (FT_Fixed)FT_GET_SHORT() << 2;
}
else if ( subglyph->flags & WE_HAVE_A_2X2 )
{
xx = (FT_Fixed)FT_GET_SHORT() << 2;
yx = (FT_Fixed)FT_GET_SHORT() << 2;
xy = (FT_Fixed)FT_GET_SHORT() << 2;
yy = (FT_Fixed)FT_GET_SHORT() << 2;
}
subglyph->transform.xx = xx;
subglyph->transform.xy = xy;
subglyph->transform.yx = yx;
subglyph->transform.yy = yy;
num_subglyphs++;
} while ( subglyph->flags & MORE_COMPONENTS );
gloader->current.num_subglyphs = num_subglyphs;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
{
loader->ins_pos = (FT_ULong)( FT_STREAM_POS() +
stream->cursor - stream->limit );
}
#endif
loader->byte_len = byte_len;
Fail:
return error;
Invalid_Composite:
error = TT_Err_Invalid_Composite;
goto Fail;
}
FT_LOCAL_DEF( void )
TT_Init_Glyph_Loading( TT_Face face )
{
face->access_glyph_frame = TT_Access_Glyph_Frame;
face->read_glyph_header = TT_Load_Glyph_Header;
face->read_simple_glyph = TT_Load_Simple_Glyph;
face->read_composite_glyph = TT_Load_Composite_Glyph;
face->forget_glyph_frame = TT_Forget_Glyph_Frame;
}
static FT_Error
TT_Process_Simple_Glyph( TT_Loader load,
FT_Bool debug )
{
FT_GlyphLoader gloader = load->gloader;
FT_Outline* outline = &gloader->current.outline;
FT_UInt n_points = outline->n_points;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
FT_UInt n_ins;
#endif
TT_GlyphZone zone = &load->zone;
FT_Error error = TT_Err_Ok;
FT_UNUSED( debug );
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
n_ins = load->glyph->control_len;
#endif
{
FT_Vector* pp1;
FT_Vector* pp2;
pp1 = outline->points + n_points;
pp1->x = load->bbox.xMin - load->left_bearing;
pp1->y = 0;
pp2 = pp1 + 1;
pp2->x = pp1->x + load->advance;
pp2->y = 0;
outline->tags[n_points ] = 0;
outline->tags[n_points + 1] = 0;
}
n_points += 2;
tt_prepare_zone( zone, &gloader->current, 0, 0 );
if ( !( load->load_flags & FT_LOAD_NO_SCALE ) )
{
FT_Vector* vec = zone->cur;
FT_Vector* limit = vec + n_points;
FT_Fixed x_scale = load->size->metrics.x_scale;
FT_Fixed y_scale = load->size->metrics.y_scale;
for ( ; vec < limit; vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
}
cur_to_org( n_points, zone );
if ( IS_HINTED( load->load_flags ) )
{
FT_Pos x = zone->org[n_points-2].x;
x = ( ( x + 32 ) & -64 ) - x;
translate_array( n_points, zone->org, x, 0 );
org_to_cur( n_points, zone );
zone->cur[n_points - 1].x = ( zone->cur[n_points - 1].x + 32 ) & -64;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( n_ins > 0 )
{
error = TT_Set_CodeRange( load->exec, tt_coderange_glyph,
load->exec->glyphIns, n_ins );
if ( error )
goto Exit;
load->exec->is_composite = FALSE;
load->exec->pedantic_hinting = (FT_Bool)( load->load_flags &
FT_LOAD_PEDANTIC );
load->exec->pts = *zone;
load->exec->pts.n_points += 2;
error = TT_Run_Context( load->exec, debug );
if ( error && load->exec->pedantic_hinting )
goto Exit;
error = TT_Err_Ok;
}
#endif
}
if ( !load->preserve_pps )
{
load->pp1 = zone->cur[n_points - 2];
load->pp2 = zone->cur[n_points - 1];
}
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
Exit:
#endif
return error;
}
static FT_Error
load_truetype_glyph( TT_Loader loader,
FT_UInt glyph_index,
FT_UInt recurse_count )
{
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
FT_Stream stream = loader->stream;
#endif
FT_Error error;
TT_Face face = (TT_Face)loader->face;
FT_ULong offset;
FT_Int contours_count;
FT_UInt num_points, count;
FT_Fixed x_scale, y_scale;
FT_GlyphLoader gloader = loader->gloader;
FT_Bool opened_frame = 0;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
struct FT_StreamRec_ inc_stream;
FT_Data glyph_data;
FT_Bool glyph_data_loaded = 0;
#endif
if ( recurse_count >= TT_MAX_COMPOSITE_RECURSE )
{
error = TT_Err_Invalid_Composite;
goto Exit;
}
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
{
error = TT_Err_Invalid_Glyph_Index;
goto Exit;
}
loader->glyph_index = glyph_index;
num_points = 0;
x_scale = 0x10000L;
y_scale = 0x10000L;
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
x_scale = loader->size->metrics.x_scale;
y_scale = loader->size->metrics.y_scale;
}
{
FT_Short left_bearing = 0;
FT_UShort advance_width = 0;
Get_HMetrics( face, glyph_index,
(FT_Bool)!( loader->load_flags &
FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ),
&left_bearing,
&advance_width );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec metrics;
metrics.bearing_x = left_bearing;
metrics.bearing_y = 0;
metrics.advance = advance_width;
error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, FALSE, &metrics );
if ( error )
goto Exit;
left_bearing = (FT_Short)metrics.bearing_x;
advance_width = (FT_UShort)metrics.advance;
}
#endif
loader->left_bearing = left_bearing;
loader->advance = advance_width;
if ( !loader->linear_def )
{
loader->linear_def = 1;
loader->linear = advance_width;
}
}
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( face->root.internal->incremental_interface )
{
error = face->root.internal->incremental_interface->funcs->get_glyph_data(
face->root.internal->incremental_interface->object,
glyph_index, &glyph_data );
if ( error )
goto Exit;
glyph_data_loaded = 1;
offset = 0;
count = glyph_data.length;
FT_MEM_ZERO( &inc_stream, sizeof ( inc_stream ) );
FT_Stream_OpenMemory( &inc_stream,
glyph_data.pointer, glyph_data.length );
loader->stream = &inc_stream;
}
else
#endif
{
offset = face->glyph_locations[glyph_index];
count = 0;
if ( glyph_index < (FT_UInt)face->num_locations - 1 )
count = face->glyph_locations[glyph_index + 1] - offset;
}
if ( count == 0 )
{
loader->bbox.xMin = 0;
loader->bbox.xMax = 0;
loader->bbox.yMin = 0;
loader->bbox.yMax = 0;
loader->pp1.x = 0;
loader->pp2.x = loader->advance;
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( loader->exec )
loader->exec->glyphSize = 0;
#endif
error = TT_Err_Ok;
goto Exit;
}
loader->byte_len = (FT_Int)count;
offset = loader->glyf_offset + offset;
error = face->access_glyph_frame( loader, glyph_index, offset, count );
if ( error )
goto Exit;
opened_frame = 1;
error = face->read_glyph_header( loader );
if ( error )
goto Fail;
contours_count = loader->n_contours;
count -= 10;
loader->pp1.x = loader->bbox.xMin - loader->left_bearing;
loader->pp1.y = 0;
loader->pp2.x = loader->pp1.x + loader->advance;
loader->pp2.y = 0;
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
{
loader->pp1.x = FT_MulFix( loader->pp1.x, x_scale );
loader->pp2.x = FT_MulFix( loader->pp2.x, x_scale );
}
if ( contours_count >= 0 )
{
error = FT_GlyphLoader_CheckPoints( gloader, 0, contours_count );
if ( error )
goto Fail;
error = face->read_simple_glyph( loader );
if ( error )
goto Fail;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
{
TT_Size size = (TT_Size)loader->size;
error = TT_Process_Simple_Glyph( loader,
(FT_Bool)( size && size->debug ) );
}
#else
error = TT_Process_Simple_Glyph( loader, 0 );
#endif
if ( error )
goto Fail;
FT_GlyphLoader_Add( gloader );
}
else if ( contours_count == -1 )
{
TT_GlyphSlot glyph = (TT_GlyphSlot)loader->glyph;
FT_UInt start_point;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
FT_UInt start_contour;
FT_ULong ins_pos;
#endif
start_point = gloader->base.outline.n_points;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
start_contour = gloader->base.outline.n_contours;
#endif
error = face->read_composite_glyph( loader );
if ( error )
goto Fail;
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
ins_pos = loader->ins_pos;
#endif
face->forget_glyph_frame( loader );
opened_frame = 0;
if ( loader->load_flags & FT_LOAD_NO_RECURSE )
{
FT_GlyphLoader_Add( gloader );
glyph->num_subglyphs = gloader->base.num_subglyphs;
glyph->format = FT_GLYPH_FORMAT_COMPOSITE;
glyph->subglyphs = gloader->base.subglyphs;
goto Exit;
}
{
FT_Int n, num_base_points, num_new_points;
FT_SubGlyph subglyph = 0;
FT_UInt num_subglyphs = gloader->current.num_subglyphs;
FT_UInt num_base_subgs = gloader->base.num_subglyphs;
FT_GlyphLoader_Add( gloader );
for ( n = 0; n < (FT_Int)num_subglyphs; n++ )
{
FT_Vector pp1, pp2;
FT_Pos x, y;
subglyph = gloader->base.subglyphs + num_base_subgs + n;
pp1 = loader->pp1;
pp2 = loader->pp2;
num_base_points = gloader->base.outline.n_points;
error = load_truetype_glyph( loader, subglyph->index,
recurse_count+1 );
if ( error )
goto Fail;
subglyph = gloader->base.subglyphs + num_base_subgs + n;
if ( subglyph->flags & USE_MY_METRICS )
{
pp1 = loader->pp1;
pp2 = loader->pp2;
}
else
{
loader->pp1 = pp1;
loader->pp2 = pp2;
}
num_points = gloader->base.outline.n_points;
num_new_points = num_points - num_base_points;
if ( subglyph->flags & ( WE_HAVE_A_SCALE |
WE_HAVE_AN_XY_SCALE |
WE_HAVE_A_2X2 ) )
{
FT_Vector* cur = gloader->base.outline.points +
num_base_points;
FT_Vector* org = gloader->base.extra_points +
num_base_points;
FT_Vector* limit = cur + num_new_points;
for ( ; cur < limit; cur++, org++ )
{
FT_Vector_Transform( cur, &subglyph->transform );
FT_Vector_Transform( org, &subglyph->transform );
}
}
if ( !( subglyph->flags & ARGS_ARE_XY_VALUES ) )
{
FT_UInt k = subglyph->arg1;
FT_UInt l = subglyph->arg2;
FT_Vector* p1;
FT_Vector* p2;
if ( start_point + k >= (FT_UInt)num_base_points ||
l >= (FT_UInt)num_new_points )
{
error = TT_Err_Invalid_Composite;
goto Fail;
}
l += num_base_points;
p1 = gloader->base.outline.points + start_point + k;
p2 = gloader->base.outline.points + start_point + l;
x = p1->x - p2->x;
y = p1->y - p2->y;
}
else
{
x = subglyph->arg1;
y = subglyph->arg2;
#ifdef TT_CONFIG_OPTION_COMPONENT_OFFSET_SCALED
if ( !( subglyph->flags & UNSCALED_COMPONENT_OFFSET ) &&
#else
if ( ( subglyph->flags & SCALED_COMPONENT_OFFSET ) &&
#endif
( subglyph->flags & ( WE_HAVE_A_SCALE |
WE_HAVE_AN_XY_SCALE |
WE_HAVE_A_2X2 )) )
{
#if 0
int a = subglyph->transform.xx > 0 ? subglyph->transform.xx
: -subglyph->transform.xx;
int b = subglyph->transform.yx > 0 ? subglyph->transform.yx
: -subglyph->transform.yx;
int c = subglyph->transform.xy > 0 ? subglyph->transform.xy
: -subglyph->transform.xy;
int d = subglyph->transform.yy > 0 ? subglyph->transform.yy
: -subglyph->transform.yy;
int m = a > b ? a : b;
int n = c > d ? c : d;
if ( a - b <= 33 && a - b >= -33 )
m *= 2;
if ( c - d <= 33 && c - d >= -33 )
n *= 2;
x = FT_MulFix( x, m );
y = FT_MulFix( y, n );
#else
int mac_xscale = FT_SqrtFixed(
FT_MulFix( subglyph->transform.xx,
subglyph->transform.xx ) +
FT_MulFix( subglyph->transform.xy,
subglyph->transform.xy) );
int mac_yscale = FT_SqrtFixed(
FT_MulFix( subglyph->transform.yy,
subglyph->transform.yy ) +
FT_MulFix( subglyph->transform.yx,
subglyph->transform.yx ) );
x = FT_MulFix( x, mac_xscale );
y = FT_MulFix( y, mac_yscale );
#endif
}
if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
{
x = FT_MulFix( x, x_scale );
y = FT_MulFix( y, y_scale );
if ( subglyph->flags & ROUND_XY_TO_GRID )
{
x = ( x + 32 ) & -64;
y = ( y + 32 ) & -64;
}
}
}
if ( x || y )
{
translate_array( num_new_points,
gloader->base.outline.points + num_base_points,
x, y );
translate_array( num_new_points,
gloader->base.extra_points + num_base_points,
x, y );
}
}
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( num_subglyphs > 0 &&
loader->exec &&
ins_pos > 0 &&
subglyph->flags & WE_HAVE_INSTR )
{
FT_UShort n_ins;
TT_ExecContext exec = loader->exec;
TT_GlyphZone pts;
FT_Vector* pp1;
if ( FT_STREAM_SEEK( ins_pos ) ||
FT_READ_USHORT( n_ins ) )
goto Fail;
FT_TRACE5(( " Instructions size = %d\n", n_ins ));
if ( n_ins == 0xFFFFU )
n_ins = 0;
if ( n_ins > face->max_profile.maxSizeOfInstructions )
{
FT_TRACE0(( "Too many instructions (%d) in composite glyph %ld\n",
n_ins, subglyph->index ));
error = TT_Err_Too_Many_Hints;
goto Fail;
}
if ( FT_STREAM_READ( exec->glyphIns, n_ins ) )
goto Fail;
glyph->control_data = exec->glyphIns;
glyph->control_len = n_ins;
error = TT_Set_CodeRange( exec,
tt_coderange_glyph,
exec->glyphIns,
n_ins );
if ( error )
goto Fail;
tt_prepare_zone( &exec->pts, &gloader->base,
start_point, start_contour );
pts = &exec->pts;
pts->n_points = (short)(num_points + 2);
pts->n_contours = gloader->base.outline.n_contours;
pp1 = pts->cur + num_points;
pp1[0] = loader->pp1;
pp1[1] = loader->pp2;
pts->tags[num_points ] = 0;
pts->tags[num_points + 1] = 0;
if ( IS_HINTED( loader->load_flags ) )
{
pp1[0].x = ( ( loader->pp1.x + 32 ) & -64 );
pp1[1].x = ( ( loader->pp2.x + 32 ) & -64 );
}
{
FT_UInt k;
for ( k = 0; k < num_points; k++ )
pts->tags[k] &= FT_CURVE_TAG_ON;
}
cur_to_org( num_points + 2, pts );
if ( IS_HINTED( loader->load_flags ) && n_ins > 0 )
{
exec->is_composite = TRUE;
exec->pedantic_hinting =
(FT_Bool)( loader->load_flags & FT_LOAD_PEDANTIC );
error = TT_Run_Context( exec, ((TT_Size)loader->size)->debug );
if ( error && exec->pedantic_hinting )
goto Fail;
}
loader->pp1 = pp1[0];
loader->pp2 = pp1[1];
}
#endif
}
}
else
{
error = TT_Err_Invalid_Outline;
goto Fail;
}
Fail:
if ( opened_frame )
face->forget_glyph_frame( loader );
Exit:
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( glyph_data_loaded )
face->root.internal->incremental_interface->funcs->free_glyph_data(
face->root.internal->incremental_interface->object,
&glyph_data );
#endif
return error;
}
static FT_Error
compute_glyph_metrics( TT_Loader loader,
FT_UInt glyph_index )
{
FT_BBox bbox;
TT_Face face = (TT_Face)loader->face;
FT_Fixed y_scale;
TT_GlyphSlot glyph = loader->glyph;
TT_Size size = (TT_Size)loader->size;
y_scale = 0x10000L;
if ( ( loader->load_flags & FT_LOAD_NO_SCALE ) == 0 )
y_scale = size->root.metrics.y_scale;
if ( glyph->format != FT_GLYPH_FORMAT_COMPOSITE )
{
glyph->outline.flags &= ~FT_OUTLINE_SINGLE_PASS;
FT_GlyphLoader_CopyPoints( glyph->internal->loader, loader->gloader );
glyph->outline = glyph->internal->loader->base.outline;
FT_Outline_Translate( &glyph->outline, -loader->pp1.x, 0 );
FT_Outline_Get_CBox( &glyph->outline, &bbox );
if ( IS_HINTED( loader->load_flags ) )
{
bbox.xMin &= -64;
bbox.yMin &= -64;
bbox.xMax = ( bbox.xMax + 63 ) & -64;
bbox.yMax = ( bbox.yMax + 63 ) & -64;
}
}
else
bbox = loader->bbox;
{
FT_Pos advance = loader->linear;
if ( face->postscript.isFixedPitch &&
( loader->load_flags & FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH ) == 0 )
advance = face->horizontal.advance_Width_Max;
glyph->linearHoriAdvance = advance;
}
glyph->metrics.horiBearingX = bbox.xMin;
glyph->metrics.horiBearingY = bbox.yMax;
glyph->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
if ( IS_HINTED( loader->load_flags ) )
glyph->metrics.horiAdvance = ( glyph->metrics.horiAdvance + 32 ) & -64;
{
FT_Short top_bearing;
FT_UShort advance_height;
FT_Pos left;
FT_Pos top;
FT_Pos advance;
if ( face->vertical_info &&
face->vertical.number_Of_VMetrics > 0 )
{
TT_Get_Metrics( (TT_HoriHeader*)&face->vertical,
glyph_index,
&top_bearing,
&advance_height );
}
else
{
if ( face->os2.version != 0xFFFFU )
{
top_bearing = (FT_Short)( face->os2.sTypoLineGap / 2 );
advance_height = (FT_UShort)( face->os2.sTypoAscender -
face->os2.sTypoDescender +
face->os2.sTypoLineGap );
}
else
{
top_bearing = (FT_Short)( face->horizontal.Line_Gap / 2 );
advance_height = (FT_UShort)( face->horizontal.Ascender +
face->horizontal.Descender +
face->horizontal.Line_Gap );
}
}
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( face->root.internal->incremental_interface &&
face->root.internal->incremental_interface->funcs->get_glyph_metrics )
{
FT_Incremental_MetricsRec metrics;
FT_Error error = 0;
metrics.bearing_x = 0;
metrics.bearing_y = top_bearing;
metrics.advance = advance_height;
error =
face->root.internal->incremental_interface->funcs->get_glyph_metrics(
face->root.internal->incremental_interface->object,
glyph_index, TRUE, &metrics );
if ( error )
return error;
top_bearing = (FT_Short)metrics.bearing_y;
advance_height = (FT_UShort)metrics.advance;
}
#endif
if ( !( loader->load_flags & FT_LOAD_NO_SCALE ) )
{
top = FT_MulFix( top_bearing + loader->bbox.yMax, y_scale )
- bbox.yMax;
advance = FT_MulFix( advance_height, y_scale );
}
else
{
top = top_bearing + loader->bbox.yMax - bbox.yMax;
advance = advance_height;
}
glyph->linearVertAdvance = advance_height;
left = ( bbox.xMin - bbox.xMax ) / 2;
if ( IS_HINTED( loader->load_flags ) )
{
left &= -64;
top = ( top + 63 ) & -64;
advance = ( advance + 32 ) & -64;
}
glyph->metrics.vertBearingX = left;
glyph->metrics.vertBearingY = top;
glyph->metrics.vertAdvance = advance;
}
if ( !face->postscript.isFixedPitch && size &&
IS_HINTED( loader->load_flags ) )
{
FT_Byte* widths = Get_Advance_Widths( face,
size->root.metrics.x_ppem );
if ( widths )
glyph->metrics.horiAdvance = widths[glyph_index] << 6;
}
glyph->metrics.width = bbox.xMax - bbox.xMin;
glyph->metrics.height = bbox.yMax - bbox.yMin;
return 0;
}
FT_LOCAL_DEF( FT_Error )
TT_Load_Glyph( TT_Size size,
TT_GlyphSlot glyph,
FT_UShort glyph_index,
FT_Int32 load_flags )
{
SFNT_Service sfnt;
TT_Face face;
FT_Stream stream;
FT_Error error;
TT_LoaderRec loader;
face = (TT_Face)glyph->face;
sfnt = (SFNT_Service)face->sfnt;
stream = face->root.stream;
error = 0;
if ( !size || ( load_flags & FT_LOAD_NO_SCALE ) ||
( load_flags & FT_LOAD_NO_RECURSE ) )
{
size = NULL;
load_flags |= FT_LOAD_NO_SCALE |
FT_LOAD_NO_HINTING |
FT_LOAD_NO_BITMAP;
}
glyph->num_subglyphs = 0;
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
if ( size &&
size->strike_index != 0xFFFFU &&
sfnt->load_sbits &&
( load_flags & FT_LOAD_NO_BITMAP ) == 0 )
{
TT_SBit_MetricsRec metrics;
error = sfnt->load_sbit_image( face,
size->strike_index,
glyph_index,
load_flags,
stream,
&glyph->bitmap,
&metrics );
if ( !error )
{
glyph->outline.n_points = 0;
glyph->outline.n_contours = 0;
glyph->metrics.width = (FT_Pos)metrics.width << 6;
glyph->metrics.height = (FT_Pos)metrics.height << 6;
glyph->metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6;
glyph->metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6;
glyph->metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6;
glyph->metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6;
glyph->metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6;
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;
glyph->bitmap_top = metrics.vertBearingY;
}
else
{
glyph->bitmap_left = metrics.horiBearingX;
glyph->bitmap_top = metrics.horiBearingY;
}
return error;
}
}
#endif
if ( load_flags & FT_LOAD_SBITS_ONLY )
return FT_Err_Invalid_Argument;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( !face->root.internal->incremental_interface )
#endif
{
error = face->goto_table( face, TTAG_glyf, stream, 0 );
if ( error )
{
FT_ERROR(( "TT_Load_Glyph: could not access glyph table\n" ));
goto Exit;
}
}
FT_MEM_ZERO( &loader, sizeof ( loader ) );
{
FT_GlyphLoader gloader = FT_FACE_DRIVER(face)->glyph_loader;
loader.gloader = gloader;
FT_GlyphLoader_Rewind( gloader );
tt_prepare_zone( &loader.zone, &gloader->base, 0, 0 );
tt_prepare_zone( &loader.base, &gloader->base, 0, 0 );
}
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( size )
{
loader.exec = size->debug ? size->context : TT_New_Context( face );
if ( !loader.exec )
return TT_Err_Could_Not_Find_Context;
TT_Load_Context( loader.exec, face, size );
loader.instructions = loader.exec->glyphIns;
if ( size->GS.instruct_control & 2 )
loader.exec->GS = tt_default_graphics_state;
}
#endif
glyph->outline.flags = 0;
loader.load_flags = load_flags;
loader.face = (FT_Face)face;
loader.size = (FT_Size)size;
loader.glyph = (FT_GlyphSlot)glyph;
loader.stream = stream;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
if ( face->root.internal->incremental_interface )
loader.glyf_offset = 0;
else
#endif
loader.glyf_offset = FT_STREAM_POS();
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( size && ( size->GS.instruct_control & 1 ) )
loader.load_flags |= FT_LOAD_NO_HINTING;
#endif
glyph->format = FT_GLYPH_FORMAT_OUTLINE;
glyph->num_subglyphs = 0;
error = load_truetype_glyph( &loader, glyph_index, 0 );
if ( !error )
compute_glyph_metrics( &loader, glyph_index );
#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
if ( !size || !size->debug )
TT_Done_Context( loader.exec );
#endif
if ( size && size->root.metrics.y_ppem < 24 )
glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
Exit:
return error;
}