rTextureRenderTarget Class Reference

texture that can be used as a target for rendering More...

#include <rTextureRenderTarget.h>

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List of all members.

Public Member Functions
void	Clear ()
	clears the texture
	~rTextureRenderTarget ()
	rTextureRenderTarget (int width, int height)
	creates a render target texture of the specified dimensions
void	Push ()
	makes this texture the active render target
void	Pop ()
	removes this texture as the active render target
bool	IsTarget () const
int	GetHeight () const
int	GetWidth () const
Static Public Member Functions
static void	Restore ()
	restores current render target if it was overwritten by an evil manual glBindFramebuffer call
Protected Member Functions
virtual void	OnSelect (bool)
	Selects the texture for rendering.
virtual void	OnUnload ()
	Unloads the texture from OpenGL and memory.
Private Attributes
rGLuintObjectTexture	texture_
	the texture render target
rGLuintObjectRenderbuffer	depthBuffer_
	the depth buffer
rGLuintObjectFramebuffer	frameBuffer_
	the frame buffer
rTextureRenderTarget *	previous
int	width_
int	height_
GLenum	colorMode
GLenum	depthMode
Static Private Attributes
static rTextureRenderTarget *	anchor = 0

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Detailed Description

texture that can be used as a target for rendering

Definition at line 36 of file rTextureRenderTarget.h.

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Constructor & Destructor Documentation

rTextureRenderTarget::~rTextureRenderTarget

(

)

Definition at line 59 of file rTextureRenderTarget.cpp.

References Clear(), IsTarget(), and Pop().

{
    if ( IsTarget() )
    {
        Pop();
    }

    Clear();
}

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rTextureRenderTarget::rTextureRenderTarget	(	int	width,
		int	height
	)

creates a render target texture of the specified dimensions

Definition at line 69 of file rTextureRenderTarget.cpp.

References depthBuffer_, height_, NULL, Pop(), previous, Push(), sr_CheckGLError(), tASSERT, texture_, and width_.

{
#ifndef DEDICATED
    sr_CheckGLError();

    width_ = width;
    height_ = height;
    previous = 0;

#ifdef GLEW_EXT_framebuffer_object
    if ( GLEW_EXT_framebuffer_object )
    {
        Push();
        sr_CheckGLError();

        // generate texture
        glBindTexture( GL_TEXTURE_2D, texture_ );
        sr_CheckGLError();

        // make texture
        glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
        sr_CheckGLError();

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);

        glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, texture_, 0 );
        sr_CheckGLError();

        glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, depthBuffer_ );
        sr_CheckGLError();

        glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT32, width, height );
        sr_CheckGLError();

        glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depthBuffer_ );
        sr_CheckGLError();

        GLenum status = glCheckFramebufferStatusEXT( GL_FRAMEBUFFER_EXT);
        switch ( status )
        {
        case GL_FRAMEBUFFER_COMPLETE_EXT:
            break;
        case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
            throw rExceptionGLEW( "Unsupported frame buffer operation" );
        default:
            tASSERT( 0 );
        }

        sr_CheckGLError();

        Pop();

        return;
    }
#endif // GLEW_EXT_framebuffer_object

    throw rExceptionGLEW( "frame buffer extension not supported" );
#endif
}

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Member Function Documentation

void rTextureRenderTarget::Clear

(

void

)

clears the texture

texture that can be used as a target for rendering

Parameters:

@return

Definition at line 50 of file rTextureRenderTarget.cpp.

References depthBuffer_, frameBuffer_, IsTarget(), tASSERT, and texture_.

Referenced by ~rTextureRenderTarget().

{
    tASSERT( !IsTarget() );

    texture_.Delete();
    depthBuffer_.Delete();
    frameBuffer_.Delete();
}

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void rTextureRenderTarget::Push

(

)

makes this texture the active render target

Definition at line 132 of file rTextureRenderTarget.cpp.

References anchor, frameBuffer_, previous, and sr_CheckGLError().

Referenced by rTextureRenderTarget(), and sr_MotionBlurCore().

{
#ifndef DEDICATED
    previous = anchor;
    anchor = this;

#ifdef GLEW_EXT_framebuffer_object
    sr_CheckGLError();

    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, frameBuffer_ );

    sr_CheckGLError();
#endif
#endif
}

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void rTextureRenderTarget::Pop

(

)

removes this texture as the active render target

Definition at line 148 of file rTextureRenderTarget.cpp.

References anchor, IsTarget(), previous, Restore(), and tASSERT.

Referenced by rTextureRenderTarget(), sr_MotionBlurCore(), and ~rTextureRenderTarget().

{
#ifndef DEDICATED
    tASSERT( IsTarget() );

    anchor = previous;

    Restore();
#endif
}

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void rTextureRenderTarget::Restore

(

)

[static]

restores current render target if it was overwritten by an evil manual glBindFramebuffer call

Definition at line 159 of file rTextureRenderTarget.cpp.

References anchor, frameBuffer_, and sr_CheckGLError().

Referenced by Pop().

{
#ifdef GLEW_EXT_framebuffer_object
    sr_CheckGLError();
    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, anchor ? anchor->frameBuffer_ : 0 );
    sr_CheckGLError();
#endif
}

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bool rTextureRenderTarget::IsTarget

(

)

const [inline]

Definition at line 56 of file rTextureRenderTarget.h.

References anchor.

Referenced by Clear(), Pop(), sr_MotionBlurCore(), and ~rTextureRenderTarget().

    {
        return anchor == this;
    }

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int rTextureRenderTarget::GetHeight

(

)

const [inline]

Definition at line 61 of file rTextureRenderTarget.h.

References height_.

Referenced by sr_MotionBlurCore().

    {
        return height_;
    }

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int rTextureRenderTarget::GetWidth

(

)

const [inline]

Definition at line 66 of file rTextureRenderTarget.h.

References width_.

Referenced by sr_MotionBlurCore().

    {
        return width_;
    }

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void rTextureRenderTarget::OnSelect

(

bool

enforce

)

[protected, virtual]

Selects the texture for rendering.

Parameters:

enforce

enforce when set to true, the texture should be loaded even if the configuration says it should not

Implements rITexture.

Definition at line 168 of file rTextureRenderTarget.cpp.

References texture_.

{
#ifndef DEDICATED
    glBindTexture( GL_TEXTURE_2D, texture_ );
#endif
}

virtual void rTextureRenderTarget::OnUnload

(

void

)

[inline, protected, virtual]

Unloads the texture from OpenGL and memory.

Implements rITexture.

Definition at line 74 of file rTextureRenderTarget.h.

{}

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Member Data Documentation

rGLuintObjectTexture rTextureRenderTarget::texture_ [private]

the texture render target

Definition at line 76 of file rTextureRenderTarget.h.

Referenced by Clear(), OnSelect(), and rTextureRenderTarget().

rGLuintObjectRenderbuffer rTextureRenderTarget::depthBuffer_ [private]

the depth buffer

Definition at line 77 of file rTextureRenderTarget.h.

Referenced by Clear(), and rTextureRenderTarget().

rGLuintObjectFramebuffer rTextureRenderTarget::frameBuffer_ [private]

the frame buffer

Definition at line 78 of file rTextureRenderTarget.h.

Referenced by Clear(), Push(), and Restore().

rTextureRenderTarget * rTextureRenderTarget::anchor = 0 [static, private]

Definition at line 81 of file rTextureRenderTarget.h.

Referenced by IsTarget(), Pop(), Push(), and Restore().

rTextureRenderTarget* rTextureRenderTarget::previous [private]

Definition at line 82 of file rTextureRenderTarget.h.

Referenced by Pop(), Push(), and rTextureRenderTarget().

int rTextureRenderTarget::width_ [private]

Definition at line 84 of file rTextureRenderTarget.h.

Referenced by GetWidth(), and rTextureRenderTarget().

int rTextureRenderTarget::height_ [private]

Definition at line 84 of file rTextureRenderTarget.h.

Referenced by GetHeight(), and rTextureRenderTarget().

GLenum rTextureRenderTarget::colorMode [private]

Definition at line 85 of file rTextureRenderTarget.h.

GLenum rTextureRenderTarget::depthMode [private]

Definition at line 85 of file rTextureRenderTarget.h.

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

• src/render/rTextureRenderTarget.h
• src/render/rTextureRenderTarget.cpp

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