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
|
//
// Line style code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2018 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
/**
\file Fl_GDI_Graphics_Driver_line_style.cxx
\brief Line style drawing utility for Windows (GDI) platform.
*/
#include <FL/Fl.H>
#include <FL/platform.H>
#include <FL/fl_draw.H>
#include "Fl_GDI_Graphics_Driver.H"
void Fl_GDI_Graphics_Driver::line_style_unscaled(int style, float width, char* dashes) {
// According to Bill, the "default" cap and join should be the
// "fastest" mode supported for the platform. I don't know why
// they should be different (same graphics cards, etc., right?) MRS
static const DWORD Cap[4] = {PS_ENDCAP_FLAT, PS_ENDCAP_FLAT, PS_ENDCAP_ROUND, PS_ENDCAP_SQUARE};
static const DWORD Join[4] = {PS_JOIN_ROUND, PS_JOIN_MITER, PS_JOIN_ROUND, PS_JOIN_BEVEL};
int s1 = PS_GEOMETRIC | Cap[(style>>8)&3] | Join[(style>>12)&3];
DWORD a[16];
int n = 0;
if (dashes && dashes[0]) {
s1 |= PS_USERSTYLE;
for (n = 0; n < 16 && *dashes; n++) a[n] = *dashes++;
} else {
s1 |= style & 0xff; // allow them to pass any low 8 bits for style
}
if ((style || n) && !width) width = scale(); // fix cards that do nothing for 0?
if (!fl_current_xmap) color(FL_BLACK);
LOGBRUSH penbrush = {BS_SOLID,fl_RGB(),0}; // can this be fl_brush()?
int tw = width < 1? 1: width;
HPEN newpen = ExtCreatePen(s1, tw, &penbrush, n, n ? a : 0);
if (!newpen) {
Fl::error("fl_line_style(): Could not create GDI pen object.");
return;
}
HPEN oldpen = (HPEN)SelectObject(gc_, newpen);
DeleteObject(oldpen);
DeleteObject(fl_current_xmap->pen);
fl_current_xmap->pen = newpen;
}
|
