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/* $Xorg: miwideline.h,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
/*
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"
/*
* interface data to span-merging polygon filler
*/
typedef struct _SpanData {
SpanGroup fgGroup, bgGroup;
} SpanDataRec, *SpanDataPtr;
#define AppendSpanGroup(pGC, pixel, spanPtr, spanData) { \
SpanGroup *group, *othergroup = NULL; \
if (pixel == pGC->fgPixel) \
{ \
group = &spanData->fgGroup; \
if (pGC->lineStyle == LineDoubleDash) \
othergroup = &spanData->bgGroup; \
} \
else \
{ \
group = &spanData->bgGroup; \
othergroup = &spanData->fgGroup; \
} \
miAppendSpans (group, othergroup, spanPtr); \
}
/*
* 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 MIPOLYRELOADLEFT if (!left_height && left_count) { \
left_height = left->height; \
left_x = left->x; \
left_stepx = left->stepx; \
left_signdx = left->signdx; \
left_e = left->e; \
left_dy = left->dy; \
left_dx = left->dx; \
--left_count; \
++left; \
}
#define MIPOLYRELOADRIGHT if (!right_height && right_count) { \
right_height = right->height; \
right_x = right->x; \
right_stepx = right->stepx; \
right_signdx = right->signdx; \
right_e = right->e; \
right_dy = right->dy; \
right_dx = right->dx; \
--right_count; \
++right; \
}
#define MIPOLYSTEPLEFT left_x += left_stepx; \
left_e += left_dx; \
if (left_e > 0) \
{ \
left_x += left_signdx; \
left_e -= left_dy; \
}
#define MIPOLYSTEPRIGHT right_x += right_stepx; \
right_e += right_dx; \
if (right_e > 0) \
{ \
right_x += right_signdx; \
right_e -= right_dy; \
}
#define MILINESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
oldPixel = pGC->fgPixel; \
if (pixel != oldPixel) { \
DoChangeGC (pGC, GCForeground, (XID *) &pixel, FALSE); \
ValidateGC (pDrawable, pGC); \
} \
}
#define MILINERESETPIXEL(pDrawable, pGC, pixel, oldPixel) { \
if (pixel != oldPixel) { \
DoChangeGC (pGC, GCForeground, (XID *) &oldPixel, FALSE); \
ValidateGC (pDrawable, pGC); \
} \
}
#ifdef NOINLINEICEIL
#define ICEIL(x) ((int)ceil(x))
#else
#ifdef __GNUC__
static __inline int ICEIL(x)
double x;
{
int _cTmp = x;
return ((x == _cTmp) || (x < 0.0)) ? _cTmp : _cTmp+1;
}
#else
#define ICEIL(x) ((((x) == (_cTmp = (x))) || ((x) < 0.0)) ? _cTmp : _cTmp+1)
#define ICEILTEMPDECL static int _cTmp;
#endif
#endif
extern void miFillPolyHelper(
#if NeedFunctionPrototypes
DrawablePtr /*pDrawable*/,
GCPtr /*pGC*/,
unsigned long /*pixel*/,
SpanDataPtr /*spanData*/,
int /*y*/,
int /*overall_height*/,
PolyEdgePtr /*left*/,
PolyEdgePtr /*right*/,
int /*left_count*/,
int /*right_count*/
#endif
);
extern int miRoundJoinFace(
#if NeedFunctionPrototypes
LineFacePtr /*face*/,
PolyEdgePtr /*edge*/,
Bool * /*leftEdge*/
#endif
);
extern void miRoundJoinClip(
#if NeedFunctionPrototypes
LineFacePtr /*pLeft*/,
LineFacePtr /*pRight*/,
PolyEdgePtr /*edge1*/,
PolyEdgePtr /*edge2*/,
int * /*y1*/,
int * /*y2*/,
Bool * /*left1*/,
Bool * /*left2*/
#endif
);
extern int miRoundCapClip(
#if NeedFunctionPrototypes
LineFacePtr /*face*/,
Bool /*isInt*/,
PolyEdgePtr /*edge*/,
Bool * /*leftEdge*/
#endif
);
extern void miLineProjectingCap(
#if NeedFunctionPrototypes
DrawablePtr /*pDrawable*/,
GCPtr /*pGC*/,
unsigned long /*pixel*/,
SpanDataPtr /*spanData*/,
LineFacePtr /*face*/,
Bool /*isLeft*/,
double /*xorg*/,
double /*yorg*/,
Bool /*isInt*/
#endif
);
extern SpanDataPtr miSetupSpanData(
#if NeedFunctionPrototypes
GCPtr /*pGC*/,
SpanDataPtr /*spanData*/,
int /*npt*/
#endif
);
extern void miCleanupSpanData(
#if NeedFunctionPrototypes
DrawablePtr /*pDrawable*/,
GCPtr /*pGC*/,
SpanDataPtr /*spanData*/
#endif
);
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