From 762a534d081f7ab06beb9b6850a30823275b0a0b Mon Sep 17 00:00:00 2001
From: Thomas James Alexander Thurman <tthurman@src.gnome.org>
Date: Tue, 27 Jun 2006 02:35:38 +0000
Subject: #151261

---
 src/frames.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++---------
 src/theme.c  |  6 ++++++
 src/theme.h  |  4 ++++
 3 files changed, 57 insertions(+), 9 deletions(-)

diff --git a/src/frames.c b/src/frames.c
index 9f45f1dc..267b5975 100644
--- a/src/frames.c
+++ b/src/frames.c
@@ -2336,16 +2336,54 @@ static void
 meta_frames_set_window_background (MetaFrames   *frames,
                                    MetaUIFrame  *frame)
 {
-  gtk_style_set_background (GTK_WIDGET (frames)->style,
-                            frame->window, GTK_STATE_NORMAL);
+  MetaFrameFlags flags;
+  MetaFrameType type;
+  MetaFrameStyle *style;
 
-#if 0
-  /* This is what we want for transparent background */
-  {
-    col.pixel = 0;
-    gdk_window_set_background (window, &col);
-  }
-#endif
+  /* FIXME: These two lines are executed three times in different places,
+   * once here and once in each meta_core_get_frame_*.
+   */
+  MetaDisplay *display = meta_display_for_x_display (gdk_display);
+  MetaWindow *window = meta_display_lookup_x_window (display, frame->xwindow);
+
+  if (window != NULL)
+    {
+      flags = meta_core_get_frame_flags (gdk_display, frame->xwindow);
+      type = meta_core_get_frame_type (gdk_display, frame->xwindow);
+      style = meta_theme_get_frame_style (meta_theme_get_current (),
+                                          type, flags);
+    }
+
+  if (window == NULL || style->window_background_color == NULL)
+    {
+      gtk_style_set_background (GTK_WIDGET (frames)->style,
+                                frame->window, GTK_STATE_NORMAL);
+    }
+  else
+    {
+      GdkColor color;
+      GdkVisual *visual;
+
+      meta_color_spec_render (style->window_background_color,
+                              GTK_WIDGET (frames),
+                              &color);
+
+      /* Fill in color.pixel */
+
+      gdk_rgb_find_color (gtk_widget_get_colormap (GTK_WIDGET (frames)),
+                          &color);
+
+      /* Set A in ARGB to window_background_alpha, if we have ARGB */
+
+      visual = gtk_widget_get_visual (GTK_WIDGET (frames));
+      if (visual->depth == 32) /* we have ARGB */
+        {
+          color.pixel = (color.pixel & 0xffffff) &
+            style->window_background_alpha << 24;
+        }
+
+      gdk_window_set_background (frame->window, &color);
+    }
 }
 
 static gboolean
diff --git a/src/theme.c b/src/theme.c
index 37f05172..44776335 100644
--- a/src/theme.c
+++ b/src/theme.c
@@ -3786,6 +3786,9 @@ meta_frame_style_new (MetaFrameStyle *parent)
 
   style->refcount = 1;
 
+  /* Default alpha is fully opaque */
+  style->window_background_alpha = 255;
+
   style->parent = parent;
   if (parent)
     meta_frame_style_ref (parent);
@@ -3833,6 +3836,9 @@ meta_frame_style_unref (MetaFrameStyle *style)
       if (style->layout)
         meta_frame_layout_unref (style->layout);
 
+      if (style->window_background_color)
+        meta_color_spec_free (style->window_background_color);
+
       /* we hold a reference to any parent style */
       if (style->parent)
         meta_frame_style_unref (style->parent);
diff --git a/src/theme.h b/src/theme.h
index 78441e4f..66d16d25 100644
--- a/src/theme.h
+++ b/src/theme.h
@@ -504,6 +504,9 @@ struct _MetaFrameStyle
   MetaDrawOpList *buttons[META_BUTTON_TYPE_LAST][META_BUTTON_STATE_LAST];
   MetaDrawOpList *pieces[META_FRAME_PIECE_LAST];
   MetaFrameLayout *layout;
+  MetaColorSpec *window_background_color; /* can be NULL to use the standard
+                                             GTK theme engine */
+  guint8 window_background_alpha; /* 0=transparent; 255=opaque */
 };
 
 /* Kinds of frame...
@@ -871,5 +874,6 @@ guint meta_theme_earliest_version_with_button (MetaButtonType type);
 #define META_THEME_DEGREES_IN_ARCS 2
 #define META_THEME_HIDDEN_BUTTONS 2
 #define META_THEME_COLOR_CONSTANTS 2
+#define META_THEME_FRAME_BACKGROUNDS 2
 
 #endif
-- 
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