C++ Fbo::getSize方法代码示例

void BubbleChamberApp::drawIntoRoomFbo()
{
	mRoomFbo.bindFramebuffer();
	gl::clear( ColorA( 0.0f, 0.0f, 0.0f, 0.0f ), true );
	
	gl::setMatricesWindow( mRoomFbo.getSize(), false );
	gl::setViewport( mRoomFbo.getBounds() );
	gl::disableAlphaBlending();
	gl::enable( GL_TEXTURE_2D );
	glEnable( GL_CULL_FACE );
	glCullFace( GL_BACK );
	Matrix44f m;
	m.setToIdentity();
	m.scale( mRoom.getDims() );

	mRoomShader.bind();
	mRoomShader.uniform( "mvpMatrix", mActiveCam.mMvpMatrix );
	mRoomShader.uniform( "mMatrix", m );
	mRoomShader.uniform( "eyePos", mActiveCam.mCam.getEyePoint() );
	mRoomShader.uniform( "roomDims", mRoom.getDims() );
	mRoomShader.uniform( "power", mRoom.getPower() );
	mRoomShader.uniform( "lightPower", mRoom.getLightPower() );
	mRoomShader.uniform( "timePer", mRoom.getTimePer() * 1.5f + 0.5f );
	mRoom.draw();
	mRoomShader.unbind();
	
	mRoomFbo.unbindFramebuffer();
	glDisable( GL_CULL_FACE );
}

void MemExploreApp::draw()
{
  mTexture = gl::Texture(mDataPointer, GL_RGBA, mVolumeDim * mTilesDim, mVolumeDim * mTilesDim);
  mTexture.setWrap(GL_REPEAT, GL_REPEAT);
  mTexture.setMinFilter(GL_NEAREST);
  mTexture.setMagFilter(GL_NEAREST);
  
  float frustum[6];
  mCamera.getFrustum(&frustum[0], &frustum[1], &frustum[2], &frustum[3], &frustum[4], &frustum[5]);

  mFbo.bindFramebuffer();
  gl::setMatricesWindow(mFbo.getSize(), false);

  mProgram.bind();
  mProgram.uniform("uTexture", 0);
  mProgram.uniform("uVolumeDim", mVolumeDim);
  mProgram.uniform("uTilesDim", mTilesDim);
  mProgram.uniform("uTime", (float)getElapsedSeconds());
  mProgram.uniform("uEyePoint", mCamera.getEyePoint());
  mProgram.uniform("uXAxis", mCamera.getOrientation() * Vec3f::xAxis());
  mProgram.uniform("uYAxis", mCamera.getOrientation() * Vec3f::yAxis());
  mProgram.uniform("uViewDistance", mCamera.getAspectRatio() / abs(frustum[2] - frustum[0]) * mCamera.getNearClip());
  mProgram.uniform("uNegViewDir", -mCamera.getViewDirection().normalized());
  mProgram.uniform("uAspectRatio", mCamera.getAspectRatio());
  mTexture.enableAndBind();
  gl::drawSolidRect(mFbo.getBounds());
  mTexture.unbind();
  mProgram.unbind();
  
  mFbo.unbindFramebuffer();
  
  gl::setMatricesWindow(getWindowSize());
  gl::draw(mFbo.getTexture(), getWindowBounds());
}

void ShadedSphereApp::drawIntoRoomFbo()
{
	mRoomFbo.bindFramebuffer();
	gl::clear( ColorA( 0.0f, 0.0f, 0.0f, 0.0f ), true );
	
	gl::setMatricesWindow( mRoomFbo.getSize(), false );
	gl::setViewport( mRoomFbo.getBounds() );
	gl::disableAlphaBlending();
	gl::enable( GL_TEXTURE_2D );
	glEnable( GL_CULL_FACE );
	glCullFace( GL_BACK );
	Matrix44f m;
	m.setToIdentity();
	m.scale( mRoom.getDims() );
	
	//	mLightsTex.bind( 0 );
	mRoomShader.bind();
	mRoomShader.uniform( "mvpMatrix", mSpringCam.mMvpMatrix );
	mRoomShader.uniform( "mMatrix", m );
	mRoomShader.uniform( "eyePos", mSpringCam.getEye() );
	mRoomShader.uniform( "roomDims", mRoom.getDims() );
	mRoomShader.uniform( "mainPower", mRoom.getPower() );
	mRoomShader.uniform( "lightPower", mRoom.getLightPower() );
	mRoom.draw();
	mRoomShader.unbind();
	
	mRoomFbo.unbindFramebuffer();
	glDisable( GL_CULL_FACE );
}

void StereoscopicRenderingApp::renderAnaglyph(  const Vec2i &size, const ColorA &left, const ColorA &right )
{	
	// bind the FBO and clear its buffer
	mFbo.bindFramebuffer();
	gl::clear( mColorBackground );

	// render the scene using the side-by-side technique
	renderSideBySide( mFbo.getSize() );

	// unbind the FBO
	mFbo.unbindFramebuffer();

	// enable the anaglyph shader
	mShaderAnaglyph.bind();
	mShaderAnaglyph.uniform( "tex0", 0 );
	mShaderAnaglyph.uniform( "clr_left", left );
	mShaderAnaglyph.uniform( "clr_right", right );	

	// bind the FBO texture and draw a full screen rectangle,
	// which conveniently is exactly what the following line does
	gl::draw( mFbo.getTexture(), Rectf(0, float(size.y), float(size.x), 0) );

	// disable the anaglyph shader
	mShaderAnaglyph.unbind();
}

void CatalogApp::setFboPositions( gl::Fbo &fbo )
{
	int numBrightStars = mBrightStars.size();

	int index = 0;
	
	Surface32f posSurface( fbo.getTexture() );
	Surface32f::Iter it = posSurface.getIter();
	while( it.line() ){
		while( it.pixel() ){
			Vec3f pos = Vec3f( 1000000.0f, 0.0f, 0.0f );
			float col = 0.4f;
			float rad = 0.0f;
			if( index < numBrightStars ){
				pos = mBrightStars[index]->mPos;
				col = mBrightStars[index]->mColor;
				rad = floor( constrain( ( ( 6.0f - ( mBrightStars[index]->mAbsoluteMag ) )/6.0f ), 0.3f, 1.0f ) * 3.0f * 1000 );
			}
			it.r() = pos.x;
			it.g() = pos.y;
			it.b() = pos.z;
			it.a() = rad + col;

			index ++;
		}
	}

	gl::Texture posTexture( posSurface );
	fbo.bindFramebuffer();
	gl::setMatricesWindow( fbo.getSize(), false );
	gl::setViewport( fbo.getBounds() );
	gl::clear( ColorA( 0, 0, 0, 0 ), true );
	gl::draw( posTexture );
	fbo.unbindFramebuffer();
}

void StereoscopicRenderingApp::renderInterlacedHorizontal( const Vec2i &size )
{
	// bind the FBO and clear its buffer
	mFbo.bindFramebuffer();
	gl::clear( mColorBackground );

	// render the scene using the over-under technique
	renderOverUnder( mFbo.getSize() );

	// unbind the FBO
	mFbo.unbindFramebuffer();

	// enable the interlace shader
	mShaderInterlaced.bind();
	mShaderInterlaced.uniform( "tex0", 0 );
	mShaderInterlaced.uniform( "window_origin", Vec2f( getWindowPos() ) );
	mShaderInterlaced.uniform( "window_size", Vec2f( getWindowSize() ) );

	// bind the FBO texture and draw a full screen rectangle,
	// which conveniently is exactly what the following line does
	gl::draw( mFbo.getTexture(), Rectf(0, float(size.y), float(size.x), 0) );

	// disable the interlace shader
	mShaderInterlaced.unbind();
}

void SmoothDisplacementMappingApp::renderDisplacementMap()
{
	if( mDispMapShader && mDispMapFbo ) 
	{
		mDispMapFbo.bindFramebuffer();
		{
			// clear the color buffer
			gl::clear();			

			// setup viewport and matrices 
			glPushAttrib( GL_VIEWPORT_BIT );
			gl::setViewport( mDispMapFbo.getBounds() );

			gl::pushMatrices();
			gl::setMatricesWindow( mDispMapFbo.getSize(), false );

			// render the displacement map
			mDispMapShader.bind();
			mDispMapShader.uniform( "time", float( getElapsedSeconds() ) );
			mDispMapShader.uniform( "amplitude", mAmplitude );
			gl::drawSolidRect( mDispMapFbo.getBounds() );
			mDispMapShader.unbind();

			// clean up after ourselves
			gl::popMatrices();
			glPopAttrib();
		}
		mDispMapFbo.unbindFramebuffer();
	}
}

void KinectEcard::renderDepth(){
	if( !mDepthSurface || !mVideoSurface )
		return;

	gl::pushMatrices();
	{
		mDepthFbo.bindFramebuffer();

		// clear FBO
		gl::clear( Color::black() );
		gl::color( Color::white() );

		//
		gl::setMatricesWindowPersp( mDepthFbo.getSize() );

		// draw depth 
		gl::pushMatrices();
			gl::scale( 2, 2 );
			gl::draw( gl::Texture( mDepthSurface ) );
		gl::popMatrices();

		mDepthFbo.unbindFramebuffer();
	}
	gl::popMatrices();
}

/* 
 * @Description: need to blur[the SSAO texture] horizonatally then vertically (for shader performance reasons). Called ping-ponging as it one FBO drawn to another
 * @param: KeyEvent
 * @return: none
 */
void Base_ThreeD_ProjectApp::pingPongBlur()
{
	//render horizontal blue first
	gl::setViewport( mPingPongBlurH.getBounds() );
	
	mPingPongBlurH.bindFramebuffer();
	
	glClearColor( 0.5f, 0.5f, 0.5f, 1 );
	glClearDepth(1.0f);
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
	
	gl::setMatricesWindow( mPingPongBlurH.getSize() );
	
	mSSAOMap.getTexture().bind(0);
	mHBlurShader.bind();
	mHBlurShader.uniform("RTScene", 0);
    gl::drawSolidRect( Rectf( 0, 0, getWindowWidth(), getWindowHeight()) );
	mHBlurShader.unbind();
	mSSAOMap.getTexture().unbind(0);
	
	mPingPongBlurH.unbindFramebuffer();
	
	//gl::setViewport( getWindowBounds() ); //redundant
	
	//now render vertical blur
	gl::setViewport( mPingPongBlurV.getBounds() );
	
	mPingPongBlurV.bindFramebuffer();
	
	glClearColor( 0.5f, 0.5f, 0.5f, 1 );
	glClearDepth(1.0f);
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
	
	gl::setMatricesWindow( mPingPongBlurV.getSize() );
	
	mPingPongBlurH.getTexture().bind(0);
	mHBlurShader.bind();
	mHBlurShader.uniform("RTBlurH", 0);
	gl::drawSolidRect( Rectf( 0, 0, getWindowWidth(), getWindowHeight()) );
	mHBlurShader.unbind();
	mPingPongBlurH.getTexture().unbind(0);
	
	mPingPongBlurV.unbindFramebuffer();
	
	gl::setViewport( getWindowBounds() );
}

/* 
 * @Description: render SSAO now - woohoo!
 * @param: KeyEvent
 * @return: none
 */
void Base_ThreeD_ProjectApp::renderSSAOToFBO()
{
	gl::setViewport( mSSAOMap.getBounds() );
	
	//render out main scene to FBO
	mSSAOMap.bindFramebuffer();
	
	glClearColor( 0.5f, 0.5f, 0.5f, 1 );
	glClearDepth(1.0f);
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
	
	gl::setMatricesWindow( mSSAOMap.getSize() );
	
	mRandomNoise.bind(1);
	mNormalDepthMap.getTexture().bind(2);
	
	mSSAOShader.bind();
	
	mSSAOShader.uniform("rnm", 1 );
	mSSAOShader.uniform("normalMap", 2 );
    
    //look at shader and see you can set these through the client if you so desire.
    //	mSSAOShader.uniform("rnm", 1 );
    //	mSSAOShader.uniform("normalMap", 2 );	
    //	mSSAOShader.uniform("totStrength", 1.38f);
    //	mSSAOShader.uniform("strength", 0.07f);
    //	mSSAOShader.uniform("offset", 10.0f);
    //	mSSAOShader.uniform("falloff", 0.2f);
    //	mSSAOShader.uniform("rad", 0.8f);
    
    //	mSSAOShader.uniform("rnm", 1 );
    //	mSSAOShader.uniform("normalMap", 2 );
    //	mSSAOShader.uniform("farClipDist", 20.0f);
    //	mSSAOShader.uniform("screenSizeWidth", (float)getWindowWidth());
    //	mSSAOShader.uniform("screenSizeHeight", (float)getWindowHeight());
	
    //	mSSAOShader.uniform("grandom", 1 );
    //	mSSAOShader.uniform("gnormals", 2 );
    //	mSSAOShader.uniform("gdepth", 1 );
    //	mSSAOShader.uniform("gdiffuse", 1 );
    
    gl::drawSolidRect( Rectf( 0, 0, getWindowWidth(), getWindowHeight()) );
	
	mSSAOShader.unbind();
	
	mNormalDepthMap.getTexture().unbind(2);
	mRandomNoise.unbind(1);
	
	mSSAOMap.unbindFramebuffer();
	
	gl::setViewport( getWindowBounds() );
}

void syphonImpApp::renderSceneToFbo()
{
	// this will restore the old framebuffer binding when we leave this function
	// on non-OpenGL ES platforms, you can just call mFbo.unbindFramebuffer() at the end of the function
	// but this will restore the "screen" FBO on OpenGL ES, and does the right thing on both platforms
	gl::SaveFramebufferBinding bindingSaver;
	
	// bind the framebuffer - now everything we draw will go there
	myFbo.bindFramebuffer();
    gl::setViewport(myFbo.getBounds() );
    gl::setMatricesWindow( myFbo.getSize(), false );
	
	// clear out the FBO with blue
	gl::clear();
   mParticleController.update();
    mParticleController.draw();
    
}

void	KinectEcard::snapshot(){
	gl::Fbo fbo( 640, 480, false );

	// render stored depth FBO
	fbo.bindFramebuffer();
	gl::pushMatrices();
		gl::clear( Color::black() );
		gl::color( Color::white() );
		gl::setMatricesWindowPersp( fbo.getSize() );

		mDepthCompareShader.bind();

		mDepthCompareShader.uniform( "tex0", 0 );
		mDepthCompareShader.uniform( "tex1", 1 );

		mDepthFbo.bindTexture(0);
		mStoredDepthFbo.bindTexture(1);

		gl::translate( 0, 480 );
		gl::scale( 1, -1 );

		gl::drawSolidRect( fbo.getBounds() );

		mDepthCompareShader.unbind();
	gl::popMatrices();
	fbo.unbindFramebuffer();

	// save stored depth fbo
	fbo.blitTo( mStoredDepthFbo, fbo.getBounds(), mStoredDepthFbo.getBounds() );

	// render substracted video fbo
	fbo.bindFramebuffer();
	gl::pushMatrices();
		gl::clear( Color::black() );
		gl::color( Color::white() );
		gl::setMatricesWindowPersp( mSubstractedVideoFbo.getSize() );
		gl::draw( mSubstractedVideoFbo.getTexture() );
	gl::popMatrices();
	fbo.unbindFramebuffer();

	// save it
	fbo.blitTo( mStoredVideoFbo, fbo.getBounds(), mStoredVideoFbo.getBounds() );
}

void StarsApp::createFbo()
{
	// determine the size of the frame buffer
	int w = getWindowWidth() * 2;
	int h = getWindowHeight() * 2;

	if( mFbo && mFbo.getSize() == Vec2i(w, h) )
		return;

	// create the FBO
	gl::Fbo::Format fmt;
	fmt.setWrap( GL_REPEAT, GL_CLAMP_TO_BORDER );
	
	mFbo = gl::Fbo( w, h, fmt );

	// work-around for the flipped texture issue
	mFbo.getTexture().setFlipped();
	mFbo.getDepthTexture().setFlipped();
}

void Grove::copyBlur(gl::Fbo& source, gl::Fbo& target, Vec2f sampleOffset)
{
	// bind the blur shader
	mBlurShader.bind();
	mBlurShader.uniform("tex0", 0); // use texture unit 0
	mBlurShader.uniform("sampleOffset", sampleOffset);

	// copy a horizontally blurred version of our scene into the first blur Fbo
	gl::setViewport( target.getBounds() );
	target.bindFramebuffer();
		source.bindTexture(0);
		gl::pushMatrices();
		gl::setMatricesWindow(target.getSize(), false);
			gl::clear( Color::black() );
			gl::drawSolidRect( target.getBounds() );
		gl::popMatrices();
		source.unbindTexture();
	target.unbindFramebuffer();	

	// unbind the shader
	mBlurShader.unbind();
}

void SmoothDisplacementMappingApp::renderNormalMap()
{
	if( mNormalMapShader && mNormalMapFbo ) 
	{
		mNormalMapFbo.bindFramebuffer();
		{
			// setup viewport and matrices 
			glPushAttrib( GL_VIEWPORT_BIT );
			gl::setViewport( mNormalMapFbo.getBounds() );

			gl::pushMatrices();
			gl::setMatricesWindow( mNormalMapFbo.getSize(), false );

			// clear the color buffer
			gl::clear();			

			// bind the displacement map
			mDispMapFbo.getTexture().bind(0);

			// render the normal map
			mNormalMapShader.bind();
			mNormalMapShader.uniform( "texture", 0 );
			mNormalMapShader.uniform( "amplitude", 4.0f );

			Area bounds = mNormalMapFbo.getBounds(); //bounds.expand(-1, -1);
			gl::drawSolidRect( bounds );

			mNormalMapShader.unbind();

			// clean up after ourselves
			mDispMapFbo.getTexture().unbind();

			gl::popMatrices();

			glPopAttrib();
		}
		mNormalMapFbo.unbindFramebuffer();
	}
}