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Usage
Provides low-level access to GPU memory. Used to pass raw
data to GPU. The data is uploaded into a pixel buffer.
To create an instance of class vtkPixelBufferObject, simply
invoke its constructor as follows
obj = vtkPixelBufferObject
Methods
The class vtkPixelBufferObject has several methods that can
be used. They are listed below. Note that the documentation
is translated automatically from the VTK sources, and may
not be completely intelligible. When in doubt, consult the
VTK website. In the methods listed below, obj is an instance
of the vtkPixelBufferObject class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkPixelBufferObject = obj.NewInstance ()
* vtkPixelBufferObject = obj.SafeDownCast (vtkObject o)
* obj.SetContext (vtkRenderWindow context) - Get/Set the
context. Context must be a vtkOpenGLRenderWindow. This
does not increase the reference count of the context to
avoid reference loops. SetContext() may raise an error is
the OpenGL context does not support the required OpenGL
extensions.
* vtkRenderWindow = obj.GetContext () - Get/Set the context.
Context must be a vtkOpenGLRenderWindow. This does not
increase the reference count of the context to avoid
reference loops. SetContext() may raise an error is the
OpenGL context does not support the required OpenGL
extensions.
* int = obj.GetUsage () - Usage is a performance hint. Valid
values are:
o StreamDraw specified once by A, used few times S
o StreamRead specified once by R, queried a few times by A
o StreamCopy specified once by R, used a few times S
o StaticDraw specified once by A, used many times S
o StaticRead specificed once by R, queried many times by A
o StaticCopy specified once by R, used many times S
o DynamicDraw respecified repeatedly by A, used many times
S
o DynamicRead respecified repeatedly by R, queried many
times by A
o DynamicCopy respecified repeatedly by R, used many times
S A: the application S: as the source for GL drawing and
image specification commands. R: reading data from the
GL Initial value is StaticDraw, as in OpenGL spec.
* obj.SetUsage (int ) - Usage is a performance hint. Valid
values are:
o StreamDraw specified once by A, used few times S
o StreamRead specified once by R, queried a few times by A
o StreamCopy specified once by R, used a few times S
o StaticDraw specified once by A, used many times S
o StaticRead specificed once by R, queried many times by A
o StaticCopy specified once by R, used many times S
o DynamicDraw respecified repeatedly by A, used many times
S
o DynamicRead respecified repeatedly by R, queried many
times by A
o DynamicCopy respecified repeatedly by R, used many times
S A: the application S: as the source for GL drawing and
image specification commands. R: reading data from the
GL Initial value is StaticDraw, as in OpenGL spec.
* int = obj.GetType () - Get the type with which the data is
loaded into the GPU. eg. VTK_FLOAT for float32, VTK_CHAR
for byte, VTK_UNSIGNED_CHAR for unsigned byte etc.
* int = obj.GetSize () - Get the size of the data loaded
into the GPU. Size is in the number of elements of the
uploaded Type.
* int = obj.GetHandle () - Get the openGL buffer handle.
* obj.BindToPackedBuffer ()
* obj.BindToUnPackedBuffer () - Inactivate the buffer.
* obj.UnBind () - Inactivate the buffer.
* FreeMat_Documentation
* Visualization_Toolkit_Rendering_Classes
* Generated on Thu Jul 25 2013 17:18:35 for FreeMat by
doxygen_ 1.8.1.1
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