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Basic Joypad support

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This commit is contained in:
Lior Halphon 2017-12-23 00:39:04 +02:00
parent 3f9d62ceee
commit c03ccba8db
3 changed files with 238 additions and 4 deletions
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201
SDL/gui.c
View File

@ -174,8 +174,12 @@ static enum {
SHOWING_MENU,
SHOWING_HELP,
WAITING_FOR_KEY,
WAITING_FOR_JBUTTON,
} gui_state;
unsigned auto_detect_progress = 0;
unsigned auto_detect_inputs[3];
static void item_exit(unsigned index)
{
pending_command = GB_SDL_QUIT_COMMAND;
@ -190,11 +194,13 @@ static void item_help(unsigned index)
static void enter_graphics_menu(unsigned index);
static void enter_controls_menu(unsigned index);
static void enter_joypad_menu(unsigned index);
static const struct menu_item paused_menu[] = {
{"Resume", NULL},
{"Graphic Options", enter_graphics_menu},
{"Controls", enter_controls_menu},
{"Keyboard", enter_controls_menu},
{"Joypad", enter_joypad_menu},
{"Help", item_help},
{"Exit", item_exit},
{NULL,}
@ -202,7 +208,8 @@ static const struct menu_item paused_menu[] = {
static const struct menu_item nonpaused_menu[] = {
{"Graphic Options", enter_graphics_menu},
{"Controls", enter_controls_menu},
{"Keyboard", enter_controls_menu},
{"Joypad", enter_joypad_menu},
{"Help", item_help},
{"Exit", item_exit},
{NULL,}
@ -316,10 +323,102 @@ static void enter_controls_menu(unsigned index)
current_selection = 0;
}
static unsigned joypad_index = 0;
SDL_Joystick *joystick = NULL;
const char *current_joypad_name(unsigned index)
{
static char name[23] = {0,};
const char *orig_name = joystick? SDL_JoystickName(joystick) : NULL;
if (!orig_name) return "Not Found";
unsigned i = 0;
// SDL returns a name with repeated and trailing spaces
while (*orig_name && i < sizeof(name) - 2) {
if (orig_name[0] != ' ' || orig_name[1] != ' ') {
name[i++] = *orig_name;
}
orig_name++;
}
if (i && name[i - 1] == ' ') {
i--;
}
name[i] = 0;
return name;
}
static void cycle_joypads(unsigned index)
{
joypad_index++;
if (joypad_index >= SDL_NumJoysticks()) {
joypad_index = 0;
}
if (joystick) {
SDL_JoystickClose(joystick);
}
joystick = SDL_JoystickOpen(joypad_index);
}
unsigned fix_joypad_button(unsigned button)
{
if (configuration.div_joystick) {
button >>= 1;
}
if (button < 4) {
if (configuration.swap_joysticks_bits_1_and_2) {
button = (int[]){0, 2, 1, 3}[button];
}
if (configuration.flip_joystick_bit_1) {
button ^= 1;
}
}
return button;
}
static void cycle_joypads_backwards(unsigned index)
{
joypad_index++;
if (joypad_index >= SDL_NumJoysticks()) {
joypad_index = SDL_NumJoysticks() - 1;
}
if (joystick) {
SDL_JoystickClose(joystick);
}
joystick = SDL_JoystickOpen(joypad_index);
}
static void detect_joypad_layout(unsigned index)
{
gui_state = WAITING_FOR_JBUTTON;
auto_detect_progress = 0;
}
static const struct menu_item joypad_menu[] = {
{"Joypad:", cycle_joypads, current_joypad_name, cycle_joypads_backwards},
{"Detect layout", detect_joypad_layout},
{NULL,}
};
static void enter_joypad_menu(unsigned index)
{
current_menu = joypad_menu;
current_selection = 0;
}
extern void set_filename(const char *new_filename, bool new_should_free);
void run_gui(bool is_running)
{
/* Draw the "Drop file" screen */
if (joystick && !SDL_NumJoysticks()) {
SDL_JoystickClose(joystick);
joystick = NULL;
}
else if (!joystick && SDL_NumJoysticks()) {
joystick = SDL_JoystickOpen(0);
}
/* Draw the background screen */
static SDL_Surface *converted_background = NULL;
if (!converted_background) {
SDL_Surface *background = SDL_LoadBMP(executable_relative_path("background.bmp"));
@ -340,6 +439,63 @@ void run_gui(bool is_running)
current_menu = root_menu = is_running? paused_menu : nonpaused_menu;
current_selection = 0;
do {
/* Convert Joypad events (We only generate down events) */
if (gui_state != WAITING_FOR_KEY && gui_state != WAITING_FOR_JBUTTON) {
switch (event.type) {
case SDL_JOYBUTTONDOWN:
event.type = SDL_KEYDOWN;
event.jbutton.button = fix_joypad_button(event.jbutton.button);
if (event.jbutton.button < 4) {
event.key.keysym.scancode = (event.jbutton.button & 1) ? SDL_SCANCODE_RETURN : SDL_SCANCODE_ESCAPE;
}
else if (event.jbutton.button == 8 || event.jbutton.button == 9) {
event.key.keysym.scancode = SDL_SCANCODE_ESCAPE;
}
break;
case SDL_JOYAXISMOTION: {
static bool axis_active[2] = {false, false};
if ((event.jaxis.axis >> configuration.div_joystick) & 1) {
if (event.jaxis.value > 0x4000) {
if (!axis_active[1]) {
event.type = SDL_KEYDOWN;
event.key.keysym.scancode = SDL_SCANCODE_DOWN;
}
axis_active[1] = true;
}
else if (event.jaxis.value < -0x4000) {
if (!axis_active[0]) {
event.type = SDL_KEYDOWN;
event.key.keysym.scancode = SDL_SCANCODE_UP;
}
axis_active[1] = true;
}
else {
axis_active[1] = false;
}
}
else {
if (event.jaxis.value > 0x4000) {
if (!axis_active[0]) {
event.type = SDL_KEYDOWN;
event.key.keysym.scancode = SDL_SCANCODE_RIGHT;
}
axis_active[0] = true;
}
else if (event.jaxis.value < -0x4000) {
if (!axis_active[0]) {
event.type = SDL_KEYDOWN;
event.key.keysym.scancode = SDL_SCANCODE_LEFT;
}
axis_active[0] = true;
}
else {
axis_active[0] = false;
}
}
}
}
}
switch (event.type) {
case SDL_QUIT: {
if (!is_running) {
@ -365,6 +521,36 @@ void run_gui(bool is_running)
pending_command = GB_SDL_NEW_FILE_COMMAND;
return;
}
case SDL_JOYBUTTONDOWN:
{
if (gui_state == WAITING_FOR_JBUTTON) {
should_render = true;
auto_detect_inputs[auto_detect_progress++] = event.jbutton.button;
if (auto_detect_progress == 3) {
gui_state = SHOWING_MENU;
configuration.div_joystick =
((auto_detect_inputs[0] | auto_detect_inputs[1] | auto_detect_inputs[2]) & 1) == 0 &&
auto_detect_inputs[0] > 9;
if (configuration.div_joystick) {
auto_detect_inputs[0] >>= 1;
auto_detect_inputs[1] >>= 1;
auto_detect_inputs[2] >>= 1;
}
configuration.swap_joysticks_bits_1_and_2 =
(auto_detect_inputs[1] & 1) == (auto_detect_inputs[2] & 1);
if (configuration.swap_joysticks_bits_1_and_2) {
auto_detect_inputs[1] = (int[]){0, 2, 1, 3}[auto_detect_inputs[1]];
auto_detect_inputs[2] = (int[]){0, 2, 1, 3}[auto_detect_inputs[2]];
}
configuration.flip_joystick_bit_1 = auto_detect_inputs[2] & 1;
}
}
}
case SDL_KEYDOWN:
if (event.key.keysym.scancode == SDL_SCANCODE_ESCAPE) {
if (is_running) {
@ -470,6 +656,15 @@ void run_gui(bool is_running)
case WAITING_FOR_KEY:
draw_text_centered(pixels, 68, "Press a Key", gui_palette_native[3], gui_palette_native[0], DECORATION_NONE);
break;
case WAITING_FOR_JBUTTON:
draw_text_centered(pixels, 68, (const char *[])
{
"Press button for Start",
"Press button for A",
"Press button for B",
} [auto_detect_progress],
gui_palette_native[3], gui_palette_native[0], DECORATION_NONE);
break;
}
SDL_UpdateTexture(texture, NULL, pixels, 160 * sizeof (uint32_t));

7
SDL/gui.h
View File

@ -33,11 +33,16 @@ typedef struct {
SDL_Scancode keys[9];
GB_color_correction_mode_t color_correction_mode;
enum scaling_mode scaling_mode;
bool div_joystick;
bool flip_joystick_bit_1;
bool swap_joysticks_bits_1_and_2;
} configuration_t;
extern configuration_t configuration;
void update_viewport(void);
void run_gui(bool is_running);
unsigned fix_joypad_button(unsigned button);
#endif

34
SDL/main.c
View File

@ -96,8 +96,42 @@ static void handle_events(GB_gameboy_t *gb)
if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
update_viewport();
}
break;
}
case SDL_JOYBUTTONUP:
case SDL_JOYBUTTONDOWN:
event.jbutton.button = fix_joypad_button(event.jbutton.button);
if (event.jbutton.button < 4) {
GB_set_key_state(gb, (event.jbutton.button & 1) ? GB_KEY_A : GB_KEY_B,
event.type == SDL_JOYBUTTONDOWN);
}
else if (event.jbutton.button == 8) {
GB_set_key_state(gb, GB_KEY_SELECT, event.type == SDL_JOYBUTTONDOWN);
}
else if (event.jbutton.button == 9) {
GB_set_key_state(gb, GB_KEY_START, event.type == SDL_JOYBUTTONDOWN);
}
else if (event.jbutton.button & 1) {
GB_set_turbo_mode(gb, event.type == SDL_JOYBUTTONDOWN, false);
}
else {
run_gui(true);
GB_set_color_correction_mode(gb, configuration.color_correction_mode);
}
break;
case SDL_JOYAXISMOTION:
if ((event.jaxis.axis >> configuration.div_joystick) & 1) {
GB_set_key_state(gb, GB_KEY_DOWN, event.jaxis.value > 0x4000);
GB_set_key_state(gb, GB_KEY_UP, event.jaxis.value < -0x4000);
}
else {
GB_set_key_state(gb, GB_KEY_RIGHT, event.jaxis.value > 0x4000);
GB_set_key_state(gb, GB_KEY_LEFT, event.jaxis.value < -0x4000);
}
break;
case SDL_KEYDOWN:
switch (event.key.keysym.scancode) {
case SDL_SCANCODE_ESCAPE: