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216 lines
5.6 KiB
216 lines
5.6 KiB
//========================================================================
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// Joystick input test
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// Copyright (c) Camilla Berglund <elmindreda@glfw.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//
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// This test displays the state of every button and axis of every connected
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// joystick and/or gamepad
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//
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//========================================================================
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifdef _MSC_VER
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#define strdup(x) _strdup(x)
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#endif
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static int joysticks[GLFW_JOYSTICK_LAST + 1];
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static int joystick_count = 0;
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static void error_callback(int error, const char* description)
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{
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fprintf(stderr, "Error: %s\n", description);
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}
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static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
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{
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glViewport(0, 0, width, height);
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}
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static void draw_joystick(int index, int x, int y, int width, int height)
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{
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int i;
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int axis_count, button_count;
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const float* axes;
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const unsigned char* buttons;
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const int axis_height = 3 * height / 4;
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const int button_height = height / 4;
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axes = glfwGetJoystickAxes(joysticks[index], &axis_count);
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if (axis_count)
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{
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const int axis_width = width / axis_count;
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for (i = 0; i < axis_count; i++)
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{
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float value = axes[i] / 2.f + 0.5f;
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glColor3f(0.3f, 0.3f, 0.3f);
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glRecti(x + i * axis_width,
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y,
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x + (i + 1) * axis_width,
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y + axis_height);
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glColor3f(1.f, 1.f, 1.f);
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glRecti(x + i * axis_width,
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y + (int) (value * (axis_height - 5)),
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x + (i + 1) * axis_width,
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y + 5 + (int) (value * (axis_height - 5)));
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}
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}
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buttons = glfwGetJoystickButtons(joysticks[index], &button_count);
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if (button_count)
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{
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const int button_width = width / button_count;
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for (i = 0; i < button_count; i++)
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{
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if (buttons[i])
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glColor3f(1.f, 1.f, 1.f);
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else
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glColor3f(0.3f, 0.3f, 0.3f);
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glRecti(x + i * button_width,
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y + axis_height,
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x + (i + 1) * button_width,
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y + axis_height + button_height);
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}
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}
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}
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static void draw_joysticks(GLFWwindow* window)
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{
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int i, width, height, offset = 0;
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glfwGetFramebufferSize(window, &width, &height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0.f, width, height, 0.f, 1.f, -1.f);
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glMatrixMode(GL_MODELVIEW);
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for (i = 0; i < joystick_count; i++)
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{
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draw_joystick(i,
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0, offset * height / joystick_count,
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width, height / joystick_count);
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offset++;
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}
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}
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static void joystick_callback(int joy, int event)
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{
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if (event == GLFW_CONNECTED)
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{
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int axis_count, button_count;
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glfwGetJoystickAxes(joy, &axis_count);
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glfwGetJoystickButtons(joy, &button_count);
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printf("Found joystick %i named \'%s\' with %i axes, %i buttons\n",
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joy + 1,
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glfwGetJoystickName(joy),
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axis_count,
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button_count);
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joysticks[joystick_count++] = joy;
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}
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else if (event == GLFW_DISCONNECTED)
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{
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int i;
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for (i = 0; i < joystick_count; i++)
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{
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if (joysticks[i] == joy)
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break;
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}
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for (i = i + 1; i < joystick_count; i++)
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joysticks[i - 1] = joysticks[i];
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printf("Lost joystick %i\n", joy + 1);
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joystick_count--;
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}
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}
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static void find_joysticks(void)
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{
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int joy;
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for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++)
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{
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if (glfwJoystickPresent(joy))
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joystick_callback(joy, GLFW_CONNECTED);
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}
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}
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int main(void)
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{
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GLFWwindow* window;
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memset(joysticks, 0, sizeof(joysticks));
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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find_joysticks();
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glfwSetJoystickCallback(joystick_callback);
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window = glfwCreateWindow(640, 480, "Joystick Test", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwMakeContextCurrent(window);
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gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
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glfwSwapInterval(1);
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while (!glfwWindowShouldClose(window))
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{
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glClear(GL_COLOR_BUFFER_BIT);
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draw_joysticks(window);
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glfwSwapBuffers(window);
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glfwPollEvents();
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// Workaround for an issue with msvcrt and mintty
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fflush(stdout);
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}
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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