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Add 2-bit compressed rendering for large UI fonts

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Refactor UI font generation to support different rendering modes based on size. Small UI fonts (12pt) use 1-bit rendering for crisp display and reduced flash usage. Large UI fonts (14pt) now use 2-bit compressed rendering to stay smooth when scaled up on touch/high-density boards. Extract font generation logic into reusable generate_ui_font() function.
This commit is contained in:
Justin Mitchell
2026-06-17 01:18:17 -04:00
parent 4a17d21d80
commit 4f55444f67
7 changed files with 7073 additions and 22 deletions
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lib/EpdFont/scripts/convert-builtin-fonts.sh
+31 -12
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@@ -28,23 +28,42 @@ for size in ${NOTOSANS_FONT_SIZES[@]}; do
done
done
# Small UI chrome (button devices, uiScale 1.0). Rendered 1-bit: crisp at these
# sizes and half the flash of 2-bit.
UI_FONT_SIZES=(10 12)
# Larger UI chrome substituted in on touch/high-density boards via the uiScale
# remap (see src/main.cpp setupFonts). Rendered 2-bit so it stays smooth when
# enlarged. Touch boards use uiScale 1.2, so UI_12 -> 14.4 -> 14 is the size the
# remap actually lands on; add larger sizes here if a board adopts a higher scale.
UI_FONT_SIZES_LARGE=(14)
UI_FONT_STYLES=("Regular" "Bold")
# Ubuntu lacks the Latin Extended Additional block (U+1EA0-U+1EF9) used for
# Vietnamese tone marks. Append a Vietnamese-only Ubuntu cut so those glyphs are
# filled from it while every glyph Ubuntu already has stays unchanged (fontstack
# is ordered by descending priority). NotoSansHebrew fills U+05D0-U+05EA so the
# Hebrew UI translation renders in menus and settings.
generate_ui_font() {
local size="$1" style="$2" extra_flags="$3"
local font_name="ubuntu_${size}_$(echo $style | tr '[:upper:]' '[:lower:]')"
local font_path="../builtinFonts/source/Ubuntu/Ubuntu-${style}.ttf"
local hebrew_path="../builtinFonts/source/NotoSansHebrew/NotoSansHebrew-${style}.ttf"
local viet_path="../builtinFonts/source/Ubuntu/Ubuntu-Vietnamese-${style}.ttf"
local output_path="../builtinFonts/${font_name}.h"
python fontconvert.py $font_name $size $font_path $hebrew_path $viet_path \
--additional-intervals 0x05D0,0x05EA $extra_flags > $output_path
echo "Generated $output_path"
}
for size in ${UI_FONT_SIZES[@]}; do
for style in ${UI_FONT_STYLES[@]}; do
font_name="ubuntu_${size}_$(echo $style | tr '[:upper:]' '[:lower:]')"
font_path="../builtinFonts/source/Ubuntu/Ubuntu-${style}.ttf"
hebrew_path="../builtinFonts/source/NotoSansHebrew/NotoSansHebrew-${style}.ttf"
# Ubuntu lacks the Latin Extended Additional block (U+1EA0-U+1EF9) used for
# Vietnamese tone marks. Append a Vietnamese-only Ubuntu cut so those glyphs
# are filled from it while every glyph Ubuntu already has stays unchanged
# (fontstack is ordered by descending priority).
viet_path="../builtinFonts/source/Ubuntu/Ubuntu-Vietnamese-${style}.ttf"
output_path="../builtinFonts/${font_name}.h"
python fontconvert.py $font_name $size $font_path $hebrew_path $viet_path \
--additional-intervals 0x05D0,0x05EA > $output_path
echo "Generated $output_path"
generate_ui_font $size $style ""
done
done
for size in ${UI_FONT_SIZES_LARGE[@]}; do
for style in ${UI_FONT_STYLES[@]}; do
generate_ui_font $size $style "--2bit --compress"
done
done