19b8622983
This implements a variation of frustum culling whereby we convert screen space clip rectangles into eye space mini-frustums so that we don't have to repeatedly transform actor paint-volumes all the way into screen coordinates to perform culling, we just have to apply the modelview transform and then determine each points distance from the planes that make up the clip frustum. By avoiding the projective transform, perspective divide and viewport scale for each point culled this makes culling much cheaper.
101 lines
5.8 KiB
C
101 lines
5.8 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) 2010 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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#ifndef __CLUTTER_STAGE_PRIVATE_H__
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#define __CLUTTER_STAGE_PRIVATE_H__
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#include <clutter/clutter-stage-window.h>
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#include <clutter/clutter-stage.h>
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#include <clutter/clutter-input-device.h>
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#include <clutter/clutter-private.h>
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G_BEGIN_DECLS
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typedef struct _ClutterStageQueueRedrawEntry ClutterStageQueueRedrawEntry;
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/* stage */
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ClutterStageWindow *_clutter_stage_get_default_window (void);
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void _clutter_stage_do_paint (ClutterStage *stage,
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const ClutterGeometry *clip);
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void _clutter_stage_set_window (ClutterStage *stage,
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ClutterStageWindow *stage_window);
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ClutterStageWindow *_clutter_stage_get_window (ClutterStage *stage);
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void _clutter_stage_get_projection_matrix (ClutterStage *stage,
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CoglMatrix *projection);
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void _clutter_stage_dirty_projection (ClutterStage *stage);
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void _clutter_stage_set_viewport (ClutterStage *stage,
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float x,
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float y,
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float width,
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float height);
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void _clutter_stage_get_viewport (ClutterStage *stage,
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float *x,
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float *y,
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float *width,
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float *height);
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void _clutter_stage_dirty_viewport (ClutterStage *stage);
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void _clutter_stage_maybe_setup_viewport (ClutterStage *stage);
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void _clutter_stage_maybe_relayout (ClutterActor *stage);
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gboolean _clutter_stage_needs_update (ClutterStage *stage);
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gboolean _clutter_stage_do_update (ClutterStage *stage);
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void _clutter_stage_queue_event (ClutterStage *stage,
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ClutterEvent *event);
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gboolean _clutter_stage_has_queued_events (ClutterStage *stage);
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void _clutter_stage_process_queued_events (ClutterStage *stage);
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void _clutter_stage_update_input_devices (ClutterStage *stage);
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int _clutter_stage_get_pending_swaps (ClutterStage *stage);
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gboolean _clutter_stage_has_full_redraw_queued (ClutterStage *stage);
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void _clutter_stage_set_pick_buffer_valid (ClutterStage *stage,
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gboolean valid,
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ClutterPickMode mode);
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gboolean _clutter_stage_get_pick_buffer_valid (ClutterStage *stage,
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ClutterPickMode mode);
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void _clutter_stage_increment_picks_per_frame_counter (ClutterStage *stage);
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void _clutter_stage_reset_picks_per_frame_counter (ClutterStage *stage);
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guint _clutter_stage_get_picks_per_frame_counter (ClutterStage *stage);
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ClutterPaintVolume *_clutter_stage_paint_volume_stack_allocate (ClutterStage *stage);
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void _clutter_stage_paint_volume_stack_free_all (ClutterStage *stage);
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const ClutterPlane *_clutter_stage_get_clip (ClutterStage *stage);
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ClutterStageQueueRedrawEntry *_clutter_stage_queue_actor_redraw (ClutterStage *stage,
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ClutterStageQueueRedrawEntry *entry,
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ClutterActor *actor,
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ClutterPaintVolume *clip);
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void _clutter_stage_queue_redraw_entry_invalidate (ClutterStageQueueRedrawEntry *entry);
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void _clutter_stage_add_device (ClutterStage *stage,
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ClutterInputDevice *device);
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void _clutter_stage_remove_device (ClutterStage *stage,
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ClutterInputDevice *device);
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gboolean _clutter_stage_has_device (ClutterStage *stage,
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ClutterInputDevice *device);
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void _clutter_stage_set_motion_events_enabled (ClutterStage *stage,
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gboolean enabled);
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gboolean _clutter_stage_get_motion_events_enabled (ClutterStage *stage);
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G_END_DECLS
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#endif /* __CLUTTER_STAGE_PRIVATE_H__ */
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