(EMSCRIPTEN) add analog emulator support

Makefile.emscripten

@@ -60,7 +60,7 @@ WANT_MINIZ = 1
 MEMORY = 67108864
 LTO = 0
 # XXX: setting this to 1/2 currently crashes Firefox nightly
-PRECISE_F32 = 0
+PRECISE_F32 = 2
 
 ifneq ($(NATIVE_ZLIB),)
    WANT_MINIZ = 0

emscripten/RWebInput.h

@@ -17,7 +17,7 @@
 
 typedef struct rwebinput_state
 {
-   char keys[32];
+   uint8_t keys[32];
    int mouse_x;
    int mouse_y;
    char mouse_l;

emscripten/library_rwebinput.js

@@ -58,7 +58,7 @@ var LibraryRWebInput = {
       }
    },
 
-   RWebInputInit: function(latency) {
+   RWebInputInit: function() {
       if (RI.contexts.length === 0) {
          document.addEventListener('keyup', RI.eventHandler, false);
          document.addEventListener('keydown', RI.eventHandler, false);

input/input_common.c

@@ -662,6 +662,22 @@ const struct rarch_key_map rarch_key_map_rwebinput[] = {
    { 88, RETROK_x },
    { 89, RETROK_y },
    { 90, RETROK_z },
+   { 222, RETROK_QUOTE },
+   { 188, RETROK_COMMA },
+   { 173, RETROK_MINUS },
+   { 191, RETROK_SLASH },
+   { 59, RETROK_SEMICOLON },
+   { 61, RETROK_EQUALS },
+   { 219, RETROK_LEFTBRACKET },
+   { 220, RETROK_BACKSLASH },
+   { 221, RETROK_RIGHTBRACKET },
+   { 188, RETROK_KP_PERIOD },
+   { 17, RETROK_RCTRL },
+   { 18, RETROK_RALT },
+   { 190, RETROK_PERIOD },
+   { 145, RETROK_SCROLLOCK },
+   { 20, RETROK_CAPSLOCK },
+   { 144, RETROK_NUMLOCK },
    { 0, RETROK_UNKNOWN },
 };
 #endif

input/rwebinput_input.c

@@ -19,6 +19,7 @@
 
 #include "../boolean.h"
 #include "../general.h"
+#include "keyboard_line.h"
 
 #include "../emscripten/RWebInput.h"
 
@@ -92,6 +93,17 @@ static int16_t rwebinput_mouse_state(rwebinput_input_t *rwebinput, unsigned id)
    }
 }
 
+static int16_t rwebinput_analog_pressed(rwebinput_input_t *rwebinput, const struct retro_keybind *binds, unsigned index, unsigned id)
+{
+   unsigned id_minus = 0;
+   unsigned id_plus  = 0;
+   input_conv_analog_id_to_bind_id(index, id, &id_minus, &id_plus);
+
+   int16_t pressed_minus = rwebinput_is_pressed(rwebinput, binds, id_minus) ? -0x7fff : 0;
+   int16_t pressed_plus = rwebinput_is_pressed(rwebinput, binds, id_plus) ? 0x7fff : 0;
+   return pressed_plus + pressed_minus;
+}
+
 static int16_t rwebinput_input_state(void *data, const struct retro_keybind **binds, unsigned port, unsigned device, unsigned index, unsigned id)
 {
    rwebinput_input_t *rwebinput = (rwebinput_input_t*)data;
@@ -101,6 +113,9 @@ static int16_t rwebinput_input_state(void *data, const struct retro_keybind **bi
       case RETRO_DEVICE_JOYPAD:
          return rwebinput_is_pressed(rwebinput, binds[port], id);
 
+      case RETRO_DEVICE_ANALOG:
+         return rwebinput_analog_pressed(rwebinput, binds[port], index, id);
+
       case RETRO_DEVICE_KEYBOARD:
          return rwebinput_key_pressed(rwebinput, id);
 
@@ -127,6 +142,23 @@ static void rwebinput_input_poll(void *data)
    rwebinput_input_t *rwebinput = (rwebinput_input_t*)data;
 
    rwebinput_state_t *state = RWebInputPoll(rwebinput->context);
+
+   // get new keys
+   for (unsigned i = 0; i < 32; i++)
+   {
+      if (state->keys[i] != rwebinput->state.keys[i])
+      {
+         uint8_t diff = state->keys[i] ^ rwebinput->state.keys[i];
+         for (unsigned k = 0; diff; diff >>= 1, k++)
+         {
+            if (diff & 1)
+            {
+               input_keyboard_event((state->keys[i] & (1 << k)) != 0, input_translate_keysym_to_rk(i * 8 + k), 0, 0);
+            }
+         }
+      }
+   }
+
    memcpy(&rwebinput->state, state, sizeof(rwebinput->state));
 }
 
@@ -141,6 +173,7 @@ static uint64_t rwebinput_get_capabilities(void *data)
    uint64_t caps = 0;
 
    caps |= (1 << RETRO_DEVICE_JOYPAD);
+   caps |= (1 << RETRO_DEVICE_ANALOG);
    caps |= (1 << RETRO_DEVICE_KEYBOARD);
    caps |= (1 << RETRO_DEVICE_MOUSE);