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27 lines
457 B
Racket
27 lines
457 B
Racket
#lang brag
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gif-file : header logical_screen u1*
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header : magic version
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magic : GIF-HEADER
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version : u1 u1 u1
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logical_screen : image_width image_height flags bg_color_index pixel_aspect_ratio
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image_width : u2le
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image_height :u2le
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flags : u1
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bg_color_index : u1
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pixel_aspect_ratio : u1
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u2le : BYTE BYTE
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u1 : BYTE
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color_table : color_table_entry*
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color_table_entry : red green blue
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red : u1
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green : u1
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blue : u1
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#block : block_type body
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#block_type : u1
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