Font rendering demo in SDL2

demo.c

// Font rendering demo
// $ cc -o demo demo.c $(sdl2-config --cflags --libs)
// Ref: https://old.reddit.com/r/C_Programming/comments/13ga82a
// This is free and unencumbered software released into the public domain.
#include "SDL.h"

// https://itch.io/jam/lowrezjam2016/topic/19413/minimal-sprite-font-with-upperlower-cases-cleanreadable
#define FONTW 72
#define FONTH 143
#define CHARW 9
#define CHARH 11
static Uint8 fontqoi[] = {
  0x71, 0x6f, 0x69, 0x66, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x8f,
  0x04, 0x00, 0xff, 0xff, 0x00, 0xff, 0x00, 0xfd, 0xfd, 0xd2, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xc1, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26,
  0xc0, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc0, 0x36,
  0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0x36, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xfd, 0xec, 0x26, 0x36, 0xc7,
  0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0xc2, 0x36, 0xc3, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0xc0, 0x36,
  0xc5, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36,
  0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5,
  0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xfd, 0xee, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc0,
  0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26,
  0x36, 0xc3, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26,
  0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26,
  0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc0, 0x36,
  0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36,
  0xc5, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26, 0xc3, 0x36, 0xc2,
  0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xfd, 0xe3,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xcd, 0x26, 0x36, 0xd1,
  0x26, 0x36, 0xce, 0x26, 0xc0, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0xcd, 0x26, 0x36, 0xd1, 0x26, 0x36, 0xce, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5,
  0x26, 0x36, 0xc7, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc6, 0x26, 0xc1, 0x36,
  0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xfd,
  0xed, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc7, 0x26,
  0x36, 0xc5, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xd8, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xd8, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xd8, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0xc3, 0x36,
  0xc2, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc5,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc6, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xe0,
  0x26, 0x36, 0xfd, 0xc6, 0x26, 0xc0, 0x36, 0xfd, 0xfd, 0xfd, 0xfd, 0xf7,
  0x26, 0x36, 0xd7, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc7, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc8, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0xc1, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5, 0x26,
  0x36, 0xce, 0x26, 0x36, 0xc8, 0x26, 0x36, 0xfa, 0x26, 0x36, 0xc8, 0x26,
  0x36, 0xfd, 0xfd, 0xfd, 0xeb, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xc5,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xe8, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0xc0, 0x36, 0xc7, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0x26, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc5, 0x26,
  0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc4, 0x26, 0x36,
  0x26, 0x36, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc8, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36,
  0xc2, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0xc8, 0x26, 0x36, 0xc4, 0x26, 0xc3, 0x36, 0xc2, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36,
  0xc5, 0x26, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xd8,
  0x26, 0x36, 0xfd, 0xc5, 0x26, 0xc1, 0x36, 0xfd, 0xfd, 0xfd, 0xc7, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xd6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc8, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xd6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc8, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xd6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36,
  0xc5, 0x26, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xd6,
  0x26, 0xc1, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc5, 0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xd8, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc6, 0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xd8, 0x26, 0x36, 0xc4,
  0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36,
  0xfd, 0xc6, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xf6, 0x26, 0xc0, 0x36, 0xc5,
  0x26, 0x36, 0xd9, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36,
  0xd7, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xd8, 0x26, 0x36, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc8, 0x26,
  0x36, 0xc4, 0x26, 0x36, 0xe1, 0x26, 0xc3, 0x36, 0xd5, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xe2, 0x26, 0x36, 0x26, 0x36, 0xd6, 0x26, 0x36, 0xc5, 0x26,
  0x36, 0xc6, 0x26, 0xc1, 0x36, 0xd6, 0x26, 0xc3, 0x36, 0xfd, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0xcf, 0x26, 0xc1, 0x36, 0xce, 0x26, 0x36, 0x26, 0x36,
  0xc3, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xf7, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0xc6, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26, 0xc0, 0x36, 0xc4,
  0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0xc6, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26,
  0x36, 0xc5, 0x26, 0x36, 0xd8, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc7, 0x26,
  0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xd9, 0x26,
  0x36, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xd8, 0x26, 0x36, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xd8, 0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc7, 0x26,
  0x36, 0xc5, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xd9, 0x26,
  0x36, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xe2, 0x26, 0x36, 0xc5, 0x26, 0x36,
  0xc6, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0x36, 0xfd,
  0xd0, 0x26, 0x36, 0xfd, 0xc8, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc9, 0x26,
  0x36, 0xc5, 0x26, 0xc1, 0x36, 0xef, 0x26, 0x36, 0xc9, 0x26, 0x36, 0xc4,
  0x26, 0x36, 0xc1, 0x26, 0x36, 0xc2, 0x26, 0x36, 0xea, 0x26, 0x36, 0xc7,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0xc0, 0x26, 0x36, 0xc0, 0x26, 0x36, 0xc0,
  0x26, 0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xcf, 0x26, 0x36, 0xce, 0x26,
  0x36, 0xc7, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc1, 0x26, 0x36, 0x26, 0x36,
  0xc1, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0x26, 0x36, 0xcd, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5,
  0x26, 0x36, 0xc0, 0x26, 0xc0, 0x36, 0x26, 0x36, 0xc9, 0x26, 0xc3, 0x36,
  0xcc, 0x26, 0xc1, 0x36, 0xce, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc5, 0x26,
  0x36, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xcb, 0x26, 0x36, 0xc4, 0x26,
  0xc1, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xce, 0x26, 0x36,
  0xc3, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc0, 0x26, 0xc2, 0x36, 0xcb, 0x26,
  0x36, 0xcf, 0x26, 0x36, 0xd0, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc7, 0x26,
  0x36, 0xfd, 0xc8, 0x26, 0xc2, 0x36, 0xfd, 0xfd, 0xfa, 0x26, 0x36, 0xea,
  0x26, 0x36, 0xc1, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc5,
  0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xd6,
  0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc3, 0x26, 0x36, 0xc6, 0x26, 0x36,
  0xc5, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc8, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc0, 0x26, 0x36, 0xd4, 0x26, 0x36,
  0xc6, 0x26, 0x36, 0xc6, 0x26, 0xc0, 0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0xc8, 0x26, 0x36, 0xc3, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36,
  0xc5, 0x26, 0x36, 0xc5, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0xc8, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc5, 0x26, 0x36, 0xc4, 0x26,
  0x36, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc4, 0x26, 0x36, 0xc6, 0x26, 0xc0,
  0x36, 0xc6, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc7, 0x26, 0x36, 0xc0, 0x26,
  0x36, 0xc1, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc6, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xc8, 0x26, 0x36, 0xc4, 0x26, 0x36,
  0xc8, 0x26, 0x36, 0x26, 0x36, 0x26, 0x36, 0xc0, 0x26, 0x36, 0x26, 0x36,
  0xc4, 0x26, 0x36, 0xc6, 0x26, 0xc0, 0x36, 0xc5, 0x26, 0xc1, 0x36, 0xc5,
  0x26, 0xc0, 0x36, 0xd7, 0x26, 0x36, 0xc1, 0x26, 0x36, 0xc1, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0xc1, 0x36, 0xc5, 0x26, 0x36, 0xfd, 0xfd, 0xfd, 0xdb,
  0x26, 0x36, 0xc7, 0x26, 0x36, 0xc6, 0x26, 0x36, 0xf1, 0x26, 0x36, 0xc7,
  0x26, 0x36, 0xc6, 0x26, 0x36, 0xfd, 0xfc, 0x26, 0x36, 0xc6, 0x26, 0xc1,
  0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xf1, 0x26, 0x36, 0xc6, 0x26, 0x36,
  0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xf1, 0x26, 0x36, 0xc6, 0x26,
  0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xf1, 0x26, 0x36, 0xc6,
  0x26, 0x36, 0x26, 0x36, 0xc4, 0x26, 0x36, 0x26, 0x36, 0xf1, 0x26, 0x36,
  0xc6, 0x26, 0xc1, 0x36, 0xc4, 0x26, 0xc1, 0x36, 0xfd, 0xfd, 0xfd, 0xc7,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
};
static Uint8 fontmap[256] = {
      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      0, 68, 73, 72, 89, 94, 75, 74, 76, 77, 88, 86, 64, 69, 63, 83,
     53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 66, 65, 92, 87, 93, 67,
     84,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
     16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 78, 82, 79,  0, 70,
     81, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41,
     42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,  0, 80,  0, 71,  0,
};
static Uint32 font[FONTH*FONTW];

typedef struct {
    int width, height, alpha, srgb;
    Uint8 *p, *end;
    int last, run;
    Uint32 c, table[64];
} Qoi;

static Qoi newqoi(Uint8 *p, int len)
{
    Qoi q = {0};
    q.p      = p + 14;
    q.end    = p + len;
    q.width  = (Uint32)p[ 4]<<24 | p[ 5]<<16 | p[ 6]<< 8 | p[ 7];
    q.height = (Uint32)p[ 8]<<24 | p[ 9]<<16 | p[10]<< 8 | p[11];
    q.last   = -1;
    q.alpha  = p[12]==4;
    q.srgb   = p[13]==1;
    q.c      = 0xff000000;
    return q;
}

static Uint32 qoidecode(Qoi *q)
{
    if (q->run) {
        q->run--;
    } else {
        int n, v=*q->p++;
        Uint8 *p=q->p, r, g, b, a;
        switch (v&0xc0) {
        case 0x00:  // INDEX
            q->c = q->table[v];
            goto skiptable;
        case 0x40:  // DIFF
            r=q->c, g=q->c>>8, b=q->c>>16, a=q->c>>24;
            r += (v>>4 & 3) - 2;
            g += (v>>2 & 3) - 2;
            b += (v>>0 & 3) - 2;
            q->c = r | g<<8 | b<<16 | (Uint32)a<<24;
            break;
        case 0x80:  // LUMA
            n = v - (0x80 + 32);
            r=q->c, g=q->c>>8, b=q->c>>16, a=q->c>>24;
            r += n + (*p>>4) - 8;
            g += n;
            b += n + (*p&15) - 8;
            q->c = r | g<<8 | b<<16 | (Uint32)a<<24;
            q->p += 1;
            break;
        case 0xc0:
            switch ((n = v&63)) {
            case 63:  // RGBA
                q->c = p[0] | p[1]<<8 | p[2]<<16 | (Uint32)p[3]<<24;
                q->p += 4;
                break;
            case 62:  // RGB
                r=p[0], g=p[1], b=p[2], a=q->c>>24;
                q->c = r | g<<8 | b<<16 | (Uint32)a<<24;
                q->p += 3;
                break;
            default:  // RUN
                q->run = n;
                break;
            }
        }
        r=q->c, g=q->c>>8, b=q->c>>16, a=q->c>>24;
        q->table[(r*3 + g*5 + b*7 + a*11)&63] = q->c;
        skiptable: q->last = v;
    }
    return q->c;
}

static SDL_Texture *newfont(SDL_Renderer *r)
{
    Qoi q = newqoi(fontqoi, sizeof(fontqoi));
    for (int i = 0; i < FONTW*FONTH; i++) {
        font[i] = qoidecode(&q);
    }
    SDL_Texture *t = SDL_CreateTexture(
        r, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC,
        FONTW, FONTH
    );
    SDL_SetTextureBlendMode(t, SDL_BLENDMODE_BLEND);
    SDL_UpdateTexture(t, 0, font, FONTW*4);
    return t;
}

static void drawtext(
    SDL_Renderer *r, SDL_Texture *t, int x, int y, int size, char *msg)
{
    for (int i = 0; msg[i]; i++) {
        int c = fontmap[msg[i]&255];
        if (c--) {
            SDL_Rect src = {c%8*CHARW, c/8*CHARH+1, CHARW, CHARH};
            SDL_Rect dst = {x+i*CHARW*size, y, CHARW*size, CHARH*size};
            SDL_RenderCopy(r, t, &src, &dst);
        }
    }
}

int main(int argc, char **argv)
{
    int width = 800;
    int height = 600;

    SDL_Init(SDL_INIT_VIDEO);
    SDL_Window *w = SDL_CreateWindow(
        "Text Demo", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
        width, height, 0
    );
    SDL_Renderer *r = SDL_CreateRenderer(w, -1, SDL_RENDERER_PRESENTVSYNC);
    SDL_Texture *fonttx = newfont(r);

    Uint64 rng = 1;
    SDL_Color bg = {127, 63, 63, 255};
    char msg[] = "onfrqpunq21 vf n ivetva";
    int msglen = sizeof(msg) - 1;

    for (;;) {
        SDL_Event e;
        while (SDL_PollEvent(&e)) {
            rng += e.common.timestamp;
            switch (e.type) {
            case SDL_QUIT:
                return 0;
            }
        }

        // Randomly purturb the rectangle color
        rng = rng*0x3243f6a8885a308d + 1;
        bg.r = SDL_clamp(bg.r + (int)((rng>>34 & 1023)%5 - 2), 0, 192);
        bg.g = SDL_clamp(bg.g + (int)((rng>>44 & 1023)%5 - 2), 0, 192);
        bg.b = SDL_clamp(bg.b + (int)((rng>>54 & 1023)%5 - 2), 0, 192);

        SDL_SetRenderDrawColor(r, 50, 50, 50, 255);
        SDL_RenderClear(r);

        SDL_SetRenderDrawColor(r, bg.r, bg.g, bg.b, bg.a);
        int padx = 12;
        int pady = 4;
        SDL_Rect rect = {
            width/padx, height/pady,
            width*(padx-2)/padx, height*(pady-2)/pady
        };
        SDL_RenderFillRect(r, &rect);

        char decoded[sizeof(msg)] = {0};
        for (int i = 0; msg[i]; i++) {  // decode the secret
            decoded[i] = msg[i];
            rng = rng*0x3243f6a8885a308d + 1;
            int flip = !((rng >> 58) & 63);
            if (msg[i]>='a' && msg[i]<='z') {
                decoded[i] = (msg[i]-'a' + 13)%26 + 'a';
                if (flip) msg[i] += 'A' - 'a';
            } else if (msg[i]>='A' && msg[i]<='Z') {
                decoded[i] = (msg[i]-'A' + 13)%26 + 'A';
                if (flip) msg[i] -= 'A' - 'a';
            }
        }
        int size = 3;
        int x = (width  - CHARW*size*msglen)/2;
        int y = (height - CHARH*size)/2;
        drawtext(r, fonttx, x, y, size, decoded);
        SDL_RenderPresent(r);
    }
}