ref: 72ca3bb20732e83543cad5b944cea02958796200
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(); }