PngImageReader.hxx

Go to the documentation of this file.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 */
 
#ifndef INCLUDED_VCL_FILTER_PNGIMAGEREADER_HXX
#define INCLUDED_VCL_FILTER_PNGIMAGEREADER_HXX
 
#include <sal/config.h>
 
#include <memory>
#include <vector>
 
#include <vcl/dllapi.h>
#include <vcl/BinaryDataContainer.hxx>
 
#include <com/sun/star/uno/Reference.hxx>
 
namespace com::sun::star::task
{
class XStatusIndicator;
}
 
class Graphic;
class BitmapEx;
class SvStream;
 
namespace vcl
{
class VCL_DLLPUBLIC PngImageReader
{
    SvStream& mrStream;
    css::uno::Reference<css::task::XStatusIndicator> mxStatusIndicator;
 
public:
    PngImageReader(SvStream& rStream);
 
    // Returns true if image was successfully read without errors.
    // A usable bitmap may be returned even if there were errors (e.g. incomplete image).
    bool read(BitmapEx& rBitmap);
    bool read(Graphic& rGraphic);
    // Returns a bitmap without indicating if there were errors.
    BitmapEx read();
 
    // Returns the contents of the msOG chunk (containing a Gif image), if it exists.
    // Does not change position in the stream.
    static BinaryDataContainer getMicrosoftGifChunk(SvStream& rStream);
 
    static bool isAPng(SvStream& rStream);
};
 
} // namespace vcl
 
#endif
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */