pixman-xserver-compat.h

按照官方的说法：Cairo is a vector graphics library with cross-device output support. 翻译过来

/*
 * Copyright © 2005 Red Hat, 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 Red Hat,
 * Inc. not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission.  Red Hat, Inc. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl Worth, Red Hat, Inc.
 */

#ifndef _PIXMAN_XSERVER_COMPAT_H_
#define _PIXMAN_XSERVER_COMPAT_H_

/* This is a compatibility header file, designed to make it easier to
 * synchronize files between libpixman and the xserver repository.
 *
 * Of course, long-term we would instead like to have the X server
 * depend on libpixman to eliminate the code duplication. But for now,
 * we at least make it easy to share files.
 *
 * The libpixman code base regards the xserver repository as canonical
 * for any shared files, so changes should be pushed up there. Then,
 * to merge changes back down into libpixman, the process should be to
 * simply copy the file and to replace the block of include directives
 * with:
 *
 *	#include "pixman-xserver-compat.h"
 */

/* First, include the primary internal header file for libpixman. */

#include "icint.h"

/* Then, define any names that the server code will be expecting in
 * terms of libpixman names. */
/*
typedef uint8_t			CARD8;
typedef uint16_t		CARD16;
typedef int16_t			INT16;

typedef int			Bool;
#define FALSE 0
#define TRUE  1

typedef pixman_bits_t		FbBits;
typedef pixman_image_t*		PicturePtr;
typedef pixman_box16_t		BoxRec;
typedef pixman_box16_t*		BoxPtr;

typedef pixman_point_fixed_t	xPointFixed;
typedef pixman_line_fixed_t	xLineFixed;
typedef pixman_trapezoid_t	xTrapezoid;
typedef pixman_triangle_t	xTriangle;
*/
#define RENDER 1
/*
#define FB_SHIFT IC_SHIFT
#define FB_MASK IC_MASK
#define FB_ALLONES IC_ALLONES
#define FbMaskBits IcMaskBits
*/

/* XXX: We changed some function and field names which makes for some
 * ugly hacks... */
#define pDrawable pixels
#define fbGetDrawable(pDrawable, buf, outstride, outbpp, xoff, yoff) { \
    (buf) = (pDrawable)->data; \
    (outstride) = ((int) pDrawable->stride) / sizeof (pixman_bits_t); \
    (outbpp) = (pDrawable)->bpp; \
    (xoff) = 0; \
    (yoff) = 0; \
}

/* Extended repeat attributes included in 0.10 */
#define RepeatNone                          0
#define RepeatNormal                        1
#define RepeatPad                           2
#define RepeatReflect                       3

typedef pixman_vector_t PictVector;
typedef pixman_vector_t* PictVectorPtr;

#define miIndexedPtr FbIndexedPtr
#define miIndexToEnt24 FbIndexToEnt24
#define miIndexToEntY24 FbIndexToEntY24

#define MAX_FIXED_48_16	    ((xFixed_48_16) 0x7fffffff)
#define MIN_FIXED_48_16	    (-((xFixed_48_16) 1 << 31))

/* Then, include any header files that have been copied directly
 * from xserver. */

#include "renderedge.h"

/* And finally, this one prototype must come after the include of
 * renderedge.h, so it can't live alongside the other prototypes in
 * the horrible mess that is icint.h.
 */

pixman_private void
fbRasterizeEdges (pixman_bits_t		*buf,
		  int			bpp,
		  int			width,
		  int			stride,
		  RenderEdge		*l,
		  RenderEdge	 	*r,
		  pixman_fixed16_16_t	t,
		  pixman_fixed16_16_t	b);

#endif