C++ Fbo::getTexture方法代码示例

void ShaderToyApp::resize()
{
	// Create/resize frame buffers (no multisampling)
	mBufferCurrent = gl::Fbo( getWindowWidth(), getWindowHeight() );
	mBufferNext = gl::Fbo( getWindowWidth(), getWindowHeight() );

	mBufferCurrent.getTexture().setFlipped(true);
	mBufferNext.getTexture().setFlipped(true);
}

/* 
 * @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 FBOMultipleTargetsApp::draw()
{
	// clear the window to gray
	gl::clear( Color( 0.35f, 0.35f, 0.35f ) );

	// set the viewport to match our window
	gl::setViewport( getWindowBounds() );

	// draw the two textures we've created side-by-side
	gl::setMatricesWindow( getWindowSize() );
	gl::draw( mFbo.getTexture(0), mFbo.getTexture(0).getBounds() );
	gl::draw( mFbo.getTexture(1), mFbo.getTexture(1).getBounds() + Vec2f(mFbo.getTexture(0).getWidth(),0) );
}

void GroupingApp::setup() {
	fbo = gl::Fbo(getWindowWidth(), getWindowHeight());
	
	gui = new SimpleGUI(this, Font(loadResource(RES_SGUI_FONT), 8));
	gui->lightColor = ColorA(1, 1, 0, 1);	
	gui->addColumn();
	gui->addLabel("CONTROLS");
	gui->addParam("Rotation", &rotation, 0, 360, 0);
	gui->addParam("Size", &size, 100, 600, 200); 	
	gui->addParam("Color", &color, ColorA(0,0.5,1,0.5), SimpleGUI::RGB); //use R,G,B,A sliders
	gui->addColumn();	
	gui->addLabel("RENDER TYPE");
	gui->addParam("Fill", &fill, true, RENDER_TYPE_GROUP); //if we specify group id, we create radio button set
	gui->addParam("Stroke", &stroke, false, RENDER_TYPE_GROUP); //i.e. only one of the buttons can be active at any time	
	strokePanel = gui->addPanel();
	gui->addParam("Thickness", &thickness, 1, 10);
	gui->addColumn();
	gui->addLabel("OPTIONS");
	gui->addParam("Auto Rotation", &autoRotation, false); 	
	gui->addColumn();
	gui->addLabel("PREVIEW");
	gui->addParam("PreviewTex", &fbo.getTexture()); 	
	
	gui->load(CONFIG_FILE); //we load settings after specifying all the 
	//params because we need to know their name and type
	
	timer.start();
	prevTime = timer.getSeconds();
	
	
}

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 RepulsionApp::setFboVelocities( gl::Fbo &fbo )
{
	Surface32f vel( fbo.getTexture() );
	Surface32f::Iter it = vel.getIter();
	while( it.line() ){
		while( it.pixel() ){
			Vec3f r = Rand::randVec3f() * 0.1f;
			it.r() = 0.0f;//r.x;
			it.g() = 0.0f;//r.y;
			it.b() = 0.0f;//r.z;
			it.a() = 0.0f;
		}
	}
	
	gl::Texture velTexture( vel );
	velTexture.bind();
	
	gl::setMatricesWindow( mFboSize, false );
	gl::setViewport( mFboBounds );
	
	fbo.bindFramebuffer();
	mVelInitShader.bind();
	mVelInitShader.uniform( "initTex", 0 );
	gl::drawSolidRect( mFboBounds );
	mVelInitShader.unbind();
	fbo.unbindFramebuffer();
}

void LEDCamApp::draw()
{
	// clear out the window with black
	gl::clear( kClearColor ); 
	
	if( !mTexture ) return;
	mFbo.bindFramebuffer();
	mTexture.enableAndBind();
	mShader.bind();
	float aspect = kWindowHeight/kWindowWidth;
	cout << "Aspect: " << aspect << " \n";
	mShader.uniform( "aspect", aspect );
	mShader.uniform( "tex", 0 );
	mShader.uniform( "bright", 3.0f );
	mShader.uniform( "spacing", 3 );
	mShader.uniform( "ledCount", 100.0f );
	gl::drawSolidRect( getWindowBounds() );
	mTexture.unbind();
	mShader.unbind();
	mFbo.unbindFramebuffer();
	
	gl::Texture fboTexture = mFbo.getTexture();
	fboTexture.setFlipped();
	gl::draw( fboTexture );

}

void FBOBasicApp::draw()
{
	// clear the window to gray
	gl::clear( Color( 0.35f, 0.35f, 0.35f ) );

	// setup our camera to render the cube
	CameraPersp cam( getWindowWidth(), getWindowHeight(), 60.0f );
	cam.setPerspective( 60, getWindowAspectRatio(), 1, 1000 );
	cam.lookAt( Vec3f( 2.6f, 1.6f, -2.6f ), Vec3f::zero() );
	gl::setMatrices( cam );

	// set the viewport to match our window
	gl::setViewport( getWindowBounds() );

	// use the scene we rendered into the FBO as a texture
	glEnable( GL_TEXTURE_2D );
	mFbo.bindTexture();

	// draw a cube textured with the FBO
	gl::color( Color::white() );
	gl::drawCube( Vec3f::zero(), Vec3f( 2.2f, 2.2f, 2.2f ) );

	// show the FBO texture in the upper left corner
	gl::setMatricesWindow( getWindowSize() );
	gl::draw( mFbo.getTexture(0), Rectf( 0, 0, 96, 96 ) );
	
#if ! defined( CINDER_GLES ) // OpenGL ES can't do depth textures, otherwise draw the FBO's
	gl::draw( mFbo.getDepthTexture(), Rectf( 96, 0, 96 + 96, 96 ) );
#endif
}

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();
}

/* 
 * @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() );
}

void syphonImpApp::draw()
{
	gl::enableAlphaBlending();
	gl::clear( Color( 0.1f, 0.1f, 0.1f ) );

    renderSceneToFbo();
    mTextureSyphon.publishTexture(&myFbo.getTexture()); //publish our texture

    Vec2f upperLeftCorner = Vec2f( 0, WIDTH );
    Vec2f lowerRightCorner = Vec2f(WIDTH,WIDTH-(WIDTH/1.33) );
    Rectf rect = Rectf( upperLeftCorner, lowerRightCorner );
    gl::draw( myFbo.getTexture(0),rect);


	

}

void Narcotic::draw()
{
	
	gl::clear();
	fboProjection.bindFramebuffer();
	gl::clear(Color::gray(0.25));
	v1.draw();
	fboProjection.unbindFramebuffer();
	gl::draw(fboProjection.getTexture(), Rectf(projectionWindow->getBounds()));
	//fboProjection.unbindTexture();
}

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();
	}
}