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bgcode.hexpat
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bgcode.hexpat
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#pragma author Shadlock0133 (aka Aurora)
#pragma description Prusa Binary G-Code
import type.magic;
import std.mem;
enum ChecksumType : u16 {
None,
CRC32,
};
enum BlockType : u16 {
FileMetadata,
GCode,
SlicerMetadata,
PrinterMetadata,
PrintMetadata,
Thumbnail,
};
enum Compression : u16 {
None,
Deflate,
Heatshrink11_4,
Heatshrink12_4,
};
enum Encoding : u16 {
Ini,
};
enum ImageFormat : u16 {
Png,
Jpg,
Qoi,
};
struct Header {
type::Magic<"GCDE"> magic;
u32 version;
ChecksumType checksum_type;
};
Header header @ 0;
std::assert(header.version == 1, "only version 1 supported");
struct Block {
BlockType type;
Compression compression;
u32 uncompressed_size;
auto size = uncompressed_size;
if (compression != Compression::None) {
u32 compressed_size;
size = compressed_size;
}
match (type) {
(BlockType::FileMetadata
| BlockType::PrinterMetadata
| BlockType::PrintMetadata
| BlockType::SlicerMetadata): {
Encoding encoding;
}
(BlockType::Thumbnail): {
ImageFormat image_format;
u16 width;
u16 height;
}
(BlockType::GCode): {
u16;
}
(_): { std::assert(false, "unknown type"); }
}
u8 data[size];
match (header.checksum_type) {
(ChecksumType::None): {}
(ChecksumType::CRC32): { u32 checksum; }
}
};
Block blocks[while(!std::mem::eof())] @ $;