unicode_text/test.lua

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#!/usr/bin/env lua5.1
-- -*- coding: utf-8 -*-
dofile("init.lua")
dofile("../tga_encoder/init.lua")
font_1 = unicode_text.hexfont(
{
kerning = true,
}
)
font_1:load_glyphs(
io.lines("unifont.hex")
)
font_1:load_glyphs(
io.lines("U+FFFD.hex")
)
-- The following text purposely contains glyphs not in unifont.hex, to
-- show that these are rendered like U+FFFD REPLACEMENT CHARACTER (<28>).
local text = "ABC... 123!!! (*ˊᗜˋ*)/ᵗᑋᵃᐢᵏ ᵞᵒᵘ* 😁\
\
U+0077 w LATIN SMALL LETTER W\
U+00F0 ð LATIN SMALL LETTER ETH\
U+2665 ♥ BLACK HEART SUIT\
U+10348 𐍈 GOTHIC LETTER HWAIR"
local pixels = font_1:render_text(text)
local image = tga_encoder.image(pixels)
image:save("test.tga")
font_2 = unicode_text.hexfont(
{
background_color = { 1 },
foreground_color = { 0 },
}
)
font_2:load_glyphs(
io.lines("unifont.hex")
)
font_2:load_glyphs(
io.lines("unifont_upper.hex")
)
local file = io.open("UTF-8-demo.txt")
-- encode image with colormap (palette)
tga_encoder.image(
font_2:render_text(
file:read("*all")
)
):save(
"UTF-8-demo.tga",
{
colormap = {
{ 0xFF, 0xFF, 0xFF },
{ 0x00, 0x00, 0xFF },
}
}
)
file:close()
font_2.background_color = { 0, 0, 0 }
font_2.foreground_color = { 255, 255, 255 }
font_2.tabulator_size = 4 * 8
local file = io.open("example.txt")
local text = file:read("*all")
file:close()
local pixels = font_2:render_text(text)
-- colorize text pixels
for h = 1, #pixels do
for w = 1, #pixels[h] do
local pixel = pixels[h][w]
if (
255 == pixel[1] and
255 == pixel[2] and
255 == pixel[3]
) then
pixel = {
( h + w ) % 128 + 128,
( h % w ) % 128 + 128,
( h - w ) % 128 + 128,
}
end
pixels[h][w] = pixel
end
end
-- encode image with 15-bit colors
tga_encoder.image(pixels):save(
"example.tga",
{
color_format="A1R5G5B5",
compression = "RAW",
}
)