glfw/tests/cursor.c

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//========================================================================
// Cursor & input mode tests
// 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.
//
//========================================================================
//
// System cursors and input modes tests.
//
//========================================================================
#define GLFW_INCLUDE_GLU
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
static int W = 640;
static int H = 480;
static int delay = 0;
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static GLFWwindow* windows[2] = { NULL, NULL };
static GLFWwindow* activeWindow = NULL;
static GLFWcursor* cursor = NULL;
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static struct
{
int key;
double time;
} commands[] = {
{GLFW_KEY_H, 0},
{GLFW_KEY_C, 0},
{GLFW_KEY_D, 0},
{GLFW_KEY_S, 0},
{GLFW_KEY_N, 0},
{GLFW_KEY_1, 0},
{GLFW_KEY_2, 0},
{GLFW_KEY_3, 0}
};
static int CommandCount = sizeof(commands) / sizeof(commands[0]);
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static struct
{
int w, h;
} cursorSize[] = {
{ 24, 24 }, { 13, 37 }, { 5, 53 }, { 43, 64 }, { 300, 300 }
};
static int SizeCount = sizeof(cursorSize) / sizeof(cursorSize[0]);
static int currentSize = 0;
static void command_callback(int key)
{
switch (key)
{
case GLFW_KEY_H:
{
printf("H: show this help\n");
printf("C: call glfwCreateCursor()\n");
printf("D: call glfwDestroyCursor()\n");
printf("S: call glfwSetCursor()\n");
printf("N: call glfwSetCursor() with NULL\n");
printf("1: set GLFW_CURSOR_NORMAL\n");
printf("2: set GLFW_CURSOR_HIDDEN\n");
printf("3: set GLFW_CURSOR_DISABLED\n");
printf("T: enable 3s delay for all previous commands\n");
}
break;
case GLFW_KEY_C:
{
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int x, y;
GLFWimage image;
unsigned char* pixels;
if (cursor)
break;
image.width = cursorSize[currentSize].w;
image.height = cursorSize[currentSize].h;
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pixels = malloc(4 * image.width * image.height);
image.pixels = pixels;
for (y = 0; y < image.height; y++)
{
for (x = 0; x < image.width; x++)
{
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*pixels++ = 0xff;
*pixels++ = 0;
*pixels++ = 255 * y / image.height;
*pixels++ = 255 * x / image.width;
}
}
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cursor = glfwCreateCursor(&image, image.width / 2, image.height / 2);
currentSize = (currentSize + 1) % SizeCount;
free(image.pixels);
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break;
}
case GLFW_KEY_D:
{
if (cursor != NULL)
{
glfwDestroyCursor(cursor);
cursor = NULL;
}
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break;
}
case GLFW_KEY_S:
{
if (cursor != NULL)
glfwSetCursor(activeWindow, cursor);
else
printf("The cursor is not created\n");
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break;
}
case GLFW_KEY_N:
glfwSetCursor(activeWindow, NULL);
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break;
case GLFW_KEY_1:
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
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break;
case GLFW_KEY_2:
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
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break;
case GLFW_KEY_3:
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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break;
}
}
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)
{
W = width;
H = height;
glViewport(0, 0, W, H);
}
static void refresh_callback(GLFWwindow* window)
{
glfwMakeContextCurrent(window);
glClearColor(0.0f, window == activeWindow ? 0.8f : 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window);
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (action != GLFW_PRESS)
return;
switch (key)
{
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, GL_TRUE);
break;
case GLFW_KEY_T:
delay = !delay;
printf("Delay %s.\n", delay ? "enabled" : "disabled");
break;
default:
{
if (delay)
{
int i = 0;
while (i < CommandCount && commands[i].key != key)
i++;
if (i < CommandCount)
commands[i].time = glfwGetTime();
}
else
{
command_callback(key);
}
}
break;
}
}
static void focus_callback(GLFWwindow* window, int focused)
{
if (focused)
{
activeWindow = window;
refresh_callback(windows[0]);
refresh_callback(windows[1]);
}
}
int main(void)
{
int i;
GLboolean running = GL_TRUE;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
for (i = 0; i < 2; i++)
{
windows[i] = glfwCreateWindow(W, H, "Cursor testing", NULL, NULL);
if (!windows[i])
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetWindowPos(windows[i], 100 + (i & 1) * (W + 50), 100);
glfwSetWindowRefreshCallback(windows[i], refresh_callback);
glfwSetFramebufferSizeCallback(windows[i], framebuffer_size_callback);
glfwSetKeyCallback(windows[i], key_callback);
glfwSetWindowFocusCallback(windows[i], focus_callback);
glfwMakeContextCurrent(windows[i]);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(windows[i]);
}
activeWindow = windows[0];
key_callback(NULL, GLFW_KEY_H, 0, GLFW_PRESS, 0);
while (running)
{
if (delay)
{
int i;
double t = glfwGetTime();
for (i = 0; i < CommandCount; i++)
{
if (commands[i].time != 0 && t - commands[i].time >= 3.0)
{
command_callback(commands[i].key);
commands[i].time = 0;
}
}
}
running = !(glfwWindowShouldClose(windows[0]) || glfwWindowShouldClose(windows[1]));
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}