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src/Source/OpenEXR/IlmImf/ImfStandardAttributes.h  view on Meta::CPAN

//
// multiView -- defines the view names for multi-view image files.
// A multi-view image contains two or more views of the same scene,
// as seen from different viewpoints, for example a left-eye and
// a right-eye view for stereo displays.  The multiView attribute
// lists the names of the views in an image, and a naming convention
// identifies the channels that belong to each view.
//
// For details, please see header file ImfMultiView.h
//

IMF_STD_ATTRIBUTE_DEF (multiView , MultiView, StringVector)


// 
// worldToCamera -- for images generated by 3D computer graphics rendering,
// a matrix that transforms 3D points from the world to the camera coordinate
// space of the renderer.
// 
// The camera coordinate space is left-handed.  Its origin indicates the
// location of the camera.  The positive x and y axes correspond to the
// "right" and "up" directions in the rendered image.  The positive z
// axis indicates the camera's viewing direction.  (Objects in front of
// the camera have positive z coordinates.)
// 
// Camera coordinate space in OpenEXR is the same as in Pixar's Renderman.
// 

IMF_STD_ATTRIBUTE_DEF (worldToCamera, WorldToCamera, IMATH_NAMESPACE::M44f)


// 
// worldToNDC -- for images generated by 3D computer graphics rendering, a
// matrix that transforms 3D points from the world to the Normalized Device
// Coordinate (NDC) space of the renderer.
// 
// NDC is a 2D coordinate space that corresponds to the image plane, with
// positive x and pointing to the right and y positive pointing down.  The
// coordinates (0, 0) and (1, 1) correspond to the upper left and lower right
// corners of the OpenEXR display window.
// 
// To transform a 3D point in word space into a 2D point in NDC space,
// multiply the 3D point by the worldToNDC matrix and discard the z
// coordinate.
// 
// NDC space in OpenEXR is the same as in Pixar's Renderman.
// 

IMF_STD_ATTRIBUTE_DEF (worldToNDC, WorldToNDC, IMATH_NAMESPACE::M44f)


//
// deepImageState -- specifies whether the pixels in a deep image are
// sorted and non-overlapping.
//
// Note: this attribute can be set by application code that writes a file
// in order to tell applications that read the file whether the pixel data
// must be cleaned up prior to image processing operations such as flattening. 
// The IlmImf library does not verify that the attribute is consistent with
// the actual state of the pixels.  Application software may assume that the
// attribute is valid, as long as the software will not crash or lock up if
// any pixels are inconsistent with the deepImageState attribute.
//

IMF_STD_ATTRIBUTE_DEF (deepImageState, DeepImageState, DeepImageState)


//
// originalDataWindow -- if application software crops an image, then it
// should save the data window of the original, un-cropped image in the
// originalDataWindow attribute.
//

IMF_STD_ATTRIBUTE_DEF
    (originalDataWindow, OriginalDataWindow, IMATH_NAMESPACE::Box2i)


//
// dwaCompressionLevel -- sets the quality level for images compressed
// with the DWAA or DWAB method.
//

IMF_STD_ATTRIBUTE_DEF (dwaCompressionLevel, DwaCompressionLevel, float)


#endif