MrSID Decode SDK for Raster Reference Manual
9.5.1.4427
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add resolutions to the image More...
#include <lti_multiresFilter.h>
Public Member Functions | |
LT_STATUS | initialize (LTIImageStage *srcImage) |
initializer More... | |
LT_STATUS | initialize (LTIImageStage *srcImage, lt_int8 scaleFactor) |
initializer (for compatibly with the old LTIStaticZoomFilter) More... | |
LT_STATUS | initialize (LTIImageStage *srcImage, double deltaMag, double minMag, double maxMag) |
LT_STATUS | getDimsAtMag (double mag, lt_uint32 &width, lt_uint32 &height) const |
get image width and height at given magnification More... | |
lt_int64 | getEncodingCost (const LTIScene &scene) const |
get the cost to encode this scene More... | |
bool | getReaderScene (const LTIScene &decodeScene, LTIScene &readerScene) const |
get the underlying scene to be used More... | |
virtual lt_uint32 | getModifications (const LTIScene &scene) const |
get the modification bitfield for this image More... | |
bool | getPipelineInfo (LTIPipelineInfo info) const |
LT_STATUS | setResampleMethod (LTIResampleMethod resampleMethod) |
Set resampling method. More... | |
void | setMagSnapThreshold (double threshold) |
void | setDeltaMagXY (double deltaMagX, double deltaMagY) |
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lt_uint32 | getWidth () const |
get image width More... | |
lt_uint32 | getHeight () const |
get image height More... | |
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const LTIGeoCoord & | getGeoCoord () const |
get the geographic coordinates of the image More... | |
bool | isGeoCoordImplicit () const |
is geo information "real" or not More... | |
LT_STATUS | overrideGeoCoord (const LTIGeoCoord &geoCoord) |
override the geographic coordinates of the image More... | |
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double | getMinMagnification () const |
get the minimum magnification More... | |
double | getMaxMagnification () const |
get the maximum magnification More... | |
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lt_uint32 | getStripHeight () const |
get strip height More... | |
LT_STATUS | setStripHeight (lt_uint32 stripHeight) |
set the strip height More... | |
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const LTIPixel & | getPixelProps () const |
get the pixel properties of the image More... | |
const LTIPixel * | getBackgroundPixel () const |
get the values of the background pixel More... | |
const LTIPixel * | getNoDataPixel () const |
get the values of the "no data" (transparency) pixel More... | |
const LTIPixelLookupTable * | getPixelLookupTable () const |
get the color lookup table, if any More... | |
const LTIPixel & | getMinDynamicRange () const |
get the minimum dynamic range value of image More... | |
const LTIPixel & | getMaxDynamicRange () const |
get the maximum dynamic range value of image More... | |
const LTIMetadataDatabase & | getMetadata () const |
get the metadata associated with the image More... | |
bool | isSelective () const |
check if image supports "random access" decoding More... | |
void | setProgressDelegate (LTIProgressDelegate *delegate) |
set progress delegate More... | |
LTIProgressDelegate * | getProgressDelegate () const |
get progress delegate More... | |
void | setInterruptDelegate (LTIInterruptDelegate *delegate) |
set interrupt delegate More... | |
LTIInterruptDelegate * | getInterruptDelegate () const |
get interrupt delegate More... | |
LT_STATUS | overrideBackgroundPixel (const LTIPixel *backgroundPixel) |
override the background color of the image More... | |
LT_STATUS | overrideNoDataPixel (const LTIPixel *nodataPixel) |
override the "no data" (transparency) color of the image More... | |
LT_STATUS | overrideDynamicRange (const LTIPixel &drmin, const LTIPixel &drmax) |
override the dynamic range of the image More... | |
LT_STATUS | overridePixelBPS (lt_uint8) |
override the bits-per-sample of the image's (sample's) datatype More... | |
LT_STATUS | overridePixelLookupTable (const LTIPixelLookupTable *pixelLookupTable) |
override the CLUT of the image More... | |
LT_STATUS | overrideMetadata (const LTIMetadataDatabase &metadata) |
override the metadata of the image More... | |
LTIMaskSource * | getMask () const |
LTIImageStage * | getPreviousStage (void) const |
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LT_STATUS | read (const LTIScene &scene, LTISceneBuffer &buffer) |
read (decode) a scene from the image More... | |
virtual LT_STATUS | readBegin (const LTIPixel &pixelProps, const LTIScene &fullScene) |
start strip-based read More... | |
virtual LT_STATUS | readStrip (LTISceneBuffer &buffer, const LTIScene &stripScene) |
read a strip from the image More... | |
virtual LT_STATUS | readEnd () |
finish strip-based read More... | |
lt_uint32 | getNumStrips () const |
get number of strips in scene More... | |
LTIScene | getStripScene (lt_uint32 stripNumber) const |
get a strip for current scene More... | |
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lt_uint16 | getNumBands () const |
get number of bands More... | |
LTIColorSpace | getColorSpace () const |
get colorspace More... | |
LTIDataType | getDataType () const |
get data type More... | |
bool | isNaturalDynamicRange () const |
check if the range is "complete" or not More... | |
lt_int64 | getNominalImageSizeWithoutAlpha () const |
get the nominal size of the image, not considering the alpha band More... | |
lt_int64 | getNominalImageSizeWithAlpha () const |
get the nominal size of the image, including the alpha band More... | |
void | getGeoPoint (LTIPosition position, double &x, double &y) const |
get position of a named point More... | |
LTIPixel * | createBackgroundPixel () const |
return new background pixel More... | |
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virtual void | retain (void) const |
increment reference counter More... | |
virtual void | release (void) const |
decrement the reference counter and delete the object when the counter is zero More... | |
Static Public Member Functions | |
static LTIMultiResFilter * | create (void) |
static double | magForIcon (const LTIImage &image, lt_uint32 iconSize) |
static double | magForIcon (lt_uint32 width, lt_uint32 height, lt_uint32 iconSize) |
static LT_STATUS | push (LTIImageStage *&pipeline, const LTIScene &dstScene) |
static LT_STATUS | push (LTIImageStage *&pipeline, double mag) |
Protected Types | |
enum | Mode { MODE_INVALID, MODE_RESAMPLE, MODE_PASSTHROUGH, MODE_DOWNSAMPLE_FULLREAD, MODE_ALL_AT_ONCE } |
enum | { kMaxMagnification = 512 } |
Protected Member Functions | |
LTIMultiResFilter (void) | |
virtual | ~LTIMultiResFilter (void) |
LT_STATUS | decodeBegin (const LTIPixel &pixelProps, const LTIScene &fullScene) |
start strip-based read More... | |
LT_STATUS | decodeStrip (LTISceneBuffer &stripBuffer, const LTIScene &stripScene) |
read a strip from the image More... | |
LT_STATUS | decodeEnd (void) |
finish strip-based read More... | |
bool | getChildScene (const LTIScene &scene, Mode &mode, double &xScale, double &yScale, LTIScene &childScene) const |
Additional Inherited Members | |
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lt_uint32 | m_stripHeight |
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double | m_minMag |
double | m_maxMag |
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LTIGeoCoord * | m_geoCoord |
bool | m_geoCoordImplicit |
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lt_uint32 | m_width |
lt_uint32 | m_height |
Extends the magnification range of an image, to allow decodes at different resolutions than the image stage would normally allow.
Note that this class is not the same as at the LTIStaticZoomFilter class, which scales the magnification statically for the pipeline when initially constructed. This class allows for the zoom level to be extended for an individual decode operation.
Definition at line 39 of file lti_multiresFilter.h.
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Enumerator | |
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kMaxMagnification |
Definition at line 142 of file lti_multiresFilter.h.
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Enumerator | |
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MODE_INVALID | |
MODE_RESAMPLE | |
MODE_PASSTHROUGH | |
MODE_DOWNSAMPLE_FULLREAD | |
MODE_ALL_AT_ONCE |
Definition at line 127 of file lti_multiresFilter.h.
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protectedvirtual |
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protectedvirtual |
This function is called by readBegin() to start the actual class-specific work for decoding a scene.
Derived classes must implement this function.
This function should never be called directly.
pixelProps | the band selection |
fullScene | the full scene to be read |
Reimplemented from LTIImageFilter.
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protectedvirtual |
This function is called by readEnd() to complete the actual class-specific work for decoding a scene.
Derived classes must implement this function.
This function should never be called directly.
Reimplemented from LTIImageFilter.
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protectedvirtual |
This function is called by readStrip() to implement the actual class-specific work for decoding a strip of the scene.
Derived classes must implement this function.
This function should never be called directly.
stripBuffer | the buffer to read the pixels into |
stripScene | the scene for this strip being decoded |
Reimplemented from LTIImageFilter.
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This function returns the width and height of the image, in pixels, relative to the given magnification.
mag | magnification to determine width at |
width | the image width at the magnification |
height | the image height at the magnification |
Reimplemented from LTIImageFilter.
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Returns the "cost" to encode this scene, for use by those image writers which have usage metering enabled. The typical cost is equal to the nominal image size (width * height * numBands * bytesPerSample), but this is overridden for special situations, e.g. the mosaic filter.
scene | the scene to be charged for |
Reimplemented from LTIImageFilter.
This function returns a bitfield describing what kinds of modifications have been made to the image during and since its initial encoding.
scene | the area pertaining to this request |
Reimplemented from LTIImageFilter.
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Reimplemented from LTIImageFilter.
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Get the scene that will be sent to the underlying LTIImageReader. This is useful in some complex pipelines.
decodeScene | the scene that would be given to read() |
readerScene | the scene that is the actual scene passed the underlying image reader |
Reimplemented from LTIImageFilter.
LT_STATUS LTIMultiResFilter::initialize | ( | LTIImageStage * | srcImage) |
Creates an image stage which can be decoded at arbitrary magnifications.
Normally image stages will only support a limited set of magnification values for the LTIScene passed to LTIImageStage::read() – often, only 1.0. This class will perform any needed resampling on the fly so that arbitrary (power-of-two) magnifications are supported.
srcImage | the base image |
LT_STATUS LTIMultiResFilter::initialize | ( | LTIImageStage * | srcImage, |
lt_int8 | scaleFactor | ||
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Magnifies the image by the scale factor given. The image width, height, geographic resolution, etc, are all updated accordingly.
A positive scale factor performs a "res-up" operation, while a negative scale factor will reduce the image. That is, a scale factor of 2 will double the image size, e.g. from a magnification of 1.0 to 2.0, while a scale factor of -2 will halve the image size, e.g. from a magnification of 1.0 to 0.5.
srcImage | the base image |
scaleFactor | the integer scale factor |
LT_STATUS LTIMultiResFilter::initialize | ( | LTIImageStage * | srcImage, |
double | deltaMag, | ||
double | minMag, | ||
double | maxMag | ||
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void LTIMultiResFilter::setDeltaMagXY | ( | double | deltaMagX, |
double | deltaMagY | ||
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void LTIMultiResFilter::setMagSnapThreshold | ( | double | threshold) |
LT_STATUS LTIMultiResFilter::setResampleMethod | ( | LTIResampleMethod | resampleMethod) |
resampleMethod | resampling method See LTIResampleMethod |
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