proto/glyphs.proto


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// Protocol Version 1

package llmr.glyphs;

option optimize_for = LITE_RUNTIME;

// Stores a glyph with metrics and optional SDF bitmap information.
message glyph {
    required uint32 id = 1;

    // A signed distance field of the glyph with a border of 3 pixels.
    optional bytes bitmap = 2;

    // Glyph metrics.
    required uint32 width = 3;
    required uint32 height = 4;
    required sint32 left = 5;
    required sint32 top = 6;
    required uint32 advance = 7;
}

// Stores fontstack information and a list of faces.
message fontstack {
    required string name = 1;
    required string range = 2;
    repeated glyph glyphs = 3;
}

message glyphs {
    repeated fontstack stacks = 1;

    extensions 16 to 8191;
}