misc/quazip/quaadler32.cpp
author nemo
Tue, 27 Dec 2011 14:14:26 -0500
changeset 6534 e6cb8a41b5f4
parent 5752 ea95ee97c805
permissions -rw-r--r--
Experiment in eliminating transparent white from LandPixels - I think it messes up on some graphics cards. Noticed a curious white border on a girder in a theme Randy is working on. At the very least it is slightly more efficient in the blit.

#include "quaadler32.h"

#include "zlib.h"

QuaAdler32::QuaAdler32()
{
	reset();
}

quint32 QuaAdler32::calculate(const QByteArray &data)
{
	return adler32( adler32(0L, Z_NULL, 0), (const Bytef*)data.data(), data.size() );
}

void QuaAdler32::reset()
{
	checksum = adler32(0L, Z_NULL, 0);
}

void QuaAdler32::update(const QByteArray &buf)
{
	checksum = adler32( checksum, (const Bytef*)buf.data(), buf.size() );
}

quint32 QuaAdler32::value()
{
	return checksum;
}