77 lines
1.9 KiB
Text
77 lines
1.9 KiB
Text
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T Colour
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Byte r, g, b
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F (r, g, b)
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.r = r
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.g = g
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.b = b
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F ==(other)
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R .r == other.r & .g == other.g & .b == other.b
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V black = Colour(0, 0, 0)
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V white = Colour(255, 255, 255)
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T Bitmap
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Int width, height
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Colour background
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[[Colour]] map
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F (width = 40, height = 40, background = white)
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assert(width > 0 & height > 0)
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.width = width
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.height = height
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.background = background
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.map = (0 .< height).map(h -> (0 .< @width).map(w -> @@background))
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F fillrect(x, y, width, height, colour = black)
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assert(x >= 0 & y >= 0 & width > 0 & height > 0)
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L(h) 0 .< height
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L(w) 0 .< width
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.map[y + h][x + w] = colour
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F chardisplay()
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V txt = .map.map(row -> row.map(bit -> (I bit == @@.background {‘ ’} E ‘@’)).join(‘’))
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txt = txt.map(row -> ‘|’row‘|’)
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txt.insert(0, ‘+’(‘-’ * .width)‘+’)
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txt.append(‘+’(‘-’ * .width)‘+’)
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print(reversed(txt).join("\n"))
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F set(x, y, colour = black)
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.map[y][x] = colour
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F get(x, y)
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R .map[y][x]
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F circle(x0, y0, radius, colour = black)
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V f = 1 - radius
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V ddf_x = 1
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V ddf_y = -2 * radius
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V x = 0
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V y = radius
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.set(x0, y0 + radius, colour)
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.set(x0, y0 - radius, colour)
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.set(x0 + radius, y0, colour)
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.set(x0 - radius, y0, colour)
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L x < y
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I f >= 0
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y--
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ddf_y += 2
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f += ddf_y
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x++
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ddf_x += 2
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f += ddf_x
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.set(x0 + x, y0 + y, colour)
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.set(x0 - x, y0 + y, colour)
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.set(x0 + x, y0 - y, colour)
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.set(x0 - x, y0 - y, colour)
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.set(x0 + y, y0 + x, colour)
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.set(x0 - y, y0 + x, colour)
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.set(x0 + y, y0 - x, colour)
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.set(x0 - y, y0 - x, colour)
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V bitmap = Bitmap(25, 25)
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bitmap.circle(x0' 12, y0' 12, radius' 12)
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bitmap.chardisplay()
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