127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/*
|
|
|
|
Copyright 1993, 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.
|
|
|
|
*/
|
|
|
|
|
|
/*
|
|
* transformed coordinate system objects for X
|
|
*/
|
|
|
|
#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;
|
|
}
|