PdfCanvas.h

// SPDX-FileCopyrightText: 2006 Dominik Seichter <domseichter@web.de>
// SPDX-FileCopyrightText: 2020 Francesco Pretto <ceztko@gmail.com>
// SPDX-License-Identifier: LGPL-2.0-or-later OR MPL-2.0
 
#ifndef PDF_CANVAS_H
#define PDF_CANVAS_H
 
#include "PdfDeclarations.h"
#include "PdfResources.h"
#include "PdfArray.h"
#include <podofo/auxiliary/Corners.h>
 
namespace PoDoFo {
 
enum class PdfStreamAppendFlags
{
    None = 0,
    Prepend = 1,
    NoSaveRestorePrior = 2
};
 
class PODOFO_API PdfCanvas
{
public:
    virtual ~PdfCanvas();
 
    const PdfObject* GetContentsObject() const;
    PdfObject* GetContentsObject();
 
    virtual PdfObjectStream& GetOrCreateContentsStream(PdfStreamAppendFlags flags) = 0;
 
    virtual PdfObjectStream& ResetContentsStream() = 0;
 
    charbuff GetContentsCopy() const;
 
    void CopyContentsTo(charbuff& buffer) const;
    virtual void CopyContentsTo(OutputStream& stream) const = 0;
 
    PdfResources* GetResources();
    const PdfResources* GetResources() const;
 
    PdfDictionaryElement& GetElement();
    const PdfDictionaryElement& GetElement() const;
 
    virtual PdfResources& GetOrCreateResources() = 0;
 
    void EnsureResourcesCreated();
 
    virtual Corners GetRectRaw() const = 0;
 
    virtual bool TryGetRotationRadians(double& teta) const = 0;
 
protected:
    virtual PdfObject* getContentsObject() = 0;
    virtual PdfResources* getResources() = 0;
    virtual PdfDictionaryElement& getElement() = 0;
};
 
};
 
ENABLE_BITMASK_OPERATORS(PoDoFo::PdfStreamAppendFlags);
 
#endif // PDF_CANVAS_H