/***************************************************************************//*                                                                         *//*  t1gload.c                                                              *//*                                                                         *//*    Type 1 Glyph Loader (body).                                          *//*                                                                         *//*  Copyright 1996-2001, 2002 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_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.                                         *********/  /**********                                                      *********/  /*************************************************************************/  /*************************************************************************/  /*************************************************************************/  FT_CALLBACK_DEF( FT_Error )  T1_Parse_Glyph( T1_Decoder  decoder,                  FT_UInt     glyph_index )  {    T1_Face  face  = (T1_Face)decoder->builder.face;    T1_Font  type1 = &face->type1;    decoder->font_matrix = type1->font_matrix;    decoder->font_offset = type1->font_offset;    return decoder->funcs.parse_charstrings(                      decoder,                      type1->charstrings    [glyph_index],                      type1->charstrings_len[glyph_index] );  }  FT_LOCAL_DEF( FT_Error )  T1_Compute_Max_Advance( T1_Face  face,                          FT_Int*  max_advance )  {    FT_Error       error;    T1_DecoderRec  decoder;    FT_Int         glyph_index;    T1_Font        type1 = &face->type1;    PSAux_Service  psaux = (PSAux_Service)face->psaux;    *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,                                           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;    *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 */      error = T1_Parse_Glyph( &decoder, glyph_index );      if ( glyph_index == 0 || decoder.builder.advance.x > *max_advance )        *max_advance = decoder.builder.advance.x;              /* ignore the error if one occured - skip to next glyph */    }    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.       *********/  /**********                                                      *********/  /**********      The Type 1 hinter is located in `t1hint.c'      *********/  /**********                                                      *********/  /*************************************************************************/  /*************************************************************************/  /*************************************************************************/  FT_LOCAL_DEF( FT_Error )  T1_Load_Glyph( T1_GlyphSlot  glyph,                 T1_Size       size,                 FT_UInt       glyph_index,                 FT_Int        load_flags )  {    FT_Error                error;    T1_DecoderRec           decoder;    T1_Face                 face = (T1_Face)glyph->root.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;    if ( load_flags & FT_LOAD_NO_RECURSE )      load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;    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 = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&                       ( load_flags & FT_LOAD_NO_HINTING ) == 0 );    glyph->root.format = ft_glyph_format_outline;    error = decoder_funcs->init( &decoder,                                 (FT_Face)face,                                 (FT_Size)size,                                 (FT_GlyphSlot)glyph,                                 (FT_Byte**)type1->glyph_names,                                 face->blend,                                 FT_BOOL( hinting ),                                 T1_Parse_Glyph );    if ( error )      goto Exit;    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;    /* now load the unscaled outline */    error = T1_Parse_Glyph( &decoder, glyph_index );    if ( error )      goto Exit;    font_matrix = decoder.font_matrix;    font_offset = decoder.font_offset;    /* save new glyph tables */    decoder_funcs->done( &decoder );    /* 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 )    {      glyph->root.outline.flags &= ft_outline_owner;      glyph->root.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 = glyph->root.internal;        glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;        glyph->root.metrics.horiAdvance  = 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 = &glyph->root.metrics;        /* copy the _unscaled_ advance width */        metrics->horiAdvance                    = decoder.builder.advance.x;        glyph->root.linearHoriAdvance           = decoder.builder.advance.x;        glyph->root.internal->glyph_transformed = 0;        /* make up vertical metrics */        metrics->vertBearingX = 0;        metrics->vertBearingY = 0;        metrics->vertAdvance  = 0;        glyph->root.linearVertAdvance = 0;        glyph->root.format = ft_glyph_format_outline;        if ( size && size->root.metrics.y_ppem < 24 )          glyph->root.outline.flags |= ft_outline_high_precision;#if 1        /* apply the font matrix, if any */        FT_Outline_Transform( &glyph->root.outline, &font_matrix );        FT_Outline_Translate( &glyph->root.outline,                              font_offset.x,                              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 )            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 );            }          FT_Outline_Get_CBox( &glyph->root.outline, &cbox );          /* Then scale the metrics */          metrics->horiAdvance  = FT_MulFix( metrics->horiAdvance,  x_scale );          metrics->vertAdvance  = FT_MulFix( metrics->vertAdvance,  y_scale );          metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );          metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );          if ( hinting )          {            metrics->horiAdvance = ( metrics->horiAdvance + 32 ) & -64;            metrics->vertAdvance = ( metrics->vertAdvance + 32 ) & -64;            metrics->vertBearingX = ( metrics->vertBearingX + 32 ) & -64;            metrics->vertBearingY = ( metrics->vertBearingY + 32 ) & -64;          }        }        /* compute the other metrics */        FT_Outline_Get_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;      }      /* Set control data to the glyph charstrings.  Note that this is */      /* _not_ zero-terminated.                                        */      glyph->root.control_data = type1->charstrings    [glyph_index];      glyph->root.control_len  = type1->charstrings_len[glyph_index];    }  Exit:    return error;  }/* END */