49c8d42317
When painting, actors rely on semi global state tracked by the state to get various things needed for painting, such as the current draw framebuffer. Having state hidden in such ways can be very deceiving as it's hard to follow changes spread out, and adding more and more state that should be tracked during a paint gets annoying as they will not change in isolation but one by one in their own places. To do this better, introduce a paint context that is passed along in paint calls that contains the necessary state needed during painting. The paint context implements a framebuffer stack just as Cogl works, which is currently needed for offscreen rendering used by clutter. The same context is passed around for paint nodes, contents and effects as well. In this commit, the context is only introduced, but not used. It aims to replace the Cogl framebuffer stack, and will allow actors to know what view it is currently painted on. https://gitlab.gnome.org/GNOME/mutter/merge_requests/935
149 lines
5.3 KiB
C
149 lines
5.3 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2011 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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#ifndef __CLUTTER_PAINT_NODE_PRIVATE_H__
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#define __CLUTTER_PAINT_NODE_PRIVATE_H__
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#include <glib-object.h>
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#include <json-glib/json-glib.h>
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#include <clutter/clutter-paint-context.h>
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#include <clutter/clutter-paint-node.h>
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G_BEGIN_DECLS
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#define CLUTTER_PAINT_NODE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_PAINT_NODE, ClutterPaintNodeClass))
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#define CLUTTER_IS_PAINT_NODE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_PAINT_NODE))
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#define CLUTTER_PAINT_NODE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_PAINT_NODE, ClutterPaintNodeClass))
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typedef struct _ClutterPaintOperation ClutterPaintOperation;
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struct _ClutterPaintNode
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{
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GTypeInstance parent_instance;
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ClutterPaintNode *parent;
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ClutterPaintNode *first_child;
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ClutterPaintNode *prev_sibling;
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ClutterPaintNode *next_sibling;
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ClutterPaintNode *last_child;
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guint n_children;
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GArray *operations;
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gchar *name;
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volatile int ref_count;
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};
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struct _ClutterPaintNodeClass
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{
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GTypeClass base_class;
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void (* finalize) (ClutterPaintNode *node);
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gboolean (* pre_draw) (ClutterPaintNode *node,
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ClutterPaintContext *paint_context);
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void (* draw) (ClutterPaintNode *node,
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ClutterPaintContext *paint_context);
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void (* post_draw) (ClutterPaintNode *node,
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ClutterPaintContext *paint_context);
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JsonNode*(* serialize) (ClutterPaintNode *node);
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CoglFramebuffer *(* get_framebuffer) (ClutterPaintNode *node);
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};
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#define PAINT_OP_INIT { PAINT_OP_INVALID }
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typedef enum
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{
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PAINT_OP_INVALID = 0,
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PAINT_OP_TEX_RECT,
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PAINT_OP_MULTITEX_RECT,
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PAINT_OP_PATH,
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PAINT_OP_PRIMITIVE
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} PaintOpCode;
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struct _ClutterPaintOperation
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{
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PaintOpCode opcode;
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GArray *multitex_coords;
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union {
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float texrect[8];
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CoglPath *path;
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CoglPrimitive *primitive;
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} op;
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};
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GType _clutter_transform_node_get_type (void) G_GNUC_CONST;
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GType _clutter_dummy_node_get_type (void) G_GNUC_CONST;
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void _clutter_paint_operation_paint_rectangle (const ClutterPaintOperation *op);
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void _clutter_paint_operation_clip_rectangle (const ClutterPaintOperation *op);
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void _clutter_paint_operation_paint_path (const ClutterPaintOperation *op);
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void _clutter_paint_operation_clip_path (const ClutterPaintOperation *op);
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void _clutter_paint_operation_paint_primitive (const ClutterPaintOperation *op);
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void _clutter_paint_node_init_types (void);
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gpointer _clutter_paint_node_create (GType gtype);
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ClutterPaintNode * _clutter_transform_node_new (const CoglMatrix *matrix);
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ClutterPaintNode * _clutter_dummy_node_new (ClutterActor *actor);
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void _clutter_paint_node_dump_tree (ClutterPaintNode *root);
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G_GNUC_INTERNAL
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void clutter_paint_node_remove_child (ClutterPaintNode *node,
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ClutterPaintNode *child);
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G_GNUC_INTERNAL
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void clutter_paint_node_replace_child (ClutterPaintNode *node,
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ClutterPaintNode *old_child,
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ClutterPaintNode *new_child);
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G_GNUC_INTERNAL
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void clutter_paint_node_remove_all (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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guint clutter_paint_node_get_n_children (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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ClutterPaintNode * clutter_paint_node_get_first_child (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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ClutterPaintNode * clutter_paint_node_get_previous_sibling (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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ClutterPaintNode * clutter_paint_node_get_next_sibling (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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ClutterPaintNode * clutter_paint_node_get_last_child (ClutterPaintNode *node);
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G_GNUC_INTERNAL
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ClutterPaintNode * clutter_paint_node_get_parent (ClutterPaintNode *node);
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G_END_DECLS
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#endif /* __CLUTTER_PAINT_NODE_PRIVATE_H__ */
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