1 files changed, 112 insertions, 0 deletions
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..9e8b22b
--- /dev/null
+++ b/main.go
@@ -0,0 +1,112 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "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)
+}