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/*
* $XFree86: xc/programs/Xserver/miext/layer/layer.h,v 1.5 2002/10/03 22:50:21 keithp Exp $
*
* Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _LAYER_H_
#define _LAYER_H_
#include <shadow.h>
#define LAYER_FB 0
#define LAYER_SHADOW 1
typedef struct _LayerKind *LayerKindPtr;
typedef struct _LayerWin *LayerWinPtr;
typedef struct _LayerList *LayerListPtr;
typedef struct _LayerGC *LayerGCPtr;
typedef struct _Layer *LayerPtr;
typedef struct _LayerScreen *LayerScreenPtr;
/*
* We'll try to work without a list of windows in each layer
* for now, this will make computing bounding boxes for each
* layer rather expensive, so that may need to change at some point.
*/
#define LAYER_SCREEN_PIXMAP ((PixmapPtr) 1)
typedef struct _Layer {
LayerPtr pNext; /* a list of all layers for this screen */
LayerKindPtr pKind; /* characteristics of this layer */
int refcnt; /* reference count, layer is freed when zero */
int windows; /* number of windows, free pixmap when zero */
int depth; /* window depth in this layer */
PixmapPtr pPixmap; /* pixmap for this layer (may be frame buffer) */
Bool freePixmap; /* whether to free this pixmap when done */
RegionRec region; /* valid set of pPixmap for drawing */
ShadowUpdateProc update; /* for shadow layers, update/window/closure values */
ShadowWindowProc window;
int randr;
void *closure;
} LayerRec;
/*
* Call this before wrapping stuff for acceleration, it
* gives layer pointers to the raw frame buffer functions
*/
Bool
LayerStartInit (ScreenPtr pScreen);
/*
* Initialize wrappers for each acceleration type and
* call this function, it will move the needed functions
* into a new LayerKind and replace them with the generic
* functions.
*/
int
LayerNewKind (ScreenPtr pScreen);
/*
* Finally, call this function and layer
* will wrap the screen functions and prepare for execution
*/
Bool
LayerFinishInit (ScreenPtr pScreen);
/*
* At any point after LayerStartInit, a new layer can be created.
*/
LayerPtr
LayerCreate (ScreenPtr pScreen,
int kind,
int depth,
PixmapPtr pPixmap,
ShadowUpdateProc update,
ShadowWindowProc window,
int randr,
void *closure);
/*
* Create a layer pixmap
*/
Bool
LayerCreatePixmap (ScreenPtr pScreen, LayerPtr pLayer);
/*
* Change a layer pixmap
*/
void
LayerSetPixmap (ScreenPtr pScreen, LayerPtr pLayer, PixmapPtr pPixmap);
/*
* Destroy a layer pixmap
*/
void
LayerDestroyPixmap (ScreenPtr pScreen, LayerPtr pLayer);
/*
* Change a layer kind
*/
void
LayerSetKind (ScreenPtr pScreen, LayerPtr pLayer, int kind);
/*
* Destroy a layer. The layer must not contain any windows.
*/
void
LayerDestroy (ScreenPtr pScreen, LayerPtr layer);
/*
* Add a window to a layer
*/
Bool
LayerWindowAdd (ScreenPtr pScreen, LayerPtr pLayer, WindowPtr pWin);
/*
* Remove a window from a layer
*/
void
LayerWindowRemove (ScreenPtr pScreen, LayerPtr pLayer, WindowPtr pWin);
#endif /* _LAYER_H_ */
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