Convert a .c font file to a .h headder file (LVLG)

E

el_Samiyel

Member
Hi All,

So I am using LVGl on my teensy 4.1 and I would like to use the data from a font .c file in an unusual way. With the font defined as a .c file, I am unable to change the data within the array (only read from it to draw the font). I previously had this issue with an image.c file however I converted it to a .h file and was able to change the data in the array on the fly. I need to be be able to do the same with this font.c file.

Here is the font.c file:

Code: 
#include "ui.h"

#ifndef UI_FONT_T10
#define UI_FONT_T10 1
#endif

#if UI_FONT_T10

/*-----------------
*    BITMAPS
*----------------*/

/*Store the image of the glyphs*/
static LV_ATTRIBUTE_LARGE_CONST const uint8_t glyph_bitmap[] = {
   /* U+0020 " " */
   0x0,

   /* U+0021 "!" */
   0xff, 0xf1, 0xc0,

   /* U+0022 "\"" */
   0xde, 0xd4,

   /* U+0023 "#" */
   0x77, 0x7f, 0xdd, 0xce, 0xef, 0xfb, 0xb8,

   /* U+0024 "$" */
   0x27, 0xe9, 0xf2, 0xfc, 0x80,

   /* U+0025 "%" */
   0xef, 0xee, 0x3c, 0x77, 0x77, 0xe7,

   /* U+0026 "&" */
   0x44, 0xf4,

   /* U+0027 "'" */
   0xfd, 0x0,

   /* U+0028 "(" */
   0x3b, 0xb8, 0xe7, 0xc,

   /* U+0029 ")" */
   0xe3, 0x8e, 0xe7, 0x60,

   /* U+002A "*" */
   0xc6, 0xd8, 0xe1, 0xc6, 0xd8, 0xc0,

   /* U+002B "+" */
   0x10, 0x4f, 0xc4, 0x10, 0x40,

   /* U+002C "," */
   0xf8,

   /* U+002D "-" */
   0xf8,

   /* U+002E "." */
   0xf0,

   /* U+002F "/" */
   0x2, 0x7, 0x4c, 0xfc, 0x30, 0x20,

   /* U+0030 "0" */
   0xff, 0xff, 0xff, 0xff, 0xf0,

   /* U+0031 "1" */
   0xff, 0xff, 0xc0,

   /* U+0032 "2" */
   0xfc, 0x7f, 0xf8, 0xe3, 0xf0,

   /* U+0033 "3" */
   0xfe, 0x1f, 0xf8, 0x70, 0xff, 0xc0,

   /* U+0034 "4" */
   0xff, 0xff, 0xc7, 0x1c, 0x70,

   /* U+0035 "5" */
   0xff, 0x8f, 0xc7, 0x1f, 0xf0,

   /* U+0036 "6" */
   0xff, 0x8f, 0xff, 0xff, 0xf0,

   /* U+0037 "7" */
   0xfe, 0x1c, 0x38, 0x70, 0xe1, 0xc0,

   /* U+0038 "8" */
   0xff, 0xff, 0xff, 0xff, 0xf0,

   /* U+0039 "9" */
   0xff, 0xff, 0xc7, 0x1f, 0xf0,

   /* U+003A ":" */
   0xf3, 0xc0,

   /* U+003B ";" */
   0x6c, 0x37, 0x80,

   /* U+003C "<" */
   0x37, 0xf7, 0x71,

   /* U+003D "=" */
   0xf8, 0x3e,

   /* U+003E ">" */
   0xce, 0xfe, 0xe8,

   /* U+003F "?" */
   0xf6, 0xce, 0xe0, 0x30,

   /* U+0040 "@" */
   0x1f, 0xfb, 0x22, 0xf8,

   /* U+0041 "A" */
   0x7b, 0xff, 0xff, 0xff, 0xf0,

   /* U+0042 "B" */
   0xff, 0xff, 0xff, 0xff, 0xf0,

   /* U+0043 "C" */
   0xff, 0xc3, 0x87, 0xe, 0xf, 0xc0,

   /* U+0044 "D" */
   0xff, 0xff, 0xff, 0xff, 0xe0,

   /* U+0045 "E" */
   0xff, 0xc3, 0xf7, 0xe, 0x1f, 0xc0,

   /* U+0046 "F" */
   0xff, 0xc3, 0xf7, 0xe, 0x1c, 0x0,

   /* U+0047 "G" */
   0xff, 0x8f, 0xff, 0xfd, 0xf0,

   /* U+0048 "H" */
   0xff, 0xff, 0xff, 0xff, 0xf0,

   /* U+0049 "I" */
   0xfb, 0x9c, 0xe7, 0x7c,

   /* U+004A "J" */
   0x1c, 0x71, 0xff, 0xfd, 0xf0,

   /* U+004B "K" */
   0xff, 0xff, 0xbe, 0xff, 0xf0,

   /* U+004C "L" */
   0xe1, 0xc3, 0x87, 0xe, 0x1f, 0xc0,

   /* U+004D "M" */
   0xe3, 0xfb, 0xff, 0xfd, 0x7e, 0x3f, 0x1c,

   /* U+004E "N" */
   0xff, 0xff, 0xff, 0xff, 0xf0,

   /* U+004F "O" */
   0xff, 0xff, 0xff, 0xfd, 0xe0,

   /* U+0050 "P" */
   0xfb, 0xff, 0xf8, 0xe3, 0x80,

   /* U+0051 "Q" */
   0xff, 0xff, 0xff, 0xf9, 0xf0,

   /* U+0052 "R" */
   0xff, 0xff, 0xbe, 0xff, 0xf0,

   /* U+0053 "S" */
   0x7f, 0x8f, 0x87, 0x1f, 0xe0,

   /* U+0054 "T" */
   0xfc, 0xe3, 0x8e, 0x38, 0xe0,

   /* U+0055 "U" */
   0xff, 0xff, 0xff, 0xfd, 0xe0,

   /* U+0056 "V" */
   0xff, 0xff, 0xff, 0xfb, 0xc0,

   /* U+0057 "W" */
   0xe3, 0xf1, 0xff, 0xff, 0xff, 0x7f, 0x1c,

   /* U+0058 "X" */
   0xff, 0xf7, 0xdf, 0xff, 0xf0,

   /* U+0059 "Y" */
   0xff, 0xf7, 0xce, 0x38, 0xe0,

   /* U+005A "Z" */
   0xfe, 0x3c, 0xe3, 0xce, 0x1f, 0xc0,

   /* U+005B "[" */
   0xfe, 0xee, 0xef,

   /* U+005C "\\" */
   0x38, 0x38, 0xff, 0xff, 0x38, 0x38, 0x38,

   /* U+005D "]" */
   0xf7, 0x77, 0x7f,

   /* U+005E "^" */
   0x67, 0xbe,

   /* U+005F "_" */
   0xfc,

   /* U+0060 "`" */
   0x1f, 0xf, 0xef, 0x9b, 0xb1, 0x84, 0x84, 0xfc,

   /* U+0061 "a" */
   0xfe, 0x1f, 0xff, 0x77, 0xe0,

   /* U+0062 "b" */
   0xe3, 0xef, 0xff, 0xff, 0xf0,

   /* U+0063 "c" */
   0x7f, 0xc3, 0x87, 0xf, 0xe0,

   /* U+0064 "d" */
   0x1d, 0xff, 0xff, 0xff, 0xf0,

   /* U+0065 "e" */
   0x7d, 0xdf, 0xff, 0xf, 0xe0,

   /* U+0066 "f" */
   0x7f, 0x3f, 0xce, 0x70,

   /* U+0067 "g" */
   0x7b, 0xff, 0xff, 0xfd, 0xf0,

   /* U+0068 "h" */
   0xe3, 0xef, 0xff, 0xff, 0xf0,

   /* U+0069 "i" */
   0xe3, 0xff, 0xc0,

   /* U+006A "j" */
   0x77, 0x77, 0x77, 0xe0,

   /* U+006B "k" */
   0xe3, 0xff, 0xbe, 0xff, 0xf0,

   /* U+006C "l" */
   0xff, 0xff, 0xc0,

   /* U+006D "m" */
   0xff, 0x7f, 0xff, 0xff, 0xff, 0xf8,

   /* U+006E "n" */
   0xfb, 0xff, 0xff, 0xfc,

   /* U+006F "o" */
   0x7b, 0xff, 0xff, 0xfc,

   /* U+0070 "p" */
   0xff, 0xff, 0xff, 0xfb, 0x80,

   /* U+0071 "q" */
   0xff, 0xff, 0xff, 0x7c, 0x70,

   /* U+0072 "r" */
   0x7f, 0xc3, 0x87, 0xe, 0x0,

   /* U+0073 "s" */
   0x7f, 0xc1, 0xf8, 0x7f, 0xc0,

   /* U+0074 "t" */
   0xe7, 0xf9, 0xce, 0x3c,

   /* U+0075 "u" */
   0xff, 0xff, 0xff, 0x7c,

   /* U+0076 "v" */
   0xff, 0xff, 0xfe, 0xf8,

   /* U+0077 "w" */
   0xff, 0xff, 0xff, 0xff, 0xf7, 0xf0,

   /* U+0078 "x" */
   0xfd, 0xf3, 0xdf, 0xfc,

   /* U+0079 "y" */
   0xff, 0xff, 0xff, 0x7d, 0xf0,

   /* U+007A "z" */
   0xfc, 0xe3, 0x9c, 0xfc,

   /* U+007B "{" */
   0x30, 0xc7, 0xbf,

   /* U+007C "|" */
   0xff, 0x80,

   /* U+007D "}" */
   0xfd, 0xe3, 0xc,

   /* U+007E "~" */
   0x6d, 0x7d, 0xb0
};


/*---------------------
*  GLYPH DESCRIPTION
*--------------------*/

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 = 50, .box_w = 1, .box_h = 1, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 1, .adv_w = 50, .box_w = 3, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 4, .adv_w = 90, .box_w = 5, .box_h = 3, .ofs_x = 0, .ofs_y = 3},
   {.bitmap_index = 6, .adv_w = 150, .box_w = 9, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 13, .adv_w = 100, .box_w = 5, .box_h = 7, .ofs_x = 1, .ofs_y = -1},
   {.bitmap_index = 18, .adv_w = 130, .box_w = 8, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 24, .adv_w = 90, .box_w = 4, .box_h = 4, .ofs_x = 1, .ofs_y = 1},
   {.bitmap_index = 26, .adv_w = 50, .box_w = 3, .box_h = 3, .ofs_x = 0, .ofs_y = 3},
   {.bitmap_index = 28, .adv_w = 80, .box_w = 5, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 32, .adv_w = 80, .box_w = 5, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 36, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 42, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 47, .adv_w = 40, .box_w = 2, .box_h = 3, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 48, .adv_w = 90, .box_w = 5, .box_h = 1, .ofs_x = 0, .ofs_y = 3},
   {.bitmap_index = 49, .adv_w = 40, .box_w = 2, .box_h = 2, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 50, .adv_w = 130, .box_w = 8, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 56, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 61, .adv_w = 50, .box_w = 3, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 64, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 69, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 75, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 80, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 85, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 90, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 96, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 101, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 106, .adv_w = 40, .box_w = 2, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 108, .adv_w = 40, .box_w = 3, .box_h = 6, .ofs_x = -1, .ofs_y = -1},
   {.bitmap_index = 111, .adv_w = 80, .box_w = 4, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 114, .adv_w = 90, .box_w = 5, .box_h = 3, .ofs_x = 0, .ofs_y = 2},
   {.bitmap_index = 116, .adv_w = 100, .box_w = 4, .box_h = 6, .ofs_x = 2, .ofs_y = 0},
   {.bitmap_index = 119, .adv_w = 100, .box_w = 5, .box_h = 6, .ofs_x = 1, .ofs_y = 0},
   {.bitmap_index = 123, .adv_w = 100, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 1},
   {.bitmap_index = 127, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 132, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 137, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 143, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 148, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 154, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 160, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 165, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 170, .adv_w = 100, .box_w = 5, .box_h = 6, .ofs_x = 1, .ofs_y = 0},
   {.bitmap_index = 174, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 179, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 184, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 190, .adv_w = 150, .box_w = 9, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 197, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 202, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 207, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 212, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 217, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 222, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 227, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 232, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 237, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 242, .adv_w = 150, .box_w = 9, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 249, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 254, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 259, .adv_w = 110, .box_w = 7, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 265, .adv_w = 70, .box_w = 4, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 268, .adv_w = 130, .box_w = 8, .box_h = 7, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 275, .adv_w = 70, .box_w = 4, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 278, .adv_w = 100, .box_w = 5, .box_h = 3, .ofs_x = 1, .ofs_y = 4},
   {.bitmap_index = 280, .adv_w = 110, .box_w = 6, .box_h = 1, .ofs_x = 0, .ofs_y = -2},
   {.bitmap_index = 281, .adv_w = 130, .box_w = 8, .box_h = 8, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 289, .adv_w = 110, .box_w = 7, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 294, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 299, .adv_w = 110, .box_w = 7, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 304, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 309, .adv_w = 110, .box_w = 7, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 314, .adv_w = 80, .box_w = 5, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 318, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 323, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 328, .adv_w = 60, .box_w = 3, .box_h = 6, .ofs_x = 1, .ofs_y = 0},
   {.bitmap_index = 331, .adv_w = 70, .box_w = 4, .box_h = 7, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 335, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 340, .adv_w = 50, .box_w = 3, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 343, .adv_w = 150, .box_w = 9, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 349, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 353, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 357, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 362, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 367, .adv_w = 110, .box_w = 7, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 372, .adv_w = 110, .box_w = 7, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 377, .adv_w = 80, .box_w = 5, .box_h = 6, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 381, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 385, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 389, .adv_w = 150, .box_w = 9, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 395, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 399, .adv_w = 110, .box_w = 6, .box_h = 6, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 404, .adv_w = 110, .box_w = 6, .box_h = 5, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 408, .adv_w = 110, .box_w = 6, .box_h = 4, .ofs_x = 0, .ofs_y = 1},
   {.bitmap_index = 411, .adv_w = 30, .box_w = 1, .box_h = 9, .ofs_x = 0, .ofs_y = -1},
   {.bitmap_index = 413, .adv_w = 110, .box_w = 6, .box_h = 4, .ofs_x = 0, .ofs_y = 0},
   {.bitmap_index = 416, .adv_w = 110, .box_w = 7, .box_h = 3, .ofs_x = 0, .ofs_y = 2}
};

/*---------------------
*  CHARACTER MAPPING
*--------------------*/



/*Collect the unicode lists and glyph_id offsets*/
static const lv_font_fmt_txt_cmap_t cmaps[] =
{
   {
       .range_start = 32, .range_length = 95, .glyph_id_start = 1,
       .unicode_list = NULL, .glyph_id_ofs_list = NULL, .list_length = 0, .type = LV_FONT_FMT_TXT_CMAP_FORMAT0_TINY
   }
};



/*--------------------
*  ALL CUSTOM DATA
*--------------------*/

#if LV_VERSION_CHECK(8, 0, 0)
/*Store all the custom data of the font*/
static  lv_font_fmt_txt_glyph_cache_t cache;
static const lv_font_fmt_txt_dsc_t font_dsc = {
#else
static lv_font_fmt_txt_dsc_t font_dsc = {
#endif
   .glyph_bitmap = glyph_bitmap,
   .glyph_dsc = glyph_dsc,
   .cmaps = cmaps,
   .kern_dsc = NULL,
   .kern_scale = 0,
   .cmap_num = 1,
   .bpp = 1,
   .kern_classes = 0,
   .bitmap_format = 0,
#if LV_VERSION_CHECK(8, 0, 0)
   .cache = &cache
#endif
};


/*-----------------
*  PUBLIC FONT
*----------------*/

/*Initialize a public general font descriptor*/
#if LV_VERSION_CHECK(8, 0, 0)
const lv_font_t ui_font_t10 = {
#else
lv_font_t ui_font_t10 = {
#endif
   .get_glyph_dsc = lv_font_get_glyph_dsc_fmt_txt,    /*Function pointer to get glyph's data*/
   .get_glyph_bitmap = lv_font_get_bitmap_fmt_txt,    /*Function pointer to get glyph's bitmap*/
   .line_height = 10,          /*The maximum line height required by the font*/
   .base_line = 2,             /*Baseline measured from the bottom of the line*/
#if !(LVGL_VERSION_MAJOR == 6 && LVGL_VERSION_MINOR == 0)
   .subpx = LV_FONT_SUBPX_NONE,
#endif
#if LV_VERSION_CHECK(7, 4, 0) || LVGL_VERSION_MAJOR >= 8
   .underline_position = -1,
   .underline_thickness = 0,
#endif
   .dsc = &font_dsc           /*The custom font data. Will be accessed by `get_glyph_bitmap/dsc` */
};



#endif /*#if UI_FONT_T10*/

Here is how I sucessfully managed to convert an image.c to an image.h file (only by answers provided on the Internet by someone who managed to do it before):

Original image.c

Code: 
#include "ui.h"

#ifndef LV_ATTRIBUTE_MEM_ALIGN
    #define LV_ATTRIBUTE_MEM_ALIGN
#endif

// IMAGE DATA: assets\comp.png
const LV_ATTRIBUTE_MEM_ALIGN uint8_t ui_img_comp_png_data[] = {
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    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
const lv_img_dsc_t ui_img_comp_png = {
    .header.always_zero = 0,
    .header.w = 30,
    .header.h = 30,
    .data_size = sizeof(ui_img_comp_png_data),
    .header.cf = LV_IMG_CF_TRUE_COLOR_ALPHA,
    .data = ui_img_comp_png_data
};

My image.c conversion to image.h

Code: 
byte ui_img_comp_png_data[] = {
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    0x00, 0x00, 0x36, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x5F, 0x00, 0x00, 0xDA, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x8C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x00, 0x00, 0xF9, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xDD, 0x00, 0x00, 0x83, 0x00, 0x00, 0x3A, 0x00, 0x00, 0x20, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x1C, 0x00, 0x00, 0x1F, 0x00, 0x00, 0x37, 0x00, 0x00, 0x7B, 0x00, 0x00, 0xD8, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFE, 0x00, 0x00, 0x82, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0xD0, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFB, 0x00, 0x00, 0xF4, 0x00, 0x00, 0xF4, 0x00, 0x00, 0xFA, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF,
    0x00, 0x00, 0xD9, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x5F, 0x00, 0x00, 0xCB, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xD1, 0x00, 0x00, 0x65, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x40, 0x00, 0x00, 0x83, 0x00, 0x00, 0xAA, 0x00, 0x00, 0xCB, 0x00, 0x00, 0xE8, 0x00, 0x00, 0xE9, 0x00, 0x00, 0xCD, 0x00, 0x00, 0xAC, 0x00, 0x00, 0x87, 0x00, 0x00, 0x45, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
const lv_img_dsc_t ui_img_comp_png = {
    LV_IMG_CF_TRUE_COLOR_ALPHA,
    0,
    2,
    30,
    30,
    sizeof(ui_img_comp_png_data),
  
    ui_img_comp_png_data,
};

I have obviously posted on the LVGL forum, but trying here as I generally get better responses and there seems to be more competent software devs on here with the experience I can draw from (I never fully learnt to code proficiently, but always managed to hack things together and make them work). Any pointers will be most appreciated.
 
Last edited:
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