launcher: additional UI functionality (scanlines card, host-shortcut chord labels, TurboToggle)

src/common/launcher_binds.c

@@ -202,7 +202,7 @@ static const char* kHotkeyKey[LNG_HK_COUNT] = {
     "WindowBigger", "WindowSmaller", "VolumeUp", "VolumeDown",
     "DisplayPerf", "ToggleRenderer",
     "SolarBrighter", "SolarDimmer", "SolarLive",
-    "Rewind", "SaveStateMenu"
+    "Rewind", "SaveStateMenu", "TurboToggle"
 };
 // Built-in defaults (shown when config.ini has no line; "" = unbound).
 static const char* kHotkeyDef[LNG_HK_COUNT] = {
@@ -211,7 +211,7 @@ static const char* kHotkeyDef[LNG_HK_COUNT] = {
      * (psxrecomp host_keymap reads these from [KeyMap]). */
     "", "", "Keypad +", "Keypad -", "F", "R",
     "", "", "",
-    "F8", "F7"
+    "F8", "F7", "F9"
 };
 
 static void copy_str(char* d, size_t cap, const char* s) {
@@ -410,7 +410,12 @@ static void reload_hotkey_display(LauncherModel* m) {
         char* hash = strchr(v, '#'); if (hash) *hash = 0;
         size_t vl = strlen(v); while (vl && (v[vl-1] == ' ' || v[vl-1] == '\t')) v[--vl] = 0;
         for (int h = 0; h < LNG_HK_COUNT; ++h)
-            if (ieq(p, klen, kHotkeyKey[h])) { copy_str(m->hotkeys[h], sizeof(m->hotkeys[h]), v); break; }
+            if (ieq(p, klen, kHotkeyKey[h])) {
+                const int unbound = !v[0] || ieq(v, strlen(v), "None") ||
+                                    ieq(v, strlen(v), "(unbound)");
+                copy_str(m->hotkeys[h], sizeof(m->hotkeys[h]), unbound ? "(unbound)" : v);
+                break;
+            }
     }
     free(text);
 }
@@ -1450,6 +1455,10 @@ void launcher_binds_set_hotkey(LauncherModel* m, LngHotkey h, int keycode, int k
     if (h < 0 || h >= LNG_HK_COUNT) return;
     char val[64];
     format_hotkey(keycode, kmod, val, sizeof(val));
-    keymap_write(kHotkeyKey[h], val);
+    // keycode 0 = explicit unbind. Write the literal "None" rather than an
+    // empty value: the PSX runtime treats a present-but-empty/None line as
+    // "the user cleared this" and skips its built-in default, whereas a
+    // missing line keeps the default.
+    keymap_write(kHotkeyKey[h], val[0] ? val : "None");
     copy_str(m->hotkeys[h], sizeof(m->hotkeys[h]), val[0] ? val : "(unbound)");
 }

src/common/launcher_model.c

@@ -52,7 +52,7 @@ static const char* kHotkeyNames[LNG_HK_COUNT] = {
     "Window bigger", "Window smaller", "Volume up", "Volume down",
     "FPS readout", "Toggle renderer",
     "Solar level up", "Solar level down", "Resume live solar",
-    "Rewind", "Save states menu"
+    "Rewind", "Save states menu", "Fast-forward toggle"
 };
 static const char* kViewNames[8] = {
     "Dashboard", "Settings", "Controller", "Netplay", "Mods",
@@ -276,6 +276,7 @@ void launcher_model_init(LauncherModel* m,
         m->has_texture_filter   = game->has_texture_filter != 0;
         m->has_fmv_filter       = game->has_fmv_filter != 0;
         m->has_screen_kind      = game->has_screen_kind != 0;
+        m->has_scanlines        = game->has_scanlines != 0;
         m->has_frame_interp     = game->has_frame_interp != 0;
         m->has_spu_hq           = game->has_spu_hq != 0;
         m->has_rewind_depth     = game->has_rewind_depth != 0;
@@ -1668,6 +1669,26 @@ const char* launcher_model_screen_kind_label(const LauncherModel* m) {
     return names[clampi(m->s.screen_kind, 0, n - 1)];
 }
 
+void launcher_model_toggle_scanlines(LauncherModel* m) {
+    if (!m || !m->has_scanlines) return;
+    m->s.scanlines = !m->s.scanlines;
+    /* First time on with no persisted strength: seed the default so the slider
+     * has a value to show (and the effect is visible). */
+    if (m->s.scanlines && m->s.scanline_strength_pct == 0)
+        m->s.scanline_strength_pct = 50;
+}
+
+void launcher_model_set_scanline_strength_pct(LauncherModel* m, int pct) {
+    if (!m || !m->has_scanlines) return;
+    m->s.scanline_strength_pct = clampi(pct, 1, 100);
+}
+
+int launcher_model_scanline_strength_pct(const LauncherModel* m) {
+    if (!m) return 50;
+    int p = m->s.scanline_strength_pct;
+    return (p >= 1 && p <= 100) ? p : 50;   /* 0 = unset -> default 50 */
+}
+
 void launcher_model_toggle_frame_interp(LauncherModel* m) {
     m->s.frame_interp = !m->s.frame_interp;
 }

src/common/launcher_model.h

@@ -103,6 +103,7 @@ typedef enum {
     LNG_HK_SOLAR_BRIGHTER, LNG_HK_SOLAR_DIMMER, LNG_HK_SOLAR_LIVE,
     LNG_HK_REWIND, /* PSX local rewind filmstrip → [KeyMap] Rewind */
     LNG_HK_SAVE_STATE_MENU, /* PSX save-state slot menu → [KeyMap] SaveStateMenu */
+    LNG_HK_TURBO_TOGGLE, /* PSX press-to-latch fast-forward → [KeyMap] TurboToggle */
     LNG_HK_COUNT
 } LngHotkey;
 
@@ -378,6 +379,7 @@ typedef struct {
     bool     has_texture_filter;
     bool     has_fmv_filter;
     bool     has_screen_kind;
+    bool     has_scanlines;      // present-time scanline post-process (PSX)
     bool     has_frame_interp;
     bool     has_spu_hq;
     bool     has_rewind_depth;
@@ -759,6 +761,9 @@ void launcher_model_toggle_perspective_texturing(LauncherModel* m);
 bool launcher_model_geometry_correction_inert(const LauncherModel* m);
 void launcher_model_cycle_screen_kind(LauncherModel* m);       // Raw/CRT/Composite/Trinitron
 const char* launcher_model_screen_kind_label(const LauncherModel* m);
+void launcher_model_toggle_scanlines(LauncherModel* m);
+void launcher_model_set_scanline_strength_pct(LauncherModel* m, int pct); // clamps 1..100
+int  launcher_model_scanline_strength_pct(const LauncherModel* m);        // effective (seeds 50)
 void launcher_model_toggle_frame_interp(LauncherModel* m);
 void launcher_model_cycle_interp_fps(LauncherModel* m);        // {0,90,120,144,165,240} wrap
 const char* launcher_model_interp_fps_label(const LauncherModel* m);  // "Display refresh"/"90 fps"

src/consoles/psx/psx_profile.h

@@ -119,7 +119,8 @@ static const SystemProfile kSystemProfilePsx = {
                                    (1u << LNG_HK_VOLUME_DOWN)    |
                                    (1u << LNG_HK_DISPLAY_PERF)   |
                                    RUI_PSX_REWIND_HOTKEY_MASK    |
-                                   (1u << LNG_HK_SAVE_STATE_MENU)),
+                                   (1u << LNG_HK_SAVE_STATE_MENU) |
+                                   (1u << LNG_HK_TURBO_TOGGLE)),
     /* panels_dashboard  */ kPanelsDashboardPsx,
     /* panels_settings   */ kPanelsSettingsPsx,
     /* panels_controller */ kPanelsControllerCommon,
@@ -161,6 +162,7 @@ static inline void launcher_profile_apply_psx(RecompLauncherCGameInfo* gi) {
     gi->has_fmv_filter = 1;    /* MDEC decodes video at native res; how it is
                                 * scaled to the window is a player choice. */
     gi->has_frame_interp = 0; gi->has_spu_hq = 1; gi->has_skip_fmv = 0;
+    gi->has_scanlines = 1;     /* present-time CRT scanline post-process */
     gi->has_turbo_loads = 1; gi->has_bios = 1;
     gi->has_deadzone_pct = 1;
     gi->has_rewind_depth = RECOMP_UI_PSX_HAS_REWIND ? 1 : 0;

src/recomp_launcher.h

@@ -1021,6 +1021,15 @@ struct RecompLauncherCSettings {
      * against the roster, falling back to disc 1. Appended additively. */
     int  disc_index;
 
+    /* Scanline post-process on/off (GameInfo.has_scanlines consoles). 0 = off
+     * (also the unset default, like rewind_enabled — the host default is off, so
+     * a zero-initialized host predating this field gets the right answer), 1 =
+     * on. Appended additively. */
+    int  scanlines;
+    /* Scanline dark-gap depth as a percent. 0 = unset -> the model seeds 50; the
+     * effective range is 1..100. Stored as a percent (not 0..1) so the whole
+     * settings struct stays plain-int. Appended additively. */
+    int  scanline_strength_pct;
     /* NDS virtual stylus overlay. 0 is unset and means the launcher default
      * for the console, which is enabled; 1 is explicitly enabled, -1 is
      * explicitly disabled. Bindings live in assist_key_bind/assist_pad_bind so
@@ -1054,6 +1063,10 @@ struct RecompLauncherCSettings {
 
 /* Hosts can #ifdef on this to stay source-compatible with older recomp-ui. */
 #define RECOMP_LAUNCHER_HAS_FRAME_BLEND 1
+/* Scanline post-process (Settings.scanlines / scanline_strength_pct,
+ * GameInfo.has_scanlines). Hosts #ifdef on this to stay source-compatible with
+ * older recomp-ui that lacks the fields. */
+#define RECOMP_LAUNCHER_HAS_SCANLINES 1
 
 // ---- host verification/inspection results (filled by the callbacks below) ----
 // Plain-C structs so a host can implement the callbacks with zero launcher
@@ -1624,6 +1637,11 @@ typedef struct RecompLauncherCGameInfo {
     int (*persist_setup_discs)(void* ctx, const char* const* disc_paths,
                                int disc_count, const char* bios_path);
 
+    /* Display row for Settings.scanlines / scanline_strength_pct: a present-time
+     * scanline post-process (a checkbox plus a strength slider). Only meaningful
+     * for a console whose runtime implements it (PSX); everything else leaves
+     * this 0 and the rows are absent. Appended for ABI stability. */
+    int has_scanlines;
     /* NDS input convenience setting. When set, Settings shows a Virtual Stylus
      * opt-out and the Controller page may expose host-owned bindings for it. */
     int has_virtual_stylus;