Bug 347236 – provide pango_cairo_font_get_scaled_font Bug 347235 – Add

2007-06-10  Behdad Esfahbod  <behdad@gnome.org>

        Bug 347236 – provide pango_cairo_font_get_scaled_font
        Bug 347235 – Add pango_cairo_font_map_get_font_type
        Bug 353291 – Provide pango_cairo_font_map_new_for_font_type

        * pango/pangocairo-font.c: New public API:
        
                pango_cairo_font_get_scaled_font()

        * pango/pangocairo-fontmap.c: New public API:
        
                pango_cairo_font_map_new_for_font_type()
                pango_cairo_font_map_get_font_type()

        * pango/pangocairo-fcfontmap.c:
        Implement get_font_type() method.

        * pango/pangocairo.h:
        * pango/pangocairo-private.h:
        * docs/pango-sections.txt:
        * docs/tmpl/pangocairo.sgml:
        * pango/pangocairo.def:
        Update.


svn path=/trunk/; revision=2336

7 files changed, 105 insertions, 11 deletions

diff --git a/pango/pangocairo-fcfontmap.c b/pango/pangocairo-fcfontmap.c
index bcecb059..967ca8f4 100644
--- a/pango/pangocairo-fcfontmap.c
+++ b/pango/pangocairo-fcfontmap.c
@@ -52,11 +52,18 @@ pango_cairo_fc_font_map_get_resolution_cairo (PangoCairoFontMap *cfontmap)
   return cffontmap->dpi;
 }
 
+static cairo_font_type_t
+pango_cairo_fc_font_map_get_font_type (PangoCairoFontMap *cfontmap)
+{
+  return CAIRO_FONT_TYPE_FT;
+}
+
 static void
 cairo_font_map_iface_init (PangoCairoFontMapIface *iface)
 {
   iface->set_resolution = pango_cairo_fc_font_map_set_resolution;
   iface->get_resolution = pango_cairo_fc_font_map_get_resolution_cairo;
+  iface->get_font_type  = pango_cairo_fc_font_map_get_font_type;
 }
 
 G_DEFINE_TYPE_WITH_CODE (PangoCairoFcFontMap, pango_cairo_fc_font_map, PANGO_TYPE_FC_FONT_MAP,
diff --git a/pango/pangocairo-font.c b/pango/pangocairo-font.c
index 5f439998..9b449c0e 100644
--- a/pango/pangocairo-font.c
+++ b/pango/pangocairo-font.c
@@ -140,8 +140,20 @@ done:
   return cf_priv->scaled_font;
 }
 
-static cairo_scaled_font_t *
-_pango_cairo_font_get_scaled_font (PangoFont *cfont)
+/**
+ * pango_cairo_font_get_scaled_font:
+ * @font: a #PangoFont from a #PangoCairoFontMap
+ *
+ * Gets the #cairo_scaled_font_t used by @font.
+ * The scaled font can be referenced and ketp using
+ * cairo_scaled_font_reference().
+ *
+ * Return value: the #cairo_scaled_font_t used by @font
+ *
+ * Since: 1.18
+ **/
+cairo_scaled_font_t *
+pango_cairo_font_get_scaled_font (PangoFont *cfont)
 {
   PangoCairoFontPrivate *cf_priv;
 
@@ -150,7 +162,7 @@ _pango_cairo_font_get_scaled_font (PangoFont *cfont)
       if (!_pango_cairo_warning_history.font_get_scaled_font)
 	{
 	  _pango_cairo_warning_history.font_get_scaled_font = TRUE;
-	  g_warning ("_pango_cairo_font_get_scaled_font called with bad font, expect ugly output");
+	  g_warning ("pango_cairo_font_get_scaled_font called with bad font, expect ugly output");
 	}
       return NULL;
     }
@@ -174,7 +186,7 @@ gboolean
 _pango_cairo_font_install (PangoFont *font,
 			   cairo_t   *cr)
 {
-  cairo_scaled_font_t *scaled_font = _pango_cairo_font_get_scaled_font (font);
+  cairo_scaled_font_t *scaled_font = pango_cairo_font_get_scaled_font (font);
 
   if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
     return FALSE;
@@ -392,7 +404,7 @@ _pango_cairo_font_private_get_hex_box_info (PangoCairoFontPrivate *cf_priv)
   cairo_font_options_destroy (font_options);
 
 
-  scaled_mini_font = _pango_cairo_font_get_scaled_font (mini_font);
+  scaled_mini_font = pango_cairo_font_get_scaled_font (mini_font);
 
   for (i = 0 ; i < 16 ; i++)
     {
diff --git a/pango/pangocairo-fontmap.c b/pango/pangocairo-fontmap.c
index e16579e2..31e36621 100644
--- a/pango/pangocairo-fontmap.c
+++ b/pango/pangocairo-fontmap.c
@@ -95,10 +95,55 @@ pango_cairo_font_map_new (void)
   return g_object_new (PANGO_TYPE_CAIRO_WIN32_FONT_MAP, NULL);
 #elif defined(HAVE_CAIRO_FREETYPE)
   return g_object_new (PANGO_TYPE_CAIRO_FC_FONT_MAP, NULL);
+#else
+  g_assert_not_reached ();
+  return NULL;
 #endif
 }
 
 /**
+ * pango_cairo_font_map_new_for_font_type:
+ *
+ * Creates a new #PangoCairoFontMap object of the type suitable
+ * to be used with cairo font backend of type @fonttype.
+ *
+ * In most cases one should simply use @pango_cairo_font_map_new(),
+ * or in fact in most of those cases, just use
+ * @pango_cairo_font_map_get_default().
+ *
+ * Return value: the newly allocated #PangoFontMap of suitable type
+ *               which should be freed with g_object_unref(),
+ *               or %NULL if the requested cairo font backend is
+ *               not supported.
+ *
+ * Since: 1.18
+ **/
+PangoFontMap *
+pango_cairo_font_map_new_for_font_type (cairo_font_type_t fonttype)
+{
+  /* Make sure that the type system is initialized */
+  g_type_init ();
+
+  switch (fonttype)
+  {
+#if defined(HAVE_CAIRO_ATSUI)
+    case CAIRO_FONT_TYPE_ATSUI:
+      return g_object_new (PANGO_TYPE_CAIRO_ATSUI_FONT_MAP, NULL);
+#endif
+#if defined(HAVE_CAIRO_WIN32)
+    case CAIRO_FONT_TYPE_WIN32:
+      return g_object_new (PANGO_TYPE_CAIRO_WIN32_FONT_MAP, NULL);
+#endif
+#if defined(HAVE_CAIRO_FREETYPE)
+    case CAIRO_FONT_TYPE_FT:
+      return g_object_new (PANGO_TYPE_CAIRO_FC_FONT_MAP, NULL);
+#endif
+    default:
+      return NULL;
+  }
+}
+
+/**
  * pango_cairo_font_map_get_default:
  *
  * Gets a default font map to use with Cairo.
@@ -113,7 +158,7 @@ pango_cairo_font_map_get_default (void)
 {
   static PangoFontMap *default_font_map = NULL;
 
-  if (!default_font_map)
+  if (G_UNLIKELY (!default_font_map))
     default_font_map = pango_cairo_font_map_new ();
 
   return default_font_map;
@@ -181,3 +226,21 @@ pango_cairo_font_map_create_context (PangoCairoFontMap *fontmap)
 
   return context;
 }
+
+/**
+ * pango_cairo_font_map_get_font_type:
+ * @fontmap: a #PangoCairoFontMap
+ *
+ * Gets the type of Cairo font backend that @fontmap uses.  
+ *
+ * Return value: the #cairo_font_type_t cairo font backend type
+ *
+ * Since: 1.18
+ **/
+cairo_font_type_t
+pango_cairo_font_map_get_font_type (PangoCairoFontMap *fontmap)
+{
+  g_return_val_if_fail (PANGO_IS_CAIRO_FONT_MAP (fontmap), CAIRO_FONT_TYPE_TOY);
+
+  return (* PANGO_CAIRO_FONT_MAP_GET_IFACE (fontmap)->get_font_type) (fontmap);
+}
diff --git a/pango/pangocairo-private.h b/pango/pangocairo-private.h
index e5a7c382..1fb100a2 100644
--- a/pango/pangocairo-private.h
+++ b/pango/pangocairo-private.h
@@ -39,6 +39,8 @@ struct _PangoCairoFontMapIface
   void           (*set_resolution) (PangoCairoFontMap *fontmap,
 				    double             dpi);
   double         (*get_resolution) (PangoCairoFontMap *fontmap);
+
+  cairo_font_type_t (*get_font_type) (PangoCairoFontMap *fontmap);
 };
 
 
diff --git a/pango/pangocairo-render.c b/pango/pangocairo-render.c
index d14d980d..b0ef136d 100644
--- a/pango/pangocairo-render.c
+++ b/pango/pangocairo-render.c
@@ -602,7 +602,7 @@ _pango_cairo_do_error_underline (cairo_t *cr,
 /**
  * pango_cairo_show_glyph_string:
  * @cr: a Cairo context
- * @font: a #PangoFont
+ * @font: a #PangoFont from a #PangoCairoFontMap
  * @glyphs: a #PangoGlyphString
  *
  * Draws the glyphs in @glyphs in the specified cairo context.
@@ -696,7 +696,7 @@ pango_cairo_show_error_underline (cairo_t *cr,
 /**
  * pango_cairo_glyph_string_path
  * @cr: a Cairo context
- * @font: a #PangoFont
+ * @font: a #PangoFont from a #PangoCairoFontMap
  * @glyphs: a #PangoGlyphString
  *
  * Adds the glyphs in @glyphs to the current path in the specified
diff --git a/pango/pangocairo.def b/pango/pangocairo.def
index 308bc7a9..b16c0f2a 100644
--- a/pango/pangocairo.def
+++ b/pango/pangocairo.def
@@ -10,11 +10,14 @@ EXPORTS
 ;	pango_cairo_fc_font_get_type
 ;	pango_cairo_fc_font_map_get_type
 	pango_cairo_font_get_type
+	pango_cairo_font_get_scaled_font
 	pango_cairo_font_map_create_context
 	pango_cairo_font_map_get_default
+	pango_cairo_font_map_get_font_type
 	pango_cairo_font_map_get_resolution
 	pango_cairo_font_map_get_type
 	pango_cairo_font_map_new
+	pango_cairo_font_map_new_for_font_type
 	pango_cairo_font_map_set_resolution
 	pango_cairo_glyph_string_path
 	pango_cairo_layout_line_path
diff --git a/pango/pangocairo.h b/pango/pangocairo.h
index d8085112..2e75b28d 100644
--- a/pango/pangocairo.h
+++ b/pango/pangocairo.h
@@ -52,16 +52,23 @@ typedef void (* PangoCairoShapeRendererFunc) (cairo_t        *cr,
 /*
  * PangoCairoFontMap
  */
-GType         pango_cairo_font_map_get_type    (void);
+GType         pango_cairo_font_map_get_type          (void);
 
-PangoFontMap *pango_cairo_font_map_new         (void);
-PangoFontMap *pango_cairo_font_map_get_default (void);
+PangoFontMap *pango_cairo_font_map_new               (void);
+PangoFontMap *pango_cairo_font_map_new_for_font_type (cairo_font_type_t fonttype);
+PangoFontMap *pango_cairo_font_map_get_default       (void);
+cairo_font_type_t pango_cairo_font_map_get_font_type (PangoCairoFontMap *fontmap);
 
 void          pango_cairo_font_map_set_resolution (PangoCairoFontMap *fontmap,
 						   double             dpi);
 double        pango_cairo_font_map_get_resolution (PangoCairoFontMap *fontmap);
 PangoContext *pango_cairo_font_map_create_context (PangoCairoFontMap *fontmap);
 
+/*
+ * PangoFont methods available to PangoCairo fonts
+ */
+cairo_scaled_font_t *pango_cairo_font_get_scaled_font (PangoFont *font);
+
 /* Update a Pango context for the current state of a cairo context
  */
 void         pango_cairo_update_context (cairo_t      *cr,