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115 lines
4 KiB
Lua
115 lines
4 KiB
Lua
--[[ Lua draw number function
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2019 William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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]]
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--[[ Exposed Functions
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_draw_nums.print; binary (base = 2) , octal (base = 8), hexadecimal (base = 16)
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_draw_nums.nums; table of number characters
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]]
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if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end
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local _draw_nums = {} do
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local _poly = require "draw_poly"
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-- every 2 elements is an x, y coord pair
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-- n[?] = {x,y,x,y,x,y}
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local nums = {
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["b"] = {0,1,0,7,0,5,1,4,1,4,2,4,3,5,3,6,2,7,1,7,0,6,0,5},
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["o"] = {1,4,0,5,0,6,1,7,2,7,3,6,3,5,2,4,1,4},
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["x"] = {0,3,4,7,2,5,4,3,0,7},
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[-1] = {1,4, 3,4},
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[0] = {1,2,1,6,2,7,3,7,4,6,4,2,3,1,2,1,1,2},
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[1] = {3,1,3,7},
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[2] = {1,1,3,1,4,2,4,3,3,4,1,5,1,7,4,7},
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[3] = {1,1,3,1,4,2,4,3,3,4,2,4,3,4,4,5,4,6,3,7,1,7},
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[4] = {1,1,1,3,2,4,4,4,4,1,4,7},
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[5] = {1,1,4,1,1,1,1,4,3,4,4,5,4,7,1,7},
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[6] = {1,2,1,4,1,6,2,7,3,7,4,6,4,4,1,4,1,2,2,1,4,1},
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[7] = {1,1,4,1,4,2,1,7},
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[8] = {1,2,1,6,2,7,3,7,4,6,4,4,1,4,4,4,4,2,3,1,2,1,1,2},
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[9] = {4,6,4,4,4,2,3,1,2,1,1,2,1,4,4,4,4,6,3,7,1,7},
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[10] = {1,7,1,4,4,4,4,7,4,2,3,1,2,1,1,2,1,4},
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[11] = {1,1,1,7,3,7,4,6,4,5,3,4,1,4,3,4,4,3,4,2,3,1,1,1},
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[12] = {4,2,3,1,2,1,1,2,1,6,2,7,3,7,4,6},
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[13] = {1,1,1,7,3,7,4,6,4,2,3,1,1,1},
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[14] = {4,1,1,1,1,4,3,4,1,4,1,7,4,7},
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[15] = {4,1,1,1,1,4,3,4,1,4,1,7},
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}
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_draw_nums.nums = nums
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_draw_nums.print = function(img, num, x, y, chrw, color, base, prefix, bClip, scale_x, scale_y, t_nums)
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scale_x = scale_x or 1
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scale_y = scale_y or 1
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chrw = chrw * scale_x
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prefix = (prefix == nil or prefix == true) and true or false
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t_nums = t_nums or nums
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local max_x, max_y, digits = 0, 0, {}
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if num <= 0 then
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if num < 0 then
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digits[-3] = -1
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num = -num
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else
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digits[0] = 0
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end
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end
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if not prefix and (base == 2 or base == 8 or base == 16) then
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-- no prefix
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elseif base == 2 then
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digits[-1] = "b"
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elseif base == 8 then
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digits[-1] = "o"
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elseif base == 10 then
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-- no prefix
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elseif base == 16 then
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digits[-2] = 0
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digits[-1] = "x"
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elseif base == nil then -- default
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base = 10
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else
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error("unknown number base: " .. base)
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return nil
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end
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while num > 0 do -- get each digit (LeastSignificant)
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digits[#digits + 1] = num % base;
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num=num/base;
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end
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digits[#digits + 1] = digits[0] -- zero
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digits[#digits + 1] = digits[-1] -- base prefix
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digits[#digits + 1] = digits[-2] -- base prefix (hex)
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digits[#digits + 1] = digits[-3] -- neg sign
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for i = #digits, 1, -1 do
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max_x, max_y = _poly.polyline(img, x, y, t_nums[digits[i]],
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color, false, bClip, scale_x, scale_y)
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x = x + chrw
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end
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return x, y + max_y, chrw
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end
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end
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return _draw_nums
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