"Add" support for Wii SDL2. (#423)

arch/wii/Makefile.in

@@ -78,7 +78,11 @@ build: package ${build}
 ifeq ($(BUILD_SDL),)
 	${CP} arch/wii/pad.config ${build}
 else
+ifeq (${BUILD_SDL},1)
 	${CP} arch/wii/pad.config.sdl ${build}/pad.config
+else
+	${CP} arch/wii/pad.config.sdl2 ${build}/pad.config
+endif
 endif
 	${CP} arch/wii/icon.png ${build}
 	${CP} boot.dol ${build}

arch/wii/pad.config.sdl2

@@ -0,0 +1,59 @@
+# Wii Remote (+ nunchuck or classic)
+#
+# Axis1:   -left +right (left stick, nunchuck stick)
+# Axis2:   -up   +down
+# Axis3:   -left +right (right stick)
+# Axis4:   -up   +down
+#
+# As of 2024-01-31, no axes are assigned to the triggers for some reason.
+#
+# Button1: A
+# Button2: B
+# Button3: 1
+# Button4: 2
+# Button5: -
+# Button6: +
+# Button7: Home
+# Button8: Z (nunchuck)
+# Button9: C (nunchuck)
+# Button10: X
+# Button11: Y
+# Button12: L
+# Button13: R
+# Button14: ZL
+# Button15: ZR
+# Hat1: dpad
+
+# Gamecube controller
+#
+# Axis1:   -left +right (left stick, nunchuck stick)
+# Axis2:   -up   +down
+# Axis3:   -left +right (right stick)
+# Axis4:   -up   +down
+# Axis5:   +L
+# Axis6:   +R
+#
+# Button1: A
+# Button2: B
+# Button3: X
+# Button4: Y
+# Button5: L
+# Button6: R
+# Button7: Z
+# Button8: Start
+# Hat1: dpad
+
+# You might need to take the mappings printed in stdout.txt and modify them
+# to suit you:
+
+#gamepad_add = 050000007e0500000305000001000000,Wiimote 0 + Classic,a:b1,b:b0,x:b10,y:b9,back:b4,guide:b6,start:b5,leftshoulder:b13,rightshoulder:b14,dpup:h0.1,dpdown:h0.4,dpleft:h0.8,dpright:h0.2,leftx:a0,lefty:a1,rightx:a2,righty:a3,lefttrigger:b11,righttrigger:b12,
+
+# Because this build uses SDL, MZX can generate mappings automatically with
+# the SDL gamepad API. However, this API is based on XInput and has
+# the face buttons inverted from where they'd be expected on a Nintendo system.
+# Uncommenting this "fixes" the classic controller but breaks gamecube controllers.
+
+#gamepad.a = act_b
+#gamepad.b = act_a
+#gamepad.x = act_y
+#gamepad.y = act_x

docs/platform_matrix.html

@@ -55,7 +55,7 @@
 var no_updater = subopt("NO", 6);
 var no_updater_unix = subopt("NO", 7);
 var optional_sdl_3ds = std("NO / SDL 1.2 / SDL 2", 8);
-var optional_sdl_wii = std("NO / SDL 1.2", 9);
+var optional_sdl_wii = std("NO / SDL 1.2 / SDL 2", 9);
 var yes_but_8bpp = subopt("YES (8bpp)", 10);
 var no_gl_switch = subopt("NO", 11);
 var no_gl_fixed_android = subopt("NO", 12);
@@ -956,9 +956,11 @@ <h2>Platform Notes</h2>
 SDL significantly increases the size of the MZX executable.
 </li>
 
-<li id="note9">Building MZX with SDL Wii is viable, but produces larger
-binaries than desired, relies on the software renderer, and SDL Wii is
-considered unstable.
+<li id="note9">Building MZX with SDL Wii (1.2) or SDL2 is viable, but
+produces larger binaries than desired and relies on the software renderer.
+SDL Wii (1.2) is also considered unstable. Also, the SDL controller mappings
+are far less flexible than MZX's built-in support and may omit features (like
+the classic controller's analog triggers).
 </li>
 
 <li id="note10">Layer rendering is supported on this platform by as it