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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
//
// "$Id$"
//
// Portable drawing routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2011 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:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
/**
\file fl_vertex.cxx
\brief Portable drawing code for drawing arbitrary shapes with
simple 2D transformations.
*/
// Portable drawing code for drawing arbitrary shapes with
// simple 2D transformations. See also fl_arc.cxx
// matt: the Quartz implementation purposely doesn't use the Quartz matrix
// operations for reasons of compatibility and maintainability
#if defined(WIN32) || defined(__APPLE__)
#elif defined(FL_PORTING)
# pragma message "FL_PORTING: implement functions below for vector drawing"
#else
#endif
#include <config.h>
#include "config_lib.h"
#include <FL/fl_draw.H>
#include <FL/x.H>
#include <FL/Fl.H>
#include <FL/math.h>
#include <stdlib.h>
void Fl_Graphics_Driver::push_matrix() {
if (sptr==matrix_stack_size)
Fl::error("fl_push_matrix(): matrix stack overflow.");
else
stack[sptr++] = m;
}
void Fl_Graphics_Driver::pop_matrix() {
if (sptr==0)
Fl::error("fl_pop_matrix(): matrix stack underflow.");
else
m = stack[--sptr];
}
void Fl_Graphics_Driver::mult_matrix(double a, double b, double c, double d, double x, double y) {
matrix o;
o.a = a*m.a + b*m.c;
o.b = a*m.b + b*m.d;
o.c = c*m.a + d*m.c;
o.d = c*m.b + d*m.d;
o.x = x*m.a + y*m.c + m.x;
o.y = x*m.b + y*m.d + m.y;
m = o;
}
void Fl_Graphics_Driver::rotate(double d) {
if (d) {
double s, c;
if (d == 0) {s = 0; c = 1;}
else if (d == 90) {s = 1; c = 0;}
else if (d == 180) {s = 0; c = -1;}
else if (d == 270 || d == -90) {s = -1; c = 0;}
else {s = sin(d*M_PI/180); c = cos(d*M_PI/180);}
mult_matrix(c,-s,s,c,0,0);
}
}
void Fl_Graphics_Driver::scale(double x, double y) {
mult_matrix(x,0,0,y,0,0);
}
void Fl_Graphics_Driver::scale(double x) {
mult_matrix(x,0,0,x,0,0);
}
void Fl_Graphics_Driver::translate(double x,double y) {
mult_matrix(1,0,0,1,x,y);
}
void Fl_Graphics_Driver::begin_points() {
n = 0;
what = POINT_;
}
void Fl_Graphics_Driver::begin_line() {
n = 0;
what = LINE;
}
void Fl_Graphics_Driver::begin_loop() {
n = 0;
what = LOOP;
}
void Fl_Graphics_Driver::begin_polygon() {
n = 0;
what = POLYGON;
}
double Fl_Graphics_Driver::transform_x(double x, double y) {
return x*m.a + y*m.c + m.x;
}
double Fl_Graphics_Driver::transform_y(double x, double y) {
return x*m.b + y*m.d + m.y;
}
double Fl_Graphics_Driver::transform_dx(double x, double y) {
return x*m.a + y*m.c;
}
double Fl_Graphics_Driver::transform_dy(double x, double y) {
return x*m.b + y*m.d;
}
void Fl_Graphics_Driver::transformed_vertex0(COORD_T x, COORD_T y) {
if (!n || x != p[n-1].x || y != p[n-1].y) {
if (n >= p_size) {
p_size = p ? 2*p_size : 16;
p = (XPOINT*)realloc((void*)p, p_size*sizeof(*p));
}
p[n].x = x;
p[n].y = y;
n++;
}
}
void Fl_Graphics_Driver::fixloop() { // remove equal points from closed path
while (n>2 && p[n-1].x == p[0].x && p[n-1].y == p[0].y) n--;
}
// -----------------------------------------------------------------------------
// Remove #ifndef FL_LIBRARY_CMAKE and the entire block of #include
// statements when the new build system is ready:
#ifndef FL_LIBRARY_CMAKE
// -----------------------------------------------------------------------------
// Apple Quartz graphics driver "drivers/Quartz/Fl_Quartz_Graphics_Driver_vertex.cxx"
// -----------------------------------------------------------------------------
#ifdef FL_CFG_GFX_GDI
# include "drivers/GDI/Fl_GDI_Graphics_Driver_vertex.cxx"
#endif
// -----------------------------------------------------------------------------
#ifdef FL_CFG_GFX_XLIB
# include "drivers/Xlib/Fl_Xlib_Graphics_Driver_vertex.cxx"
#endif
// -----------------------------------------------------------------------------
#endif // FL_LIBRARY_CMAKE
// -----------------------------------------------------------------------------
//
// End of "$Id$".
//
|
