Ttf2lff (SECURE)

You can use this as a blog post, documentation, or a README file. 1. Overview ttf2lff is a command-line utility designed to bridge the gap between standard desktop font formats and resource-constrained embedded environments. It converts .ttf (TrueType) or .otf (OpenType) files into .lff (Linear Flash Font) – a raw, linearly addressable bitmap font format optimized for NOR Flash memory.

| Offset | Size | Field | Description | |--------|------|-------|-------------| | 0 | 4 | magic | 0x4C464630 ( LFF0 ) | | 4 | 2 | version | 0x0100 | | 6 | 2 | glyph_count | Number of glyphs stored | | 8 | 2 | cell_w | Maximum glyph width (pixels) | | 10 | 2 | cell_h | Maximum glyph height (pixels) | | 12 | 1 | bpp | Bits per pixel (1,2,4,8) | | 13 | 1 | flags | Bit 0: compressed | | 14 | 4 | offset_table | Absolute file offset to offset array | ttf2lff

Link the binary

LFF file too large for flash memory. Solution: Use --compress lz4 and subset characters with -c . You can use this as a blog post,

#include "roboto_24.h" extern const uint8_t font_lff_data[]; // linked from .lff binary void draw_char(int x, int y, char c) GlyphInfo info = get_glyph_info(font_lff_data, c); draw_bitmap(x, y, info.width, info.height, info.bits); It converts

ttf2lff -i Roboto-Regular.ttf -o roboto_24.lff -s 24 -c '32-126' --header roboto_24.h Embed in firmware (C example)

Missing Unicode characters. Solution: Verify your TTF contains those glyphs ( fc-query input.ttf ). 10. License MIT License – free for commercial and open-source embedded projects. For full documentation, see man ttf2lff or the GitHub repository.

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You can use this as a blog post, documentation, or a README file. 1. Overview ttf2lff is a command-line utility designed to bridge the gap between standard desktop font formats and resource-constrained embedded environments. It converts .ttf (TrueType) or .otf (OpenType) files into .lff (Linear Flash Font) – a raw, linearly addressable bitmap font format optimized for NOR Flash memory.

| Offset | Size | Field | Description | |--------|------|-------|-------------| | 0 | 4 | magic | 0x4C464630 ( LFF0 ) | | 4 | 2 | version | 0x0100 | | 6 | 2 | glyph_count | Number of glyphs stored | | 8 | 2 | cell_w | Maximum glyph width (pixels) | | 10 | 2 | cell_h | Maximum glyph height (pixels) | | 12 | 1 | bpp | Bits per pixel (1,2,4,8) | | 13 | 1 | flags | Bit 0: compressed | | 14 | 4 | offset_table | Absolute file offset to offset array |

Link the binary

LFF file too large for flash memory. Solution: Use --compress lz4 and subset characters with -c .

#include "roboto_24.h" extern const uint8_t font_lff_data[]; // linked from .lff binary void draw_char(int x, int y, char c) GlyphInfo info = get_glyph_info(font_lff_data, c); draw_bitmap(x, y, info.width, info.height, info.bits);

ttf2lff -i Roboto-Regular.ttf -o roboto_24.lff -s 24 -c '32-126' --header roboto_24.h Embed in firmware (C example)

Missing Unicode characters. Solution: Verify your TTF contains those glyphs ( fc-query input.ttf ). 10. License MIT License – free for commercial and open-source embedded projects. For full documentation, see man ttf2lff or the GitHub repository.

ttf2lff
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