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mutter/cogl/cogl-clip-state.h

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Separate out CoglClipStackState from cogl-clip-stack.c CoglClipStackState has now been renamed to CoglClipState and is moved to a separate file. CoglClipStack now just maintains a stack and doesn't worry about the rest of the state. CoglClipStack sill contains the code to flush the stack to GL.
2010-04-14 18:41:08 +00:00
/*
* 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
build: cogl-clip-state.h depends on cogl-clip-stack.h This adds a #include "cogl-clip-stack.h" to cogl-clip-state.h which depends on the CoglClipStack typedef.
2010-11-16 08:38:59 +00:00
#include "cogl-clip-stack.h"
Separate out CoglClipStackState from cogl-clip-stack.c CoglClipStackState has now been renamed to CoglClipState and is moved to a separate file. CoglClipStack now just maintains a stack and doesn't worry about the rest of the state. CoglClipStack sill contains the code to flush the stack to GL.
2010-04-14 18:41:08 +00:00
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-clip-stack: Don't allocate a separate struct for CoglClipStack Instead of having a separate CoglHandle for CoglClipStack the code is now expected to directly hold a pointer to the top entry on the stack. The empty stack is then the NULL pointer. This saves an allocation when we want to copy the stack because we can just take a reference on a stack entry. The idea is that this will make it possible to store the clip stack in the journal without any extra allocations. The _cogl_get_clip_stack and set functions now take a CoglClipStack pointer instead of a handle so it would no longer make sense to make them public. However I think the only reason we would have wanted that in the first place would be to save the clip state between switching FBOs and that is no longer necessary.
2010-11-01 19:52:45 +00:00
CoglClipStack *
clip: rename get_clip_stack + add framebuffer_get_stack Instead of having _cogl_get/set_clip stack which reference the global CoglContext this instead makes those into CoglClipState method functions named _cogl_clip_state_get/set_stack that take an explicit pointer to a CoglClipState. This also adds _cogl_framebuffer_get/set_clip_stack convenience functions that avoid having to first get the ClipState from a framebuffer then the stack from that - so we can maintain the convenience of _cogl_get_clip_stack.
2011-01-12 19:30:30 +00:00
_cogl_clip_state_get_stack (CoglClipState *clip_state);
cogl: Implement retained clip stacks This adds three new internal API functions which can be used to retain the clip stack state and restore it later: _cogl_get_clip_stack _cogl_set_clip_stack _cogl_clip_stack_copy The functions are currently internal and not yet used but we may want to make them public in future to replace the cogl_clip_stack_save() and cogl_clip_stack_restore() APIs. The get function just returns the handle to the clip stack at the top of the stack of stacks and the set function just replaces it. The copy function makes a cheap copy of an existing stack by taking a reference to the top stack entry. This ends up working like a deep copy because there is no way to modify entries of a stack but it doesn't actually copy the data.
2010-04-15 09:58:28 +00:00
void
clip: rename get_clip_stack + add framebuffer_get_stack Instead of having _cogl_get/set_clip stack which reference the global CoglContext this instead makes those into CoglClipState method functions named _cogl_clip_state_get/set_stack that take an explicit pointer to a CoglClipState. This also adds _cogl_framebuffer_get/set_clip_stack convenience functions that avoid having to first get the ClipState from a framebuffer then the stack from that - so we can maintain the convenience of _cogl_get_clip_stack.
2011-01-12 19:30:30 +00:00
_cogl_clip_state_set_stack (CoglClipState *clip_state,
CoglClipStack *clip_stack);
cogl: Implement retained clip stacks This adds three new internal API functions which can be used to retain the clip stack state and restore it later: _cogl_get_clip_stack _cogl_set_clip_stack _cogl_clip_stack_copy The functions are currently internal and not yet used but we may want to make them public in future to replace the cogl_clip_stack_save() and cogl_clip_stack_restore() APIs. The get function just returns the handle to the clip stack at the top of the stack of stacks and the set function just replaces it. The copy function makes a cheap copy of an existing stack by taking a reference to the top stack entry. This ends up working like a deep copy because there is no way to modify entries of a stack but it doesn't actually copy the data.
2010-04-15 09:58:28 +00:00
Separate out CoglClipStackState from cogl-clip-stack.c CoglClipStackState has now been renamed to CoglClipState and is moved to a separate file. CoglClipStack now just maintains a stack and doesn't worry about the rest of the state. CoglClipStack sill contains the code to flush the stack to GL.
2010-04-14 18:41:08 +00:00
#endif /* __COGL_CLIP_STATE_H */
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