[gtk+/rendering-cleanup: 94/95] style: Apply same matrix conversion as gdk_draw_layout() did

[Benjamin Otte <otte src gnome org>]

commit d5ebea0884c53895b31462c35e135822a08a810b
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 0783427..12f4f07 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"
@@ -4188,6 +4189,7 @@ gtk_default_draw_layout (GtkStyle        *style,
 {
   cairo_t *cr;
   GdkColor *gc;
+  const PangoMatrix *matrix;
 
   cr = gdk_cairo_create (window);
 
@@ -4197,17 +4199,43 @@ 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);