[gtk+] style: Apply same matrix conversion as gdk_draw_layout() did

[Benjamin Otte <otte src gnome org>]

commit ccacd3a46aa5e3a5c50841bc86a007b4cf8bca2d
Author: Benjamin Otte <otte redhat com>
Date:   Sat Aug 7 02:14:10 2010 +0200

    style: Apply same matrix conversion as gdk_draw_layout() did
    
    This is only necessary for GtkLabel with an angle set as no other widget
    rotates text.
    Note that the label code does not need these adjustments as those paths
    are only taken when the label is not rotated.

 gtk/gtkstyle.c |   32 ++++++++++++++++++++++++++++++--
 1 files changed, 30 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkstyle.c b/gtk/gtkstyle.c
index 9b615d4..853aa8b 100644
--- a/gtk/gtkstyle.c
+++ b/gtk/gtkstyle.c
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <gobject/gvaluecollector.h>
 #include "gtkmarshalers.h"
+#include "gtkpango.h"
 #include "gtkrc.h"
 #include "gtkspinbutton.h"
 #include "gtkstyle.h"
@@ -4191,6 +4192,7 @@ gtk_default_draw_layout (GtkStyle        *style,
 {
   cairo_t *cr;
   GdkColor *gc;
+  const PangoMatrix *matrix;
 
   cr = gdk_cairo_create (window);
 
@@ -4200,17 +4202,43 @@ gtk_default_draw_layout (GtkStyle        *style,
       cairo_clip (cr);
     }
 
+  matrix = pango_context_get_matrix (pango_layout_get_context (layout));
+  if (matrix)
+    {
+      cairo_matrix_t cairo_matrix;
+      PangoMatrix tmp_matrix;
+      PangoRectangle rect;
+      
+      cairo_matrix_init (&cairo_matrix,
+                         matrix->xx, matrix->yx,
+                         matrix->xy, matrix->yy,
+                         matrix->x0, matrix->y0);
+
+      pango_layout_get_extents (layout, NULL, &rect);
+      pango_matrix_transform_rectangle (matrix, &rect);
+      pango_extents_to_pixels (&rect, NULL);
+                                          
+      tmp_matrix = *matrix;
+      cairo_matrix.x0 += x - rect.x;
+      cairo_matrix.y0 += y - rect.y;
+
+      cairo_set_matrix (cr, &cairo_matrix);
+    }
+  else
+    cairo_translate (cr, x, y);
+
   if (state_type == GTK_STATE_INSENSITIVE)
     {
+      cairo_save (cr);
       gdk_cairo_set_source_color (cr, &style->white);
-      cairo_move_to (cr, x + 1, y + 1);
+      cairo_move_to (cr, 1, 1);
       pango_cairo_layout_path (cr, layout);
       cairo_fill (cr);
+      cairo_restore (cr);
     }
 
   gc = use_text ? &style->text[state_type] : &style->fg[state_type];
 
-  cairo_move_to (cr, x, y);
   gdk_cairo_set_source_color (cr, gc);
 
   pango_cairo_show_layout (cr, layout);