[gtk+/wip/css: 114/154] theme: Apply background merging code

[Benjamin Otte <otte src gnome org>]

commit 3f1e176bba52d4258669ee1a9ac5a198ab6e951f
Author: Benjamin Otte <otte redhat com>
Date:   Mon Jan 2 23:23:20 2012 +0100

    theme: Apply background merging code
    
    It was unused and untested and did not do at all what the CSS spec says.

 gtk/gtkthemingbackground.c |  184 --------------------------------------------
 1 files changed, 0 insertions(+), 184 deletions(-)
---
diff --git a/gtk/gtkthemingbackground.c b/gtk/gtkthemingbackground.c
index 9e21110..2a00228 100644
--- a/gtk/gtkthemingbackground.c
+++ b/gtk/gtkthemingbackground.c
@@ -40,189 +40,6 @@ _gtk_theming_background_apply_window_background (GtkThemingBackground *bg,
 }
 
 static void
-_gtk_theming_background_apply_running_transformation (GtkThemingBackground *bg,
-                                                      cairo_t              *cr)
-{
-  gboolean running;
-  gdouble progress;
-  cairo_pattern_t *other_pattern;
-  GtkStateFlags other_flags;
-  GdkRGBA other_bg;
-  cairo_pattern_t *new_pattern = NULL;
-
-  running = gtk_theming_engine_state_is_running (bg->engine, GTK_STATE_PRELIGHT, &progress);
-
-  if (!running)
-    return;
-
-  if (bg->flags & GTK_STATE_FLAG_PRELIGHT)
-    {
-      other_flags = bg->flags & ~(GTK_STATE_FLAG_PRELIGHT);
-      progress = 1 - progress;
-    }
-  else
-    other_flags = bg->flags | GTK_STATE_FLAG_PRELIGHT;
-
-  gtk_theming_engine_get_background_color (bg->engine, other_flags, &other_bg);
-  gtk_theming_engine_get (bg->engine, other_flags,
-                          "background-image", &other_pattern,
-                          NULL);
-
-  if (bg->pattern && other_pattern)
-    {
-      cairo_pattern_type_t type, other_type;
-      gint n0, n1;
-
-      cairo_pattern_get_color_stop_count (bg->pattern, &n0);
-      cairo_pattern_get_color_stop_count (other_pattern, &n1);
-      type = cairo_pattern_get_type (bg->pattern);
-      other_type = cairo_pattern_get_type (other_pattern);
-
-      if (type == other_type && n0 == n1)
-        {
-          gdouble offset0, red0, green0, blue0, alpha0;
-          gdouble offset1, red1, green1, blue1, alpha1;
-          gdouble x00, x01, y00, y01, x10, x11, y10, y11;
-          gdouble r00, r01, r10, r11;
-          guint i;
-
-          if (type == CAIRO_PATTERN_TYPE_LINEAR)
-            {
-              cairo_pattern_get_linear_points (bg->pattern, &x00, &y00, &x01, &y01);
-              cairo_pattern_get_linear_points (other_pattern, &x10, &y10, &x11, &y11);
-
-              new_pattern = cairo_pattern_create_linear (x00 + (x10 - x00) * progress,
-                                                         y00 + (y10 - y00) * progress,
-                                                         x01 + (x11 - x01) * progress,
-                                                         y01 + (y11 - y01) * progress);
-            }
-          else
-            {
-              cairo_pattern_get_radial_circles (bg->pattern, &x00, &y00, &r00, &x01, &y01, &r01);
-              cairo_pattern_get_radial_circles (other_pattern, &x10, &y10, &r10, &x11, &y11, &r11);
-
-              new_pattern = cairo_pattern_create_radial (x00 + (x10 - x00) * progress,
-                                                         y00 + (y10 - y00) * progress,
-                                                         r00 + (r10 - r00) * progress,
-                                                         x01 + (x11 - x01) * progress,
-                                                         y01 + (y11 - y01) * progress,
-                                                         r01 + (r11 - r01) * progress);
-            }
-
-          cairo_pattern_set_filter (new_pattern, CAIRO_FILTER_FAST);
-          i = 0;
-
-          /* Blend both gradients into one */
-          while (i < n0 && i < n1)
-            {
-              cairo_pattern_get_color_stop_rgba (bg->pattern, i,
-                                                 &offset0,
-                                                 &red0, &green0, &blue0,
-                                                 &alpha0);
-              cairo_pattern_get_color_stop_rgba (other_pattern, i,
-                                                 &offset1,
-                                                 &red1, &green1, &blue1,
-                                                 &alpha1);
-
-              cairo_pattern_add_color_stop_rgba (new_pattern,
-                                                 offset0 + ((offset1 - offset0) * progress),
-                                                 red0 + ((red1 - red0) * progress),
-                                                 green0 + ((green1 - green0) * progress),
-                                                 blue0 + ((blue1 - blue0) * progress),
-                                                 alpha0 + ((alpha1 - alpha0) * progress));
-              i++;
-            }
-        }
-      else
-        {
-          cairo_save (cr);
-
-          cairo_rectangle (cr, 0, 0, bg->paint_area.width, bg->paint_area.height);
-          cairo_clip (cr);
-
-          cairo_push_group (cr);
-
-          cairo_scale (cr, bg->paint_area.width, bg->paint_area.height);
-          cairo_set_source (cr, other_pattern);
-          cairo_paint_with_alpha (cr, progress);
-          cairo_set_source (cr, bg->pattern);
-          cairo_paint_with_alpha (cr, 1.0 - progress);
-
-          new_pattern = cairo_pop_group (cr);
-
-          cairo_restore (cr);
-        }
-    }
-  else if (bg->pattern || other_pattern)
-    {
-      cairo_pattern_t *p;
-      const GdkRGBA *c;
-      gdouble x0, y0, x1, y1, r0, r1;
-      gint n, i;
-
-      /* Blend a pattern with a color */
-      if (bg->pattern)
-        {
-          p = bg->pattern;
-          c = &other_bg;
-          progress = 1 - progress;
-        }
-      else
-        {
-          p = other_pattern;
-          c = &bg->bg_color;
-        }
-
-      if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR)
-        {
-          cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1);
-          new_pattern = cairo_pattern_create_linear (x0, y0, x1, y1);
-        }
-      else
-        {
-          cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1);
-          new_pattern = cairo_pattern_create_radial (x0, y0, r0, x1, y1, r1);
-        }
-
-      cairo_pattern_get_color_stop_count (p, &n);
-
-      for (i = 0; i < n; i++)
-        {
-          gdouble red1, green1, blue1, alpha1;
-          gdouble offset;
-
-          cairo_pattern_get_color_stop_rgba (p, i,
-                                             &offset,
-                                             &red1, &green1, &blue1,
-                                             &alpha1);
-          cairo_pattern_add_color_stop_rgba (new_pattern, offset,
-                                             c->red + ((red1 - c->red) * progress),
-                                             c->green + ((green1 - c->green) * progress),
-                                             c->blue + ((blue1 - c->blue) * progress),
-                                             c->alpha + ((alpha1 - c->alpha) * progress));
-        }
-    }
-  else
-    {
-      /* Merge just colors */
-      new_pattern = cairo_pattern_create_rgba (CLAMP (bg->bg_color.red + ((other_bg.red - bg->bg_color.red) * progress), 0, 1),
-                                               CLAMP (bg->bg_color.green + ((other_bg.green - bg->bg_color.green) * progress), 0, 1),
-                                               CLAMP (bg->bg_color.blue + ((other_bg.blue - bg->bg_color.blue) * progress), 0, 1),
-                                               CLAMP (bg->bg_color.alpha + ((other_bg.alpha - bg->bg_color.alpha) * progress), 0, 1));
-    }
-
-  if (new_pattern)
-    {
-      /* Replace pattern to use */
-      cairo_pattern_destroy (bg->pattern);
-      bg->pattern = new_pattern;
-    }
-
-  if (other_pattern)
-    cairo_pattern_destroy (other_pattern);
-}
-
-static void
 _gtk_theming_background_apply_origin (GtkThemingBackground *bg)
 {
   GtkCssArea origin;
@@ -424,7 +241,6 @@ _gtk_theming_background_render (GtkThemingBackground *bg,
   cairo_translate (cr, bg->paint_area.x, bg->paint_area.y);
 
   _gtk_theming_background_apply_window_background (bg, cr);
-  _gtk_theming_background_apply_running_transformation (bg, cr);
   _gtk_theming_background_paint (bg, cr);
   _gtk_theming_background_apply_shadow (bg, cr);