Add OpenType/CFF Subsetting

1 files changed, 40 insertions, 0 deletions

diff --git a/src/cairo-scaled-font-subsets-private.h b/src/cairo-scaled-font-subsets-private.h
index 01eeb3fbd..2c81fdc63 100644
--- a/src/cairo-scaled-font-subsets-private.h
+++ b/src/cairo-scaled-font-subsets-private.h
@@ -179,6 +179,46 @@ _cairo_scaled_font_subsets_foreach (cairo_scaled_font_subsets_t			*font_subsets,
 				    cairo_scaled_font_subset_callback_func_t	 font_subset_callback,
 				    void					*closure);
 
+typedef struct _cairo_cff_subset {
+    char *base_font;
+    int *widths;
+    long x_min, y_min, x_max, y_max;
+    long ascent, descent;
+    char *data;
+    unsigned long data_length;
+} cairo_cff_subset_t;
+
+/**
+ * _cairo_cff_subset_init:
+ * @cff_subset: a #cairo_cff_subset_t to initialize
+ * @font_subset: the #cairo_scaled_font_subset_t to initialize from
+ *
+ * If possible (depending on the format of the underlying
+ * cairo_scaled_font_t and the font backend in use) generate a
+ * cff file corresponding to @font_subset and initialize
+ * @cff_subset with information about the subset and the cff
+ * data.
+ *
+ * Return value: CAIRO_STATUS_SUCCESS if successful,
+ * CAIRO_INT_STATUS_UNSUPPORTED if the font can't be subset as a
+ * cff file, or an non-zero value indicating an error.  Possible
+ * errors include CAIRO_STATUS_NO_MEMORY.
+ **/
+cairo_private cairo_status_t
+_cairo_cff_subset_init (cairo_cff_subset_t          *cff_subset,
+                        const char                  *name,
+                        cairo_scaled_font_subset_t  *font_subset);
+
+/**
+ * _cairo_cff_subset_fini:
+ * @cff_subset: a #cairo_cff_subset_t
+ *
+ * Free all resources associated with @cff_subset.  After this
+ * call, @cff_subset should not be used again without a
+ * subsequent call to _cairo_cff_subset_init() again first.
+ **/
+cairo_private void
+_cairo_cff_subset_fini (cairo_cff_subset_t *cff_subset);
 
 typedef struct _cairo_truetype_subset {
     char *base_font;