glfw/tests/modes.c

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//========================================================================
// Video mode test
// Copyright (c) Camilla Berglund <elmindreda@elmindreda.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 enumerates or verifies video modes
//
//========================================================================
#include <GL/glfw3.h>
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
#include "getopt.h"
static GLFWwindow window_handle = NULL;
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enum Mode
{
LIST_MODE,
TEST_MODE
};
static void usage(void)
{
printf("Usage: modes [-t]\n");
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printf(" modes -h\n");
}
static const char* format_mode(const GLFWvidmode* mode)
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{
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static char buffer[512];
sprintf(buffer,
"%i x %i x %i (%i %i %i)",
mode->width, mode->height,
mode->redBits + mode->greenBits + mode->blueBits,
mode->redBits, mode->greenBits, mode->blueBits);
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buffer[sizeof(buffer) - 1] = '\0';
return buffer;
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}
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void window_size_callback(GLFWwindow window, int width, int height)
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{
printf("Window resized to %ix%i\n", width, height);
glViewport(0, 0, width, height);
}
static int window_close_callback(GLFWwindow window)
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{
window_handle = NULL;
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return GL_TRUE;
}
static void key_callback(GLFWwindow window, int key, int action)
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{
if (key == GLFW_KEY_ESCAPE)
{
glfwDestroyWindow(window);
window_handle = NULL;
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}
}
static void list_modes(GLFWmonitor monitor)
{
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int count, widthMM, heightMM, dpi, i;
GLFWvidmode mode;
const GLFWvidmode* modes = glfwGetVideoModes(monitor, &count);
glfwGetVideoMode(monitor, &mode);
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printf("Name: %s (%s)\n",
glfwGetMonitorName(monitor),
glfwGetPrimaryMonitor() == monitor ? "primary" : "secondary");
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printf("Current mode: %s\n", format_mode(&mode));
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printf("Virtual position: %i %i\n",
glfwGetMonitorParam(monitor, GLFW_MONITOR_POS_X),
glfwGetMonitorParam(monitor, GLFW_MONITOR_POS_Y));
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widthMM = glfwGetMonitorParam(monitor, GLFW_MONITOR_WIDTH_MM);
heightMM = glfwGetMonitorParam(monitor, GLFW_MONITOR_HEIGHT_MM);
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dpi = (int) ((float) mode.width * 25.4f / (float) widthMM);
printf("Physical size: %i x %i mm (%i dpi)\n", widthMM, heightMM, dpi);
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printf("Modes:\n");
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for (i = 0; i < count; i++)
{
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printf("%3u: %s", (unsigned int) i, format_mode(modes + i));
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if (memcmp(&mode, modes + i, sizeof(GLFWvidmode)) == 0)
printf(" (current mode)");
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putchar('\n');
}
}
static void test_modes(GLFWmonitor monitor)
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{
int i, count;
const GLFWvidmode* modes = glfwGetVideoModes(monitor, &count);
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for (i = 0; i < count; i++)
{
const GLFWvidmode* mode = modes + i;
GLFWvidmode current;
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glfwWindowHint(GLFW_RED_BITS, mode->redBits);
glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
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printf("Testing mode %u on monitor %s: %s\n",
(unsigned int) i,
glfwGetMonitorName(monitor),
format_mode(mode));
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window_handle = glfwCreateWindow(mode->width, mode->height,
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"Video Mode Test",
glfwGetPrimaryMonitor(),
NULL);
if (!window_handle)
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{
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printf("Failed to enter mode %u: %s\n",
(unsigned int) i,
format_mode(mode));
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continue;
}
glfwSetWindowSizeCallback(window_handle, window_size_callback);
glfwSetWindowCloseCallback(window_handle, window_close_callback);
glfwSetKeyCallback(window_handle, key_callback);
glfwMakeContextCurrent(window_handle);
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glfwSwapInterval(1);
glfwSetTime(0.0);
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while (glfwGetTime() < 5.0)
{
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window_handle);
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glfwPollEvents();
if (!window_handle)
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{
printf("User terminated program\n");
glfwTerminate();
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exit(EXIT_SUCCESS);
}
}
glGetIntegerv(GL_RED_BITS, &current.redBits);
glGetIntegerv(GL_GREEN_BITS, &current.greenBits);
glGetIntegerv(GL_BLUE_BITS, &current.blueBits);
glfwGetWindowSize(window_handle, &current.width, &current.height);
if (current.redBits != mode->redBits ||
current.greenBits != mode->greenBits ||
current.blueBits != mode->blueBits)
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{
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);
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}
if (current.width != mode->width || current.height != mode->height)
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{
printf("*** Size mismatch: %ix%i instead of %ix%i\n",
current.width, current.height,
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mode->width, mode->height);
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}
printf("Closing window\n");
glfwDestroyWindow(window_handle);
window_handle = NULL;
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glfwPollEvents();
}
}
int main(int argc, char** argv)
{
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int ch, i, count, mode = LIST_MODE;
const GLFWmonitor* monitors;
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while ((ch = getopt(argc, argv, "th")) != -1)
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{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 't':
mode = TEST_MODE;
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
argc -= optind;
argv += optind;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
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monitors = glfwGetMonitors(&count);
for (i = 0; i < count; i++)
{
if (mode == LIST_MODE)
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list_modes(monitors[i]);
else if (mode == TEST_MODE)
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test_modes(monitors[i]);
}
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glfwTerminate();
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exit(EXIT_SUCCESS);
}