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
114 lines
5.3 KiB
C
114 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_H__
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#define __CLUTTER_PAINT_NODE_H__
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#include <cogl/cogl.h>
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#include <clutter/clutter-types.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_PAINT_NODE (clutter_paint_node_get_type ())
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#define CLUTTER_PAINT_NODE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_PAINT_NODE, ClutterPaintNode))
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#define CLUTTER_IS_PAINT_NODE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_PAINT_NODE))
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typedef struct _ClutterPaintNodePrivate ClutterPaintNodePrivate;
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typedef struct _ClutterPaintNodeClass ClutterPaintNodeClass;
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CLUTTER_EXPORT
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GType clutter_paint_node_get_type (void) G_GNUC_CONST;
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CLUTTER_EXPORT
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ClutterPaintNode * clutter_paint_node_ref (ClutterPaintNode *node);
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CLUTTER_EXPORT
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void clutter_paint_node_unref (ClutterPaintNode *node);
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CLUTTER_EXPORT
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void clutter_paint_node_paint (ClutterPaintNode *node,
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ClutterPaintContext *paint_context);
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CLUTTER_EXPORT
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void clutter_paint_node_set_name (ClutterPaintNode *node,
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const char *name);
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CLUTTER_EXPORT
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CoglFramebuffer * clutter_paint_node_get_framebuffer (ClutterPaintNode *node);
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CLUTTER_EXPORT
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void clutter_paint_node_add_child (ClutterPaintNode *node,
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ClutterPaintNode *child);
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CLUTTER_EXPORT
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void clutter_paint_node_add_rectangle (ClutterPaintNode *node,
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const ClutterActorBox *rect);
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CLUTTER_EXPORT
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void clutter_paint_node_add_texture_rectangle (ClutterPaintNode *node,
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const ClutterActorBox *rect,
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float x_1,
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float y_1,
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float x_2,
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float y_2);
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CLUTTER_EXPORT
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void clutter_paint_node_add_multitexture_rectangle (ClutterPaintNode *node,
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const ClutterActorBox *rect,
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const float *text_coords,
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unsigned int text_coords_len);
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CLUTTER_EXPORT
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void clutter_paint_node_add_path (ClutterPaintNode *node,
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CoglPath *path);
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CLUTTER_EXPORT
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void clutter_paint_node_add_primitive (ClutterPaintNode *node,
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CoglPrimitive *primitive);
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/**
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* CLUTTER_VALUE_HOLDS_PAINT_NODE:
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* @value: a #GValue
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*
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* Evaluates to %TRUE if the @value has been initialized to hold
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* a #ClutterPaintNode.
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*
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* Since: 1.10
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*/
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#define CLUTTER_VALUE_HOLDS_PAINT_NODE(value) (G_VALUE_HOLDS (value, CLUTTER_TYPE_PAINT_NODE))
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CLUTTER_EXPORT
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void clutter_value_set_paint_node (GValue *value,
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gpointer node);
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CLUTTER_EXPORT
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void clutter_value_take_paint_node (GValue *value,
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gpointer node);
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CLUTTER_EXPORT
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gpointer clutter_value_get_paint_node (const GValue *value);
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CLUTTER_EXPORT
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gpointer clutter_value_dup_paint_node (const GValue *value);
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G_END_DECLS
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#endif /* __CLUTTER_PAINT_NODE_H__ */
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