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comparison mupdf-source/thirdparty/freeglut/progs/demos/multi-touch/multi-touch.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /**
2 * Sample multi-touch program that displays a square where a cursor
3 * clicks, with a different color for each cursor.
4 *
5 * Copyright (C) 2012 Sylvain Beucler
6 *
7 * Permission is hereby granted, free of charge, to any person
8 * obtaining a copy of this software and associated documentation
9 * files (the "Software"), to deal in the Software without
10 * restriction, including without limitation the rights to use, copy,
11 * modify, merge, publish, distribute, sublicense, and/or sell copies
12 * of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be
16 * included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
22 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
23 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31
32 #include <GL/freeglut.h>
33 #include <GL/gl.h>
34
35 #define NUM_DEVICES 16
36 #define NUM_CURSORS 64
37 typedef struct cursor {
38 char on;
39 float x;
40 float y;
41 } *Cursor;
42 struct cursor cursors[NUM_DEVICES][NUM_CURSORS];
43
44
45 static float square[] = {
46 -.5, -.5,
47 .5, -.5,
48 -.5, .5,
49 .5, .5,
50 };
51
52 void onDisplay(void) {
53 int d;
54 glClearColor(0,0,0,1);
55 glClear(GL_COLOR_BUFFER_BIT);
56
57 glEnableClientState(GL_VERTEX_ARRAY);
58 glVertexPointer(2, GL_FLOAT, 0, square);
59 for (d = 0; d < NUM_DEVICES; d++) {
60 int c;
61 for (c = 0; d < NUM_DEVICES; d++) {
62 Cursor C = &cursors[d][c];
63 if (C->on) {
64 glMatrixMode(GL_MODELVIEW);
65 glLoadIdentity();
66 glTranslatef(C->x, C->y, 0);
67 glScalef(30, 30, 1);
68
69 switch(c) {
70 case 0:
71 glColor4f(0,0,1,1);
72 break;
73 case 1:
74 glColor4f(0,1,0,1);
75 break;
76 case 2:
77 glColor4f(1,0,0,1);
78 break;
79 case 3:
80 glColor4f(1,1,1,1);
81 break;
82 default:
83 glColor4d(.5,.5,.5,1);
84 break;
85 }
86 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
87 }
88 }
89 }
90 glDisableClientState(GL_VERTEX_ARRAY);
91
92 glutSwapBuffers();
93 }
94
95 void onMouse(int button, int state, int x, int y) {
96 if (button == 0) {
97 cursors[0][0].on = (state == GLUT_DOWN);
98 cursors[0][0].x = (float)x;
99 cursors[0][0].y = (float)y;
100 printf("normal click\n");
101 }
102 }
103
104 void onMotion(int x, int y) {
105 cursors[0][0].x = (float)x;
106 cursors[0][0].y = (float)y;
107 }
108
109 /* Using FG2.8 (reversed) prototype for now */
110 /* void onMultiButton(int cursor_id, int button, int state, int x, int y) { */
111 void onMultiButton(int cursor_id, int x, int y, int button, int state) {
112 if (cursor_id > NUM_CURSORS) {
113 fprintf(stderr, "cursor_id(%d) > NUM_CURSORS(%d)\n", cursor_id, NUM_CURSORS);
114 return;
115 }
116 if (button == 0) {
117 cursors[0][cursor_id].on = (state == GLUT_DOWN);
118 cursors[0][cursor_id].x = (float)x;
119 cursors[0][cursor_id].y = (float)y;
120 printf("multi-touch %d click\n", cursor_id);
121 }
122 }
123
124 void onMultiMotion(int cursor_id, int x, int y) {
125 if (cursor_id > NUM_CURSORS) {
126 fprintf(stderr, "cursor_id(%d) > NUM_CURSORS(%d)\n", cursor_id, NUM_CURSORS);
127 return;
128 }
129 cursors[0][cursor_id].x = (float)x;
130 cursors[0][cursor_id].y = (float)y;
131 }
132
133 void onReshape(int width, int height) {
134 glViewport(0, 0, width, height);
135
136 glMatrixMode(GL_PROJECTION);
137 glOrtho(0, width, height, 0, -1, 1);
138 }
139
140 void onIdle(void) {
141 glutPostRedisplay();
142 }
143
144 int main(int argc, char* argv[]) {
145 memset(cursors, 0, sizeof(cursors));
146
147 glutInit(&argc, argv);
148 glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE);
149 glutInitWindowSize(640, 480);
150 glutCreateWindow("Multi-touch test");
151
152 glutDisplayFunc(onDisplay);
153 glutReshapeFunc(onReshape);
154 glutIdleFunc(onIdle);
155 glutMouseFunc(onMouse);
156 glutMotionFunc(onMotion);
157 glutMultiButtonFunc(onMultiButton);
158 glutMultiMotionFunc(onMultiMotion);
159
160 glutMainLoop();
161
162 return EXIT_SUCCESS;
163 }