Vitepress conversion of docs. (#23795)
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# QMK Font Format :id=qmk-font-format
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# QMK Font Format {#qmk-font-format}
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QMK uses a font format _("Quantum Font Format" - QFF)_ specifically for resource-constrained systems.
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@ -16,11 +16,11 @@ The general structure of the file is:
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* _Font palette block_ (optional, depending on frame format)
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* _Font data block_
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## Block Header :id=qff-block-header
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## Block Header {#qff-block-header}
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The block header is identical to [QGF's block header](quantum_painter_qgf.md#qgf-block-header), and is present for all blocks, including the font descriptor.
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The block header is identical to [QGF's block header](quantum_painter_qgf#qgf-block-header), and is present for all blocks, including the font descriptor.
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## Font descriptor block :id=qff-font-descriptor
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## Font descriptor block {#qff-font-descriptor}
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* _typeid_ = 0x00
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* _length_ = 20
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@ -47,9 +47,9 @@ typedef struct __attribute__((packed)) qff_font_descriptor_v1_t {
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// _Static_assert(sizeof(qff_font_descriptor_v1_t) == (sizeof(qgf_block_header_v1_t) + 20), "qff_font_descriptor_v1_t must be 25 bytes in v1 of QFF");
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```
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The values for `format`, `flags`, `compression_scheme`, and `transparency_index` match [QGF's frame descriptor block](quantum_painter_qgf.md#qgf-frame-descriptor), with the exception that the `delta` flag is ignored by QFF.
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The values for `format`, `flags`, `compression_scheme`, and `transparency_index` match [QGF's frame descriptor block](quantum_painter_qgf#qgf-frame-descriptor), with the exception that the `delta` flag is ignored by QFF.
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## ASCII glyph table :id=qff-ascii-table
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## ASCII glyph table {#qff-ascii-table}
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* _typeid_ = 0x01
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* _length_ = 290
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@ -69,7 +69,7 @@ typedef struct __attribute__((packed)) qff_ascii_glyph_table_v1_t {
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// _Static_assert(sizeof(qff_ascii_glyph_table_v1_t) == (sizeof(qgf_block_header_v1_t) + 285), "qff_ascii_glyph_table_v1_t must be 290 bytes in v1 of QFF");
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```
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## Unicode glyph table :id=qff-unicode-table
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## Unicode glyph table {#qff-unicode-table}
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* _typeid_ = 0x02
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* _length_ = variable
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} qff_unicode_glyph_table_v1_t;
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```
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## Font palette block :id=qff-palette-descriptor
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## Font palette block {#qff-palette-descriptor}
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* _typeid_ = 0x03
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* _length_ = variable
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The _font palette block_ is identical to [QGF's frame palette block](quantum_painter_qgf.md#qgf-frame-palette-descriptor), retaining the same _typeid_ of 0x03.
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The _font palette block_ is identical to [QGF's frame palette block](quantum_painter_qgf#qgf-frame-palette-descriptor), retaining the same _typeid_ of 0x03.
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It is only specified in the QFF if the font is palette-based, and follows the _unicode glyph block_ if the font contains any Unicode glyphs, or the _ASCII glyph block_ if the font contains only ASCII glyphs.
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## Font data block :id=qff-data-descriptor
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## Font data block {#qff-data-descriptor}
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* _typeid_ = 0x04
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* _length_ = variable
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The _font data block_ is the last block in the file and is identical to [QGF's frame data block](quantum_painter_qgf.md#qgf-frame-data-descriptor), however has a different _typeid_ of 0x04 in QFF.
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The _font data block_ is the last block in the file and is identical to [QGF's frame data block](quantum_painter_qgf#qgf-frame-data-descriptor), however has a different _typeid_ of 0x04 in QFF.
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