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char desired_output[] = "";
#define COLOR_PIXEL_FMT "\x1b[38;2;%03d;%03d;%03dm%c\x1b[0m"
typedef struct
{
union
{
char data[24];
struct term_str_st
{
char color_set[7];
char r[3];
char s1;
char g[3];
char s2;
char b[3];
char m;
char c;
char color_reset[4];
} str;
};
} term_pixel_t;
struct cimg
{
struct cimg_header header;
unsigned num_pixels;
term_pixel_t *framebuffer;
};
#define CIMG_NUM_PIXELS(cimg) ((cimg)->header.width * (cimg)->header.height)
#define CIMG_DATA_SIZE(cimg) (CIMG_NUM_PIXELS(cimg) * sizeof(pixel_t))
#define CIMG_FRAMEBUFFER_PIXELS(cimg) ((cimg)->header.width * (cimg)->header.height)
#define CIMG_FRAMEBUFFER_SIZE(cimg) (CIMG_FRAMEBUFFER_PIXELS(cimg) * sizeof(term_pixel_t))
void display(struct cimg *cimg, pixel_t *data)
{
int idx = 0;
for (int y = 0; y < cimg->header.height; y++)
{
for (int x = 0; x < cimg->header.width; x++)
{
idx = (0+y)*((cimg)->header.width) + ((0+x)%((cimg)->header.width));
char emit_tmp[24+1];
snprintf(emit_tmp, sizeof(emit_tmp), "\x1b[38;2;%03d;%03d;%03dm%c\x1b[0m", data[y * cimg->header.width + x].r, data[y * cimg->header.width + x].g, data[y * cimg->header.width + x].b, data[y * cimg->header.width + x].ascii);
memcpy((cimg)->framebuffer[idx%(cimg)->num_pixels].data, emit_tmp, 24);
}
}
for (int i = 0; i < cimg->header.height; i++)
{
write(1, cimg->framebuffer+i*cimg->header.width, sizeof(term_pixel_t)*cimg->header.width);
write(1, "\x1b[38;2;000;000;000m\n\x1b[0m", 24);
}
}
struct cimg *initialize_framebuffer(struct cimg *cimg)
{
cimg->num_pixels = CIMG_FRAMEBUFFER_PIXELS(cimg);
cimg->framebuffer = malloc(CIMG_FRAMEBUFFER_SIZE(cimg)+1);
if (cimg->framebuffer == NULL)
{
puts("ERROR: Failed to allocate memory for the framebuffer!");
exit(-1);
}
for (int idx = 0; idx < cimg->num_pixels; idx += 1)
{
char emit_tmp[24+1];
snprintf(emit_tmp, sizeof(emit_tmp), "\x1b[38;2;%03d;%03d;%03dm%c\x1b[0m", 255, 255, 255, ' ');
memcpy(cimg->framebuffer[idx].data, emit_tmp, 24);
}
return cimg;
}
void __attribute__ ((constructor)) disable_buffering() {
}
int main(int argc, char **argv, char **envp)
{
struct cimg cimg = { 0 };
cimg.framebuffer = NULL;
int won = 1;
if (argc > 1)
{
if (strcmp(argv[1]+strlen(argv[1])-5, ".cimg"))
{
printf("ERROR: Invalid file extension!");
exit(-1);
}
dup2(open(argv[1], O_RDONLY), 0);
}
read_exact(0, &cimg.header, sizeof(cimg.header), "ERROR: Failed to read header!", -1);
if (cimg.header.magic_number[0] != 'c' || cimg.header.magic_number[1] != 'I' || cimg.header.magic_number[2] != 'M' || cimg.header.magic_number[3] != 'G')
{
puts("ERROR: Invalid magic number!");
exit(-1);
}
if (cimg.header.version != 2)
{
puts("ERROR: Unsupported version!");
exit(-1);
}
initialize_framebuffer(&cimg);
unsigned long data_size = cimg.header.width * cimg.header.height * sizeof(pixel_t);
pixel_t *data = malloc(data_size);
if (data == NULL)
{
puts("ERROR: Failed to allocate memory for the image data!");
exit(-1);
}
read_exact(0, data, data_size, "ERROR: Failed to read data!", -1);
for (int i = 0; i < cimg.header.width * cimg.header.height; i++)
{
if (data[i].ascii < 0x20 || data[i].ascii > 0x7e)
{
fprintf(stderr, "ERROR: Invalid character 0x%x in the image data!\n", data[i].ascii);
exit(-1);
}
}
display(&cimg, data);
if (cimg.num_pixels != sizeof(desired_output)/sizeof(term_pixel_t))
{
won = 0;
}
for (int i = 0; i < cimg.num_pixels && i < sizeof(desired_output)/sizeof(term_pixel_t); i++)
{
if (cimg.framebuffer[i].str.c != ((term_pixel_t*)&desired_output)[i].str.c)
{
won = 0;
}
if (
cimg.framebuffer[i].str.c != ' ' &&
cimg.framebuffer[i].str.c != '\n' &&
memcmp(cimg.framebuffer[i].data, ((term_pixel_t*)&desired_output)[i].data, sizeof(term_pixel_t))
)
{
won = 0;
}
}
if (won) win();
}
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