inviwo::CanvasGL Class Reference

Inheritance diagram for inviwo::CanvasGL:

Public Member Functions
virtual size2_t	getCanvasDimensions () const =0
double	getDepthValueAtCoord (ivec2 canvasCoordinate) const
	Retrieve depth value in normalized device coordinates at screen coordinate.
double	getDepthValueAtNormalizedCoord (dvec2 normalizedScreenCoordinate) const
virtual size2_t	getImageDimensions () const
virtual void	glSwapBuffers ()=0
virtual void	render (std::shared_ptr< const Image > image, LayerType layerType=LayerType::Color, size_t idx=0) override
virtual void	update () override
Public Member Functions inherited from inviwo::Canvas
virtual void	activate ()=0
virtual ContextID	activeContext () const =0
virtual ContextID	contextId () const =0
virtual std::unique_ptr< Canvas >	createHiddenCanvas ()=0
virtual void	releaseContext ()=0
void	setEventPropagator (EventPropagator *propagator)

Static Public Member Functions
static void	defaultGLState ()

Protected Member Functions
void	drawSquare ()
bool	ready ()
void	renderLayer ()
void	renderNoise ()
void	renderTexture (int)
void	setupDebug ()

Protected Attributes
std::weak_ptr< const Image >	image_
size_t	layerIdx_ = 0
LayerType	layerType_ = LayerType::Color
Shader *	noiseShader_ = nullptr
	non-owning reference
bool	ready_ = false
std::unique_ptr< Mesh >	square_
const MeshGL *	squareGL_ = nullptr
	Non-owning reference.
Shader *	textureShader_ = nullptr
	non-owning reference
Protected Attributes inherited from inviwo::Canvas
PickingController	pickingController_
EventPropagator *	propagator_

Additional Inherited Members
Public Types inherited from inviwo::Canvas
using	ContextID = const void*

Member Function Documentation

getDepthValueAtCoord()

double inviwo::CanvasGL::getDepthValueAtCoord

(

ivec2

canvasCoordinate

)

const

Retrieve depth value in normalized device coordinates at screen coordinate.

Depth is defined in [-1 1], where -1 is the near plane and 1 is the far plane. Will be 1 if no depth value is available.

Parameters

canvasCoordinate

Canvas coordinates [0 dim-1]^2

Returns

NDC depth in [-1 1], 1 if no depth value exist.

ready()

bool inviwo::CanvasGL::ready ( )

protected

Sometime on OSX in renderNoise when on the first time using a canvas we get a INVALID_FRAMEBUFFER_OPERATION error to avoid this we have this ready flag to check that the frame buffer is complete.

render()

virtual void inviwo::CanvasGL::render ( std::shared_ptr< const Image > image, LayerType layerType = LayerType::Color, size_t idx = 0 )

overridevirtual

Implements inviwo::Canvas.

update()

virtual void inviwo::CanvasGL::update ( )

overridevirtual

Implements inviwo::Canvas.

Member Data Documentation

squareGL_

const MeshGL* inviwo::CanvasGL::squareGL_ = nullptr

protected

Non-owning reference.

Each canvas must have its own MeshGL since the vertex array object in MeshGL cannot be shared.

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

• modules/opengl/include/modules/opengl/canvasgl.h