ref: 8d296f03850a2b981a90a6a62bb3663bd9effd4f
dir: /external/glfw/tests/joysticks.c/
//========================================================================
// Joystick input 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 displays the state of every button and axis of every connected
// joystick and/or gamepad
//
//========================================================================
#include <glad/gl.h>
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#define NK_IMPLEMENTATION
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_BUTTON_TRIGGER_ON_RELEASE
#include <nuklear.h>
#define NK_GLFW_GL2_IMPLEMENTATION
#include <nuklear_glfw_gl2.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef _MSC_VER
#define strdup(x) _strdup(x)
#endif
static GLFWwindow* window;
static int joysticks[GLFW_JOYSTICK_LAST + 1];
static int joystick_count = 0;
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void joystick_callback(int jid, int event)
{
if (event == GLFW_CONNECTED)
joysticks[joystick_count++] = jid;
else if (event == GLFW_DISCONNECTED)
{
int i;
for (i = 0; i < joystick_count; i++)
{
if (joysticks[i] == jid)
break;
}
for (i = i + 1; i < joystick_count; i++)
joysticks[i - 1] = joysticks[i];
joystick_count--;
}
if (!glfwGetWindowAttrib(window, GLFW_FOCUSED))
glfwRequestWindowAttention(window);
}
static void drop_callback(GLFWwindow* window, int count, const char* paths[])
{
int i;
for (i = 0; i < count; i++)
{
long size;
char* text;
FILE* stream = fopen(paths[i], "rb");
if (!stream)
continue;
fseek(stream, 0, SEEK_END);
size = ftell(stream);
fseek(stream, 0, SEEK_SET);
text = malloc(size + 1);
text[size] = '\0';
if (fread(text, 1, size, stream) == size)
glfwUpdateGamepadMappings(text);
free(text);
fclose(stream);
}
}
static const char* joystick_label(int jid)
{
static char label[1024];
snprintf(label, sizeof(label), "%i: %s", jid + 1, glfwGetJoystickName(jid));
return label;
}
static void hat_widget(struct nk_context* nk, unsigned char state)
{
float radius;
struct nk_rect area;
struct nk_vec2 center;
if (nk_widget(&area, nk) == NK_WIDGET_INVALID)
return;
center = nk_vec2(area.x + area.w / 2.f, area.y + area.h / 2.f);
radius = NK_MIN(area.w, area.h) / 2.f;
nk_stroke_circle(nk_window_get_canvas(nk),
nk_rect(center.x - radius,
center.y - radius,
radius * 2.f,
radius * 2.f),
1.f,
nk_rgb(175, 175, 175));
if (state)
{
const float angles[] =
{
0.f, 0.f,
NK_PI * 1.5f, NK_PI * 1.75f,
NK_PI, 0.f,
NK_PI * 1.25f, 0.f,
NK_PI * 0.5f, NK_PI * 0.25f,
0.f, 0.f,
NK_PI * 0.75f, 0.f,
};
const float cosa = nk_cos(angles[state]);
const float sina = nk_sin(angles[state]);
const struct nk_vec2 p0 = nk_vec2(0.f, -radius);
const struct nk_vec2 p1 = nk_vec2( radius / 2.f, -radius / 3.f);
const struct nk_vec2 p2 = nk_vec2(-radius / 2.f, -radius / 3.f);
nk_fill_triangle(nk_window_get_canvas(nk),
center.x + cosa * p0.x + sina * p0.y,
center.y + cosa * p0.y - sina * p0.x,
center.x + cosa * p1.x + sina * p1.y,
center.y + cosa * p1.y - sina * p1.x,
center.x + cosa * p2.x + sina * p2.y,
center.y + cosa * p2.y - sina * p2.x,
nk_rgb(175, 175, 175));
}
}
int main(void)
{
int jid, hat_buttons = GLFW_FALSE;
struct nk_context* nk;
struct nk_font_atlas* atlas;
memset(joysticks, 0, sizeof(joysticks));
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
window = glfwCreateWindow(800, 600, "Joystick Test", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
gladLoadGL(glfwGetProcAddress);
glfwSwapInterval(1);
nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
nk_glfw3_font_stash_begin(&atlas);
nk_glfw3_font_stash_end();
for (jid = GLFW_JOYSTICK_1; jid <= GLFW_JOYSTICK_LAST; jid++)
{
if (glfwJoystickPresent(jid))
joysticks[joystick_count++] = jid;
}
glfwSetJoystickCallback(joystick_callback);
glfwSetDropCallback(window, drop_callback);
while (!glfwWindowShouldClose(window))
{
int i, width, height;
glfwGetWindowSize(window, &width, &height);
glClear(GL_COLOR_BUFFER_BIT);
nk_glfw3_new_frame();
if (nk_begin(nk,
"Joysticks",
nk_rect(width - 200.f, 0.f, 200.f, (float) height),
NK_WINDOW_MINIMIZABLE |
NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(nk, 30, 1);
nk_checkbox_label(nk, "Hat buttons", &hat_buttons);
if (joystick_count)
{
for (i = 0; i < joystick_count; i++)
{
if (nk_button_label(nk, joystick_label(joysticks[i])))
nk_window_set_focus(nk, joystick_label(joysticks[i]));
}
}
else
nk_label(nk, "No joysticks connected", NK_TEXT_LEFT);
}
nk_end(nk);
for (i = 0; i < joystick_count; i++)
{
if (nk_begin(nk,
joystick_label(joysticks[i]),
nk_rect(i * 20.f, i * 20.f, 550.f, 570.f),
NK_WINDOW_BORDER |
NK_WINDOW_MOVABLE |
NK_WINDOW_SCALABLE |
NK_WINDOW_MINIMIZABLE |
NK_WINDOW_TITLE))
{
int j, axis_count, button_count, hat_count;
const float* axes;
const unsigned char* buttons;
const unsigned char* hats;
GLFWgamepadstate state;
nk_layout_row_dynamic(nk, 30, 1);
nk_labelf(nk, NK_TEXT_LEFT, "Hardware GUID %s",
glfwGetJoystickGUID(joysticks[i]));
nk_label(nk, "Joystick state", NK_TEXT_LEFT);
axes = glfwGetJoystickAxes(joysticks[i], &axis_count);
buttons = glfwGetJoystickButtons(joysticks[i], &button_count);
hats = glfwGetJoystickHats(joysticks[i], &hat_count);
if (!hat_buttons)
button_count -= hat_count * 4;
for (j = 0; j < axis_count; j++)
nk_slide_float(nk, -1.f, axes[j], 1.f, 0.1f);
nk_layout_row_dynamic(nk, 30, 12);
for (j = 0; j < button_count; j++)
{
char name[16];
snprintf(name, sizeof(name), "%i", j + 1);
nk_select_label(nk, name, NK_TEXT_CENTERED, buttons[j]);
}
nk_layout_row_dynamic(nk, 30, 8);
for (j = 0; j < hat_count; j++)
hat_widget(nk, hats[j]);
nk_layout_row_dynamic(nk, 30, 1);
if (glfwGetGamepadState(joysticks[i], &state))
{
int hat = 0;
const char* names[GLFW_GAMEPAD_BUTTON_LAST + 1 - 4] =
{
"A", "B", "X", "Y",
"LB", "RB",
"Back", "Start", "Guide",
"LT", "RT",
};
nk_labelf(nk, NK_TEXT_LEFT,
"Gamepad state: %s",
glfwGetGamepadName(joysticks[i]));
nk_layout_row_dynamic(nk, 30, 2);
for (j = 0; j <= GLFW_GAMEPAD_AXIS_LAST; j++)
nk_slide_float(nk, -1.f, state.axes[j], 1.f, 0.1f);
nk_layout_row_dynamic(nk, 30, GLFW_GAMEPAD_BUTTON_LAST + 1 - 4);
for (j = 0; j <= GLFW_GAMEPAD_BUTTON_LAST - 4; j++)
nk_select_label(nk, names[j], NK_TEXT_CENTERED, state.buttons[j]);
if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_UP])
hat |= GLFW_HAT_UP;
if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_RIGHT])
hat |= GLFW_HAT_RIGHT;
if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_DOWN])
hat |= GLFW_HAT_DOWN;
if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_LEFT])
hat |= GLFW_HAT_LEFT;
nk_layout_row_dynamic(nk, 30, 8);
hat_widget(nk, hat);
}
else
nk_label(nk, "Joystick has no gamepad mapping", NK_TEXT_LEFT);
}
nk_end(nk);
}
nk_glfw3_render(NK_ANTI_ALIASING_ON);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}