1 //========================================================================
2 // Window icon test program
3 // Copyright (c) Camilla Löwy <elmindreda@glfw.org>
4 //
5 // This software is provided 'as-is', without any express or implied
6 // warranty. In no event will the authors be held liable for any damages
7 // arising from the use of this software.
8 //
9 // Permission is granted to anyone to use this software for any purpose,
10 // including commercial applications, and to alter it and redistribute it
11 // freely, subject to the following restrictions:
12 //
13 // 1. The origin of this software must not be misrepresented; you must not
14 // claim that you wrote the original software. If you use this software
15 // in a product, an acknowledgment in the product documentation would
16 // be appreciated but is not required.
17 //
18 // 2. Altered source versions must be plainly marked as such, and must not
19 // be misrepresented as being the original software.
20 //
21 // 3. This notice may not be removed or altered from any source
22 // distribution.
23 //
24 //========================================================================
25 //
26 // This program is used to test the icon feature.
27 //
28 //========================================================================
29
30 #define GLAD_GL_IMPLEMENTATION
31 #include <glad/gl.h>
32 #define GLFW_INCLUDE_NONE
33 #include <GLFW/glfw3.h>
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 // a simple glfw logo
40 const char* const logo[] =
41 {
42 "................",
43 "................",
44 "...0000..0......",
45 "...0.....0......",
46 "...0.00..0......",
47 "...0..0..0......",
48 "...0000..0000...",
49 "................",
50 "................",
51 "...000..0...0...",
52 "...0....0...0...",
53 "...000..0.0.0...",
54 "...0....0.0.0...",
55 "...0....00000...",
56 "................",
57 "................"
58 };
59
60 const unsigned char icon_colors[5][4] =
61 {
62 { 0, 0, 0, 255 }, // black
63 { 255, 0, 0, 255 }, // red
64 { 0, 255, 0, 255 }, // green
65 { 0, 0, 255, 255 }, // blue
66 { 255, 255, 255, 255 } // white
67 };
68
69 static int cur_icon_color = 0;
70
set_icon(GLFWwindow * window,int icon_color)71 static void set_icon(GLFWwindow* window, int icon_color)
72 {
73 int x, y;
74 unsigned char pixels[16 * 16 * 4];
75 unsigned char* target = pixels;
76 GLFWimage img = { 16, 16, pixels };
77
78 for (y = 0; y < img.width; y++)
79 {
80 for (x = 0; x < img.height; x++)
81 {
82 if (logo[y][x] == '0')
83 memcpy(target, icon_colors[icon_color], 4);
84 else
85 memset(target, 0, 4);
86
87 target += 4;
88 }
89 }
90
91 glfwSetWindowIcon(window, 1, &img);
92 }
93
key_callback(GLFWwindow * window,int key,int scancode,int action,int mods)94 static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
95 {
96 if (action != GLFW_PRESS)
97 return;
98
99 switch (key)
100 {
101 case GLFW_KEY_ESCAPE:
102 glfwSetWindowShouldClose(window, GLFW_TRUE);
103 break;
104 case GLFW_KEY_SPACE:
105 cur_icon_color = (cur_icon_color + 1) % 5;
106 set_icon(window, cur_icon_color);
107 break;
108 case GLFW_KEY_X:
109 glfwSetWindowIcon(window, 0, NULL);
110 break;
111 }
112 }
113
main(int argc,char ** argv)114 int main(int argc, char** argv)
115 {
116 GLFWwindow* window;
117
118 if (!glfwInit())
119 {
120 fprintf(stderr, "Failed to initialize GLFW\n");
121 exit(EXIT_FAILURE);
122 }
123
124 window = glfwCreateWindow(200, 200, "Window Icon", NULL, NULL);
125 if (!window)
126 {
127 glfwTerminate();
128
129 fprintf(stderr, "Failed to open GLFW window\n");
130 exit(EXIT_FAILURE);
131 }
132
133 glfwMakeContextCurrent(window);
134 gladLoadGL(glfwGetProcAddress);
135
136 glfwSetKeyCallback(window, key_callback);
137 set_icon(window, cur_icon_color);
138
139 while (!glfwWindowShouldClose(window))
140 {
141 glClear(GL_COLOR_BUFFER_BIT);
142 glfwSwapBuffers(window);
143 glfwWaitEvents();
144 }
145
146 glfwDestroyWindow(window);
147 glfwTerminate();
148 exit(EXIT_SUCCESS);
149 }
150
151