Work around a behaviour change in freetype > 2.8

Freetype will throw an error when we try to retrieve the glyph if the x/y
advance values are too big to fit in a 16.16 fixed point value.

Since we have no need of those values, set them to zero, and avoid the error.

Bring freetype up to 2.9.1

Plus the gs makefile changes to support the new version.

Reapply "Work around a change in the zlib API for 1.2.11"

for Freetype
commit: 08482c582115a1396d0fd9186011008f889a61c5

1 files changed, 42 insertions, 8 deletions

diff --git a/freetype/src/cid/cidobjs.c b/freetype/src/cid/cidobjs.c
index 2d2600fd4..77afe1c87 100644
--- a/freetype/src/cid/cidobjs.c
+++ b/freetype/src/cid/cidobjs.c
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    CID objects manager (body).                                          */
 /*                                                                         */
-/*  Copyright 1996-2016 by                                                 */
+/*  Copyright 1996-2018 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -26,6 +26,7 @@
 #include FT_SERVICE_POSTSCRIPT_CMAPS_H
 #include FT_INTERNAL_POSTSCRIPT_AUX_H
 #include FT_INTERNAL_POSTSCRIPT_HINTS_H
+#include FT_DRIVER_H
 
 #include "ciderrs.h"
 
@@ -113,16 +114,16 @@
     CID_Size  size = (CID_Size)cidsize;
 
 
-    if ( cidsize->internal )
+    if ( cidsize->internal->module_data )
     {
       PSH_Globals_Funcs  funcs;
 
 
       funcs = cid_size_get_globals_funcs( size );
       if ( funcs )
-        funcs->destroy( (PSH_Globals)cidsize->internal );
+        funcs->destroy( (PSH_Globals)cidsize->internal->module_data );
 
-      cidsize->internal = NULL;
+      cidsize->internal->module_data = NULL;
     }
   }
 
@@ -145,7 +146,7 @@
 
       error = funcs->create( cidsize->face->memory, priv, &globals );
       if ( !error )
-        cidsize->internal = (FT_Size_Internal)(void*)globals;
+        cidsize->internal->module_data = globals;
     }
 
     return error;
@@ -164,7 +165,7 @@
     funcs = cid_size_get_globals_funcs( (CID_Size)size );
 
     if ( funcs )
-      funcs->set_scale( (PSH_Globals)size->internal,
+      funcs->set_scale( (PSH_Globals)size->internal->module_data,
                         size->metrics.x_scale,
                         size->metrics.y_scale,
                         0, 0 );
@@ -463,9 +464,42 @@
   /*    FreeType error code.  0 means success.                             */
   /*                                                                       */
   FT_LOCAL_DEF( FT_Error )
-  cid_driver_init( FT_Module  driver )
+  cid_driver_init( FT_Module  module )
   {
-    FT_UNUSED( driver );
+    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;
   }