initial commit

1 files changed, 615 insertions, 0 deletions

diff --git a/src/freetype/t1objs.c b/src/freetype/t1objs.c
new file mode 100644
index 0000000..995d098
--- /dev/null
+++ b/src/freetype/t1objs.c
@@ -0,0 +1,615 @@
+/***************************************************************************/
+/*                                                                         */
+/*  t1objs.c                                                               */
+/*                                                                         */
+/*    Type 1 objects manager (body).                                       */
+/*                                                                         */
+/*  Copyright 1996-2018 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 FT_INTERNAL_CALC_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_TRUETYPE_IDS_H
+#include FT_DRIVER_H
+
+#include "t1gload.h"
+#include "t1load.h"
+
+#include "t1errors.h"
+
+#include FT_SERVICE_POSTSCRIPT_CMAPS_H
+#include FT_INTERNAL_POSTSCRIPT_AUX_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_t1objs
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /*                            SIZE FUNCTIONS                             */
+  /*                                                                       */
+  /*************************************************************************/
+
+
+  static PSH_Globals_Funcs
+  T1_Size_Get_Globals_Funcs( T1_Size  size )
+  {
+    T1_Face           face     = (T1_Face)size->root.face;
+    PSHinter_Service  pshinter = (PSHinter_Service)face->pshinter;
+    FT_Module         module;
+
+
+    module = FT_Get_Module( size->root.face->driver->root.library,
+                            "pshinter" );
+    return ( module && pshinter && pshinter->get_globals_funcs )
+           ? pshinter->get_globals_funcs( module )
+           : 0;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  T1_Size_Done( FT_Size  t1size )          /* T1_Size */
+  {
+    T1_Size  size = (T1_Size)t1size;
+
+
+    if ( t1size->internal->module_data )
+    {
+      PSH_Globals_Funcs  funcs;
+
+
+      funcs = T1_Size_Get_Globals_Funcs( size );
+      if ( funcs )
+        funcs->destroy( (PSH_Globals)t1size->internal->module_data );
+
+      t1size->internal->module_data = NULL;
+    }
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  T1_Size_Init( FT_Size  t1size )      /* T1_Size */
+  {
+    T1_Size            size  = (T1_Size)t1size;
+    FT_Error           error = FT_Err_Ok;
+    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
+
+
+    if ( funcs )
+    {
+      PSH_Globals  globals;
+      T1_Face      face = (T1_Face)size->root.face;
+
+
+      error = funcs->create( size->root.face->memory,
+                             &face->type1.private_dict, &globals );
+      if ( !error )
+        t1size->internal->module_data = globals;
+    }
+
+    return error;
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  T1_Size_Request( FT_Size          t1size,     /* T1_Size */
+                   FT_Size_Request  req )
+  {
+    T1_Size            size  = (T1_Size)t1size;
+    PSH_Globals_Funcs  funcs = T1_Size_Get_Globals_Funcs( size );
+
+
+    FT_Request_Metrics( size->root.face, req );
+
+    if ( funcs )
+      funcs->set_scale( (PSH_Globals)t1size->internal->module_data,
+                        size->root.metrics.x_scale,
+                        size->root.metrics.y_scale,
+                        0, 0 );
+
+    return FT_Err_Ok;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /*                            SLOT  FUNCTIONS                            */
+  /*                                                                       */
+  /*************************************************************************/
+
+  FT_LOCAL_DEF( void )
+  T1_GlyphSlot_Done( FT_GlyphSlot  slot )
+  {
+    slot->internal->glyph_hints = NULL;
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  T1_GlyphSlot_Init( FT_GlyphSlot  slot )
+  {
+    T1_Face           face;
+    PSHinter_Service  pshinter;
+
+
+    face     = (T1_Face)slot->face;
+    pshinter = (PSHinter_Service)face->pshinter;
+
+    if ( pshinter )
+    {
+      FT_Module  module;
+
+
+      module = FT_Get_Module( slot->face->driver->root.library,
+                              "pshinter" );
+      if ( module )
+      {
+        T1_Hints_Funcs  funcs;
+
+
+        funcs = pshinter->get_t1_funcs( module );
+        slot->internal->glyph_hints = (void*)funcs;
+      }
+    }
+
+    return 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /*                            FACE  FUNCTIONS                            */
+  /*                                                                       */
+  /*************************************************************************/
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    T1_Face_Done                                                       */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The face object destructor.                                        */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    face :: A typeless pointer to the face object to destroy.          */
+  /*                                                                       */
+  FT_LOCAL_DEF( void )
+  T1_Face_Done( FT_Face  t1face )         /* T1_Face */
+  {
+    T1_Face    face = (T1_Face)t1face;
+    FT_Memory  memory;
+    T1_Font    type1;
+
+
+    if ( !face )
+      return;
+
+    memory = face->root.memory;
+    type1  = &face->type1;
+
+    /* release font info strings */
+    {
+      PS_FontInfo  info = &type1->font_info;
+
+
+      FT_FREE( info->version );
+      FT_FREE( info->notice );
+      FT_FREE( info->full_name );
+      FT_FREE( info->family_name );
+      FT_FREE( info->weight );
+    }
+
+    /* release top dictionary */
+    FT_FREE( type1->charstrings_len );
+    FT_FREE( type1->charstrings );
+    FT_FREE( type1->glyph_names );
+
+    FT_FREE( type1->subrs );
+    FT_FREE( type1->subrs_len );
+
+    ft_hash_num_free( type1->subrs_hash, memory );
+    FT_FREE( type1->subrs_hash );
+
+    FT_FREE( type1->subrs_block );
+    FT_FREE( type1->charstrings_block );
+    FT_FREE( type1->glyph_names_block );
+
+    FT_FREE( type1->encoding.char_index );
+    FT_FREE( type1->encoding.char_name );
+    FT_FREE( type1->font_name );
+
+    /* release unicode map, if any */
+#if 0
+    FT_FREE( face->unicode_map_rec.maps );
+    face->unicode_map_rec.num_maps = 0;
+    face->unicode_map              = NULL;
+#endif
+
+    face->root.family_name = NULL;
+    face->root.style_name  = NULL;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    T1_Face_Init                                                       */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    The face object constructor.                                       */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    stream     ::  input stream where to load font data.               */
+  /*                                                                       */
+  /*    face_index :: The index of the font face in the resource.          */
+  /*                                                                       */
+  /*    num_params :: Number of additional generic parameters.  Ignored.   */
+  /*                                                                       */
+  /*    params     :: Additional generic parameters.  Ignored.             */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    face       :: The face record to build.                            */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    FreeType error code.  0 means success.                             */
+  /*                                                                       */
+  FT_LOCAL_DEF( FT_Error )
+  T1_Face_Init( FT_Stream      stream,
+                FT_Face        t1face,          /* T1_Face */
+                FT_Int         face_index,
+                FT_Int         num_params,
+                FT_Parameter*  params )
+  {
+    T1_Face             face = (T1_Face)t1face;
+    FT_Error            error;
+    FT_Service_PsCMaps  psnames;
+    PSAux_Service       psaux;
+    T1_Font             type1 = &face->type1;
+    PS_FontInfo         info = &type1->font_info;
+
+    FT_UNUSED( num_params );
+    FT_UNUSED( params );
+    FT_UNUSED( stream );
+
+
+    face->root.num_faces = 1;
+
+    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
+    face->psnames = psnames;
+
+    face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
+                                           "psaux" );
+    psaux = (PSAux_Service)face->psaux;
+    if ( !psaux )
+    {
+      FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" ));
+      error = FT_THROW( Missing_Module );
+      goto Exit;
+    }
+
+    face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
+                                              "pshinter" );
+
+    FT_TRACE2(( "Type 1 driver\n" ));
+
+    /* open the tokenizer; this will also check the font format */
+    error = T1_Open_Face( face );
+    if ( error )
+      goto Exit;
+
+    /* if we just wanted to check the format, leave successfully now */
+    if ( face_index < 0 )
+      goto Exit;
+
+    /* check the face index */
+    if ( ( face_index & 0xFFFF ) > 0 )
+    {
+      FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
+      error = FT_THROW( Invalid_Argument );
+      goto Exit;
+    }
+
+    /* now load the font program into the face object */
+
+    /* initialize the face object fields */
+
+    /* set up root face fields */
+    {
+      FT_Face  root = (FT_Face)&face->root;
+
+
+      root->num_glyphs = type1->num_glyphs;
+      root->face_index = 0;
+
+      root->face_flags |= FT_FACE_FLAG_SCALABLE    |
+                          FT_FACE_FLAG_HORIZONTAL  |
+                          FT_FACE_FLAG_GLYPH_NAMES |
+                          FT_FACE_FLAG_HINTER;
+
+      if ( info->is_fixed_pitch )
+        root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
+
+      if ( face->blend )
+        root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;
+
+      /* The following code to extract the family and the style is very   */
+      /* simplistic and might get some things wrong.  For a full-featured */
+      /* algorithm you might have a look at the whitepaper given at       */
+      /*                                                                  */
+      /*   https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */
+
+      /* get style name -- be careful, some broken fonts only */
+      /* have a `/FontName' dictionary entry!                 */
+      root->family_name = info->family_name;
+      root->style_name  = NULL;
+
+      if ( root->family_name )
+      {
+        char*  full   = info->full_name;
+        char*  family = root->family_name;
+
+
+        if ( full )
+        {
+          FT_Bool  the_same = TRUE;
+
+
+          while ( *full )
+          {
+            if ( *full == *family )
+            {
+              family++;
+              full++;
+            }
+            else
+            {
+              if ( *full == ' ' || *full == '-' )
+                full++;
+              else if ( *family == ' ' || *family == '-' )
+                family++;
+              else
+              {
+                the_same = FALSE;
+
+                if ( !*family )
+                  root->style_name = full;
+                break;
+              }
+            }
+          }
+
+          if ( the_same )
+            root->style_name = (char *)"Regular";
+        }
+      }
+      else
+      {
+        /* do we have a `/FontName'? */
+        if ( type1->font_name )
+          root->family_name = type1->font_name;
+      }
+
+      if ( !root->style_name )
+      {
+        if ( info->weight )
+          root->style_name = info->weight;
+        else
+          /* assume `Regular' style because we don't know better */
+          root->style_name = (char *)"Regular";
+      }
+
+      /* compute style flags */
+      root->style_flags = 0;
+      if ( info->italic_angle )
+        root->style_flags |= FT_STYLE_FLAG_ITALIC;
+      if ( info->weight )
+      {
+        if ( !ft_strcmp( info->weight, "Bold"  ) ||
+             !ft_strcmp( info->weight, "Black" ) )
+          root->style_flags |= FT_STYLE_FLAG_BOLD;
+      }
+
+      /* no embedded bitmap support */
+      root->num_fixed_sizes = 0;
+      root->available_sizes = NULL;
+
+      root->bbox.xMin =   type1->font_bbox.xMin            >> 16;
+      root->bbox.yMin =   type1->font_bbox.yMin            >> 16;
+      /* no `U' suffix here to 0xFFFF! */
+      root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16;
+      root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16;
+
+      /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */
+      if ( !root->units_per_EM )
+        root->units_per_EM = 1000;
+
+      root->ascender  = (FT_Short)( root->bbox.yMax );
+      root->descender = (FT_Short)( root->bbox.yMin );
+
+      root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 );
+      if ( root->height < root->ascender - root->descender )
+        root->height = (FT_Short)( root->ascender - root->descender );
+
+      /* now compute the maximum advance width */
+      root->max_advance_width =
+        (FT_Short)( root->bbox.xMax );
+      {
+        FT_Pos  max_advance;
+
+
+        error = T1_Compute_Max_Advance( face, &max_advance );
+
+        /* in case of error, keep the standard width */
+        if ( !error )
+          root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance );
+        else
+          error = FT_Err_Ok;   /* clear error */
+      }
+
+      root->max_advance_height = root->height;
+
+      root->underline_position  = (FT_Short)info->underline_position;
+      root->underline_thickness = (FT_Short)info->underline_thickness;
+    }
+
+    {
+      FT_Face  root = &face->root;
+
+
+      if ( psnames )
+      {
+        FT_CharMapRec    charmap;
+        T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
+        FT_CMap_Class    clazz;
+
+
+        charmap.face = root;
+
+        /* first of all, try to synthesize a Unicode charmap */
+        charmap.platform_id = TT_PLATFORM_MICROSOFT;
+        charmap.encoding_id = TT_MS_ID_UNICODE_CS;
+        charmap.encoding    = FT_ENCODING_UNICODE;
+
+        error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
+        if ( error                                      &&
+             FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
+          goto Exit;
+        error = FT_Err_Ok;
+
+        /* now, generate an Adobe Standard encoding when appropriate */
+        charmap.platform_id = TT_PLATFORM_ADOBE;
+        clazz               = NULL;
+
+        switch ( type1->encoding_type )
+        {
+        case T1_ENCODING_TYPE_STANDARD:
+          charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
+          charmap.encoding_id = TT_ADOBE_ID_STANDARD;
+          clazz               = cmap_classes->standard;
+          break;
+
+        case T1_ENCODING_TYPE_EXPERT:
+          charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
+          charmap.encoding_id = TT_ADOBE_ID_EXPERT;
+          clazz               = cmap_classes->expert;
+          break;
+
+        case T1_ENCODING_TYPE_ARRAY:
+          charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
+          charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
+          clazz               = cmap_classes->custom;
+          break;
+
+        case T1_ENCODING_TYPE_ISOLATIN1:
+          charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
+          charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
+          clazz               = cmap_classes->unicode;
+          break;
+
+        default:
+          ;
+        }
+
+        if ( clazz )
+          error = FT_CMap_New( clazz, NULL, &charmap, NULL );
+      }
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    T1_Driver_Init                                                     */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Initializes a given Type 1 driver object.                          */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    driver :: A handle to the target driver object.                    */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    FreeType error code.  0 means success.                             */
+  /*                                                                       */
+  FT_LOCAL_DEF( FT_Error )
+  T1_Driver_Init( FT_Module  module )
+  {
+    PS_Driver  driver = (PS_Driver)module;
+
+    FT_UInt32  seed;
+
+
+    /* set default property values, cf. `ftt1drv.h' */
+#ifdef T1_CONFIG_OPTION_OLD_ENGINE
+    driver->hinting_engine = FT_HINTING_FREETYPE;
+#else
+    driver->hinting_engine = FT_HINTING_ADOBE;
+#endif
+
+    driver->no_stem_darkening = TRUE;
+
+    driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
+    driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1;
+    driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2;
+    driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2;
+    driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3;
+    driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3;
+    driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4;
+    driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4;
+
+    /* compute random seed from some memory addresses */
+    seed = (FT_UInt32)( (FT_Offset)(char*)&seed          ^
+                        (FT_Offset)(char*)&module        ^
+                        (FT_Offset)(char*)module->memory );
+    seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 );
+
+    driver->random_seed = (FT_Int32)seed;
+    if ( driver->random_seed < 0 )
+      driver->random_seed = -driver->random_seed;
+    else if ( driver->random_seed == 0 )
+      driver->random_seed = 123456789;
+
+    return FT_Err_Ok;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    T1_Driver_Done                                                     */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Finalizes a given Type 1 driver.                                   */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    driver :: A handle to the target Type 1 driver.                    */
+  /*                                                                       */
+  FT_LOCAL_DEF( void )
+  T1_Driver_Done( FT_Module  driver )
+  {
+    FT_UNUSED( driver );
+  }
+
+
+/* END */