static unsigned char font5x7[] = {
  0x00, 0x00, 0x00, 0x00, 0x00,// (space)
  0x00, 0x00, 0x5F, 0x00, 0x00,// !
  0x00, 0x07, 0x00, 0x07, 0x00,// "
  0x14, 0x7F, 0x14, 0x7F, 0x14,// #
  0x24, 0x2A, 0x7F, 0x2A, 0x12,// $
  0x23, 0x13, 0x08, 0x64, 0x62,// %
  0x36, 0x49, 0x55, 0x22, 0x50,// &
  0x00, 0x05, 0x03, 0x00, 0x00,// '
  0x00, 0x1C, 0x22, 0x41, 0x00,// (
  0x00, 0x41, 0x22, 0x1C, 0x00,// )
  0x08, 0x2A, 0x1C, 0x2A, 0x08,// *
  0x08, 0x08, 0x3E, 0x08, 0x08,// +
  0x00, 0x50, 0x30, 0x00, 0x00,// ,
  0x08, 0x08, 0x08, 0x08, 0x08,// -
  0x00, 0x60, 0x60, 0x00, 0x00,// .
  0x20, 0x10, 0x08, 0x04, 0x02,// /
  0x3E, 0x51, 0x49, 0x45, 0x3E,// 0
  0x00, 0x42, 0x7F, 0x40, 0x00,// 1
  0x42, 0x61, 0x51, 0x49, 0x46,// 2
  0x21, 0x41, 0x45, 0x4B, 0x31,// 3
  0x18, 0x14, 0x12, 0x7F, 0x10,// 4
  0x27, 0x45, 0x45, 0x45, 0x39,// 5
  0x3C, 0x4A, 0x49, 0x49, 0x30,// 6
  0x01, 0x71, 0x09, 0x05, 0x03,// 7
  0x36, 0x49, 0x49, 0x49, 0x36,// 8
  0x06, 0x49, 0x49, 0x29, 0x1E,// 9
  0x00, 0x36, 0x36, 0x00, 0x00,// :
  0x00, 0x56, 0x36, 0x00, 0x00,// ;
  0x00, 0x08, 0x14, 0x22, 0x41,// <
  0x14, 0x14, 0x14, 0x14, 0x14,// =
  0x41, 0x22, 0x14, 0x08, 0x00,// >
  0x02, 0x01, 0x51, 0x09, 0x06,// ?
  0x32, 0x49, 0x79, 0x41, 0x3E,// @
  0x7E, 0x11, 0x11, 0x11, 0x7E,// A
  0x7F, 0x49, 0x49, 0x49, 0x36,// B
  0x3E, 0x41, 0x41, 0x41, 0x22,// C
  0x7F, 0x41, 0x41, 0x22, 0x1C,// D
  0x7F, 0x49, 0x49, 0x49, 0x41,// E
  0x7F, 0x09, 0x09, 0x01, 0x01,// F
  0x3E, 0x41, 0x41, 0x51, 0x32,// G
  0x7F, 0x08, 0x08, 0x08, 0x7F,// H
  0x00, 0x41, 0x7F, 0x41, 0x00,// I
  0x20, 0x40, 0x41, 0x3F, 0x01,// J
  0x7F, 0x08, 0x14, 0x22, 0x41,// K
  0x7F, 0x40, 0x40, 0x40, 0x40,// L
  0x7F, 0x02, 0x04, 0x02, 0x7F,// M
  0x7F, 0x04, 0x08, 0x10, 0x7F,// N
  0x3E, 0x41, 0x41, 0x41, 0x3E,// O
  0x7F, 0x09, 0x09, 0x09, 0x06,// P
  0x3E, 0x41, 0x51, 0x21, 0x5E,// Q
  0x7F, 0x09, 0x19, 0x29, 0x46,// R
  0x46, 0x49, 0x49, 0x49, 0x31,// S
  0x01, 0x01, 0x7F, 0x01, 0x01,// T
  0x3F, 0x40, 0x40, 0x40, 0x3F,// U
  0x1F, 0x20, 0x40, 0x20, 0x1F,// V
  0x7F, 0x20, 0x18, 0x20, 0x7F,// W
  0x63, 0x14, 0x08, 0x14, 0x63,// X
  0x03, 0x04, 0x78, 0x04, 0x03,// Y
  0x61, 0x51, 0x49, 0x45, 0x43,// Z
  0x00, 0x00, 0x7F, 0x41, 0x41,// [
  0x02, 0x04, 0x08, 0x10, 0x20,// "\"
  0x41, 0x41, 0x7F, 0x00, 0x00,// ]
  0x04, 0x02, 0x01, 0x02, 0x04,// ^
  0x40, 0x40, 0x40, 0x40, 0x40,// _
  0x00, 0x01, 0x02, 0x04, 0x00,// `
  0x20, 0x54, 0x54, 0x54, 0x78,// a
  0x7F, 0x48, 0x44, 0x44, 0x38,// b
  0x38, 0x44, 0x44, 0x44, 0x20,// c
  0x38, 0x44, 0x44, 0x48, 0x7F,// d
  0x38, 0x54, 0x54, 0x54, 0x18,// e
  0x08, 0x7E, 0x09, 0x01, 0x02,// f
  0x08, 0x14, 0x54, 0x54, 0x3C,// g
  0x7F, 0x08, 0x04, 0x04, 0x78,// h
  0x00, 0x44, 0x7D, 0x40, 0x00,// i
  0x20, 0x40, 0x44, 0x3D, 0x00,// j
  0x00, 0x7F, 0x10, 0x28, 0x44,// k
  0x00, 0x41, 0x7F, 0x40, 0x00,// l
  0x7C, 0x04, 0x18, 0x04, 0x78,// m
  0x7C, 0x08, 0x04, 0x04, 0x78,// n
  0x38, 0x44, 0x44, 0x44, 0x38,// o
  0x7C, 0x14, 0x14, 0x14, 0x08,// p
  0x08, 0x14, 0x14, 0x18, 0x7C,// q
  0x7C, 0x08, 0x04, 0x04, 0x08,// r
  0x48, 0x54, 0x54, 0x54, 0x20,// s
  0x04, 0x3F, 0x44, 0x40, 0x20,// t
  0x3C, 0x40, 0x40, 0x20, 0x7C,// u
  0x1C, 0x20, 0x40, 0x20, 0x1C,// v
  0x3C, 0x40, 0x30, 0x40, 0x3C,// w
  0x44, 0x28, 0x10, 0x28, 0x44,// x
  0x0C, 0x50, 0x50, 0x50, 0x3C,// y
  0x44, 0x64, 0x54, 0x4C, 0x44,// z
  0x00, 0x08, 0x36, 0x41, 0x00,// {
  0x00, 0x00, 0x7F, 0x00, 0x00,// |
  0x00, 0x41, 0x36, 0x08, 0x00,// }
  0x08, 0x08, 0x2A, 0x1C, 0x08,// ->
  0x08, 0x1C, 0x2A, 0x08, 0x08 // <-
};

static unsigned char numbers4x7[] = {
  0x3E, 0x51, 0x45, 0x3E,// 0
  0x00, 0x42, 0x7F, 0x40,// 1
  0x42, 0x61, 0x49, 0x46,// 2
  0x21, 0x45, 0x4B, 0x31,// 3
  0x18, 0x14, 0x7F, 0x10,// 4
  0x27, 0x45, 0x45, 0x39,// 5
  0x3C, 0x4A, 0x49, 0x30,// 6
  0x01, 0x71, 0x09, 0x05,// 7
  0x36, 0x49, 0x49, 0x36,// 8
  0x06, 0x49, 0x29, 0x1E // 9
};

static unsigned char numbers3x5[] = {
  B01110, B10001, B01110, // 0
  B01000, B11111, B00000, // 1
  B01001, B10011, B01101, // 2
  B10001, B10101, B01010, // 3
  B11100, B00100, B11111, // 4
  B11101, B10101, B10111, // 5
  B01110, B10101, B10110, // 6
  B10000, B10011, B11100, // 7
  B11111, B10101, B11111, // 8
  B11101, B10101, B11111, // 9
};

void drawTextSprite(Window window, unsigned char* sprite, int w, int h, int xPos, int yPos, CRGB color) {
  for (byte y=0; y<h; y++) for (byte x=0; x<w; x++) {
    bool on = (sprite[x]>>(h-1-y)&1)*255;
    if (on) setPixel(window, x+xPos, y+yPos, color);
  }
}

void drawChar(Window window, unsigned char* font, int w, int h, int x, int y, char c, CRGB color) {
  unsigned char* sprite = &font[(c-32)*w];
  drawTextSprite(window, sprite, w, h, x, y, color);
}

void drawDigit(Window window, unsigned char* font, int w, int h, int x, int y, int digit, CRGB color) {
  unsigned char* sprite = &font[digit*w];
  drawTextSprite(window, sprite, w, h, x, y, color);
}

void drawText(Window window, char *font, int w, int h, char *text, int x, int y, CRGB color) {
  for (int i = 0; i < strlen(text); i++) {
    drawChar(window, font5x7, 5, 7, x+i*(w+1), y, text[i], color);
  }
}