ref: c454f4426dea6fd05b76a56e7990790abd61c01c
dir: /external/glfw/tests/monitors.c/
//======================================================================== // Monitor information tool // 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 prints monitor and video mode information or verifies video // modes // //======================================================================== #include <glad/gl.h> #define GLFW_INCLUDE_NONE #include <GLFW/glfw3.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include "getopt.h" enum Mode { LIST_MODE, TEST_MODE }; static void usage(void) { printf("Usage: monitors [-t]\n"); printf(" monitors -h\n"); } static int euclid(int a, int b) { return b ? euclid(b, a % b) : a; } static const char* format_mode(const GLFWvidmode* mode) { static char buffer[512]; const int gcd = euclid(mode->width, mode->height); snprintf(buffer, sizeof(buffer), "%i x %i x %i (%i:%i) (%i %i %i) %i Hz", mode->width, mode->height, mode->redBits + mode->greenBits + mode->blueBits, mode->width / gcd, mode->height / gcd, mode->redBits, mode->greenBits, mode->blueBits, mode->refreshRate); buffer[sizeof(buffer) - 1] = '\0'; return buffer; } static void error_callback(int error, const char* description) { fprintf(stderr, "Error: %s\n", description); } static void framebuffer_size_callback(GLFWwindow* window, int width, int height) { printf("Framebuffer resized to %ix%i\n", width, height); glViewport(0, 0, width, height); } static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) { if (key == GLFW_KEY_ESCAPE) glfwSetWindowShouldClose(window, GLFW_TRUE); } static void list_modes(GLFWmonitor* monitor) { int count, x, y, width_mm, height_mm, i; int workarea_x, workarea_y, workarea_width, workarea_height; float xscale, yscale; const GLFWvidmode* mode = glfwGetVideoMode(monitor); const GLFWvidmode* modes = glfwGetVideoModes(monitor, &count); glfwGetMonitorPos(monitor, &x, &y); glfwGetMonitorPhysicalSize(monitor, &width_mm, &height_mm); glfwGetMonitorContentScale(monitor, &xscale, &yscale); glfwGetMonitorWorkarea(monitor, &workarea_x, &workarea_y, &workarea_width, &workarea_height); printf("Name: %s (%s)\n", glfwGetMonitorName(monitor), glfwGetPrimaryMonitor() == monitor ? "primary" : "secondary"); printf("Current mode: %s\n", format_mode(mode)); printf("Virtual position: %i, %i\n", x, y); printf("Content scale: %f x %f\n", xscale, yscale); printf("Physical size: %i x %i mm (%0.2f dpi at %i x %i)\n", width_mm, height_mm, mode->width * 25.4f / width_mm, mode->width, mode->height); printf("Monitor work area: %i x %i starting at %i, %i\n", workarea_width, workarea_height, workarea_x, workarea_y); printf("Modes:\n"); for (i = 0; i < count; i++) { printf("%3u: %s", (unsigned int) i, format_mode(modes + i)); if (memcmp(mode, modes + i, sizeof(GLFWvidmode)) == 0) printf(" (current mode)"); putchar('\n'); } } static void test_modes(GLFWmonitor* monitor) { int i, count; GLFWwindow* window; const GLFWvidmode* modes = glfwGetVideoModes(monitor, &count); for (i = 0; i < count; i++) { const GLFWvidmode* mode = modes + i; GLFWvidmode current; glfwWindowHint(GLFW_RED_BITS, mode->redBits); glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits); glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits); glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate); printf("Testing mode %u on monitor %s: %s\n", (unsigned int) i, glfwGetMonitorName(monitor), format_mode(mode)); window = glfwCreateWindow(mode->width, mode->height, "Video Mode Test", glfwGetPrimaryMonitor(), NULL); if (!window) { printf("Failed to enter mode %u: %s\n", (unsigned int) i, format_mode(mode)); continue; } glfwSetFramebufferSizeCallback(window, framebuffer_size_callback); glfwSetKeyCallback(window, key_callback); glfwMakeContextCurrent(window); gladLoadGL(glfwGetProcAddress); glfwSwapInterval(1); glfwSetTime(0.0); while (glfwGetTime() < 5.0) { glClear(GL_COLOR_BUFFER_BIT); glfwSwapBuffers(window); glfwPollEvents(); if (glfwWindowShouldClose(window)) { printf("User terminated program\n"); glfwTerminate(); exit(EXIT_SUCCESS); } } glGetIntegerv(GL_RED_BITS, ¤t.redBits); glGetIntegerv(GL_GREEN_BITS, ¤t.greenBits); glGetIntegerv(GL_BLUE_BITS, ¤t.blueBits); glfwGetWindowSize(window, ¤t.width, ¤t.height); if (current.redBits != mode->redBits || current.greenBits != mode->greenBits || current.blueBits != mode->blueBits) { printf("*** Color bit mismatch: (%i %i %i) instead of (%i %i %i)\n", current.redBits, current.greenBits, current.blueBits, mode->redBits, mode->greenBits, mode->blueBits); } if (current.width != mode->width || current.height != mode->height) { printf("*** Size mismatch: %ix%i instead of %ix%i\n", current.width, current.height, mode->width, mode->height); } printf("Closing window\n"); glfwDestroyWindow(window); window = NULL; glfwPollEvents(); } } int main(int argc, char** argv) { int ch, i, count, mode = LIST_MODE; GLFWmonitor** monitors; while ((ch = getopt(argc, argv, "th")) != -1) { switch (ch) { case 'h': usage(); exit(EXIT_SUCCESS); case 't': mode = TEST_MODE; break; default: usage(); exit(EXIT_FAILURE); } } glfwSetErrorCallback(error_callback); if (!glfwInit()) exit(EXIT_FAILURE); monitors = glfwGetMonitors(&count); for (i = 0; i < count; i++) { if (mode == LIST_MODE) list_modes(monitors[i]); else if (mode == TEST_MODE) test_modes(monitors[i]); } glfwTerminate(); exit(EXIT_SUCCESS); }