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tlp::GlOffscreenRenderer Class Reference

Render a scene in an image or in a texture. More...

#include <GlOffscreenRenderer.h>

Collaboration diagram for tlp::GlOffscreenRenderer:

List of all members.

Public Member Functions

  • ~GlOffscreenRenderer ()
  • void setViewPortSize (const unsigned int viewPortWidth, const unsigned int viewPortHeight)
    Define the viewport size.
  • unsigned int getViewportWidth ()
  • unsigned int getViewportHeight ()
  • bool frameBufferOk () const
  • GlScene * getScene ()
  • void setZoomFactor (double zoomFactor)
  • void setCameraCenter (const Coord &cameraCenter)
  • void setSceneBackgroundColor (const Color &color)
  • void addGlEntityToScene (GlSimpleEntity *entity)
    Add an entity to the scene. The scene become the owner of the object.
  • void addGraphCompositeToScene (GlGraphComposite *graphComposite)
    Add a graph composite to the scene. The scene become the owner of the object.
  • void addGraphToScene (Graph *graph)
    Add a graph to the scene. Just create a new GraphComposite and call GlGraphComposite.
  • void clearScene ()
    Delete all the elements of the scene and clear it.
  • void renderScene (const bool centerScene=true, const bool antialiased=false)
    Render the scene in a buffer. You need to call this function before getting the result with getImage or getGlTexture.
  • QImage getImage ()
    Generate a QImage from the scene. You need to call the renderScene function before this function.
  • GLuint getGLTexture (const bool generateMipMaps=false)
    Generate an open gl texture from the scene. You need to call the renderScene function before this function.

Static Public Member Functions


Detailed Description

Render a scene in an image or in a texture.

Here is an example to render a graph in a QImage to use it as preview.

 //Get the renderer
 glOffscreenRenderer *glOffscreenRenderer = GlOffscreenRenderer::getInstance();
 //Define the viewport size. Needed to initialize the offscreen rederer.
 glOffscreenRenderer->setViewPortSize(200,200);
 //Erase old elements
 glOffscreenRenderer->clearScene();
 //Change the background color of the scene to white
 glOffscreenRenderer->setSceneBackgroundColor(Color(255,255,255,255));
 //Add the graph to render.
 glOffscreenRenderer->addGraphToScene(graph);
 //Center and render the scene.
 glOffscreenRenderer->renderScene(true);
 //Get the result
 QImage preview = glOffscreenRenderer->getImage();

Constructor & Destructor Documentation

tlp::GlOffscreenRenderer::~GlOffscreenRenderer ( )

Member Function Documentation

void tlp::GlOffscreenRenderer::addGlEntityToScene ( GlSimpleEntity *  entity)

Add an entity to the scene. The scene become the owner of the object.

void tlp::GlOffscreenRenderer::addGraphCompositeToScene ( GlGraphComposite *  graphComposite)

Add a graph composite to the scene. The scene become the owner of the object.

void tlp::GlOffscreenRenderer::addGraphToScene ( Graph *  graph)

Add a graph to the scene. Just create a new GraphComposite and call GlGraphComposite.

void tlp::GlOffscreenRenderer::clearScene ( )

Delete all the elements of the scene and clear it.

bool tlp::GlOffscreenRenderer::frameBufferOk ( ) const [inline]
GLuint tlp::GlOffscreenRenderer::getGLTexture ( const bool  generateMipMaps = false)

Generate an open gl texture from the scene. You need to call the renderScene function before this function.

QImage tlp::GlOffscreenRenderer::getImage ( )

Generate a QImage from the scene. You need to call the renderScene function before this function.

static GlOffscreenRenderer* tlp::GlOffscreenRenderer::getInstance ( ) [static]

Get the renderer instance.

GlScene* tlp::GlOffscreenRenderer::getScene ( ) [inline]
unsigned int tlp::GlOffscreenRenderer::getViewportHeight ( )
unsigned int tlp::GlOffscreenRenderer::getViewportWidth ( )
void tlp::GlOffscreenRenderer::renderScene ( const bool  centerScene = true,
const bool  antialiased = false 
)

Render the scene in a buffer. You need to call this function before getting the result with getImage or getGlTexture.

void tlp::GlOffscreenRenderer::setCameraCenter ( const Coord &  cameraCenter) [inline]
void tlp::GlOffscreenRenderer::setSceneBackgroundColor ( const Color &  color)
void tlp::GlOffscreenRenderer::setViewPortSize ( const unsigned int  viewPortWidth,
const unsigned int  viewPortHeight 
)

Define the viewport size.

void tlp::GlOffscreenRenderer::setZoomFactor ( double  zoomFactor) [inline]


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