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+/* $Xorg: dbestruct.h,v 1.3 2000/08/17 19:48:16 cpqbld Exp $ */
+/******************************************************************************
+ *
+ * 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
+ *
+ *****************************************************************************/
+/* $XFree86$ */
+
+#ifndef DBE_STRUCT_H
+#define DBE_STRUCT_H
+
+
+/* INCLUDES */
+
+#define NEED_DBE_PROTOCOL
+#include <X11/extensions/Xdbeproto.h>
+#include "windowstr.h"
+
+
+/* DEFINES */
+
+#define DBE_SCREEN_PRIV(pScreen) \
+ ((dbeScreenPrivIndex < 0) ? \
+ NULL : \
+ ((DbeScreenPrivPtr)((pScreen)->devPrivates[dbeScreenPrivIndex].ptr)))
+
+#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(pWindow)\
+ ((dbeWindowPrivIndex < 0) ? \
+ NULL : \
+ ((DbeWindowPrivPtr)(pWindow->devPrivates[dbeWindowPrivIndex].ptr)))
+
+/* 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];
+
+ /* Device-specific private information.
+ */
+ DevUnion *devPrivates;
+
+} DbeWindowPrivRec, *DbeWindowPrivPtr;
+
+
+/*
+ ******************************************************************************
+ ** Per-screen data
+ ******************************************************************************
+ */
+
+typedef struct _DbeScreenPrivRec
+{
+ /* Info for creating window privs */
+ int winPrivPrivLen; /* Length of privs in DbeWindowPrivRec */
+ unsigned int *winPrivPrivSizes; /* Array of private record sizes */
+ unsigned int totalWinPrivSize; /* PrivRec + size of all priv priv ptrs */
+
+ /* Resources created by DIX to be used by DDX */
+ RESTYPE dbeDrawableResType;
+ RESTYPE dbeWindowPrivResType;
+
+ /* Private indices created by DIX to be used by DDX */
+ int dbeScreenPrivIndex;
+ int dbeWindowPrivIndex;
+
+ /* 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*/
+);
+ DbeWindowPrivPtr (*AllocWinPriv)(
+ ScreenPtr /*pScreen*/
+);
+ int (*AllocWinPrivPrivIndex)(
+ void
+);
+ Bool (*AllocWinPrivPriv)(
+ ScreenPtr /*pScreen*/,
+ int /*index*/,
+ unsigned /*amount*/
+);
+
+ /* 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 (*BeginIdiom)(
+ ClientPtr /*client*/
+);
+ void (*EndIdiom)(
+ ClientPtr /*client*/
+);
+ void (*WinPrivDelete)(
+ DbeWindowPrivPtr /*pDbeWindowPriv*/,
+ XID /*bufId*/
+);
+ void (*ResetProc)(
+ ScreenPtr /*pScreen*/
+);
+ void (*ValidateBuffer)(
+ WindowPtr /*pWin*/,
+ XID /*bufId*/,
+ Bool /*dstbuffer*/
+);
+
+ /* Device-specific private information.
+ */
+ DevUnion *devPrivates;
+
+} DbeScreenPrivRec, *DbeScreenPrivPtr;
+
+#endif /* DBE_STRUCT_H */