See issue https://github.com/lvgl/lv_font_conv/issues/120

[pavmick]

In LVGL export format, avoid storing duplicate bitmap data for identical glyphs. Instead, reference existing bitmap data.

[kisvegabor]

Could you give an example font the parameters for the conversation to test it?

[pavmick]

lv_font_conv --bpp 2 --size 24 --format lvgl --font arial.ttf -r 0x40-0x43 -r 0x410-0x413 -o arial24.c
I did some testing, it's looking good.

[kisvegabor]

Thanks! Working here too:

static const lv_font_fmt_txt_glyph_dsc_t glyph_dsc[] = {
    {.bitmap_index = 0, .adv_w = 0, .box_w = 0, .box_h = 0, .ofs_x = 0, .ofs_y = 0} /* id = 0 reserved */,
    {.bitmap_index = 0, .adv_w = 390, .box_w = 23, .box_h = 23, .ofs_x = 1, .ofs_y = -5},
    {.bitmap_index = 122, .adv_w = 256, .box_w = 18, .box_h = 18, .ofs_x = -1, .ofs_y = 0},
    {.bitmap_index = 191, .adv_w = 256, .box_w = 14, .box_h = 18, .ofs_x = 1, .ofs_y = 0},
    {.bitmap_index = 238, .adv_w = 277, .box_w = 16, .box_h = 18, .ofs_x = 1, .ofs_y = 0},
    {.bitmap_index = 122, .adv_w = 256, .box_w = 18, .box_h = 18, .ofs_x = -1, .ofs_y = 0}, //Reused
    {.bitmap_index = 300, .adv_w = 252, .box_w = 14, .box_h = 18, .ofs_x = 1, .ofs_y = 0},
    {.bitmap_index = 191, .adv_w = 256, .box_w = 14, .box_h = 18, .ofs_x = 1, .ofs_y = 0}, //Reused
    {.bitmap_index = 336, .adv_w = 208, .box_w = 12, .box_h = 18, .ofs_x = 1, .ofs_y = 0}
};

[kisvegabor]

cc @puzrin