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/******************************************************************************
*
* Copyright (c) 1994, 1995 Hewlett-Packard Company
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL HEWLETT-PACKARD COMPANY BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of the Hewlett-Packard
* Company shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the Hewlett-Packard Company.
*
* Header file for DIX-related DBE
*
*****************************************************************************/
#ifndef DBE_STRUCT_H
#define DBE_STRUCT_H
/* INCLUDES */
#define NEED_DBE_PROTOCOL
#include <X11/extensions/dbeproto.h>
#include "windowstr.h"
#include "privates.h"
typedef struct {
VisualID visual; /* one visual ID that supports double-buffering */
int depth; /* depth of visual in bits */
int perflevel; /* performance level of visual */
} XdbeVisualInfo;
typedef struct {
int count; /* number of items in visual_depth */
XdbeVisualInfo *visinfo; /* list of visuals & depths for scrn */
} XdbeScreenVisualInfo;
/* DEFINES */
#define DBE_SCREEN_PRIV(pScreen) ((DbeScreenPrivPtr) \
dixLookupPrivate(&(pScreen)->devPrivates, dbeScreenPrivKey))
#define DBE_SCREEN_PRIV_FROM_DRAWABLE(pDrawable) \
DBE_SCREEN_PRIV((pDrawable)->pScreen)
#define DBE_SCREEN_PRIV_FROM_WINDOW_PRIV(pDbeWindowPriv) \
DBE_SCREEN_PRIV((pDbeWindowPriv)->pWindow->drawable.pScreen)
#define DBE_SCREEN_PRIV_FROM_WINDOW(pWindow) \
DBE_SCREEN_PRIV((pWindow)->drawable.pScreen)
#define DBE_SCREEN_PRIV_FROM_PIXMAP(pPixmap) \
DBE_SCREEN_PRIV((pPixmap)->drawable.pScreen)
#define DBE_SCREEN_PRIV_FROM_GC(pGC)\
DBE_SCREEN_PRIV((pGC)->pScreen)
#define DBE_WINDOW_PRIV(pWin) ((DbeWindowPrivPtr) \
dixLookupPrivate(&(pWin)->devPrivates, dbeWindowPrivKey))
/* Initial size of the buffer ID array in the window priv. */
#define DBE_INIT_MAX_IDS 2
/* Reallocation increment for the buffer ID array. */
#define DBE_INCR_MAX_IDS 4
/* Marker for free elements in the buffer ID array. */
#define DBE_FREE_ID_ELEMENT 0
/* TYPEDEFS */
/* Record used to pass swap information between DIX and DDX swapping
* procedures.
*/
typedef struct _DbeSwapInfoRec {
WindowPtr pWindow;
unsigned char swapAction;
} DbeSwapInfoRec, *DbeSwapInfoPtr;
/*
******************************************************************************
** Per-window data
******************************************************************************
*/
typedef struct _DbeWindowPrivRec {
/* A pointer to the window with which the DBE window private (buffer) is
* associated.
*/
WindowPtr pWindow;
/* Last known swap action for this buffer. Legal values for this field
* are XdbeUndefined, XdbeBackground, XdbeUntouched, and XdbeCopied.
*/
unsigned char swapAction;
/* Last known buffer size.
*/
unsigned short width, height;
/* Coordinates used for static gravity when the window is positioned.
*/
short x, y;
/* Number of XIDs associated with this buffer.
*/
int nBufferIDs;
/* Capacity of the current buffer ID array, IDs. */
int maxAvailableIDs;
/* Pointer to the array of buffer IDs. This initially points to initIDs.
* When the static limit of the initIDs array is reached, the array is
* reallocated and this pointer is set to the new array instead of initIDs.
*/
XID *IDs;
/* Initial array of buffer IDs. We are defining the XID array within the
* window priv to optimize for data locality. In most cases, only one
* buffer will be associated with a window. Having the array declared
* here can prevent us from accessing the data in another memory page,
* possibly resulting in a page swap and loss of performance. Initially we
* will use this array to store buffer IDs. For situations where we have
* more IDs than can fit in this static array, we will allocate a larger
* array to use, possibly suffering a performance loss.
*/
XID initIDs[DBE_INIT_MAX_IDS];
/* Pointer to a drawable that contains the contents of the back buffer.
*/
PixmapPtr pBackBuffer;
/* Pointer to a drawable that contains the contents of the front buffer.
* This pointer is only used for the XdbeUntouched swap action. For that
* swap action, we need to copy the front buffer (window) contents into
* this drawable, copy the contents of current back buffer drawable (the
* back buffer) into the window, swap the front and back drawable pointers,
* and then swap the drawable/resource associations in the resource
* database.
*/
PixmapPtr pFrontBuffer;
/* Device-specific private information.
*/
PrivateRec *devPrivates;
} DbeWindowPrivRec, *DbeWindowPrivPtr;
/*
******************************************************************************
** Per-screen data
******************************************************************************
*/
typedef struct _DbeScreenPrivRec {
/* Wrapped functions
* It is the responsibilty of the DDX layer to wrap PositionWindow().
* DbeExtensionInit wraps DestroyWindow().
*/
PositionWindowProcPtr PositionWindow;
DestroyWindowProcPtr DestroyWindow;
/* Per-screen DIX routines */
Bool (*SetupBackgroundPainter) (WindowPtr /*pWin */ ,
GCPtr /*pGC */
);
/* Per-screen DDX routines */
Bool (*GetVisualInfo) (ScreenPtr /*pScreen */ ,
XdbeScreenVisualInfo * /*pVisInfo */
);
int (*AllocBackBufferName) (WindowPtr /*pWin */ ,
XID /*bufId */ ,
int /*swapAction */
);
int (*SwapBuffers) (ClientPtr /*client */ ,
int * /*pNumWindows */ ,
DbeSwapInfoPtr /*swapInfo */
);
void (*WinPrivDelete) (DbeWindowPrivPtr /*pDbeWindowPriv */ ,
XID /*bufId */
);
} DbeScreenPrivRec, *DbeScreenPrivPtr;
#endif /* DBE_STRUCT_H */
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