1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* The internal point-drawing function, which point() is a wrapper around.
It draws a point at the current location. There is no standard
definition of `point', so any Plotter is free to implement this as it
sees fit. */
#include "sys-defines.h"
#include "extern.h"
#include "xmi.h"
void
#ifdef _HAVE_PROTOS
_i_paint_point (S___(Plotter *_plotter))
#else
_i_paint_point (S___(_plotter))
S___(Plotter *_plotter;)
#endif
{
double xx, yy;
int ixx, iyy;
miGC *pGC;
miPixel fgPixel, bgPixel, pixels[2];
miPoint point, offset;
if (_plotter->drawstate->pen_type != 0)
/* have a pen to draw with */
{
/* convert point to floating-point device coordinates */
xx = XD(_plotter->drawstate->pos.x, _plotter->drawstate->pos.y);
yy = YD(_plotter->drawstate->pos.x, _plotter->drawstate->pos.y);
/* round to integer device (GIF) coordinates */
ixx = IROUND(xx);
iyy = IROUND(yy);
/* compute background and foreground color for miGC */
_i_set_pen_color (S___(_plotter));
bgPixel.type = MI_PIXEL_INDEX_TYPE;
bgPixel.u.index = _plotter->drawstate->i_bg_color_index;
fgPixel.type = MI_PIXEL_INDEX_TYPE;
fgPixel.u.index = _plotter->drawstate->i_pen_color_index;
pixels[0] = bgPixel;
pixels[1] = fgPixel;
/* construct an miGC (graphics context for the libxmi module); copy
attributes from the Plotter's GC to it */
pGC = miNewGC (2, pixels);
_set_common_mi_attributes (_plotter->drawstate, (voidptr_t)pGC);
point.x = ixx;
point.y = iyy;
miDrawPoints ((miPaintedSet *)_plotter->i_painted_set,
pGC, MI_COORD_MODE_ORIGIN, 1, &point);
/* deallocate miGC */
miDeleteGC (pGC);
/* copy from painted set to canvas, and clear */
offset.x = 0;
offset.y = 0;
miCopyPaintedSetToCanvas ((miPaintedSet *)_plotter->i_painted_set,
(miCanvas *)_plotter->i_canvas,
offset);
miClearPaintedSet ((miPaintedSet *)_plotter->i_painted_set);
/* something was drawn in frame */
_plotter->i_frame_nonempty = true;
}
}
|
