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clutter/paint-nodes: Expose and cleanup ClutterTransformNode
It will also be used by ClutterActor to apply it's own transform to the paint node tree, and thus preserve it's rendering area. https://gitlab.gnome.org/GNOME/mutter/merge_requests/872
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@ -183,35 +183,31 @@ clutter_root_node_new (CoglFramebuffer *framebuffer,
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}
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/*
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* Transform node
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*
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* A private PaintNode, that changes the modelview of its child
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* nodes.
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* ClutterTransformNode
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*/
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#define clutter_transform_node_get_type _clutter_transform_node_get_type
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typedef struct _ClutterTransformNode {
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struct _ClutterTransformNode
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{
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ClutterPaintNode parent_instance;
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CoglMatrix modelview;
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} ClutterTransformNode;
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CoglMatrix transform;
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};
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typedef struct _ClutterPaintNodeClass ClutterTransformNodeClass;
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struct _ClutterTransformNodeClass
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{
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ClutterPaintNodeClass parent_class;
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};
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G_DEFINE_TYPE (ClutterTransformNode, clutter_transform_node, CLUTTER_TYPE_PAINT_NODE)
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static gboolean
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clutter_transform_node_pre_draw (ClutterPaintNode *node)
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{
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ClutterTransformNode *tnode = (ClutterTransformNode *) node;
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CoglMatrix matrix;
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ClutterTransformNode *transform_node = (ClutterTransformNode *) node;
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CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
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cogl_push_matrix ();
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cogl_get_modelview_matrix (&matrix);
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cogl_matrix_multiply (&matrix, &matrix, &tnode->modelview);
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cogl_set_modelview_matrix (&matrix);
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cogl_framebuffer_push_matrix (fb);
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cogl_framebuffer_transform (fb, &transform_node->transform);
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return TRUE;
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}
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@ -219,7 +215,9 @@ clutter_transform_node_pre_draw (ClutterPaintNode *node)
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static void
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clutter_transform_node_post_draw (ClutterPaintNode *node)
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{
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cogl_pop_matrix ();
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CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
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cogl_framebuffer_pop_matrix (fb);
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}
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static void
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@ -235,18 +233,24 @@ clutter_transform_node_class_init (ClutterTransformNodeClass *klass)
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static void
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clutter_transform_node_init (ClutterTransformNode *self)
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{
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cogl_matrix_init_identity (&self->modelview);
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cogl_matrix_init_identity (&self->transform);
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}
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/*
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* clutter_transform_node_new:
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* @transform: (nullable): the transform matrix to apply
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*
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* Return value: (transfer full): the newly created #ClutterTransformNode.
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* Use clutter_paint_node_unref() when done.
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*/
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ClutterPaintNode *
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_clutter_transform_node_new (const CoglMatrix *modelview)
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clutter_transform_node_new (const CoglMatrix *transform)
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{
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ClutterTransformNode *res;
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res = _clutter_paint_node_create (_clutter_transform_node_get_type ());
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if (modelview != NULL)
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res->modelview = *modelview;
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res = _clutter_paint_node_create (CLUTTER_TYPE_TRANSFORM_NODE);
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if (transform)
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res->transform = *transform;
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return (ClutterPaintNode *) res;
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}
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@ -190,6 +190,26 @@ ClutterPaintNode * clutter_layer_node_new (const CoglMatrix
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guint8 opacity);
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#define CLUTTER_TYPE_TRANSFORM_NODE (clutter_transform_node_get_type ())
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#define CLUTTER_TRANSFORM_NODE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_TRANSFORM_NODE, ClutterTransformNode))
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#define CLUTTER_IS_TRANSFORM_NODE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_TRANSFORM_NODE))
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/*
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* ClutterTransformNode:
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*
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* The #ClutterLayerNode structure is an opaque
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* type whose members cannot be directly accessed.
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*
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* Since: 1.10
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*/
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typedef struct _ClutterTransformNode ClutterTransformNode;
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typedef struct _ClutterPaintNodeClass ClutterTransformNodeClass;
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CLUTTER_EXPORT
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GType clutter_transform_node_get_type (void) G_GNUC_CONST;
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CLUTTER_EXPORT
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ClutterPaintNode * clutter_transform_node_new (const CoglMatrix *projection);
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G_END_DECLS
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