Pointer confusion | GameDev.net

Ok, so I have some smart pointers for texture files, and I''m having some trouble with them.

// Class TexPtr has: protected CImage *m_texture


TexPtr::TexPtr()
:m_texture(0)
{
}

TexPtr::TexPtr(CImage *m)
:m_texture(m)
{
	if(m_texture != 0)
		m_texture->attach();
}

TexPtr::TexPtr(TexPtr &p)
:m_texture(p.m_texture)
{
	if(m_texture != 0)
		m_texture->attach();
}

TexPtr::~TexPtr()
{
	if(m_texture != 0)
		m_texture->release();
}

void TexPtr::operator =(TexPtr &p)
{
	// release old pointer

	if(m_texture != 0)
		m_texture->release();

	// get new pointer and attach it

	m_texture=p.m_texture;
	if(m_texture != 0)
		m_texture->attach();
}

void TexPtr::operator =(CImage *p)
{
	// release old pointer

	if(m_texture != 0)
		m_texture->release();

	// get new pointer and attach it

	m_texture=p;
	if(m_texture != 0)
		m_texture->attach();
}


const CImage *TexPtr::operator ->()
{
	return m_texture;
}

const CImage TexPtr::operator *()
{
	return *m_texture;
}

bool TexPtr::operator ==(const CImage &p)
{
	return (m_texture==&p);
}

bool TexPtr::operator ==(const TexPtr &p)
{
	return (m_texture==p.m_texture);
}

bool TexPtr::operator !()
{
	return (m_texture == 0);
}

bool TexPtr::operator !=(const CImage &p)
{
	return (m_texture!=&p);
}

bool TexPtr::operator !=(const TexPtr &p)
{
	return (m_texture!=p.m_texture);
}

class CImage:public MemoryObject
{
public:

	//Load the image

	bool Load(char * szFilename);
	//Bind texture

	void Bind();
	//Unbind texture

	void UnBind();
	//Flip image

	void VFlip(unsigned char * ucpData, unsigned int uiHeight, unsigned int uiWidth, unsigned int uiBpp); //Vertically


	//Save a screenshot

	static void ScreenShot(char * szDstFile = "screenshot.tga");

	unsigned int getID()
	{
		return m_uiImage;
	}

	//Constructors

	CImage()
	:m_bBlend(false), m_szFilename(NULL), m_ucpBuffer(NULL), m_uiImage(0)
	{
	}

	CImage(char * szFile)
	:m_bBlend(false), m_szFilename(NULL), m_ucpBuffer(NULL)
	{
		Load(szFile);
	}
	~CImage()
	{
	}

	void Destroy()
	{
		glDeleteTextures(1, &m_uiImage);
	}

	void ReloadTexture()
	{
		if(m_uiImage != 0)
			Load(m_szFilename);
	}

private:


	//Load various image formats

	bool LoadTGA(bool bCompressed);
	bool LoadBMP();
	bool LoadPCX();
	bool LoadJPG();

	//dimentions

	unsigned int m_uiWidth;
	unsigned int m_uiHeight;
	//unsigned int m_uiFileLen; //needed for PCX

	//Image ID

	unsigned int m_uiImage;
	//file buffer

	unsigned char * m_ucpBuffer;
	//mipmap?

	bool m_bMipMap;
	bool m_bBlend;
	//filename

	char * m_szFilename;
};

// Sphere has protected TexPtr texture

void Sphere::draw()
{
	glColor3f(getRed(), getGreen(), getBlue());
	orientation.multTimesWorld();

	if(texture.isValid())
		texture->Bind();

	gluSphere(quadratic, radius, precision, precision);

	if(texture.isValid())
		texture->UnBind();
}

I get the following error upon compilation:

c:\program files\microsoft visual studio\opengl\strnad\project\recent\currenterikengine\sphere.cpp(33) : error C2662: ''Bind'' : cannot convert ''this'' pointer from ''const class CImage'' to ''class CImage &''
        Conversion loses qualifiers
c:\program files\microsoft visual studio\opengl\strnad\project\recent\currenterikengine\sphere.cpp(38) : error C2662: ''UnBind'' : cannot convert ''this'' pointer from ''const class CImage'' to ''class CImage &''
        Conversion loses qualifiers

What''s going on?

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