[gtk+/wip/alexl/broadway4] broadway: Add shadow node

[Alexander Larsson <alexl src gnome org>]

commit f5b01d518a3ae467f54865db895651fa6f96f161
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Nov 22 16:53:15 2017 +0100

    broadway: Add shadow node

 gdk/broadway/broadway-protocol.h |    1 +
 gdk/broadway/broadway.js         |   23 +++++++++++++
 gdk/broadway/broadwayd.c         |   10 ++++-
 gsk/gskbroadwayrenderer.c        |   66 ++++++++++++++++++++++++++-----------
 4 files changed, 78 insertions(+), 22 deletions(-)
---
diff --git a/gdk/broadway/broadway-protocol.h b/gdk/broadway/broadway-protocol.h
index e4ce21e..f1b1504 100644
--- a/gdk/broadway/broadway-protocol.h
+++ b/gdk/broadway/broadway-protocol.h
@@ -17,6 +17,7 @@ typedef enum { /* Sync changes with broadway.js */
   BROADWAY_NODE_INSET_SHADOW = 5,
   BROADWAY_NODE_ROUNDED_CLIP = 6,
   BROADWAY_NODE_LINEAR_GRADIENT = 7,
+  BROADWAY_NODE_SHADOW = 8,
 } BroadwayNodeType;
 
 typedef enum {
diff --git a/gdk/broadway/broadway.js b/gdk/broadway/broadway.js
index dd9ea1c..57565d5 100644
--- a/gdk/broadway/broadway.js
+++ b/gdk/broadway/broadway.js
@@ -592,6 +592,29 @@ SwapNodes.prototype.handle_node = function(parent, offset_x, offset_y)
         }
         break;
 
+    case 8:  // SHADOW
+        {
+            var len = this.decode_uint32();
+            var filters = "";
+            for (var i = 0; i < len; i++) {
+                var color = this.decode_color();
+                var dx = this.decode_float();
+                var dy = this.decode_float();
+                var blur = this.decode_float();
+                filters = filters + "drop-shadow(" + args (px(dx), px(dy), px(blur), color) + ")";
+            }
+            var div = document.createElement('div');
+            div.style["position"] = "absolute";
+            div.style["left"] = px(0);
+            div.style["top"] = px(0);
+            div.style["filter"] = filters;
+
+            parent.appendChild(div);
+            this.handle_node(div, offset_x, offset_y);
+        }
+        break;
+
+
     default:
         alert("Unexpected node type " + type);
     }
diff --git a/gdk/broadway/broadwayd.c b/gdk/broadway/broadwayd.c
index 693e76c..6314ce9 100644
--- a/gdk/broadway/broadwayd.c
+++ b/gdk/broadway/broadwayd.c
@@ -222,13 +222,14 @@ get_client_serial (BroadwayClient *client, guint32 daemon_serial)
 #define NODE_SIZE_RECT (NODE_SIZE_POINT + NODE_SIZE_SIZE)
 #define NODE_SIZE_RRECT (NODE_SIZE_RECT + 4 * NODE_SIZE_SIZE)
 #define NODE_SIZE_COLOR_STOP (NODE_SIZE_FLOAT + NODE_SIZE_COLOR)
+#define NODE_SIZE_SHADOW (NODE_SIZE_COLOR + 3 * NODE_SIZE_FLOAT)
 
 static int
 rewrite_node_textures (BroadwayClient *client,
                        int len, guint32 data[], int pos)
 {
   guint32 type;
-  guint32 i, n_children, n_stops;
+  guint32 i, n_children, n_stops, n_shadows;
 
   g_assert (pos < len);
 
@@ -242,7 +243,7 @@ rewrite_node_textures (BroadwayClient *client,
     break;
   case BROADWAY_NODE_INSET_SHADOW:
   case BROADWAY_NODE_OUTSET_SHADOW:
-    pos += NODE_SIZE_RRECT + NODE_SIZE_COLOR + 4 * NODE_SIZE_COLOR;
+    pos += NODE_SIZE_RRECT + NODE_SIZE_COLOR + 4 * NODE_SIZE_FLOAT;
     break;
   case BROADWAY_NODE_TEXTURE:
     data[pos+4] = GPOINTER_TO_INT (g_hash_table_lookup (client->textures,
@@ -263,6 +264,11 @@ rewrite_node_textures (BroadwayClient *client,
     n_stops = data[pos++];
     pos += n_stops * NODE_SIZE_COLOR_STOP;
     break;
+  case BROADWAY_NODE_SHADOW:
+    n_shadows = data[pos++];
+    pos += n_shadows * NODE_SIZE_SHADOW;
+    pos = rewrite_node_textures (client, len, data, pos);
+    break;
   default:
     g_assert_not_reached ();
   }
diff --git a/gsk/gskbroadwayrenderer.c b/gsk/gskbroadwayrenderer.c
index 07d8d18..49e4f77 100644
--- a/gsk/gskbroadwayrenderer.c
+++ b/gsk/gskbroadwayrenderer.c
@@ -437,32 +437,58 @@ gsk_broadway_renderer_add_node (GskRenderer *self,
       }
       return;
 
-    case GSK_TEXT_NODE:
-    default:
+    case GSK_SHADOW_NODE:
       {
-        GdkTexture *texture;
-        guint32 texture_id;
-        float off_x = 0, off_y = 0;
-
-        texture = node_cache_lookup (node, &off_x, &off_y);
-
-        if (!texture)
+        gsize i, n_shadows = gsk_shadow_node_get_n_shadows (node);
+        add_uint32 (nodes, BROADWAY_NODE_SHADOW);
+        add_uint32 (nodes, n_shadows);
+        for (i = 0; i < n_shadows; i++)
           {
-            texture = node_texture_fallback (node, &off_x, &off_y);
-            node_cache_store (node, texture, off_x, off_y);
+            const GskShadow *shadow = gsk_shadow_node_peek_shadow (node, i);
+            add_rgba (nodes, &shadow->color);
+            add_float (nodes, shadow->dx);
+            add_float (nodes, shadow->dy);
+            add_float (nodes, shadow->radius);
           }
-
-        g_ptr_array_add (node_textures, texture); /* Transfers ownership to node_textures */
-        texture_id = gdk_broadway_display_ensure_texture (display, texture);
-        add_uint32 (nodes, BROADWAY_NODE_TEXTURE);
-        add_float (nodes, node->bounds.origin.x + off_x);
-        add_float (nodes, node->bounds.origin.y + off_y);
-        add_float (nodes, gdk_texture_get_width (texture));
-        add_float (nodes, gdk_texture_get_height (texture));
-        add_uint32 (nodes, texture_id);
+        gsk_broadway_renderer_add_node (self, nodes, node_textures,
+                                        gsk_shadow_node_get_child (node));
       }
       return;
+
+    case GSK_TEXT_NODE:
+    default:
+      break; /* Fallback */
     }
+
+  {
+    GdkTexture *texture;
+    guint32 texture_id;
+    float off_x = 0, off_y = 0;
+
+    texture = node_cache_lookup (node, &off_x, &off_y);
+
+    if (!texture)
+      {
+        texture = node_texture_fallback (node, &off_x, &off_y);
+        g_print ("Fallback %p for %s\n", texture, node->node_class->type_name);
+
+        node_cache_store (node, texture, off_x, off_y);
+      }
+    else
+      {
+        g_print ("Cache hit %p for %s\n", texture,
+                 node->node_class->type_name);
+      }
+
+    g_ptr_array_add (node_textures, texture); /* Transfers ownership to node_textures */
+    texture_id = gdk_broadway_display_ensure_texture (display, texture);
+    add_uint32 (nodes, BROADWAY_NODE_TEXTURE);
+    add_float (nodes, node->bounds.origin.x + off_x);
+    add_float (nodes, node->bounds.origin.y + off_y);
+    add_float (nodes, gdk_texture_get_width (texture));
+    add_float (nodes, gdk_texture_get_height (texture));
+    add_uint32 (nodes, texture_id);
+  }
 }
 
 static void