Function compressAndWrite

ESP32_AP-Flasher/src/makeimage.cpp:316–326

}

size_t compressAndWrite(Miniz::tdefl_compressor *comp, const void *inbuf, size_t inbytes, void *zlibbuf, size_t outsize, size_t totalbytes, File &f_out, Miniz::tdefl_flush flush) {
    size_t inbytes_compressed = inbytes;
    size_t outbytes_compressed = outsize;

    uint32_t t = millis();
    Miniz::tdefl_compressOEPL(comp, inbuf, &inbytes_compressed, zlibbuf, &outbytes_compressed, flush);
    Serial.printf("zlib: compressed %d into %d bytes in %d ms\r\n", inbytes_compressed, outbytes_compressed, millis() - t);

    f_out.write((const uint8_t *)zlibbuf, outbytes_compressed);
    return outbytes_compressed;
}

void rewriteHeader(File &f_out) {
    // https://www.rfc-editor.org/rfc/rfc1950