font options: Add private round_glpyh_positions field

Signed-off-by: Uli Schlachter <psychon@znc.in>

src/cairo-font-options.c

@@ -54,7 +54,8 @@ static const cairo_font_options_t _cairo_font_options_nil = {
     CAIRO_SUBPIXEL_ORDER_DEFAULT,
     CAIRO_LCD_FILTER_DEFAULT,
     CAIRO_HINT_STYLE_DEFAULT,
-    CAIRO_HINT_METRICS_DEFAULT
+    CAIRO_HINT_METRICS_DEFAULT,
+    CAIRO_ROUND_GLYPH_POS_DEFAULT
 };
 
 /**
@@ -71,6 +72,7 @@ _cairo_font_options_init_default (cairo_font_options_t *options)
     options->lcd_filter = CAIRO_LCD_FILTER_DEFAULT;
     options->hint_style = CAIRO_HINT_STYLE_DEFAULT;
     options->hint_metrics = CAIRO_HINT_METRICS_DEFAULT;
+    options->round_glyph_positions = CAIRO_ROUND_GLYPH_POS_DEFAULT;
 }
 
 void
@@ -82,6 +84,7 @@ _cairo_font_options_init_copy (cairo_font_options_t		*options,
     options->lcd_filter = other->lcd_filter;
     options->hint_style = other->hint_style;
     options->hint_metrics = other->hint_metrics;
+    options->round_glyph_positions = other->round_glyph_positions;
 }
 
 /**
@@ -211,6 +214,8 @@ cairo_font_options_merge (cairo_font_options_t       *options,
 	options->hint_style = other->hint_style;
     if (other->hint_metrics != CAIRO_HINT_METRICS_DEFAULT)
 	options->hint_metrics = other->hint_metrics;
+    if (other->round_glyph_positions != CAIRO_ROUND_GLYPH_POS_DEFAULT)
+	options->round_glyph_positions = other->round_glyph_positions;
 }
 slim_hidden_def (cairo_font_options_merge);
 
@@ -241,7 +246,8 @@ cairo_font_options_equal (const cairo_font_options_t *options,
 	    options->subpixel_order == other->subpixel_order &&
 	    options->lcd_filter == other->lcd_filter &&
 	    options->hint_style == other->hint_style &&
-	    options->hint_metrics == other->hint_metrics);
+	    options->hint_metrics == other->hint_metrics &&
+	    options->round_glyph_positions == other->round_glyph_positions);
 }
 slim_hidden_def (cairo_font_options_equal);
 
@@ -389,6 +395,45 @@ _cairo_font_options_get_lcd_filter (const cairo_font_options_t *options)
     return options->lcd_filter;
 }
 
+/**
+ * _cairo_font_options_set_round_glyph_positions:
+ * @options: a #cairo_font_options_t
+ * @round: the new rounding value
+ *
+ * Sets the rounding options for the font options object. If rounding is set, a
+ * glyph's position will be rounded to integer values.
+ *
+ * Since: 1.12
+ **/
+void
+_cairo_font_options_set_round_glyph_positions (cairo_font_options_t *options,
+					       cairo_round_glyph_positions_t  round)
+{
+    if (cairo_font_options_status (options))
+	return;
+
+    options->round_glyph_positions = round;
+}
+
+/**
+ * _cairo_font_options_get_round_glyph_positions:
+ * @options: a #cairo_font_options_t
+ *
+ * Gets the glyph position rounding option for the font options object.
+ *
+ * Return value: The round glyph posistions flag for the font options object.
+ *
+ * Since: 1.12
+ **/
+cairo_round_glyph_positions_t
+_cairo_font_options_get_round_glyph_positions (const cairo_font_options_t *options)
+{
+    if (cairo_font_options_status ((cairo_font_options_t *) options))
+	return CAIRO_ROUND_GLYPH_POS_DEFAULT;
+
+    return options->round_glyph_positions;
+}
+
 /**
  * cairo_font_options_set_hint_style:
  * @options: a #cairo_font_options_t

src/cairo-surface.c

@@ -123,7 +123,8 @@ const cairo_surface_t name = {					\
       CAIRO_SUBPIXEL_ORDER_DEFAULT,	/* subpixel_order */	\
       CAIRO_LCD_FILTER_DEFAULT,		/* lcd_filter */	\
       CAIRO_HINT_STYLE_DEFAULT,		/* hint_style */	\
-      CAIRO_HINT_METRICS_DEFAULT	/* hint_metrics */	\
+      CAIRO_HINT_METRICS_DEFAULT,	/* hint_metrics */	\
+      CAIRO_ROUND_GLYPH_POS_DEFAULT	/* round_glyph_positions */	\
     }					/* font_options */	\
 }
 

src/cairo-types-private.h

@@ -161,12 +161,19 @@ typedef enum _cairo_lcd_filter {
     CAIRO_LCD_FILTER_FIR5
 } cairo_lcd_filter_t;
 
+typedef enum _cairo_round_glyph_positions {
+    CAIRO_ROUND_GLYPH_POS_DEFAULT,
+    CAIRO_ROUND_GLYPH_POS_ON,
+    CAIRO_ROUND_GLYPH_POS_OFF
+} cairo_round_glyph_positions_t;
+
 struct _cairo_font_options {
     cairo_antialias_t antialias;
     cairo_subpixel_order_t subpixel_order;
     cairo_lcd_filter_t lcd_filter;
     cairo_hint_style_t hint_style;
     cairo_hint_metrics_t hint_metrics;
+    cairo_round_glyph_positions_t round_glyph_positions;
 };
 
 /* XXX: Right now, the _cairo_color structure puts unpremultiplied

src/cairoint.h

@@ -1088,6 +1088,13 @@ _cairo_font_options_set_lcd_filter (cairo_font_options_t   *options,
 cairo_private cairo_lcd_filter_t
 _cairo_font_options_get_lcd_filter (const cairo_font_options_t *options);
 
+cairo_private void
+_cairo_font_options_set_round_glyph_positions (cairo_font_options_t   *options,
+					       cairo_round_glyph_positions_t  round);
+
+cairo_private cairo_round_glyph_positions_t
+_cairo_font_options_get_round_glyph_positions (const cairo_font_options_t *options);
+
 /* cairo-hull.c */
 cairo_private cairo_status_t
 _cairo_hull_compute (cairo_pen_vertex_t *vertices, int *num_vertices);