/*
 * $XFree86: xc/programs/Xserver/render/mipict.h,v 1.8 2001/07/19 04:42:10 keithp Exp $
 *
 * Copyright © 2000 SuSE, Inc.
 *
 * 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 SuSE not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  SuSE makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
 * 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.
 *
 * Author:  Keith Packard, SuSE, Inc.
 */

#ifndef _MIPICT_H_
#define _MIPICT_H_

#include "picturestr.h"

#define MI_MAX_INDEXED	256 /* XXX depth must be <= 8 */

#if MI_MAX_INDEXED <= 256
typedef CARD8 miIndexType;
#endif

typedef struct _miIndexed {
    Bool	color;
    CARD32	rgba[MI_MAX_INDEXED];
    miIndexType	ent[32768];
} miIndexedRec, *miIndexedPtr;

#define miCvtR8G8B8to15(s) ((((s) >> 3) & 0x001f) | \
			     (((s) >> 6) & 0x03e0) | \
			     (((s) >> 9) & 0x7c00))
#define miIndexToEnt15(mif,rgb15) ((mif)->ent[rgb15])
#define miIndexToEnt24(mif,rgb24) miIndexToEnt15(mif,miCvtR8G8B8to15(rgb24))

/*
 * Standard NTSC luminance conversions:
 *
 *  y = r * 0.299 + g * 0.587 + b * 0.114
 *
 * Approximate this for a bit more speed:
 *
 *  y = (r * 153 + g * 301 + b * 58) / 512
 *
 * This gives 17 bits of luminance; to get 15 bits, lop the low two
 */

#define miCvtR8G8B8toY15(s)	(((((s) >> 16) & 0xff) * 153 + \
				  (((s) >>  8) & 0xff) * 301 + \
				  (((s)      ) & 0xff) * 58) >> 2)
#define miIndexToEntY24(mif,rgb24) ((mif)->ent[miCvtR8G8B8toY15(rgb24)])

int
miCreatePicture (PicturePtr pPicture);

void
miDestroyPicture (PicturePtr pPicture);

void
miDestroyPictureClip (PicturePtr pPicture);

int
miChangePictureClip (PicturePtr    pPicture,
		     int	   type,
		     pointer	   value,
		     int	   n);

void
miChangePicture (PicturePtr pPicture,
		 Mask       mask);

void
miValidatePicture (PicturePtr pPicture,
		   Mask       mask);


Bool
miClipPicture (RegionPtr    pRegion,
	       PicturePtr   pPicture,
	       INT16	    xReg,
	       INT16	    yReg,
	       INT16	    xPict,
	       INT16	    yPict);

Bool
miComputeCompositeRegion (RegionPtr	pRegion,
			  PicturePtr	pSrc,
			  PicturePtr	pMask,
			  PicturePtr	pDst,
			  INT16		xSrc,
			  INT16		ySrc,
			  INT16		xMask,
			  INT16		yMask,
			  INT16		xDst,
			  INT16		yDst,
			  CARD16	width,
			  CARD16	height);

Bool
miPictureInit (ScreenPtr pScreen, PictFormatPtr formats, int nformats);

void
miGlyphExtents (int		nlist,
		GlyphListPtr	list,
		GlyphPtr	*glyphs,
		BoxPtr		extents);

void
miGlyphs (CARD8		op,
	  PicturePtr	pSrc,
	  PicturePtr	pDst,
	  PictFormatPtr	maskFormat,
	  INT16		xSrc,
	  INT16		ySrc,
	  int		nlist,
	  GlyphListPtr	list,
	  GlyphPtr	*glyphs);

void
miRenderColorToPixel (PictFormatPtr pPict,
		      xRenderColor  *color,
		      CARD32	    *pixel);

void
miRenderPixelToColor (PictFormatPtr pPict,
		      CARD32	    pixel,
		      xRenderColor  *color);

void
miCompositeRects (CARD8		op,
		  PicturePtr	pDst,
		  xRenderColor  *color,
		  int		nRect,
		  xRectangle    *rects);

Bool
miInitIndexed (ScreenPtr	pScreen,
	       PictFormatPtr	pFormat);

void
miCloseIndexed (ScreenPtr	pScreen,
		PictFormatPtr	pFormat);

void
miUpdateIndexed (ScreenPtr	pScreen,
		 PictFormatPtr	pFormat,
		 int		ndef,
		 xColorItem	*pdef);

#endif /* _MIPICT_H_ */