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April 16, 2021 14:53
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Renderer for an answer to "Why was the Kickstart 1.x “Insert floppy” graphic so bad?" https://retrocomputing.stackexchange.com/a/13940
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package main | |
import ( | |
"image" | |
"image/draw" | |
"github.com/peterhellberg/gfx" | |
) | |
const width, height = 320, 200 | |
var ( | |
offset = gfx.Pt(70, 40) | |
palette = gfx.Palette{ | |
gfx.ColorNRGBA(0xFF, 0xFF, 0xFF, 0xFF), | |
gfx.ColorNRGBA(0x00, 0x00, 0x00, 0xFF), | |
gfx.ColorNRGBA(0x77, 0x77, 0xCC, 0xFF), | |
gfx.ColorNRGBA(0xBB, 0xBB, 0xBB, 0xFF), | |
} | |
) | |
func main() { | |
var isDrawing, inFloodFill bool | |
var lineColor, fillColor uint8 | |
var from, to image.Point | |
dst := gfx.NewPaletted(width, height, palette, palette[0]) | |
for i := 0; i < len(data); i += 2 { | |
f, s := data[i], data[i+1] | |
switch f { | |
case 0xFF: | |
isDrawing = false | |
if s == 0xFF { | |
break | |
} | |
lineColor = s | |
continue | |
case 0xFE: | |
isDrawing = false | |
inFloodFill = true | |
fillColor = s | |
continue | |
} | |
if !isDrawing { | |
from = pt(f, s) | |
isDrawing = true | |
} else { | |
to = pt(f, s) | |
line(dst, from, to, lineColor) | |
from = pt(f, s) | |
} | |
if inFloodFill { | |
inFloodFill = false | |
flood(dst, pt(f, s), fillColor) | |
} | |
} | |
gfx.SavePNG("/tmp/gfx-kickstart-insert-floppy.png", gfx.NewScaledPalettedImage(dst, 8)) | |
} | |
func pt(x, y byte) image.Point { | |
return gfx.Pt(int(x), int(y)) | |
} | |
func line(dst draw.Image, a, b image.Point, index uint8) { | |
c := palette.Color(int(index)) | |
gfx.DrawIntLine(dst, offset.X+a.X, offset.Y+a.Y, offset.X+b.X, offset.Y+b.Y, c) | |
} | |
func flood(dst *gfx.Paletted, p image.Point, index uint8) { | |
target := dst.ColorIndexAt(p.X, p.Y) | |
queue := []image.Point{p.Add(offset)} | |
for len(queue) > 0 { | |
p, queue = queue[0], queue[1:] | |
if p.In(dst.Bounds()) { | |
if dst.ColorIndexAt(p.X, p.Y) == target { | |
dst.SetColorIndex(p.X, p.Y, index) | |
queue = append(queue, | |
p.Add(gfx.Pt(0, 1)), | |
p.Add(gfx.Pt(1, 0)), | |
p.Add(gfx.Pt(0, -1)), | |
p.Add(gfx.Pt(-1, 0)), | |
) | |
} | |
} | |
} | |
} | |
var data = []byte{ | |
0xFF, 0x01, 0x23, 0x0B, 0x3A, 0x0B, 0x3A, 0x21, 0x71, 0x21, 0x71, 0x0B, 0x7D, 0x0B, 0x88, | |
0x16, 0x88, 0x5E, 0x7F, 0x5E, 0x7F, 0x38, 0x40, 0x38, 0x3E, 0x36, 0x35, 0x36, 0x34, 0x38, | |
0x2D, 0x38, 0x2D, 0x41, 0x23, 0x48, 0x23, 0x0B, 0xFE, 0x02, 0x25, 0x45, 0xFF, 0x01, 0x21, | |
0x48, 0x21, 0x0A, 0x7E, 0x0A, 0x8A, 0x16, 0x8A, 0x5F, 0x56, 0x5F, 0x56, 0x64, 0x52, 0x6C, | |
0x4E, 0x71, 0x4A, 0x74, 0x44, 0x7D, 0x3C, 0x81, 0x3C, 0x8C, 0x0A, 0x8C, 0x0A, 0x6D, 0x09, | |
0x6D, 0x09, 0x51, 0x0D, 0x4B, 0x14, 0x45, 0x15, 0x41, 0x19, 0x3A, 0x1E, 0x37, 0x21, 0x36, | |
0x21, 0x36, 0x1E, 0x38, 0x1A, 0x3A, 0x16, 0x41, 0x15, 0x45, 0x0E, 0x4B, 0x0A, 0x51, 0x0A, | |
0x6C, 0x0B, 0x6D, 0x0B, 0x8B, 0x28, 0x8B, 0x28, 0x76, 0x30, 0x76, 0x34, 0x72, 0x34, 0x5F, | |
0x32, 0x5C, 0x32, 0x52, 0x41, 0x45, 0x41, 0x39, 0x3E, 0x37, 0x3B, 0x37, 0x3E, 0x3A, 0x3E, | |
0x41, 0x3D, 0x42, 0x36, 0x42, 0x33, 0x3F, 0x2A, 0x46, 0x1E, 0x4C, 0x12, 0x55, 0x12, 0x54, | |
0x1E, 0x4B, 0x1A, 0x4A, 0x17, 0x47, 0x1A, 0x49, 0x1E, 0x4A, 0x21, 0x48, 0xFF, 0x01, 0x32, | |
0x3D, 0x34, 0x36, 0x3C, 0x37, 0x3D, 0x3A, 0x3D, 0x41, 0x36, 0x41, 0x32, 0x3D, 0xFF, 0x01, | |
0x33, 0x5C, 0x33, 0x52, 0x42, 0x45, 0x42, 0x39, 0x7D, 0x39, 0x7D, 0x5E, 0x34, 0x5E, 0x33, | |
0x5A, 0xFF, 0x01, 0x3C, 0x0B, 0x6F, 0x0B, 0x6F, 0x20, 0x3C, 0x20, 0x3C, 0x0B, 0xFF, 0x01, | |
0x60, 0x0E, 0x6B, 0x0E, 0x6B, 0x1C, 0x60, 0x1C, 0x60, 0x0E, 0xFE, 0x03, 0x3E, 0x1F, 0xFF, | |
0x01, 0x62, 0x0F, 0x69, 0x0F, 0x69, 0x1B, 0x62, 0x1B, 0x62, 0x0F, 0xFE, 0x02, 0x63, 0x1A, | |
0xFF, 0x01, 0x2F, 0x39, 0x32, 0x39, 0x32, 0x3B, 0x2F, 0x3F, 0x2F, 0x39, 0xFF, 0x01, 0x29, | |
0x8B, 0x29, 0x77, 0x30, 0x77, 0x35, 0x72, 0x35, 0x69, 0x39, 0x6B, 0x41, 0x6B, 0x41, 0x6D, | |
0x45, 0x72, 0x49, 0x72, 0x49, 0x74, 0x43, 0x7D, 0x3B, 0x80, 0x3B, 0x8B, 0x29, 0x8B, 0xFF, | |
0x01, 0x35, 0x5F, 0x35, 0x64, 0x3A, 0x61, 0x35, 0x5F, 0xFF, 0x01, 0x39, 0x62, 0x35, 0x64, | |
0x35, 0x5F, 0x4A, 0x5F, 0x40, 0x69, 0x3F, 0x69, 0x41, 0x67, 0x3C, 0x62, 0x39, 0x62, 0xFF, | |
0x01, 0x4E, 0x5F, 0x55, 0x5F, 0x55, 0x64, 0x51, 0x6C, 0x4E, 0x70, 0x49, 0x71, 0x46, 0x71, | |
0x43, 0x6D, 0x43, 0x6A, 0x4E, 0x5F, 0xFF, 0x01, 0x44, 0x6A, 0x44, 0x6D, 0x46, 0x70, 0x48, | |
0x70, 0x4C, 0x6F, 0x4D, 0x6C, 0x49, 0x69, 0x44, 0x6A, 0xFF, 0x01, 0x36, 0x68, 0x3E, 0x6A, | |
0x40, 0x67, 0x3C, 0x63, 0x39, 0x63, 0x36, 0x65, 0x36, 0x68, 0xFF, 0x01, 0x7E, 0x0B, 0x89, | |
0x16, 0x89, 0x5E, 0xFE, 0x01, 0x22, 0x0B, 0xFE, 0x01, 0x3B, 0x0B, 0xFE, 0x01, 0x61, 0x0F, | |
0xFE, 0x01, 0x6A, 0x1B, 0xFE, 0x01, 0x70, 0x0F, 0xFE, 0x01, 0x7E, 0x5E, 0xFE, 0x01, 0x4B, | |
0x60, 0xFE, 0x01, 0x2E, 0x39, 0xFF, 0xFF, | |
} |
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I found this video of the ROM image being rendered on an Amiga:
https://www.youtube.com/watch?v=gXhxE4j6dm0
Their AMOS program that renders the image