/*
 *
 * Copyright © 2000 Keith Packard
 *
 * 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 _SHADOW_H_
#define _SHADOW_H_

#include "scrnintstr.h"

#include "picturestr.h"

#include "damage.h"
#include "damagestr.h"
typedef struct _shadowBuf *shadowBufPtr;

typedef void (*ShadowUpdateProc) (ScreenPtr pScreen, shadowBufPtr pBuf);

#define SHADOW_WINDOW_RELOCATE 1
#define SHADOW_WINDOW_READ 2
#define SHADOW_WINDOW_WRITE 4

typedef void *(*ShadowWindowProc) (ScreenPtr pScreen,
                                   CARD32 row,
                                   CARD32 offset,
                                   int mode, CARD32 *size, void *closure);

/* BC hack: do not move the damage member.  see shadow.c for explanation. */
typedef struct _shadowBuf {
    DamagePtr pDamage;
    ShadowUpdateProc update;
    ShadowWindowProc window;
    RegionRec damage;
    PixmapPtr pPixmap;
    void *closure;
    int randr;

    /* screen wrappers */
    GetImageProcPtr GetImage;
    CloseScreenProcPtr CloseScreen;
} shadowBufRec;

/* Match defines from randr extension */
#define SHADOW_ROTATE_0	    1
#define SHADOW_ROTATE_90    2
#define SHADOW_ROTATE_180   4
#define SHADOW_ROTATE_270   8
#define SHADOW_ROTATE_ALL   (SHADOW_ROTATE_0|SHADOW_ROTATE_90|\
			     SHADOW_ROTATE_180|SHADOW_ROTATE_270)
#define SHADOW_REFLECT_X    16
#define SHADOW_REFLECT_Y    32
#define SHADOW_REFLECT_ALL  (SHADOW_REFLECT_X|SHADOW_REFLECT_Y)

extern int shadowScrPrivateIndex;

#define shadowGetBuf(pScr)  ((shadowBufPtr) (pScr)->devPrivates[shadowScrPrivateIndex].ptr)
#define shadowBuf(pScr)            shadowBufPtr pBuf = shadowGetBuf(pScr)
#define shadowDamage(pBuf)  DamageRegion(pBuf->pDamage)

Bool
 shadowSetup(ScreenPtr pScreen);

Bool

shadowAdd(ScreenPtr pScreen,
          PixmapPtr pPixmap,
          ShadowUpdateProc update,
          ShadowWindowProc window, int randr, void *closure);

void
 shadowRemove(ScreenPtr pScreen, PixmapPtr pPixmap);

shadowBufPtr shadowFindBuf(WindowPtr pWindow);

Bool

shadowInit(ScreenPtr pScreen, ShadowUpdateProc update, ShadowWindowProc window);

void *shadowAlloc(int width, int height, int bpp);

void
 shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdatePlanar4(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdatePlanar4x8(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotatePacked(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate8_90(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16_90(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16_90YX(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate32_90(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate8_180(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16_180(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate32_180(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate8_270(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16_270(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16_270YX(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate32_270(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate8(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate16(ScreenPtr pScreen, shadowBufPtr pBuf);

void
 shadowUpdateRotate32(ScreenPtr pScreen, shadowBufPtr pBuf);

typedef void (*shadowUpdateProc) (ScreenPtr, shadowBufPtr);

shadowUpdateProc shadowUpdatePackedWeak(void);

shadowUpdateProc shadowUpdatePlanar4Weak(void);

shadowUpdateProc shadowUpdatePlanar4x8Weak(void);

shadowUpdateProc shadowUpdateRotatePackedWeak(void);

#endif                          /* _SHADOW_H_ */