[freetype2-demos] ftbench-gsoc-goksu fad8675 15/17: [ftbench] New option `-a` to apply design coordinates.

[Werner Lemberg]

branch: ftbench-gsoc-goksu
commit fad86757fe55a4be5ca363e98d86f0c1a3836cf4
Author: Seigo Nonaka <nona@google.com>
Commit: Werner Lemberg <wl@gnu.org>

    [ftbench] New option `-a` to apply design coordinates.
    
    The performance of MM fonts is quite different in comparison to static
    fonts.  To be able to get benchmarks for the former, add a new command-line
    option to pass design coordinates.
    
    * src/ftbench.c: Include `ftmm.h`.
    (MAX_MM_AXES): New macro.
    (multimaster, design_pos, requested_pos, requested_cnt, used_num_axes): New
    global variables.
    (get_face): Load MM data if requested.
    (parse_design_coords): New function.
    
    * man/ftbench.1: Updated.
---
 man/ftbench.1 |  6 +++++
 src/ftbench.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/man/ftbench.1 b/man/ftbench.1
index 9211c72..352c97a 100644
--- a/man/ftbench.1
+++ b/man/ftbench.1
@@ -27,6 +27,12 @@ This program is part of the FreeType demos package.
 .SH OPTIONS
 .
 .TP
+.BI "\-a\ \(dq" "axis1\ axis2\ .\|.\|." \(dq
+For Multiple Master, GX, or OpenType variation fonts, specify design
+coordinates for each axis at start-up.
+Ignored for all other font formats.
+.
+.TP
 .BI \-b \ tests
 Perform chosen tests:
 .
diff --git a/src/ftbench.c b/src/ftbench.c
index f02a6f6..2f0f2a4 100644
--- a/src/ftbench.c
+++ b/src/ftbench.c
@@ -29,11 +29,14 @@
 #include <freetype/ftdriver.h>
 #include <freetype/ftglyph.h>
 #include <freetype/ftlcdfil.h>
+#include <freetype/ftmm.h>
 #include <freetype/ftmodapi.h>
 #include <freetype/ftoutln.h>
 #include <freetype/ftstroke.h>
 #include <freetype/ftsynth.h>
 
+#define MAX_MM_AXES 16
+
 #ifdef UNIX
 #include <unistd.h>
 #else
@@ -105,6 +108,11 @@
   static FTC_SBitCache     sbit_cache;
   static FTC_ImageTypeRec  font_type;
 
+  static FT_MM_Var*    multimaster   = NULL;
+  static FT_Fixed      design_pos   [MAX_MM_AXES];
+  static FT_Fixed      requested_pos[MAX_MM_AXES];
+  static unsigned int  requested_cnt = 0;
+  static unsigned int  used_num_axes = 0;
 
   enum {
     FT_BENCH_LOAD_GLYPH,
@@ -925,6 +933,49 @@
     if ( error )
       fprintf( stderr, "couldn't load font resource\n");
 
+    /* Set up MM_Var. */
+    if ( requested_cnt != 0 )
+    {
+      unsigned int  n;
+
+
+      error = FT_Get_MM_Var( *face, &multimaster );
+      if ( error )
+      {
+        fprintf( stderr, "couldn't load MultiMaster info\n" );
+        return error;
+      }
+
+      used_num_axes = multimaster->num_axis;
+
+      for ( n = 0; n < used_num_axes; n++ )
+      {
+        FT_Var_Axis*  a = multimaster->axis + n;
+
+
+        design_pos[n] = n < requested_cnt ? requested_pos[n] : a->def;
+
+        if ( design_pos[n] < a->minimum )
+          design_pos[n] = a->minimum;
+        else if ( design_pos[n] > a->maximum )
+          design_pos[n] = a->maximum;
+
+        if ( !FT_IS_SFNT( *face ) )
+          design_pos[n] = FT_RoundFix( design_pos[n] );
+      }
+
+      error = FT_Set_Var_Design_Coordinates( *face,
+                                             used_num_axes,
+                                             design_pos );
+      if ( error )
+      {
+        fprintf( stderr, "couldn't set design coordinates\n" );
+        return error;
+      }
+
+      FT_Done_MM_Var( lib, multimaster );
+    }
+
     return error;
   }
 
@@ -1023,6 +1074,21 @@
 #define TEST( x ) ( !test_string || strchr( test_string, (x) ) )
 
 
+  static void
+  parse_design_coords( char  *s )
+  {
+    for ( requested_cnt = 0;
+          requested_cnt < MAX_MM_AXES && *s;
+          requested_cnt++ )
+    {
+      requested_pos[requested_cnt] = (FT_Fixed)( strtod( s, &s ) * 65536.0 );
+
+      while ( *s==' ' )
+        ++s;
+    }
+  }
+
+
   int
   main( int     argc,
         char**  argv )
@@ -1106,13 +1172,17 @@
       int  opt;
 
 
-      opt = getopt( argc, argv, "b:Cc:e:f:H:I:i:l:m:pr:s:t:v" );
+      opt = getopt( argc, argv, "a:b:Cc:e:f:H:I:i:l:m:pr:s:t:v" );
 
       if ( opt == -1 )
         break;
 
       switch ( opt )
       {
+      case 'a':
+        parse_design_coords( optarg );
+        break;
+
       case 'b':
         test_string = optarg;
         break;