[deb_xorg-server.git] / mi / miwideline.h

/*

Copyright 1988, 1998  The Open Group

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.

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 OPEN GROUP 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 Open Group 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 Open Group.

*/

/* Author:  Keith Packard, MIT X Consortium */

#include "mispans.h"
#include "mifpoly.h"            /* for ICEIL */

/*
 * Polygon edge description for integer wide-line routines
 */

typedef struct _PolyEdge {
    int height;                 /* number of scanlines to process */
    int x;                      /* starting x coordinate */
    int stepx;                  /* fixed integral dx */
    int signdx;                 /* variable dx sign */
    int e;                      /* initial error term */
    int dy;
    int dx;
} PolyEdgeRec, *PolyEdgePtr;

#define SQSECANT 108.856472512142       /* 1/sin^2(11/2) - miter limit constant */

/*
 * types for general polygon routines
 */

typedef struct _PolyVertex {
    double x, y;
} PolyVertexRec, *PolyVertexPtr;

typedef struct _PolySlope {
    int dx, dy;
    double k;                   /* x0 * dy - y0 * dx */
} PolySlopeRec, *PolySlopePtr;

/*
 * Line face description for caps/joins
 */

typedef struct _LineFace {
    double xa, ya;
    int dx, dy;
    int x, y;
    double k;
} LineFaceRec, *LineFacePtr;

/*
 * macros for polygon fillers
 */

#define MILINESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
    oldPixel = pGC->fgPixel; \
    if (pixel != oldPixel) { \
	ChangeGCVal gcval; \
	gcval.val = pixel; \
	ChangeGC (NullClient, pGC, GCForeground, &gcval); \
	ValidateGC (pDrawable, pGC); \
    } \
}
#define MILINERESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
    if (pixel != oldPixel) { \
	ChangeGCVal gcval; \
	gcval.val = oldPixel; \
	ChangeGC (NullClient, pGC, GCForeground, &gcval); \
	ValidateGC (pDrawable, pGC); \
    } \
}

extern _X_EXPORT void miRoundJoinClip(LineFacePtr /*pLeft */ ,
                                      LineFacePtr /*pRight */ ,
                                      PolyEdgePtr /*edge1 */ ,
                                      PolyEdgePtr /*edge2 */ ,
                                      int * /*y1 */ ,
                                      int * /*y2 */ ,
                                      Bool * /*left1 */ ,
                                      Bool *    /*left2 */
    );

extern _X_EXPORT int miRoundCapClip(LineFacePtr /*face */ ,
                                    Bool /*isInt */ ,
                                    PolyEdgePtr /*edge */ ,
                                    Bool *      /*leftEdge */
    );

extern _X_EXPORT int miPolyBuildEdge(double x0, double y0, double k, int dx,
                                     int dy, int xi, int yi, int left,
                                     PolyEdgePtr edge);
extern _X_EXPORT int miPolyBuildPoly(PolyVertexPtr vertices,
                                     PolySlopePtr slopes, int count, int xi,
                                     int yi, PolyEdgePtr left,
                                     PolyEdgePtr right, int *pnleft,
                                     int *pnright, int *h);
Commit	Line	Data
a09e091a JB	1	/*
	2
	3	Copyright 1988, 1998 The Open Group
	4
	5	Permission to use, copy, modify, distribute, and sell this software and its
	6	documentation for any purpose is hereby granted without fee, provided that
	7	the above copyright notice appear in all copies and that both that
	8	copyright notice and this permission notice appear in supporting
	9	documentation.
	10
	11	The above copyright notice and this permission notice shall be included
	12	in all copies or substantial portions of the Software.
	13
	14	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	15	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	16	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	17	IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	OTHER DEALINGS IN THE SOFTWARE.
	21
	22	Except as contained in this notice, the name of The Open Group shall
	23	not be used in advertising or otherwise to promote the sale, use or
	24	other dealings in this Software without prior written authorization
	25	from The Open Group.
	26
	27	*/
	28
	29	/* Author: Keith Packard, MIT X Consortium */
	30
	31	#include "mispans.h"
	32	#include "mifpoly.h" /* for ICEIL */
	33
	34	/*
	35	* Polygon edge description for integer wide-line routines
	36	*/
	37
	38	typedef struct _PolyEdge {
	39	int height; /* number of scanlines to process */
	40	int x; /* starting x coordinate */
	41	int stepx; /* fixed integral dx */
	42	int signdx; /* variable dx sign */
	43	int e; /* initial error term */
	44	int dy;
	45	int dx;
	46	} PolyEdgeRec, *PolyEdgePtr;
	47
	48	#define SQSECANT 108.856472512142 /* 1/sin^2(11/2) - miter limit constant */
	49
	50	/*
	51	* types for general polygon routines
	52	*/
	53
	54	typedef struct _PolyVertex {
	55	double x, y;
	56	} PolyVertexRec, *PolyVertexPtr;
	57
	58	typedef struct _PolySlope {
	59	int dx, dy;
	60	double k; /* x0 * dy - y0 * dx */
	61	} PolySlopeRec, *PolySlopePtr;
	62
	63	/*
	64	* Line face description for caps/joins
65	*/
66
67	typedef struct _LineFace {
68	double xa, ya;
69	int dx, dy;
70	int x, y;
71	double k;
72	} LineFaceRec, *LineFacePtr;
73
74	/*
75	* macros for polygon fillers
76	*/
77
78	#define MILINESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
79	oldPixel = pGC->fgPixel; \
80	if (pixel != oldPixel) { \
81	ChangeGCVal gcval; \
82	gcval.val = pixel; \
83	ChangeGC (NullClient, pGC, GCForeground, &gcval); \
84	ValidateGC (pDrawable, pGC); \
85	} \
86	}
87	#define MILINERESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
88	if (pixel != oldPixel) { \
89	ChangeGCVal gcval; \
90	gcval.val = oldPixel; \
91	ChangeGC (NullClient, pGC, GCForeground, &gcval); \
92	ValidateGC (pDrawable, pGC); \
93	} \
94	}
95
96	extern _X_EXPORT void miRoundJoinClip(LineFacePtr /pLeft / ,
97	LineFacePtr /pRight / ,
98	PolyEdgePtr /edge1 / ,
99	PolyEdgePtr /edge2 / ,
100	int * /y1 / ,
101	int * /y2 / ,
102	Bool * /left1 / ,
103	Bool * /left2 /
104	);
105
106	extern _X_EXPORT int miRoundCapClip(LineFacePtr /face / ,
107	Bool /isInt / ,
108	PolyEdgePtr /edge / ,
109	Bool * /leftEdge /
110	);
111
112	extern _X_EXPORT int miPolyBuildEdge(double x0, double y0, double k, int dx,
113	int dy, int xi, int yi, int left,
114	PolyEdgePtr edge);
115	extern _X_EXPORT int miPolyBuildPoly(PolyVertexPtr vertices,
116	PolySlopePtr slopes, int count, int xi,
117	int yi, PolyEdgePtr left,
118	PolyEdgePtr right, int *pnleft,
119	int pnright, int h);