Function stbi__readval

lite/example/cpp_example/mge/cv/stb_image.h:6988–7000

} stbi__pic_packet;

static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest) {
    int mask = 0x80, i;

    for (i = 0; i < 4; ++i, mask >>= 1) {
        if (channel & mask) {
            if (stbi__at_eof(s))
                return stbi__errpuc("bad file", "PIC file too short");
            dest[i] = stbi__get8(s);
        }
    }

    return dest;
}

static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src) {
    int mask = 0x80, i;