[gtk+/cairo-style: 2/23] pixbuf-engine: Make theme_pixbuf_render take a cairo_t

[Benjamin Otte <otte src gnome org>]

commit 9a702e419f32663861ff209c69ebb35de38c5083
Author: Benjamin Otte <otte redhat com>
Date:   Tue Aug 17 04:37:03 2010 +0200

    pixbuf-engine: Make theme_pixbuf_render take a cairo_t
    
    This is in preparation for the theme engine switch to Cairo. We keep the
    old function around so that we can step-by-step upgrade all the vfuncs.

 modules/engines/pixbuf/pixbuf-draw.c   |   16 +++++-----
 modules/engines/pixbuf/pixbuf-render.c |   54 +++++++++++++++++--------------
 modules/engines/pixbuf/pixbuf.h        |   10 +++++-
 3 files changed, 47 insertions(+), 33 deletions(-)
---
diff --git a/modules/engines/pixbuf/pixbuf-draw.c b/modules/engines/pixbuf/pixbuf-draw.c
index 640387e..91405e7 100644
--- a/modules/engines/pixbuf/pixbuf-draw.c
+++ b/modules/engines/pixbuf/pixbuf-draw.c
@@ -132,7 +132,7 @@ draw_simple_image(GtkStyle       *style,
     {
       if (image->background)
 	{
-	  theme_pixbuf_render (image->background,
+	  theme_pixbuf_render_no_cairo (image->background,
 			       window, area,
 			       draw_center ? COMPONENT_ALL : COMPONENT_ALL | COMPONENT_CENTER,
 			       FALSE,
@@ -140,7 +140,7 @@ draw_simple_image(GtkStyle       *style,
 	}
       
       if (image->overlay && draw_center)
-	theme_pixbuf_render (image->overlay,
+	theme_pixbuf_render_no_cairo (image->overlay,
 			     window, area, COMPONENT_ALL,
 			     TRUE, 
 			     x, y, width, height);
@@ -301,19 +301,19 @@ draw_gap_image(GtkStyle       *style,
 	}
 
       if (image->background)
-	theme_pixbuf_render (image->background,
+	theme_pixbuf_render_no_cairo (image->background,
 			     window, area, components, FALSE,
 			     x, y, width, height);
       if (image->gap_start)
-	theme_pixbuf_render (image->gap_start,
+	theme_pixbuf_render_no_cairo (image->gap_start,
 			     window, area, COMPONENT_ALL, FALSE,
 			     r1.x, r1.y, r1.width, r1.height);
       if (image->gap)
-	theme_pixbuf_render (image->gap,
+	theme_pixbuf_render_no_cairo (image->gap,
 			     window, area, COMPONENT_ALL, FALSE,
 			     r2.x, r2.y, r2.width, r2.height);
       if (image->gap_end)
-	theme_pixbuf_render (image->gap_end,
+	theme_pixbuf_render_no_cairo (image->gap_end,
 			     window, area, COMPONENT_ALL, FALSE,
 			     r3.x, r3.y, r3.width, r3.height);
 
@@ -350,7 +350,7 @@ draw_hline (GtkStyle     *style,
   if (image)
     {
       if (image->background)
-	theme_pixbuf_render (image->background,
+	theme_pixbuf_render_no_cairo (image->background,
 			     window, area, COMPONENT_ALL, FALSE,
 			     x1, y, (x2 - x1) + 1, 2);
     }
@@ -386,7 +386,7 @@ draw_vline (GtkStyle     *style,
   if (image)
     {
       if (image->background)
-	theme_pixbuf_render (image->background,
+	theme_pixbuf_render_no_cairo (image->background,
 			     window, area, COMPONENT_ALL, FALSE,
 			     x, y1, 2, (y2 - y1) + 1);
     }
diff --git a/modules/engines/pixbuf/pixbuf-render.c b/modules/engines/pixbuf/pixbuf-render.c
index ce25cfb..30e3fad 100644
--- a/modules/engines/pixbuf/pixbuf-render.c
+++ b/modules/engines/pixbuf/pixbuf-render.c
@@ -352,8 +352,7 @@ replicate_cols (GdkPixbuf    *src,
 static void
 pixbuf_render (GdkPixbuf    *src,
 	       guint         hints,
-	       GdkWindow    *window,
-	       GdkRectangle *clip_rect,
+               cairo_t      *cr,
 	       gint          src_x,
 	       gint          src_y,
 	       gint          src_width,
@@ -381,12 +380,6 @@ pixbuf_render (GdkPixbuf    *src,
   if (hints & THEME_MISSING)
     return;
 
-  if (clip_rect)
-    {
-      if (!gdk_rectangle_intersect (clip_rect, &rect, &rect))
-	return;
-    }
-
   if (dest_width == src_width && dest_height == src_height)
     {
       tmp_pixbuf = g_object_ref (src);
@@ -471,9 +464,6 @@ pixbuf_render (GdkPixbuf    *src,
 
   if (tmp_pixbuf)
     {
-      cairo_t *cr;
-      
-      cr = gdk_cairo_create (window);
       gdk_cairo_set_source_pixbuf (cr, 
                                    tmp_pixbuf,
                                    -x_offset + rect.x, 
@@ -481,7 +471,6 @@ pixbuf_render (GdkPixbuf    *src,
       gdk_cairo_rectangle (cr, &rect);
       cairo_fill (cr);
 
-      cairo_destroy (cr);
       g_object_unref (tmp_pixbuf);
     }
 }
@@ -727,9 +716,33 @@ theme_pixbuf_get_pixbuf (ThemePixbuf *theme_pb)
 }
 
 void
+theme_pixbuf_render_no_cairo (ThemePixbuf  *theme_pb,
+                              GdkWindow    *window,
+                              GdkRectangle *clip_rect,
+                              guint         component_mask,
+                              gboolean      center,
+                              gint          x,
+                              gint          y,
+                              gint          width,
+                              gint          height)
+{
+  cairo_t *cr;
+
+  cr = gdk_cairo_create (window);
+  if (clip_rect)
+    {
+      gdk_cairo_rectangle (cr, clip_rect);
+      cairo_clip (cr);
+    }
+
+  theme_pixbuf_render (theme_pb, cr, 
+                       component_mask, center,
+                       x, y, width, height);
+}
+
+void
 theme_pixbuf_render (ThemePixbuf  *theme_pb,
-		     GdkWindow    *window,
-		     GdkRectangle *clip_rect,
+                     cairo_t      *cr,
 		     guint         component_mask,
 		     gboolean      center,
 		     gint          x,
@@ -785,7 +798,7 @@ theme_pixbuf_render (ThemePixbuf  *theme_pb,
 
 
 #define RENDER_COMPONENT(X1,X2,Y1,Y2)					   \
-        pixbuf_render (pixbuf, theme_pb->hints[Y1][X1], window, clip_rect, \
+        pixbuf_render (pixbuf, theme_pb->hints[Y1][X1], cr,                \
 	 	       src_x[X1], src_y[Y1],				   \
 		       src_x[X2] - src_x[X1], src_y[Y2] - src_y[Y1],	   \
 		       dest_x[X1], dest_y[Y1],				   \
@@ -825,7 +838,7 @@ theme_pixbuf_render (ThemePixbuf  *theme_pb,
 	  x += (width - pixbuf_width) / 2;
 	  y += (height - pixbuf_height) / 2;
 	  
-	  pixbuf_render (pixbuf, 0, window, clip_rect,
+	  pixbuf_render (pixbuf, 0, cr,
 			 0, 0,
 			 pixbuf_width, pixbuf_height,
 			 x, y,
@@ -833,19 +846,12 @@ theme_pixbuf_render (ThemePixbuf  *theme_pb,
 	}
       else
 	{
-          cairo_t *cr = gdk_cairo_create (window);
-
           gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
           cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
 
-	  if (clip_rect)
-	    gdk_cairo_rectangle (cr, clip_rect);
-	  else
-	    cairo_rectangle (cr, x, y, width, height);
+	  cairo_rectangle (cr, x, y, width, height);
 	  
           cairo_fill (cr);
-
-          cairo_destroy (cr);
 	}
     }
 }
diff --git a/modules/engines/pixbuf/pixbuf.h b/modules/engines/pixbuf/pixbuf.h
index 2354d76..9c9c38c 100644
--- a/modules/engines/pixbuf/pixbuf.h
+++ b/modules/engines/pixbuf/pixbuf.h
@@ -200,7 +200,7 @@ G_GNUC_INTERNAL void         theme_pixbuf_set_border   (ThemePixbuf  *theme_pb,
 					gint          bottom);
 G_GNUC_INTERNAL void         theme_pixbuf_set_stretch  (ThemePixbuf  *theme_pb,
 					gboolean      stretch);
-G_GNUC_INTERNAL void         theme_pixbuf_render       (ThemePixbuf  *theme_pb,
+G_GNUC_INTERNAL void         theme_pixbuf_render_no_cairo (ThemePixbuf  *theme_pb,
 					GdkWindow    *window,
 					GdkRectangle *clip_rect,
 					guint         component_mask,
@@ -209,6 +209,14 @@ G_GNUC_INTERNAL void         theme_pixbuf_render       (ThemePixbuf  *theme_pb,
 					gint          dest_y,
 					gint          dest_width,
 					gint          dest_height);
+G_GNUC_INTERNAL void         theme_pixbuf_render       (ThemePixbuf  *theme_pb,
+                                        cairo_t      *cr,
+					guint         component_mask,
+					gboolean      center,
+					gint          dest_x,
+					gint          dest_y,
+					gint          dest_width,
+					gint          dest_height);