| rev |
line source |
|
nuclear@1
|
1 /* Simple libdrawtext example.
|
|
nuclear@1
|
2 *
|
|
nuclear@1
|
3 * Important parts are marked with XXX comments.
|
|
nuclear@1
|
4 */
|
|
nuclear@1
|
5 #include <stdio.h>
|
|
nuclear@1
|
6 #include <stdlib.h>
|
|
nuclear@1
|
7
|
|
nuclear@1
|
8 #ifndef __APPLE__
|
|
nuclear@1
|
9 #include <GL/glut.h>
|
|
nuclear@1
|
10 #else
|
|
nuclear@1
|
11 #include <GLUT/glut.h>
|
|
nuclear@1
|
12 #endif
|
|
nuclear@1
|
13
|
|
nuclear@1
|
14 #include "drawtext.h"
|
|
nuclear@1
|
15
|
|
nuclear@1
|
16 void disp(void);
|
|
nuclear@1
|
17 void reshape(int x, int y);
|
|
nuclear@1
|
18 void keyb(unsigned char key, int x, int y);
|
|
nuclear@1
|
19
|
|
nuclear@1
|
20 /* XXX fonts are represented by the opaque struct dtx_font type, so you
|
|
nuclear@1
|
21 * need to create at least one with dtx_open_font (see main).
|
|
nuclear@1
|
22 */
|
|
nuclear@1
|
23 struct dtx_font *font;
|
|
nuclear@1
|
24
|
|
nuclear@1
|
25 int main(int argc, char **argv)
|
|
nuclear@1
|
26 {
|
|
nuclear@1
|
27 glutInit(&argc, argv);
|
|
nuclear@1
|
28 glutInitWindowSize(512, 384);
|
|
nuclear@1
|
29 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
|
|
nuclear@1
|
30 glutCreateWindow("libdrawtext example: simple");
|
|
nuclear@1
|
31
|
|
nuclear@1
|
32 glutDisplayFunc(disp);
|
|
nuclear@1
|
33 glutReshapeFunc(reshape);
|
|
nuclear@1
|
34 glutKeyboardFunc(keyb);
|
|
nuclear@1
|
35
|
|
nuclear@1
|
36 /* XXX dtx_open_font opens a font file and returns a pointer to dtx_font */
|
|
nuclear@1
|
37 if(!(font = dtx_open_font("serif.ttf", 24))) {
|
|
nuclear@1
|
38 fprintf(stderr, "failed to open font\n");
|
|
nuclear@1
|
39 return 1;
|
|
nuclear@1
|
40 }
|
|
nuclear@1
|
41 /* XXX select the font and size to render with by calling dtx_use_font
|
|
nuclear@1
|
42 * if you want to use a different font size, you must first call:
|
|
nuclear@1
|
43 * dtx_prepare(font, size) once.
|
|
nuclear@1
|
44 */
|
|
nuclear@1
|
45 dtx_use_font(font, 24);
|
|
nuclear@1
|
46
|
|
nuclear@1
|
47 glutMainLoop();
|
|
nuclear@1
|
48 return 0;
|
|
nuclear@1
|
49 }
|
|
nuclear@1
|
50
|
|
nuclear@1
|
51 const char *text = "Some sample text goes here.\n"
|
|
nuclear@1
|
52 "Yada yada yada, more text...\n"
|
|
nuclear@1
|
53 "foobar xyzzy\n";
|
|
nuclear@1
|
54
|
|
nuclear@1
|
55 void disp(void)
|
|
nuclear@1
|
56 {
|
|
nuclear@1
|
57 glClear(GL_COLOR_BUFFER_BIT);
|
|
nuclear@1
|
58
|
|
nuclear@1
|
59 glMatrixMode(GL_MODELVIEW);
|
|
nuclear@1
|
60 glLoadIdentity();
|
|
nuclear@1
|
61
|
|
nuclear@1
|
62 glPushMatrix();
|
|
nuclear@1
|
63 glTranslatef(-200, 150, 0);
|
|
nuclear@1
|
64 glColor3f(1, 1, 1);
|
|
nuclear@1
|
65 /* XXX call dtx_string to draw utf-8 text.
|
|
nuclear@1
|
66 * any transformations and the current color apply
|
|
nuclear@1
|
67 */
|
|
nuclear@1
|
68 dtx_string(text);
|
|
nuclear@1
|
69 glPopMatrix();
|
|
nuclear@1
|
70
|
|
nuclear@1
|
71 glPushMatrix();
|
|
nuclear@1
|
72 glTranslatef(-200, 50, 0);
|
|
nuclear@1
|
73 glScalef(2, 0.7, 1);
|
|
nuclear@1
|
74 glColor3f(0.6, 0.7, 1.0);
|
|
nuclear@1
|
75 dtx_string(text);
|
|
nuclear@1
|
76 glPopMatrix();
|
|
nuclear@1
|
77
|
|
nuclear@1
|
78 glPushMatrix();
|
|
nuclear@1
|
79 glTranslatef(-80, -90, 0);
|
|
nuclear@1
|
80 glRotatef(20, 0, 0, 1);
|
|
nuclear@1
|
81 glColor3f(1.0, 0.7, 0.6);
|
|
nuclear@1
|
82 dtx_string(text);
|
|
nuclear@1
|
83 glPopMatrix();
|
|
nuclear@1
|
84
|
|
nuclear@1
|
85 glutSwapBuffers();
|
|
nuclear@1
|
86 }
|
|
nuclear@1
|
87
|
|
nuclear@1
|
88 void reshape(int x, int y)
|
|
nuclear@1
|
89 {
|
|
nuclear@1
|
90 glViewport(0, 0, x, y);
|
|
nuclear@1
|
91
|
|
nuclear@1
|
92 glMatrixMode(GL_PROJECTION);
|
|
nuclear@1
|
93 glLoadIdentity();
|
|
nuclear@1
|
94 glOrtho(-x/2, x/2, -y/2, y/2, -1, 1);
|
|
nuclear@1
|
95 }
|
|
nuclear@1
|
96
|
|
nuclear@1
|
97 void keyb(unsigned char key, int x, int y)
|
|
nuclear@1
|
98 {
|
|
nuclear@1
|
99 if(key == 27) {
|
|
nuclear@1
|
100 exit(0);
|
|
nuclear@1
|
101 }
|
|
nuclear@1
|
102 }
|
