AdafruitGFX: Help for editing one of the font files.

siriusbg · June 16, 2016, 11:50am

Hello to everyone!
I need help editing one of the font files. I want to use only the numeric values(0-9) and to remove the rest of the buffer for memory purposes. I'm not so advanced, so any help will be much appreciated.

Thanks in advance and sorry for my bad english!

david_prentice · June 16, 2016, 12:32pm

Which Font file?

David.

siriusbg · June 16, 2016, 12:44pm

The file is: FreeSerifBold24pt7b
Sorry, forgot about this important piece of information.

david_prentice · June 16, 2016, 1:09pm

const uint8_t FreeSerifBoldNum24pt7bBitmaps[] PROGMEM = {
  0x00, 0xFC, 0x00,
  0x0F, 0x3C, 0x00, 0x78, 0x78, 0x03, 0xE1, 0xF0, 0x1F, 0x03, 0xE0, 0x7C,
  0x0F, 0x83, 0xF0, 0x3F, 0x0F, 0xC0, 0xFC, 0x7F, 0x03, 0xF9, 0xFC, 0x0F,
  0xE7, 0xF0, 0x3F, 0xBF, 0xC0, 0xFE, 0xFF, 0x03, 0xFF, 0xFC, 0x0F, 0xFF,
  0xF0, 0x3F, 0xFF, 0xC0, 0xFF, 0xFF, 0x03, 0xFF, 0xFC, 0x0F, 0xFF, 0xF0,
  0x3F, 0xFF, 0xC0, 0xFF, 0xFF, 0x03, 0xFF, 0xFC, 0x0F, 0xFF, 0xF0, 0x3F,
  0x9F, 0xC0, 0xFE, 0x7F, 0x03, 0xF9, 0xFC, 0x0F, 0xE3, 0xF0, 0x3F, 0x0F,
  0xC0, 0xFC, 0x1F, 0x03, 0xE0, 0x7C, 0x0F, 0x80, 0xF8, 0x7C, 0x01, 0xE1,
  0xE0, 0x03, 0xCF, 0x00, 0x03, 0xF0, 0x00, 0x00, 0x18, 0x00, 0x1E, 0x00,
  0x1F, 0x80, 0x1F, 0xE0, 0x1F, 0xF8, 0x1D, 0xFE, 0x00, 0x3F, 0x80, 0x0F,
  0xE0, 0x03, 0xF8, 0x00, 0xFE, 0x00, 0x3F, 0x80, 0x0F, 0xE0, 0x03, 0xF8,
  0x00, 0xFE, 0x00, 0x3F, 0x80, 0x0F, 0xE0, 0x03, 0xF8, 0x00, 0xFE, 0x00,
  0x3F, 0x80, 0x0F, 0xE0, 0x03, 0xF8, 0x00, 0xFE, 0x00, 0x3F, 0x80, 0x0F,
  0xE0, 0x03, 0xF8, 0x00, 0xFE, 0x00, 0x3F, 0x80, 0x0F, 0xE0, 0x03, 0xF8,
  0x00, 0xFE, 0x00, 0x7F, 0x80, 0x3F, 0xF8, 0xFF, 0xFF, 0xC0, 0x00, 0xFC,
  0x00, 0x1F, 0xF8, 0x03, 0xFF, 0xE0, 0x3F, 0xFF, 0x81, 0xFF, 0xFC, 0x1C,
  0x1F, 0xF1, 0xC0, 0x7F, 0x8C, 0x01, 0xFC, 0x40, 0x0F, 0xE0, 0x00, 0x3F,
  0x00, 0x01, 0xF8, 0x00, 0x0F, 0xC0, 0x00, 0x7C, 0x00, 0x03, 0xE0, 0x00,
  0x3E, 0x00, 0x01, 0xF0, 0x00, 0x0F, 0x00, 0x00, 0xF0, 0x00, 0x07, 0x00,
  0x00, 0x70, 0x00, 0x07, 0x80, 0x00, 0x38, 0x00, 0x03, 0x80, 0x00, 0x38,
  0x01, 0x03, 0x80, 0x18, 0x38, 0x00, 0x81, 0x80, 0x1C, 0x1F, 0xFF, 0xE1,
  0xFF, 0xFF, 0x1F, 0xFF, 0xF9, 0xFF, 0xFF, 0x9F, 0xFF, 0xFC, 0xFF, 0xFF,
  0xE0, 0x00, 0xFE, 0x00, 0x3F, 0xFC, 0x03, 0xFF, 0xF0, 0x30, 0xFF, 0xC2,
  0x01, 0xFE, 0x30, 0x0F, 0xF1, 0x00, 0x3F, 0x80, 0x01, 0xFC, 0x00, 0x0F,
  0xE0, 0x00, 0x7E, 0x00, 0x03, 0xF0, 0x00, 0x3F, 0x00, 0x01, 0xF0, 0x00,
  0x1F, 0xC0, 0x03, 0xFF, 0x00, 0x3F, 0xFC, 0x00, 0x7F, 0xF0, 0x00, 0xFF,
  0x80, 0x03, 0xFE, 0x00, 0x0F, 0xF0, 0x00, 0x3F, 0x80, 0x00, 0xFC, 0x00,
  0x07, 0xE0, 0x00, 0x1F, 0x00, 0x00, 0xF8, 0x00, 0x07, 0x80, 0x00, 0x3C,
  0x00, 0x01, 0xC7, 0x80, 0x0E, 0x7F, 0x00, 0xE3, 0xFC, 0x06, 0x1F, 0xF8,
  0xE0, 0x7F, 0xFC, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x03, 0xC0, 0x00, 0x1E,
  0x00, 0x01, 0xF0, 0x00, 0x1F, 0x80, 0x01, 0xFC, 0x00, 0x0F, 0xE0, 0x00,
  0xFF, 0x00, 0x0D, 0xF8, 0x00, 0xEF, 0xC0, 0x06, 0x7E, 0x00, 0x63, 0xF0,
  0x07, 0x1F, 0x80, 0x30, 0xFC, 0x03, 0x07, 0xE0, 0x38, 0x3F, 0x03, 0x81,
  0xF8, 0x18, 0x0F, 0xC1, 0xC0, 0x7E, 0x1C, 0x03, 0xF0, 0xC0, 0x1F, 0x8E,
  0x00, 0xFC, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xC0, 0x03, 0xF0, 0x00, 0x1F, 0x80, 0x00, 0xFC, 0x00,
  0x07, 0xE0, 0x00, 0x3F, 0x00, 0x01, 0xF8, 0x00, 0x0F, 0xC0, 0x07, 0xFF,
  0xF0, 0x7F, 0xFF, 0x0F, 0xFF, 0xE0, 0xFF, 0xFE, 0x0F, 0xFF, 0xE1, 0xFF,
  0xFC, 0x18, 0x00, 0x01, 0x80, 0x00, 0x18, 0x00, 0x03, 0x00, 0x00, 0x3F,
  0x80, 0x03, 0xFF, 0x80, 0x7F, 0xFE, 0x07, 0xFF, 0xF0, 0x7F, 0xFF, 0x87,
  0xFF, 0xFC, 0x7F, 0xFF, 0xC0, 0x07, 0xFC, 0x00, 0x1F, 0xE0, 0x00, 0x7E,
  0x00, 0x03, 0xE0, 0x00, 0x1E, 0x00, 0x00, 0xE0, 0x00, 0x0E, 0x00, 0x00,
  0xC0, 0x00, 0x0C, 0x78, 0x00, 0x8F, 0xE0, 0x18, 0xFF, 0x87, 0x0F, 0xFF,
  0xE0, 0x7F, 0xF8, 0x01, 0xFE, 0x00, 0x00, 0x00, 0x38, 0x00, 0x1F, 0x00,
  0x07, 0xE0, 0x00, 0x7C, 0x00, 0x0F, 0xC0, 0x00, 0xFC, 0x00, 0x0F, 0xC0,
  0x00, 0xFC, 0x00, 0x0F, 0xE0, 0x00, 0xFE, 0x00, 0x0F, 0xF0, 0x00, 0x7F,
  0x00, 0x07, 0xF8, 0x00, 0x3F, 0xFF, 0x01, 0xFF, 0xFE, 0x1F, 0xF1, 0xFC,
  0xFF, 0x07, 0xE7, 0xF8, 0x3F, 0xBF, 0xC1, 0xFD, 0xFE, 0x07, 0xFF, 0xF0,
  0x3F, 0xFF, 0x81, 0xFF, 0xFC, 0x0F, 0xFF, 0xE0, 0x7F, 0xFF, 0x03, 0xFB,
  0xF8, 0x1F, 0xDF, 0xC0, 0xFE, 0xFE, 0x07, 0xE3, 0xF0, 0x3F, 0x1F, 0xC1,
  0xF0, 0x7E, 0x0F, 0x01, 0xF0, 0xF8, 0x03, 0xC7, 0x00, 0x07, 0xE0, 0x00,
  0x3F, 0xFF, 0xF9, 0xFF, 0xFF, 0xDF, 0xFF, 0xFE, 0xFF, 0xFF, 0xE7, 0xFF,
  0xFF, 0x3F, 0xFF, 0xF9, 0x80, 0x07, 0x98, 0x00, 0x3C, 0xC0, 0x03, 0xE4,
  0x00, 0x1E, 0x00, 0x00, 0xF0, 0x00, 0x0F, 0x00, 0x00, 0x78, 0x00, 0x03,
  0xC0, 0x00, 0x3C, 0x00, 0x01, 0xE0, 0x00, 0x0F, 0x00, 0x00, 0xF0, 0x00,
  0x07, 0x80, 0x00, 0x7C, 0x00, 0x03, 0xC0, 0x00, 0x1E, 0x00, 0x01, 0xF0,
  0x00, 0x0F, 0x00, 0x00, 0x78, 0x00, 0x07, 0xC0, 0x00, 0x3C, 0x00, 0x01,
  0xE0, 0x00, 0x1F, 0x00, 0x00, 0xF0, 0x00, 0x0F, 0x80, 0x00, 0x7C, 0x00,
  0x01, 0xFE, 0x00, 0x38, 0x7C, 0x07, 0x80, 0xF0, 0x78, 0x07, 0xC3, 0xC0,
  0x1F, 0x3E, 0x00, 0xF9, 0xF0, 0x07, 0xCF, 0xC0, 0x3E, 0x7E, 0x01, 0xF3,
  0xF8, 0x0F, 0x1F, 0xE0, 0xF8, 0x7F, 0xC7, 0x83, 0xFF, 0xF0, 0x0F, 0xFE,
  0x00, 0x7F, 0xFC, 0x01, 0xFF, 0xF0, 0x03, 0xFF, 0xC0, 0x1F, 0xFF, 0x03,
  0xBF, 0xFC, 0x7C, 0x7F, 0xE7, 0xC1, 0xFF, 0x3E, 0x07, 0xFF, 0xE0, 0x1F,
  0xFF, 0x00, 0x7F, 0xF8, 0x03, 0xFF, 0xC0, 0x0F, 0xFE, 0x00, 0x7F, 0xF0,
  0x03, 0xE7, 0x80, 0x1F, 0x3E, 0x01, 0xF0, 0xF8, 0x0F, 0x83, 0xE1, 0xF8,
  0x0F, 0xFF, 0x00, 0x1F, 0xE0, 0x00, 0x01, 0xFC, 0x00, 0x1C, 0x3C, 0x00,
  0xF0, 0x78, 0x07, 0x81, 0xF8, 0x3E, 0x07, 0xE1, 0xF8, 0x0F, 0xC7, 0xE0,
  0x3F, 0x3F, 0x80, 0xFE, 0xFE, 0x03, 0xFB, 0xF8, 0x0F, 0xFF, 0xE0, 0x3F,
  0xFF, 0x80, 0xFF, 0xFE, 0x03, 0xFF, 0xF8, 0x0F, 0xFF, 0xE0, 0x3F, 0xDF,
  0xC0, 0xFF, 0x7F, 0x03, 0xFC, 0xFC, 0x0F, 0xF3, 0xFC, 0x7F, 0x83, 0xFF,
  0xFE, 0x07, 0xF7, 0xF8, 0x00, 0x1F, 0xC0, 0x00, 0xFF, 0x00, 0x03, 0xF8,
  0x00, 0x1F, 0xE0, 0x00, 0x7F, 0x00, 0x03, 0xF8, 0x00, 0x0F, 0xC0, 0x00,
  0x7E, 0x00, 0x03, 0xF0, 0x00, 0x3F, 0x00, 0x01, 0xF0, 0x00, 0x3F, 0x00,
  0x03, 0x80, 0x00, 0x00, 
};

const GFXglyph FreeSerifBoldNum24pt7bGlyphs[] PROGMEM = {
  {   909-909,  22,  34,  23,    1,  -32 },   // 0x30 '0'
  {  1003-909,  18,  33,  23,    3,  -32 },   // 0x31 '1'
  {  1078-909,  21,  33,  24,    1,  -32 },   // 0x32 '2'
  {  1165-909,  21,  34,  24,    1,  -32 },   // 0x33 '3'
  {  1255-909,  21,  33,  24,    1,  -32 },   // 0x34 '4'
  {  1342-909,  20,  32,  23,    2,  -31 },   // 0x35 '5'
  {  1422-909,  21,  34,  24,    1,  -32 },   // 0x36 '6'
  {  1512-909,  21,  32,  23,    1,  -31 },   // 0x37 '7'
  {  1596-909,  21,  34,  23,    1,  -32 },   // 0x38 '8'
  {  1686-909,  22,  34,  23,    1,  -32 },   // 0x39 '9'
}; 

const GFXfont FreeSerifBoldNum24pt7b PROGMEM = {
  (uint8_t  *)FreeSerifBoldNum24pt7bBitmaps,
  (GFXglyph *)FreeSerifBoldNum24pt7bGlyphs,
  0x30, 0x39, 56 };

// Approx. much less bytes

Untested. You can see the "new" font name. Save it in the Fonts directory. Tell us whether it works.

David.

Edit. Corrected typo on 3rd to last line: FreeSerifBold2Num4pt7bGlyphs
Edit2. Removed one of the 0x00 from the first line.

I have actually tested it and the edited version works.

siriusbg · June 16, 2016, 1:59pm

That was fast! Thanks David! Will test it tonight and will reply.

david_prentice · June 16, 2016, 2:09pm

For the benefit of anyone else who wants to hand-edit.

Identify start of '0' entry from the Glyphs table = 909
Identify start of ':' entry i.e. end of '9' = 1780
Bitfields start at line 2 with 12 bytes per line.
909/12 = 75.75 i.e. line 77 field 9
1780/12 = 148.33 i.e. line 150 field 4
Delete lines 151- from the bitfields table
Delete lines 2-149
Delete the part fields.
Edit the Glyphs table. Just leave the 0 to 9 entries.
Edit the GFXfont table to reflect new size and names.

It is not difficult, but since I made two errors you have to be careful.
In other words, I should have tested before posting.

Anyway, I was downstairs drinking a cup of tea. Thought that I should show how to hand-edit.
In practice, you would auto generate the Font with the utility program. i.e. choose size and name.
No typos if you do it that way!

siriusbg · June 16, 2016, 4:03pm

Tested and it works! Thank you again...and for the edit info.

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AdafruitGFX: Help for editing one of the font files.

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