Add functions to return Gdk::Pixbuf's for gradients and gradient stops.

2 files changed, 80 insertions, 0 deletions

diff --git a/src/widgets/gradient-image.cpp b/src/widgets/gradient-image.cpp
index dff564feb..638cffda6 100644
--- a/src/widgets/gradient-image.cpp
+++ b/src/widgets/gradient-image.cpp
@@ -11,11 +11,15 @@
  */
 
 #include <sigc++/sigc++.h>
+#include <glibmm/refptr.h>
+#include <gdkmm/pixbuf.h>
+#include <cairomm/surface.h>
 
 #include "display/cairo-utils.h"
 #include "gradient-image.h"
 #include "macros.h"
 #include "sp-gradient.h"
+#include "sp-stop.h"
 
 #define VBLOCK 16
 
@@ -153,6 +157,75 @@ sp_gradient_to_pixbuf (SPGradient *gr, int width, int height)
 }
 
 
+Glib::RefPtr<Gdk::Pixbuf>
+sp_gradient_to_pixbuf_ref (SPGradient *gr, int width, int height)
+{
+    cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
+    cairo_t *ct = cairo_create(s);
+
+    cairo_pattern_t *check = ink_cairo_pattern_create_checkerboard();
+    cairo_set_source(ct, check);
+    cairo_paint(ct);
+    cairo_pattern_destroy(check);
+
+    if (gr) {
+        cairo_pattern_t *p = sp_gradient_create_preview_pattern(gr, width);
+        cairo_set_source(ct, p);
+        cairo_paint(ct);
+        cairo_pattern_destroy(p);
+    }
+
+    cairo_destroy(ct);
+    cairo_surface_flush(s);
+
+    Cairo::RefPtr<Cairo::Surface> sref = Cairo::RefPtr<Cairo::Surface>(new Cairo::Surface(s));
+    Glib::RefPtr<Gdk::Pixbuf> pixbuf =
+        Gdk::Pixbuf::create(sref, 0, 0, width, height);
+
+    cairo_surface_destroy(s);
+
+    return pixbuf;
+}
+
+
+Glib::RefPtr<Gdk::Pixbuf>
+sp_gradstop_to_pixbuf_ref (SPStop *stop, int width, int height)
+{
+    cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
+    cairo_t *ct = cairo_create(s);
+
+    /* Checkerboard background */
+    cairo_pattern_t *check = ink_cairo_pattern_create_checkerboard();
+    cairo_rectangle(ct, 0, 0, width, height);
+    cairo_set_source(ct, check);
+    cairo_fill_preserve(ct);
+    cairo_pattern_destroy(check);
+
+    if (stop) {
+        /* Alpha area */
+        cairo_rectangle(ct, 0, 0, width/2, height);
+        ink_cairo_set_source_rgba32(ct, stop->get_rgba32());
+        cairo_fill(ct);
+
+        /* Solid area */
+        cairo_rectangle(ct, width/2, 0, width, height);
+        ink_cairo_set_source_rgba32(ct, stop->get_rgba32() | 0xff);
+        cairo_fill(ct);
+    }
+
+    cairo_destroy(ct);
+    cairo_surface_flush(s);
+
+    Cairo::RefPtr<Cairo::Surface> sref = Cairo::RefPtr<Cairo::Surface>(new Cairo::Surface(s));
+    Glib::RefPtr<Gdk::Pixbuf> pixbuf =
+        Gdk::Pixbuf::create(sref, 0, 0, width, height);
+
+    cairo_surface_destroy(s);
+
+    return pixbuf;
+}
+
+
 void
 sp_gradient_image_set_gradient (SPGradientImage *image, SPGradient *gradient)
 {
diff --git a/src/widgets/gradient-image.h b/src/widgets/gradient-image.h
index 0d3833441..a1b665f16 100644
--- a/src/widgets/gradient-image.h
+++ b/src/widgets/gradient-image.h
@@ -14,8 +14,13 @@
  */
 
 #include <gtk/gtk.h>
+#include <glibmm/refptr.h>
 
 class SPGradient;
+class SPStop;
+namespace Gdk {
+    class Pixbuf;
+}
 
 #include <sigc++/connection.h>
 
@@ -41,6 +46,8 @@ GType sp_gradient_image_get_type (void);
 
 GtkWidget *sp_gradient_image_new (SPGradient *gradient);
 GdkPixbuf *sp_gradient_to_pixbuf (SPGradient *gr, int width, int height);
+Glib::RefPtr<Gdk::Pixbuf> sp_gradient_to_pixbuf_ref (SPGradient *gr, int width, int height);
+Glib::RefPtr<Gdk::Pixbuf> sp_gradstop_to_pixbuf_ref (SPStop     *gr, int width, int height);
 void sp_gradient_image_set_gradient (SPGradientImage *gi, SPGradient *gr);
 
 #endif