/***************************************************************************/ | |
/* */ | |
/* t1gload.c */ | |
/* */ | |
/* Type 1 Glyph Loader (body). */ | |
/* */ | |
/* Copyright 1996-2015 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 <ft2build.h> | |
#include "t1gload.h" | |
#include FT_INTERNAL_CALC_H | |
#include FT_INTERNAL_DEBUG_H | |
#include FT_INTERNAL_STREAM_H | |
#include FT_OUTLINE_H | |
#include FT_INTERNAL_POSTSCRIPT_AUX_H | |
#include "t1errors.h" | |
/*************************************************************************/ | |
/* */ | |
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */ | |
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ | |
/* messages during execution. */ | |
/* */ | |
#undef FT_COMPONENT | |
#define FT_COMPONENT trace_t1gload | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/********** *********/ | |
/********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/ | |
/********** *********/ | |
/********** The following code is in charge of computing *********/ | |
/********** the maximum advance width of the font. It *********/ | |
/********** quickly processes each glyph charstring to *********/ | |
/********** extract the value from either a `sbw' or `seac' *********/ | |
/********** operator. *********/ | |
/********** *********/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
static FT_Error | |
T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder, | |
FT_UInt glyph_index, | |
FT_Data* char_string ) | |
{ | |
T1_Face face = (T1_Face)decoder->builder.face; | |
T1_Font type1 = &face->type1; | |
FT_Error error = FT_Err_Ok; | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
FT_Incremental_InterfaceRec *inc = | |
face->root.internal->incremental_interface; | |
#endif | |
decoder->font_matrix = type1->font_matrix; | |
decoder->font_offset = type1->font_offset; | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
/* For incremental fonts get the character data using the */ | |
/* callback function. */ | |
if ( inc ) | |
error = inc->funcs->get_glyph_data( inc->object, | |
glyph_index, char_string ); | |
else | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
/* For ordinary fonts get the character data stored in the face record. */ | |
{ | |
char_string->pointer = type1->charstrings[glyph_index]; | |
char_string->length = (FT_Int)type1->charstrings_len[glyph_index]; | |
} | |
if ( !error ) | |
error = decoder->funcs.parse_charstrings( | |
decoder, (FT_Byte*)char_string->pointer, | |
(FT_UInt)char_string->length ); | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
/* Incremental fonts can optionally override the metrics. */ | |
if ( !error && inc && inc->funcs->get_glyph_metrics ) | |
{ | |
FT_Incremental_MetricsRec metrics; | |
metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x ); | |
metrics.bearing_y = 0; | |
metrics.advance = FIXED_TO_INT( decoder->builder.advance.x ); | |
metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y ); | |
error = inc->funcs->get_glyph_metrics( inc->object, | |
glyph_index, FALSE, &metrics ); | |
decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x ); | |
decoder->builder.advance.x = INT_TO_FIXED( metrics.advance ); | |
decoder->builder.advance.y = INT_TO_FIXED( metrics.advance_v ); | |
} | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
return error; | |
} | |
FT_CALLBACK_DEF( FT_Error ) | |
T1_Parse_Glyph( T1_Decoder decoder, | |
FT_UInt glyph_index ) | |
{ | |
FT_Data glyph_data; | |
FT_Error error = T1_Parse_Glyph_And_Get_Char_String( | |
decoder, glyph_index, &glyph_data ); | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
if ( !error ) | |
{ | |
T1_Face face = (T1_Face)decoder->builder.face; | |
if ( face->root.internal->incremental_interface ) | |
face->root.internal->incremental_interface->funcs->free_glyph_data( | |
face->root.internal->incremental_interface->object, | |
&glyph_data ); | |
} | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
return error; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T1_Compute_Max_Advance( T1_Face face, | |
FT_Pos* max_advance ) | |
{ | |
FT_Error error; | |
T1_DecoderRec decoder; | |
FT_Int glyph_index; | |
T1_Font type1 = &face->type1; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); | |
*max_advance = 0; | |
/* initialize load decoder */ | |
error = psaux->t1_decoder_funcs->init( &decoder, | |
(FT_Face)face, | |
0, /* size */ | |
0, /* glyph slot */ | |
(FT_Byte**)type1->glyph_names, | |
face->blend, | |
0, | |
FT_RENDER_MODE_NORMAL, | |
T1_Parse_Glyph ); | |
if ( error ) | |
return error; | |
decoder.builder.metrics_only = 1; | |
decoder.builder.load_points = 0; | |
decoder.num_subrs = type1->num_subrs; | |
decoder.subrs = type1->subrs; | |
decoder.subrs_len = type1->subrs_len; | |
decoder.buildchar = face->buildchar; | |
decoder.len_buildchar = face->len_buildchar; | |
*max_advance = 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 */ | |
(void)T1_Parse_Glyph( &decoder, (FT_UInt)glyph_index ); | |
if ( glyph_index == 0 || decoder.builder.advance.x > *max_advance ) | |
*max_advance = decoder.builder.advance.x; | |
/* ignore the error if one occurred - skip to next glyph */ | |
} | |
psaux->t1_decoder_funcs->done( &decoder ); | |
return FT_Err_Ok; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T1_Get_Advances( FT_Face t1face, /* T1_Face */ | |
FT_UInt first, | |
FT_UInt count, | |
FT_Int32 load_flags, | |
FT_Fixed* advances ) | |
{ | |
T1_Face face = (T1_Face)t1face; | |
T1_DecoderRec decoder; | |
T1_Font type1 = &face->type1; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
FT_UInt nn; | |
FT_Error error; | |
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
{ | |
for ( nn = 0; nn < count; nn++ ) | |
advances[nn] = 0; | |
return FT_Err_Ok; | |
} | |
error = psaux->t1_decoder_funcs->init( &decoder, | |
(FT_Face)face, | |
0, /* size */ | |
0, /* glyph slot */ | |
(FT_Byte**)type1->glyph_names, | |
face->blend, | |
0, | |
FT_RENDER_MODE_NORMAL, | |
T1_Parse_Glyph ); | |
if ( error ) | |
return error; | |
decoder.builder.metrics_only = 1; | |
decoder.builder.load_points = 0; | |
decoder.num_subrs = type1->num_subrs; | |
decoder.subrs = type1->subrs; | |
decoder.subrs_len = type1->subrs_len; | |
decoder.buildchar = face->buildchar; | |
decoder.len_buildchar = face->len_buildchar; | |
for ( nn = 0; nn < count; nn++ ) | |
{ | |
error = T1_Parse_Glyph( &decoder, first + nn ); | |
if ( !error ) | |
advances[nn] = FIXED_TO_INT( decoder.builder.advance.x ); | |
else | |
advances[nn] = 0; | |
} | |
return FT_Err_Ok; | |
} | |
FT_LOCAL_DEF( FT_Error ) | |
T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */ | |
FT_Size t1size, /* T1_Size */ | |
FT_UInt glyph_index, | |
FT_Int32 load_flags ) | |
{ | |
T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph; | |
FT_Error error; | |
T1_DecoderRec decoder; | |
T1_Face face = (T1_Face)t1glyph->face; | |
FT_Bool hinting; | |
T1_Font type1 = &face->type1; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs; | |
FT_Matrix font_matrix; | |
FT_Vector font_offset; | |
FT_Data glyph_data; | |
FT_Bool must_finish_decoder = FALSE; | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
FT_Bool glyph_data_loaded = 0; | |
#endif | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs && | |
!face->root.internal->incremental_interface ) | |
#else | |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
{ | |
error = FT_THROW( Invalid_Argument ); | |
goto Exit; | |
} | |
FT_TRACE1(( "T1_Load_Glyph: glyph index %d\n", glyph_index )); | |
FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); | |
if ( load_flags & FT_LOAD_NO_RECURSE ) | |
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; | |
if ( t1size ) | |
{ | |
glyph->x_scale = t1size->metrics.x_scale; | |
glyph->y_scale = t1size->metrics.y_scale; | |
} | |
else | |
{ | |
glyph->x_scale = 0x10000L; | |
glyph->y_scale = 0x10000L; | |
} | |
t1glyph->outline.n_points = 0; | |
t1glyph->outline.n_contours = 0; | |
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 && | |
( load_flags & FT_LOAD_NO_HINTING ) == 0 ); | |
t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
error = decoder_funcs->init( &decoder, | |
t1glyph->face, | |
t1size, | |
t1glyph, | |
(FT_Byte**)type1->glyph_names, | |
face->blend, | |
FT_BOOL( hinting ), | |
FT_LOAD_TARGET_MODE( load_flags ), | |
T1_Parse_Glyph ); | |
if ( error ) | |
goto Exit; | |
must_finish_decoder = TRUE; | |
decoder.builder.no_recurse = FT_BOOL( | |
( load_flags & FT_LOAD_NO_RECURSE ) != 0 ); | |
decoder.num_subrs = type1->num_subrs; | |
decoder.subrs = type1->subrs; | |
decoder.subrs_len = type1->subrs_len; | |
decoder.buildchar = face->buildchar; | |
decoder.len_buildchar = face->len_buildchar; | |
/* now load the unscaled outline */ | |
error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index, | |
&glyph_data ); | |
if ( error ) | |
goto Exit; | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
glyph_data_loaded = 1; | |
#endif | |
font_matrix = decoder.font_matrix; | |
font_offset = decoder.font_offset; | |
/* save new glyph tables */ | |
decoder_funcs->done( &decoder ); | |
must_finish_decoder = FALSE; | |
/* 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 ) | |
{ | |
t1glyph->outline.flags &= FT_OUTLINE_OWNER; | |
t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL; | |
/* for composite glyphs, return only left side bearing and */ | |
/* advance width */ | |
if ( load_flags & FT_LOAD_NO_RECURSE ) | |
{ | |
FT_Slot_Internal internal = t1glyph->internal; | |
t1glyph->metrics.horiBearingX = | |
FIXED_TO_INT( decoder.builder.left_bearing.x ); | |
t1glyph->metrics.horiAdvance = | |
FIXED_TO_INT( decoder.builder.advance.x ); | |
internal->glyph_matrix = font_matrix; | |
internal->glyph_delta = font_offset; | |
internal->glyph_transformed = 1; | |
} | |
else | |
{ | |
FT_BBox cbox; | |
FT_Glyph_Metrics* metrics = &t1glyph->metrics; | |
/* copy the _unscaled_ advance width */ | |
metrics->horiAdvance = | |
FIXED_TO_INT( decoder.builder.advance.x ); | |
t1glyph->linearHoriAdvance = | |
FIXED_TO_INT( decoder.builder.advance.x ); | |
t1glyph->internal->glyph_transformed = 0; | |
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
{ | |
/* make up vertical ones */ | |
metrics->vertAdvance = ( face->type1.font_bbox.yMax - | |
face->type1.font_bbox.yMin ) >> 16; | |
t1glyph->linearVertAdvance = metrics->vertAdvance; | |
} | |
else | |
{ | |
metrics->vertAdvance = | |
FIXED_TO_INT( decoder.builder.advance.y ); | |
t1glyph->linearVertAdvance = | |
FIXED_TO_INT( decoder.builder.advance.y ); | |
} | |
t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
if ( t1size && t1size->metrics.y_ppem < 24 ) | |
t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; | |
#if 1 | |
/* apply the font matrix, if any */ | |
if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L || | |
font_matrix.xy != 0 || font_matrix.yx != 0 ) | |
{ | |
FT_Outline_Transform( &t1glyph->outline, &font_matrix ); | |
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, | |
font_matrix.xx ); | |
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, | |
font_matrix.yy ); | |
} | |
if ( font_offset.x || font_offset.y ) | |
{ | |
FT_Outline_Translate( &t1glyph->outline, | |
font_offset.x, | |
font_offset.y ); | |
metrics->horiAdvance += font_offset.x; | |
metrics->vertAdvance += font_offset.y; | |
} | |
#endif | |
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 ) | |
{ | |
/* scale the outline and the metrics */ | |
FT_Int n; | |
FT_Outline* cur = decoder.builder.base; | |
FT_Vector* vec = cur->points; | |
FT_Fixed x_scale = glyph->x_scale; | |
FT_Fixed y_scale = glyph->y_scale; | |
/* First of all, scale the points, if we are not hinting */ | |
if ( !hinting || ! decoder.builder.hints_funcs ) | |
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->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); | |
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale ); | |
} | |
/* compute the other metrics */ | |
FT_Outline_Get_CBox( &t1glyph->outline, &cbox ); | |
metrics->width = cbox.xMax - cbox.xMin; | |
metrics->height = cbox.yMax - cbox.yMin; | |
metrics->horiBearingX = cbox.xMin; | |
metrics->horiBearingY = cbox.yMax; | |
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
{ | |
/* make up vertical ones */ | |
ft_synthesize_vertical_metrics( metrics, | |
metrics->vertAdvance ); | |
} | |
} | |
/* Set control data to the glyph charstrings. Note that this is */ | |
/* _not_ zero-terminated. */ | |
t1glyph->control_data = (FT_Byte*)glyph_data.pointer; | |
t1glyph->control_len = glyph_data.length; | |
} | |
Exit: | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
if ( glyph_data_loaded && face->root.internal->incremental_interface ) | |
{ | |
face->root.internal->incremental_interface->funcs->free_glyph_data( | |
face->root.internal->incremental_interface->object, | |
&glyph_data ); | |
/* Set the control data to null - it is no longer available if */ | |
/* loaded incrementally. */ | |
t1glyph->control_data = NULL; | |
t1glyph->control_len = 0; | |
} | |
#endif | |
if ( must_finish_decoder ) | |
decoder_funcs->done( &decoder ); | |
return error; | |
} | |
/* END */ |