+++ /dev/null
-/* $XConsortium: miwideline.c /main/58 1996/08/12 21:51:21 dpw $ */
-/*
-
-Copyright (c) 1988 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-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 X CONSORTIUM 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 X Consortium 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 X Consortium.
-
-*/
-/* $XFree86: xc/programs/Xserver/mi/miwideline.c,v 1.1.1.3.2.2 1998/02/01 22:08:22 robin Exp $ */
-
-/* Author: Keith Packard, MIT X Consortium */
-
-/*
- * Mostly integer wideline code. Uses a technique similar to
- * bresenham zero-width lines, except walks an X edge
- */
-
-#include <stdio.h>
-#ifdef _XOPEN_SOURCE
-#include <math.h>
-#else
-#define _XOPEN_SOURCE /* to get prototype for hypot on some systems */
-#include <math.h>
-#undef _XOPEN_SOURCE
-#endif
-#include "X.h"
-#include "windowstr.h"
-#include "gcstruct.h"
-#include "miscstruct.h"
-#include "miwideline.h"
-#include "mi.h"
-
-#ifdef ICEILTEMPDECL
-ICEILTEMPDECL
-#endif
-
-static void miLineArc();
-
-/*
- * spans-based polygon filler
- */
-
-void
-miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, overall_height,
- left, right, left_count, right_count)
- DrawablePtr pDrawable;
- GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- int y; /* start y coordinate */
- int overall_height; /* height of entire segment */
- PolyEdgePtr left, right;
- int left_count, right_count;
-{
- register int left_x, left_e;
- int left_stepx;
- int left_signdx;
- int left_dy, left_dx;
-
- register int right_x, right_e;
- int right_stepx;
- int right_signdx;
- int right_dy, right_dx;
-
- int height;
- int left_height, right_height;
-
- register DDXPointPtr ppt;
- DDXPointPtr pptInit;
- register int *pwidth;
- int *pwidthInit;
- XID oldPixel;
- int xorg;
- Spans spanRec;
-
- left_height = 0;
- right_height = 0;
-
- if (!spanData)
- {
- pptInit = (DDXPointPtr) ALLOCATE_LOCAL (overall_height * sizeof(*ppt));
- if (!pptInit)
- return;
- pwidthInit = (int *) ALLOCATE_LOCAL (overall_height * sizeof(*pwidth));
- if (!pwidthInit)
- {
- DEALLOCATE_LOCAL (pptInit);
- return;
- }
- ppt = pptInit;
- pwidth = pwidthInit;
- oldPixel = pGC->fgPixel;
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, (XID *)&pixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- }
- else
- {
- spanRec.points = (DDXPointPtr) xalloc (overall_height * sizeof (*ppt));
- if (!spanRec.points)
- return;
- spanRec.widths = (int *) xalloc (overall_height * sizeof (int));
- if (!spanRec.widths)
- {
- xfree (spanRec.points);
- return;
- }
- ppt = spanRec.points;
- pwidth = spanRec.widths;
- }
-
- xorg = 0;
- if (pGC->miTranslate)
- {
- y += pDrawable->y;
- xorg = pDrawable->x;
- }
- while ((left_count || left_height) &&
- (right_count || right_height))
- {
- MIPOLYRELOADLEFT
- MIPOLYRELOADRIGHT
-
- height = left_height;
- if (height > right_height)
- height = right_height;
-
- left_height -= height;
- right_height -= height;
-
- while (--height >= 0)
- {
- if (right_x >= left_x)
- {
- ppt->y = y;
- ppt->x = left_x + xorg;
- ppt++;
- *pwidth++ = right_x - left_x + 1;
- }
- y++;
-
- MIPOLYSTEPLEFT
-
- MIPOLYSTEPRIGHT
- }
- }
- if (!spanData)
- {
- (*pGC->ops->FillSpans) (pDrawable, pGC, ppt - pptInit, pptInit, pwidthInit, TRUE);
- DEALLOCATE_LOCAL (pwidthInit);
- DEALLOCATE_LOCAL (pptInit);
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, &oldPixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- }
- else
- {
- spanRec.count = ppt - spanRec.points;
- AppendSpanGroup (pGC, pixel, &spanRec, spanData)
- }
-}
-
-static void
-miFillRectPolyHelper (pDrawable, pGC, pixel, spanData, x, y, w, h)
- DrawablePtr pDrawable;
- GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- int x, y, w, h;
-{
- register DDXPointPtr ppt;
- register int *pwidth;
- XID oldPixel;
- Spans spanRec;
- xRectangle rect;
-
- if (!spanData)
- {
- rect.x = x;
- rect.y = y;
- rect.width = w;
- rect.height = h;
- oldPixel = pGC->fgPixel;
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, (XID *)&pixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- (*pGC->ops->PolyFillRect) (pDrawable, pGC, 1, &rect);
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, &oldPixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- }
- else
- {
- spanRec.points = (DDXPointPtr) xalloc (h * sizeof (*ppt));
- if (!spanRec.points)
- return;
- spanRec.widths = (int *) xalloc (h * sizeof (int));
- if (!spanRec.widths)
- {
- xfree (spanRec.points);
- return;
- }
- ppt = spanRec.points;
- pwidth = spanRec.widths;
-
- if (pGC->miTranslate)
- {
- y += pDrawable->y;
- x += pDrawable->x;
- }
- while (h--)
- {
- ppt->x = x;
- ppt->y = y;
- ppt++;
- *pwidth++ = w;
- y++;
- }
- spanRec.count = ppt - spanRec.points;
- AppendSpanGroup (pGC, pixel, &spanRec, spanData)
- }
-}
-
-int
-miPolyBuildEdge (x0, y0, k, dx, dy, xi, yi, left, edge)
- double x0, y0;
- double k; /* x0 * dy - y0 * dx */
- register int dx, dy;
- int xi, yi;
- int left;
- register PolyEdgePtr edge;
-{
- int x, y, e;
- int xady;
-
- if (dy < 0)
- {
- dy = -dy;
- dx = -dx;
- k = -k;
- }
-
-#ifdef NOTDEF
- {
- double realk, kerror;
- realk = x0 * dy - y0 * dx;
- kerror = Fabs (realk - k);
- if (kerror > .1)
- printf ("realk: %g k: %g\n", realk, k);
- }
-#endif
- y = ICEIL (y0);
- xady = ICEIL (k) + y * dx;
-
- if (xady <= 0)
- x = - (-xady / dy) - 1;
- else
- x = (xady - 1) / dy;
-
- e = xady - x * dy;
-
- if (dx >= 0)
- {
- edge->signdx = 1;
- edge->stepx = dx / dy;
- edge->dx = dx % dy;
- }
- else
- {
- edge->signdx = -1;
- edge->stepx = - (-dx / dy);
- edge->dx = -dx % dy;
- e = dy - e + 1;
- }
- edge->dy = dy;
- edge->x = x + left + xi;
- edge->e = e - dy; /* bias to compare against 0 instead of dy */
- return y + yi;
-}
-
-#define StepAround(v, incr, max) (((v) + (incr) < 0) ? (max - 1) : ((v) + (incr) == max) ? 0 : ((v) + (incr)))
-
-int
-miPolyBuildPoly (vertices, slopes, count, xi, yi, left, right, pnleft, pnright, h)
- register PolyVertexPtr vertices;
- register PolySlopePtr slopes;
- int count;
- int xi, yi;
- PolyEdgePtr left, right;
- int *pnleft, *pnright;
- int *h;
-{
- int top, bottom;
- double miny, maxy;
- register int i;
- int j;
- int clockwise;
- int slopeoff;
- register int s;
- register int nright, nleft;
- int y, lasty, bottomy, topy;
-
- /* find the top of the polygon */
- maxy = miny = vertices[0].y;
- bottom = top = 0;
- for (i = 1; i < count; i++)
- {
- if (vertices[i].y < miny)
- {
- top = i;
- miny = vertices[i].y;
- }
- if (vertices[i].y >= maxy)
- {
- bottom = i;
- maxy = vertices[i].y;
- }
- }
- clockwise = 1;
- slopeoff = 0;
-
- i = top;
- j = StepAround (top, -1, count);
-
- if (slopes[j].dy * slopes[i].dx > slopes[i].dy * slopes[j].dx)
- {
- clockwise = -1;
- slopeoff = -1;
- }
-
- bottomy = ICEIL (maxy) + yi;
-
- nright = 0;
-
- s = StepAround (top, slopeoff, count);
- i = top;
- while (i != bottom)
- {
- if (slopes[s].dy != 0)
- {
- y = miPolyBuildEdge (vertices[i].x, vertices[i].y,
- slopes[s].k,
- slopes[s].dx, slopes[s].dy,
- xi, yi, 0,
- &right[nright]);
- if (nright != 0)
- right[nright-1].height = y - lasty;
- else
- topy = y;
- nright++;
- lasty = y;
- }
-
- i = StepAround (i, clockwise, count);
- s = StepAround (s, clockwise, count);
- }
- if (nright != 0)
- right[nright-1].height = bottomy - lasty;
-
- if (slopeoff == 0)
- slopeoff = -1;
- else
- slopeoff = 0;
-
- nleft = 0;
- s = StepAround (top, slopeoff, count);
- i = top;
- while (i != bottom)
- {
- if (slopes[s].dy != 0)
- {
- y = miPolyBuildEdge (vertices[i].x, vertices[i].y,
- slopes[s].k,
- slopes[s].dx, slopes[s].dy, xi, yi, 1,
- &left[nleft]);
-
- if (nleft != 0)
- left[nleft-1].height = y - lasty;
- nleft++;
- lasty = y;
- }
- i = StepAround (i, -clockwise, count);
- s = StepAround (s, -clockwise, count);
- }
- if (nleft != 0)
- left[nleft-1].height = bottomy - lasty;
- *pnleft = nleft;
- *pnright = nright;
- *h = bottomy - topy;
- return topy;
-}
-
-static void
-miLineOnePoint (pDrawable, pGC, pixel, spanData, x, y)
- DrawablePtr pDrawable;
- GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- int x, y;
-{
- DDXPointRec pt;
- int wid;
- unsigned long oldPixel;
-
- MILINESETPIXEL (pDrawable, pGC, pixel, oldPixel);
- if (pGC->fillStyle == FillSolid)
- {
- pt.x = x;
- pt.y = y;
- (*pGC->ops->PolyPoint) (pDrawable, pGC, CoordModeOrigin, 1, &pt);
- }
- else
- {
- wid = 1;
- if (pGC->miTranslate)
- {
- x += pDrawable->x;
- y += pDrawable->y;
- }
- pt.x = x;
- pt.y = y;
- (*pGC->ops->FillSpans) (pDrawable, pGC, 1, &pt, &wid, TRUE);
- }
- MILINERESETPIXEL (pDrawable, pGC, pixel, oldPixel);
-}
-
-static void
-miLineJoin (pDrawable, pGC, pixel, spanData, pLeft, pRight)
- DrawablePtr pDrawable;
- GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- register LineFacePtr pLeft, pRight;
-{
- double mx, my;
- double denom;
- PolyVertexRec vertices[4];
- PolySlopeRec slopes[4];
- int edgecount;
- PolyEdgeRec left[4], right[4];
- int nleft, nright;
- int y, height;
- int swapslopes;
- int joinStyle = pGC->joinStyle;
- int lw = pGC->lineWidth;
-
- if (lw == 1 && !spanData) {
- /* Lines going in the same direction have no join */
- if (pLeft->dx >= 0 == pRight->dx <= 0)
- return;
- if (joinStyle != JoinRound) {
- denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
- if (denom == 0)
- return; /* no join to draw */
- }
- if (joinStyle != JoinMiter) {
- miLineOnePoint (pDrawable, pGC, pixel, spanData, pLeft->x, pLeft->y);
- return;
- }
- } else {
- if (joinStyle == JoinRound)
- {
- miLineArc(pDrawable, pGC, pixel, spanData,
- pLeft, pRight,
- (double)0.0, (double)0.0, TRUE);
- return;
- }
- denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
- if (denom == 0.0)
- return; /* no join to draw */
- }
-
- swapslopes = 0;
- if (denom > 0)
- {
- pLeft->xa = -pLeft->xa;
- pLeft->ya = -pLeft->ya;
- pLeft->dx = -pLeft->dx;
- pLeft->dy = -pLeft->dy;
- }
- else
- {
- swapslopes = 1;
- pRight->xa = -pRight->xa;
- pRight->ya = -pRight->ya;
- pRight->dx = -pRight->dx;
- pRight->dy = -pRight->dy;
- }
-
- vertices[0].x = pRight->xa;
- vertices[0].y = pRight->ya;
- slopes[0].dx = -pRight->dy;
- slopes[0].dy = pRight->dx;
- slopes[0].k = 0;
-
- vertices[1].x = 0;
- vertices[1].y = 0;
- slopes[1].dx = pLeft->dy;
- slopes[1].dy = -pLeft->dx;
- slopes[1].k = 0;
-
- vertices[2].x = pLeft->xa;
- vertices[2].y = pLeft->ya;
-
- if (joinStyle == JoinMiter)
- {
- my = (pLeft->dy * (pRight->xa * pRight->dy - pRight->ya * pRight->dx) -
- pRight->dy * (pLeft->xa * pLeft->dy - pLeft->ya * pLeft->dx )) /
- denom;
- if (pLeft->dy != 0)
- {
- mx = pLeft->xa + (my - pLeft->ya) *
- (double) pLeft->dx / (double) pLeft->dy;
- }
- else
- {
- mx = pRight->xa + (my - pRight->ya) *
- (double) pRight->dx / (double) pRight->dy;
- }
- /* check miter limit */
- if ((mx * mx + my * my) * 4 > SQSECANT * lw * lw)
- joinStyle = JoinBevel;
- }
-
- if (joinStyle == JoinMiter)
- {
- slopes[2].dx = pLeft->dx;
- slopes[2].dy = pLeft->dy;
- slopes[2].k = pLeft->k;
- if (swapslopes)
- {
- slopes[2].dx = -slopes[2].dx;
- slopes[2].dy = -slopes[2].dy;
- slopes[2].k = -slopes[2].k;
- }
- vertices[3].x = mx;
- vertices[3].y = my;
- slopes[3].dx = pRight->dx;
- slopes[3].dy = pRight->dy;
- slopes[3].k = pRight->k;
- if (swapslopes)
- {
- slopes[3].dx = -slopes[3].dx;
- slopes[3].dy = -slopes[3].dy;
- slopes[3].k = -slopes[3].k;
- }
- edgecount = 4;
- }
- else
- {
- double scale, dx, dy, adx, ady;
-
- adx = dx = pRight->xa - pLeft->xa;
- ady = dy = pRight->ya - pLeft->ya;
- if (adx < 0)
- adx = -adx;
- if (ady < 0)
- ady = -ady;
- scale = ady;
- if (adx > ady)
- scale = adx;
- slopes[2].dx = (dx * 65536) / scale;
- slopes[2].dy = (dy * 65536) / scale;
- slopes[2].k = ((pLeft->xa + pRight->xa) * slopes[2].dy -
- (pLeft->ya + pRight->ya) * slopes[2].dx) / 2.0;
- edgecount = 3;
- }
-
- y = miPolyBuildPoly (vertices, slopes, edgecount, pLeft->x, pLeft->y,
- left, right, &nleft, &nright, &height);
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, height, left, right, nleft, nright);
-}
-
-static int
-miLineArcI (pDraw, pGC, xorg, yorg, points, widths)
- DrawablePtr pDraw;
- GCPtr pGC;
- int xorg, yorg;
- DDXPointPtr points;
- int *widths;
-{
- register DDXPointPtr tpts, bpts;
- register int *twids, *bwids;
- register int x, y, e, ex, slw;
-
- tpts = points;
- twids = widths;
- if (pGC->miTranslate)
- {
- xorg += pDraw->x;
- yorg += pDraw->y;
- }
- slw = pGC->lineWidth;
- if (slw == 1)
- {
- tpts->x = xorg;
- tpts->y = yorg;
- *twids = 1;
- return 1;
- }
- bpts = tpts + slw;
- bwids = twids + slw;
- y = (slw >> 1) + 1;
- if (slw & 1)
- e = - ((y << 2) + 3);
- else
- e = - (y << 3);
- ex = -4;
- x = 0;
- while (y)
- {
- e += (y << 3) - 4;
- while (e >= 0)
- {
- x++;
- e += (ex = -((x << 3) + 4));
- }
- y--;
- slw = (x << 1) + 1;
- if ((e == ex) && (slw > 1))
- slw--;
- tpts->x = xorg - x;
- tpts->y = yorg - y;
- tpts++;
- *twids++ = slw;
- if ((y != 0) && ((slw > 1) || (e != ex)))
- {
- bpts--;
- bpts->x = xorg - x;
- bpts->y = yorg + y;
- *--bwids = slw;
- }
- }
- return (pGC->lineWidth);
-}
-
-#define CLIPSTEPEDGE(edgey,edge,edgeleft) \
- if (ybase == edgey) \
- { \
- if (edgeleft) \
- { \
- if (edge->x > xcl) \
- xcl = edge->x; \
- } \
- else \
- { \
- if (edge->x < xcr) \
- xcr = edge->x; \
- } \
- edgey++; \
- edge->x += edge->stepx; \
- edge->e += edge->dx; \
- if (edge->e > 0) \
- { \
- edge->x += edge->signdx; \
- edge->e -= edge->dy; \
- } \
- }
-
-static int
-miLineArcD (pDraw, pGC, xorg, yorg, points, widths,
- edge1, edgey1, edgeleft1, edge2, edgey2, edgeleft2)
- DrawablePtr pDraw;
- GCPtr pGC;
- double xorg, yorg;
- DDXPointPtr points;
- int *widths;
- PolyEdgePtr edge1, edge2;
- int edgey1, edgey2;
- Bool edgeleft1, edgeleft2;
-{
- register DDXPointPtr pts;
- register int *wids;
- double radius, x0, y0, el, er, yk, xlk, xrk, k;
- int xbase, ybase, y, boty, xl, xr, xcl, xcr;
- int ymin, ymax;
- Bool edge1IsMin, edge2IsMin;
- int ymin1, ymin2;
-
- pts = points;
- wids = widths;
- xbase = floor(xorg);
- x0 = xorg - xbase;
- ybase = ICEIL (yorg);
- y0 = yorg - ybase;
- if (pGC->miTranslate)
- {
- xbase += pDraw->x;
- ybase += pDraw->y;
- edge1->x += pDraw->x;
- edge2->x += pDraw->x;
- edgey1 += pDraw->y;
- edgey2 += pDraw->y;
- }
- xlk = x0 + x0 + 1.0;
- xrk = x0 + x0 - 1.0;
- yk = y0 + y0 - 1.0;
- radius = ((double)pGC->lineWidth) / 2.0;
- y = floor(radius - y0 + 1.0);
- ybase -= y;
- ymin = ybase;
- ymax = 65536;
- edge1IsMin = FALSE;
- ymin1 = edgey1;
- if (edge1->dy >= 0)
- {
- if (!edge1->dy)
- {
- if (edgeleft1)
- edge1IsMin = TRUE;
- else
- ymax = edgey1;
- edgey1 = 65536;
- }
- else
- {
- if ((edge1->signdx < 0) == edgeleft1)
- edge1IsMin = TRUE;
- }
- }
- edge2IsMin = FALSE;
- ymin2 = edgey2;
- if (edge2->dy >= 0)
- {
- if (!edge2->dy)
- {
- if (edgeleft2)
- edge2IsMin = TRUE;
- else
- ymax = edgey2;
- edgey2 = 65536;
- }
- else
- {
- if ((edge2->signdx < 0) == edgeleft2)
- edge2IsMin = TRUE;
- }
- }
- if (edge1IsMin)
- {
- ymin = ymin1;
- if (edge2IsMin && ymin1 > ymin2)
- ymin = ymin2;
- } else if (edge2IsMin)
- ymin = ymin2;
- el = radius * radius - ((y + y0) * (y + y0)) - (x0 * x0);
- er = el + xrk;
- xl = 1;
- xr = 0;
- if (x0 < 0.5)
- {
- xl = 0;
- el -= xlk;
- }
- boty = (y0 < -0.5) ? 1 : 0;
- if (ybase + y - boty > ymax)
- boty = ymax - ybase - y;
- while (y > boty)
- {
- k = (y << 1) + yk;
- er += k;
- while (er > 0.0)
- {
- xr++;
- er += xrk - (xr << 1);
- }
- el += k;
- while (el >= 0.0)
- {
- xl--;
- el += (xl << 1) - xlk;
- }
- y--;
- ybase++;
- if (ybase < ymin)
- continue;
- xcl = xl + xbase;
- xcr = xr + xbase;
- CLIPSTEPEDGE(edgey1, edge1, edgeleft1);
- CLIPSTEPEDGE(edgey2, edge2, edgeleft2);
- if (xcr >= xcl)
- {
- pts->x = xcl;
- pts->y = ybase;
- pts++;
- *wids++ = xcr - xcl + 1;
- }
- }
- er = xrk - (xr << 1) - er;
- el = (xl << 1) - xlk - el;
- boty = floor(-y0 - radius + 1.0);
- if (ybase + y - boty > ymax)
- boty = ymax - ybase - y;
- while (y > boty)
- {
- k = (y << 1) + yk;
- er -= k;
- while ((er >= 0.0) && (xr >= 0))
- {
- xr--;
- er += xrk - (xr << 1);
- }
- el -= k;
- while ((el > 0.0) && (xl <= 0))
- {
- xl++;
- el += (xl << 1) - xlk;
- }
- y--;
- ybase++;
- if (ybase < ymin)
- continue;
- xcl = xl + xbase;
- xcr = xr + xbase;
- CLIPSTEPEDGE(edgey1, edge1, edgeleft1);
- CLIPSTEPEDGE(edgey2, edge2, edgeleft2);
- if (xcr >= xcl)
- {
- pts->x = xcl;
- pts->y = ybase;
- pts++;
- *wids++ = xcr - xcl + 1;
- }
- }
- return (pts - points);
-}
-
-int
-miRoundJoinFace (face, edge, leftEdge)
- register LineFacePtr face;
- register PolyEdgePtr edge;
- Bool *leftEdge;
-{
- int y;
- int dx, dy;
- double xa, ya;
- Bool left;
-
- dx = -face->dy;
- dy = face->dx;
- xa = face->xa;
- ya = face->ya;
- left = 1;
- if (ya > 0)
- {
- ya = 0.0;
- xa = 0.0;
- }
- if (dy < 0 || dy == 0 && dx > 0)
- {
- dx = -dx;
- dy = -dy;
- left = !left;
- }
- if (dx == 0 && dy == 0)
- dy = 1;
- if (dy == 0)
- {
- y = ICEIL (face->ya) + face->y;
- edge->x = -32767;
- edge->stepx = 0;
- edge->signdx = 0;
- edge->e = -1;
- edge->dy = 0;
- edge->dx = 0;
- edge->height = 0;
- }
- else
- {
- y = miPolyBuildEdge (xa, ya, 0.0, dx, dy, face->x, face->y, !left, edge);
- edge->height = 32767;
- }
- *leftEdge = !left;
- return y;
-}
-
-void
-miRoundJoinClip (pLeft, pRight, edge1, edge2, y1, y2, left1, left2)
- register LineFacePtr pLeft, pRight;
- PolyEdgePtr edge1, edge2;
- int *y1, *y2;
- Bool *left1, *left2;
-{
- double denom;
-
- denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
-
- if (denom >= 0)
- {
- pLeft->xa = -pLeft->xa;
- pLeft->ya = -pLeft->ya;
- }
- else
- {
- pRight->xa = -pRight->xa;
- pRight->ya = -pRight->ya;
- }
- *y1 = miRoundJoinFace (pLeft, edge1, left1);
- *y2 = miRoundJoinFace (pRight, edge2, left2);
-}
-
-int
-miRoundCapClip (face, isInt, edge, leftEdge)
- register LineFacePtr face;
- Bool isInt;
- register PolyEdgePtr edge;
- Bool *leftEdge;
-{
- int y;
- register int dx, dy;
- double xa, ya, k;
- Bool left;
-
- dx = -face->dy;
- dy = face->dx;
- xa = face->xa;
- ya = face->ya;
- k = 0.0;
- if (!isInt)
- k = face->k;
- left = 1;
- if (dy < 0 || dy == 0 && dx > 0)
- {
- dx = -dx;
- dy = -dy;
- xa = -xa;
- ya = -ya;
- left = !left;
- }
- if (dx == 0 && dy == 0)
- dy = 1;
- if (dy == 0)
- {
- y = ICEIL (face->ya) + face->y;
- edge->x = -32767;
- edge->stepx = 0;
- edge->signdx = 0;
- edge->e = -1;
- edge->dy = 0;
- edge->dx = 0;
- edge->height = 0;
- }
- else
- {
- y = miPolyBuildEdge (xa, ya, k, dx, dy, face->x, face->y, !left, edge);
- edge->height = 32767;
- }
- *leftEdge = !left;
- return y;
-}
-
-static void
-miLineArc (pDraw, pGC, pixel, spanData, leftFace, rightFace, xorg, yorg, isInt)
- DrawablePtr pDraw;
- register GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- register LineFacePtr leftFace, rightFace;
- double xorg, yorg;
- Bool isInt;
-{
- DDXPointPtr points;
- int *widths;
- int xorgi, yorgi;
- XID oldPixel;
- Spans spanRec;
- int n;
- PolyEdgeRec edge1, edge2;
- int edgey1, edgey2;
- Bool edgeleft1, edgeleft2;
-
- if (isInt)
- {
- xorgi = leftFace ? leftFace->x : rightFace->x;
- yorgi = leftFace ? leftFace->y : rightFace->y;
- }
- edgey1 = 65536;
- edgey2 = 65536;
- edge1.x = 0; /* not used, keep memory checkers happy */
- edge1.dy = -1;
- edge2.x = 0; /* not used, keep memory checkers happy */
- edge2.dy = -1;
- edgeleft1 = FALSE;
- edgeleft2 = FALSE;
- if ((pGC->lineStyle != LineSolid || pGC->lineWidth > 2) &&
- (pGC->capStyle == CapRound && pGC->joinStyle != JoinRound ||
- pGC->joinStyle == JoinRound && pGC->capStyle == CapButt))
- {
- if (isInt)
- {
- xorg = (double) xorgi;
- yorg = (double) yorgi;
- }
- if (leftFace && rightFace)
- {
- miRoundJoinClip (leftFace, rightFace, &edge1, &edge2,
- &edgey1, &edgey2, &edgeleft1, &edgeleft2);
- }
- else if (leftFace)
- {
- edgey1 = miRoundCapClip (leftFace, isInt, &edge1, &edgeleft1);
- }
- else if (rightFace)
- {
- edgey2 = miRoundCapClip (rightFace, isInt, &edge2, &edgeleft2);
- }
- isInt = FALSE;
- }
- if (!spanData)
- {
- points = (DDXPointPtr)ALLOCATE_LOCAL(sizeof(DDXPointRec) * pGC->lineWidth);
- if (!points)
- return;
- widths = (int *)ALLOCATE_LOCAL(sizeof(int) * pGC->lineWidth);
- if (!widths)
- {
- DEALLOCATE_LOCAL(points);
- return;
- }
- oldPixel = pGC->fgPixel;
- if (pixel != oldPixel)
- {
- DoChangeGC(pGC, GCForeground, (XID *)&pixel, FALSE);
- ValidateGC (pDraw, pGC);
- }
- }
- else
- {
- points = (DDXPointPtr) xalloc (pGC->lineWidth * sizeof (DDXPointRec));
- if (!points)
- return;
- widths = (int *) xalloc (pGC->lineWidth * sizeof (int));
- if (!widths)
- {
- xfree (points);
- return;
- }
- spanRec.points = points;
- spanRec.widths = widths;
- }
- if (isInt)
- n = miLineArcI(pDraw, pGC, xorgi, yorgi, points, widths);
- else
- n = miLineArcD(pDraw, pGC, xorg, yorg, points, widths,
- &edge1, edgey1, edgeleft1,
- &edge2, edgey2, edgeleft2);
-
- if (!spanData)
- {
- (*pGC->ops->FillSpans)(pDraw, pGC, n, points, widths, TRUE);
- DEALLOCATE_LOCAL(widths);
- DEALLOCATE_LOCAL(points);
- if (pixel != oldPixel)
- {
- DoChangeGC(pGC, GCForeground, &oldPixel, FALSE);
- ValidateGC (pDraw, pGC);
- }
- }
- else
- {
- spanRec.count = n;
- AppendSpanGroup (pGC, pixel, &spanRec, spanData)
- }
-}
-
-void
-miLineProjectingCap (pDrawable, pGC, pixel, spanData, face, isLeft, xorg, yorg, isInt)
- DrawablePtr pDrawable;
- register GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- register LineFacePtr face;
- Bool isLeft;
- double xorg, yorg;
- Bool isInt;
-{
- int xorgi, yorgi;
- int lw;
- PolyEdgeRec lefts[2], rights[2];
- int lefty, righty, topy, bottomy;
- PolyEdgePtr left, right;
- PolyEdgePtr top, bottom;
- double xa,ya;
- double k;
- double xap, yap;
- int dx, dy;
- double projectXoff, projectYoff;
- double maxy;
- int finaly;
-
- if (isInt)
- {
- xorgi = face->x;
- yorgi = face->y;
- }
- lw = pGC->lineWidth;
- dx = face->dx;
- dy = face->dy;
- k = face->k;
- if (dy == 0)
- {
- lefts[0].height = lw;
- lefts[0].x = xorgi;
- if (isLeft)
- lefts[0].x -= (lw >> 1);
- lefts[0].stepx = 0;
- lefts[0].signdx = 1;
- lefts[0].e = -lw;
- lefts[0].dx = 0;
- lefts[0].dy = lw;
- rights[0].height = lw;
- rights[0].x = xorgi;
- if (!isLeft)
- rights[0].x += (lw + 1 >> 1);
- rights[0].stepx = 0;
- rights[0].signdx = 1;
- rights[0].e = -lw;
- rights[0].dx = 0;
- rights[0].dy = lw;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, yorgi - (lw >> 1), lw,
- lefts, rights, 1, 1);
- }
- else if (dx == 0)
- {
- topy = yorgi;
- bottomy = yorgi + dy;
- if (isLeft)
- topy -= (lw >> 1);
- else
- bottomy += (lw >> 1);
- lefts[0].height = bottomy - topy;
- lefts[0].x = xorgi - (lw >> 1);
- lefts[0].stepx = 0;
- lefts[0].signdx = 1;
- lefts[0].e = -dy;
- lefts[0].dx = dx;
- lefts[0].dy = dy;
-
- rights[0].height = bottomy - topy;
- rights[0].x = lefts[0].x + (lw-1);
- rights[0].stepx = 0;
- rights[0].signdx = 1;
- rights[0].e = -dy;
- rights[0].dx = dx;
- rights[0].dy = dy;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, topy, bottomy - topy, lefts, rights, 1, 1);
- }
- else
- {
- xa = face->xa;
- ya = face->ya;
- projectXoff = -ya;
- projectYoff = xa;
- if (dx < 0)
- {
- right = &rights[1];
- left = &lefts[0];
- top = &rights[0];
- bottom = &lefts[1];
- }
- else
- {
- right = &rights[0];
- left = &lefts[1];
- top = &lefts[0];
- bottom = &rights[1];
- }
- if (isLeft)
- {
- righty = miPolyBuildEdge (xa, ya,
- k, dx, dy, xorgi, yorgi, 0, right);
-
- xa = -xa;
- ya = -ya;
- k = -k;
- lefty = miPolyBuildEdge (xa - projectXoff, ya - projectYoff,
- k, dx, dy, xorgi, yorgi, 1, left);
- if (dx > 0)
- {
- ya = -ya;
- xa = -xa;
- }
- xap = xa - projectXoff;
- yap = ya - projectYoff;
- topy = miPolyBuildEdge (xap, yap, xap * dx + yap * dy,
- -dy, dx, xorgi, yorgi, dx > 0, top);
- bottomy = miPolyBuildEdge (xa, ya,
- 0.0, -dy, dx, xorgi, yorgi, dx < 0, bottom);
- maxy = -ya;
- }
- else
- {
- righty = miPolyBuildEdge (xa - projectXoff, ya - projectYoff,
- k, dx, dy, xorgi, yorgi, 0, right);
-
- xa = -xa;
- ya = -ya;
- k = -k;
- lefty = miPolyBuildEdge (xa, ya,
- k, dx, dy, xorgi, yorgi, 1, left);
- if (dx > 0)
- {
- ya = -ya;
- xa = -xa;
- }
- xap = xa - projectXoff;
- yap = ya - projectYoff;
- topy = miPolyBuildEdge (xa, ya, 0.0, -dy, dx, xorgi, xorgi, dx > 0, top);
- bottomy = miPolyBuildEdge (xap, yap, xap * dx + yap * dy,
- -dy, dx, xorgi, xorgi, dx < 0, bottom);
- maxy = -ya + projectYoff;
- }
- finaly = ICEIL(maxy) + yorgi;
- if (dx < 0)
- {
- left->height = bottomy - lefty;
- right->height = finaly - righty;
- top->height = righty - topy;
- }
- else
- {
- right->height = bottomy - righty;
- left->height = finaly - lefty;
- top->height = lefty - topy;
- }
- bottom->height = finaly - bottomy;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, topy,
- bottom->height + bottomy - topy, lefts, rights, 2, 2);
- }
-}
-
-static void
-miWideSegment (pDrawable, pGC, pixel, spanData,
- x1, y1, x2, y2, projectLeft, projectRight, leftFace, rightFace)
- DrawablePtr pDrawable;
- GCPtr pGC;
- unsigned long pixel;
- SpanDataPtr spanData;
- register int x1, y1, x2, y2;
- Bool projectLeft, projectRight;
- register LineFacePtr leftFace, rightFace;
-{
- double l, L, r;
- double xa, ya;
- double projectXoff, projectYoff;
- double k;
- double maxy;
- int x, y;
- int dx, dy;
- int finaly;
- PolyEdgePtr left, right;
- PolyEdgePtr top, bottom;
- int lefty, righty, topy, bottomy;
- int signdx;
- PolyEdgeRec lefts[2], rights[2];
- LineFacePtr tface;
- int lw = pGC->lineWidth;
-
- /* draw top-to-bottom always */
- if (y2 < y1 || y2 == y1 && x2 < x1)
- {
- x = x1;
- x1 = x2;
- x2 = x;
-
- y = y1;
- y1 = y2;
- y2 = y;
-
- x = projectLeft;
- projectLeft = projectRight;
- projectRight = x;
-
- tface = leftFace;
- leftFace = rightFace;
- rightFace = tface;
- }
-
- dy = y2 - y1;
- signdx = 1;
- dx = x2 - x1;
- if (dx < 0)
- signdx = -1;
-
- leftFace->x = x1;
- leftFace->y = y1;
- leftFace->dx = dx;
- leftFace->dy = dy;
-
- rightFace->x = x2;
- rightFace->y = y2;
- rightFace->dx = -dx;
- rightFace->dy = -dy;
-
- if (dy == 0)
- {
- rightFace->xa = 0;
- rightFace->ya = (double) lw / 2.0;
- rightFace->k = -(double) (lw * dx) / 2.0;
- leftFace->xa = 0;
- leftFace->ya = -rightFace->ya;
- leftFace->k = rightFace->k;
- x = x1;
- if (projectLeft)
- x -= (lw >> 1);
- y = y1 - (lw >> 1);
- dx = x2 - x;
- if (projectRight)
- dx += (lw + 1 >> 1);
- dy = lw;
- miFillRectPolyHelper (pDrawable, pGC, pixel, spanData,
- x, y, dx, dy);
- }
- else if (dx == 0)
- {
- leftFace->xa = (double) lw / 2.0;
- leftFace->ya = 0;
- leftFace->k = (double) (lw * dy) / 2.0;
- rightFace->xa = -leftFace->xa;
- rightFace->ya = 0;
- rightFace->k = leftFace->k;
- y = y1;
- if (projectLeft)
- y -= lw >> 1;
- x = x1 - (lw >> 1);
- dy = y2 - y;
- if (projectRight)
- dy += (lw + 1 >> 1);
- dx = lw;
- miFillRectPolyHelper (pDrawable, pGC, pixel, spanData,
- x, y, dx, dy);
- }
- else
- {
- l = ((double) lw) / 2.0;
- L = hypot ((double) dx, (double) dy);
-
- if (dx < 0)
- {
- right = &rights[1];
- left = &lefts[0];
- top = &rights[0];
- bottom = &lefts[1];
- }
- else
- {
- right = &rights[0];
- left = &lefts[1];
- top = &lefts[0];
- bottom = &rights[1];
- }
- r = l / L;
-
- /* coord of upper bound at integral y */
- ya = -r * dx;
- xa = r * dy;
-
- if (projectLeft | projectRight)
- {
- projectXoff = -ya;
- projectYoff = xa;
- }
-
- /* xa * dy - ya * dx */
- k = l * L;
-
- leftFace->xa = xa;
- leftFace->ya = ya;
- leftFace->k = k;
- rightFace->xa = -xa;
- rightFace->ya = -ya;
- rightFace->k = k;
-
- if (projectLeft)
- righty = miPolyBuildEdge (xa - projectXoff, ya - projectYoff,
- k, dx, dy, x1, y1, 0, right);
- else
- righty = miPolyBuildEdge (xa, ya,
- k, dx, dy, x1, y1, 0, right);
-
- /* coord of lower bound at integral y */
- ya = -ya;
- xa = -xa;
-
- /* xa * dy - ya * dx */
- k = - k;
-
- if (projectLeft)
- lefty = miPolyBuildEdge (xa - projectXoff, ya - projectYoff,
- k, dx, dy, x1, y1, 1, left);
- else
- lefty = miPolyBuildEdge (xa, ya,
- k, dx, dy, x1, y1, 1, left);
-
- /* coord of top face at integral y */
-
- if (signdx > 0)
- {
- ya = -ya;
- xa = -xa;
- }
-
- if (projectLeft)
- {
- double xap = xa - projectXoff;
- double yap = ya - projectYoff;
- topy = miPolyBuildEdge (xap, yap, xap * dx + yap * dy,
- -dy, dx, x1, y1, dx > 0, top);
- }
- else
- topy = miPolyBuildEdge (xa, ya, 0.0, -dy, dx, x1, y1, dx > 0, top);
-
- /* coord of bottom face at integral y */
-
- if (projectRight)
- {
- double xap = xa + projectXoff;
- double yap = ya + projectYoff;
- bottomy = miPolyBuildEdge (xap, yap, xap * dx + yap * dy,
- -dy, dx, x2, y2, dx < 0, bottom);
- maxy = -ya + projectYoff;
- }
- else
- {
- bottomy = miPolyBuildEdge (xa, ya,
- 0.0, -dy, dx, x2, y2, dx < 0, bottom);
- maxy = -ya;
- }
-
- finaly = ICEIL (maxy) + y2;
-
- if (dx < 0)
- {
- left->height = bottomy - lefty;
- right->height = finaly - righty;
- top->height = righty - topy;
- }
- else
- {
- right->height = bottomy - righty;
- left->height = finaly - lefty;
- top->height = lefty - topy;
- }
- bottom->height = finaly - bottomy;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, topy,
- bottom->height + bottomy - topy, lefts, rights, 2, 2);
- }
-}
-
-SpanDataPtr
-miSetupSpanData (pGC, spanData, npt)
- register GCPtr pGC;
- SpanDataPtr spanData;
- int npt;
-{
- if (npt < 3 && pGC->capStyle != CapRound || miSpansEasyRop(pGC->alu))
- return (SpanDataPtr) NULL;
- if (pGC->lineStyle == LineDoubleDash)
- miInitSpanGroup (&spanData->bgGroup);
- miInitSpanGroup (&spanData->fgGroup);
- return spanData;
-}
-
-void
-miCleanupSpanData (pDrawable, pGC, spanData)
- DrawablePtr pDrawable;
- GCPtr pGC;
- SpanDataPtr spanData;
-{
- if (pGC->lineStyle == LineDoubleDash)
- {
- XID oldPixel, pixel;
-
- pixel = pGC->bgPixel;
- oldPixel = pGC->fgPixel;
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, &pixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- miFillUniqueSpanGroup (pDrawable, pGC, &spanData->bgGroup);
- miFreeSpanGroup (&spanData->bgGroup);
- if (pixel != oldPixel)
- {
- DoChangeGC (pGC, GCForeground, &oldPixel, FALSE);
- ValidateGC (pDrawable, pGC);
- }
- }
- miFillUniqueSpanGroup (pDrawable, pGC, &spanData->fgGroup);
- miFreeSpanGroup (&spanData->fgGroup);
-}
-
-void
-miWideLine (pDrawable, pGC, mode, npt, pPts)
- DrawablePtr pDrawable;
- register GCPtr pGC;
- int mode;
- register int npt;
- register DDXPointPtr pPts;
-{
- int x1, y1, x2, y2;
- SpanDataRec spanDataRec;
- SpanDataPtr spanData;
- unsigned long pixel;
- Bool projectLeft, projectRight;
- LineFaceRec leftFace, rightFace, prevRightFace;
- LineFaceRec firstFace;
- register int first;
- Bool somethingDrawn = FALSE;
- Bool selfJoin;
-
- spanData = miSetupSpanData (pGC, &spanDataRec, npt);
- pixel = pGC->fgPixel;
- x2 = pPts->x;
- y2 = pPts->y;
- first = TRUE;
- selfJoin = FALSE;
- if (npt > 1)
- {
- if (mode == CoordModePrevious)
- {
- int nptTmp;
- DDXPointPtr pPtsTmp;
-
- x1 = x2;
- y1 = y2;
- nptTmp = npt;
- pPtsTmp = pPts + 1;
- while (--nptTmp)
- {
- x1 += pPtsTmp->x;
- y1 += pPtsTmp->y;
- ++pPtsTmp;
- }
- if (x2 == x1 && y2 == y1)
- selfJoin = TRUE;
- }
- else if (x2 == pPts[npt-1].x && y2 == pPts[npt-1].y)
- {
- selfJoin = TRUE;
- }
- }
- projectLeft = pGC->capStyle == CapProjecting && !selfJoin;
- projectRight = FALSE;
- while (--npt)
- {
- x1 = x2;
- y1 = y2;
- ++pPts;
- x2 = pPts->x;
- y2 = pPts->y;
- if (mode == CoordModePrevious)
- {
- x2 += x1;
- y2 += y1;
- }
- if (x1 != x2 || y1 != y2)
- {
- somethingDrawn = TRUE;
- if (npt == 1 && pGC->capStyle == CapProjecting && !selfJoin)
- projectRight = TRUE;
- miWideSegment (pDrawable, pGC, pixel, spanData, x1, y1, x2, y2,
- projectLeft, projectRight, &leftFace, &rightFace);
- if (first)
- {
- if (selfJoin)
- firstFace = leftFace;
- else if (pGC->capStyle == CapRound)
- {
- if (pGC->lineWidth == 1 && !spanData)
- miLineOnePoint (pDrawable, pGC, pixel, spanData, x1, y1);
- else
- miLineArc (pDrawable, pGC, pixel, spanData,
- &leftFace, (LineFacePtr) NULL,
- (double)0.0, (double)0.0,
- TRUE);
- }
- }
- else
- {
- miLineJoin (pDrawable, pGC, pixel, spanData, &leftFace,
- &prevRightFace);
- }
- prevRightFace = rightFace;
- first = FALSE;
- projectLeft = FALSE;
- }
- if (npt == 1 && somethingDrawn)
- {
- if (selfJoin)
- miLineJoin (pDrawable, pGC, pixel, spanData, &firstFace,
- &rightFace);
- else if (pGC->capStyle == CapRound)
- {
- if (pGC->lineWidth == 1 && !spanData)
- miLineOnePoint (pDrawable, pGC, pixel, spanData, x2, y2);
- else
- miLineArc (pDrawable, pGC, pixel, spanData,
- (LineFacePtr) NULL, &rightFace,
- (double)0.0, (double)0.0,
- TRUE);
- }
- }
- }
- /* handle crock where all points are coincedent */
- if (!somethingDrawn)
- {
- projectLeft = pGC->capStyle == CapProjecting;
- miWideSegment (pDrawable, pGC, pixel, spanData,
- x2, y2, x2, y2, projectLeft, projectLeft,
- &leftFace, &rightFace);
- if (pGC->capStyle == CapRound)
- {
- miLineArc (pDrawable, pGC, pixel, spanData,
- &leftFace, (LineFacePtr) NULL,
- (double)0.0, (double)0.0,
- TRUE);
- rightFace.dx = -1; /* sleezy hack to make it work */
- miLineArc (pDrawable, pGC, pixel, spanData,
- (LineFacePtr) NULL, &rightFace,
- (double)0.0, (double)0.0,
- TRUE);
- }
- }
- if (spanData)
- miCleanupSpanData (pDrawable, pGC, spanData);
-}
-
-#define V_TOP 0
-#define V_RIGHT 1
-#define V_BOTTOM 2
-#define V_LEFT 3
-
-static void
-miWideDashSegment (pDrawable, pGC, spanData, pDashOffset, pDashIndex,
- x1, y1, x2, y2, projectLeft, projectRight, leftFace, rightFace)
- DrawablePtr pDrawable;
- register GCPtr pGC;
- int *pDashOffset, *pDashIndex;
- SpanDataPtr spanData;
- int x1, y1, x2, y2;
- Bool projectLeft, projectRight;
- LineFacePtr leftFace, rightFace;
-{
- int dashIndex, dashRemain;
- unsigned char *pDash;
- double L, l;
- double k;
- PolyVertexRec vertices[4];
- PolyVertexRec saveRight, saveBottom;
- PolySlopeRec slopes[4];
- PolyEdgeRec left[2], right[2];
- LineFaceRec lcapFace, rcapFace;
- int nleft, nright;
- int h;
- int y;
- int dy, dx;
- unsigned long pixel;
- double LRemain;
- double r;
- double rdx, rdy;
- double dashDx, dashDy;
- double saveK;
- Bool first = TRUE;
- double lcenterx, lcentery, rcenterx, rcentery;
- unsigned long fgPixel, bgPixel;
-
- dx = x2 - x1;
- dy = y2 - y1;
- dashIndex = *pDashIndex;
- pDash = pGC->dash;
- dashRemain = pDash[dashIndex] - *pDashOffset;
- fgPixel = pGC->fgPixel;
- bgPixel = pGC->bgPixel;
- if (pGC->fillStyle == FillOpaqueStippled ||
- pGC->fillStyle == FillTiled)
- {
- bgPixel = fgPixel;
- }
-
- l = ((double) pGC->lineWidth) / 2.0;
- if (dx == 0)
- {
- L = dy;
- rdx = 0;
- rdy = l;
- if (dy < 0)
- {
- L = -dy;
- rdy = -l;
- }
- }
- else if (dy == 0)
- {
- L = dx;
- rdx = l;
- rdy = 0;
- if (dx < 0)
- {
- L = -dx;
- rdx = -l;
- }
- }
- else
- {
- L = hypot ((double) dx, (double) dy);
- r = l / L;
-
- rdx = r * dx;
- rdy = r * dy;
- }
- k = l * L;
- LRemain = L;
- /* All position comments are relative to a line with dx and dy > 0,
- * but the code does not depend on this */
- /* top */
- slopes[V_TOP].dx = dx;
- slopes[V_TOP].dy = dy;
- slopes[V_TOP].k = k;
- /* right */
- slopes[V_RIGHT].dx = -dy;
- slopes[V_RIGHT].dy = dx;
- slopes[V_RIGHT].k = 0;
- /* bottom */
- slopes[V_BOTTOM].dx = -dx;
- slopes[V_BOTTOM].dy = -dy;
- slopes[V_BOTTOM].k = k;
- /* left */
- slopes[V_LEFT].dx = dy;
- slopes[V_LEFT].dy = -dx;
- slopes[V_LEFT].k = 0;
-
- /* preload the start coordinates */
- vertices[V_RIGHT].x = vertices[V_TOP].x = rdy;
- vertices[V_RIGHT].y = vertices[V_TOP].y = -rdx;
-
- vertices[V_BOTTOM].x = vertices[V_LEFT].x = -rdy;
- vertices[V_BOTTOM].y = vertices[V_LEFT].y = rdx;
-
- if (projectLeft)
- {
- vertices[V_TOP].x -= rdx;
- vertices[V_TOP].y -= rdy;
-
- vertices[V_LEFT].x -= rdx;
- vertices[V_LEFT].y -= rdy;
-
- slopes[V_LEFT].k = rdx * dx + rdy * dy;
- }
-
- lcenterx = x1;
- lcentery = y1;
-
- if (pGC->capStyle == CapRound)
- {
- lcapFace.dx = dx;
- lcapFace.dy = dy;
- lcapFace.x = x1;
- lcapFace.y = y1;
-
- rcapFace.dx = -dx;
- rcapFace.dy = -dy;
- rcapFace.x = x1;
- rcapFace.y = y1;
- }
- while (LRemain > dashRemain)
- {
- dashDx = (dashRemain * dx) / L;
- dashDy = (dashRemain * dy) / L;
-
- rcenterx = lcenterx + dashDx;
- rcentery = lcentery + dashDy;
-
- vertices[V_RIGHT].x += dashDx;
- vertices[V_RIGHT].y += dashDy;
-
- vertices[V_BOTTOM].x += dashDx;
- vertices[V_BOTTOM].y += dashDy;
-
- slopes[V_RIGHT].k = vertices[V_RIGHT].x * dx + vertices[V_RIGHT].y * dy;
-
- if (pGC->lineStyle == LineDoubleDash || !(dashIndex & 1))
- {
- if (pGC->lineStyle == LineOnOffDash &&
- pGC->capStyle == CapProjecting)
- {
- saveRight = vertices[V_RIGHT];
- saveBottom = vertices[V_BOTTOM];
- saveK = slopes[V_RIGHT].k;
-
- if (!first)
- {
- vertices[V_TOP].x -= rdx;
- vertices[V_TOP].y -= rdy;
-
- vertices[V_LEFT].x -= rdx;
- vertices[V_LEFT].y -= rdy;
-
- slopes[V_LEFT].k = vertices[V_LEFT].x *
- slopes[V_LEFT].dy -
- vertices[V_LEFT].y *
- slopes[V_LEFT].dx;
- }
-
- vertices[V_RIGHT].x += rdx;
- vertices[V_RIGHT].y += rdy;
-
- vertices[V_BOTTOM].x += rdx;
- vertices[V_BOTTOM].y += rdy;
-
- slopes[V_RIGHT].k = vertices[V_RIGHT].x *
- slopes[V_RIGHT].dy -
- vertices[V_RIGHT].y *
- slopes[V_RIGHT].dx;
- }
- y = miPolyBuildPoly (vertices, slopes, 4, x1, y1,
- left, right, &nleft, &nright, &h);
- pixel = (dashIndex & 1) ? bgPixel : fgPixel;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, h, left, right, nleft, nright);
-
- if (pGC->lineStyle == LineOnOffDash)
- {
- switch (pGC->capStyle)
- {
- case CapProjecting:
- vertices[V_BOTTOM] = saveBottom;
- vertices[V_RIGHT] = saveRight;
- slopes[V_RIGHT].k = saveK;
- break;
- case CapRound:
- if (!first)
- {
- if (dx < 0)
- {
- lcapFace.xa = -vertices[V_LEFT].x;
- lcapFace.ya = -vertices[V_LEFT].y;
- lcapFace.k = slopes[V_LEFT].k;
- }
- else
- {
- lcapFace.xa = vertices[V_TOP].x;
- lcapFace.ya = vertices[V_TOP].y;
- lcapFace.k = -slopes[V_LEFT].k;
- }
- miLineArc (pDrawable, pGC, pixel, spanData,
- &lcapFace, (LineFacePtr) NULL,
- lcenterx, lcentery, FALSE);
- }
- if (dx < 0)
- {
- rcapFace.xa = vertices[V_BOTTOM].x;
- rcapFace.ya = vertices[V_BOTTOM].y;
- rcapFace.k = slopes[V_RIGHT].k;
- }
- else
- {
- rcapFace.xa = -vertices[V_RIGHT].x;
- rcapFace.ya = -vertices[V_RIGHT].y;
- rcapFace.k = -slopes[V_RIGHT].k;
- }
- miLineArc (pDrawable, pGC, pixel, spanData,
- (LineFacePtr) NULL, &rcapFace,
- rcenterx, rcentery, FALSE);
- break;
- }
- }
- }
- LRemain -= dashRemain;
- ++dashIndex;
- if (dashIndex == pGC->numInDashList)
- dashIndex = 0;
- dashRemain = pDash[dashIndex];
-
- lcenterx = rcenterx;
- lcentery = rcentery;
-
- vertices[V_TOP] = vertices[V_RIGHT];
- vertices[V_LEFT] = vertices[V_BOTTOM];
- slopes[V_LEFT].k = -slopes[V_RIGHT].k;
- first = FALSE;
- }
-
- if (pGC->lineStyle == LineDoubleDash || !(dashIndex & 1))
- {
- vertices[V_TOP].x -= dx;
- vertices[V_TOP].y -= dy;
-
- vertices[V_LEFT].x -= dx;
- vertices[V_LEFT].y -= dy;
-
- vertices[V_RIGHT].x = rdy;
- vertices[V_RIGHT].y = -rdx;
-
- vertices[V_BOTTOM].x = -rdy;
- vertices[V_BOTTOM].y = rdx;
-
-
- if (projectRight)
- {
- vertices[V_RIGHT].x += rdx;
- vertices[V_RIGHT].y += rdy;
-
- vertices[V_BOTTOM].x += rdx;
- vertices[V_BOTTOM].y += rdy;
- slopes[V_RIGHT].k = vertices[V_RIGHT].x *
- slopes[V_RIGHT].dy -
- vertices[V_RIGHT].y *
- slopes[V_RIGHT].dx;
- }
- else
- slopes[V_RIGHT].k = 0;
-
- if (!first && pGC->lineStyle == LineOnOffDash &&
- pGC->capStyle == CapProjecting)
- {
- vertices[V_TOP].x -= rdx;
- vertices[V_TOP].y -= rdy;
-
- vertices[V_LEFT].x -= rdx;
- vertices[V_LEFT].y -= rdy;
- slopes[V_LEFT].k = vertices[V_LEFT].x *
- slopes[V_LEFT].dy -
- vertices[V_LEFT].y *
- slopes[V_LEFT].dx;
- }
- else
- slopes[V_LEFT].k += dx * dx + dy * dy;
-
-
- y = miPolyBuildPoly (vertices, slopes, 4, x2, y2,
- left, right, &nleft, &nright, &h);
-
- pixel = (dashIndex & 1) ? pGC->bgPixel : pGC->fgPixel;
- miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, h, left, right, nleft, nright);
- if (!first && pGC->lineStyle == LineOnOffDash &&
- pGC->capStyle == CapRound)
- {
- lcapFace.x = x2;
- lcapFace.y = y2;
- if (dx < 0)
- {
- lcapFace.xa = -vertices[V_LEFT].x;
- lcapFace.ya = -vertices[V_LEFT].y;
- lcapFace.k = slopes[V_LEFT].k;
- }
- else
- {
- lcapFace.xa = vertices[V_TOP].x;
- lcapFace.ya = vertices[V_TOP].y;
- lcapFace.k = -slopes[V_LEFT].k;
- }
- miLineArc (pDrawable, pGC, pixel, spanData,
- &lcapFace, (LineFacePtr) NULL,
- rcenterx, rcentery, FALSE);
- }
- }
- dashRemain = ((double) dashRemain) - LRemain;
- if (dashRemain == 0)
- {
- dashIndex++;
- if (dashIndex == pGC->numInDashList)
- dashIndex = 0;
- dashRemain = pDash[dashIndex];
- }
-
- leftFace->x = x1;
- leftFace->y = y1;
- leftFace->dx = dx;
- leftFace->dy = dy;
- leftFace->xa = rdy;
- leftFace->ya = -rdx;
- leftFace->k = k;
-
- rightFace->x = x2;
- rightFace->y = y2;
- rightFace->dx = -dx;
- rightFace->dy = -dy;
- rightFace->xa = -rdy;
- rightFace->ya = rdx;
- rightFace->k = k;
-
- *pDashIndex = dashIndex;
- *pDashOffset = pDash[dashIndex] - dashRemain;
-}
-
-void
-miWideDash (pDrawable, pGC, mode, npt, pPts)
- DrawablePtr pDrawable;
- register GCPtr pGC;
- int mode;
- register int npt;
- register DDXPointPtr pPts;
-{
- int x1, y1, x2, y2;
- unsigned long pixel;
- Bool projectLeft, projectRight;
- LineFaceRec leftFace, rightFace, prevRightFace;
- LineFaceRec firstFace;
- int first;
- int dashIndex, dashOffset;
- register int prevDashIndex;
- SpanDataRec spanDataRec;
- SpanDataPtr spanData;
- Bool somethingDrawn = FALSE;
- Bool selfJoin;
- Bool endIsFg, startIsFg, firstIsFg = FALSE, prevIsFg;
-
- /* XXX backward compatibility */
- if (pGC->lineWidth == 0)
- {
- miZeroDashLine (pDrawable, pGC, mode, npt, pPts);
- return;
- }
- if (pGC->lineStyle == LineDoubleDash &&
- (pGC->fillStyle == FillOpaqueStippled || pGC->fillStyle == FillTiled))
- {
- miWideLine (pDrawable, pGC, mode, npt, pPts);
- return;
- }
- if (npt == 0)
- return;
- spanData = miSetupSpanData (pGC, &spanDataRec, npt);
- x2 = pPts->x;
- y2 = pPts->y;
- first = TRUE;
- selfJoin = FALSE;
- if (mode == CoordModePrevious)
- {
- int nptTmp;
- DDXPointPtr pPtsTmp;
-
- x1 = x2;
- y1 = y2;
- nptTmp = npt;
- pPtsTmp = pPts + 1;
- while (--nptTmp)
- {
- x1 += pPtsTmp->x;
- y1 += pPtsTmp->y;
- ++pPtsTmp;
- }
- if (x2 == x1 && y2 == y1)
- selfJoin = TRUE;
- }
- else if (x2 == pPts[npt-1].x && y2 == pPts[npt-1].y)
- {
- selfJoin = TRUE;
- }
- projectLeft = pGC->capStyle == CapProjecting && !selfJoin;
- projectRight = FALSE;
- dashIndex = 0;
- dashOffset = 0;
- miStepDash ((int)pGC->dashOffset, &dashIndex,
- pGC->dash, (int)pGC->numInDashList, &dashOffset);
- while (--npt)
- {
- x1 = x2;
- y1 = y2;
- ++pPts;
- x2 = pPts->x;
- y2 = pPts->y;
- if (mode == CoordModePrevious)
- {
- x2 += x1;
- y2 += y1;
- }
- if (x1 != x2 || y1 != y2)
- {
- somethingDrawn = TRUE;
- if (npt == 1 && pGC->capStyle == CapProjecting &&
- (!selfJoin || !firstIsFg))
- projectRight = TRUE;
- prevDashIndex = dashIndex;
- miWideDashSegment (pDrawable, pGC, spanData, &dashOffset, &dashIndex,
- x1, y1, x2, y2,
- projectLeft, projectRight, &leftFace, &rightFace);
- startIsFg = !(prevDashIndex & 1);
- endIsFg = (dashIndex & 1) ^ (dashOffset != 0);
- if (pGC->lineStyle == LineDoubleDash || startIsFg)
- {
- pixel = startIsFg ? pGC->fgPixel : pGC->bgPixel;
- if (first || (pGC->lineStyle == LineOnOffDash && !prevIsFg))
- {
- if (first && selfJoin)
- {
- firstFace = leftFace;
- firstIsFg = startIsFg;
- }
- else if (pGC->capStyle == CapRound)
- miLineArc (pDrawable, pGC, pixel, spanData,
- &leftFace, (LineFacePtr) NULL,
- (double)0.0, (double)0.0, TRUE);
- }
- else
- {
- miLineJoin (pDrawable, pGC, pixel, spanData, &leftFace,
- &prevRightFace);
- }
- }
- prevRightFace = rightFace;
- prevIsFg = endIsFg;
- first = FALSE;
- projectLeft = FALSE;
- }
- if (npt == 1 && somethingDrawn)
- {
- if (pGC->lineStyle == LineDoubleDash || endIsFg)
- {
- pixel = endIsFg ? pGC->fgPixel : pGC->bgPixel;
- if (selfJoin && (pGC->lineStyle == LineDoubleDash || firstIsFg))
- {
- miLineJoin (pDrawable, pGC, pixel, spanData, &firstFace,
- &rightFace);
- }
- else
- {
- if (pGC->capStyle == CapRound)
- miLineArc (pDrawable, pGC, pixel, spanData,
- (LineFacePtr) NULL, &rightFace,
- (double)0.0, (double)0.0, TRUE);
- }
- }
- else
- {
- /* glue a cap to the start of the line if
- * we're OnOffDash and ended on odd dash
- */
- if (selfJoin && firstIsFg)
- {
- pixel = pGC->fgPixel;
- if (pGC->capStyle == CapProjecting)
- miLineProjectingCap (pDrawable, pGC, pixel, spanData,
- &firstFace, TRUE,
- (double)0.0, (double)0.0, TRUE);
- else if (pGC->capStyle == CapRound)
- miLineArc (pDrawable, pGC, pixel, spanData,
- &firstFace, (LineFacePtr) NULL,
- (double)0.0, (double)0.0, TRUE);
- }
- }
- }
- }
- /* handle crock where all points are coincident */
- if (!somethingDrawn && (pGC->lineStyle == LineDoubleDash || !(dashIndex & 1)))
- {
- /* not the same as endIsFg computation above */
- pixel = (dashIndex & 1) ? pGC->bgPixel : pGC->fgPixel;
- switch (pGC->capStyle) {
- case CapRound:
- miLineArc (pDrawable, pGC, pixel, spanData,
- (LineFacePtr) NULL, (LineFacePtr) NULL,
- (double)x2, (double)y2,
- FALSE);
- break;
- case CapProjecting:
- x1 = pGC->lineWidth;
- miFillRectPolyHelper (pDrawable, pGC, pixel, spanData,
- x2 - (x1 >> 1), y2 - (x1 >> 1), x1, x1);
- break;
- }
- }
- if (spanData)
- miCleanupSpanData (pDrawable, pGC, spanData);
-}
-
-/* these are stubs to allow old ddx ValidateGCs to work without change */
-
-void
-miMiter()
-{
-}
-
-void
-miNotMiter()
-{
-}
projects / rdpsrv / blobdiff