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git-subtree-dir: deps/nostalgia
git-subtree-split: 9cb6bd4a32e9f39a858f72443ff5c6d40489fe22
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Gary Talent
2023-12-23 14:17:05 -06:00
commit 587dd92414
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//========================================================================
// 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);
}