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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 69):
* <benjamin@chausse.xyz> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Benjamin Chausse
* ----------------------------------------------------------------------------
*/
package main
import (
"fmt"
"io"
"os"
)
const (
topFmt = "\033[38;2;%d;%d;%dm"
botFmt = "\033[48;2;%d;%d;%dm"
postFmt = "▀\033[0m"
)
type pixelArt struct {
height uint32
width uint32
pixels []uint32
}
type pixel struct {
r uint8
g uint8
b uint8
}
func int2Pixel(src uint32) pixel {
return pixel{
b: uint8((src) & 0xFF),
g: uint8((src >> 8) & 0xFF),
r: uint8((src >> 16) & 0xFF),
}
}
type drawing struct {
height int
width int
pixels []pixel
}
func mkPixelStack(top, bot pixel) string {
noTop := (int(top.r+top.g+top.b) == 0)
noBot := (int(bot.r+bot.g+bot.b) == 0)
switch {
case noTop && noBot:
return " "
case noTop:
return fmt.Sprintf(botFmt+postFmt,
bot.r, bot.g, bot.b)
case noBot:
return fmt.Sprintf(topFmt+postFmt,
top.r, top.g, top.b)
default:
return fmt.Sprintf(topFmt+botFmt+postFmt,
top.r, top.g, top.b,
bot.r, bot.g, bot.b,
)
}
}
func (p pixelArt) draw(stream io.Writer) {
step := uint32(p.width * 2)
topIdx, botIdx := uint32(0), p.width
row := uint32(0)
top, bot := make([]pixel, p.width), make([]pixel, p.width)
if p.height%2 != 0 {
for i := range top {
top[i] = pixel{0, 0, 0}
bot[i] = int2Pixel(p.pixels[0])
}
drawRowStack(top, bot)
topIdx += step
botIdx += step
row++
}
for row < p.height/2 {
for i := range p.width {
top[i] = int2Pixel(p.pixels[topIdx+i])
bot[i] = int2Pixel(p.pixels[botIdx+i])
}
io.WriteString(stream, drawRowStack(top, bot))
topIdx += step
botIdx += step
row++
}
}
func drawRowStack(top, bot []pixel) string {
var str string
for i := 0; i < len(top); i++ {
str += mkPixelStack(top[i], bot[i])
}
return str + "\n"
}
func main() {
vim_logo := pixelArt{height: 72, width: 72, pixels: vim_data}
vim_logo.draw(os.Stdout)
}
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