glfw_input_bounce.c

#include <stdio.h>
#include <unistd.h>
#include <GLFW/glfw3.h>

// -----------------------------------------------------------------------------
// GLFW helpers
void glfw_key_callback(GLFWwindow *window, int key, int scan, int action, int mod);

static char keyMap[GLFW_KEY_LAST+1] = {0};

// -----------------------------------------------------------------------------
// main program
int main(void)
{
	GLFWwindow *window;

	glfwInit();
	window = glfwCreateWindow(200, 200, "Keyboard Test", NULL, NULL);
	glfwSetKeyCallback(window, glfw_key_callback);

	while (!glfwWindowShouldClose(window)) {
		glfwPollEvents();
		if (keyMap[GLFW_KEY_UP])
			printf("1\n");
		else
			printf("0\n");
		usleep(16667); // ~60 fps
	}

	glfwDestroyWindow(window);
	glfwTerminate();

	return 0;
}

void glfw_key_callback(GLFWwindow *window, int key, int scan, int action, int mod)
{
	if (action == GLFW_PRESS && key == GLFW_KEY_Q)
		glfwSetWindowShouldClose(window, GL_TRUE);

	if (action == GLFW_PRESS) {
		printf("PRESS\n");
		keyMap[key] = 1;
	} else if (action == GLFW_RELEASE) {
		printf("RELEASE\n");
		keyMap[key] = 0;
	}
}