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1//========================================================================
2// Window icon test program
3// Copyright (c) Camilla Löwy <[email protected]>
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
40const 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
60const 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
69static int cur_icon_color = 0;
70
71static 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
94static 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
114int 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
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