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1//========================================================================
2// Event wait timeout test
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 test is intended to verify that waiting for events with timeout works
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 <time.h>
36#include <math.h>
37#include <stdio.h>
38#include <stdlib.h>
39
40static void error_callback(int error, const char* description)
41{
42    fprintf(stderr, "Error: %s\n", description);
43}
44
45static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
46{
47    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
48        glfwSetWindowShouldClose(window, GLFW_TRUE);
49}
50
51static float nrand(void)
52{
53    return (float) rand() / (float) RAND_MAX;
54}
55
56int main(void)
57{
58    GLFWwindow* window;
59
60    srand((unsigned int) time(NULL));
61
62    glfwSetErrorCallback(error_callback);
63
64    if (!glfwInit())
65        exit(EXIT_FAILURE);
66
67    window = glfwCreateWindow(640, 480, "Event Wait Timeout Test", NULL, NULL);
68    if (!window)
69    {
70        glfwTerminate();
71        exit(EXIT_FAILURE);
72    }
73
74    glfwMakeContextCurrent(window);
75    gladLoadGL(glfwGetProcAddress);
76    glfwSetKeyCallback(window, key_callback);
77
78    while (!glfwWindowShouldClose(window))
79    {
80        int width, height;
81        float r = nrand(), g = nrand(), b = nrand();
82        float l = (float) sqrt(r * r + g * g + b * b);
83
84        glfwGetFramebufferSize(window, &width, &height);
85
86        glViewport(0, 0, width, height);
87        glClearColor(r / l, g / l, b / l, 1.f);
88        glClear(GL_COLOR_BUFFER_BIT);
89        glfwSwapBuffers(window);
90
91        glfwWaitEventsTimeout(1.0);
92    }
93
94    glfwDestroyWindow(window);
95
96    glfwTerminate();
97    exit(EXIT_SUCCESS);
98}
99
100
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