add MetaImageFillType and implement TILE in addition to the existing SCALE

2002-05-31  Havoc Pennington  <hp@redhat.com>

	* src/theme.c: add MetaImageFillType and implement TILE in
	addition to the existing SCALE

	* src/theme.h (struct _MetaDrawOp): remove no-longer-used "alpha"
	field

4 files changed, 148 insertions, 16 deletions

diff --git a/ChangeLog b/ChangeLog
index 35b01b25..4096a9fb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,13 @@
 2002-05-31  Havoc Pennington  <hp@redhat.com>
 
+	* src/theme.c: add MetaImageFillType and implement TILE in
+	addition to the existing SCALE
+
+	* src/theme.h (struct _MetaDrawOp): remove no-longer-used "alpha"
+	field
+
+2002-05-31  Havoc Pennington  <hp@redhat.com>
+
 	* src/theme.c (multiply_alpha): now just uses
 	meta_gradient_add_alpha
 	(draw_op_as_pixbuf): implement alpha gradients for tint, gradient,
diff --git a/src/theme-parser.c b/src/theme-parser.c
index 0a1ba225..ba686f95 100644
--- a/src/theme-parser.c
+++ b/src/theme-parser.c
@@ -2149,9 +2149,11 @@ parse_draw_op_element (GMarkupParseContext  *context,
       const char *height;
       const char *alpha;
       const char *colorize;
+      const char *fill_type;
       MetaAlphaGradientSpec *alpha_spec;
       GdkPixbuf *pixbuf;
       MetaColorSpec *colorize_spec = NULL;
+      MetaImageFillType fill_type_val;
       
       if (!locate_attributes (context, element_name, attribute_names, attribute_values,
                               error,
@@ -2159,6 +2161,7 @@ parse_draw_op_element (GMarkupParseContext  *context,
                               "width", &width, "height", &height,
                               "alpha", &alpha, "filename", &filename,
 			      "colorize", &colorize,
+                              "fill_type", &fill_type,
                               NULL))
         return;
       
@@ -2209,6 +2212,19 @@ parse_draw_op_element (GMarkupParseContext  *context,
       if (!check_expression (height, TRUE, info->theme, context, error))
         return;
 
+      fill_type_val = META_IMAGE_FILL_SCALE;
+      if (fill_type)
+        {
+          fill_type_val = meta_image_fill_type_from_string (fill_type);
+
+          if (((int) fill_type_val) == -1)
+            {
+              set_error (error, context, G_MARKUP_ERROR,
+                         G_MARKUP_ERROR_PARSE,
+                         _("Did not understand fill type \"%s\" for <%s> element"),
+                         fill_type, element_name);
+            }
+        }
       
       /* Check last so we don't have to free it when other
        * stuff fails
@@ -2249,7 +2265,8 @@ parse_draw_op_element (GMarkupParseContext  *context,
       op->data.image.width = optimize_expression (info->theme, width);
       op->data.image.height = optimize_expression (info->theme, height);
       op->data.image.alpha_spec = alpha_spec;
-
+      op->data.image.fill_type = fill_type_val;
+      
       g_assert (info->op_list);
       
       meta_draw_op_list_append (info->op_list, op);
@@ -2589,13 +2606,16 @@ parse_draw_op_element (GMarkupParseContext  *context,
       const char *width;
       const char *height;
       const char *alpha;
+      const char *fill_type;
       MetaAlphaGradientSpec *alpha_spec;
+      MetaImageFillType fill_type_val;
       
       if (!locate_attributes (context, element_name, attribute_names, attribute_values,
                               error,
                               "x", &x, "y", &y,
                               "width", &width, "height", &height,
                               "alpha", &alpha,
+                              "fill_type", &fill_type,
                               NULL))
         return;
       
@@ -2639,6 +2659,20 @@ parse_draw_op_element (GMarkupParseContext  *context,
       if (!check_expression (height, FALSE, info->theme, context, error))
         return;
 
+      fill_type_val = META_IMAGE_FILL_SCALE;
+      if (fill_type)
+        {
+          fill_type_val = meta_image_fill_type_from_string (fill_type);
+
+          if (((int) fill_type_val) == -1)
+            {
+              set_error (error, context, G_MARKUP_ERROR,
+                         G_MARKUP_ERROR_PARSE,
+                         _("Did not understand fill type \"%s\" for <%s> element"),
+                         fill_type, element_name);
+            }
+        }
+      
       alpha_spec = NULL;
       if (alpha && !parse_alpha (alpha, &alpha_spec, context, error))
         return;
@@ -2650,7 +2684,8 @@ parse_draw_op_element (GMarkupParseContext  *context,
       op->data.icon.width = optimize_expression (info->theme, width);
       op->data.icon.height = optimize_expression (info->theme, height);
       op->data.icon.alpha_spec = alpha_spec;
-
+      op->data.icon.fill_type = fill_type_val;
+      
       g_assert (info->op_list);
       
       meta_draw_op_list_append (info->op_list, op);
diff --git a/src/theme.c b/src/theme.c
index ac6f411c..0d1816d0 100644
--- a/src/theme.c
+++ b/src/theme.c
@@ -2582,8 +2582,52 @@ render_pixbuf (GdkDrawable        *drawable,
 }
 
 static GdkPixbuf*
+pixbuf_tile (GdkPixbuf *tile,
+             int        width,
+             int        height)
+{
+  GdkPixbuf *pixbuf;
+  int tile_width;
+  int tile_height;
+  int i, j;
+  
+  tile_width = gdk_pixbuf_get_width (tile);
+  tile_height = gdk_pixbuf_get_height (tile);
+  
+  pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+                           gdk_pixbuf_get_has_alpha (tile),
+                           8, width, height);
+
+  i = 0;
+  while (i < width)
+    {
+      j = 0;
+      while (j < height)
+        {
+          int w, h;
+
+          w = MIN (tile_width, width - i);
+          h = MIN (tile_height, height - j);
+          
+          gdk_pixbuf_copy_area (tile,
+                                0, 0,
+                                w, h,
+                                pixbuf,
+                                i, j);
+
+          j += tile_height;
+        }
+      
+      i += tile_width;
+    }
+  
+  return pixbuf;
+}
+
+static GdkPixbuf*
 scale_and_alpha_pixbuf (GdkPixbuf             *src,
                         MetaAlphaGradientSpec *alpha_spec,
+                        MetaImageFillType      fill_type,
                         int                    width,
                         int                    height)
 {
@@ -2599,19 +2643,27 @@ scale_and_alpha_pixbuf (GdkPixbuf             *src,
     }
   else
     {
-      if (gdk_pixbuf_get_width (pixbuf) == width ||
-	  gdk_pixbuf_get_height (pixbuf) == height)
-	{
-	  pixbuf = gdk_pixbuf_scale_simple (pixbuf,
-					    width, height,
-					    GDK_INTERP_NEAREST);
-	}
-      else
-	{
-	  pixbuf = gdk_pixbuf_scale_simple (pixbuf,
-					    width, height,
-					    GDK_INTERP_BILINEAR);
-	}
+      switch (fill_type)
+        {
+        case META_IMAGE_FILL_SCALE:
+          if (gdk_pixbuf_get_width (pixbuf) == width ||
+              gdk_pixbuf_get_height (pixbuf) == height)
+            {
+              pixbuf = gdk_pixbuf_scale_simple (pixbuf,
+                                                width, height,
+                                                GDK_INTERP_NEAREST);
+            }
+          else
+            {
+              pixbuf = gdk_pixbuf_scale_simple (pixbuf,
+                                                width, height,
+                                                GDK_INTERP_BILINEAR);
+            }
+          break;
+        case META_IMAGE_FILL_TILE:
+          pixbuf = pixbuf_tile (pixbuf, width, height);
+          break;
+        }
     }
 
   if (pixbuf)
@@ -2749,6 +2801,7 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
               {
                 pixbuf = scale_and_alpha_pixbuf (op->data.image.colorize_cache_pixbuf,
                                                  op->data.image.alpha_spec,
+                                                 op->data.image.fill_type,
                                                  width, height);
               }
 	  }
@@ -2756,6 +2809,7 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
 	  {
 	    pixbuf = scale_and_alpha_pixbuf (op->data.image.pixbuf,
 					     op->data.image.alpha_spec,
+                                             op->data.image.fill_type,
 					     width, height);
 	  }
         break;
@@ -2772,10 +2826,12 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
           height <= gdk_pixbuf_get_height (info->mini_icon))
         pixbuf = scale_and_alpha_pixbuf (info->mini_icon,
                                          op->data.icon.alpha_spec,
+                                         op->data.image.fill_type,
                                          width, height);
       else if (info->icon)
         pixbuf = scale_and_alpha_pixbuf (info->icon,
                                          op->data.icon.alpha_spec,
+                                         op->data.image.fill_type,
                                          width, height);
       break;
 
@@ -5247,6 +5303,30 @@ meta_gtk_arrow_to_string (GtkArrowType arrow)
   return "<unknown>";
 }
 
+MetaImageFillType
+meta_image_fill_type_from_string (const char *str)
+{
+  if (strcmp ("tile", str) == 0)
+    return META_IMAGE_FILL_TILE;
+  else if (strcmp ("scale", str) == 0)
+    return META_IMAGE_FILL_SCALE;
+  else
+    return -1;
+}
+
+const char*
+meta_image_fill_type_to_string (MetaImageFillType fill_type)
+{
+  switch (fill_type)
+    {
+    case META_IMAGE_FILL_TILE:
+      return "tile";
+    case META_IMAGE_FILL_SCALE:
+      return "scale";
+    }
+  
+  return "<unknown>";
+}
 
 #if 0
 /* These are some functions I'm saving to use in optimizing
diff --git a/src/theme.h b/src/theme.h
index f93157a2..d7584737 100644
--- a/src/theme.h
+++ b/src/theme.h
@@ -123,6 +123,11 @@ struct _MetaFrameGeometry
   guint bottom_right_corner_rounded : 1;
 };
 
+typedef enum
+{
+  META_IMAGE_FILL_SCALE, /* default, needs to be all-bits-zero for g_new0 */
+  META_IMAGE_FILL_TILE
+} MetaImageFillType;
 
 typedef enum
 {
@@ -284,13 +289,13 @@ struct _MetaDrawOp
       MetaColorSpec *colorize_spec;
       MetaAlphaGradientSpec *alpha_spec;
       GdkPixbuf *pixbuf;
-      double alpha;
       char *x;
       char *y;
       char *width;
       char *height;
       guint32 colorize_cache_pixel;
       GdkPixbuf *colorize_cache_pixbuf;
+      MetaImageFillType fill_type;
     } image;
     
     struct {
@@ -326,6 +331,7 @@ struct _MetaDrawOp
       char *y;
       char *width;
       char *height;
+      MetaImageFillType fill_type;
     } icon;
 
     struct {
@@ -800,5 +806,8 @@ GtkShadowType         meta_gtk_shadow_from_string      (const char            *s
 const char*           meta_gtk_shadow_to_string        (GtkShadowType          shadow);
 GtkArrowType          meta_gtk_arrow_from_string       (const char            *str);
 const char*           meta_gtk_arrow_to_string         (GtkArrowType           arrow);
+MetaImageFillType     meta_image_fill_type_from_string (const char            *str);
+const char*           meta_image_fill_type_to_string   (MetaImageFillType      fill_type);
+
 
 #endif