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