XII Release 0.1.0
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xiiImage Class Reference

A class containing image data and associated meta data. More...

#include <Image.h>

Inheritance diagram for xiiImage:
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Public Member Functions

 XII_DECLARE_MEM_RELOCATABLE_TYPE ()
 
 xiiImage ()
 Constructs an empty image.
 
 xiiImage (xiiImage &&other)
 Move constructor.
 
void operator= (xiiImage &&rhs)
 
void Clear ()
 Constructs an empty image. If the image is attached to an external storage, the attachment is discarded.
 
void ResetAndAlloc (const xiiImageHeader &header)
 Constructs an image with the given header and ensures sufficient storage is allocated.
 
void ResetAndUseExternalStorage (const xiiImageHeader &header, xiiByteBlobPtr externalData)
 Constructs an image with the given header and attaches to the user-supplied external storage.
 
void ResetAndMove (xiiImage &&other)
 Moves the given data into this object.
 
void ResetAndCopy (const xiiImageView &other)
 Constructs from an image view. Copies the image data to internal storage.
 
xiiResult LoadFrom (xiiStringView sFileName)
 Convenience function to load the image from the given file.
 
xiiResult Convert (xiiImageFormat::Enum targetFormat)
 Convenience function to convert the image to the given format.
 
template<typename T>
xiiBlobPtr< T > GetBlobPtr ()
 Returns a view to the entire data contained in this image.
 
xiiByteBlobPtr GetByteBlobPtr ()
 
xiiImage GetSubImageView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0)
 Returns a view to the given sub-image.
 
xiiImage GetPlaneView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 uiPlaneIndex=0)
 Returns a view to a sub-plane.
 
xiiImage GetSliceView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0)
 Returns a view to z slice of the image.
 
xiiImage GetRowView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0)
 Returns a view to a row of pixels resp. blocks.
 
template<typename T>
T * GetPixelPointer (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 x=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0)
 Returns a pointer to a given pixel or block contained in a sub-image.
 
template<typename T>
xiiBlobPtr< const T > GetBlobPtr () const
 Returns a view to the entire data contained in this image.
 
xiiConstByteBlobPtr GetByteBlobPtr () const
 
xiiImageView GetSubImageView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0) const
 Returns a view to the given sub-image.
 
xiiImageView GetPlaneView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to a sub-plane.
 
xiiImageView GetSliceView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to z slice of the image.
 
xiiImageView GetRowView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to a row of pixels resp. blocks.
 
template<typename T>
const T * GetPixelPointer (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 x=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a pointer to a given pixel or block contained in a sub-image.
 
- Public Member Functions inherited from xiiImageView
 xiiImageView ()
 Constructs an empty image view.
 
 xiiImageView (const xiiImageHeader &header, xiiConstByteBlobPtr imageData)
 Constructs an image view with the given header and image data.
 
void Clear ()
 Constructs an empty image view.
 
bool IsValid () const
 Returns false if the image view does not reference any data yet.
 
void ResetAndViewExternalStorage (const xiiImageHeader &header, xiiConstByteBlobPtr imageData)
 Constructs an image view with the given header and image data.
 
xiiResult SaveTo (xiiStringView sFileName) const
 Convenience function to save the image to the given file.
 
const xiiImageHeaderGetHeader () const
 Returns the header this image was constructed from.
 
template<typename T>
xiiBlobPtr< const T > GetBlobPtr () const
 Returns a view to the entire data contained in this image.
 
xiiConstByteBlobPtr GetByteBlobPtr () const
 
xiiImageView GetSubImageView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0) const
 Returns a view to the given sub-image.
 
xiiImageView GetPlaneView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to a sub-plane.
 
xiiImageView GetSliceView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to z slice of the image.
 
xiiImageView GetRowView (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a view to a row of pixels resp. blocks.
 
template<typename T>
const T * GetPixelPointer (xiiUInt32 uiMipLevel=0, xiiUInt32 uiFace=0, xiiUInt32 uiArrayIndex=0, xiiUInt32 x=0, xiiUInt32 y=0, xiiUInt32 z=0, xiiUInt32 uiPlaneIndex=0) const
 Returns a pointer to a given pixel or block contained in a sub-image.
 
void ReinterpretAs (xiiImageFormat::Enum format)
 Reinterprets the image with a given format; the format must have the same size in bits per pixel as the current one.
 
xiiUInt32 GetDepth (xiiUInt32 uiMipLevel=0) const
 Returns the image depth for a given mip level, clamped to 1.
 
xiiUInt32 GetHeight (xiiUInt32 uiMipLevel=0) const
 Returns the image height for a given mip level, clamped to 1.
 
xiiUInt32 GetWidth (xiiUInt32 uiMipLevel=0) const
 Returns the image width for a given mip level, clamped to 1.
 
xiiUInt32 GetNumArrayIndices () const
 Returns the number of array indices.
 
xiiUInt32 GetNumFaces () const
 Returns the number of cubemap faces, or 1 for a non-cubemap.
 
xiiUInt32 GetNumMipLevels () const
 Returns the number of mip levels, including the full-size image.
 
xiiUInt32 GetPlaneCount () const
 Returns the number of image planes.
 
xiiImageFormat::Enum GetImageFormat () const
 Returns the image format.
 
xiiUInt32 GetNumBlocksX (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the horizontal direction.
 
xiiUInt32 GetNumBlocksY (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the horizontal direction.
 
xiiUInt32 GetNumBlocksZ (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the depth direction.
 
xiiUInt64 GetDepthPitch (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the offset in bytes between two subsequent depth slices of the given mip level.
 
xiiUInt64 GetRowPitch (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the offset in bytes between two subsequent rows of the given mip level.
 

Additional Inherited Members

- Protected Member Functions inherited from xiiImageView
xiiUInt64 ComputeLayout ()
 
void ValidateSubImageIndices (xiiUInt32 uiMipLevel, xiiUInt32 uiFace, xiiUInt32 uiArrayIndex, xiiUInt32 uiPlaneIndex) const
 
template<typename T>
void ValidateDataTypeAccessor (xiiUInt32 uiPlaneIndex) const
 
const xiiUInt64 & GetSubImageOffset (xiiUInt32 uiMipLevel, xiiUInt32 uiFace, xiiUInt32 uiArrayIndex, xiiUInt32 uiPlaneIndex) const
 
- Protected Member Functions inherited from xiiImageHeader
 xiiImageHeader ()
 Constructs an image using an unknown format and zero size.
 
void Clear ()
 Constructs an image using an unknown format and zero size.
 
void SetImageFormat (const xiiImageFormat::Enum &format)
 Sets the image format.
 
xiiImageFormat::Enum GetImageFormat () const
 Returns the image format.
 
void SetWidth (xiiUInt32 uiWidth)
 Sets the image width.
 
xiiUInt32 GetWidth (xiiUInt32 uiMipLevel=0) const
 Returns the image width for a given mip level, clamped to 1.
 
void SetHeight (xiiUInt32 uiHeight)
 Sets the image height.
 
xiiUInt32 GetHeight (xiiUInt32 uiMipLevel=0) const
 Returns the image height for a given mip level, clamped to 1.
 
void SetDepth (xiiUInt32 uiDepth)
 Sets the image depth. The default is 1.
 
xiiUInt32 GetDepth (xiiUInt32 uiMipLevel=0) const
 Returns the image depth for a given mip level, clamped to 1.
 
void SetNumMipLevels (xiiUInt32 uiNumMipLevels)
 Sets the number of mip levels, including the full-size image.
 
xiiUInt32 GetNumMipLevels () const
 Returns the number of mip levels, including the full-size image.
 
void SetNumFaces (xiiUInt32 uiNumFaces)
 Sets the number of cubemap faces. Use 1 for a non-cubemap.
 
xiiUInt32 GetNumFaces () const
 Returns the number of cubemap faces, or 1 for a non-cubemap.
 
void SetNumArrayIndices (xiiUInt32 uiNumArrayIndices)
 Sets the number of array indices.
 
xiiUInt32 GetNumArrayIndices () const
 Returns the number of array indices.
 
xiiUInt32 GetPlaneCount () const
 Returns the number of image planes.
 
xiiUInt32 GetNumBlocksX (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the horizontal direction.
 
xiiUInt32 GetNumBlocksY (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the horizontal direction.
 
xiiUInt32 GetNumBlocksZ (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the number of blocks contained in a given mip level in the depth direction.
 
xiiUInt64 GetRowPitch (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the offset in bytes between two subsequent rows of the given mip level.
 
xiiUInt64 GetDepthPitch (xiiUInt32 uiMipLevel=0, xiiUInt32 uiPlaneIndex=0) const
 Returns the offset in bytes between two subsequent depth slices of the given mip level.
 
xiiUInt64 ComputeDataSize () const
 Computes the data size required for an image with the header's format and dimensions.
 
xiiUInt32 ComputeNumberOfMipMaps () const
 Computes the number of mip maps in the full mip chain.
 
bool operator== (const xiiImageHeader &other) const
 
- Protected Attributes inherited from xiiImageView
xiiHybridArray< xiiUInt64, 16 > m_SubImageOffsets
 
xiiBlobPtr< xiiUInt8 > m_DataPtr
 
- Protected Attributes inherited from xiiImageHeader
xiiUInt32 m_uiNumMipLevels
 
xiiUInt32 m_uiNumFaces
 
xiiUInt32 m_uiNumArrayIndices
 
xiiUInt32 m_uiWidth
 
xiiUInt32 m_uiHeight
 
xiiUInt32 m_uiDepth
 
xiiImageFormat::Enum m_Format
 

Detailed Description

A class containing image data and associated meta data.

This class is a lightweight container for image data and the description required for interpreting the data, such as the image format, its dimensions, number of sub-images (i.e. cubemap faces, mip levels and array sub-images). However, it does not provide any methods for interpreting or modifying of the image data.

The sub-images are stored in a predefined order compatible with the layout of DDS files, that is, it first stores the mip chain for each image, then all faces in a case of a cubemap, then the individual images of an image array.

Member Function Documentation

◆ ResetAndAlloc()

void xiiImage::ResetAndAlloc ( const xiiImageHeader & header)

Constructs an image with the given header and ensures sufficient storage is allocated.

Note
If this xiiImage was previously attached to external storage, this will reuse that storage. However, if the external storage is not sufficiently large, ResetAndAlloc() will detach from it and allocate internal storage.

◆ ResetAndCopy()

void xiiImage::ResetAndCopy ( const xiiImageView & other)

Constructs from an image view. Copies the image data to internal storage.

If the image is currently attached to external storage, the attachment is discarded.

◆ ResetAndMove()

void xiiImage::ResetAndMove ( xiiImage && other)

Moves the given data into this object.

If other is attached to an external storage, this object will also be attached to it, so life-time requirements for the external storage are now bound to this instance.

◆ ResetAndUseExternalStorage()

void xiiImage::ResetAndUseExternalStorage ( const xiiImageHeader & header,
xiiByteBlobPtr externalData )

Constructs an image with the given header and attaches to the user-supplied external storage.

The user is responsible to keep the external storage alive as long as this xiiImage is alive.


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