xserver/mi/mipointer.h

/*

Copyright 1989, 1998  The Open Group

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.

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 THE
OPEN GROUP 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 Open Group 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 Open Group.
*/

#ifndef MIPOINTER_H
#define MIPOINTER_H

#include "cursor.h"
#include "input.h"
#include "privates.h"

typedef struct _miPointerSpriteFuncRec {
    Bool (*RealizeCursor) (DeviceIntPtr /* pDev */ ,
                           ScreenPtr /* pScr */ ,
                           CursorPtr    /* pCurs */
        );
    Bool (*UnrealizeCursor) (DeviceIntPtr /* pDev */ ,
                             ScreenPtr /* pScr */ ,
                             CursorPtr  /* pCurs */
        );
    void (*SetCursor) (DeviceIntPtr /* pDev */ ,
                       ScreenPtr /* pScr */ ,
                       CursorPtr /* pCurs */ ,
                       int /* x */ ,
                       int      /* y */
        );
    void (*MoveCursor) (DeviceIntPtr /* pDev */ ,
                        ScreenPtr /* pScr */ ,
                        int /* x */ ,
                        int     /* y */
        );
    Bool (*DeviceCursorInitialize) (DeviceIntPtr /* pDev */ ,
                                    ScreenPtr   /* pScr */
        );
    void (*DeviceCursorCleanup) (DeviceIntPtr /* pDev */ ,
                                 ScreenPtr      /* pScr */
        );
} miPointerSpriteFuncRec, *miPointerSpriteFuncPtr;

typedef struct _miPointerScreenFuncRec {
    Bool (*CursorOffScreen) (ScreenPtr * /* ppScr */ ,
                             int * /* px */ ,
                             int *      /* py */
        );
    void (*CrossScreen) (ScreenPtr /* pScr */ ,
                         int    /* entering */
        );
    void (*WarpCursor) (DeviceIntPtr /*pDev */ ,
                        ScreenPtr /* pScr */ ,
                        int /* x */ ,
                        int     /* y */
        );
} miPointerScreenFuncRec, *miPointerScreenFuncPtr;

extern _X_EXPORT Bool miDCInitialize(ScreenPtr /*pScreen */ ,
                                     miPointerScreenFuncPtr     /*screenFuncs */
    );

extern _X_EXPORT ScreenPtr
miPointerGetScreen(DeviceIntPtr pDev);

/* Returns the current cursor position. */
extern _X_EXPORT void
miPointerGetPosition(DeviceIntPtr pDev, int *x, int *y);

/* Moves the cursor to the specified position.  May clip the coordinates:
 * x and y are modified in-place. */
extern _X_EXPORT ScreenPtr
miPointerSetPosition(DeviceIntPtr pDev, int mode, double *x, double *y,
                     int *nevents, InternalEvent *events);

extern _X_EXPORT DevPrivateKeyRec miPointerScreenKeyRec;

#define miPointerScreenKey (&miPointerScreenKeyRec)

/**
 * @brief initialize pointer cursor with custom handling
 *
 * For DDX'es that need their own handling of pointer cursors,
 * and can't use the generic "soft cursor" that's created via
 * miDCInitialize().
 *
 * That can be the case on certain video HW with it's own sprite support,
 * or on remote display protocols like RDP, where the client get the cursor
 * pixmaps sent over the wire and is responsible for painting it on his side.
 *
 * Overwrites ScreenPtr vectors:
 *
 *     ConstrainCursor, CursorLimits, DisplayCursor, RealizeCursor,
 *     UnrealizeCursor, SetCursorPosition, RecolorCursor, DeviceCursorCleanup
 *     DeviceCursorInitialize
 *
 * Hooks to ScreenPtr vectors: CloseScreen
 *
 * @param pScreen       pointer to ScreenRec the pointer handling applies to
 * @param spireFuncs    pointer to miPointerSpriteFuncPtr call vectors
 * @param screenFuncs   pointer to miPointerScreenFuncPtr call vectors
 * @param waitForUpdate TRUE if MI shouldn't redraw the pointer immediately,
                        but wait for somebody else triggering it explicitly
 * @return TRUE on success, FALSE usually indicates allocation failure
 */
_X_EXPORT Bool
miPointerInitialize(ScreenPtr pScreen,
                    miPointerSpriteFuncPtr spriteFuncs,
                    miPointerScreenFuncPtr screenFuncs,
                    Bool waitForUpdate);

#endif                          /* MIPOINTER_H */