mirror of https://github.com/20kdc/OC-KittenOS.git
114 lines
3.1 KiB
Lua
114 lines
3.1 KiB
Lua
-- Copyright (C) 2018-2021 by KittenOS NEO contributors
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--
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-- Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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-- THIS SOFTWARE.
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local event = require("event")(neo)
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local neoux = require("neoux")(event, neo)
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local braille = require("braille")
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local bmp = require("bmp")
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local file = neoux.fileDialog(false)
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local header = file.read(bmp.headerMinSzBMP)
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local palette = ""
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local lcBase = bmp.headerMinSzBMP
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local palBase = bmp.headerMinSzBMP
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local lcWidth = 1
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local lc = {}
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local lcdq = {}
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local queueSize = 4
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if os.totalMemory() > (256 * 1024) then
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queueSize = 40
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end
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for i = 1, queueSize do
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lcdq[i] = 0
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end
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local function getLine(y)
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if not lc[y] then
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local idx = y * lcWidth
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file.seek("set", lcBase + idx - 1)
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if lcdq[1] then
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lc[table.remove(lcdq, 1)] = nil
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end
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table.insert(lcdq, y)
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lc[y] = file.read(lcWidth)
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end
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return lc[y]
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end
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local bitmap = bmp.connect(function (i)
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if i >= palBase then
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local v = palette:byte(i + 1 - palBase)
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if v then
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return v
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end
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end
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if i >= lcBase then
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local ld = getLine(math.floor((i - lcBase) / lcWidth))
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i = ((i - lcBase) % lcWidth) + 1
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return ld:byte(i) or 0
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end
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return header:byte(i) or 0
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end)
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file.seek("set", bitmap.paletteAddress - 1)
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palette = file.read(bitmap.paletteCol * 4)
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palBase = bitmap.paletteAddress
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lcBase = bitmap.dataAddress
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lcWidth = bitmap.dsSpan
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local running = true
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local function decodeRGB(rgb, igp, col)
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local r, g, b = math.floor(rgb / 65536) % 256, math.floor(rgb / 256) % 256, rgb % 256
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-- the new KittenOS NEO logo is 'sensitive' to dithering, so disable it
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if not col then
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-- ...and the palette is a bit odd, oh well
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if math.max(r, g, b) < 0xC0 then
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return 0, 0, 0
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end
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return 255, 255, 255
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end
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return r, g, b
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end
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local bW, bH = math.ceil(bitmap.width / 2), math.ceil(bitmap.height / 4)
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local fp = neoux.tcwindow(bW, bH, {
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braille.new(1, 1, bW, bH, {
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selectable = true,
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get = function (window, x, y, bg, fg, selected, colour)
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if x > bitmap.width then return 0, 0, 0 end
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if y > bitmap.height then return 0, 0, 0 end
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if bitmap.ignoresPalette then
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return decodeRGB(bitmap.getPixel(x - 1, y - 1, 0), true, colour)
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end
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return decodeRGB(bitmap.getPalette(bitmap.getPixel(x - 1, y - 1, 0)), false, colour)
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end
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}, 1)
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}, function (w)
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w.close()
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running = false
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end, 0xFFFFFF, 0)
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neoux.create(bW, bH, nil, function (w, t, r, ...)
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if t == "focus" then
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if r and not bitmap.ignoresPalette then
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local pal = {}
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for i = 0, math.min(15, bitmap.paletteCol - 1) do
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pal[i + 1] = bitmap.getPalette(i)
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end
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w.recommendPalette(pal)
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end
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end
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return fp(w, t, r, ...)
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end)
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while running do
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event.pull()
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end
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