icint.h

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

	   int	    height,

	   FbStip   *stip,
	   FbStride stipStride,
	   int	    stipWidth,
	   int	    stipHeight,
	   Bool	    even,

	   FbBits   fgand,
	   FbBits   fgxor,
	   FbBits   bgand,
	   FbBits   bgxor,

	   int	    xRot,
	   int	    yRot);

/* XXX: Is depth redundant here? */
struct pixman_format {
    int		format_code;
    int		depth;
    int		red, redMask;
    int		green, greenMask;
    int		blue, blueMask;
    int		alpha, alphaMask;
};

typedef struct _FbPixels {
    pixman_bits_t		*data;
    unsigned int	width;
    unsigned int	height;
    unsigned int	depth;
    unsigned int	bpp;
    unsigned int	stride;
    int			x;
    int			y;
    unsigned int	refcnt;
} FbPixels;

/* XXX: This is to avoid including colormap.h from the server includes */
typedef uint32_t Pixel;

/* icutil.c */
pixman_private pixman_bits_t
fbReplicatePixel (Pixel p, int bpp);

/* fbtrap.c */

pixman_private void
fbRasterizeTrapezoid (pixman_image_t		*pMask,
		      const pixman_trapezoid_t  *pTrap,
		      int		x_off,
		      int		y_off);

/* XXX: This is to avoid including gc.h from the server includes */
/* clientClipType field in GC */
#define CT_NONE			0
#define CT_PIXMAP		1
#define CT_REGION		2
#define CT_UNSORTED		6
#define CT_YSORTED		10
#define CT_YXSORTED		14
#define CT_YXBANDED		18

#include "icimage.h"

/* iccolor.c */

/* GCC 3.4 supports a "population count" builtin, which on many targets is
   implemented with a single instruction.  There is a fallback definition
   in libgcc in case a target does not have one, which should be just as
   good as the static function below.  */
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
# if __INT_MIN__ == 0x7fffffff
#  define _FbOnes(mask)		__builtin_popcount(mask)
# else
#  define _FbOnes(mask)		__builtin_popcountl((mask) & 0xffffffff)
# endif
#else
# define ICINT_NEED_IC_ONES
int
_FbOnes(unsigned long mask);
#endif

/* icformat.c */

pixman_private void
pixman_format_init (pixman_format_t *format, int format_code);

/* icimage.c */

pixman_private pixman_image_t *
pixman_image_createForPixels (FbPixels	*pixels,
			pixman_format_t	*format);

pixman_private uint32_t
pixman_gradient_color (pixman_gradient_stop_t *stop1,
		       pixman_gradient_stop_t *stop2,
		       uint32_t		      x);

#define PictureGradientColor pixman_gradient_color

/* icpixels.c */

pixman_private FbPixels *
FbPixelsCreate (int width, int height, int depth);

pixman_private FbPixels *
FbPixelsCreateForData (pixman_bits_t *data, int width, int height, int depth, int bpp, int stride);

pixman_private void
FbPixelsDestroy (FbPixels *pixels);

/* ictransform.c */

pixman_private int
pixman_transform_point (pixman_transform_t	*transform,
		  pixman_vector_t	*vector);

/* Avoid unnessecary PLT entries.  */

slim_hidden_proto(pixman_image_create)
slim_hidden_proto(pixman_color_to_pixel)
slim_hidden_proto(pixman_format_init)
slim_hidden_proto(pixman_image_destroy)
slim_hidden_proto(pixman_fill_rectangles)
slim_hidden_proto(pixman_image_set_component_alpha)
slim_hidden_proto(pixman_image_set_repeat)
slim_hidden_proto(pixman_composite)

#include "icrop.h"

/* XXX: For now, I'm just wholesale pasting Xserver/render/picture.h here: */
#ifndef _PICTURE_H_
#define _PICTURE_H_

typedef struct _DirectFormat	*DirectFormatPtr;
typedef struct _PictFormat	*PictFormatPtr;

/*
 * While the protocol is generous in format support, the
 * sample implementation allows only packed RGB and GBR
 * representations for data to simplify software rendering,
 */
#define PICT_FORMAT(bpp,type,a,r,g,b)	(((bpp) << 24) |  \
					 ((type) << 16) | \
					 ((a) << 12) | \
					 ((r) << 8) | \
					 ((g) << 4) | \
					 ((b)))

/*
 * gray/color formats use a visual index instead of argb
 */
#define PICT_VISFORMAT(bpp,type,vi)	(((bpp) << 24) |  \
					 ((type) << 16) | \
					 ((vi)))

#define PICT_FORMAT_BPP(f)	(((f) >> 24)       )
#define PICT_FORMAT_TYPE(f)	(((f) >> 16) & 0xff)
#define PICT_FORMAT_A(f)	(((f) >> 12) & 0x0f)
#define PICT_FORMAT_R(f)	(((f) >>  8) & 0x0f)
#define PICT_FORMAT_G(f)	(((f) >>  4) & 0x0f)
#define PICT_FORMAT_B(f)	(((f)      ) & 0x0f)
#define PICT_FORMAT_RGB(f)	(((f)      ) & 0xfff)
#define PICT_FORMAT_VIS(f)	(((f)      ) & 0xffff)

#define PICT_TYPE_OTHER	0
#define PICT_TYPE_A	1
#define PICT_TYPE_ARGB	2
#define PICT_TYPE_ABGR	3
#define PICT_TYPE_COLOR	4
#define PICT_TYPE_GRAY	5

#define PICT_FORMAT_COLOR(f)	(PICT_FORMAT_TYPE(f) & 2)

/* 32bpp formats */
#define PICT_a8r8g8b8	PICT_FORMAT(32,PICT_TYPE_ARGB,8,8,8,8)
#define PICT_x8r8g8b8	PICT_FORMAT(32,PICT_TYPE_ARGB,0,8,8,8)
#define PICT_a8b8g8r8	PICT_FORMAT(32,PICT_TYPE_ABGR,8,8,8,8)
#define PICT_x8b8g8r8	PICT_FORMAT(32,PICT_TYPE_ABGR,0,8,8,8)

/* 24bpp formats */
#define PICT_r8g8b8	PICT_FORMAT(24,PICT_TYPE_ARGB,0,8,8,8)
#define PICT_b8g8r8	PICT_FORMAT(24,PICT_TYPE_ABGR,0,8,8,8)

/* 16bpp formats */
#define PICT_r5g6b5	PICT_FORMAT(16,PICT_TYPE_ARGB,0,5,6,5)
#define PICT_b5g6r5	PICT_FORMAT(16,PICT_TYPE_ABGR,0,5,6,5)

#define PICT_a1r5g5b5	PICT_FORMAT(16,PICT_TYPE_ARGB,1,5,5,5)
#define PICT_x1r5g5b5	PICT_FORMAT(16,PICT_TYPE_ARGB,0,5,5,5)
#define PICT_a1b5g5r5	PICT_FORMAT(16,PICT_TYPE_ABGR,1,5,5,5)
#define PICT_x1b5g5r5	PICT_FORMAT(16,PICT_TYPE_ABGR,0,5,5,5)
#define PICT_a4r4g4b4	PICT_FORMAT(16,PICT_TYPE_ARGB,4,4,4,4)
#define PICT_x4r4g4b4	PICT_FORMAT(16,PICT_TYPE_ARGB,0,4,4,4)
#define PICT_a4b4g4r4	PICT_FORMAT(16,PICT_TYPE_ABGR,4,4,4,4)
#define PICT_x4b4g4r4	PICT_FORMAT(16,PICT_TYPE_ABGR,0,4,4,4)

/* 8bpp formats */
#define PICT_a8		PICT_FORMAT(8,PICT_TYPE_A,8,0,0,0)
#define PICT_r3g3b2	PICT_FORMAT(8,PICT_TYPE_ARGB,0,3,3,2)
#define PICT_b2g3r3	PICT_FORMAT(8,PICT_TYPE_ABGR,0,3,3,2)
#define PICT_a2r2g2b2	PICT_FORMAT(8,PICT_TYPE_ARGB,2,2,2,2)
#define PICT_a2b2g2r2	PICT_FORMAT(8,PICT_TYPE_ABGR,2,2,2,2)

#define PICT_c8		PICT_FORMAT(8,PICT_TYPE_COLOR,0,0,0,0)
#define PICT_g8		PICT_FORMAT(8,PICT_TYPE_GRAY,0,0,0,0)

/* 4bpp formats */
#define PICT_a4		PICT_FORMAT(4,PICT_TYPE_A,4,0,0,0)
#define PICT_r1g2b1	PICT_FORMAT(4,PICT_TYPE_ARGB,0,1,2,1)
#define PICT_b1g2r1	PICT_FORMAT(4,PICT_TYPE_ABGR,0,1,2,1)
#define PICT_a1r1g1b1	PICT_FORMAT(4,PICT_TYPE_ARGB,1,1,1,1)
#define PICT_a1b1g1r1	PICT_FORMAT(4,PICT_TYPE_ABGR,1,1,1,1)

#define PICT_c4		PICT_FORMAT(4,PICT_TYPE_COLOR,0,0,0,0)
#define PICT_g4		PICT_FORMAT(4,PICT_TYPE_GRAY,0,0,0,0)

/* 1bpp formats */
#define PICT_a1		PICT_FORMAT(1,PICT_TYPE_A,1,0,0,0)

#define PICT_g1		PICT_FORMAT(1,PICT_TYPE_GRAY,0,0,0,0)

/*
 * For dynamic indexed visuals (GrayScale and PseudoColor), these control the
 * selection of colors allocated for drawing to Pictures.  The default
 * policy depends on the size of the colormap:
 *
 * Size		Default Policy
 * ----------------------------
 *  < 64	PolicyMono
 *  < 256	PolicyGray
 *  256		PolicyColor (only on PseudoColor)
 *
 * The actual allocation code lives in miindex.c, and so is
 * austensibly server dependent, but that code does:
 *
 * PolicyMono	    Allocate no additional colors, use black and white
 * PolicyGray	    Allocate 13 gray levels (11 cells used)
 * PolicyColor	    Allocate a 4x4x4 cube and 13 gray levels (71 cells used)
 * PolicyAll	    Allocate as big a cube as possible, fill with gray (all)
 *
 * Here's a picture to help understand how many colors are
 * actually allocated (this is just the gray ramp):
 *
 *                 gray level
 * all   0000 1555 2aaa 4000 5555 6aaa 8000 9555 aaaa bfff d555 eaaa ffff
 * b/w   0000                                                        ffff
 * 4x4x4                     5555                aaaa
 * extra      1555 2aaa 4000      6aaa 8000 9555      bfff d555 eaaa
 *
 * The default colormap supplies two gray levels (black/white), the
 * 4x4x4 cube allocates another two and nine more are allocated to fill
 * in the 13 levels.  When the 4x4x4 cube is not allocated, a total of
 * 11 cells are allocated.
 */

#define PictureCmapPolicyInvalid    -1
#define PictureCmapPolicyDefault    0
#define PictureCmapPolicyMono	    1
#define PictureCmapPolicyGray	    2
#define PictureCmapPolicyColor	    3
#define PictureCmapPolicyAll	    4

extern int PictureCmapPolicy pixman_private;

int	PictureParseCmapPolicy (const char *name);

/* Fixed point updates from Carl Worth, USC, Information Sciences Institute */

#ifdef WIN32
typedef __int64		xFixed_32_32;
#else
#  if defined(__alpha__) || defined(__alpha) || \
      defined(ia64) || defined(__ia64__) || \
      defined(__sparc64__) || \
      defined(__s390x__) || \
      defined(x86_64) || defined (__x86_64__)
typedef long		xFixed_32_32;
# else
#  if defined(__GNUC__) && \
    ((__GNUC__ > 2) || \
     ((__GNUC__ == 2) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ > 7)))
__extension__
#  endif
typedef long long int	xFixed_32_32;
# endif
#endif

typedef xFixed_32_32		xFixed_48_16;
typedef uint32_t		xFixed_1_31;
typedef uint32_t		xFixed_1_16;
typedef int32_t		xFixed_16_16;

/*
 * An unadorned "xFixed" is the same as xFixed_16_16,
 * (since it's quite common in the code)
 */
typedef	xFixed_16_16	xFixed;
#define XFIXED_BITS	16

#define xFixedToInt(f)	(int) ((f) >> XFIXED_BITS)
#define IntToxFixed(i)	((xFixed) (i) << XFIXED_BITS)
#define xFixedE		((xFixed) 1)
#define xFixed1		(IntToxFixed(1))
#define xFixed1MinusE	(xFixed1 - xFixedE)
#define xFixedFrac(f)	((f) & xFixed1MinusE)
#define xFixedFloor(f)	((f) & ~xFixed1MinusE)
#define xFixedCeil(f)	xFixedFloor((f) + xFixed1MinusE)

#define xFixedFraction(f)	((f) & xFixed1MinusE)
#define xFixedMod2(f)		((f) & (xFixed1 | xFixed1MinusE))

/* whether 't' is a well defined not obviously empty trapezoid */
#define xTrapezoidValid(t)  ((t)->left.p1.y != (t)->left.p2.y && \
			     (t)->right.p1.y != (t)->right.p2.y && \
			     (int) ((t)->bottom - (t)->top) > 0)

/*
 * 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 CvtR8G8B8toY15(s)	(((((s) >> 16) & 0xff) * 153 + \
				  (((s) >>  8) & 0xff) * 301 + \
				  (((s)      ) & 0xff) * 58) >> 2)

#endif /* _PICTURE_H_ */

/* Macros needed by fbpict.c */

#define cvt8888to0565(s)    ((((s) >> 3) & 0x001f) | \
			     (((s) >> 5) & 0x07e0) | \
			     (((s) >> 8) & 0xf800))
#define cvt0565to0888(s)    (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) | \
			     ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) | \
			     ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))

#if IMAGE_BYTE_ORDER == MSBFirst
#define Fetch24(a)  ((unsigned long) (a) & 1 ? \
		     ((*(a) << 16) | *((CARD16 *) ((a)+1))) : \
		     ((*((CARD16 *) (a)) << 8) | *((a)+2)))
#define Store24(a,v) ((unsigned long) (a) & 1 ? \
		      ((*(a) = (CARD8) ((v) >> 16)), \
		       (*((CARD16 *) ((a)+1)) = (CARD16) (v))) : \
		      ((*((CARD16 *) (a)) = (CARD16) ((v) >> 8)), \
		       (*((a)+2) = (CARD8) (v))))
#else
#define Fetch24(a)  ((unsigned long) (a) & 1 ? \
		     ((*(a)) | (*((CARD16 *) ((a)+1)) << 8)) : \
		     ((*((CARD16 *) (a))) | (*((a)+2) << 16)))
#define Store24(a,v) ((unsigned long) (a) & 1 ? \
		      ((*(a) = (CARD8) (v)), \
		       (*((CARD16 *) ((a)+1)) = (CARD16) ((v) >> 8))) : \
		      ((*((CARD16 *) (a)) = (CARD16) (v)),\
		       (*((a)+2) = (CARD8) ((v) >> 16))))
#endif

#endif /* _ICINT_H_ */