Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 606 insertions, 0 deletions

diff --git a/modules/freetype2/src/type1/t1gload.c b/modules/freetype2/src/type1/t1gload.c
new file mode 100644
index 0000000000..a32a4649d6
--- /dev/null
+++ b/modules/freetype2/src/type1/t1gload.c
@@ -0,0 +1,606 @@
+/****************************************************************************
+ *
+ * t1gload.c
+ *
+ *   Type 1 Glyph Loader (body).
+ *
+ * Copyright (C) 1996-2023 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 <freetype/internal/ftcalc.h>
+#include <freetype/internal/ftdebug.h>
+#include <freetype/internal/ftstream.h>
+#include <freetype/ftoutln.h>
+#include <freetype/internal/psaux.h>
+#include <freetype/internal/cfftypes.h>
+#include <freetype/ftdriver.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  t1gload
+
+
+  static FT_Error
+  T1_Parse_Glyph_And_Get_Char_String( T1_Decoder  decoder,
+                                      FT_UInt     glyph_index,
+                                      FT_Data*    char_string,
+                                      FT_Bool*    force_scaling )
+  {
+    T1_Face   face  = (T1_Face)decoder->builder.face;
+    T1_Font   type1 = &face->type1;
+    FT_Error  error = FT_Err_Ok;
+
+    PSAux_Service           psaux         = (PSAux_Service)face->psaux;
+    const T1_Decoder_Funcs  decoder_funcs = psaux->t1_decoder_funcs;
+    PS_Decoder              psdecoder;
+
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+    FT_Incremental_InterfaceRec *inc =
+                      face->root.internal->incremental_interface;
+#endif
+
+#ifdef T1_CONFIG_OPTION_OLD_ENGINE
+    PS_Driver  driver = (PS_Driver)FT_FACE_DRIVER( face );
+#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  = type1->charstrings_len[glyph_index];
+    }
+
+    if ( !error )
+    {
+      /* choose which renderer to use */
+#ifdef T1_CONFIG_OPTION_OLD_ENGINE
+      if ( driver->hinting_engine == FT_HINTING_FREETYPE ||
+           decoder->builder.metrics_only                 )
+        error = decoder_funcs->parse_charstrings_old(
+                  decoder,
+                  (FT_Byte*)char_string->pointer,
+                  (FT_UInt)char_string->length );
+#else
+      if ( decoder->builder.metrics_only )
+        error = decoder_funcs->parse_metrics(
+                  decoder,
+                  (FT_Byte*)char_string->pointer,
+                  (FT_UInt)char_string->length );
+#endif
+      else
+      {
+        CFF_SubFontRec  subfont;
+
+
+        psaux->ps_decoder_init( &psdecoder, decoder, TRUE );
+
+        psaux->t1_make_subfont( FT_FACE( face ),
+                                &face->type1.private_dict, &subfont );
+        psdecoder.current_subfont = &subfont;
+
+        error = decoder_funcs->parse_charstrings(
+                  &psdecoder,
+                  (FT_Byte*)char_string->pointer,
+                  (FT_ULong)char_string->length );
+
+        /* Adobe's engine uses 16.16 numbers everywhere;              */
+        /* as a consequence, glyphs larger than 2000ppem get rejected */
+        if ( FT_ERR_EQ( error, Glyph_Too_Big ) )
+        {
+          /* this time, we retry unhinted and scale up the glyph later on */
+          /* (the engine uses and sets the hardcoded value 0x10000 / 64 = */
+          /* 0x400 for both `x_scale' and `y_scale' in this case)         */
+          ((T1_GlyphSlot)decoder->builder.glyph)->hint = FALSE;
+
+          *force_scaling = TRUE;
+
+          error = decoder_funcs->parse_charstrings(
+                    &psdecoder,
+                    (FT_Byte*)char_string->pointer,
+                    (FT_ULong)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_Bool   force_scaling = FALSE;
+    FT_Error  error         = T1_Parse_Glyph_And_Get_Char_String(
+                                decoder, glyph_index, &glyph_data,
+                                &force_scaling );
+
+
+#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;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*************************************************************************/
+  /**********                                                      *********/
+  /**********            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_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.subrs_hash    = type1->subrs_hash;
+
+    decoder.buildchar     = face->buildchar;
+    decoder.len_buildchar = face->len_buildchar;
+
+    *max_advance = 0;
+
+    FT_TRACE6(( "T1_Compute_Max_Advance:\n" ));
+
+    /* 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 */
+    }
+
+    FT_TRACE6(( "T1_Compute_Max_Advance: max advance: %f\n",
+                (double)*max_advance / 65536 ));
+
+    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;
+
+
+    FT_TRACE5(( "T1_Get_Advances:\n" ));
+
+    if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
+    {
+      for ( nn = 0; nn < count; nn++ )
+      {
+        advances[nn] = 0;
+
+        FT_TRACE5(( "  idx %d: advance height 0 font units\n",
+                    first + nn ));
+      }
+
+      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.subrs_hash = type1->subrs_hash;
+
+    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;
+
+      FT_TRACE5(( "  idx %d: advance width %ld font unit%s\n",
+                  first + nn,
+                  advances[nn],
+                  advances[nn] == 1 ? "" : "s" ));
+    }
+
+    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;
+    FT_Bool                 scaled;
+    FT_Bool                 force_scaling = FALSE;
+    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   ) &&
+                       !( load_flags & FT_LOAD_NO_HINTING ) );
+    scaled  = FT_BOOL( !( load_flags & FT_LOAD_NO_SCALE   ) );
+
+    glyph->hint     = hinting;
+    glyph->scaled   = scaled;
+    t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
+
+    error = decoder_funcs->init( &decoder,
+                                 t1glyph->face,
+                                 t1size,
+                                 t1glyph,
+                                 (FT_Byte**)type1->glyph_names,
+                                 face->blend,
+                                 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 );
+
+    decoder.num_subrs     = type1->num_subrs;
+    decoder.subrs         = type1->subrs;
+    decoder.subrs_len     = type1->subrs_len;
+    decoder.subrs_hash    = type1->subrs_hash;
+
+    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,
+                                                &force_scaling );
+    if ( error )
+      goto Exit;
+#ifdef FT_CONFIG_OPTION_INCREMENTAL
+    glyph_data_loaded = 1;
+#endif
+
+    hinting     = glyph->hint;
+    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 || force_scaling )
+        {
+          /* 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 */