tests/monitors.c - third_party/glfw - Git at Google

 //========================================================================
 // 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, &current.redBits);
         glGetIntegerv(GL_GREEN_BITS, &current.greenBits);
         glGetIntegerv(GL_BLUE_BITS, &current.blueBits);

         glfwGetWindowSize(window, &current.width, &current.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);
 }
	//========================================================================
	// 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, &current.redBits);
	glGetIntegerv(GL_GREEN_BITS, &current.greenBits);
	glGetIntegerv(GL_BLUE_BITS, &current.blueBits);

	glfwGetWindowSize(window, &current.width, &current.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);
	}