ogc: add USB keyboard support (#68)

Author: mrpapersonic

CMakeLists.txt

@@ -2944,7 +2944,7 @@ elseif(OGC)
   endif()
   list(APPEND EXTRA_LDFLAGS "${OGC_ARCH_SETTINGS} ${OGC_LINKER_FLAGS}")
   if(NINTENDO_WII)
-    list(APPEND EXTRA_LIBS "wiiuse;bte")
+    list(APPEND EXTRA_LIBS "wiiuse;bte;wiikeyboard")
   endif()
   list(APPEND EXTRA_LIBS "ogc;m")
 endif()

src/main/wii/SDL_wii_main.c

@@ -73,7 +73,7 @@ int main(int argc, char *argv[])
     WPAD_SetVRes(WPAD_CHAN_ALL, 640, 480);
 
     MOUSE_Init();
-    // TODO KEYBOARD_Init(NULL);
+    KEYBOARD_Init(NULL);
     fatInitDefault();
 
     /* Call the user's main function. Make sure that argv contains at least one

src/video/ogc/SDL_ogcevents.c

@@ -27,6 +27,7 @@
 #include "../../events/SDL_events_c.h"
 
 #include "SDL_ogcevents_c.h"
+#include "SDL_ogckeyboard.h"
 #include "SDL_ogcmouse.h"
 #include "SDL_ogcvideo.h"
 
@@ -99,6 +100,7 @@ void OGC_PumpEvents(_THIS)
 
 #ifdef __wii__
     pump_ir_events(_this);
+    OGC_PumpKeyboardEvents(_this);
 #endif
 }
 

src/video/ogc/SDL_ogckeyboard.c

@@ -0,0 +1,59 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <[email protected]>
+
+  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.
+*/
+#include "SDL_ogckeyboard.h"
+#include "../../events/SDL_keyboard_c.h"
+
+#if defined(SDL_VIDEO_DRIVER_OGC) && defined(__wii__)
+#include <gctypes.h>
+#include <wiikeyboard/keyboard.h>
+
+void OGC_PumpKeyboardEvents(_THIS) {
+    keyboard_event ke;
+
+    s32 res = KEYBOARD_GetEvent(&ke);
+    if (res && (ke.type == KEYBOARD_RELEASED || ke.type == KEYBOARD_PRESSED)) {
+        SDL_SendKeyboardKey((ke.type == KEYBOARD_PRESSED) ? SDL_PRESSED : SDL_RELEASED, (SDL_Scancode)ke.keycode);
+
+        if (ke.type == KEYBOARD_PRESSED) {
+            const Uint16 symbol = ke.symbol;
+            char utf8[4] = {'\0'};
+
+            /* ignore private symbols, used by wiikeyboard for special keys */
+            if ((symbol >= 0xE000 && symbol <= 0xF8FF) || symbol == 0xFFFF)
+                return;
+
+            /* convert UCS-2 to UTF-8 */
+            if (symbol < 0x80) {
+                utf8[0] = symbol;
+            } else if (symbol < 0x800) {
+                utf8[0] = 0xC0 | (symbol >> 6);
+                utf8[1] = 0x80 | (symbol & 0x3F);
+            } else {
+                utf8[0] = 0xE0 |  (symbol >> 12);
+                utf8[1] = 0x80 | ((symbol >> 6) & 0x3F);
+                utf8[2] = 0x80 |  (symbol & 0x3F);
+            }
+
+            SDL_SendKeyboardText(utf8);
+        }
+    }
+}
+#endif

src/video/ogc/SDL_ogckeyboard.h

@@ -0,0 +1,34 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 Sam Lantinga <[email protected]>
+
+  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.
+*/
+
+#ifndef SDL_OGC_keyboard_h_
+#define SDL_OGC_keyboard_h_
+
+#include "../../SDL_internal.h"
+#include "SDL_ogcvideo.h"
+
+#ifdef __wii__
+void OGC_PumpKeyboardEvents(_THIS);
+#endif
+
+#endif /* SDL_OGC_keyboard_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */