ref: ad5785611bfb6f71c7dd86d7d52e620cd5dbe208
dir: /external/glfw/tests/reopen.c/
//========================================================================
// Window re-opener (open/close stress test)
// Copyright (c) Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
//
// This test came about as the result of bug #1262773
//
// It closes and re-opens the GLFW window every five seconds, alternating
// between windowed and full screen mode
//
// It also times and logs opening and closing actions and attempts to separate
// user initiated window closing from its own
//
//========================================================================
#include <glad/gl.h>
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include "linmath.h"
static const char* vertex_shader_text =
"#version 110\n"
"uniform mat4 MVP;\n"
"attribute vec2 vPos;\n"
"void main()\n"
"{\n"
" gl_Position = MVP * vec4(vPos, 0.0, 1.0);\n"
"}\n";
static const char* fragment_shader_text =
"#version 110\n"
"void main()\n"
"{\n"
" gl_FragColor = vec4(1.0);\n"
"}\n";
static const vec2 vertices[4] =
{
{ -0.5f, -0.5f },
{ 0.5f, -0.5f },
{ 0.5f, 0.5f },
{ -0.5f, 0.5f }
};
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void window_close_callback(GLFWwindow* window)
{
printf("Close callback triggered\n");
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (action != GLFW_PRESS)
return;
switch (key)
{
case GLFW_KEY_Q:
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, GLFW_TRUE);
break;
}
}
static void close_window(GLFWwindow* window)
{
double base = glfwGetTime();
glfwDestroyWindow(window);
printf("Closing window took %0.3f seconds\n", glfwGetTime() - base);
}
int main(int argc, char** argv)
{
int count = 0;
double base;
GLFWwindow* window;
srand((unsigned int) time(NULL));
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
for (;;)
{
int width, height;
GLFWmonitor* monitor = NULL;
GLuint vertex_shader, fragment_shader, program, vertex_buffer;
GLint mvp_location, vpos_location;
if (count & 1)
{
int monitorCount;
GLFWmonitor** monitors = glfwGetMonitors(&monitorCount);
monitor = monitors[rand() % monitorCount];
}
if (monitor)
{
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
width = mode->width;
height = mode->height;
}
else
{
width = 640;
height = 480;
}
base = glfwGetTime();
window = glfwCreateWindow(width, height, "Window Re-opener", monitor, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
if (monitor)
{
printf("Opening full screen window on monitor %s took %0.3f seconds\n",
glfwGetMonitorName(monitor),
glfwGetTime() - base);
}
else
{
printf("Opening regular window took %0.3f seconds\n",
glfwGetTime() - base);
}
glfwSetWindowCloseCallback(window, window_close_callback);
glfwSetKeyCallback(window, key_callback);
glfwMakeContextCurrent(window);
gladLoadGL(glfwGetProcAddress);
glfwSwapInterval(1);
vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex_shader, 1, &vertex_shader_text, NULL);
glCompileShader(vertex_shader);
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment_shader, 1, &fragment_shader_text, NULL);
glCompileShader(fragment_shader);
program = glCreateProgram();
glAttachShader(program, vertex_shader);
glAttachShader(program, fragment_shader);
glLinkProgram(program);
mvp_location = glGetUniformLocation(program, "MVP");
vpos_location = glGetAttribLocation(program, "vPos");
glGenBuffers(1, &vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(vpos_location);
glVertexAttribPointer(vpos_location, 2, GL_FLOAT, GL_FALSE,
sizeof(vertices[0]), (void*) 0);
glfwSetTime(0.0);
while (glfwGetTime() < 5.0)
{
float ratio;
int width, height;
mat4x4 m, p, mvp;
glfwGetFramebufferSize(window, &width, &height);
ratio = width / (float) height;
glViewport(0, 0, width, height);
glClear(GL_COLOR_BUFFER_BIT);
mat4x4_ortho(p, -ratio, ratio, -1.f, 1.f, 0.f, 1.f);
mat4x4_identity(m);
mat4x4_rotate_Z(m, m, (float) glfwGetTime());
mat4x4_mul(mvp, p, m);
glUseProgram(program);
glUniformMatrix4fv(mvp_location, 1, GL_FALSE, (const GLfloat*) mvp);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glfwSwapBuffers(window);
glfwPollEvents();
if (glfwWindowShouldClose(window))
{
close_window(window);
printf("User closed window\n");
glfwTerminate();
exit(EXIT_SUCCESS);
}
}
printf("Closing window\n");
close_window(window);
count++;
}
glfwTerminate();
}