ref: a9369f2dc96eec2f8cdb00c4bde5b452e5b462b8
dir: /src/type1z/t1gload.c/
/*******************************************************************
*
* t1gload.c 1.0
*
* Type1 Glyph Loader.
*
* Copyright 1996-1999 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used
* modified and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
******************************************************************/
#include <t1gload.h>
#include <ftdebug.h>
#include <t1encode.h>
#include <ftstream.h>
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
/********** *********/
/********** *********/
/********** GENERIC CHARSTRINGS PARSING *********/
/********** *********/
/********** *********/
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
/*********************************************************************
*
* <Function>
* T1_Init_Builder
*
* <Description>
* Initialise a given glyph builder.
*
* <Input>
* builder :: glyph builder to initialise
* face :: current face object
* size :: current size object
* glyph :: current glyph object
*
*********************************************************************/
LOCAL_FUNC
void T1_Init_Builder( T1_Builder* builder,
T1_Face face,
T1_Size size,
T1_GlyphSlot glyph )
{
builder->path_begun = 0;
builder->load_points = 1;
builder->face = face;
builder->glyph = glyph;
builder->memory = face->root.memory;
if (glyph)
{
builder->base = glyph->root.outline;
builder->max_points = glyph->max_points;
builder->max_contours = glyph->max_contours;
}
if (size)
{
builder->scale_x = size->root.metrics.x_scale;
builder->scale_y = size->root.metrics.y_scale;
}
builder->pos_x = 0;
builder->pos_y = 0;
builder->left_bearing.x = 0;
builder->left_bearing.y = 0;
builder->advance.x = 0;
builder->advance.y = 0;
builder->base.n_points = 0;
builder->base.n_contours = 0;
builder->current = builder->base;
}
/*********************************************************************
*
* <Function>
* T1_Done_Builder
*
* <Description>
* Finalise a given glyph builder. Its content can still be
* used after the call, but the function saves important information
* within the corresponding glyph slot.
*
* <Input>
* builder :: glyph builder to initialise
*
*********************************************************************/
LOCAL_FUNC
void T1_Done_Builder( T1_Builder* builder )
{
T1_GlyphSlot glyph = builder->glyph;
if (glyph)
{
glyph->root.outline = builder->base;
glyph->max_points = builder->max_points;
glyph->max_contours = builder->max_contours;
}
}
/*********************************************************************
*
* <Function>
* T1_Init_Decoder
*
* <Description>
* Initialise a given Type 1 decoder for parsing
*
* <Input>
* decoder :: Type 1 decoder to initialise
* funcs :: hinter functions interface
*
*********************************************************************/
EXPORT_FUNC
void T1_Init_Decoder( T1_Decoder* decoder )
{
decoder->top = 0;
decoder->zone = 0;
decoder->flex_state = 0;
decoder->num_flex_vectors = 0;
/* Clear loader */
MEM_Set( &decoder->builder, 0, sizeof(decoder->builder) );
}
/* check that there is enough room for "count" more points */
static
T1_Error check_points( T1_Builder* builder,
T1_Int count )
{
FT_Outline* base = &builder->base;
FT_Outline* outline = &builder->current;
if (!builder->load_points)
return T1_Err_Ok;
count += base->n_points + outline->n_points;
/* realloc points table if necessary */
if ( count >= builder->max_points )
{
T1_Error error;
FT_Memory memory = builder->memory;
T1_Int increment = outline->points - base->points;
T1_Int current = builder->max_points;
while ( builder->max_points < count )
builder->max_points += 8;
if ( REALLOC_ARRAY( base->points, current,
builder->max_points, T1_Vector ) ||
REALLOC_ARRAY( base->flags, current,
builder->max_points, T1_Byte ) )
{
builder->error = error;
return error;
}
outline->points = base->points + increment;
outline->flags = base->flags + increment;
}
return T1_Err_Ok;
}
/* add a new point, do not check room */
static
void add_point( T1_Builder* builder,
FT_Pos x,
FT_Pos y,
FT_Byte flag )
{
FT_Outline* outline = &builder->current;
if (builder->load_points)
{
FT_Vector* point = outline->points + outline->n_points;
FT_Byte* control = (FT_Byte*)outline->flags + outline->n_points;
point->x = x;
point->y = y;
*control = ( flag ? FT_Curve_Tag_On : FT_Curve_Tag_Cubic );
builder->last = *point;
}
outline->n_points++;
}
/* check room for a new on-curve point, then add it */
static
T1_Error add_point1( T1_Builder* builder,
FT_Pos x,
FT_Pos y )
{
T1_Error error;
error = check_points(builder,1);
if (!error)
add_point( builder, x, y, 1 );
return error;
}
/* check room for a new contour, then add it */
static
T1_Error add_contour( T1_Builder* builder )
{
FT_Outline* base = &builder->base;
FT_Outline* outline = &builder->current;
if (!builder->load_points)
{
outline->n_contours++;
return T1_Err_Ok;
}
/* realloc contours array if necessary */
if ( base->n_contours + outline->n_contours >= builder->max_contours &&
builder->load_points )
{
T1_Error error;
FT_Memory memory = builder->memory;
T1_Int increment = outline->contours - base->contours;
T1_Int current = builder->max_contours;
builder->max_contours += 4;
if ( REALLOC_ARRAY( base->contours,
current, builder->max_contours, T1_Short ) )
{
builder->error = error;
return error;
}
outline->contours = base->contours + increment;
}
if (outline->n_contours > 0)
outline->contours[ outline->n_contours-1 ] = outline->n_points-1;
return T1_Err_Ok;
}
/* if a path was begun, add its first on-curve point */
static
T1_Error start_point( T1_Builder* builder,
T1_Pos x,
T1_Pos y )
{
return builder->path_begun && add_point1( builder, x, y );
}
/* close the current contour */
static
void close_contour( T1_Builder* builder )
{
FT_Outline* outline = &builder->current;
if ( outline->n_contours > 0 )
outline->contours[outline->n_contours-1] = outline->n_points-1;
}
/*********************************************************************
*
* <Function>
* lookup_glyph_by_stdcharcode
*
* <Description>
* Lookup a given glyph by its StandardEncoding charcode. Used
* to implement the SEAC Type 1 operator.
*
* <Input>
* face :: current face object
* charcode :: charcode to look for
*
* <Return>
* glyph index in font face. Returns -1 if the corresponding
* glyph wasn't found.
*
*********************************************************************/
static
T1_Int lookup_glyph_by_stdcharcode( T1_Face face,
T1_Int charcode )
{
T1_Int n;
const T1_String* glyph_name;
/* check range of standard char code */
if (charcode < 0 || charcode > 255)
return -1;
glyph_name = t1_standard_strings[t1_standard_encoding[charcode]];
for ( n = 0; n < face->type1.num_glyphs; n++ )
{
T1_String* name = (T1_String*)face->type1.glyph_names[n];
if ( name && name[0] == glyph_name[0] && strcmp(name,glyph_name) == 0 )
return n;
}
return -1;
}
/*********************************************************************
*
* <Function>
* t1operator_seac
*
* <Description>
* Implements the "seac" Type 1 operator for a Type 1 decoder
*
* <Input>
* decoder :: current Type 1 decoder
* asb :: accent's side bearing
* adx :: horizontal position of accent
* ady :: vertical position of accent
* bchar :: base character's StandardEncoding charcode
* achar :: accent character's StandardEncoding charcode
*
* <Return>
* Error code. 0 means success.
*
*********************************************************************/
static
T1_Error t1operator_seac( T1_Decoder* decoder,
T1_Pos asb,
T1_Pos adx,
T1_Pos ady,
T1_Int bchar,
T1_Int achar )
{
T1_Error error;
T1_Face face = decoder->builder.face;
T1_Int bchar_index, achar_index, n_base_points;
FT_Outline* cur = &decoder->builder.current;
FT_Outline* base = &decoder->builder.base;
T1_Vector left_bearing, advance;
T1_Font* type1 = &face->type1;
bchar_index = lookup_glyph_by_stdcharcode( face, bchar );
achar_index = lookup_glyph_by_stdcharcode( face, achar );
if (bchar_index < 0 || achar_index < 0)
{
FT_ERROR(( "T1.Parse_Seac : invalid seac character code arguments\n" ));
return T1_Err_Syntax_Error;
}
/* First load "bchar" in builder */
/* now load the unscaled outline */
cur->n_points = 0;
cur->n_contours = 0;
cur->points = base->points + base->n_points;
cur->flags = base->flags + base->n_points;
cur->contours = base->contours + base->n_contours;
error = T1_Parse_CharStrings( decoder,
type1->charstrings [bchar_index],
type1->charstrings_len[bchar_index],
type1->num_subrs,
type1->subrs,
type1->subrs_len );
if (error) return error;
n_base_points = cur->n_points;
/* save the left bearing and width of the base character */
/* as they will be erase by the next load.. */
left_bearing = decoder->builder.left_bearing;
advance = decoder->builder.advance;
decoder->builder.left_bearing.x = 0;
decoder->builder.left_bearing.y = 0;
/* Now load "achar" on top of */
/* the base outline */
/* */
cur->n_points = 0;
cur->n_contours = 0;
cur->points = base->points + base->n_points;
cur->flags = base->flags + base->n_points;
cur->contours = base->contours + base->n_contours;
error = T1_Parse_CharStrings( decoder,
type1->charstrings [achar_index],
type1->charstrings_len[achar_index],
type1->num_subrs,
type1->subrs,
type1->subrs_len );
if (error) return error;
/* adjust contours in accented character outline */
if (decoder->builder.load_points)
{
T1_Int n;
for ( n = 0; n < cur->n_contours; n++ )
cur->contours[n] += n_base_points;
}
/* restore the left side bearing and */
/* advance width of the base character */
decoder->builder.left_bearing = left_bearing;
decoder->builder.advance = advance;
/* Finally, move the accent */
if (decoder->builder.load_points)
FT_Translate_Outline( cur, adx - asb, ady );
(void)asb; /* ignore this parameter */
return T1_Err_Ok;
}
/*********************************************************************
*
* <Function>
* T1_Parse_CharStrings
*
* <Description>
* Parses a given Type 1 charstrings program
*
* <Input>
* decoder :: current Type 1 decoder
* charstring_base :: base of the charstring stream
* charstring_len :: length in bytes of the charstring stream
* num_subrs :: number of sub-routines
* subrs_base :: array of sub-routines addresses
* subrs_len :: array of sub-routines lengths
*
* <Return>
* Error code. 0 means success.
*
*********************************************************************/
#define USE_ARGS(n) top -= n; if (top < decoder->stack) goto Stack_Underflow
EXPORT_FUNC
T1_Error T1_Parse_CharStrings( T1_Decoder* decoder,
T1_Byte* charstring_base,
T1_Int charstring_len,
T1_Int num_subrs,
T1_Byte** subrs_base,
T1_Int* subrs_len )
{
T1_Error error;
T1_Decoder_Zone* zone;
T1_Byte* ip;
T1_Byte* limit;
T1_Builder* builder = &decoder->builder;
FT_Outline* outline;
T1_Pos x, y;
/* First of all, initialise the decoder */
decoder->top = decoder->stack;
decoder->zone = decoder->zones;
zone = decoder->zones;
builder->path_begun = 0;
zone->base = charstring_base;
limit = zone->limit = charstring_base + charstring_len;
ip = zone->cursor = zone->base;
error = T1_Err_Ok;
outline = &builder->current;
x = builder->pos_x;
y = builder->pos_y;
/* now, execute loop */
while ( ip < limit )
{
T1_Int* top = decoder->top;
/* First of all, decompress operator or value */
switch (*ip++)
{
case 1: /* hstem */
case 3: /* vstem */
{
Clear_Stack:
top = decoder->stack;
break;
}
case 4: /* vmoveto */
{
USE_ARGS(1);
y += top[0];
builder->path_begun = 1;
goto Clear_Stack;
}
case 5: /* rlineto */
{
if ( start_point( builder, x, y ) ) goto Memory_Error;
USE_ARGS(2);
x += top[0];
y += top[1];
Add_Line:
if (add_point1( builder, top[0], top[1] )) goto Memory_Error;
goto Clear_Stack;
}
case 6: /* hlineto */
{
if ( start_point( builder, x, y ) ) goto Memory_Error;
USE_ARGS(1);
x += top[0];
goto Add_Line;
}
case 7: /* vlineto */
{
if ( start_point( builder, x, y ) ) goto Memory_Error;
USE_ARGS(1);
y += top[0];
goto Add_Line;
}
case 8: /* rrcurveto */
{
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) ) goto Memory_Error;
USE_ARGS(6);
x += top[0];
y += top[1];
add_point( builder, x, y, 0 );
x += top[2];
y += top[3];
add_point( builder, x, y, 0 );
x += top[4];
y += top[5];
add_point( builder, x, y, 1 );
goto Clear_Stack;
}
case 9: /* closepath */
{
close_contour( builder );
builder->path_begun = 0;
}
break;
case 10: /* callsubr */
{
T1_Int index;
USE_ARGS(1);
index = top[0];
if ( index < 0 || index >= num_subrs )
{
FT_ERROR(( "T1.Parse_CharStrings : invalid subrs index\n" ));
goto Syntax_Error;
}
if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
{
FT_ERROR(( "T1.Parse_CharStrings : too many nested subrs\n" ));
goto Syntax_Error;
}
zone->cursor = ip; /* save current instruction pointer */
zone++;
zone->base = subrs_base[index];
zone->limit = zone->base + subrs_len[index];
zone->cursor = zone->base;
if (!zone->base)
{
FT_ERROR(( "T1.Parse_CharStrings : invoking empty subrs !!\n" ));
goto Syntax_Error;
}
decoder->zone = zone;
ip = zone->base;
limit = zone->limit;
/* do not clear stack */
}
break;
case 11: /* return */
{
if ( zone <= decoder->zones )
{
FT_ERROR(( "T1.Parse_CharStrings : unexpected return\n" ));
goto Syntax_Error;
}
zone--;
ip = zone->cursor;
limit = zone->limit;
decoder->zone = zone;
}
break;
case 13: /* hsbw */
{
USE_ARGS(2);
builder->left_bearing.x += top[0];
builder->advance.x = top[1];
builder->advance.y = 0;
builder->last.x = x = top[0];
builder->last.y = y = 0;
/* the "metrics_only" indicates that we only want to compute */
/* the glyph's metrics (lsb + advance width), not load the */
/* rest of it.. so exit immediately */
if (builder->metrics_only)
return T1_Err_Ok;
goto Clear_Stack;
}
case 14: /* endchar */
{
close_contour( builder );
/* add current outline to the glyph slot */
builder->base.n_points += builder->current.n_points;
builder->base.n_contours += builder->current.n_contours;
/* return now !! */
return T1_Err_Ok;
}
case 21: /* rmoveto */
{
USE_ARGS(2);
x += top[0];
y += top[1];
goto Clear_Stack;
}
case 22: /* hmoveto */
{
USE_ARGS(1);
x += top[0];
goto Clear_Stack;
}
case 30: /* vhcurveto */
{
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) ) goto Memory_Error;
USE_ARGS(4);
y += top[0];
add_point( builder, x, y, 0 );
x += top[1];
y += top[2];
add_point( builder, x, y, 0 );
x += top[3];
add_point( builder, x, y, 1 );
goto Clear_Stack;
}
case 31: /* hvcurveto */
{
if ( start_point( builder, x, y ) ||
check_points( builder, 3 ) ) goto Memory_Error;
USE_ARGS(4);
x += top[0];
add_point( builder, x, y, 0 );
x += top[1];
y += top[2];
add_point( builder, x, y, 0 );
y += top[3];
add_point( builder, x, y, 1 );
goto Clear_Stack;
}
case 12:
{
if (ip > limit)
{
FT_ERROR(( "T1.Parse_CharStrings : invalid escape (12+EOF)\n" ));
goto Syntax_Error;
}
switch (*ip++)
{
case 0: /* dotsection */
case 1: /* vstem3 */
case 2: /* hstem3 */
goto Clear_Stack;
case 6: /* seac */
{
USE_ARGS(5);
/* return immediately to implement an accented character */
return t1operator_seac( decoder,
top[0], top[1], top[3],
top[4], top[5] );
}
case 7: /* sbw */
{
USE_ARGS(4);
builder->left_bearing.x += top[0];
builder->left_bearing.y += top[1];
builder->advance.x = top[2];
builder->advance.y = top[3];
builder->last.x = x = top[0];
builder->last.y = y = top[1];
/* the "metrics_only" indicates that we only want to compute */
/* the glyph's metrics (lsb + advance width), not load the */
/* rest of it.. so exit immediately */
if (builder->metrics_only)
return T1_Err_Ok;
goto Clear_Stack;
}
case 12: /* div */
{
USE_ARGS(2);
top[0] /= top[1];
top++;
}
break;
case 16: /* callothersubr */
{
USE_ARGS(1);
switch (top[0])
{
case 1: /* start flex feature ---------------------- */
{
decoder->flex_state = 1;
decoder->num_flex_vectors = 0;
if ( start_point(builder, x, y) ||
check_points(builder,6) ) goto Memory_Error;
}
break;
case 2: /* add flex vectors ------------------------ */
{
T1_Int index;
/* note that we should not add a point for index 0 */
/* this will move our current position to the flex */
/* point without adding any point to the outline */
index = decoder->num_flex_vectors++;
if (index > 0 && index < 7)
add_point( builder,
x,
y,
(T1_Byte)( index==3 || index==6 ) );
}
break;
case 0: /* end flex feature ------------------------- */
{
USE_ARGS(3); /* ignore parameters */
if ( decoder->flex_state == 0 ||
decoder->num_flex_vectors != 7 )
{
FT_ERROR(( "T1.Parse_CharStrings: unexpected flex end\n" ));
goto Syntax_Error;
}
/* now consume the remaining "pop pop setcurpoint" */
if ( ip+6 > limit ||
ip[0] != 12 || ip[1] != 17 || /* pop */
ip[2] != 12 || ip[3] != 17 || /* pop */
ip[4] != 12 || ip[5] != 33 ) /* setcurpoint */
{
FT_ERROR(( "T1.Parse_CharStrings: invalid flex charstring\n" ));
goto Syntax_Error;
}
ip += 6;
decoder->flex_state = 0;
decoder->top = top;
goto Clear_Stack;
}
case 3: /* change hints ---------------------------- */
{
/* eat the following "pop" */
if (ip+2 > limit)
{
FT_ERROR(( "T1.Parse_CharStrings: invalid escape (12+%d)\n",
ip[-1] ));
goto Syntax_Error;
}
if (ip[0] != 12 || ip[1] != 17)
{
FT_ERROR(( "T1.Parse_CharStrings: 'pop' expected, found (%d %d)\n",
ip[0], ip[1] ));
goto Syntax_Error;
}
ip += 2;
goto Clear_Stack;
}
default:
FT_ERROR(( "T1.Parse_CharStrings: invalid othersubr %d !!\n",
top[0] ));
goto Syntax_Error;
}
}
case 17: /* pop - should not happen !! */
{
FT_ERROR(( "T1.Parse_CharStrings : 'pop' should not happen !!\n" ));
goto Syntax_Error;
}
case 33: /* setcurrentpoint */
{
FT_ERROR(( "T1.Parse_CharStrings : 'setcurrentpoint' should not happen !!\n" ));
goto Syntax_Error;
}
default:
FT_ERROR(( "T1.Parse_CharStrings : invalid escape (12+%d)\n",
ip[-1] ));
goto Syntax_Error;
}
}
break; /* escape - 12 */
case 255: /* four bytes integer */
{
if (ip+4 > limit)
{
FT_ERROR(( "T1.Parse_CharStrings : unexpected EOF in integer\n" ));
goto Syntax_Error;
}
*top++ = ((long)ip[0] << 24) |
((long)ip[1] << 16) |
((long)ip[2] << 8) |
ip[3];
ip += 4;
}
break;
default:
{
T1_Long v, v2;
v = ip[-1];
if (v < 32)
{
FT_ERROR(( "T1.Parse_CharStrings : invalid byte (%d)\n",
ip[-1] ));
goto Syntax_Error;
}
/* compute value ---- */
/* */
if (v < 247) /* 1-byte value */
v -= 139;
else
{
if (++ip > limit) /* 2-bytes value, check limits */
{
FT_ERROR(( "T1.Parse_CharStrings : unexpected EOF in integer\n" ));
goto Syntax_Error;
}
v2 = ip[-1] + 108;
if (v < 251)
v = ((v-247) << 8) + v2;
else
v = -(((v-251) << 8) + v2);
}
/* store value - is there enough room ?*/
if ( top >= decoder->stack + T1_MAX_CHARSTRINGS_OPERANDS )
{
FT_ERROR(( "T1.Parse_CharStrings : Stack overflow !!\n" ));
goto Syntax_Error;
}
*top++ = v;
decoder->top = top;
}
} /* big switch */
} /* while ip < limit */
return error;
Syntax_Error:
return T1_Err_Syntax_Error;
Stack_Underflow:
return T1_Err_Stack_Underflow;
Memory_Error:
return builder->error;
}
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
/********** *********/
/********** *********/
/********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/
/********** *********/
/********** The following code is in charge of computing *********/
/********** the maximum advance width of the font. It *********/
/********** quickly process each glyph charstring to *********/
/********** extract the value from either a "sbw" or "seac" *********/
/********** operator. *********/
/********** *********/
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
LOCAL_FUNC
T1_Error T1_Compute_Max_Advance( T1_Face face,
T1_Int *max_advance )
{
T1_Error error;
T1_Decoder decoder;
T1_Int glyph_index;
T1_Font* type1 = &face->type1;
*max_advance = 0;
/* Initialise load decoder */
T1_Init_Decoder( &decoder );
T1_Init_Builder( &decoder.builder, face, 0, 0 );
decoder.builder.metrics_only = 1;
decoder.builder.load_points = 0;
/* For each glyph, parse the glyph charstring and extract */
/* the advance width.. */
for ( glyph_index = 0; glyph_index < type1->num_glyphs; glyph_index++ )
{
/* now get load the unscaled outline */
error = T1_Parse_CharStrings( &decoder,
type1->charstrings [glyph_index],
type1->charstrings_len[glyph_index],
type1->num_subrs,
type1->subrs,
type1->subrs_len );
/* ignore the error if one occured - skip to next glyph */
(void)error;
}
*max_advance = decoder.builder.advance.x;
return T1_Err_Ok;
}
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
/********** *********/
/********** *********/
/********** UNHINTED GLYPH LOADER *********/
/********** *********/
/********** The following code is in charge of loading a *********/
/********** single outline. It completely ignores hinting *********/
/********** and is used when FT_LOAD_NO_HINTING is set. *********/
/********** *********/
/**********************************************************************/
/**********************************************************************/
/**********************************************************************/
LOCAL_FUNC
T1_Error T1_Load_Glyph( T1_GlyphSlot glyph,
T1_Size size,
T1_Int glyph_index,
T1_Int load_flags )
{
T1_Error error;
T1_Decoder decoder;
T1_Face face = (T1_Face)glyph->root.face;
T1_Bool hinting;
T1_Font* type1 = &face->type1;
glyph->x_scale = size->root.metrics.x_scale;
glyph->y_scale = size->root.metrics.y_scale;
glyph->root.outline.n_points = 0;
glyph->root.outline.n_contours = 0;
hinting = ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
( load_flags & FT_LOAD_NO_HINTING ) == 0;
glyph->root.format = ft_glyph_format_none;
{
T1_Init_Decoder( &decoder );
T1_Init_Builder( &decoder.builder, face, size, glyph );
/* now load the unscaled outline */
error = T1_Parse_CharStrings( &decoder,
type1->charstrings [glyph_index],
type1->charstrings_len[glyph_index],
type1->num_subrs,
type1->subrs,
type1->subrs_len );
/* save new glyph tables */
T1_Done_Builder( &decoder.builder );
}
/* Now, set the metrics.. - this is rather simple, as : */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax.. */
if (!error)
{
FT_BBox cbox;
FT_Glyph_Metrics* metrics = &glyph->root.metrics;
FT_Get_Outline_CBox( &glyph->root.outline, &cbox );
/* grid fit the bounding box if necessary */
if (hinting)
{
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = ( cbox.xMax+63 ) & -64;
cbox.yMax = ( cbox.yMax+63 ) & -64;
}
metrics->width = cbox.xMax - cbox.xMin;
metrics->height = cbox.yMax - cbox.yMin;
metrics->horiBearingX = cbox.xMin;
metrics->horiBearingY = cbox.yMax;
/* copy the _unscaled_ advance width */
metrics->horiAdvance = decoder.builder.advance.x;
/* make up vertical metrics */
metrics->vertBearingX = 0;
metrics->vertBearingY = 0;
metrics->vertAdvance = 0;
glyph->root.format = ft_glyph_format_outline;
glyph->root.outline.second_pass = TRUE;
glyph->root.outline.high_precision = ( size->root.metrics.y_ppem < 24 );
glyph->root.outline.dropout_mode = 2;
if ( (load_flags & FT_LOAD_NO_SCALE) == 0 )
{
/* scale the outline and the metrics */
T1_Int n;
FT_Outline* cur = &decoder.builder.base;
T1_Vector* vec = cur->points;
T1_Fixed x_scale = glyph->x_scale;
T1_Fixed y_scale = glyph->y_scale;
/* First of all, scale the points */
for ( n = cur->n_points; n > 0; n--, vec++ )
{
vec->x = FT_MulFix( vec->x, x_scale );
vec->y = FT_MulFix( vec->y, y_scale );
}
/* Then scale the metrics */
metrics->width = FT_MulFix( metrics->width, x_scale );
metrics->height = FT_MulFix( metrics->height, y_scale );
metrics->horiBearingX = FT_MulFix( metrics->horiBearingX, x_scale );
metrics->horiBearingY = FT_MulFix( metrics->horiBearingY, y_scale );
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );
metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, x_scale );
}
}
return error;
}