spritebox 0.2.0

Zero-dependency, safe Rust pixel art as plain text: palettes, sprites, animations, tilesets with autotiling, tilemaps and pixel fonts, rendered to RGBA, PNG and atlases with metadata
Documentation 
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; Procedural textures: seeded noise drawn with a ramp of palette keys, used as
; sprites, layers and tiles. The same seed gives the same pixels everywhere, and
; textures wrap, so they tile with themselves.

palette ground
  .  transparent
  k  #1a1c2c
  G  #a7f070   ; grass, light to dark
  g  #38b764
  h  #257179
  s  #94b0c2   ; stone
  S  #566c86
  T  #333c57
  d  #b86f50   ; dirt
  D  #7a4841
  c  #73eff7   ; sky
  C  #41a6f6
  B  #3b5dc9
  w  #f4f4f4

texture grass 16x16 palette=ground seed=7
  noise cell=8 octaves=3 roughness=60
  ramp h g g G
  dither bayer4

texture stone 16x16 palette=ground seed=21
  noise cell=4 octaves=2
  ramp T S S s
  dither bayer2

texture sky 32x16 palette=ground seed=3
  noise cell=16 octaves=2 roughness=40
  ramp B C C c w
  dither bayer8

texture dirt 8x8 palette=ground seed=11
  noise cell=4 octaves=2
  ramp D d d
  dither bayer4

; A texture as a layer: a stone block with a dark rim drawn over it.
sprite block 16x16 palette=ground
  layer face = stone
  layer rim
    kkkkkkkkkkkkkkkk
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    k..............k
    kkkkkkkkkkkkkkkk

; Textures as tiles, and as the fill of an autotiled terrain.
tileset ground 8x8 palette=ground
  tile dirt = dirt
  terrain soil 16
    island
      .kkkkkk.
      kGGGGGGk
      kggggggk
      kddddddk
      kddDdddk
      kdddddDk
      kddddddk
      .kkkkkk.
    h_strip
      kkkkkkkk
      GGGGGGGG
      gggggggg
      dddddddd
      ddDddddD
      dddddDdd
      dddddddd
      kkkkkkkk
    v_strip
      kddddddk
      kddDdddk
      kddddddk
      kdddddDk
      kddddddk
      kdDddddk
      kddddddk
      kddddddk
    fill = dirt