PBuffer Class Reference

#include <TAPsPBuffer.hpp>

List of all members.

Public Member Functions
void	Activate (PBuffer *current=NULL)
unsigned int	CopyToBuffer (void *ptr, int w=-1, int h=-1)
bool	Create (int iWidth, int iHeight, bool bShareContexts, bool bShareObjects)
void	Deactivate ()
void	Destroy ()
int	GetBitsPerComponent ()
int	GetHeight ()
int	GetNoOfComponents ()
unsigned int	GetSizeInBytes ()
int	GetWidth ()
bool	IsSharedContext ()
	PBuffer (const char *strMode, bool managed=false)
	~PBuffer ()
Protected Attributes
bool	m_bSharedContextStatus
bool	m_bShareObjectsStatus
const char *	m_cpMode
int	m_iBitsPerComponent
int	m_iHeight
int	m_iNoOfComponents
int	m_iWidth
Private Member Functions
int	GetIntValue (std::string sToken)
std::string	GetStrValue (std::string sToken)
Friends
std::ostream &	operator<< (std::ostream &output, PBuffer const &o)

---

Detailed Description

Before creating a PBuffer, the "OpenGL Extension Wrangler" library must be initialized first.

Example Code ---------------------------------------------------------------- Initialize the "OpenGL Extension Wrangler" library glewInit(); if (WGLEW_ARB_pbuffer) { std::cout << "OK, we can use pbuffers.\n"; } else { std::cout << "Sorry, pbuffers will not work on this platform.\n"; } ----------------------------------------------------------------

Definition at line 82 of file TAPsPBuffer.hpp.

---

Constructor & Destructor Documentation

PBuffer::PBuffer	(	const char *	strMode,
		bool	managed = false
	)

PBuffer::~PBuffer

(

)

---

Member Function Documentation

void PBuffer::Activate

(

PBuffer *

current = NULL

)

unsigned int PBuffer::CopyToBuffer	(	void *	ptr,
		int	w = -1,
		int	h = -1
	)

Definition at line 669 of file TAPsPBuffer.cpp.

{
    GLenum format;
    GLenum type;
    //----------------------------------------------------------------
    switch ( m_iNoOfComponents ) {
        case 1:
            format = GL_LUMINANCE;  // Is it right to ask for Red only component?
            break;
        case 2:
            format = GL_LUMINANCE_ALPHA;    // How to ask for GL_RG?
            break;
        case 3:
            format = GL_RGB;
            break;
        case 4:
            format = GL_RGBA;
            break;
    }
    //----------------------------------------------------------------
    switch ( m_iBitsPerComponent ) {
        case 8:
            type = GL_UNSIGNED_BYTE;
            break;
        case 32:
            type = GL_FLOAT;
            break;
    #ifdef GL_NV_half_float
        case 16:
            type = GL_HALF_FLOAT_NV;
        break;
    #endif
        default:
            DEBUG_MESSAGE_TAPS_PIXEL_BUFFER_HPP ( stdout, 
                "PBuffer ERROR: call PBuffer::CopyToBuffer() failed - Unknown Bits Per Component!\n" 
            );
        #if defined ( WIN32 )
            _asm { int 3 }
        #endif
    }
    //----------------------------------------------------------------
    Activate();
    if ( w < 0 || m_iWidth < w )    w = m_iWidth;
    if ( h < 0 || m_iHeight < h )   h = m_iHeight;
    glReadPixels( 0, 0, w, h, format, type, ptr );
    Deactivate();
    return w * h * ( m_iNoOfComponents / 8 );
}

bool PBuffer::Create	(	int	iWidth,
		int	iHeight,
		bool	bShareContexts,
		bool	bShareObjects
	)

void PBuffer::Deactivate

(

)

void PBuffer::Destroy

(

)

int PBuffer::GetBitsPerComponent

(

)

[inline]

Definition at line 134 of file TAPsPBuffer.hpp.

{ return m_iBitsPerComponent; }

int PBuffer::GetHeight

(

)

[inline]

Definition at line 136 of file TAPsPBuffer.hpp.

{ return m_iHeight; }

int PBuffer::GetIntValue

(

std::string

sToken

)

[private]

Definition at line 728 of file TAPsPBuffer.cpp.

{
    size_t pos;
    if ( ( pos = sToken.find( "=" ) ) != sToken.npos ) {
        std::string sValue = sToken.substr( pos+1, sToken.length() - pos + 1 );
        if ( sValue.empty() )   return 1;
        return atoi( sValue.c_str() );
    }
    else return 1;
}

int PBuffer::GetNoOfComponents

(

)

[inline]

Definition at line 133 of file TAPsPBuffer.hpp.

{ return m_iNoOfComponents; }

BEGIN_NAMESPACE_TAPs__OpenGL unsigned int PBuffer::GetSizeInBytes

(

)

Definition at line 659 of file TAPsPBuffer.cpp.

{
    return m_iWidth * m_iHeight * ( m_iNoOfComponents / 8 );
}

std::string PBuffer::GetStrValue

(

std::string

sToken

)

[private]

Definition at line 718 of file TAPsPBuffer.cpp.

{
    size_t pos;
    if ( ( pos = sToken.find( "=" ) ) != sToken.npos ) {
        std::string sValue = sToken.substr( pos+1, sToken.length() - pos + 1 );
        return sValue;
    }
    else return "";
}

int PBuffer::GetWidth

(

)

[inline]

Definition at line 135 of file TAPsPBuffer.hpp.

{ return m_iWidth; }

bool PBuffer::IsSharedContext

(

)

[inline]

Definition at line 137 of file TAPsPBuffer.hpp.

{ return m_bSharedContextStatus; }

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Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	output,
		PBuffer const &	o
	)			[friend]

Definition at line 89 of file TAPsPBuffer.hpp.

    {
        output  << "PBuffer with ..."
                << "\n";
        return output;
    }

---

Member Data Documentation

bool PBuffer::m_bSharedContextStatus [protected]

Definition at line 154 of file TAPsPBuffer.hpp.

bool PBuffer::m_bShareObjectsStatus [protected]

Definition at line 155 of file TAPsPBuffer.hpp.

const char* PBuffer::m_cpMode [protected]

Definition at line 153 of file TAPsPBuffer.hpp.

int PBuffer::m_iBitsPerComponent [protected]

Definition at line 152 of file TAPsPBuffer.hpp.

int PBuffer::m_iHeight [protected]

Definition at line 150 of file TAPsPBuffer.hpp.

int PBuffer::m_iNoOfComponents [protected]

Definition at line 151 of file TAPsPBuffer.hpp.

int PBuffer::m_iWidth [protected]

Definition at line 150 of file TAPsPBuffer.hpp.

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The documentation for this class was generated from the following files:

• G:/spunak_xp/Works/TAPs/Include/TAPs/GLSL/TAPsPBuffer.hpp
• G:/spunak_xp/Works/TAPs/Include/TAPs/GLSL/TAPsPBuffer.cpp