Formatting.

ChangeLog

@@ -2,25 +2,25 @@
 
 	[smooth] Sub-banding protocol revision.
 
-	Rasterization sub-banding is utilized at large sizes while using
+	Rasterization sub-banding is utilized at large sizes while using a
 	rather small fixed memory pool.  Indeed it is possible to make an
 	educated guess how much memory is necessary at a given size for a
-	given glyph. It turns out that, for large majority of European glyphs,
-	you should store about 8 times more boundary pixels than their height.
-	Or, vice versa, if your memory pool can hold 800 pixels the band
-	height should be 100 and you should sub-band anything larger than
-	that. Should you still run out of memory, FreeType bisects the band
-	but you have wasted some time. This is what has been implemented in
-	FreeType since the beginning.
+	given glyph.  It turns out that, for a large majority of European
+	glyphs, you should store about 8 times more boundary pixels than
+	their height.  Or, vice versa, if your memory pool can hold 800
+	pixels the band height should be 100 and you should sub-band
+	anything larger than that.  Should you still run out of memory,
+	FreeType bisects the band but you have wasted some time.  This is
+	what has been implemented in FreeType since the beginning.
 
-	It was overlooked, however, that the top band could grow to twice the
-	default band size leading to unnecessary memory overflows there. This
-	commit fixes that. Now the bands are distributed more evenly and
-	cannot exceed the default size.
+	It was overlooked, however, that the top band could grow to twice
+	the default band size leading to unnecessary memory overflows there.
+	This commit fixes that.  Now the bands are distributed more evenly
+	and cannot exceed the default size.
 
 	Now the magic number 8 is really suitable for rather simple European
-	scripts. For complex Chinese logograms the magic number should be 13
-	but that is subject for another day.
+	scripts.  For complex Chinese logograms the magic number should be
+	13 but that is subject for another day.
 
 	* src/smooth/ftgrays.c (gray_convert_glyph): Revise sub-banding
 	protocol.

include/freetype/config/ftstdlib.h

@@ -143,6 +143,7 @@
 
 
 #define ft_atol    atol
+#define ft_getenv  getenv
 
 
   /**********************************************************************/

src/base/ftinit.c

@@ -226,6 +226,123 @@
   }
 
 
+#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
+
+#define MAX_LENGTH  128
+
+  /*
+   * The `FREETYPE_PROPERTIES' environment variable has the following
+   * syntax form (broken here into multiple lines for better readability)
+   *
+   *   <whitespace>
+   *   <module-name1> ':'
+   *   <property-name1> '=' <property-value1>
+   *   <whitespace>
+   *   <module-name2> ':'
+   *   <property-name2> '=' <property-value2>
+   *   ...
+   *
+   * Example:
+   *
+   *   FREETYPE_PROPERTIES=truetype:interpreter-version=35 \
+   *                       cff:no-stem-darkening=1 \
+   *                       autofitter:warping=1
+   *
+   */
+
+  static void
+  ft_get_default_properties( FT_Library  library )
+  {
+    const char*  env;
+    const char*  p;
+    const char*  q;
+
+    char  module_name[MAX_LENGTH + 1];
+    char  property_name[MAX_LENGTH + 1];
+    char  property_value[MAX_LENGTH + 1];
+
+    int  i;
+
+
+    env = getenv( "FREETYPE_PROPERTIES" );
+    if ( !env )
+      return;
+
+    for ( p = env; *p; p++ )
+    {
+      module_name[0]    = '\0';
+      property_name[0]  = '\0';
+      property_value[0] = '\0';
+
+      /* skip leading whitespace and separators */
+      if ( *p == ' ' || *p == '\t' )
+        continue;
+
+      /* read module name, followed by `:' */
+      q = p;
+      for ( i = 0; i < MAX_LENGTH; i++ )
+      {
+        if ( !*p || *p == ':' )
+          break;
+        module_name[i] = *p++;
+      }
+      module_name[i] = '\0';
+
+      if ( !*p )
+        break;
+      if ( *p != ':' || p == q )
+        break;
+
+      /* read property name, followed by `=' */
+      q = p;
+      for ( i = 0; i < MAX_LENGTH; i++ )
+      {
+        if ( !*p || *p == '=' )
+          break;
+        property_name[i] = *p++;
+      }
+      property_name[i] = '\0';
+
+      if ( !*p )
+        break;
+      if ( *p != '=' || p == q )
+        break;
+
+      /* read property value, followed by whitespace (if any) */
+      q = p;
+      for ( i = 0; i < MAX_LENGTH; i++ )
+      {
+        if ( !*p || *p == ' ' || *p == '\t' )
+          break;
+        property_value[i] = *p++;
+      }
+      property_value[i] = '\0';
+
+      if ( !( *p == '\0' || *p == ' ' || *p == '\t' ) || p == q )
+        break;
+
+      /* we have all data; resolve them into a call to FT_Property_Set */
+      /* if possible                                                   */
+
+      /* we completely ignore errors */
+      FT_Property_Set( library,
+                       module_name,
+                       property_name,
+                       property_value );
+    }
+  }
+
+#else
+
+  static void
+  ft_get_default_properties( FT_Library  library )
+  {
+    FT_UNUSED( library );
+  }
+
+#endif
+
+
   /* documentation is in freetype.h */
 
   FT_EXPORT_DEF( FT_Error )
@@ -256,6 +373,8 @@
     else
       FT_Add_Default_Modules( *alibrary );
 
+    ft_get_default_properties( *alibrary );
+
     return error;
   }
 

src/smooth/ftgrays.c

@@ -1911,7 +1911,7 @@ typedef ptrdiff_t  FT_PtrDist;
     min   = ras.min_ey;
     max_y = ras.max_ey;
 
-    for (; min < max_y; min = max )
+    for ( ; min < max_y; min = max )
     {
       max = min + band_size;
       if ( max > max_y )