1cb188d6d3
This allows the terminal to use a font from the disk at /fonts/terminal.lvfontbin for languages that need more characters than we want to ship. TileGrid now support 16bit indices as well. Font files for use with it are generated by the GitHub actions here: https://github.com/adafruit/circuitpython-font-generator
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2024 Scott Shawcroft for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "py/obj.h"
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#include "shared-module/displayio/Bitmap.h"
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#include "lib/oofatfs/ff.h"
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#define LVFONTIO_INVALID_CODEPOINT 0xFFFFFFFF
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// LV Font header information
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typedef struct {
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// Font size and metrics
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uint16_t font_size;
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uint16_t ascent;
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uint16_t default_advance_width;
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// Encoding formats
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uint8_t index_to_loc_format;
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uint8_t bits_per_pixel;
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uint8_t glyph_bbox_xy_bits;
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uint8_t glyph_bbox_wh_bits;
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uint8_t glyph_advance_bits;
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// Calculated values
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uint8_t glyph_header_bits;
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uint8_t glyph_header_bytes;
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} lvfontio_header_t;
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// Mapping of codepoint ranges to glyph IDs
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typedef struct {
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uint32_t range_start; // Start of codepoint range
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uint32_t range_end; // End of codepoint range (exclusive)
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uint16_t glyph_offset; // Offset to apply to codepoint
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uint8_t format_type; // Format type: 0=sparse mapping, 2=range to range, 3=direct mapping
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uint16_t entries_count; // Number of entries in sparse data
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uint32_t data_offset; // File offset to the cmap data
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} lvfontio_cmap_range_t;
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typedef struct {
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mp_obj_base_t base;
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// Bitmap containing cached glyphs
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displayio_bitmap_t *bitmap;
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// Source of font file path (either a const char* or a copied string)
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const char *file_path;
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// Array mapping glyph indices to codepoints
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uint32_t *codepoints;
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// Array of reference counts for each glyph slot
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uint16_t *reference_counts; // Use uint16_t to handle higher reference counts
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// Maximum number of glyphs to cache at once
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uint16_t max_glyphs;
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// Flag indicating whether to use m_malloc (true) or port_malloc (false)
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bool use_gc_allocator;
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uint8_t half_width_px;
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FIL file;
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bool file_is_open;
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// Font metrics information loaded from file
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lvfontio_header_t header;
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// CMAP information
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lvfontio_cmap_range_t *cmap_ranges;
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uint16_t cmap_range_count;
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// Offsets for tables in the file
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uint32_t loca_table_offset;
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uint32_t glyf_table_offset;
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uint32_t max_cid;
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} lvfontio_ondiskfont_t;
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