void
ghid_draw_line (hidGC gc, int x1, int y1, int x2, int y2)
{
double dx1, dy1, dx2, dy2;
dx1 = Vx ((double) x1);
dy1 = Vy ((double) y1);
dx2 = Vx ((double) x2);
dy2 = Vy ((double) y2);
if (!ClipLine (0, 0, gport->width, gport->height,
&dx1, &dy1, &dx2, &dy2, gc->width / gport->zoom))
return;
USE_GC (gc);
gdk_draw_line (gport->drawable, gport->u_gc, dx1, dy1, dx2, dy2);
}
void
ghid_fill_circle (hidGC gc, int cx, int cy, int radius)
{
gint w, h, vr;
w = gport->width * gport->zoom;
h = gport->height * gport->zoom;
if (SIDE_X (cx) < gport->view_x0 - radius
|| SIDE_X (cx) > gport->view_x0 + w + radius
|| SIDE_Y (cy) < gport->view_y0 - radius
|| SIDE_Y (cy) > gport->view_y0 + h + radius)
return;
USE_GC (gc);
vr = Vz (radius);
gdk_draw_arc (gport->drawable, gport->u_gc, TRUE,
Vx (cx) - vr, Vy (cy) - vr, vr * 2, vr * 2, 0, 360 * 64);
}
void
ghid_draw_line (hidGC gc, Coord x1, Coord y1, Coord x2, Coord y2)
{
double dx1, dy1, dx2, dy2;
render_priv *priv = gport->render_priv;
dx1 = Vx ((double) x1);
dy1 = Vy ((double) y1);
dx2 = Vx ((double) x2);
dy2 = Vy ((double) y2);
if (!ClipLine (0, 0, gport->width, gport->height,
&dx1, &dy1, &dx2, &dy2, gc->width / gport->view.coord_per_px))
return;
USE_GC (gc);
gdk_draw_line (gport->drawable, priv->u_gc, dx1, dy1, dx2, dy2);
}
void
ghid_fill_circle (hidGC gc, Coord cx, Coord cy, Coord radius)
{
gint w, h, vr;
render_priv *priv = gport->render_priv;
w = gport->width * gport->view.coord_per_px;
h = gport->height * gport->view.coord_per_px;
if (SIDE_X (cx) < gport->view.x0 - radius
|| SIDE_X (cx) > gport->view.x0 + w + radius
|| SIDE_Y (cy) < gport->view.y0 - radius
|| SIDE_Y (cy) > gport->view.y0 + h + radius)
return;
USE_GC (gc);
vr = Vz (radius);
gdk_draw_arc (gport->drawable, priv->u_gc, TRUE,
Vx (cx) - vr, Vy (cy) - vr, vr * 2, vr * 2, 0, 360 * 64);
}
void
ghid_draw_rect (hidGC gc, Coord x1, Coord y1, Coord x2, Coord y2)
{
gint w, h, lw;
render_priv *priv = gport->render_priv;
lw = gc->width;
w = gport->width * gport->view.coord_per_px;
h = gport->height * gport->view.coord_per_px;
if ((SIDE_X (x1) < gport->view.x0 - lw
&& SIDE_X (x2) < gport->view.x0 - lw)
|| (SIDE_X (x1) > gport->view.x0 + w + lw
&& SIDE_X (x2) > gport->view.x0 + w + lw)
|| (SIDE_Y (y1) < gport->view.y0 - lw
&& SIDE_Y (y2) < gport->view.y0 - lw)
|| (SIDE_Y (y1) > gport->view.y0 + h + lw
&& SIDE_Y (y2) > gport->view.y0 + h + lw))
return;
x1 = Vx (x1);
y1 = Vy (y1);
x2 = Vx (x2);
y2 = Vy (y2);
if (x1 > x2)
{
gint xt = x1;
x1 = x2;
x2 = xt;
}
if (y1 > y2)
{
gint yt = y1;
y1 = y2;
y2 = yt;
}
USE_GC (gc);
gdk_draw_rectangle (gport->drawable, priv->u_gc, FALSE,
x1, y1, x2 - x1 + 1, y2 - y1 + 1);
}
void
ghid_fill_polygon (hidGC gc, int n_coords, int *x, int *y)
{
static GdkPoint *points = 0;
static int npoints = 0;
int i;
USE_GC (gc);
if (npoints < n_coords)
{
npoints = n_coords + 1;
points = (GdkPoint *)realloc (points, npoints * sizeof (GdkPoint));
}
for (i = 0; i < n_coords; i++)
{
points[i].x = Vx (x[i]);
points[i].y = Vy (y[i]);
}
gdk_draw_polygon (gport->drawable, gport->u_gc, 1, points, n_coords);
}
void
ghid_draw_rect (hidGC gc, int x1, int y1, int x2, int y2)
{
gint w, h, lw;
lw = gc->width;
w = gport->width * gport->zoom;
h = gport->height * gport->zoom;
if ((SIDE_X (x1) < gport->view_x0 - lw
&& SIDE_X (x2) < gport->view_x0 - lw)
|| (SIDE_X (x1) > gport->view_x0 + w + lw
&& SIDE_X (x2) > gport->view_x0 + w + lw)
|| (SIDE_Y (y1) < gport->view_y0 - lw
&& SIDE_Y (y2) < gport->view_y0 - lw)
|| (SIDE_Y (y1) > gport->view_y0 + h + lw
&& SIDE_Y (y2) > gport->view_y0 + h + lw))
return;
x1 = Vx (x1);
y1 = Vy (y1);
x2 = Vx (x2);
y2 = Vy (y2);
if (x1 > x2)
{
gint xt = x1;
x1 = x2;
x2 = xt;
}
if (y1 > y2)
{
gint yt = y1;
y1 = y2;
y2 = yt;
}
USE_GC (gc);
gdk_draw_rectangle (gport->drawable, gport->u_gc, FALSE,
x1, y1, x2 - x1 + 1, y2 - y1 + 1);
}
void
ghid_fill_rect (hidGC gc, int x1, int y1, int x2, int y2)
{
gint w, h, lw, xx, yy;
lw = gc->width;
w = gport->width * gport->zoom;
h = gport->height * gport->zoom;
if ((SIDE_X (x1) < gport->view_x0 - lw
&& SIDE_X (x2) < gport->view_x0 - lw)
|| (SIDE_X (x1) > gport->view_x0 + w + lw
&& SIDE_X (x2) > gport->view_x0 + w + lw)
|| (SIDE_Y (y1) < gport->view_y0 - lw
&& SIDE_Y (y2) < gport->view_y0 - lw)
|| (SIDE_Y (y1) > gport->view_y0 + h + lw
&& SIDE_Y (y2) > gport->view_y0 + h + lw))
return;
x1 = Vx (x1);
y1 = Vy (y1);
x2 = Vx (x2);
y2 = Vy (y2);
if (x2 < x1)
{
xx = x1;
x1 = x2;
x2 = xx;
}
if (y2 < y1)
{
yy = y1;
y1 = y2;
y2 = yy;
}
USE_GC (gc);
gdk_draw_rectangle (gport->drawable, gport->u_gc, TRUE,
x1, y1, x2 - x1 + 1, y2 - y1 + 1);
}
void
ghid_draw_arc (hidGC gc, Coord cx, Coord cy,
Coord xradius, Coord yradius, Angle start_angle, Angle delta_angle)
{
gint vrx, vry;
gint w, h, radius;
render_priv *priv = gport->render_priv;
w = gport->width * gport->view.coord_per_px;
h = gport->height * gport->view.coord_per_px;
radius = (xradius > yradius) ? xradius : yradius;
if (SIDE_X (cx) < gport->view.x0 - radius
|| SIDE_X (cx) > gport->view.x0 + w + radius
|| SIDE_Y (cy) < gport->view.y0 - radius
|| SIDE_Y (cy) > gport->view.y0 + h + radius)
return;
USE_GC (gc);
vrx = Vz (xradius);
vry = Vz (yradius);
if (gport->view.flip_x)
{
start_angle = 180 - start_angle;
delta_angle = -delta_angle;
}
if (gport->view.flip_y)
{
start_angle = -start_angle;
delta_angle = -delta_angle;
}
/* make sure we fall in the -180 to +180 range */
start_angle = NormalizeAngle (start_angle);
if (start_angle >= 180) start_angle -= 360;
gdk_draw_arc (gport->drawable, priv->u_gc, 0,
Vx (cx) - vrx, Vy (cy) - vry,
vrx * 2, vry * 2, (start_angle + 180) * 64, delta_angle * 64);
}
void
ghid_draw_arc (hidGC gc, int cx, int cy,
int xradius, int yradius, int start_angle, int delta_angle)
{
gint vrx, vry;
gint w, h, radius;
w = gport->width * gport->zoom;
h = gport->height * gport->zoom;
radius = (xradius > yradius) ? xradius : yradius;
if (SIDE_X (cx) < gport->view_x0 - radius
|| SIDE_X (cx) > gport->view_x0 + w + radius
|| SIDE_Y (cy) < gport->view_y0 - radius
|| SIDE_Y (cy) > gport->view_y0 + h + radius)
return;
USE_GC (gc);
vrx = Vz (xradius);
vry = Vz (yradius);
if (ghid_flip_x)
{
start_angle = 180 - start_angle;
delta_angle = -delta_angle;
}
if (ghid_flip_y)
{
start_angle = -start_angle;
delta_angle = -delta_angle;
}
/* make sure we fall in the -180 to +180 range */
start_angle = (start_angle + 360 + 180) % 360 - 180;
gdk_draw_arc (gport->drawable, gport->u_gc, 0,
Vx (cx) - vrx, Vy (cy) - vry,
vrx * 2, vry * 2, (start_angle + 180) * 64, delta_angle * 64);
}
