st-private: Receive a CoglFramebuffer

Same case of the previous patch; _st_paint_shadow_with_opacity()
uses cogl_get_draw_framebuffer(), and this patch makes it receive
a CoglFramebuffer as a parameter instead.

The cautious reader might notice that this commit apparently goes
against the long-term goal, for it introduces more instances of
cogl_get_draw_framebuffer(). This is not wrong, but these introduced
ones will be removed later on, when ClutterActor.paint() receives
a CoglFramebuffer as a parameter instead.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/283

src/st/st-entry.c

@@ -869,6 +869,7 @@ st_entry_paint (ClutterActor *actor)
 
       if (priv->text_shadow_material != NULL)
         _st_paint_shadow_with_opacity (shadow_spec,
+                                       cogl_get_draw_framebuffer (),
                                        priv->text_shadow_material,
                                        &allocation,
                                        clutter_actor_get_paint_opacity (priv->entry));

src/st/st-icon.c

@@ -176,6 +176,7 @@ st_icon_paint (ClutterActor *actor)
 
           clutter_actor_get_allocation_box (priv->icon_texture, &allocation);
           _st_paint_shadow_with_opacity (priv->shadow_spec,
+                                         cogl_get_draw_framebuffer (),
                                          priv->shadow_pipeline,
                                          &allocation,
                                          clutter_actor_get_paint_opacity (priv->icon_texture));

src/st/st-label.c

@@ -216,6 +216,7 @@ st_label_paint (ClutterActor *actor)
 
       if (priv->text_shadow_pipeline != NULL)
         _st_paint_shadow_with_opacity (shadow_spec,
+                                       cogl_get_draw_framebuffer (),
                                        priv->text_shadow_pipeline,
                                        &allocation,
                                        clutter_actor_get_paint_opacity (priv->label));

src/st/st-private.c

@@ -658,11 +658,11 @@ _st_create_shadow_cairo_pattern (StShadow        *shadow_spec,
 
 void
 _st_paint_shadow_with_opacity (StShadow        *shadow_spec,
+                               CoglFramebuffer *framebuffer,
                                CoglPipeline    *shadow_pipeline,
                                ClutterActorBox *box,
                                guint8           paint_opacity)
 {
-  CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
   ClutterActorBox shadow_box;
   CoglColor color;
 
@@ -678,7 +678,8 @@ _st_paint_shadow_with_opacity (StShadow        *shadow_spec,
                             shadow_spec->color.alpha * paint_opacity / 255);
   cogl_color_premultiply (&color);
   cogl_pipeline_set_layer_combine_constant (shadow_pipeline, 0, &color);
-  cogl_framebuffer_draw_rectangle (fb, shadow_pipeline,
+  cogl_framebuffer_draw_rectangle (framebuffer,
+                                   shadow_pipeline,
                                    shadow_box.x1, shadow_box.y1,
                                    shadow_box.x2, shadow_box.y2);
 }

src/st/st-private.h

@@ -70,6 +70,7 @@ cairo_pattern_t *_st_create_shadow_cairo_pattern (StShadow        *shadow_spec,
                                                   cairo_pattern_t *src_pattern);
 
 void _st_paint_shadow_with_opacity (StShadow        *shadow_spec,
+                                    CoglFramebuffer *framebuffer,
                                     CoglPipeline    *shadow_pipeline,
                                     ClutterActorBox *box,
                                     guint8           paint_opacity);

src/st/st-shadow.c

@@ -288,6 +288,7 @@ st_shadow_helper_paint (StShadowHelper  *helper,
                         guint8           paint_opacity)
 {
   _st_paint_shadow_with_opacity (helper->shadow,
+                                 cogl_get_draw_framebuffer (),
                                  helper->pipeline,
                                  actor_box,
                                  paint_opacity);

src/st/st-theme-node-drawing.c

@@ -2564,6 +2564,7 @@ st_theme_node_paint (StThemeNode           *node,
       if (state->alloc_width < node->box_shadow_min_width ||
           state->alloc_height < node->box_shadow_min_height)
         _st_paint_shadow_with_opacity (node->box_shadow,
+                                       framebuffer,
                                        state->box_shadow_pipeline,
                                        &allocation,
                                        paint_opacity);
@@ -2637,6 +2638,7 @@ st_theme_node_paint (StThemeNode           *node,
        */
       if (node->background_shadow_pipeline != NULL)
         _st_paint_shadow_with_opacity (node->background_image_shadow,
+                                       framebuffer,
                                        node->background_shadow_pipeline,
                                        &background_box,
                                        paint_opacity);