Res: Add demo input display script

res/scripts/input-display.lua

@@ -0,0 +1,122 @@
+input_display = {
+	anchor = "top",
+	offset = {
+		x = 0,
+		y = 0,
+	}
+}
+
+local state = {
+	drawButton = {
+		[0] = function(state) -- A
+			state.painter:drawCircle(27, 6, 4)
+		end,
+		[1] = function(state) -- B
+			state.painter:drawCircle(23, 8, 4)
+		end,
+		[2] = function(state) -- Select
+			state.painter:drawCircle(13, 11, 3)
+		end,
+		[3] = function(state) -- Start
+			state.painter:drawCircle(18, 11, 3)
+		end,
+		[4] = function(state) -- Right
+			state.painter:drawRectangle(9, 7, 4, 3)
+		end,
+		[5] = function(state) -- Left
+			state.painter:drawRectangle(2, 7, 4, 3)
+		end,
+		[6] = function(state) -- Up
+			state.painter:drawRectangle(6, 3, 3, 4)
+		end,
+		[7] = function(state) -- Down
+			state.painter:drawRectangle(6, 10, 3, 4)
+		end,
+		[8] = function(state) -- R
+			state.painter:drawRectangle(28, 0, 4, 3)
+		end,
+		[9] = function(state) -- L
+			state.painter:drawRectangle(0, 0, 4, 3)
+		end
+	},
+	maxKey = {
+		[C.PLATFORM.GBA] = 9,
+		[C.PLATFORM.GB] = 7,
+	}
+}
+state.overlay = canvas:newLayer(32, 16)
+state.painter = image.newPainter(state.overlay.image)
+state.painter:setBlend(false)
+state.painter:setFill(true)
+
+function state.update()
+	local keys = util.expandBitmask(emu:getKeys())
+	local maxKey = state.maxKey[emu:platform()]
+
+	for key = 0, maxKey do
+		if emu:getKey(key) ~= 0 then
+			state.painter:setFillColor(0x80FFFFFF)
+		else
+			state.painter:setFillColor(0x40404040)
+		end
+		state.drawButton[key](state)
+	end
+	state.overlay:update()
+end
+
+function state.reset()
+	local endX = canvas:screenWidth() - 32
+	local endY = canvas:screenHeight() - 16
+
+	local anchors = {
+		topLeft = {
+			x = 0,
+			y = 0
+		},
+		top = {
+			x = endX / 2,
+			y = 0
+		},
+		topRight = {
+			x = endX,
+			y = 0
+		},
+		left = {
+			x = 0,
+			y = endY / 2
+		},
+		center = {
+			x = endX / 2,
+			y = endY / 2
+		},
+		right = {
+			x = endX,
+			y = endY / 2
+		},
+		bottomLeft = {
+			x = 0,
+			y = endY
+		},
+		bottom = {
+			x = endX / 2,
+			y = endY
+		},
+		bottomRight = {
+			x = endX,
+			y = endY
+		},
+	}
+
+	local pos = anchors[input_display.anchor];
+	pos.x = pos.x + input_display.offset.x;
+	pos.y = pos.y + input_display.offset.y;
+
+	state.overlay:setPosition(pos.x, pos.y);
+	state.painter:setFillColor(0x40808080)
+	state.painter:drawRectangle(0, 0, 32, 16)
+	state.overlay:update()
+end
+
+state.reset()
+callbacks:add("frame", state.update)
+callbacks:add("start", state.reset)