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SameBoy/SDL/gui.c

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#include <SDL2/SDL.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "utils.h"
#include "gui.h"
#include "font.h"
static const SDL_Color gui_palette[4] = {{8, 24, 16,}, {57, 97, 57,}, {132, 165, 99}, {198, 222, 140}};
static uint32_t gui_palette_native[4];
SDL_Window *window = NULL;
SDL_Renderer *renderer = NULL;
SDL_Texture *texture = NULL;
SDL_PixelFormat *pixel_format = NULL;
enum pending_command pending_command;
unsigned command_parameter;
#ifdef __APPLE__
#define MODIFIER_NAME " " CMD_STRING
#else
#define MODIFIER_NAME CTRL_STRING
#endif
shader_t shader;
SDL_Rect rect;
void render_texture(void *pixels, void *previous)
{
if (renderer) {
if (pixels) {
SDL_UpdateTexture(texture, NULL, pixels, 160 * sizeof (uint32_t));
}
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
}
else {
static void *_pixels = NULL;
if (pixels) {
_pixels = pixels;
}
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
render_bitmap_with_shader(&shader, _pixels, previous, rect.x, rect.y, rect.w, rect.h);
SDL_GL_SwapWindow(window);
}
}
configuration_t configuration =
{
.keys = {
SDL_SCANCODE_RIGHT,
SDL_SCANCODE_LEFT,
SDL_SCANCODE_UP,
SDL_SCANCODE_DOWN,
SDL_SCANCODE_X,
SDL_SCANCODE_Z,
SDL_SCANCODE_BACKSPACE,
SDL_SCANCODE_RETURN,
SDL_SCANCODE_SPACE
},
.color_correction_mode = GB_COLOR_CORRECTION_EMULATE_HARDWARE,
.highpass_mode = GB_HIGHPASS_ACCURATE,
.scaling_mode = GB_SDL_SCALING_INTEGER_FACTOR,
.blend_frames = true,
.model = MODEL_CGB
};
static const char *help[] ={
"Drop a GB or GBC ROM\n"
"file to play.\n"
"\n"
"Keyboard Shortcuts:\n"
" Open Menu: Escape\n"
" Reset: " MODIFIER_NAME "+R\n"
" Pause: " MODIFIER_NAME "+P\n"
" Save state: " MODIFIER_NAME "+(0-9)\n"
" Load state: " MODIFIER_NAME "+" SHIFT_STRING "+(0-9)\n"
" Toggle Fullscreen " MODIFIER_NAME "+F\n"
#ifdef __APPLE__
" Mute/Unmute: " MODIFIER_NAME "+" SHIFT_STRING "+M\n"
#else
" Mute/Unmute: " MODIFIER_NAME "+M\n"
#endif
" Break Debugger: " CTRL_STRING "+C"
};
void update_viewport(void)
{
int win_width, win_height;
SDL_GL_GetDrawableSize(window, &win_width, &win_height);
double x_factor = win_width / 160.0;
double y_factor = win_height / 144.0;
if (configuration.scaling_mode == GB_SDL_SCALING_INTEGER_FACTOR) {
x_factor = (int)(x_factor);
y_factor = (int)(y_factor);
}
if (configuration.scaling_mode != GB_SDL_SCALING_ENTIRE_WINDOW) {
if (x_factor > y_factor) {
x_factor = y_factor;
}
else {
y_factor = x_factor;
}
}
unsigned new_width = x_factor * 160;
unsigned new_height = y_factor * 144;
rect = (SDL_Rect){(win_width - new_width) / 2, (win_height - new_height) /2,
new_width, new_height};
if (renderer) {
SDL_RenderSetViewport(renderer, &rect);
}
else {
glViewport(rect.x, rect.y, rect.w, rect.h);
}
}
/* Does NOT check for bounds! */
static void draw_char(uint32_t *buffer, unsigned char ch, uint32_t color)
{
if (ch < ' ' || ch > font_max) {
ch = '?';
}
uint8_t *data = &font[(ch - ' ') * GLYPH_WIDTH * GLYPH_HEIGHT];
for (unsigned y = GLYPH_HEIGHT; y--;) {
for (unsigned x = GLYPH_WIDTH; x--;) {
if (*(data++)) {
(*buffer) = color;
}
buffer++;
}
buffer += 160 - GLYPH_WIDTH;
}
}
static void draw_unbordered_text(uint32_t *buffer, unsigned x, unsigned y, const char *string, uint32_t color)
{
unsigned orig_x = x;
while (*string) {
if (*string == '\n') {
x = orig_x;
y += GLYPH_HEIGHT + 4;
string++;
continue;
}
if (x > 160 - GLYPH_WIDTH || y == 0 || y > 144 - GLYPH_HEIGHT) {
break;
}
draw_char(&buffer[x + 160 * y], *string, color);
x += GLYPH_WIDTH;
string++;
}
}
static void draw_text(uint32_t *buffer, unsigned x, unsigned y, const char *string, uint32_t color, uint32_t border)
{
draw_unbordered_text(buffer, x - 1, y, string, border);
draw_unbordered_text(buffer, x + 1, y, string, border);
draw_unbordered_text(buffer, x, y - 1, string, border);
draw_unbordered_text(buffer, x, y + 1, string, border);
draw_unbordered_text(buffer, x, y, string, color);
}
enum decoration {
DECORATION_NONE,
DECORATION_SELECTION,
DECORATION_ARROWS,
};
static void draw_text_centered(uint32_t *buffer, unsigned y, const char *string, uint32_t color, uint32_t border, enum decoration decoration)
{
unsigned x = 160 / 2 - (unsigned) strlen(string) * GLYPH_WIDTH / 2;
draw_text(buffer, x, y, string, color, border);
switch (decoration) {
case DECORATION_SELECTION:
draw_text(buffer, x - GLYPH_WIDTH, y, SELECTION_STRING, color, border);
break;
case DECORATION_ARROWS:
draw_text(buffer, x - GLYPH_WIDTH, y, LEFT_ARROW_STRING, color, border);
draw_text(buffer, 160 - x, y, RIGHT_ARROW_STRING, color, border);
break;
case DECORATION_NONE:
break;
}
}
struct menu_item {
const char *string;
void (*handler)(unsigned);
const char *(*value_getter)(unsigned);
void (*backwards_handler)(unsigned);
};
static const struct menu_item *current_menu = NULL;
static const struct menu_item *root_menu = NULL;
static unsigned current_selection = 0;
static enum {
SHOWING_DROP_MESSAGE,
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;
}
static unsigned current_help_page = 0;
static void item_help(unsigned index)
{
current_help_page = 0;
gui_state = SHOWING_HELP;
}
static void enter_emulation_menu(unsigned index);
static void enter_graphics_menu(unsigned index);
static void enter_controls_menu(unsigned index);
static void enter_joypad_menu(unsigned index);
static void enter_audio_menu(unsigned index);
static const struct menu_item paused_menu[] = {
{"Resume", NULL},
{"Emulation Options", enter_emulation_menu},
{"Graphic Options", enter_graphics_menu},
{"Audio Options", enter_audio_menu},
{"Keyboard", enter_controls_menu},
{"Joypad", enter_joypad_menu},
{"Help", item_help},
{"Quit SameBoy", item_exit},
{NULL,}
};
static const struct menu_item *const nonpaused_menu = &paused_menu[1];
static void return_to_root_menu(unsigned index)
{
current_menu = root_menu;
current_selection = 0;
}
static void cycle_model(unsigned index)
{
configuration.model++;
if (configuration.model == MODEL_MAX) {
configuration.model = 0;
}
pending_command = GB_SDL_RESET_COMMAND;
}
static void cycle_model_backwards(unsigned index)
{
if (configuration.model == 0) {
configuration.model = MODEL_MAX;
}
configuration.model--;
pending_command = GB_SDL_RESET_COMMAND;
}
const char *current_model_string(unsigned index)
{
return (const char *[]){"Game Boy", "Game Boy Color", "Game Boy Advance"}
[configuration.model];
}
static const struct menu_item emulation_menu[] = {
{"Emulated Model:", cycle_model, current_model_string, cycle_model_backwards},
{"Back", return_to_root_menu},
{NULL,}
};
static void enter_emulation_menu(unsigned index)
{
current_menu = emulation_menu;
current_selection = 0;
}
const char *current_scaling_mode(unsigned index)
{
return (const char *[]){"Fill Entire Window", "Retain Aspect Ratio", "Retain Integer Factor"}
[configuration.scaling_mode];
}
const char *current_color_correction_mode(unsigned index)
{
return (const char *[]){"Disabled", "Correct Color Curves", "Emulate Hardware", "Preserve Brightness"}
[configuration.color_correction_mode];
}
void cycle_scaling(unsigned index)
{
configuration.scaling_mode++;
if (configuration.scaling_mode == GB_SDL_SCALING_MAX) {
configuration.scaling_mode = 0;
}
update_viewport();
render_texture(NULL, NULL);
}
void cycle_scaling_backwards(unsigned index)
{
if (configuration.scaling_mode == 0) {
configuration.scaling_mode = GB_SDL_SCALING_MAX - 1;
}
else {
configuration.scaling_mode--;
}
update_viewport();
render_texture(NULL, NULL);
}
static void cycle_color_correction(unsigned index)
{
if (configuration.color_correction_mode == GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS) {
configuration.color_correction_mode = GB_COLOR_CORRECTION_DISABLED;
}
else {
configuration.color_correction_mode++;
}
}
static void cycle_color_correction_backwards(unsigned index)
{
if (configuration.color_correction_mode == GB_COLOR_CORRECTION_DISABLED) {
configuration.color_correction_mode = GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS;
}
else {
configuration.color_correction_mode--;
}
}
struct shader_name {
const char *file_name;
const char *display_name;
} shaders[] =
{
{"NearestNeighbor", "Nearest Neighbor"},
{"Bilinear", "Bilinear"},
{"SmoothBilinear", "Smooth Bilinear"},
{"LCD", "LCD Display"},
{"DMG", "DMG Display"},
{"Scale2x", "Scale2x"},
{"Scale4x", "Scale4x"},
{"AAScale2x", "Anti-aliased Scale2x"},
{"AAScale4x", "Anti-aliased Scale4x"},
{"HQ2x", "HQ2x"},
{"OmniScale", "OmniScale"},
{"OmniScaleLegacy", "OmniScale Legacy"},
{"AAOmniScaleLegacy", "AA OmniScale Legacy"},
};
static void cycle_filter(unsigned index)
{
unsigned i = 0;
for (; i < sizeof(shaders) / sizeof(shaders[0]); i++) {
if (strcmp(shaders[i].file_name, configuration.filter) == 0) {
break;
}
}
i += 1;
if (i >= sizeof(shaders) / sizeof(shaders[0])) {
i -= sizeof(shaders) / sizeof(shaders[0]);
}
strcpy(configuration.filter, shaders[i].file_name);
free_shader(&shader);
if (!init_shader_with_name(&shader, configuration.filter)) {
init_shader_with_name(&shader, "NearestNeighbor");
}
}
static void cycle_filter_backwards(unsigned index)
{
unsigned i = 0;
for (; i < sizeof(shaders) / sizeof(shaders[0]); i++) {
if (strcmp(shaders[i].file_name, configuration.filter) == 0) {
break;
}
}
i -= 1;
if (i >= sizeof(shaders) / sizeof(shaders[0])) {
i = sizeof(shaders) / sizeof(shaders[0]) - 1;
}
strcpy(configuration.filter, shaders[i].file_name);
free_shader(&shader);
if (!init_shader_with_name(&shader, configuration.filter)) {
init_shader_with_name(&shader, "NearestNeighbor");
}
}
const char *current_filter_name(unsigned index)
{
unsigned i = 0;
for (; i < sizeof(shaders) / sizeof(shaders[0]); i++) {
if (strcmp(shaders[i].file_name, configuration.filter) == 0) {
break;
}
}
if (i == sizeof(shaders) / sizeof(shaders[0])) {
i = 0;
}
return shaders[i].display_name;
}
static void toggle_blend_frames(unsigned index)
{
configuration.blend_frames ^= true;
}
const char *blend_frames_string(unsigned index)
{
return configuration.blend_frames? "Enabled" : "Disabled";
}
static const struct menu_item graphics_menu[] = {
{"Scaling Mode:", cycle_scaling, current_scaling_mode, cycle_scaling_backwards},
{"Scaling Filter:", cycle_filter, current_filter_name, cycle_filter_backwards},
{"Color Correction:", cycle_color_correction, current_color_correction_mode, cycle_color_correction_backwards},
{"Blend Frames:", toggle_blend_frames, blend_frames_string, toggle_blend_frames},
{"Back", return_to_root_menu},
{NULL,}
};
static void enter_graphics_menu(unsigned index)
{
current_menu = graphics_menu;
current_selection = 0;
}
const char *highpass_filter_string(unsigned index)
{
return (const char *[]){"None (Keep DC Offset)", "Accurate", "Preserve Waveform"}
[configuration.highpass_mode];
}
void cycle_highpass_filter(unsigned index)
{
configuration.highpass_mode++;
if (configuration.highpass_mode == GB_HIGHPASS_MAX) {
configuration.highpass_mode = 0;
}
}
void cycle_highpass_filter_backwards(unsigned index)
{
if (configuration.highpass_mode == 0) {
configuration.highpass_mode = GB_HIGHPASS_MAX - 1;
}
else {
configuration.highpass_mode--;
}
}
static const struct menu_item audio_menu[] = {
{"Highpass Filter:", cycle_highpass_filter, highpass_filter_string, cycle_highpass_filter_backwards},
{"Back", return_to_root_menu},
{NULL,}
};
static void enter_audio_menu(unsigned index)
{
current_menu = audio_menu;
current_selection = 0;
}
static const char *key_name(unsigned index)
{
return SDL_GetScancodeName(configuration.keys[index]);
}
static void modify_key(unsigned index)
{
gui_state = WAITING_FOR_KEY;
}
static const struct menu_item controls_menu[] = {
{"Right:", modify_key, key_name,},
{"Left:", modify_key, key_name,},
{"Up:", modify_key, key_name,},
{"Down:", modify_key, key_name,},
{"A:", modify_key, key_name,},
{"B:", modify_key, key_name,},
{"Select:", modify_key, key_name,},
{"Start:", modify_key, key_name,},
{"Turbo:", modify_key, key_name,},
{"Back", return_to_root_menu},
{NULL,}
};
static void enter_controls_menu(unsigned index)
{
current_menu = controls_menu;
current_selection = 0;
}
static unsigned joypad_index = 0;
SDL_Joystick *joystick = NULL;
SDL_GameController *controller = 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 (controller) {
SDL_GameControllerClose(controller);
controller = NULL;
}
else if (joystick) {
SDL_JoystickClose(joystick);
joystick = NULL;
}
if ((controller = SDL_GameControllerOpen(joypad_index))){
joystick = SDL_GameControllerGetJoystick(controller);
}
else {
joystick = SDL_JoystickOpen(joypad_index);
}
}
static void cycle_joypads_backwards(unsigned index)
{
joypad_index++;
if (joypad_index >= SDL_NumJoysticks()) {
joypad_index = SDL_NumJoysticks() - 1;
}
if (controller) {
SDL_GameControllerClose(controller);
controller = NULL;
}
else if (joystick) {
SDL_JoystickClose(joystick);
joystick = NULL;
}
if ((controller = SDL_GameControllerOpen(joypad_index))){
joystick = SDL_GameControllerGetJoystick(controller);
}
else {
joystick = SDL_JoystickOpen(joypad_index);
}
}
unsigned fix_joypad_axis(unsigned axis)
{
if (controller) {
/* Convert to the mapping used by generic Xbox-style controllers */
for (SDL_GameControllerAxis i = 0; i < SDL_CONTROLLER_AXIS_MAX; i++) {
if (SDL_GameControllerGetBindForAxis(controller, i).value.axis == axis) {
if (i == SDL_CONTROLLER_AXIS_LEFTX || i == SDL_CONTROLLER_AXIS_RIGHTX) return 0;
if (i == SDL_CONTROLLER_AXIS_LEFTY || i == SDL_CONTROLLER_AXIS_RIGHTY) return 1;
return i;
}
}
return -1;
}
if (configuration.div_joystick) {
axis >>= 1;
}
return axis & 1;
}
unsigned fix_joypad_button(unsigned button)
{
if (controller) {
/* Convert to the mapping used by generic Xbox-style controllers */
for (SDL_GameControllerButton i = 0; i < SDL_CONTROLLER_BUTTON_MAX; i++) {
if (SDL_GameControllerGetBindForButton(controller, i).value.button == button) {
if (i == SDL_CONTROLLER_BUTTON_START) {
return 9;
}
if (i == 9) {
return SDL_CONTROLLER_BUTTON_START;
}
if (i == SDL_CONTROLLER_BUTTON_BACK) {
return 8;
}
if (i == 8) {
return SDL_CONTROLLER_BUTTON_BACK;
}
return i;
}
}
return -1;
}
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 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},
{"Back", return_to_root_menu},
{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)
{
if (joystick && !SDL_NumJoysticks()) {
if (controller) {
SDL_GameControllerClose(controller);
controller = NULL;
joystick = NULL;
}
else {
SDL_JoystickClose(joystick);
joystick = NULL;
}
}
else if (!joystick && SDL_NumJoysticks()) {
if ((controller = SDL_GameControllerOpen(0))){
joystick = SDL_GameControllerGetJoystick(controller);
}
else {
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"));
SDL_SetPaletteColors(background->format->palette, gui_palette, 0, 4);
converted_background = SDL_ConvertSurface(background, pixel_format, 0);
SDL_LockSurface(converted_background);
SDL_FreeSurface(background);
for (unsigned i = 4; i--; ) {
gui_palette_native[i] = SDL_MapRGB(pixel_format, gui_palette[i].r, gui_palette[i].g, gui_palette[i].b);
}
}
uint32_t pixels[160 * 144];
SDL_Event event = {0,};
gui_state = is_running? SHOWING_MENU : SHOWING_DROP_MESSAGE;
bool should_render = true;
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;
}
else if (event.jbutton.button == SDL_CONTROLLER_BUTTON_DPAD_UP) event.key.keysym.scancode = SDL_SCANCODE_UP;
else if (event.jbutton.button == SDL_CONTROLLER_BUTTON_DPAD_DOWN) event.key.keysym.scancode = SDL_SCANCODE_DOWN;
else if (event.jbutton.button == SDL_CONTROLLER_BUTTON_DPAD_LEFT) event.key.keysym.scancode = SDL_SCANCODE_LEFT;
else if (event.jbutton.button == SDL_CONTROLLER_BUTTON_DPAD_RIGHT) event.key.keysym.scancode = SDL_SCANCODE_RIGHT;
break;
case SDL_JOYHATMOTION: {
uint8_t value = event.jhat.value;
if (value != 0) {
uint32_t scancode =
value == SDL_HAT_UP ? SDL_SCANCODE_UP
: value == SDL_HAT_DOWN ? SDL_SCANCODE_DOWN
: value == SDL_HAT_LEFT ? SDL_SCANCODE_LEFT
: value == SDL_HAT_RIGHT ? SDL_SCANCODE_RIGHT
: 0;
if (scancode != 0) {
event.type = SDL_KEYDOWN;
event.key.keysym.scancode = scancode;
}
}
}
case SDL_JOYAXISMOTION: {
static bool axis_active[2] = {false, false};
event.jaxis.axis = fix_joypad_axis(event.jaxis.axis);
if (event.jaxis.axis == 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.axis == 0) {
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) {
exit(0);
}
else {
pending_command = GB_SDL_QUIT_COMMAND;
return;
}
}
case SDL_WINDOWEVENT: {
if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
update_viewport();
render_texture(NULL, NULL);
}
break;
}
case SDL_DROPFILE: {
set_filename(event.drop.file, true);
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) {
return;
}
else {
if (gui_state == SHOWING_DROP_MESSAGE) {
gui_state = SHOWING_MENU;
}
else if (gui_state == SHOWING_MENU) {
gui_state = SHOWING_DROP_MESSAGE;
}
current_selection = 0;
current_menu = root_menu;
should_render = true;
}
}
if (gui_state == SHOWING_MENU) {
if (event.key.keysym.scancode == SDL_SCANCODE_DOWN && current_menu[current_selection + 1].string) {
current_selection++;
should_render = true;
}
else if (event.key.keysym.scancode == SDL_SCANCODE_UP && current_selection) {
current_selection--;
should_render = true;
}
else if (event.key.keysym.scancode == SDL_SCANCODE_RETURN && !current_menu[current_selection].backwards_handler) {
if (current_menu[current_selection].handler) {
current_menu[current_selection].handler(current_selection);
if (pending_command == GB_SDL_RESET_COMMAND && !is_running) {
pending_command = GB_SDL_NO_COMMAND;
}
if (pending_command) {
if (!is_running && pending_command == GB_SDL_QUIT_COMMAND) {
exit(0);
}
return;
}
should_render = true;
}
else {
return;
}
}
else if (event.key.keysym.scancode == SDL_SCANCODE_RIGHT && current_menu[current_selection].backwards_handler) {
current_menu[current_selection].handler(current_selection);
should_render = true;
}
else if (event.key.keysym.scancode == SDL_SCANCODE_LEFT && current_menu[current_selection].backwards_handler) {
current_menu[current_selection].backwards_handler(current_selection);
should_render = true;
}
}
else if (gui_state == SHOWING_HELP) {
current_help_page++;
if (current_help_page == sizeof(help) / sizeof(help[0])) {
gui_state = SHOWING_MENU;
}
should_render = true;
}
else if (gui_state == WAITING_FOR_KEY) {
configuration.keys[current_selection] = event.key.keysym.scancode;
gui_state = SHOWING_MENU;
should_render = true;
}
break;
}
if (should_render) {
should_render = false;
memcpy(pixels, converted_background->pixels, sizeof(pixels));
switch (gui_state) {
case SHOWING_DROP_MESSAGE:
draw_text_centered(pixels, 8, "Press ESC for menu", gui_palette_native[3], gui_palette_native[0], false);
draw_text_centered(pixels, 116, "Drop a GB or GBC", gui_palette_native[3], gui_palette_native[0], false);
draw_text_centered(pixels, 128, "file to play", gui_palette_native[3], gui_palette_native[0], false);
break;
case SHOWING_MENU:
draw_text_centered(pixels, 8, "SameBoy", gui_palette_native[3], gui_palette_native[0], false);
unsigned i = 0, y = 24;
for (const struct menu_item *item = current_menu; item->string; item++, i++) {
if (item->value_getter && !item->backwards_handler) {
char line[25];
snprintf(line, sizeof(line), "%s%*s", item->string, 24 - (int)strlen(item->string), item->value_getter(i));
draw_text_centered(pixels, y, line, gui_palette_native[3], gui_palette_native[0],
i == current_selection ? DECORATION_SELECTION : DECORATION_NONE);
y += 12;
}
else {
draw_text_centered(pixels, y, item->string, gui_palette_native[3], gui_palette_native[0],
i == current_selection && !item->value_getter ? DECORATION_SELECTION : DECORATION_NONE);
y += 12;
if (item->value_getter) {
draw_text_centered(pixels, y, item->value_getter(i), gui_palette_native[3], gui_palette_native[0],
i == current_selection ? DECORATION_ARROWS : DECORATION_NONE);
y += 12;
}
}
}
break;
case SHOWING_HELP:
draw_text(pixels, 2, 2, help[current_help_page], gui_palette_native[3], gui_palette_native[0]);
break;
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;
}
render_texture(pixels, NULL);
}
} while (SDL_WaitEvent(&event));
}
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