mirror of
https://github.com/brl/mutter.git
synced 2024-09-20 14:35:48 -04:00
0c8eb904c0
Previously we tracked whether the clip stack needs flushing as part of the CoglClipState which is part of the CoglFramebuffer state. This is a bit odd because most of the clipping state (such as the clip planes and the scissor) are part of the GL context's state rather than the framebuffer. We were marking the clip state on the framebuffer dirty every time we change the framebuffer anyway so it seems to make more sense to have the dirtiness be part of the global context. Instead of a just a single boolean to record whether the state needs flushing, the CoglContext now holds a reference to the clip stack that was flushed. That way we can flush arbitrary stack states and if it happens to be the same as the state already flushed then Cogl will do nothing. This will be useful if we log the clip stack in the journal because then we will need to flush unrelated clip stack states for each batch.
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_CLIP_STATE_H
|
|
#define __COGL_CLIP_STATE_H
|
|
|
|
typedef struct _CoglClipState CoglClipState;
|
|
|
|
struct _CoglClipState
|
|
{
|
|
/* Stack of CoglClipStacks */
|
|
GSList *stacks;
|
|
};
|
|
|
|
void
|
|
_cogl_clip_state_init (CoglClipState *state);
|
|
|
|
void
|
|
_cogl_clip_state_destroy (CoglClipState *state);
|
|
|
|
void
|
|
_cogl_clip_state_flush (CoglClipState *clip_state);
|
|
|
|
/*
|
|
* _cogl_get_clip_stack:
|
|
*
|
|
* Gets a pointer to the current clip stack. This can be used to later
|
|
* return to the same clip stack state with _cogl_set_clip_stack(). A
|
|
* reference is not taken on the stack so if you want to keep it you
|
|
* should call _cogl_clip_stack_ref().
|
|
*
|
|
* Return value: a pointer to the current clip stack.
|
|
*/
|
|
CoglClipStack *
|
|
_cogl_get_clip_stack (void);
|
|
|
|
/*
|
|
* _cogl_set_clip_stack:
|
|
* @stack: a pointer to the replacement clip stack
|
|
*
|
|
* Replaces the current clip stack with @stack.
|
|
*/
|
|
void
|
|
_cogl_set_clip_stack (CoglClipStack *stack);
|
|
|
|
#endif /* __COGL_CLIP_STATE_H */
|