HioImage Class Reference

#include <image.h>

Classes
class	StorageSpec

Public Types
enum	ImageOriginLocation { OriginUpperLeft, OriginLowerLeft }
enum	SourceColorSpace { Raw, SRGB, Auto }

Public Member Functions
	HioImage ()=default
virtual HIO_API	~HioImage ()
	HioImage (const HioImage &)=delete
HioImage &	operator= (const HioImage &)=delete

Static Public Member Functions
static HIO_API bool	IsSupportedImageFile (std::string const &filename)
	Returns whether filename opened as a texture image. More...

Reading
{@
virtual bool	Read (StorageSpec const &storage)=0
	Reads the image file into storage. More...
virtual bool	ReadCropped (int const cropTop, int const cropBottom, int const cropLeft, int const cropRight, StorageSpec const &storage)=0
	Reads the cropped sub-image into storage. More...
static HIO_API HioImageSharedPtr	OpenForReading (std::string const &filename, int subimage=0, int mip=0, SourceColorSpace sourceColorSpace=SourceColorSpace::Auto, bool suppressErrors=false)

Writing
}@ {@
virtual bool	Write (StorageSpec const &storage, VtDictionary const &metadata=VtDictionary())=0
	Writes the image with metadata. More...
virtual std::string const &	GetFilename () const =0
	}@ More...
virtual int	GetWidth () const =0
	Returns the image width. More...
virtual int	GetHeight () const =0
	Returns the image height. More...
virtual HioFormat	GetFormat () const =0
	Returns the destination HioFormat. More...
virtual int	GetBytesPerPixel () const =0
	Returns the number of bytes per pixel. More...
virtual int	GetNumMipLevels () const =0
	Returns the number of mips available. More...
virtual bool	IsColorSpaceSRGB () const =0
	Returns whether the image is in the sRGB color space. More...
static HIO_API HioImageSharedPtr	OpenForWriting (std::string const &filename)
	Opens filename for writing from the given storage. More...

Metadata
{@
template<typename T >
bool	GetMetadata (TfToken const &key, T *value) const
	}@ More...
virtual bool	GetMetadata (TfToken const &key, VtValue *value) const =0
	}@ More...
virtual bool	GetSamplerMetadata (HioAddressDimension dim, HioAddressMode *param) const =0
	}@ More...
virtual bool	_OpenForReading (std::string const &filename, int subimage, int mip, SourceColorSpace sourceColorSpace, bool suppressErrors)=0
	}@ More...
virtual bool	_OpenForWriting (std::string const &filename)=0
	}@ More...

Detailed Description

A base class for reading and writing texture image data.

The class allows basic access to texture image file data.

Texture paths are UTF-8 strings, resolvable by AR. Texture system dispatch is driven by extension, with [A-Z] (and no other characters) case folded.

Definition at line 54 of file image.h.

Member Enumeration Documentation

enum HioImage::ImageOriginLocation

Specifies whether to treat the image origin as the upper-left corner or the lower left

Enumerator
OriginUpperLeft
OriginLowerLeft

Definition at line 60 of file image.h.

enum HioImage::SourceColorSpace

Specifies the source color space in which the texture is encoded, with "Auto" indicating the texture reader should determine color space based on hints from the image (e.g. file type, number of channels, image metadata)

Enumerator
Raw
SRGB
Auto

Definition at line 70 of file image.h.

Constructor & Destructor Documentation

HioImage::HioImage ( )

default

virtual HIO_API HioImage::~HioImage ( )

virtual

HioImage::HioImage ( const HioImage &  )

delete

Member Function Documentation

virtual bool HioImage::_OpenForReading ( std::string const &  filename, int  subimage, int  mip, SourceColorSpace  sourceColorSpace, bool  suppressErrors  )

protectedpure virtual

}@

virtual bool HioImage::_OpenForWriting ( std::string const &  filename )

protectedpure virtual

}@

virtual int HioImage::GetBytesPerPixel ( ) const

pure virtual

Returns the number of bytes per pixel.

virtual std::string const& HioImage::GetFilename ( ) const

pure virtual

}@

Returns the image filename.

virtual HioFormat HioImage::GetFormat ( ) const

pure virtual

Returns the destination HioFormat.

virtual int HioImage::GetHeight ( ) const

pure virtual

Returns the image height.

template<typename T >

bool HioImage::GetMetadata	(	TfToken const &	key,
		T *	value
	)		const

}@

Definition at line 194 of file image.h.

virtual bool HioImage::GetMetadata ( TfToken const &  key, VtValue *  value  ) const

pure virtual

}@

virtual int HioImage::GetNumMipLevels ( ) const

pure virtual

Returns the number of mips available.

virtual bool HioImage::GetSamplerMetadata ( HioAddressDimension  dim, HioAddressMode *  param  ) const

pure virtual

}@

virtual int HioImage::GetWidth ( ) const

pure virtual

Returns the image width.

virtual bool HioImage::IsColorSpaceSRGB ( ) const

pure virtual

Returns whether the image is in the sRGB color space.

static HIO_API bool HioImage::IsSupportedImageFile ( std::string const &  filename )

static

Returns whether filename opened as a texture image.

static HIO_API HioImageSharedPtr HioImage::OpenForReading ( std::string const &  filename, int  subimage = 0, int  mip = 0, SourceColorSpace  sourceColorSpace = SourceColorSpace::Auto, bool  suppressErrors = false  )

static

Opens filename for reading from the given subimage at mip level mip, using sourceColorSpace to help determine the color space with which to interpret the texture

static HIO_API HioImageSharedPtr HioImage::OpenForWriting ( std::string const &  filename )

static

Opens filename for writing from the given storage.

HioImage& HioImage::operator= ( const HioImage &  )

delete

virtual bool HioImage::Read ( StorageSpec const &  storage )

pure virtual

Reads the image file into storage.

virtual bool HioImage::ReadCropped ( int const  cropTop, int const  cropBottom, int const  cropLeft, int const  cropRight, StorageSpec const &  storage  )

pure virtual

Reads the cropped sub-image into storage.

virtual bool HioImage::Write ( StorageSpec const &  storage, VtDictionary const &  metadata = VtDictionary()  )

pure virtual

Writes the image with metadata.

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

• pxr/imaging/hio/image.h