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Diffstat (limited to 'xorg-server/mi/mifillarc.c')
-rw-r--r--xorg-server/mi/mifillarc.c1510
1 files changed, 712 insertions, 798 deletions
diff --git a/xorg-server/mi/mifillarc.c b/xorg-server/mi/mifillarc.c
index dd0a7b91d..337343dd1 100644
--- a/xorg-server/mi/mifillarc.c
+++ b/xorg-server/mi/mifillarc.c
@@ -1,798 +1,712 @@
-/************************************************************
-
-Copyright 1989, 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: Bob Scheifler, MIT X Consortium
-
-********************************************************/
-
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <math.h>
-#include <X11/X.h>
-#include <X11/Xprotostr.h>
-#include "regionstr.h"
-#include "gcstruct.h"
-#include "pixmapstr.h"
-#include "mifpoly.h"
-#include "mi.h"
-#include "mifillarc.h"
-
-#define QUADRANT (90 * 64)
-#define HALFCIRCLE (180 * 64)
-#define QUADRANT3 (270 * 64)
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#define Dsin(d) sin((double)d*(M_PI/11520.0))
-#define Dcos(d) cos((double)d*(M_PI/11520.0))
-
-void
-miFillArcSetup(xArc *arc, miFillArcRec *info)
-{
- info->y = arc->height >> 1;
- info->dy = arc->height & 1;
- info->yorg = arc->y + info->y;
- info->dx = arc->width & 1;
- info->xorg = arc->x + (arc->width >> 1) + info->dx;
- info->dx = 1 - info->dx;
- if (arc->width == arc->height)
- {
- /* (2x - 2xorg)^2 = d^2 - (2y - 2yorg)^2 */
- /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
- info->ym = 8;
- info->xm = 8;
- info->yk = info->y << 3;
- if (!info->dx)
- {
- info->xk = 0;
- info->e = -1;
- }
- else
- {
- info->y++;
- info->yk += 4;
- info->xk = -4;
- info->e = - (info->y << 3);
- }
- }
- else
- {
- /* h^2 * (2x - 2xorg)^2 = w^2 * h^2 - w^2 * (2y - 2yorg)^2 */
- /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
- info->ym = (arc->width * arc->width) << 3;
- info->xm = (arc->height * arc->height) << 3;
- info->yk = info->y * info->ym;
- if (!info->dy)
- info->yk -= info->ym >> 1;
- if (!info->dx)
- {
- info->xk = 0;
- info->e = - (info->xm >> 3);
- }
- else
- {
- info->y++;
- info->yk += info->ym;
- info->xk = -(info->xm >> 1);
- info->e = info->xk - info->yk;
- }
- }
-}
-
-static void
-miFillArcDSetup(xArc *arc, miFillArcDRec *info)
-{
- /* h^2 * (2x - 2xorg)^2 = w^2 * h^2 - w^2 * (2y - 2yorg)^2 */
- /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
- info->y = arc->height >> 1;
- info->dy = arc->height & 1;
- info->yorg = arc->y + info->y;
- info->dx = arc->width & 1;
- info->xorg = arc->x + (arc->width >> 1) + info->dx;
- info->dx = 1 - info->dx;
- info->ym = ((double)arc->width) * (arc->width * 8);
- info->xm = ((double)arc->height) * (arc->height * 8);
- info->yk = info->y * info->ym;
- if (!info->dy)
- info->yk -= info->ym / 2.0;
- if (!info->dx)
- {
- info->xk = 0;
- info->e = - (info->xm / 8.0);
- }
- else
- {
- info->y++;
- info->yk += info->ym;
- info->xk = -info->xm / 2.0;
- info->e = info->xk - info->yk;
- }
-}
-
-static void
-miGetArcEdge(
- xArc *arc,
- miSliceEdgePtr edge,
- int k,
- Bool top,
- Bool left )
-{
- int xady, y;
-
- y = arc->height >> 1;
- if (!(arc->width & 1))
- y++;
- if (!top)
- {
- y = -y;
- if (arc->height & 1)
- y--;
- }
- xady = k + y * edge->dx;
- if (xady <= 0)
- edge->x = - ((-xady) / edge->dy + 1);
- else
- edge->x = (xady - 1) / edge->dy;
- edge->e = xady - edge->x * edge->dy;
- if ((top && (edge->dx < 0)) || (!top && (edge->dx > 0)))
- edge->e = edge->dy - edge->e + 1;
- if (left)
- edge->x++;
- edge->x += arc->x + (arc->width >> 1);
- if (edge->dx > 0)
- {
- edge->deltax = 1;
- edge->stepx = edge->dx / edge->dy;
- edge->dx = edge->dx % edge->dy;
- }
- else
- {
- edge->deltax = -1;
- edge->stepx = - ((-edge->dx) / edge->dy);
- edge->dx = (-edge->dx) % edge->dy;
- }
- if (!top)
- {
- edge->deltax = -edge->deltax;
- edge->stepx = -edge->stepx;
- }
-}
-
-static void
-miEllipseAngleToSlope (int angle, int width, int height, int *dxp, int *dyp,
- double *d_dxp, double *d_dyp)
-{
- int dx, dy;
- double d_dx, d_dy, scale;
- Bool negative_dx, negative_dy;
-
- switch (angle) {
- case 0:
- *dxp = -1;
- *dyp = 0;
- if (d_dxp) {
- *d_dxp = width / 2.0;
- *d_dyp = 0;
- }
- break;
- case QUADRANT:
- *dxp = 0;
- *dyp = 1;
- if (d_dxp) {
- *d_dxp = 0;
- *d_dyp = - height / 2.0;
- }
- break;
- case HALFCIRCLE:
- *dxp = 1;
- *dyp = 0;
- if (d_dxp) {
- *d_dxp = - width / 2.0;
- *d_dyp = 0;
- }
- break;
- case QUADRANT3:
- *dxp = 0;
- *dyp = -1;
- if (d_dxp) {
- *d_dxp = 0;
- *d_dyp = height / 2.0;
- }
- break;
- default:
- d_dx = Dcos(angle) * width;
- d_dy = Dsin(angle) * height;
- if (d_dxp) {
- *d_dxp = d_dx / 2.0;
- *d_dyp = - d_dy / 2.0;
- }
- negative_dx = FALSE;
- if (d_dx < 0.0)
- {
- d_dx = -d_dx;
- negative_dx = TRUE;
- }
- negative_dy = FALSE;
- if (d_dy < 0.0)
- {
- d_dy = -d_dy;
- negative_dy = TRUE;
- }
- scale = d_dx;
- if (d_dy > d_dx)
- scale = d_dy;
- dx = floor ((d_dx * 32768) / scale + 0.5);
- if (negative_dx)
- dx = -dx;
- *dxp = dx;
- dy = floor ((d_dy * 32768) / scale + 0.5);
- if (negative_dy)
- dy = -dy;
- *dyp = dy;
- break;
- }
-}
-
-static void
-miGetPieEdge(
- xArc *arc,
- int angle,
- miSliceEdgePtr edge,
- Bool top,
- Bool left )
-{
- int k;
- int dx, dy;
-
- miEllipseAngleToSlope (angle, arc->width, arc->height, &dx, &dy, 0, 0);
-
- if (dy == 0)
- {
- edge->x = left ? -65536 : 65536;
- edge->stepx = 0;
- edge->e = 0;
- edge->dx = -1;
- return;
- }
- if (dx == 0)
- {
- edge->x = arc->x + (arc->width >> 1);
- if (left && (arc->width & 1))
- edge->x++;
- else if (!left && !(arc->width & 1))
- edge->x--;
- edge->stepx = 0;
- edge->e = 0;
- edge->dx = -1;
- return;
- }
- if (dy < 0) {
- dx = -dx;
- dy = -dy;
- }
- k = (arc->height & 1) ? dx : 0;
- if (arc->width & 1)
- k += dy;
- edge->dx = dx << 1;
- edge->dy = dy << 1;
- miGetArcEdge(arc, edge, k, top, left);
-}
-
-void
-miFillArcSliceSetup(xArc *arc, miArcSliceRec *slice, GCPtr pGC)
-{
- int angle1, angle2;
-
- angle1 = arc->angle1;
- if (arc->angle2 < 0)
- {
- angle2 = angle1;
- angle1 += arc->angle2;
- }
- else
- angle2 = angle1 + arc->angle2;
- while (angle1 < 0)
- angle1 += FULLCIRCLE;
- while (angle1 >= FULLCIRCLE)
- angle1 -= FULLCIRCLE;
- while (angle2 < 0)
- angle2 += FULLCIRCLE;
- while (angle2 >= FULLCIRCLE)
- angle2 -= FULLCIRCLE;
- slice->min_top_y = 0;
- slice->max_top_y = arc->height >> 1;
- slice->min_bot_y = 1 - (arc->height & 1);
- slice->max_bot_y = slice->max_top_y - 1;
- slice->flip_top = FALSE;
- slice->flip_bot = FALSE;
- if (pGC->arcMode == ArcPieSlice)
- {
- slice->edge1_top = (angle1 < HALFCIRCLE);
- slice->edge2_top = (angle2 <= HALFCIRCLE);
- if ((angle2 == 0) || (angle1 == HALFCIRCLE))
- {
- if (angle2 ? slice->edge2_top : slice->edge1_top)
- slice->min_top_y = slice->min_bot_y;
- else
- slice->min_top_y = arc->height;
- slice->min_bot_y = 0;
- }
- else if ((angle1 == 0) || (angle2 == HALFCIRCLE))
- {
- slice->min_top_y = slice->min_bot_y;
- if (angle1 ? slice->edge1_top : slice->edge2_top)
- slice->min_bot_y = arc->height;
- else
- slice->min_bot_y = 0;
- }
- else if (slice->edge1_top == slice->edge2_top)
- {
- if (angle2 < angle1)
- {
- slice->flip_top = slice->edge1_top;
- slice->flip_bot = !slice->edge1_top;
- }
- else if (slice->edge1_top)
- {
- slice->min_top_y = 1;
- slice->min_bot_y = arc->height;
- }
- else
- {
- slice->min_bot_y = 0;
- slice->min_top_y = arc->height;
- }
- }
- miGetPieEdge(arc, angle1, &slice->edge1,
- slice->edge1_top, !slice->edge1_top);
- miGetPieEdge(arc, angle2, &slice->edge2,
- slice->edge2_top, slice->edge2_top);
- }
- else
- {
- double w2, h2, x1, y1, x2, y2, dx, dy, scale;
- int signdx, signdy, y, k;
- Bool isInt1 = TRUE, isInt2 = TRUE;
-
- w2 = (double)arc->width / 2.0;
- h2 = (double)arc->height / 2.0;
- if ((angle1 == 0) || (angle1 == HALFCIRCLE))
- {
- x1 = angle1 ? -w2 : w2;
- y1 = 0.0;
- }
- else if ((angle1 == QUADRANT) || (angle1 == QUADRANT3))
- {
- x1 = 0.0;
- y1 = (angle1 == QUADRANT) ? h2 : -h2;
- }
- else
- {
- isInt1 = FALSE;
- x1 = Dcos(angle1) * w2;
- y1 = Dsin(angle1) * h2;
- }
- if ((angle2 == 0) || (angle2 == HALFCIRCLE))
- {
- x2 = angle2 ? -w2 : w2;
- y2 = 0.0;
- }
- else if ((angle2 == QUADRANT) || (angle2 == QUADRANT3))
- {
- x2 = 0.0;
- y2 = (angle2 == QUADRANT) ? h2 : -h2;
- }
- else
- {
- isInt2 = FALSE;
- x2 = Dcos(angle2) * w2;
- y2 = Dsin(angle2) * h2;
- }
- dx = x2 - x1;
- dy = y2 - y1;
- if (arc->height & 1)
- {
- y1 -= 0.5;
- y2 -= 0.5;
- }
- if (arc->width & 1)
- {
- x1 += 0.5;
- x2 += 0.5;
- }
- if (dy < 0.0)
- {
- dy = -dy;
- signdy = -1;
- }
- else
- signdy = 1;
- if (dx < 0.0)
- {
- dx = -dx;
- signdx = -1;
- }
- else
- signdx = 1;
- if (isInt1 && isInt2)
- {
- slice->edge1.dx = dx * 2;
- slice->edge1.dy = dy * 2;
- }
- else
- {
- scale = (dx > dy) ? dx : dy;
- slice->edge1.dx = floor((dx * 32768) / scale + .5);
- slice->edge1.dy = floor((dy * 32768) / scale + .5);
- }
- if (!slice->edge1.dy)
- {
- if (signdx < 0)
- {
- y = floor(y1 + 1.0);
- if (y >= 0)
- {
- slice->min_top_y = y;
- slice->min_bot_y = arc->height;
- }
- else
- {
- slice->max_bot_y = -y - (arc->height & 1);
- }
- }
- else
- {
- y = floor(y1);
- if (y >= 0)
- slice->max_top_y = y;
- else
- {
- slice->min_top_y = arc->height;
- slice->min_bot_y = -y - (arc->height & 1);
- }
- }
- slice->edge1_top = TRUE;
- slice->edge1.x = 65536;
- slice->edge1.stepx = 0;
- slice->edge1.e = 0;
- slice->edge1.dx = -1;
- slice->edge2 = slice->edge1;
- slice->edge2_top = FALSE;
- }
- else if (!slice->edge1.dx)
- {
- if (signdy < 0)
- x1 -= 1.0;
- slice->edge1.x = ceil(x1);
- slice->edge1_top = signdy < 0;
- slice->edge1.x += arc->x + (arc->width >> 1);
- slice->edge1.stepx = 0;
- slice->edge1.e = 0;
- slice->edge1.dx = -1;
- slice->edge2_top = !slice->edge1_top;
- slice->edge2 = slice->edge1;
- }
- else
- {
- if (signdx < 0)
- slice->edge1.dx = -slice->edge1.dx;
- if (signdy < 0)
- slice->edge1.dx = -slice->edge1.dx;
- k = ceil(((x1 + x2) * slice->edge1.dy - (y1 + y2) * slice->edge1.dx) / 2.0);
- slice->edge2.dx = slice->edge1.dx;
- slice->edge2.dy = slice->edge1.dy;
- slice->edge1_top = signdy < 0;
- slice->edge2_top = !slice->edge1_top;
- miGetArcEdge(arc, &slice->edge1, k,
- slice->edge1_top, !slice->edge1_top);
- miGetArcEdge(arc, &slice->edge2, k,
- slice->edge2_top, slice->edge2_top);
- }
- }
-}
-
-#define ADDSPANS() \
- pts->x = xorg - x; \
- pts->y = yorg - y; \
- *wids = slw; \
- pts++; \
- wids++; \
- if (miFillArcLower(slw)) \
- { \
- pts->x = xorg - x; \
- pts->y = yorg + y + dy; \
- pts++; \
- *wids++ = slw; \
- }
-
-static void
-miFillEllipseI(
- DrawablePtr pDraw,
- GCPtr pGC,
- xArc *arc )
-{
- int x, y, e;
- int yk, xk, ym, xm, dx, dy, xorg, yorg;
- int slw;
- miFillArcRec info;
- DDXPointPtr points;
- DDXPointPtr pts;
- int *widths;
- int *wids;
-
- points = malloc(sizeof(DDXPointRec) * arc->height);
- if (!points)
- return;
- widths = malloc(sizeof(int) * arc->height);
- if (!widths)
- {
- free(points);
- return;
- }
- miFillArcSetup(arc, &info);
- MIFILLARCSETUP();
- if (pGC->miTranslate)
- {
- xorg += pDraw->x;
- yorg += pDraw->y;
- }
- pts = points;
- wids = widths;
- while (y > 0)
- {
- MIFILLARCSTEP(slw);
- ADDSPANS();
- }
- (*pGC->ops->FillSpans)(pDraw, pGC, pts - points, points, widths, FALSE);
- free(widths);
- free(points);
-}
-
-static void
-miFillEllipseD(
- DrawablePtr pDraw,
- GCPtr pGC,
- xArc *arc )
-{
- int x, y;
- int xorg, yorg, dx, dy, slw;
- double e, yk, xk, ym, xm;
- miFillArcDRec info;
- DDXPointPtr points;
- DDXPointPtr pts;
- int *widths;
- int *wids;
-
- points = malloc(sizeof(DDXPointRec) * arc->height);
- if (!points)
- return;
- widths = malloc(sizeof(int) * arc->height);
- if (!widths)
- {
- free(points);
- return;
- }
- miFillArcDSetup(arc, &info);
- MIFILLARCSETUP();
- if (pGC->miTranslate)
- {
- xorg += pDraw->x;
- yorg += pDraw->y;
- }
- pts = points;
- wids = widths;
- while (y > 0)
- {
- MIFILLARCSTEP(slw);
- ADDSPANS();
- }
- (*pGC->ops->FillSpans)(pDraw, pGC, pts - points, points, widths, FALSE);
- free(widths);
- free(points);
-}
-
-#define ADDSPAN(l,r) \
- if (r >= l) \
- { \
- pts->x = l; \
- pts->y = ya; \
- pts++; \
- *wids++ = r - l + 1; \
- }
-
-#define ADDSLICESPANS(flip) \
- if (!flip) \
- { \
- ADDSPAN(xl, xr); \
- } \
- else \
- { \
- xc = xorg - x; \
- ADDSPAN(xc, xr); \
- xc += slw - 1; \
- ADDSPAN(xl, xc); \
- }
-
-static void
-miFillArcSliceI(
- DrawablePtr pDraw,
- GCPtr pGC,
- xArc *arc )
-{
- int yk, xk, ym, xm, dx, dy, xorg, yorg, slw;
- int x, y, e;
- miFillArcRec info;
- miArcSliceRec slice;
- int ya, xl, xr, xc;
- DDXPointPtr points;
- DDXPointPtr pts;
- int *widths;
- int *wids;
-
- miFillArcSetup(arc, &info);
- miFillArcSliceSetup(arc, &slice, pGC);
- MIFILLARCSETUP();
- slw = arc->height;
- if (slice.flip_top || slice.flip_bot)
- slw += (arc->height >> 1) + 1;
- points = malloc(sizeof(DDXPointRec) * slw);
- if (!points)
- return;
- widths = malloc(sizeof(int) * slw);
- if (!widths)
- {
- free(points);
- return;
- }
- if (pGC->miTranslate)
- {
- xorg += pDraw->x;
- yorg += pDraw->y;
- slice.edge1.x += pDraw->x;
- slice.edge2.x += pDraw->x;
- }
- pts = points;
- wids = widths;
- while (y > 0)
- {
- MIFILLARCSTEP(slw);
- MIARCSLICESTEP(slice.edge1);
- MIARCSLICESTEP(slice.edge2);
- if (miFillSliceUpper(slice))
- {
- ya = yorg - y;
- MIARCSLICEUPPER(xl, xr, slice, slw);
- ADDSLICESPANS(slice.flip_top);
- }
- if (miFillSliceLower(slice))
- {
- ya = yorg + y + dy;
- MIARCSLICELOWER(xl, xr, slice, slw);
- ADDSLICESPANS(slice.flip_bot);
- }
- }
- (*pGC->ops->FillSpans)(pDraw, pGC, pts - points, points, widths, FALSE);
- free(widths);
- free(points);
-}
-
-static void
-miFillArcSliceD(
- DrawablePtr pDraw,
- GCPtr pGC,
- xArc *arc )
-{
- int x, y;
- int dx, dy, xorg, yorg, slw;
- double e, yk, xk, ym, xm;
- miFillArcDRec info;
- miArcSliceRec slice;
- int ya, xl, xr, xc;
- DDXPointPtr points;
- DDXPointPtr pts;
- int *widths;
- int *wids;
-
- miFillArcDSetup(arc, &info);
- miFillArcSliceSetup(arc, &slice, pGC);
- MIFILLARCSETUP();
- slw = arc->height;
- if (slice.flip_top || slice.flip_bot)
- slw += (arc->height >> 1) + 1;
- points = malloc(sizeof(DDXPointRec) * slw);
- if (!points)
- return;
- widths = malloc(sizeof(int) * slw);
- if (!widths)
- {
- free(points);
- return;
- }
- if (pGC->miTranslate)
- {
- xorg += pDraw->x;
- yorg += pDraw->y;
- slice.edge1.x += pDraw->x;
- slice.edge2.x += pDraw->x;
- }
- pts = points;
- wids = widths;
- while (y > 0)
- {
- MIFILLARCSTEP(slw);
- MIARCSLICESTEP(slice.edge1);
- MIARCSLICESTEP(slice.edge2);
- if (miFillSliceUpper(slice))
- {
- ya = yorg - y;
- MIARCSLICEUPPER(xl, xr, slice, slw);
- ADDSLICESPANS(slice.flip_top);
- }
- if (miFillSliceLower(slice))
- {
- ya = yorg + y + dy;
- MIARCSLICELOWER(xl, xr, slice, slw);
- ADDSLICESPANS(slice.flip_bot);
- }
- }
- (*pGC->ops->FillSpans)(pDraw, pGC, pts - points, points, widths, FALSE);
- free(widths);
- free(points);
-}
-
-/* MIPOLYFILLARC -- The public entry for the PolyFillArc request.
- * Since we don't have to worry about overlapping segments, we can just
- * fill each arc as it comes.
- */
-void
-miPolyFillArc(DrawablePtr pDraw, GCPtr pGC, int narcs, xArc *parcs)
-{
- int i;
- xArc *arc;
-
- for(i = narcs, arc = parcs; --i >= 0; arc++)
- {
- if (miFillArcEmpty(arc))
- continue;
- if ((arc->angle2 >= FULLCIRCLE) || (arc->angle2 <= -FULLCIRCLE))
- {
- if (miCanFillArc(arc))
- miFillEllipseI(pDraw, pGC, arc);
- else
- miFillEllipseD(pDraw, pGC, arc);
- }
- else
- {
- if (miCanFillArc(arc))
- miFillArcSliceI(pDraw, pGC, arc);
- else
- miFillArcSliceD(pDraw, pGC, arc);
- }
- }
-}
+/************************************************************
+
+Copyright 1989, 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: Bob Scheifler, MIT X Consortium
+
+********************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <math.h>
+#include <X11/X.h>
+#include <X11/Xprotostr.h>
+#include "regionstr.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "mifpoly.h"
+#include "mi.h"
+#include "mifillarc.h"
+
+#define QUADRANT (90 * 64)
+#define HALFCIRCLE (180 * 64)
+#define QUADRANT3 (270 * 64)
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+#define Dsin(d) sin((double)d*(M_PI/11520.0))
+#define Dcos(d) cos((double)d*(M_PI/11520.0))
+
+void
+miFillArcSetup(xArc * arc, miFillArcRec * info)
+{
+ info->y = arc->height >> 1;
+ info->dy = arc->height & 1;
+ info->yorg = arc->y + info->y;
+ info->dx = arc->width & 1;
+ info->xorg = arc->x + (arc->width >> 1) + info->dx;
+ info->dx = 1 - info->dx;
+ if (arc->width == arc->height) {
+ /* (2x - 2xorg)^2 = d^2 - (2y - 2yorg)^2 */
+ /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
+ info->ym = 8;
+ info->xm = 8;
+ info->yk = info->y << 3;
+ if (!info->dx) {
+ info->xk = 0;
+ info->e = -1;
+ }
+ else {
+ info->y++;
+ info->yk += 4;
+ info->xk = -4;
+ info->e = -(info->y << 3);
+ }
+ }
+ else {
+ /* h^2 * (2x - 2xorg)^2 = w^2 * h^2 - w^2 * (2y - 2yorg)^2 */
+ /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
+ info->ym = (arc->width * arc->width) << 3;
+ info->xm = (arc->height * arc->height) << 3;
+ info->yk = info->y * info->ym;
+ if (!info->dy)
+ info->yk -= info->ym >> 1;
+ if (!info->dx) {
+ info->xk = 0;
+ info->e = -(info->xm >> 3);
+ }
+ else {
+ info->y++;
+ info->yk += info->ym;
+ info->xk = -(info->xm >> 1);
+ info->e = info->xk - info->yk;
+ }
+ }
+}
+
+static void
+miFillArcDSetup(xArc * arc, miFillArcDRec * info)
+{
+ /* h^2 * (2x - 2xorg)^2 = w^2 * h^2 - w^2 * (2y - 2yorg)^2 */
+ /* even: xorg = yorg = 0 odd: xorg = .5, yorg = -.5 */
+ info->y = arc->height >> 1;
+ info->dy = arc->height & 1;
+ info->yorg = arc->y + info->y;
+ info->dx = arc->width & 1;
+ info->xorg = arc->x + (arc->width >> 1) + info->dx;
+ info->dx = 1 - info->dx;
+ info->ym = ((double) arc->width) * (arc->width * 8);
+ info->xm = ((double) arc->height) * (arc->height * 8);
+ info->yk = info->y * info->ym;
+ if (!info->dy)
+ info->yk -= info->ym / 2.0;
+ if (!info->dx) {
+ info->xk = 0;
+ info->e = -(info->xm / 8.0);
+ }
+ else {
+ info->y++;
+ info->yk += info->ym;
+ info->xk = -info->xm / 2.0;
+ info->e = info->xk - info->yk;
+ }
+}
+
+static void
+miGetArcEdge(xArc * arc, miSliceEdgePtr edge, int k, Bool top, Bool left)
+{
+ int xady, y;
+
+ y = arc->height >> 1;
+ if (!(arc->width & 1))
+ y++;
+ if (!top) {
+ y = -y;
+ if (arc->height & 1)
+ y--;
+ }
+ xady = k + y * edge->dx;
+ if (xady <= 0)
+ edge->x = -((-xady) / edge->dy + 1);
+ else
+ edge->x = (xady - 1) / edge->dy;
+ edge->e = xady - edge->x * edge->dy;
+ if ((top && (edge->dx < 0)) || (!top && (edge->dx > 0)))
+ edge->e = edge->dy - edge->e + 1;
+ if (left)
+ edge->x++;
+ edge->x += arc->x + (arc->width >> 1);
+ if (edge->dx > 0) {
+ edge->deltax = 1;
+ edge->stepx = edge->dx / edge->dy;
+ edge->dx = edge->dx % edge->dy;
+ }
+ else {
+ edge->deltax = -1;
+ edge->stepx = -((-edge->dx) / edge->dy);
+ edge->dx = (-edge->dx) % edge->dy;
+ }
+ if (!top) {
+ edge->deltax = -edge->deltax;
+ edge->stepx = -edge->stepx;
+ }
+}
+
+static void
+miEllipseAngleToSlope(int angle, int width, int height, int *dxp, int *dyp,
+ double *d_dxp, double *d_dyp)
+{
+ int dx, dy;
+ double d_dx, d_dy, scale;
+ Bool negative_dx, negative_dy;
+
+ switch (angle) {
+ case 0:
+ *dxp = -1;
+ *dyp = 0;
+ if (d_dxp) {
+ *d_dxp = width / 2.0;
+ *d_dyp = 0;
+ }
+ break;
+ case QUADRANT:
+ *dxp = 0;
+ *dyp = 1;
+ if (d_dxp) {
+ *d_dxp = 0;
+ *d_dyp = -height / 2.0;
+ }
+ break;
+ case HALFCIRCLE:
+ *dxp = 1;
+ *dyp = 0;
+ if (d_dxp) {
+ *d_dxp = -width / 2.0;
+ *d_dyp = 0;
+ }
+ break;
+ case QUADRANT3:
+ *dxp = 0;
+ *dyp = -1;
+ if (d_dxp) {
+ *d_dxp = 0;
+ *d_dyp = height / 2.0;
+ }
+ break;
+ default:
+ d_dx = Dcos(angle) * width;
+ d_dy = Dsin(angle) * height;
+ if (d_dxp) {
+ *d_dxp = d_dx / 2.0;
+ *d_dyp = -d_dy / 2.0;
+ }
+ negative_dx = FALSE;
+ if (d_dx < 0.0) {
+ d_dx = -d_dx;
+ negative_dx = TRUE;
+ }
+ negative_dy = FALSE;
+ if (d_dy < 0.0) {
+ d_dy = -d_dy;
+ negative_dy = TRUE;
+ }
+ scale = d_dx;
+ if (d_dy > d_dx)
+ scale = d_dy;
+ dx = floor((d_dx * 32768) / scale + 0.5);
+ if (negative_dx)
+ dx = -dx;
+ *dxp = dx;
+ dy = floor((d_dy * 32768) / scale + 0.5);
+ if (negative_dy)
+ dy = -dy;
+ *dyp = dy;
+ break;
+ }
+}
+
+static void
+miGetPieEdge(xArc * arc, int angle, miSliceEdgePtr edge, Bool top, Bool left)
+{
+ int k;
+ int dx, dy;
+
+ miEllipseAngleToSlope(angle, arc->width, arc->height, &dx, &dy, 0, 0);
+
+ if (dy == 0) {
+ edge->x = left ? -65536 : 65536;
+ edge->stepx = 0;
+ edge->e = 0;
+ edge->dx = -1;
+ return;
+ }
+ if (dx == 0) {
+ edge->x = arc->x + (arc->width >> 1);
+ if (left && (arc->width & 1))
+ edge->x++;
+ else if (!left && !(arc->width & 1))
+ edge->x--;
+ edge->stepx = 0;
+ edge->e = 0;
+ edge->dx = -1;
+ return;
+ }
+ if (dy < 0) {
+ dx = -dx;
+ dy = -dy;
+ }
+ k = (arc->height & 1) ? dx : 0;
+ if (arc->width & 1)
+ k += dy;
+ edge->dx = dx << 1;
+ edge->dy = dy << 1;
+ miGetArcEdge(arc, edge, k, top, left);
+}
+
+void
+miFillArcSliceSetup(xArc * arc, miArcSliceRec * slice, GCPtr pGC)
+{
+ int angle1, angle2;
+
+ angle1 = arc->angle1;
+ if (arc->angle2 < 0) {
+ angle2 = angle1;
+ angle1 += arc->angle2;
+ }
+ else
+ angle2 = angle1 + arc->angle2;
+ while (angle1 < 0)
+ angle1 += FULLCIRCLE;
+ while (angle1 >= FULLCIRCLE)
+ angle1 -= FULLCIRCLE;
+ while (angle2 < 0)
+ angle2 += FULLCIRCLE;
+ while (angle2 >= FULLCIRCLE)
+ angle2 -= FULLCIRCLE;
+ slice->min_top_y = 0;
+ slice->max_top_y = arc->height >> 1;
+ slice->min_bot_y = 1 - (arc->height & 1);
+ slice->max_bot_y = slice->max_top_y - 1;
+ slice->flip_top = FALSE;
+ slice->flip_bot = FALSE;
+ if (pGC->arcMode == ArcPieSlice) {
+ slice->edge1_top = (angle1 < HALFCIRCLE);
+ slice->edge2_top = (angle2 <= HALFCIRCLE);
+ if ((angle2 == 0) || (angle1 == HALFCIRCLE)) {
+ if (angle2 ? slice->edge2_top : slice->edge1_top)
+ slice->min_top_y = slice->min_bot_y;
+ else
+ slice->min_top_y = arc->height;
+ slice->min_bot_y = 0;
+ }
+ else if ((angle1 == 0) || (angle2 == HALFCIRCLE)) {
+ slice->min_top_y = slice->min_bot_y;
+ if (angle1 ? slice->edge1_top : slice->edge2_top)
+ slice->min_bot_y = arc->height;
+ else
+ slice->min_bot_y = 0;
+ }
+ else if (slice->edge1_top == slice->edge2_top) {
+ if (angle2 < angle1) {
+ slice->flip_top = slice->edge1_top;
+ slice->flip_bot = !slice->edge1_top;
+ }
+ else if (slice->edge1_top) {
+ slice->min_top_y = 1;
+ slice->min_bot_y = arc->height;
+ }
+ else {
+ slice->min_bot_y = 0;
+ slice->min_top_y = arc->height;
+ }
+ }
+ miGetPieEdge(arc, angle1, &slice->edge1,
+ slice->edge1_top, !slice->edge1_top);
+ miGetPieEdge(arc, angle2, &slice->edge2,
+ slice->edge2_top, slice->edge2_top);
+ }
+ else {
+ double w2, h2, x1, y1, x2, y2, dx, dy, scale;
+ int signdx, signdy, y, k;
+ Bool isInt1 = TRUE, isInt2 = TRUE;
+
+ w2 = (double) arc->width / 2.0;
+ h2 = (double) arc->height / 2.0;
+ if ((angle1 == 0) || (angle1 == HALFCIRCLE)) {
+ x1 = angle1 ? -w2 : w2;
+ y1 = 0.0;
+ }
+ else if ((angle1 == QUADRANT) || (angle1 == QUADRANT3)) {
+ x1 = 0.0;
+ y1 = (angle1 == QUADRANT) ? h2 : -h2;
+ }
+ else {
+ isInt1 = FALSE;
+ x1 = Dcos(angle1) * w2;
+ y1 = Dsin(angle1) * h2;
+ }
+ if ((angle2 == 0) || (angle2 == HALFCIRCLE)) {
+ x2 = angle2 ? -w2 : w2;
+ y2 = 0.0;
+ }
+ else if ((angle2 == QUADRANT) || (angle2 == QUADRANT3)) {
+ x2 = 0.0;
+ y2 = (angle2 == QUADRANT) ? h2 : -h2;
+ }
+ else {
+ isInt2 = FALSE;
+ x2 = Dcos(angle2) * w2;
+ y2 = Dsin(angle2) * h2;
+ }
+ dx = x2 - x1;
+ dy = y2 - y1;
+ if (arc->height & 1) {
+ y1 -= 0.5;
+ y2 -= 0.5;
+ }
+ if (arc->width & 1) {
+ x1 += 0.5;
+ x2 += 0.5;
+ }
+ if (dy < 0.0) {
+ dy = -dy;
+ signdy = -1;
+ }
+ else
+ signdy = 1;
+ if (dx < 0.0) {
+ dx = -dx;
+ signdx = -1;
+ }
+ else
+ signdx = 1;
+ if (isInt1 && isInt2) {
+ slice->edge1.dx = dx * 2;
+ slice->edge1.dy = dy * 2;
+ }
+ else {
+ scale = (dx > dy) ? dx : dy;
+ slice->edge1.dx = floor((dx * 32768) / scale + .5);
+ slice->edge1.dy = floor((dy * 32768) / scale + .5);
+ }
+ if (!slice->edge1.dy) {
+ if (signdx < 0) {
+ y = floor(y1 + 1.0);
+ if (y >= 0) {
+ slice->min_top_y = y;
+ slice->min_bot_y = arc->height;
+ }
+ else {
+ slice->max_bot_y = -y - (arc->height & 1);
+ }
+ }
+ else {
+ y = floor(y1);
+ if (y >= 0)
+ slice->max_top_y = y;
+ else {
+ slice->min_top_y = arc->height;
+ slice->min_bot_y = -y - (arc->height & 1);
+ }
+ }
+ slice->edge1_top = TRUE;
+ slice->edge1.x = 65536;
+ slice->edge1.stepx = 0;
+ slice->edge1.e = 0;
+ slice->edge1.dx = -1;
+ slice->edge2 = slice->edge1;
+ slice->edge2_top = FALSE;
+ }
+ else if (!slice->edge1.dx) {
+ if (signdy < 0)
+ x1 -= 1.0;
+ slice->edge1.x = ceil(x1);
+ slice->edge1_top = signdy < 0;
+ slice->edge1.x += arc->x + (arc->width >> 1);
+ slice->edge1.stepx = 0;
+ slice->edge1.e = 0;
+ slice->edge1.dx = -1;
+ slice->edge2_top = !slice->edge1_top;
+ slice->edge2 = slice->edge1;
+ }
+ else {
+ if (signdx < 0)
+ slice->edge1.dx = -slice->edge1.dx;
+ if (signdy < 0)
+ slice->edge1.dx = -slice->edge1.dx;
+ k = ceil(((x1 + x2) * slice->edge1.dy -
+ (y1 + y2) * slice->edge1.dx) / 2.0);
+ slice->edge2.dx = slice->edge1.dx;
+ slice->edge2.dy = slice->edge1.dy;
+ slice->edge1_top = signdy < 0;
+ slice->edge2_top = !slice->edge1_top;
+ miGetArcEdge(arc, &slice->edge1, k,
+ slice->edge1_top, !slice->edge1_top);
+ miGetArcEdge(arc, &slice->edge2, k,
+ slice->edge2_top, slice->edge2_top);
+ }
+ }
+}
+
+#define ADDSPANS() \
+ pts->x = xorg - x; \
+ pts->y = yorg - y; \
+ *wids = slw; \
+ pts++; \
+ wids++; \
+ if (miFillArcLower(slw)) \
+ { \
+ pts->x = xorg - x; \
+ pts->y = yorg + y + dy; \
+ pts++; \
+ *wids++ = slw; \
+ }
+
+static void
+miFillEllipseI(DrawablePtr pDraw, GCPtr pGC, xArc * arc)
+{
+ int x, y, e;
+ int yk, xk, ym, xm, dx, dy, xorg, yorg;
+ int slw;
+ miFillArcRec info;
+ DDXPointPtr points;
+ DDXPointPtr pts;
+ int *widths;
+ int *wids;
+
+ points = malloc(sizeof(DDXPointRec) * arc->height);
+ if (!points)
+ return;
+ widths = malloc(sizeof(int) * arc->height);
+ if (!widths) {
+ free(points);
+ return;
+ }
+ miFillArcSetup(arc, &info);
+ MIFILLARCSETUP();
+ if (pGC->miTranslate) {
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ }
+ pts = points;
+ wids = widths;
+ while (y > 0) {
+ MIFILLARCSTEP(slw);
+ ADDSPANS();
+ }
+ (*pGC->ops->FillSpans) (pDraw, pGC, pts - points, points, widths, FALSE);
+ free(widths);
+ free(points);
+}
+
+static void
+miFillEllipseD(DrawablePtr pDraw, GCPtr pGC, xArc * arc)
+{
+ int x, y;
+ int xorg, yorg, dx, dy, slw;
+ double e, yk, xk, ym, xm;
+ miFillArcDRec info;
+ DDXPointPtr points;
+ DDXPointPtr pts;
+ int *widths;
+ int *wids;
+
+ points = malloc(sizeof(DDXPointRec) * arc->height);
+ if (!points)
+ return;
+ widths = malloc(sizeof(int) * arc->height);
+ if (!widths) {
+ free(points);
+ return;
+ }
+ miFillArcDSetup(arc, &info);
+ MIFILLARCSETUP();
+ if (pGC->miTranslate) {
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ }
+ pts = points;
+ wids = widths;
+ while (y > 0) {
+ MIFILLARCSTEP(slw);
+ ADDSPANS();
+ }
+ (*pGC->ops->FillSpans) (pDraw, pGC, pts - points, points, widths, FALSE);
+ free(widths);
+ free(points);
+}
+
+#define ADDSPAN(l,r) \
+ if (r >= l) \
+ { \
+ pts->x = l; \
+ pts->y = ya; \
+ pts++; \
+ *wids++ = r - l + 1; \
+ }
+
+#define ADDSLICESPANS(flip) \
+ if (!flip) \
+ { \
+ ADDSPAN(xl, xr); \
+ } \
+ else \
+ { \
+ xc = xorg - x; \
+ ADDSPAN(xc, xr); \
+ xc += slw - 1; \
+ ADDSPAN(xl, xc); \
+ }
+
+static void
+miFillArcSliceI(DrawablePtr pDraw, GCPtr pGC, xArc * arc)
+{
+ int yk, xk, ym, xm, dx, dy, xorg, yorg, slw;
+ int x, y, e;
+ miFillArcRec info;
+ miArcSliceRec slice;
+ int ya, xl, xr, xc;
+ DDXPointPtr points;
+ DDXPointPtr pts;
+ int *widths;
+ int *wids;
+
+ miFillArcSetup(arc, &info);
+ miFillArcSliceSetup(arc, &slice, pGC);
+ MIFILLARCSETUP();
+ slw = arc->height;
+ if (slice.flip_top || slice.flip_bot)
+ slw += (arc->height >> 1) + 1;
+ points = malloc(sizeof(DDXPointRec) * slw);
+ if (!points)
+ return;
+ widths = malloc(sizeof(int) * slw);
+ if (!widths) {
+ free(points);
+ return;
+ }
+ if (pGC->miTranslate) {
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ slice.edge1.x += pDraw->x;
+ slice.edge2.x += pDraw->x;
+ }
+ pts = points;
+ wids = widths;
+ while (y > 0) {
+ MIFILLARCSTEP(slw);
+ MIARCSLICESTEP(slice.edge1);
+ MIARCSLICESTEP(slice.edge2);
+ if (miFillSliceUpper(slice)) {
+ ya = yorg - y;
+ MIARCSLICEUPPER(xl, xr, slice, slw);
+ ADDSLICESPANS(slice.flip_top);
+ }
+ if (miFillSliceLower(slice)) {
+ ya = yorg + y + dy;
+ MIARCSLICELOWER(xl, xr, slice, slw);
+ ADDSLICESPANS(slice.flip_bot);
+ }
+ }
+ (*pGC->ops->FillSpans) (pDraw, pGC, pts - points, points, widths, FALSE);
+ free(widths);
+ free(points);
+}
+
+static void
+miFillArcSliceD(DrawablePtr pDraw, GCPtr pGC, xArc * arc)
+{
+ int x, y;
+ int dx, dy, xorg, yorg, slw;
+ double e, yk, xk, ym, xm;
+ miFillArcDRec info;
+ miArcSliceRec slice;
+ int ya, xl, xr, xc;
+ DDXPointPtr points;
+ DDXPointPtr pts;
+ int *widths;
+ int *wids;
+
+ miFillArcDSetup(arc, &info);
+ miFillArcSliceSetup(arc, &slice, pGC);
+ MIFILLARCSETUP();
+ slw = arc->height;
+ if (slice.flip_top || slice.flip_bot)
+ slw += (arc->height >> 1) + 1;
+ points = malloc(sizeof(DDXPointRec) * slw);
+ if (!points)
+ return;
+ widths = malloc(sizeof(int) * slw);
+ if (!widths) {
+ free(points);
+ return;
+ }
+ if (pGC->miTranslate) {
+ xorg += pDraw->x;
+ yorg += pDraw->y;
+ slice.edge1.x += pDraw->x;
+ slice.edge2.x += pDraw->x;
+ }
+ pts = points;
+ wids = widths;
+ while (y > 0) {
+ MIFILLARCSTEP(slw);
+ MIARCSLICESTEP(slice.edge1);
+ MIARCSLICESTEP(slice.edge2);
+ if (miFillSliceUpper(slice)) {
+ ya = yorg - y;
+ MIARCSLICEUPPER(xl, xr, slice, slw);
+ ADDSLICESPANS(slice.flip_top);
+ }
+ if (miFillSliceLower(slice)) {
+ ya = yorg + y + dy;
+ MIARCSLICELOWER(xl, xr, slice, slw);
+ ADDSLICESPANS(slice.flip_bot);
+ }
+ }
+ (*pGC->ops->FillSpans) (pDraw, pGC, pts - points, points, widths, FALSE);
+ free(widths);
+ free(points);
+}
+
+/* MIPOLYFILLARC -- The public entry for the PolyFillArc request.
+ * Since we don't have to worry about overlapping segments, we can just
+ * fill each arc as it comes.
+ */
+void
+miPolyFillArc(DrawablePtr pDraw, GCPtr pGC, int narcs, xArc * parcs)
+{
+ int i;
+ xArc *arc;
+
+ for (i = narcs, arc = parcs; --i >= 0; arc++) {
+ if (miFillArcEmpty(arc))
+ continue;
+ if ((arc->angle2 >= FULLCIRCLE) || (arc->angle2 <= -FULLCIRCLE)) {
+ if (miCanFillArc(arc))
+ miFillEllipseI(pDraw, pGC, arc);
+ else
+ miFillEllipseD(pDraw, pGC, arc);
+ }
+ else {
+ if (miCanFillArc(arc))
+ miFillArcSliceI(pDraw, pGC, arc);
+ else
+ miFillArcSliceD(pDraw, pGC, arc);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 05:30:03 +0000