Use the new engine.

* src/cid/cidgload.c: Update includes.
(cid_load_glyph, cid_slot_load_glyph): Implement changes to glyph
loading code as with `type1' module.

ChangeLog

@@ -1,3 +1,11 @@
+2017-09-25  Ewald Hew  <ewaldhew@gmail.com>
+
+	[cid] Use the new engine.
+
+	* src/cid/cidgload.c: Update includes.
+	(cid_load_glyph, cid_slot_load_glyph): Implement changes to glyph
+	loading code as with `type1' module.
+
 2017-09-25  Ewald Hew  <ewaldhew@gmail.com>
 
 	[cid] Add Adobe engine configuration.

src/cid/cidgload.c

@@ -24,6 +24,10 @@
 #include FT_OUTLINE_H
 #include FT_INTERNAL_CALC_H
 
+#include FT_INTERNAL_POSTSCRIPT_AUX_H
+#include FT_INTERNAL_CFF_TYPES_H
+#include FT_TYPE1_DRIVER_H
+
 #include "ciderrs.h"
 
 
@@ -52,6 +56,8 @@
     FT_ULong       glyph_length = 0;
     PSAux_Service  psaux        = (PSAux_Service)face->psaux;
 
+    FT_Bool        force_scaling = FALSE;
+
 #ifdef FT_CONFIG_OPTION_INCREMENTAL
     FT_Incremental_InterfaceRec *inc =
                                   face->root.internal->incremental_interface;
@@ -169,9 +175,43 @@
       if ( decoder->lenIV >= 0 )
         psaux->t1_decrypt( charstring, glyph_length, 4330 );
 
-      error = decoder->funcs.parse_charstrings_old(
-                decoder, charstring + cs_offset,
-                glyph_length - cs_offset );
+      /* choose which renderer to use */
+      if ( ((PS_Driver)FT_FACE_DRIVER( face ))->hinting_engine == FT_T1_HINTING_FREETYPE ||
+           decoder->builder.metrics_only )
+        error = psaux->t1_decoder_funcs->parse_charstrings_old( decoder,
+                                                                charstring + cs_offset,
+                                                                glyph_length - cs_offset );
+      else
+      {
+        PS_Decoder      psdecoder;
+        CFF_SubFontRec  subfont;
+
+
+        psaux->ps_decoder_init( decoder, TRUE, &psdecoder );
+
+        psaux->t1_make_subfont( FT_FACE( face ), &dict->private_dict, &subfont );
+        psdecoder.current_subfont = &subfont;
+
+        error = psaux->t1_decoder_funcs->parse_charstrings( &psdecoder,
+                                                            charstring + cs_offset,
+                                                            glyph_length - cs_offset );
+
+        /* 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)         */
+          ((CID_GlyphSlot)decoder->builder.glyph)->hint = FALSE;
+
+          force_scaling = TRUE;
+
+          error = psaux->t1_decoder_funcs->parse_charstrings( &psdecoder,
+                                                              charstring + cs_offset,
+                                                              glyph_length - cs_offset );
+        }
+      }
     }
 
 #ifdef FT_CONFIG_OPTION_INCREMENTAL
@@ -200,6 +240,8 @@
   Exit:
     FT_FREE( charstring );
 
+    ((CID_GlyphSlot)decoder->builder.glyph)->scaled = force_scaling;
+
     return error;
   }
 
@@ -288,6 +330,7 @@
     T1_DecoderRec  decoder;
     CID_Face       face = (CID_Face)cidglyph->face;
     FT_Bool        hinting;
+    FT_Bool        scaled;
 
     PSAux_Service  psaux = (PSAux_Service)face->psaux;
     FT_Matrix      font_matrix;
@@ -311,7 +354,10 @@
 
     hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&
                        ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
+    scaled  = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 );
 
+    glyph->hint      = hinting;
+    glyph->scaled    = scaled;
     cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;
 
     error = psaux->t1_decoder_funcs->init( &decoder,
@@ -337,6 +383,9 @@
     if ( error )
       goto Exit;
 
+    hinting     = glyph->hint;
+    scaled      = glyph->scaled;
+
     font_matrix = decoder.font_matrix;
     font_offset = decoder.font_offset;
 
@@ -410,7 +459,7 @@
         metrics->vertAdvance += font_offset.y;
       }
 
-      if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
+      if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || scaled )
       {
         /* scale the outline and the metrics */
         FT_Int       n;