Dither/pixelfunctions.lua at master · trelemar/Dither · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
pixelFunction = {}

function pixelFunction.allwhite(x,y,r,g,b,a)
	r, g, b, a = 255, 255, 255, 0
	return r, g, b, a
end

function pixelFunction.clear(x,y,r,g,b,a)
	r, g, b, a = 255, 255, 255, 0
	return r, g, b, a
end

function pixelFunction.merge(x,y,r,g,b,a)
	local nr, ng, nb, na = currentFrame[currentLayer]:getPixel(x, y)
	if r == 0 and g == 0 and b == 0 and a == 0 then
	else
		r, g, b, a = nr, ng, nb, na
	end
	return r, g, b, a
end

function biggerPencil(x, y, size, color)
	if not tmath.Within(x, y, currentData:getWidth(), currentData:getHeight()) then return end
	if x == touchx + size then return end
	if y == touchy + size then return end
	currentData:setPixel(x, y, color)
	x = x + 1
	return biggerPencil(x, y, size, color)
end

function floodFill(x, y, target_color, replacement_color)
	if not tmath.Within(x, y, currentData:getWidth(), currentData:getHeight()) then return
	elseif target_color == replacement_color then return
	elseif currentData:getPixel(x, y) ~= target_color then return
	else
	currentData:setPixel(x, y, replacement_color)
	floodFill(x, y + 1, target_color, replacement_color)
	floodFill(x, y - 1, target_color, replacement_color)
	floodFill(x - 1, y, target_color, replacement_color)
	floodFill(x + 1, y, target_color, replacement_color)
	return floodFill(x, y, target_color, replacement_color)
	end
end

function NewLayer()
	 table.insert(currentFrame, currentLayer + 1, love.image.newImageData(currentData:getWidth(), currentData:getHeight()))
		currentLayer = currentLayer + 1
		currentData = currentFrame[currentLayer]
		LayerSpinner.max, LayerSpinner.value = #currentFrame, currentLayer
		table.insert(FrameImages, currentLayer, love.graphics.newImage(currentFrame[currentLayer]))
		currentimage = FrameImages[currentLayer]
end

function MoveLayer(direction)
	local belowLayer = currentLayer + direction
		currentFrame[currentLayer], currentFrame[belowLayer] = currentFrame[belowLayer], currentFrame[currentLayer]
		FrameImages[currentLayer], FrameImages[belowLayer] = FrameImages[belowLayer], FrameImages[currentLayer]
		LayerSpinner.value = LayerSpinner.value + direction
	for i, v in pairs(FrameImages) do
		v:refresh()
	end
	currentimage:refresh()
end

function RemoveLayer()
	table.remove(currentFrame, currentLayer)
	currentLayer = currentLayer - 1
	currentData = currentFrame[currentLayer]
	LayerSpinner.max, LayerSpinner.value = LayerSpinner.max - 1, currentLayer
	table.remove(FrameImages, currentLayer + 1)
	currentimage = FrameImages[currentLayer]
end

function MergeLayer()
	currentFrame[currentLayer - 1]:mapPixel(pixelFunction.merge)
	RemoveLayer()
end