nodeabmp.cpp

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// $Id: nodeabmp.cpp 751 2006-03-31 15:43:49Z alex $
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 */
//
// NodeAnimatingBitmap
//
// This class is like a plain ol' NodeBitmap, but instead manages a collection of
// related bitmaps, such as an animating GIF.
//

#include "camtypes.h"

#include "nodeabmp.h"
#include "bmpcomp.h"

CC_IMPLEMENT_DYNAMIC(NodeAnimatingBitmap, NodeBitmap)



NodeAnimatingBitmap::NodeAnimatingBitmap()
  : m_pBmpRefs(0),
    m_nBmpCount(0)
{

}



NodeAnimatingBitmap::NodeAnimatingBitmap(Node* ContextNode, AttachNodeDirection Direction, 
                                         BOOL Locked, BOOL Mangled, BOOL Marked, BOOL Selected)
  : NodeBitmap(ContextNode, Direction, Locked, Mangled, Marked, Selected),
    m_pBmpRefs(0),
    m_nBmpCount(0)
{

}



NodeAnimatingBitmap::~NodeAnimatingBitmap()
{

}



String NodeAnimatingBitmap::Describe(BOOL Plural, BOOL Verbose)
{
    // TEMP: this is candy-floss for now.
    return NodeBitmap::Describe(Plural, Verbose);
}



UINT32 NodeAnimatingBitmap::GetNodeSize() const
{
    return sizeof(*this);
}



Node* NodeAnimatingBitmap::SimpleCopy()
{
    NodeAnimatingBitmap* pCopy = new NodeAnimatingBitmap;
    if (pCopy) CopyNodeContents(pCopy);
    return pCopy;
}



void NodeAnimatingBitmap::CopyNodeContents(NodeAnimatingBitmap* pCopy)
{
    // Copy the base class followed by members specific to this derived class.
    NodeBitmap::CopyNodeContents(pCopy);
    if (pCopy->AllocBitmapRefs(m_nBmpCount))
        for (UINT32 i = 0; i < m_nBmpCount; i++)
            pCopy->m_pBmpRefs[i] = m_pBmpRefs[i];
}



/***********************************************************************************************
>   void NodeAnimatingBitmap::PolyCopyNodeContents(NodeRenderable* pNodeCopy)

    Author:     Phil_Martin (Xara Group Ltd) <camelotdev@xara.com>
    Created:    18/12/2003
    Outputs:    -
    Purpose:    Polymorphically copies the contents of this node to another
    Errors:     An assertion failure will occur if NodeCopy is NULL
    Scope:      protected
                                     
***********************************************************************************************/

void NodeAnimatingBitmap::PolyCopyNodeContents(NodeRenderable* pNodeCopy)
{
    ENSURE(pNodeCopy, "Trying to copy a node's contents into a NULL node");
    ENSURE(IS_A(pNodeCopy, NodeAnimatingBitmap), "PolyCopyNodeContents given wrong dest node type");

    if (IS_A(pNodeCopy, NodeAnimatingBitmap))
        CopyNodeContents((NodeAnimatingBitmap*)pNodeCopy);
}



KernelBitmap* NodeAnimatingBitmap::EnumerateBitmaps(UINT32 nCount)
{
    return (nCount < m_nBmpCount) ? m_pBmpRefs[nCount].GetBitmap() : 0;
}



KernelBitmapRef* NodeAnimatingBitmap::GetBitmapRef()
{
    return &m_pBmpRefs[m_nCurrentBmp];
}



KernelBitmap* NodeAnimatingBitmap::GetBitmap()
{
    KernelBitmap* pBitmap = m_pBmpRefs[m_nCurrentBmp].GetBitmap();
    if (pBitmap && pBitmap->HasBeenDeleted())
    {   
        // If necessary (due to the crud that is the bitmap system) use the default bitmap instead.
        ERROR2IF(pBitmap->GetParentBitmapList() == NULL, NULL, "Deleted bitmap has no parent list");
        pBitmap = pBitmap->GetParentBitmapList()->FindDefaultBitmap();

        // There should always be a default bitmap in the list
        ERROR2IF(pBitmap == NULL, 0L, "Couldn't find the default bitmap");
    }
    
    return pBitmap;
}



BOOL NodeAnimatingBitmap::AllocBitmapRefs(INT32 nCount)
{
    ERROR3IF(m_pBmpRefs != 0, "Bitmaps already allocated in NodeAnimatingBitmap::AllocBitmapRefs");
    ERROR3IF(nCount <= 0, "Invalid count in NodeAnimatingBitmap::AllocBitmapRefs");
    m_pBmpRefs = new KernelBitmapRef[nCount];
    return m_pBmpRefs != 0;
}

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