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-rw-r--r--hw/xfree86/xaa/xaaWideLine.c941
1 files changed, 941 insertions, 0 deletions
diff --git a/hw/xfree86/xaa/xaaWideLine.c b/hw/xfree86/xaa/xaaWideLine.c
new file mode 100644
index 000000000..7425f9d20
--- /dev/null
+++ b/hw/xfree86/xaa/xaaWideLine.c
@@ -0,0 +1,941 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaWideLine.c,v 1.10 2001/11/16 16:47:56 dawes Exp $ */
+
+/*
+
+XAAPolylinesWideSolid does not maintain a span list and subsequently does
+not follow the "touch-each-pixel-once" rules for wide lines and arcs.
+This means it can only be used in the case where we have
+miSpansEasyRop(pGC->alu). Since we clip spans on the fly, we
+limited usage of this function to one rect situations. This
+function is used only for solid lines.
+
+ Adapted from miWideLine by Mark Vojkovich (mvojkovi@ucsd.edu)
+Original mi code written by Keith Packard.
+
+*/
+
+#ifndef XFree86LOADER
+#if defined(_XOPEN_SOURCE) || defined(__QNXNTO__)
+#include <math.h>
+#else
+#define _XOPEN_SOURCE /* to get prototype for hypot on some systems */
+#include <math.h>
+#undef _XOPEN_SOURCE
+#endif
+#endif
+
+#include "misc.h"
+#include "xf86.h"
+#include "xf86_ansic.h"
+#include "xf86_OSproc.h"
+
+#include "X.h"
+#include "windowstr.h"
+#include "gcstruct.h"
+#include "miscstruct.h"
+#include "miwideline.h"
+#include "mi.h"
+#include "xf86str.h"
+#include "xaa.h"
+#include "xaalocal.h"
+
+#ifdef ICEILTEMPDECL
+ICEILTEMPDECL
+#endif
+
+#define DRAW_POINT(pScrn, x, y) \
+ if(hardClip) (*infoRec->SubsequentSolidFillRect)(pScrn, x, y, 1, 1); \
+ else XAAPointHelper(pScrn, x, y)
+
+#define FILL_RECT(pScrn, x, y, w, h) \
+ if(hardClip) (*infoRec->SubsequentSolidFillRect)(pScrn, x, y, w, h); \
+ else XAAFillRectHelper(pScrn, x, y, w, h)
+
+#define FILL_SPAN(pScrn, x, y, w) \
+ if(hardClip) (*infoRec->SubsequentSolidFillRect)(pScrn, x, y, w, 1); \
+ else XAASpanHelper(pScrn, x, y, w)
+
+
+#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 void
+XAAPointHelper(ScrnInfoPtr pScrn, int x, int y)
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
+ BoxPtr extents = infoRec->ClipBox;
+
+ if((x >= extents->x1) && (x < extents->x2) &&
+ (y >= extents->y1) && (y < extents->y2))
+ (*infoRec->SubsequentSolidFillRect)(pScrn, x, y, 1, 1);
+}
+
+static void
+XAAFillRectHelper(ScrnInfoPtr pScrn, int x1, int y1, int dx, int dy)
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
+ BoxPtr extents = infoRec->ClipBox;
+ int x2 = x1 + dx;
+ int y2 = y1 + dy;
+
+ if(x1 < extents->x1) x1 = extents->x1;
+ if(x2 >= extents->x2) x2 = extents->x2;
+ if((dx = x2 - x1)<1) return;
+ if(y1 < extents->y1) y1 = extents->y1;
+ if(y2 >= extents->y2) y2 = extents->y2;
+ if((dy = y2 - y1)<1) return;
+
+ (*infoRec->SubsequentSolidFillRect)(pScrn, x1, y1, dx, dy);
+}
+
+
+static void
+XAASpanHelper(ScrnInfoPtr pScrn, int x1, int y, int width)
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
+ BoxPtr extents = infoRec->ClipBox;
+ int x2;
+
+ if((y < extents->y1) || (y >= extents->y2)) return;
+
+ x2 = x1 + width;
+ if(x1 < extents->x1) x1 = extents->x1;
+ if(x2 > extents->x2) x2 = extents->x2;
+ width = x2 - x1;
+
+ if(width > 0)
+ (*infoRec->SubsequentSolidFillRect)(pScrn, x1, y, width, 1);
+
+}
+
+#define FixError(x, dx, dy, e, sign, step, h) { \
+ e += (h) * dx; \
+ x += (h) * step; \
+ if(e > 0) { \
+ x += e * sign/dy; \
+ e %= dy; \
+ if(e) { \
+ x += sign; \
+ e -= dy; \
+ } \
+ } \
+}
+
+
+static void
+XAAFillPolyHelper (
+ GCPtr pGC,
+ int y, /* start y coordinate */
+ int overall_height, /* height of entire segment */
+ PolyEdgePtr left, PolyEdgePtr right,
+ int left_count, int right_count )
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ BoxPtr extents = infoRec->ClipBox;
+ int left_x, left_e, left_stepx, left_signdx, left_dy, left_dx;
+ int right_x, right_e, right_stepx, right_signdx, right_dy, right_dx;
+ int height, left_height, right_height;
+ int xorg;
+ Bool hardClip;
+
+ if((y >= extents->y2) || ((y + overall_height) <= extents->y1))
+ return;
+
+ /* Muffle compiler */
+ left_x = left_e = left_stepx = left_signdx = left_dy = left_dx = 0;
+ right_x = right_e = right_stepx = right_signdx = right_dy = right_dx = 0;
+
+ left_height = right_height = 0;
+ xorg = 0;
+
+ hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+
+ while ((left_count || left_height) && (right_count || right_height)) {
+ if (!left_height && left_count) {
+ left_height = left->height;
+ left_x = left->x + xorg;
+ left_stepx = left->stepx;
+ left_signdx = left->signdx;
+ left_e = left->e;
+ left_dy = left->dy;
+ left_dx = left->dx;
+ left_count--;
+ left++;
+ }
+ if (!right_height && right_count) {
+ right_height = right->height;
+ right_x = right->x + xorg + 1;
+ right_stepx = right->stepx;
+ right_signdx = right->signdx;
+ right_e = right->e;
+ right_dy = right->dy;
+ right_dx = right->dx;
+ right_count--;
+ right++;
+ }
+
+ height = (left_height > right_height) ? right_height : left_height;
+
+ left_height -= height;
+ right_height -= height;
+
+ if(hardClip && infoRec->SubsequentSolidFillTrap && (height > 6)) {
+ int right_DX, left_DX;
+
+ right_DX = (right_dx * right_signdx) + (right_stepx * right_dy);
+ left_DX = (left_dx * left_signdx) + (left_stepx * left_dy);
+
+ (*infoRec->SubsequentSolidFillTrap)(infoRec->pScrn, y, height,
+ left_x, left_DX, left_dy, left_e,
+ right_x - 1, right_DX, right_dy, right_e);
+
+ FixError(left_x, left_dx, left_dy, left_e, left_signdx,
+ left_stepx, height);
+ FixError(right_x, right_dx, right_dy, right_e, right_signdx,
+ right_stepx, height);
+ y += height;
+ continue;
+ }
+
+ while (height--) {
+ if(right_x > left_x) {
+ FILL_SPAN(infoRec->pScrn, left_x, y, right_x - left_x);
+ }
+ y++;
+
+ left_x += left_stepx;
+ left_e += left_dx;
+ if (left_e > 0) {
+ left_x += left_signdx;
+ left_e -= left_dy;
+ }
+ right_x += right_stepx;
+ right_e += right_dx;
+ if (right_e > 0) {
+ right_x += right_signdx;
+ right_e -= right_dy;
+ }
+
+ }
+ }
+}
+
+
+
+static void
+XAAWideSegment (
+ GCPtr pGC,
+ int x1, int y1, int x2, int y2,
+ Bool projectLeft, Bool projectRight,
+ LineFacePtr leftFace, LineFacePtr rightFace )
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ 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;
+ Bool hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+
+ /* 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) {
+ 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;
+ FILL_RECT(infoRec->pScrn, x, y, dx, dy);
+ } else if (!dx) {
+ 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;
+ FILL_RECT(infoRec->pScrn, x, y, dx, dy);
+ } else {
+ l = ((double) lw) / 2.0;
+ L = sqrt((double)(dx*dx + dy*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;
+
+ 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;
+ XAAFillPolyHelper (pGC, topy,
+ bottom->height + bottomy - topy, lefts, rights, 2, 2);
+ }
+}
+
+
+static void
+XAALineArcI (GCPtr pGC, int xorg, int yorg)
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ int x, y, e, ex;
+ int slw = pGC->lineWidth;
+ Bool hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+
+ 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--;
+
+ FILL_SPAN(infoRec->pScrn, xorg - x, yorg - y, slw);
+
+ if ((y != 0) && ((slw > 1) || (e != ex))) {
+ FILL_SPAN(infoRec->pScrn, xorg - x, yorg + y, slw);
+ }
+ }
+}
+
+
+static void
+XAALineArcD (
+ GCPtr pGC,
+ double xorg,
+ double yorg,
+ PolyEdgePtr edge1,
+ int edgey1,
+ Bool edgeleft1,
+ PolyEdgePtr edge2,
+ int edgey2,
+ Bool edgeleft2 )
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ 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;
+ Bool hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+
+
+ xbase = floor(xorg);
+ x0 = xorg - xbase;
+ ybase = ICEIL (yorg);
+ y0 = yorg - ybase;
+
+ 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) {
+ FILL_SPAN(infoRec->pScrn, xcl, ybase, 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) {
+ FILL_SPAN(infoRec->pScrn, xcl, ybase, xcr - xcl + 1);
+ }
+ }
+}
+
+
+static void
+XAALineArc (
+ GCPtr pGC,
+ LineFacePtr leftFace,
+ LineFacePtr rightFace,
+ double xorg,
+ double yorg,
+ Bool isInt )
+{
+ int xorgi, yorgi;
+ PolyEdgeRec edge1, edge2;
+ int edgey1, edgey2;
+ Bool edgeleft1, edgeleft2;
+
+ if (isInt) {
+ xorgi = leftFace ? leftFace->x : rightFace->x;
+ yorgi = leftFace ? leftFace->y : rightFace->y;
+ } else { /* Muffle compiler */
+ xorgi = yorgi = 0;
+ }
+ 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->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 (isInt) {
+ if(pGC->lineWidth == 1) {
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ Bool hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+ DRAW_POINT(infoRec->pScrn, xorgi, yorgi);
+ } else
+ XAALineArcI(pGC, xorgi, yorgi);
+ } else
+ XAALineArcD(pGC, xorg, yorg, &edge1, edgey1, edgeleft1,
+ &edge2, edgey2, edgeleft2);
+
+}
+
+
+static void
+XAALineJoin (
+ GCPtr pGC,
+ LineFacePtr pLeft,
+ LineFacePtr pRight )
+{
+ double mx = 0, my = 0;
+ double denom = 0;
+ 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) {
+ /* 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 == 0.0)
+ return; /* no join to draw */
+ }
+ if (joinStyle != JoinMiter) {
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ Bool hardClip = (infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL);
+ DRAW_POINT(infoRec->pScrn, pLeft->x, pLeft->y);
+ return;
+ }
+ } else {
+ if (joinStyle == JoinRound) {
+ XAALineArc(pGC, 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);
+ XAAFillPolyHelper(pGC, y, height, left, right, nleft, nright);
+}
+
+
+void
+XAAPolylinesWideSolid (
+ DrawablePtr pDrawable,
+ GCPtr pGC,
+ int mode,
+ int npt,
+ DDXPointPtr pPts )
+{
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ int x1, y1, x2, y2;
+ Bool projectLeft, projectRight;
+ LineFaceRec leftFace, rightFace, prevRightFace, firstFace;
+ int first = TRUE;
+ Bool somethingDrawn = FALSE;
+ Bool selfJoin = FALSE;
+ int xorg = pDrawable->x;
+ int yorg = pDrawable->y;
+ Bool hardClip = FALSE;
+
+ if(!REGION_NUM_RECTS(pGC->pCompositeClip))
+ return;
+
+ if(REGION_NUM_RECTS(pGC->pCompositeClip) != 1) {
+ miWideLine(pDrawable, pGC, mode, npt, pPts);
+ return;
+ }
+
+ if (mode == CoordModePrevious) {
+ pPts->x += xorg;
+ pPts->y += yorg;
+ } else if(xorg | yorg) {
+ register int n = npt;
+ register DDXPointPtr pts = pPts;
+
+ while(n--) {
+ pts->x += xorg;
+ pts->y += yorg;
+ pts++;
+ }
+ }
+
+ x2 = pPts->x;
+ y2 = pPts->y;
+ if (npt > 1) {
+ if (mode == CoordModePrevious) {
+ int nptTmp;
+ register 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;
+
+ (*infoRec->SetupForSolidFill)(infoRec->pScrn, pGC->fgPixel, pGC->alu,
+ pGC->planemask);
+
+ infoRec->ClipBox = &pGC->pCompositeClip->extents;
+
+ if(infoRec->ClippingFlags & HARDWARE_CLIP_SOLID_FILL) {
+ hardClip = TRUE;
+ (*infoRec->SetClippingRectangle)(infoRec->pScrn,
+ infoRec->ClipBox->x1, infoRec->ClipBox->y1,
+ infoRec->ClipBox->x2 - 1, infoRec->ClipBox->y2 - 1);
+ }
+
+ 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;
+ XAAWideSegment(pGC, x1, y1, x2, y2,
+ projectLeft, projectRight, &leftFace, &rightFace);
+ if (first) {
+ if (selfJoin)
+ firstFace = leftFace;
+ else if (pGC->capStyle == CapRound) {
+ if (pGC->lineWidth == 1) {
+ DRAW_POINT(infoRec->pScrn, x1, y1);
+ } else
+ XAALineArc(pGC,&leftFace, (LineFacePtr) NULL,
+ (double)0.0, (double)0.0,TRUE);
+ }
+ } else
+ XAALineJoin (pGC, &leftFace, &prevRightFace);
+
+ prevRightFace = rightFace;
+ first = FALSE;
+ projectLeft = FALSE;
+ }
+ if (npt == 1 && somethingDrawn) {
+ if (selfJoin)
+ XAALineJoin (pGC, &firstFace, &rightFace);
+ else if (pGC->capStyle == CapRound) {
+ if (pGC->lineWidth == 1) {
+ DRAW_POINT(infoRec->pScrn, x2, y2);
+ } else
+ XAALineArc (pGC, (LineFacePtr) NULL, &rightFace,
+ (double)0.0, (double)0.0,TRUE);
+ }
+ }
+ }
+ /* handle crock where all points are coincedent */
+ if (!somethingDrawn) {
+ projectLeft = (pGC->capStyle == CapProjecting);
+ XAAWideSegment (pGC, x2, y2, x2, y2, projectLeft, projectLeft,
+ &leftFace, &rightFace);
+ if (pGC->capStyle == CapRound) {
+ XAALineArc (pGC, &leftFace, (LineFacePtr) NULL,
+ (double)0.0, (double)0.0, TRUE);
+ rightFace.dx = -1; /* sleezy hack to make it work */
+ XAALineArc (pGC, (LineFacePtr) NULL, &rightFace,
+ (double)0.0, (double)0.0, TRUE);
+ }
+ }
+
+ infoRec->ClipBox = NULL;
+ if(hardClip)
+ (*infoRec->DisableClipping)(infoRec->pScrn);
+
+ SET_SYNC_FLAG(infoRec);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 02:58:48 +0000