b83dc6abfa
Now that we have a proper scene graph API, we should split out the rendering part from the logical and event handling part. ClutterPaintNode is a lightweight fundamental type that encodes only the paint operations: pipeline state and geometry. At its most simple, is a way to structure setting up the programmable pipeline using a CoglPipeline, and submitting Cogl primitives. The important take away from this API is that you are not allowed to call Cogl API like cogl_set_source() or cogl_primitive_draw() directly. The interesting approach to this is that, in the future, we should be able to move to a purely retained mode: we will decide which actors need to be painted, they will update their own branch of the render graph, and we'll take the render graph and build all the rendering commands from that. For the 1.x API, we will have to maintain invariants and the existing behaviour, but as soon as we can break API, the old paint signal will just go away, and Actors will only be allowed to manipulate the render tree.
116 lines
4.0 KiB
C
116 lines
4.0 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 <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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void (* draw) (ClutterPaintNode *node);
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void (* post_draw) (ClutterPaintNode *node);
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};
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typedef enum {
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PAINT_OP_INVALID = 0,
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PAINT_OP_TEX_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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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_root_node_get_type (void) G_GNUC_CONST;
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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_internal (GType gtype);
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ClutterPaintNode * _clutter_root_node_new (CoglFramebuffer *framebuffer,
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const ClutterColor *clear_color,
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CoglBufferBit clear_flags,
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const CoglMatrix *matrix);
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ClutterPaintNode * _clutter_transform_node_new (const CoglMatrix *matrix);
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ClutterPaintNode * _clutter_dummy_node_new (void);
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void _clutter_paint_node_paint (ClutterPaintNode *root);
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void _clutter_paint_node_dump_tree (ClutterPaintNode *root);
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G_END_DECLS
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#endif /* __CLUTTER_PAINT_NODE_PRIVATE_H__ */
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