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//========================================================================
// Simple multi-window test
// 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 creates four windows and clears each in a different color
//
//========================================================================
#include <glad/gl.h>
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
#include "getopt.h"
static const char* titles[] =
{
"Red",
"Green",
"Blue",
"Yellow"
};
static const struct
{
float r, g, b;
} colors[] =
{
{ 0.95f, 0.32f, 0.11f },
{ 0.50f, 0.80f, 0.16f },
{ 0.f, 0.68f, 0.94f },
{ 0.98f, 0.74f, 0.04f }
};
static void usage(void)
{
printf("Usage: windows [-h] [-b] [-f] \n");
printf("Options:\n");
printf(" -b create decorated windows\n");
printf(" -f set focus on show off for all but first window\n");
printf(" -h show this help\n");
}
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (action != GLFW_PRESS)
return;
switch (key)
{
case GLFW_KEY_SPACE:
{
int xpos, ypos;
glfwGetWindowPos(window, &xpos, &ypos);
glfwSetWindowPos(window, xpos, ypos);
break;
}
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, GLFW_TRUE);
break;
}
}
int main(int argc, char** argv)
{
int i, ch;
int decorated = GLFW_FALSE;
int focusOnShow = GLFW_TRUE;
int running = GLFW_TRUE;
GLFWwindow* windows[4];
while ((ch = getopt(argc, argv, "bfh")) != -1)
{
switch (ch)
{
case 'b':
decorated = GLFW_TRUE;
break;
case 'f':
focusOnShow = GLFW_FALSE;
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
default:
usage();
exit(EXIT_FAILURE);
}
}
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_DECORATED, decorated);
glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
for (i = 0; i < 4; i++)
{
int left, top, right, bottom;
if (i)
glfwWindowHint(GLFW_FOCUS_ON_SHOW, focusOnShow);
windows[i] = glfwCreateWindow(200, 200, titles[i], NULL, NULL);
if (!windows[i])
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetKeyCallback(windows[i], key_callback);
glfwMakeContextCurrent(windows[i]);
gladLoadGL(glfwGetProcAddress);
glClearColor(colors[i].r, colors[i].g, colors[i].b, 1.f);
glfwGetWindowFrameSize(windows[i], &left, &top, &right, &bottom);
glfwSetWindowPos(windows[i],
100 + (i & 1) * (200 + left + right),
100 + (i >> 1) * (200 + top + bottom));
}
for (i = 0; i < 4; i++)
glfwShowWindow(windows[i]);
while (running)
{
for (i = 0; i < 4; i++)
{
glfwMakeContextCurrent(windows[i]);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(windows[i]);
if (glfwWindowShouldClose(windows[i]))
running = GLFW_FALSE;
}
glfwWaitEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
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