JasPer: jas_image.h File Reference

JasPer 4.2.1 |

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Classes | Macros | Typedefs | Functions
jas_image.h File Reference

JasPer Image Class. More...

`#include <jasper/jas_config.h>`
`#include <jasper/jas_stream.h>`
`#include <jasper/jas_types.h>`
`#include <jasper/jas_seq.h>`
`#include <jasper/jas_cm.h>`
`#include <stdio.h>`

Go to the source code of this file.

## Classes
struct | jas_image_cmpt_t
| Image component class. More...
struct | jas_image_t
| Image class. More...
struct | jas_image_cmptparm_t
| Component parameters class. More...
struct | jas_image_fmtops_t
| Image format-dependent operations. More...
struct | jas_image_fmtinfo_t
| Image format information. More...

## Macros
#define | JAS_IMAGE_MAXFMTS 32
| The maximum number of image data formats supported.
#define | jas_image_width(image) ((image)->brx_ - (image)->tlx_)
| Get the width of the image in units of the image reference grid.
#define | jas_image_height(image) ((image)->bry_ - (image)->tly_)
| Get the height of the image in units of the image reference grid.
#define | jas_image_tlx(image) ((image)->tlx_)
| Get the x-coordinate of the top-left corner of the image bounding box on the reference grid.
#define | jas_image_tly(image) ((image)->tly_)
| Get the y-coordinate of the top-left corner of the image bounding box on the reference grid.
#define | jas_image_brx(image) ((image)->brx_)
| Get the x-coordinate of the bottom-right corner of the image bounding box on the reference grid (plus one).
#define | jas_image_bry(image) ((image)->bry_)
| Get the y-coordinate of the bottom-right corner of the image bounding box on the reference grid (plus one).
#define | jas_image_numcmpts(image) ((image)->numcmpts_)
| Get the number of image components.
#define | jas_image_clrspc(image) ((image)->clrspc_)
| Get the color model used by the image.
#define | jas_image_setclrspc(image, clrspc) ((image)->clrspc_ = (clrspc))
| Set the color model for an image.
#define | jas_image_cmptwidth(image, cmptno) ((image)->cmpts_[cmptno]->width_)
| Get the width of a component.
#define | jas_image_cmptheight(image, cmptno) ((image)->cmpts_[cmptno]->height_)
| Get the height of a component.
#define | jas_image_cmptsgnd(image, cmptno) ((image)->cmpts_[cmptno]->sgnd_)
| Get the signedness of the sample data for a component.
#define | jas_image_cmptprec(image, cmptno) ((image)->cmpts_[cmptno]->prec_)
| Get the precision of the sample data for a component.
#define | jas_image_cmpthstep(image, cmptno) ((image)->cmpts_[cmptno]->hstep_)
| Get the horizontal subsampling factor for a component.
#define | jas_image_cmptvstep(image, cmptno) ((image)->cmpts_[cmptno]->vstep_)
| Get the vertical subsampling factor for a component.
#define | jas_image_cmpttlx(image, cmptno) ((image)->cmpts_[cmptno]->tlx_)
| Get the x-coordinate of the top-left corner of a component.
#define | jas_image_cmpttly(image, cmptno) ((image)->cmpts_[cmptno]->tly_)
| Get the y-coordinate of the top-left corner of a component.
#define | jas_image_cmptbrx(image, cmptno)
| Get the x-coordinate of the bottom-right corner of a component (plus "one").
#define | jas_image_cmptbry(image, cmptno)
| Get the y-coordinate of the bottom-right corner of a component (plus "one").
#define | jas_image_cmprof(image) ((image)->cmprof_)
| Get the color management profile of an image.
#define | jas_image_setcmprof(image, cmprof) ((image)->cmprof_ = cmprof)
| Set the color management profile for an image.

## Typedefs
typedef int_fast32_t | jas_image_coord_t
| Image coordinate.
typedef int_fast16_t | jas_image_colorspc_t
| Color space (e.g., RGB, YCbCr).
typedef int_fast32_t | jas_image_cmpttype_t
| Component type (e.g., color, opacity).
typedef int_fast16_t | jas_image_smpltype_t
| Component sample data format (e.g., real/integer, signedness, precision).

## Functions
JAS_EXPORT jas_image_t * | jas_image_create (unsigned numcmpts, const jas_image_cmptparm_t *cmptparms, jas_clrspc_t clrspc)
| Create an image.
JAS_EXPORT jas_image_t * | jas_image_create0 (void)
| Create an "empty" image.
JAS_EXPORT jas_image_t * | jas_image_copy (jas_image_t *image)
| Clone an image.
JAS_EXPORT void | jas_image_destroy (jas_image_t *image)
| Deallocate any resources associated with an image.
JAS_ATTRIBUTE_PURE JAS_EXPORT bool | jas_image_cmpt_domains_same (const jas_image_t *image)
| Test if all components are specified at the same positions in space.
JAS_ATTRIBUTE_PURE JAS_EXPORT uint_fast32_t | jas_image_rawsize (const jas_image_t *image)
| Get the raw size of an image (i.e., the nominal size of the image without any compression.
JAS_EXPORT jas_image_t * | jas_image_decode (jas_stream_t *in, int fmt, const char *optstr)
| Create an image from a stream in some specified format.
JAS_EXPORT int | jas_image_encode (jas_image_t *image, jas_stream_t *out, int fmt, const char *optstr)
| Write an image to a stream in a specified format.
JAS_EXPORT int | jas_image_readcmpt (jas_image_t *image, unsigned cmptno, jas_image_coord_t x, jas_image_coord_t y, jas_image_coord_t width, jas_image_coord_t height, jas_matrix_t *data)
| Read a rectangular region of an image component.
JAS_EXPORT int | jas_image_writecmpt (jas_image_t *image, unsigned cmptno, jas_image_coord_t x, jas_image_coord_t y, jas_image_coord_t width, jas_image_coord_t height, const jas_matrix_t *data)
| Write a rectangular region of an image component.
JAS_EXPORT void | jas_image_delcmpt (jas_image_t *image, unsigned cmptno)
| Delete a component from an image.
JAS_EXPORT int | jas_image_addcmpt (jas_image_t *image, int cmptno, const jas_image_cmptparm_t *cmptparm)
| Add a component to an image.
JAS_EXPORT int | jas_image_copycmpt (jas_image_t *dstimage, unsigned dstcmptno, jas_image_t *srcimage, unsigned srccmptno)
| Copy a component from one image to another.
JAS_EXPORT int | jas_image_depalettize (jas_image_t *image, unsigned cmptno, unsigned numlutents, const int_fast32_t *lutents, unsigned dtype, unsigned newcmptno)
| Depalettize an image.
JAS_EXPORT int | jas_image_readcmptsample (jas_image_t *image, unsigned cmptno, unsigned x, unsigned y)
| Read a component sample for an image.
JAS_EXPORT void | jas_image_writecmptsample (jas_image_t *image, unsigned cmptno, unsigned x, unsigned y, int_fast32_t v)
| Write a component sample for an image.
JAS_ATTRIBUTE_PURE JAS_EXPORT int | jas_image_getcmptbytype (const jas_image_t *image, jas_image_cmpttype_t ctype)
| Get an image component by its type.
JAS_EXPORT void | jas_image_clearfmts (void)
| Clear the table of image formats.
JAS_EXPORT const jas_image_fmtinfo_t * | jas_image_getfmtbyind (int index)
| Get a image format entry by its table index.
JAS_EXPORT int | jas_image_getnumfmts (void)
| Get the number of image format table entries.
JAS_EXPORT int | jas_image_setfmtenable (int index, int enabled)
| Get the number of image format table entries.
JAS_EXPORT int | jas_image_addfmt (int id, const char *name, const char *ext, const char *desc, const jas_image_fmtops_t *ops)
| Add entry to table of image formats.
JAS_ATTRIBUTE_PURE JAS_EXPORT int | jas_image_strtofmt (const char *s)
| Get the ID for the image format with the specified name.
JAS_ATTRIBUTE_CONST JAS_EXPORT const char * | jas_image_fmttostr (int fmt)
| Get the name of the image format with the specified ID.
JAS_ATTRIBUTE_CONST JAS_EXPORT const jas_image_fmtinfo_t * | jas_image_lookupfmtbyid (int id)
| Lookup image format information by the format ID.
JAS_ATTRIBUTE_PURE JAS_EXPORT const jas_image_fmtinfo_t * | jas_image_lookupfmtbyname (const char *name)
| Lookup image format information by the format name.
JAS_ATTRIBUTE_PURE JAS_EXPORT int | jas_image_fmtfromname (const char *filename)
| Guess the format of an image file based on its name.
JAS_ATTRIBUTE_PURE JAS_EXPORT int | jas_image_getfmt (jas_stream_t *in)
| Get the format of image data in a stream.
JAS_ATTRIBUTE_PURE JAS_EXPORT int | jas_image_ishomosamp (const jas_image_t *image)
| Test if the sampling of the image is homogeneous.
JAS_EXPORT int | jas_image_sampcmpt (jas_image_t *image, unsigned cmptno, unsigned newcmptno, jas_image_coord_t ho, jas_image_coord_t vo, jas_image_coord_t hs, jas_image_coord_t vs, int sgnd, unsigned prec)
| ???
JAS_EXPORT int | jas_image_writecmpt2 (jas_image_t *image, unsigned cmptno, jas_image_coord_t x, jas_image_coord_t y, jas_image_coord_t width, jas_image_coord_t height, const long *buf)
| Write sample data in a component of an image.
JAS_EXPORT int | jas_image_readcmpt2 (jas_image_t *image, unsigned cmptno, jas_image_coord_t x, jas_image_coord_t y, jas_image_coord_t width, jas_image_coord_t height, long *buf)
| Read sample data in a component of an image.
JAS_EXPORT jas_image_t * | jas_image_chclrspc (jas_image_t *image, const jas_cmprof_t *outprof, jas_cmxform_intent_t intent)
| Change the color space for an image.
JAS_EXPORT int | jas_image_dump (jas_image_t *image, FILE *out)
| Dump the information for an image (for debugging).

## Detailed Description

JasPer Image Class.