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skeeto/demo.c

Last active March 8, 2024 03:11
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Font rendering demo in SDL2
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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,
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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);
}
}
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