misprite.c

远程桌面连接工具

/*
 * misprite.c
 *
 * machine independent software sprite routines
 */

/* $XConsortium: misprite.c,v 5.47 94/04/17 20:27:53 dpw Exp $ */
/* $XFree86: xc/programs/Xserver/mi/misprite.c,v 3.0 1996/08/25 14:13:56 dawes Exp $ */

/*

Copyright (c) 1989  X Consortium

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 THE
X CONSORTIUM 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 X Consortium 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 X Consortium.
*/

# include   "X.h"
# include   "Xproto.h"
# include   "misc.h"
# include   "pixmapstr.h"
# include   "input.h"
# include   "mi.h"
# include   "cursorstr.h"
# include   "font.h"
# include   "scrnintstr.h"
# include   "colormapst.h"
# include   "windowstr.h"
# include   "gcstruct.h"
# include   "mipointer.h"
# include   "mispritest.h"
# include   "dixfontstr.h"
# include   "fontstruct.h"

/*
 * screen wrappers
 */

static int  miSpriteScreenIndex;
static unsigned long miSpriteGeneration = 0;

static Bool	    miSpriteCloseScreen();
static void	    miSpriteGetImage();
static void	    miSpriteGetSpans();
static void	    miSpriteSourceValidate();
static Bool	    miSpriteCreateGC();
static void	    miSpriteBlockHandler();
static void	    miSpriteInstallColormap();
static void	    miSpriteStoreColors();

static void	    miSpritePaintWindowBackground();
static void	    miSpritePaintWindowBorder();
static void	    miSpriteCopyWindow();
static void	    miSpriteClearToBackground();

static void	    miSpriteSaveDoomedAreas();
static RegionPtr    miSpriteRestoreAreas();
static void	    miSpriteComputeSaved();

#define SCREEN_PROLOGUE(pScreen, field)\
  ((pScreen)->field = \
   ((miSpriteScreenPtr) (pScreen)->devPrivates[miSpriteScreenIndex].ptr)->field)

#define SCREEN_EPILOGUE(pScreen, field, wrapper)\
    ((pScreen)->field = wrapper)

/*
 * GC func wrappers
 */

static int  miSpriteGCIndex;

static void miSpriteValidateGC (),  miSpriteCopyGC ();
static void miSpriteDestroyGC(),    miSpriteChangeGC();
static void miSpriteChangeClip(),   miSpriteDestroyClip();
static void miSpriteCopyClip();

static GCFuncs	miSpriteGCFuncs = {
    miSpriteValidateGC,
    miSpriteChangeGC,
    miSpriteCopyGC,
    miSpriteDestroyGC,
    miSpriteChangeClip,
    miSpriteDestroyClip,
    miSpriteCopyClip,
};

#define GC_FUNC_PROLOGUE(pGC)					\
    miSpriteGCPtr   pGCPriv =					\
	(miSpriteGCPtr) (pGC)->devPrivates[miSpriteGCIndex].ptr;\
    (pGC)->funcs = pGCPriv->wrapFuncs;				\
    if (pGCPriv->wrapOps)					\
	(pGC)->ops = pGCPriv->wrapOps;

#define GC_FUNC_EPILOGUE(pGC)					\
    pGCPriv->wrapFuncs = (pGC)->funcs;				\
    (pGC)->funcs = &miSpriteGCFuncs;				\
    if (pGCPriv->wrapOps)					\
    {								\
	pGCPriv->wrapOps = (pGC)->ops;				\
	(pGC)->ops = &miSpriteGCOps;				\
    }

/*
 * GC op wrappers
 */

static void	    miSpriteFillSpans(),	miSpriteSetSpans();
static void	    miSpritePutImage();
static RegionPtr    miSpriteCopyArea(),		miSpriteCopyPlane();
static void	    miSpritePolyPoint(),	miSpritePolylines();
static void	    miSpritePolySegment(),	miSpritePolyRectangle();
static void	    miSpritePolyArc(),		miSpriteFillPolygon();
static void	    miSpritePolyFillRect(),	miSpritePolyFillArc();
static int	    miSpritePolyText8(),	miSpritePolyText16();
static void	    miSpriteImageText8(),	miSpriteImageText16();
static void	    miSpriteImageGlyphBlt(),	miSpritePolyGlyphBlt();
static void	    miSpritePushPixels();
#ifdef NEED_LINEHELPER
static void	    miSpriteLineHelper();
#endif

static GCOps miSpriteGCOps = {
    miSpriteFillSpans,	    miSpriteSetSpans,	    miSpritePutImage,	
    miSpriteCopyArea,	    miSpriteCopyPlane,	    miSpritePolyPoint,
    miSpritePolylines,	    miSpritePolySegment,    miSpritePolyRectangle,
    miSpritePolyArc,	    miSpriteFillPolygon,    miSpritePolyFillRect,
    miSpritePolyFillArc,    miSpritePolyText8,	    miSpritePolyText16,
    miSpriteImageText8,	    miSpriteImageText16,    miSpriteImageGlyphBlt,
    miSpritePolyGlyphBlt,   miSpritePushPixels
#ifdef NEED_LINEHELPER
    , miSpriteLineHelper
#endif
};

/*
 * testing only -- remove cursor for every draw.  Eventually,
 * each draw operation will perform a bounding box check against
 * the saved cursor area
 */

#define GC_SETUP_CHEAP(pDrawable)				    \
    miSpriteScreenPtr	pScreenPriv = (miSpriteScreenPtr)	    \
	(pDrawable)->pScreen->devPrivates[miSpriteScreenIndex].ptr; \

#define GC_SETUP(pDrawable, pGC)				    \
    GC_SETUP_CHEAP(pDrawable)					    \
    miSpriteGCPtr	pGCPrivate = (miSpriteGCPtr)		    \
	(pGC)->devPrivates[miSpriteGCIndex].ptr;		    \
    GCFuncs *oldFuncs = pGC->funcs;

#define GC_SETUP_AND_CHECK(pDrawable, pGC)			    \
    GC_SETUP(pDrawable, pGC);					    \
    if (GC_CHECK((WindowPtr)pDrawable))				    \
	miSpriteRemoveCursor (pDrawable->pScreen);
    
#define GC_CHECK(pWin)						    \
    (pScreenPriv->isUp &&					    \
        (pScreenPriv->pCacheWin == pWin ?			    \
	    pScreenPriv->isInCacheWin : (			    \
	    (pScreenPriv->pCacheWin = (pWin)),			    \
	    (pScreenPriv->isInCacheWin =			    \
		(pWin)->drawable.x < pScreenPriv->saved.x2 &&	    \
		pScreenPriv->saved.x1 < (pWin)->drawable.x +	    \
				    (int) (pWin)->drawable.width && \
		(pWin)->drawable.y < pScreenPriv->saved.y2 &&	    \
		pScreenPriv->saved.y1 < (pWin)->drawable.y +	    \
				    (int) (pWin)->drawable.height &&\
		RECT_IN_REGION((pWin)->drawable.pScreen, &(pWin)->borderClip, \
			&pScreenPriv->saved) != rgnOUT))))

#define GC_OP_PROLOGUE(pGC) { \
    (pGC)->funcs = pGCPrivate->wrapFuncs; \
    (pGC)->ops = pGCPrivate->wrapOps; \
    }

#define GC_OP_EPILOGUE(pGC) { \
    pGCPrivate->wrapOps = (pGC)->ops; \
    (pGC)->funcs = oldFuncs; \
    (pGC)->ops = &miSpriteGCOps; \
    }

/*
 * pointer-sprite method table
 */

static Bool miSpriteRealizeCursor (),	miSpriteUnrealizeCursor ();
static void miSpriteSetCursor (),	miSpriteMoveCursor ();

miPointerSpriteFuncRec miSpritePointerFuncs = {
    miSpriteRealizeCursor,
    miSpriteUnrealizeCursor,
    miSpriteSetCursor,
    miSpriteMoveCursor,
};

/*
 * other misc functions
 */

static void miSpriteRemoveCursor (),	miSpriteRestoreCursor();

/*
 * miSpriteInitialize -- called from device-dependent screen
 * initialization proc after all of the function pointers have
 * been stored in the screen structure.
 */

Bool
miSpriteInitialize (pScreen, cursorFuncs, screenFuncs)
    ScreenPtr		    pScreen;
    miSpriteCursorFuncPtr   cursorFuncs;
    miPointerScreenFuncPtr  screenFuncs;
{
    miSpriteScreenPtr	pPriv;
    VisualPtr		pVisual;
    
    if (miSpriteGeneration != serverGeneration)
    {
	miSpriteScreenIndex = AllocateScreenPrivateIndex ();
	if (miSpriteScreenIndex < 0)
	    return FALSE;
	miSpriteGeneration = serverGeneration;
	miSpriteGCIndex = AllocateGCPrivateIndex ();
    }
    if (!AllocateGCPrivate(pScreen, miSpriteGCIndex, sizeof(miSpriteGCRec)))
	return FALSE;
    pPriv = (miSpriteScreenPtr) xalloc (sizeof (miSpriteScreenRec));
    if (!pPriv)
	return FALSE;
    if (!miPointerInitialize (pScreen, &miSpritePointerFuncs, screenFuncs,TRUE))
    {
	xfree ((pointer) pPriv);
	return FALSE;
    }
    for (pVisual = pScreen->visuals;
	 pVisual->vid != pScreen->rootVisual;
	 pVisual++)
	;
    pPriv->pVisual = pVisual;
    pPriv->CloseScreen = pScreen->CloseScreen;
    pPriv->GetImage = pScreen->GetImage;
    pPriv->GetSpans = pScreen->GetSpans;
    pPriv->SourceValidate = pScreen->SourceValidate;
    pPriv->CreateGC = pScreen->CreateGC;
    pPriv->BlockHandler = pScreen->BlockHandler;
    pPriv->InstallColormap = pScreen->InstallColormap;
    pPriv->StoreColors = pScreen->StoreColors;

    pPriv->PaintWindowBackground = pScreen->PaintWindowBackground;
    pPriv->PaintWindowBorder = pScreen->PaintWindowBorder;
    pPriv->CopyWindow = pScreen->CopyWindow;
    pPriv->ClearToBackground = pScreen->ClearToBackground;

    pPriv->SaveDoomedAreas = pScreen->SaveDoomedAreas;
    pPriv->RestoreAreas = pScreen->RestoreAreas;

    pPriv->pCursor = NULL;
    pPriv->x = 0;
    pPriv->y = 0;
    pPriv->isUp = FALSE;
    pPriv->shouldBeUp = FALSE;
    pPriv->pCacheWin = NullWindow;
    pPriv->isInCacheWin = FALSE;
    pPriv->checkPixels = TRUE;
    pPriv->pInstalledMap = NULL;
    pPriv->pColormap = NULL;
    pPriv->funcs = cursorFuncs;
    pPriv->colors[SOURCE_COLOR].red = 0;
    pPriv->colors[SOURCE_COLOR].green = 0;
    pPriv->colors[SOURCE_COLOR].blue = 0;
    pPriv->colors[MASK_COLOR].red = 0;
    pPriv->colors[MASK_COLOR].green = 0;
    pPriv->colors[MASK_COLOR].blue = 0;
    pScreen->devPrivates[miSpriteScreenIndex].ptr = (pointer) pPriv;
    pScreen->CloseScreen = miSpriteCloseScreen;
    pScreen->GetImage = miSpriteGetImage;
    pScreen->GetSpans = miSpriteGetSpans;
    pScreen->SourceValidate = miSpriteSourceValidate;
    pScreen->CreateGC = miSpriteCreateGC;
    pScreen->BlockHandler = miSpriteBlockHandler;
    pScreen->InstallColormap = miSpriteInstallColormap;
    pScreen->StoreColors = miSpriteStoreColors;

    pScreen->PaintWindowBackground = miSpritePaintWindowBackground;
    pScreen->PaintWindowBorder = miSpritePaintWindowBorder;
    pScreen->CopyWindow = miSpriteCopyWindow;
    pScreen->ClearToBackground = miSpriteClearToBackground;

    pScreen->SaveDoomedAreas = miSpriteSaveDoomedAreas;
    pScreen->RestoreAreas = miSpriteRestoreAreas;

    return TRUE;
}

/*
 * Screen wrappers
 */

/*
 * CloseScreen wrapper -- unwrap everything, free the private data
 * and call the wrapped function
 */

static Bool
miSpriteCloseScreen (i, pScreen)
    ScreenPtr	pScreen;
{
    miSpriteScreenPtr   pScreenPriv;

    pScreenPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    pScreen->CloseScreen = pScreenPriv->CloseScreen;
    pScreen->GetImage = pScreenPriv->GetImage;
    pScreen->GetSpans = pScreenPriv->GetSpans;
    pScreen->SourceValidate = pScreenPriv->SourceValidate;
    pScreen->CreateGC = pScreenPriv->CreateGC;
    pScreen->BlockHandler = pScreenPriv->BlockHandler;
    pScreen->InstallColormap = pScreenPriv->InstallColormap;
    pScreen->StoreColors = pScreenPriv->StoreColors;

    pScreen->PaintWindowBackground = pScreenPriv->PaintWindowBackground;
    pScreen->PaintWindowBorder = pScreenPriv->PaintWindowBorder;
    pScreen->CopyWindow = pScreenPriv->CopyWindow;
    pScreen->ClearToBackground = pScreenPriv->ClearToBackground;

    pScreen->SaveDoomedAreas = pScreenPriv->SaveDoomedAreas;
    pScreen->RestoreAreas = pScreenPriv->RestoreAreas;

    xfree ((pointer) pScreenPriv);

    return (*pScreen->CloseScreen) (i, pScreen);
}

static void
miSpriteGetImage (pDrawable, sx, sy, w, h, format, planemask, pdstLine)
    DrawablePtr	    pDrawable;
    int		    sx, sy, w, h;
    unsigned int    format;
    unsigned long   planemask;
    char	    *pdstLine;
{
    ScreenPtr	    pScreen = pDrawable->pScreen;
    miSpriteScreenPtr    pScreenPriv;
    
    SCREEN_PROLOGUE (pScreen, GetImage);

    pScreenPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    if (pDrawable->type == DRAWABLE_WINDOW &&
        pScreenPriv->isUp &&
	ORG_OVERLAP(&pScreenPriv->saved,pDrawable->x,pDrawable->y, sx, sy, w, h))
    {
	miSpriteRemoveCursor (pScreen);
    }

    (*pScreen->GetImage) (pDrawable, sx, sy, w, h,
			  format, planemask, pdstLine);

    SCREEN_EPILOGUE (pScreen, GetImage, miSpriteGetImage);
}

static void
miSpriteGetSpans (pDrawable, wMax, ppt, pwidth, nspans, pdstStart)
    DrawablePtr	pDrawable;
    int		wMax;
    DDXPointPtr	ppt;
    int		*pwidth;
    int		nspans;
    char	*pdstStart;
{
    ScreenPtr		    pScreen = pDrawable->pScreen;
    miSpriteScreenPtr	    pScreenPriv;
    
    SCREEN_PROLOGUE (pScreen, GetSpans);

    pScreenPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    if (pDrawable->type == DRAWABLE_WINDOW && pScreenPriv->isUp)
    {
	register DDXPointPtr    pts;
	register int    	*widths;
	register int    	nPts;
	register int    	xorg,
				yorg;

	xorg = pDrawable->x;
	yorg = pDrawable->y;

	for (pts = ppt, widths = pwidth, nPts = nspans;
	     nPts--;
	     pts++, widths++)
 	{
	    if (SPN_OVERLAP(&pScreenPriv->saved,pts->y+yorg,
			     pts->x+xorg,*widths))
	    {
		miSpriteRemoveCursor (pScreen);
		break;
	    }
	}
    }

    (*pScreen->GetSpans) (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);

    SCREEN_EPILOGUE (pScreen, GetSpans, miSpriteGetSpans);
}

static void
miSpriteSourceValidate (pDrawable, x, y, width, height)
    DrawablePtr	pDrawable;
    int		x, y, width, height;
{
    ScreenPtr		    pScreen = pDrawable->pScreen;
    miSpriteScreenPtr	    pScreenPriv;
    
    SCREEN_PROLOGUE (pScreen, SourceValidate);

    pScreenPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    if (pDrawable->type == DRAWABLE_WINDOW && pScreenPriv->isUp &&
	ORG_OVERLAP(&pScreenPriv->saved, pDrawable->x, pDrawable->y,
		    x, y, width, height))
    {
	miSpriteRemoveCursor (pScreen);
    }

    if (pScreen->SourceValidate)
	(*pScreen->SourceValidate) (pDrawable, x, y, width, height);

    SCREEN_EPILOGUE (pScreen, SourceValidate, miSpriteSourceValidate);
}

static Bool
miSpriteCreateGC (pGC)
    GCPtr   pGC;
{
    ScreenPtr	    pScreen = pGC->pScreen;
    Bool	    ret;
    miSpriteGCPtr   pPriv;

    SCREEN_PROLOGUE (pScreen, CreateGC);
    
    pPriv = (miSpriteGCPtr)pGC->devPrivates[miSpriteGCIndex].ptr;

    ret = (*pScreen->CreateGC) (pGC);

    pPriv->wrapOps = NULL;
    pPriv->wrapFuncs = pGC->funcs;
    pGC->funcs = &miSpriteGCFuncs;

    SCREEN_EPILOGUE (pScreen, CreateGC, miSpriteCreateGC);

    return ret;
}

static void
miSpriteBlockHandler (i, blockData, pTimeout, pReadmask)
    int	i;
    pointer	blockData;
    OSTimePtr	pTimeout;
    pointer	pReadmask;
{
    ScreenPtr		pScreen = screenInfo.screens[i];
    miSpriteScreenPtr	pPriv;

    pPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    SCREEN_PROLOGUE(pScreen, BlockHandler);
    
    (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);

    SCREEN_EPILOGUE(pScreen, BlockHandler, miSpriteBlockHandler);

    if (!pPriv->isUp && pPriv->shouldBeUp)
	miSpriteRestoreCursor (pScreen);
}

static void
miSpriteInstallColormap (pMap)
    ColormapPtr	pMap;
{
    ScreenPtr		pScreen = pMap->pScreen;
    miSpriteScreenPtr	pPriv;

    pPriv = (miSpriteScreenPtr) pScreen->devPrivates[miSpriteScreenIndex].ptr;

    SCREEN_PROLOGUE(pScreen, InstallColormap);
    
    (*pScreen->InstallColormap) (pMap);

    SCREEN_EPILOGUE(pScreen, InstallColormap, miSpriteInstallColormap);

    pPriv->pInstalledMap = pMap;
    if (pPriv->pColormap != pMap)
    {
    	pPriv->checkPixels = TRUE;
	if (pPriv->isUp)
	    miSpriteRemoveCursor (pScreen);
    }
}