[freetype2-demos] master ce69951: * bin/ftlint.c (main): Implement limited indexing.

[Werner Lemberg]

branch: master
commit ce69951f511738f7637b9a5db1c70a170a4d319a
Author: Alexei Podtelezhnikov <apodtele@gmail.com>
Commit: Alexei Podtelezhnikov <apodtele@gmail.com>

    * bin/ftlint.c (main): Implement limited indexing.
    (Usage): Document it.
---
 ChangeLog    |  5 +++++
 src/ftlint.c | 35 +++++++++++++++++++++++++++++------
 2 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 3159acd..dff7aeb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-14  Alexei Podtelezhnikov  <apodtele@gmail.com>
+
+       * bin/ftlint.c (main): Implement limited indexing.
+       (Usage): Document it.
+
 2021-06-13  Sarthak Bhardwaj  <1sarthakbhardwaj@gmail.com>
             Anurag Thakur  <devanuragthakur@gmail.com>
 
diff --git a/src/ftlint.c b/src/ftlint.c
index 9944f5d..1a6311c 100644
--- a/src/ftlint.c
+++ b/src/ftlint.c
@@ -39,7 +39,6 @@
   static FT_Render_Mode  render_mode = FT_RENDER_MODE_NORMAL;
   static FT_Int32        load_flags  = FT_LOAD_DEFAULT;
 
-  static unsigned int  num_glyphs;
   static int           ptsize;
 
   static int  Fail;
@@ -54,8 +53,9 @@
     printf( "Usage: %s [options] ppem fontname[.ttf|.ttc] [fontname2..]\n",
             name );
     printf( "\n" );
-    printf( "  -f L   Use hex number L as load flags (see `FT_LOAD_XXX').\n" );
-    printf( "  -r N   Set render mode to N\n" );
+    printf( "  -f L    Use hex number L as load flags (see `FT_LOAD_XXX')\n" );
+    printf( "  -r N    Set render mode to N\n" );
+    printf( "  -i I-J  Range of glyph indices to use (default: all)\n" );
 
     exit( 1 );
   }
@@ -116,6 +116,8 @@
     char*         execname;
     char*         fname;
     int           opt;
+    int           first_index = 0;
+    int           last_index = ~0;
 
 
     execname = argv[0];
@@ -123,7 +125,7 @@
     if ( argc < 3 )
       Usage( execname );
 
-    while ( ( opt =  getopt( argc, argv, "f:r:") ) != -1)
+    while ( ( opt =  getopt( argc, argv, "f:r:i:") ) != -1)
     {
 
       switch ( opt )
@@ -145,6 +147,23 @@
         }
         break;
 
+      case 'i':
+        {
+          int           j;
+          unsigned int  fi, li;
+
+          j = sscanf( optarg, "%u%*[,:-]%u", &fi, &li );
+
+          if ( j == 2 )
+          {
+            first_index = fi;
+            last_index  = li >= fi ? li : ~0;
+          }
+          else if ( j == 1 )
+            first_index = last_index = fi;
+        }
+        break;
+
       default:
         Usage( execname );
         break;
@@ -232,7 +251,11 @@
       if (error) Panic( "Could not open file" );
 
   Success:
-      num_glyphs = (unsigned int)face->num_glyphs;
+      if ( first_index > (unsigned int)face->num_glyphs )
+        first_index = 0;
+      if ( last_index > (unsigned int)face->num_glyphs )
+        last_index = (unsigned int)face->num_glyphs - 1;
+
 
 #ifdef  TEST_PSNAMES
       {
@@ -248,7 +271,7 @@
 
       Fail = 0;
       {
-        for ( id = 0; id < num_glyphs; id++ )
+        for ( id = first_index; id <= last_index; id++ )
         {
           error = FT_Load_Glyph( face, id, load_flags );
           if ( error )