111 lines
2.1 KiB
C
111 lines
2.1 KiB
C
/*
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* transformed coordinate system objects for X
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*/
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# include <X11/Xos.h>
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# include <stdlib.h>
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# include <X11/Xlib.h>
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# include "transform.h"
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#if 0
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static XPoint *
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TranslatePoints (TPoint *points, int n_points, Transform *t, int mode)
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{
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XPoint *xpoints;
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int i;
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double xoff = 0.0, yoff = 0.0;
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xpoints = (XPoint *) malloc (n_points * sizeof (*xpoints));
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if (!xpoints)
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return NULL;
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for (i = 0; i < n_points; i++) {
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xpoints[i].x = Xx(points[i].x + xoff, points[i].y + yoff, t);
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xpoints[i].y = Xy(points[i].x + xoff, points[i].y + yoff, t);
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if (mode == CoordModePrevious) {
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xoff += points[i].x;
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yoff += points[i].y;
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}
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}
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return xpoints;
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}
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static void
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TFillPolygon (
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Display *dpy,
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Drawable d,
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GC gc,
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Transform *t,
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TPoint *points,
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int n_points,
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int shape,
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int mode)
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{
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XPoint *xpoints;
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xpoints = TranslatePoints (points, n_points, t, mode);
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if (xpoints) {
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XFillPolygon (dpy, d, gc, xpoints, n_points, shape,
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CoordModeOrigin);
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free (xpoints);
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}
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}
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static void
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TDrawArc (
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Display *dpy,
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Drawable d,
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GC gc,
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Transform *t,
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double x,
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double y,
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double width,
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double height,
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int angle1,
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int angle2)
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{
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int xx, xy, xw, xh;
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xx = Xx(x,y,t);
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xy = Xy(x,y,t);
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xw = Xwidth (width, height, t);
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xh = Xheight (width, height, t);
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if (xw < 0) {
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xx += xw;
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xw = -xw;
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}
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if (xh < 0) {
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xy += xh;
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xh = -xh;
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}
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XDrawArc (dpy, d, gc, xx, xy, xw, xh, angle1, angle2);
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}
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#endif
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void
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Trectangle(const Transform *t, const TRectangle *i, TRectangle *o)
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{
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o->x = t->mx * i->x + t->bx;
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o->y = t->my * i->y + t->by;
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o->width = t->mx * i->width;
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o->height = t->my * i->height;
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if (o->width < 0) {
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o->x += o->width;
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o->width = -o->width;
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}
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if (o->height < 0) {
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o->y += o->height;
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o->height = -o->height;
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}
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}
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void
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SetTransform (Transform *t,
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int xx1, int xx2, int xy1, int xy2,
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double tx1, double tx2, double ty1, double ty2)
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{
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t->mx = ((double) xx2 - xx1) / (tx2 - tx1);
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t->bx = ((double) xx1) - t->mx * tx1;
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t->my = ((double) xy2 - xy1) / (ty2 - ty1);
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t->by = ((double) xy1) - t->my * ty1;
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}
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