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clutter/paint-nodes: Expose ClutterRootNode

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The ClutterRootNode paint node is theoretically the
top-most node of a paint nodes tree, except that we
are not in the point of having full rendering trees
in Clutter (all rendering performed by paint nodes
is still local and immediate).

When controlling the rendering tree, MetaShapedTexture
may need to paint into an offscreen framebuffer under
some circumstations.

Expose ClutterRootNode so that MetaShapedTexture can
use it to render to offscreen framebuffers.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/405
This commit is contained in:
Georges Basile Stavracas Neto 2019-01-29 12:46:08 -02:00
parent 02b184bfd7
commit b63e104561
4 changed files with 27 additions and 14 deletions
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2
clutter/clutter/clutter-actor.c
View File

@ -3740,7 +3740,7 @@ clutter_actor_paint_node (ClutterActor *actor,
if (!clutter_stage_get_no_clear_hint (CLUTTER_STAGE (actor)))
clear_flags |= COGL_BUFFER_BIT_COLOR;
node = _clutter_root_node_new (fb, &bg_color, clear_flags);
node = clutter_root_node_new (fb, &bg_color, clear_flags);
clutter_paint_node_set_name (node, "stageClear");
clutter_paint_node_add_rectangle (node, &box);
clutter_paint_node_add_child (root, node);

4
clutter/clutter/clutter-paint-node-private.h
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@ -97,7 +97,6 @@ struct _ClutterPaintOperation
} op;
};
GType _clutter_root_node_get_type (void) G_GNUC_CONST;
GType _clutter_transform_node_get_type (void) G_GNUC_CONST;
GType _clutter_dummy_node_get_type (void) G_GNUC_CONST;
@ -110,9 +109,6 @@ void _clutter_paint_operation_paint_primitive (const C
void _clutter_paint_node_init_types (void);
gpointer _clutter_paint_node_create (GType gtype);
ClutterPaintNode * _clutter_root_node_new (CoglFramebuffer *framebuffer,
const ClutterColor *clear_color,
CoglBufferBit clear_flags);
ClutterPaintNode * _clutter_transform_node_new (const CoglMatrix *matrix);
ClutterPaintNode * _clutter_dummy_node_new (ClutterActor *actor);

11
clutter/clutter/clutter-paint-nodes.c
View File

@ -83,16 +83,13 @@ _clutter_paint_node_init_types (void)
}
/*
* Root node, private
* Root node
*
* any frame can only have a since RootNode instance for each
* top-level actor.
*/
#define clutter_root_node_get_type _clutter_root_node_get_type
typedef struct _ClutterRootNode ClutterRootNode;
typedef struct _ClutterPaintNodeClass ClutterRootNodeClass;
#define clutter_root_node_get_type clutter_root_node_get_type
struct _ClutterRootNode
{
@ -158,13 +155,13 @@ clutter_root_node_init (ClutterRootNode *self)
}
ClutterPaintNode *
_clutter_root_node_new (CoglFramebuffer *framebuffer,
clutter_root_node_new (CoglFramebuffer *framebuffer,
const ClutterColor *clear_color,
CoglBufferBit clear_flags)
{
ClutterRootNode *res;
res = _clutter_paint_node_create (_clutter_root_node_get_type ());
res = _clutter_paint_node_create (CLUTTER_TYPE_ROOT_NODE);
cogl_color_init_from_4ub (&res->clear_color,
clear_color->red,

20
clutter/clutter/clutter-paint-nodes.h
View File

@ -143,6 +143,26 @@ CLUTTER_EXPORT
ClutterPaintNode * clutter_text_node_new (PangoLayout *layout,
const ClutterColor *color);
#define CLUTTER_TYPE_ROOT_NODE (clutter_root_node_get_type ())
#define CLUTTER_ROOT_NODE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_ROOT_NODE, ClutterRootNode))
#define CLUTTER_IS_ROOT_NODE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_ROOT_NODE))
/**
* ClutterRootNode:
*
* The #ClutterRootNode structure is an opaque
* type whose members cannot be directly accessed.
*/
typedef struct _ClutterRootNode ClutterRootNode;
typedef struct _ClutterPaintNodeClass ClutterRootNodeClass;
CLUTTER_EXPORT
GType clutter_root_node_get_type (void) G_GNUC_CONST;
CLUTTER_EXPORT
ClutterPaintNode * clutter_root_node_new (CoglFramebuffer *framebuffer,
const ClutterColor *clear_color,
CoglBufferBit clear_flags);
G_END_DECLS
#endif /* __CLUTTER_PAINT_NODES_H__ */