HiRISE
 PDS_JP2

Public Member Functions | Public Attributes | Static Public Attributes | Protected Member Functions | Protected Attributes

JP2_Decoder Class Reference

A JP2_Decoder decodes image pixel data from a JPEG2000 JP2 image file. More...

#include <JP2_Decoder.hh>

Collaboration diagram for JP2_Decoder:
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List of all members.

Public Member Functions

 JP2_Decoder ()
 Constructs a JP2_Decoder.
std::string source () const
 Get the JP2 source pathname.
JP2_Decodersource (const std::string &pathname)
 Set the pathname to the JP2 source.
Size_2D image_size () const
 Get the size of the JP2 source image.
unsigned int image_width () const
 Get the width of the JP2 source image.
unsigned int image_height () const
 Get the height of the JP2 source image.
unsigned int image_bands () const
 Get the number of bands (components) in the JP2 image.
unsigned int resolution_levels () const
 Get the total number of codestream resolution levels.
unsigned int pixel_bytes () const
 Get the number of bytes per pixel.
unsigned int pixel_bits () const
 Get the pixel precision.
bool signed_data () const
 Get the signedness of the pixel data.
unsigned char *const producer_UUID () const
 Get the UUID found in the JP2 source.
std::string URL () const
 Get the URL found in the JP2 source.
std::string destination () const
 Get the destination file pathname for the rendered image data.
JP2_Decoderdestination (const std::string &pathname)
 Set the destination file pathname for the rendered image data.
Size_2D rendered_size () const
 Get the size of the rendered image.
unsigned int rendered_width () const
 Get the width of the rendered image.
unsigned int rendered_height () const
 Get the height of the rendered image.
Rectangle image_region () const
 Get the image region that will be rendered from the JP2 source.
JP2_Decoderimage_region (const Rectangle &region)
 Set the image region that will be rendered from the JP2 source.
JP2_Decoderimage_region (int x, int y, int width, int height)
 Set the image region that will be rendered from the JP2 source.
unsigned int resolution_level () const
 Get the resolution level at which the codestream will be rendered.
JP2_Decoderresolution_level (unsigned int level)
 Set the resolution level at which the codestream will be rendered.
bool swap_pixel_bytes () const
 Tests if multi-byte pixels will be reordered before being written.
JP2_Decoderswap_pixel_bytes (bool swap_data)
 Sets whether multi-byte pixels will be reordered before being written.
unsigned long long bytes_written () const
 Get the number of image data bytes written.
bool ready () const
 Tests if the decoder has the information it needs to do its job.
std::string reasons () const
 Describe the reasons that the decoder is not ready.
unsigned long long decode ()
 Deocde the pixel data from the JPEG2000 JP2 source and write the rendered results to the image data destination.
void open ()
 Open the source JP2 file.
bool is_open () const
 Test if the decoder is open.
unsigned long long write_image_data ()
 Write rendered image data.
void close ()
 Close access to the JP2 source.
JP2_Decoder_Error * decoder_error () const

Public Attributes

static const int MAX_STRIPE_HEIGHT = 8192

Static Public Attributes

static const char *const ID = "UA::HiRISE::JP2_Decoder (1.20 2013/03/18 03:20:41)"
 Class identification name with source code version and date.
static const char *const UUID_INFO_BOX_NAME = "uinf"
 PDS label reference information UUID Info JP2 container box name.
static const char *const UUID_BOX_NAME = "ulst"
 Data provider UUID JP2 box name.
static const char *const URL_BOX_NAME = "url "
 PDS label relative filename URL JP2 box name.
static const int MIN_STRIPE_HEIGHT = 256
 Image data stripe minimum and maximum number of lines.
static const int DECODER_EXCEPTION = 67
 JP2_Decoder_Error exception signal value.

Protected Member Functions

std::streamsize write_stripe (std::ostream &destination, std::streamoff file_offset, int band, int line, int lines, kdu_int16 *buffer)
 Write an image data buffer with pixel data to a stream.
std::streamsize write_stripe (std::ostream &destination, std::streamoff file_offset, int band, int line, int lines, kdu_int32 *buffer)
 Write an image data buffer with pixel data to a stream.
void set_resolution_and_region (unsigned int level, const Rectangle &region)
 Set the effective rendering resolution level and image region.

Protected Attributes

std::string JP2_Pathname
 JP2 source pathname.
unsigned int Image_Bands
 Total image bands (components).
Size_2D Image_Size
 Dimensions of the source image.
unsigned int Pixel_Bytes
 Pixel datum size in bytes.
unsigned int Pixel_Bits
 Pixel precision bits.
bool Signed_Data
 Whether pixel data is signed.
unsigned int Resolution_Levels
 Resolution levels available.
unsigned char * UUID_Info_UUID
 First UUID value found in a UUID List box of a UUID Info super box.
std::string UUID_Info_URL
 First URL value found in a URL box of a UUID Info super box.
std::string Image_Destination
 Image data destination pathname.
Size_2D Rendered_Size
 Rendered image size.
Rectangle Image_Region
 Image region to be rendered.
unsigned int Resolution_Level
 Resolution level to render.
bool Swap_Pixel_Bytes
 Whether pixel bytes should be reordered when written.
unsigned long long Bytes_Written
 Total number of pixel bytes written.

Detailed Description

A JP2_Decoder decodes image pixel data from a JPEG2000 JP2 image file.

After a JP2_Decoder is constructed it must be configured. The decoder must be configured with at least an input JP2 source file before it can be opened. Once opened numerous accessors can be used to get information from the JP2 file, especially image data characterization. A JP2_Decoder may be configured to reorder muli-byte pixel data (the codestream is expected to produce MSB ordered data by default), decompress a selected region of the entire image or render at less than the full resolution level. It must also be configured with an output image data destination file to be ready to decode the source which includes opening the source and writing the image data.

A JP2_Decoder may be reused with or without between uses. Other than the source and destination, its configuration is reset to the default values whenever it is closed.

This implementation employs the Kakadu Software libraries.

Author:
Bradford Castalia, UA/HiROC
Version:
1.14

Constructor & Destructor Documentation

JP2_Decoder (  )

Constructs a JP2_Decoder.

The decoder must be configured with at least an input JP2 source before it can be opened. It must also be configured with an output image data destination to be ready to do its job.


Member Function Documentation

std::string source (  ) const [inline]

Get the JP2 source pathname.

Returns:
The pathname string for the JP2 source. This will be the empty string if no source has been bound to this JP2_Decoder.

References JP2_Decoder::JP2_Pathname.

Referenced by main().

JP2_Decoder & source ( const std::string &  pathname )

Set the pathname to the JP2 source.

N.B.: If the source has already been opened and the pathname is different than the previous pathname, the source is closed.

Parameters:
pathnameThe JP2 source pathname.
Returns:
This JP2_Decoder.
Size_2D image_size (  ) const [inline]

Get the size of the JP2 source image.

N.B.: Use the image_width() and image_height() methods for fast access to the image size values.

Returns:
A Size_2D object containing the image width and height. These values will be zero until the JP2 source has been opened.

References JP2_Decoder::Image_Size.

Referenced by JP2_Decoder::open().

unsigned int image_width (  ) const [inline]

Get the width of the JP2 source image.

Returns:
The width of the image in pixels. This will be zero until the JP2 source has been opened.

References JP2_Decoder::Image_Size, and Size_2D::Width.

Referenced by main().

unsigned int image_height (  ) const [inline]

Get the height of the JP2 source image.

Returns:
The height of the image in lines. This will be zero until the JP2 source has been opened.

References Size_2D::Height, and JP2_Decoder::Image_Size.

Referenced by main().

unsigned int image_bands (  ) const [inline]

Get the number of bands (components) in the JP2 image.

Returns:
The number of bands in the JP2 image. This will be zero until the JP2 source has been opened.

References JP2_Decoder::Image_Bands.

Referenced by main().

unsigned int resolution_levels (  ) const [inline]

Get the total number of codestream resolution levels.

N.B.: The number of resolution levels is one more than the number of JPEG2000 decomposition levels.

The number of resolution levels is determined from the default codestream (COD segment) values. Tile segments may override this value.

Returns:
The total number of codestream resolution levels. This will be zero until the JP2 source has been opened.

References JP2_Decoder::Resolution_Levels.

Referenced by main().

unsigned int pixel_bytes (  ) const [inline]

Get the number of bytes per pixel.

Returns:
The number of storage bytes used by each pixel. This will be zero until the JP2 source has been opened.

References JP2_Decoder::Pixel_Bytes.

Referenced by main().

unsigned int pixel_bits (  ) const [inline]

Get the pixel precision.

Returns:
The number of valid bits used by each pixel. This will be zero until the JP2 source has been opened.

References JP2_Decoder::Pixel_Bits.

Referenced by main(), and JP2_Decoder::open().

bool signed_data (  ) const [inline]

Get the signedness of the pixel data.

Returns:
true if the pixel data is treated as signed; false otherwise. This information will be meaningless until the JP2 source has been opened.

References JP2_Decoder::Signed_Data.

Referenced by main(), and JP2_Decoder::open().

unsigned char* const producer_UUID (  ) const [inline]

Get the UUID found in the JP2 source.

The first UUID value in a UUID List box of a UUID Info super box is copied. There may be additional UUID values, List boxes or Info boxes but these are ignored.

Returns:
A 16 byte (UUID_SIZE) array. N.B.: This is not null-terminated C-string character array. If no UUID has been found, or the JP2 source has not been opened, this will be NULL.

References JP2_Decoder::UUID_Info_UUID.

Referenced by main().

std::string URL (  ) const [inline]

Get the URL found in the JP2 source.

The first URL box contents of a UUID Info super box is copied. There may be additional URL boxes but they are ignored.

Returns:
A URL string. This will be empty if no URL has been found or the JP2 source has not been opened.

References JP2_Decoder::UUID_Info_URL.

Referenced by main().

std::string destination (  ) const [inline]

Get the destination file pathname for the rendered image data.

Returns:
The destination file pathname string. This will be empty if no destination has been bound to this JP2_Decoder.

References JP2_Decoder::Image_Destination.

Referenced by main().

JP2_Decoder& destination ( const std::string &  pathname ) [inline]

Set the destination file pathname for the rendered image data.

Parameters:
pathnameThe destination file pathname string.
Returns:
This JP2_Decoder.

References JP2_Decoder::Image_Destination.

Size_2D rendered_size (  ) const

Get the size of the rendered image.

Returns:
A Size_2D object containing the rendered image width and height. These values will be zero until the JP2 source has been opened.
See also:
rendered_width()
rendered_height()

References JP2_Decoder::Rendered_Size.

unsigned int rendered_width (  ) const

Get the width of the rendered image.

Returns:
The width of the rendered image in pixels. This will be zero until the JP2 source has been opened.
See also:
rendered_size()

References JP2_Decoder::Rendered_Size, and Size_2D::Width.

Referenced by main().

unsigned int rendered_height (  ) const

Get the height of the rendered image.

Returns:
The height of the rendered image in lines. This will be zero until the JP2 source has been opened.
See also:
rendered_size()

References Size_2D::Height, and JP2_Decoder::Rendered_Size.

Referenced by main().

Rectangle image_region (  ) const [inline]

Get the image region that will be rendered from the JP2 source.

Returns:
The Rectangle specifying the image region to be rendered. If no image region has been specified and the JP2 source has not yet been opened all the Rectangle values will be zero. When the JP2 source is opened, if no image region has been specified it will be initialized to the entire image size. If an image region has been specified it will be set to the intersection of the image size and the image region.
See also:
image_region(const Rectangle&)
image_size()

References JP2_Decoder::Image_Region.

Referenced by main().

JP2_Decoder & image_region ( const Rectangle region )

Set the image region that will be rendered from the JP2 source.

The image region is specified relative to the full resolution image. Specifying a rendering resolution level greater than 1 will result in a correspondingly smaller image region.

The actual image region rendered will be the intersection of the region with the image size.

Parameters:
regionA Rectangle specifying the image region to be rendered.
Returns:
This JP2_Decoder.
Exceptions:
out_of_rangeIf the decoder has been opened and selected region does not intersect with the image.
See also:
image_region(int, int, int, int)

References Size_2D::Height, Size_2D::Width, Point_2D::X, and Point_2D::Y.

JP2_Decoder & image_region ( int  x,
int  y,
int  width,
int  height 
)

Set the image region that will be rendered from the JP2 source.

Parameters:
xThe horizontal (x-axis) position of the image region.
yThe vertical (y-axis) position of the image region.
widthThe width of the image region.
heightThe height of the image region.
Returns:
This JP2_Decoder.
Exceptions:
out_of_rangeIf the decoder has been opened and selected region does not intersect with the image.
See also:
image_region(const Rectangle&)

References Point_2D::X.

unsigned int resolution_level (  ) const [inline]

Get the resolution level at which the codestream will be rendered.

Returns:
The codestream rendering resolution level.
See also:
resolution_level(unsigned int)

References JP2_Decoder::Resolution_Level.

Referenced by main().

JP2_Decoder & resolution_level ( unsigned int  level )

Set the resolution level at which the codestream will be rendered.

Level 1 is full resolution. Level 2 renders the image at half size, level 3 at quarter size, etc.; i.e. the image size is divided by 2**(level-1).

N.B.: The resolution level is one more than the JPEG2000 decomposition level.

Parameters:
levelThe codestream rendering resolution level.
Returns:
This JP2_Encoder.
Exceptions:
out_of_rangeIf the decoder has been opened since the image region was previously set and selected region does not intersect with the image.
bool swap_pixel_bytes (  ) const [inline]

Tests if multi-byte pixels will be reordered before being written.

Returns:
true if multi-byte pixels are to be reordered before writing; false otherwise.

References JP2_Decoder::Swap_Pixel_Bytes.

Referenced by main().

JP2_Decoder& swap_pixel_bytes ( bool  swap_data ) [inline]

Sets whether multi-byte pixels will be reordered before being written.

By default multi-byte pixels will not be reordered. N.B.: The pixel data rendered from the JP2 file has no defined order. It is necessary to obtain correct pixel data ordering information elsewhere.

Parameters:
swap_datatrue if multi-byte pixels are to be reordered before writing; false otherwise.
Returns:
This JP2_Decoder.

References JP2_Decoder::Swap_Pixel_Bytes.

unsigned long long bytes_written (  ) const [inline]

Get the number of image data bytes written.

Returns:
The number of image data bytes written.

References JP2_Decoder::Bytes_Written.

bool ready (  ) const

Tests if the decoder has the information it needs to do its job.

Both the JP2 source and rendered image destination must be specified.

Returns:
true if the decoder is ready; false otherwise.

References JP2_Decoder::Image_Destination, and JP2_Decoder::JP2_Pathname.

Referenced by JP2_Decoder::write_image_data().

string reasons (  ) const

Describe the reasons that the decoder is not ready.

Returns:
A string, possibly of more than one line, that decribes the reasons for the decoder not being ready. This will be the empty string if the decoder is ready.
See also:
ready()

References JP2_Decoder::Image_Destination, and JP2_Decoder::JP2_Pathname.

Referenced by JP2_Decoder::write_image_data().

unsigned long long decode (  )

Deocde the pixel data from the JPEG2000 JP2 source and write the rendered results to the image data destination.

The JP2 source is opened, the contents are rendered and written to the destination file, and then the source is closed.

Returns:
The number of bytes written to the image data file.

References JP2_Decoder::Bytes_Written, JP2_Decoder::close(), JP2_Decoder::open(), and JP2_Decoder::write_image_data().

Referenced by main().

void open (  )

Open the source JP2 file.

If the source is already open nothing is done.

Access to the JP2 source is opened and checked that it contains the required JP2 format content. The producer_UUID() and URL are extracted, if present. The image characterization - image_bands(), image_size(), pixel_bytes(), pixel_bits() and resolution_levels() - are determined. If the resolution level to be rendered is greater than the number of resolution levels, it is reduced to the maximum value. All the bands are compared to make suse they have the same image and pixel structure. The selected image_region(const Rectangle&), if any, is clipped to the image extent.

Exceptions:
logic_errorIf no JP2 source has been specified
out_of_rangeIf any of the image bands (JP2 components) do not have identical image structure (image and pixel).
out_of_rangeIf the selected image region does not intersect the image extent.

References box_name(), box_type(), Size_2D::Height, JP2_Decoder::ID, JP2_Decoder::Image_Bands, JP2_Decoder::Image_Region, JP2_Decoder::Image_Size, JP2_Decoder::image_size(), JP2_Decoder::is_open(), JP2_Decoder::JP2_Pathname, JP2_Decoder::pixel_bits(), JP2_Decoder::Pixel_Bits, JP2_Decoder::Pixel_Bytes, JP2_Decoder::Resolution_Level, JP2_Decoder::Resolution_Levels, JP2_Decoder::set_resolution_and_region(), JP2_Decoder::signed_data(), JP2_Decoder::Signed_Data, JP2_Decoder::URL_BOX_NAME, JP2_Decoder::UUID_BOX_NAME, JP2_Decoder::UUID_INFO_BOX_NAME, JP2_Decoder::UUID_Info_URL, JP2_Decoder::UUID_Info_UUID, UUID_SIZE, and Size_2D::Width.

Referenced by JP2_Decoder::decode(), main(), and JP2_Decoder::write_image_data().

bool is_open (  ) const

Test if the decoder is open.

Returns:
true if this JP2_Decoder has been successfully opened and not yet closed; false otherwise.

Referenced by JP2_Decoder::open(), and JP2_Decoder::write_image_data().

unsigned long long write_image_data (  )

Write rendered image data.

The JP2 source is opened if this has not yet been done, and the decoder is checked that it is ready. Data buffers to hold horizontal stripes of rendered image data are allocated.

The destination file is opened for writing. N.B.: If the file already exists the image data will be appended to the current content.

Returns:
The number of image data bytes that were written to the destination file.
Exceptions:
logic_errorIf the decoder is not ready().
runtime_errorIf insufficient memory is available to allocate the rendered image data buffers.

References JP2_Decoder::Bytes_Written, file_exists(), file_size(), JP2_Decoder::ID, JP2_Decoder::Image_Bands, JP2_Decoder::Image_Destination, JP2_Decoder::is_open(), JP2_Decoder::MAX_STRIPE_HEIGHT, JP2_Decoder::MIN_STRIPE_HEIGHT, JP2_Decoder::open(), JP2_Decoder::Pixel_Bits, JP2_Decoder::Pixel_Bytes, JP2_Decoder::ready(), JP2_Decoder::reasons(), JP2_Decoder::Rendered_Size, Size_2D::Width, and JP2_Decoder::write_stripe().

Referenced by JP2_Decoder::decode().

void close (  )

Close access to the JP2 source.

The JP2 source stream is closed and all resources associated with it are deleted. In addition, the JP2 source image characterization information - image_bands(), image_size(), pixel_bytes(), pixel_bits(), resolution_levels() producer_UUID() and URL() - is reset to the unknown state. However, neither the source() nor destination() pathname is reset so this JP2_Decoder is ready to be reused.

N.B.: Output specifications remain unchanged.

References Size_2D::Height, JP2_Decoder::Image_Bands, JP2_Decoder::Image_Region, JP2_Decoder::Image_Size, JP2_Decoder::Pixel_Bits, JP2_Decoder::Pixel_Bytes, JP2_Decoder::Rendered_Size, JP2_Decoder::Resolution_Level, JP2_Decoder::Resolution_Levels, JP2_Decoder::UUID_Info_URL, JP2_Decoder::UUID_Info_UUID, Size_2D::Width, Point_2D::X, and Point_2D::Y.

Referenced by JP2_Decoder::decode().

JP2_Decoder_Error * decoder_error (  ) const

Referenced by main().

std::streamsize write_stripe ( std::ostream &  destination,
std::streamoff  file_offset,
int  band,
int  line,
int  lines,
kdu_int16 *  buffer 
) [protected]

Write an image data buffer with pixel data to a stream.

The contents of the data buffer are expected to contain the results of codestream decoding of a horizontal stripe of the source image. This data is modified in place to adjust for data order and signedness.

The lines of image data starting with the specified line of the specified band are written to the buffer as a contiguous sequence of bytes.

Parameters:
destinationAn ostream that has been opened on the destination file.
file_offsetFile offset to the start of the image data.
bandThe index of the image band to which pixel data is to be written.
lineThe starting index of the image line to which pixel data it to be written.
linesThe number of image lines to write.
bufferBuffer storage containing lines * image_width pixels where each pixel is stored as a 16-bit signed integer.
Returns:
The number of image data bytes that were written to the destination file.

References ID.

Referenced by JP2_Decoder::write_image_data().

std::streamsize write_stripe ( std::ostream &  destination,
std::streamoff  file_offset,
int  band,
int  line,
int  lines,
kdu_int32 *  buffer 
) [protected]

Write an image data buffer with pixel data to a stream.

The contents of the data buffer are expected to contain the results of codestream decoding of a horizontal stripe of the source image. This data is modified in place to adjust for data order and signedness.

The lines of image data starting with the specified line of the specified band are written to the buffer as a contiguous sequence of bytes.

Parameters:
destinationAn ostream that has been opened on the destination file.
file_offsetFile offset to the start of the image data.
bandThe index of the image band to which pixel data is to be written.
lineThe starting index of the image line to which pixel data it to be written.
linesThe number of image lines to write.
bufferBuffer storage containing lines * image_width pixels where each pixel is stored as a 16-bit signed integer.
Returns:
The number of image data bytes that were written to the destination file.

References ID, and swap_bytes().

void set_resolution_and_region ( unsigned int  level,
const Rectangle region 
) [protected]

Set the effective rendering resolution level and image region.

The resolution level and image region interact to affect the rendered image size so they are set together.

If the decoder has not been opened nothing is done.

The efective resolution level is limited to the range 1-resolution levels and applied as an input restriction on the codestream rendering machinery. Any existing image area restriction is lifted at the same time.

If the image region is empty the entire image size is used as the effective image region. Otherwise the dimensions of the image region are adjusted by the resolution level (divided by 2**(level - 1)), intersected with the image size at the rendering resolution and the resulting effective image region is applied as an input restriction on the codestream rendering machinery.

The effective rendered image size is set.

Parameters:
levelThe rendering resolution level.
regionThe selected image area to be rendered relative to the full resolution image.
Exceptions:
out_of_rangeIf the selected image are does not intersect with the source image.

References Size_2D::area(), Size_2D::Height, ID, Size_2D::Width, Point_2D::X, and Point_2D::Y.

Referenced by JP2_Decoder::open().


Member Data Documentation

const char *const ID = "UA::HiRISE::JP2_Decoder (1.20 2013/03/18 03:20:41)" [static]

Class identification name with source code version and date.

Referenced by JP2_Decoder::open(), and JP2_Decoder::write_image_data().

const char *const UUID_INFO_BOX_NAME = "uinf" [static]

PDS label reference information UUID Info JP2 container box name.

Referenced by JP2_Decoder::open().

const char *const UUID_BOX_NAME = "ulst" [static]

Data provider UUID JP2 box name.

Referenced by JP2_Decoder::open().

const char *const URL_BOX_NAME = "url " [static]

PDS label relative filename URL JP2 box name.

Referenced by JP2_Decoder::open().

const int MIN_STRIPE_HEIGHT = 256 [static]

Image data stripe minimum and maximum number of lines.

Referenced by JP2_Decoder::write_image_data().

const int MAX_STRIPE_HEIGHT = 8192
const int DECODER_EXCEPTION = 67 [static]

JP2_Decoder_Error exception signal value.

std::string JP2_Pathname [protected]
unsigned int Image_Bands [protected]
Size_2D Image_Size [protected]
unsigned int Pixel_Bytes [protected]
unsigned int Pixel_Bits [protected]
bool Signed_Data [protected]

Whether pixel data is signed.

Referenced by JP2_Decoder::open(), and JP2_Decoder::signed_data().

unsigned int Resolution_Levels [protected]

Resolution levels available.

This is the minimum number of available resolution levels as determined from the default coding style (COD) information. The minimum resolution level available in the tile segments may be lower still, but that won't be known until the tiles have been read.

N.B.: The number of resolution levels is one more than the number of JPEG2000 decomposition levels.

Referenced by JP2_Decoder::close(), JP2_Decoder::open(), and JP2_Decoder::resolution_levels().

unsigned char* UUID_Info_UUID [protected]

First UUID value found in a UUID List box of a UUID Info super box.

This will be NULL if no UUID has been found. It will be a 16 byte (UUID_SIZE) array otherwise.

Referenced by JP2_Decoder::close(), JP2_Decoder::open(), and JP2_Decoder::producer_UUID().

std::string UUID_Info_URL [protected]

First URL value found in a URL box of a UUID Info super box.

Referenced by JP2_Decoder::close(), JP2_Decoder::open(), and JP2_Decoder::URL().

std::string Image_Destination [protected]
Size_2D Rendered_Size [protected]
Rectangle Image_Region [protected]

Image region to be rendered.

Referenced by JP2_Decoder::close(), JP2_Decoder::image_region(), and JP2_Decoder::open().

unsigned int Resolution_Level [protected]

Resolution level to render.

N.B.: The resolution level is one more than the JPEG2000 decomposition level.

Referenced by JP2_Decoder::close(), JP2_Decoder::open(), and JP2_Decoder::resolution_level().

bool Swap_Pixel_Bytes [protected]

Whether pixel bytes should be reordered when written.

Referenced by JP2_Decoder::swap_pixel_bytes().

unsigned long long Bytes_Written [protected]

Total number of pixel bytes written.

Referenced by JP2_Decoder::bytes_written(), JP2_Decoder::decode(), and JP2_Decoder::write_image_data().


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