| //======================================================================== |
| // 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/glad.h> |
| #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; |
| 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); |
| |
| 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 %f\n", xscale, yscale); |
| |
| printf("Physical size: %i x %i mm (%0.2f dpi)\n", |
| width_mm, height_mm, mode->width * 25.4f / width_mm); |
| |
| 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); |
| gladLoadGLLoader((GLADloadproc) 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); |
| } |
| |