ref: f7e5af47f117be34669dc1e532d525dcbbff73f0
dir: /jas_image.c/
/*
* Copyright (c) 1999-2000 Image Power, Inc. and the University of
* British Columbia.
* Copyright (c) 2001-2003 Michael David Adams.
* All rights reserved.
*/
/* __START_OF_JASPER_LICENSE__
*
* JasPer License Version 2.0
*
* Copyright (c) 2001-2006 Michael David Adams
* Copyright (c) 1999-2000 Image Power, Inc.
* Copyright (c) 1999-2000 The University of British Columbia
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person (the
* "User") obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* 1. The above copyright notices and this permission notice (which
* includes the disclaimer below) shall be included in all copies or
* substantial portions of the Software.
*
* 2. The name of a copyright holder shall not be used to endorse or
* promote products derived from the Software without specific prior
* written permission.
*
* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
*
* __END_OF_JASPER_LICENSE__
*/
/*
* Image Library
*
* $Id$
*/
/******************************************************************************\
* Includes.
\******************************************************************************/
#define JAS_FOR_INTERNAL_USE_ONLY
#include "jasper/jas_init.h"
#include "jasper/jas_image.h"
#include "jasper/jas_math.h"
#include "jasper/jas_malloc.h"
#include "jasper/jas_string.h"
#include "jasper/jas_debug.h"
/******************************************************************************\
* Types.
\******************************************************************************/
#define FLOORDIV(x, y) ((x) / (y))
/******************************************************************************\
* Local prototypes.
\******************************************************************************/
static jas_image_cmpt_t *jas_image_cmpt_create0(void);
static void jas_image_cmpt_destroy(jas_image_cmpt_t *cmpt);
static jas_image_cmpt_t *jas_image_cmpt_create(int_fast32_t tlx,
int_fast32_t tly, int_fast32_t hstep, int_fast32_t vstep,
int_fast32_t width, int_fast32_t height, uint_fast16_t depth, bool sgnd,
bool inmem);
static void jas_image_setbbox(jas_image_t *image);
static jas_image_cmpt_t *jas_image_cmpt_copy(jas_image_cmpt_t *cmpt);
static int jas_image_growcmpts(jas_image_t *image, unsigned maxcmpts);
static uint_fast32_t inttobits(jas_seqent_t v, unsigned prec, bool sgnd);
static jas_seqent_t bitstoint(uint_fast32_t v, unsigned prec, bool sgnd);
static int putint(jas_stream_t *out, bool sgnd, unsigned prec, long val);
static int getint(jas_stream_t *in, bool sgnd, unsigned prec, long *val);
static long uptomult(long x, long y);
static long downtomult(long x, long y);
static long convert(long val, bool oldsgnd, unsigned oldprec, bool newsgnd,
unsigned newprec);
static void jas_image_calcbbox2(const jas_image_t *image,
jas_image_coord_t *tlx, jas_image_coord_t *tly, jas_image_coord_t *brx,
jas_image_coord_t *bry);
static void jas_image_fmtinfo_init(jas_image_fmtinfo_t *fmtinfo);
static void jas_image_fmtinfo_cleanup(jas_image_fmtinfo_t *fmtinfo);
/******************************************************************************\
* Create and destroy operations.
\******************************************************************************/
jas_image_t *jas_image_create(unsigned numcmpts,
const jas_image_cmptparm_t *cmptparms, jas_clrspc_t clrspc)
{
jas_image_t *image;
size_t rawsize;
unsigned cmptno;
const jas_image_cmptparm_t *cmptparm;
JAS_LOGDEBUGF(100, "jas_image_create(%d, %p, %d)\n", numcmpts, cmptparms,
clrspc);
if (!(image = jas_image_create0())) {
goto error;
}
image->clrspc_ = clrspc;
image->maxcmpts_ = numcmpts;
// image->inmem_ = true;
/* Allocate memory for the per-component information. */
if (!(image->cmpts_ = jas_alloc2(image->maxcmpts_,
sizeof(jas_image_cmpt_t *)))) {
goto error;
}
/* Initialize in case of failure. */
for (cmptno = 0; cmptno < image->maxcmpts_; ++cmptno) {
image->cmpts_[cmptno] = 0;
}
#if 0
/* Compute the approximate raw size of the image. */
rawsize = 0;
for (cmptno = 0, cmptparm = cmptparms; cmptno < numcmpts; ++cmptno,
++cmptparm) {
rawsize += cmptparm->width * cmptparm->height *
(cmptparm->prec + 7) / 8;
}
/* Decide whether to buffer the image data in memory, based on the
raw size of the image. */
inmem = (rawsize < JAS_IMAGE_INMEMTHRESH);
#endif
/* Create the individual image components. */
for (cmptno = 0, cmptparm = cmptparms; cmptno < numcmpts; ++cmptno,
++cmptparm) {
if (!jas_safe_size_mul3(cmptparm->width, cmptparm->height,
(cmptparm->prec + 7), &rawsize)) {
goto error;
}
rawsize /= 8;
const bool inmem = (rawsize < JAS_IMAGE_INMEMTHRESH);
if (!(image->cmpts_[cmptno] = jas_image_cmpt_create(cmptparm->tlx,
cmptparm->tly, cmptparm->hstep, cmptparm->vstep,
cmptparm->width, cmptparm->height, cmptparm->prec,
cmptparm->sgnd, inmem))) {
goto error;
}
++image->numcmpts_;
}
/* Determine the bounding box for all of the components on the
reference grid (i.e., the image area) */
jas_image_setbbox(image);
return image;
error:
if (image) {
jas_image_destroy(image);
}
return 0;
}
jas_image_t *jas_image_create0()
{
jas_image_t *image;
if (!(image = jas_malloc(sizeof(jas_image_t)))) {
return 0;
}
image->tlx_ = 0;
image->tly_ = 0;
image->brx_ = 0;
image->bry_ = 0;
image->clrspc_ = JAS_CLRSPC_UNKNOWN;
image->numcmpts_ = 0;
image->maxcmpts_ = 0;
image->cmpts_ = 0;
// image->inmem_ = true;
image->cmprof_ = 0;
return image;
}
jas_image_t *jas_image_copy(jas_image_t *image)
{
jas_image_t *newimage;
if (!(newimage = jas_image_create0())) {
goto error;
}
if (jas_image_growcmpts(newimage, image->numcmpts_)) {
goto error;
}
for (unsigned cmptno = 0; cmptno < image->numcmpts_; ++cmptno) {
if (!(newimage->cmpts_[cmptno] = jas_image_cmpt_copy(
image->cmpts_[cmptno]))) {
goto error;
}
++newimage->numcmpts_;
}
jas_image_setbbox(newimage);
if (image->cmprof_) {
if (!(newimage->cmprof_ = jas_cmprof_copy(image->cmprof_))) {
goto error;
}
}
return newimage;
error:
if (newimage) {
jas_image_destroy(newimage);
}
return 0;
}
static jas_image_cmpt_t *jas_image_cmpt_create0()
{
jas_image_cmpt_t *cmpt;
if (!(cmpt = jas_malloc(sizeof(jas_image_cmpt_t)))) {
return 0;
}
memset(cmpt, 0, sizeof(jas_image_cmpt_t));
cmpt->type_ = JAS_IMAGE_CT_UNKNOWN;
return cmpt;
}
static jas_image_cmpt_t *jas_image_cmpt_copy(jas_image_cmpt_t *cmpt)
{
jas_image_cmpt_t *newcmpt;
if (!(newcmpt = jas_image_cmpt_create0())) {
return 0;
}
newcmpt->tlx_ = cmpt->tlx_;
newcmpt->tly_ = cmpt->tly_;
newcmpt->hstep_ = cmpt->hstep_;
newcmpt->vstep_ = cmpt->vstep_;
newcmpt->width_ = cmpt->width_;
newcmpt->height_ = cmpt->height_;
newcmpt->prec_ = cmpt->prec_;
newcmpt->sgnd_ = cmpt->sgnd_;
newcmpt->cps_ = cmpt->cps_;
newcmpt->type_ = cmpt->type_;
if (!(newcmpt->stream_ = jas_stream_memopen(0, 0))) {
goto error;
}
if (jas_stream_seek(cmpt->stream_, 0, SEEK_SET)) {
goto error;
}
if (jas_stream_copy(newcmpt->stream_, cmpt->stream_, -1)) {
goto error;
}
if (jas_stream_seek(newcmpt->stream_, 0, SEEK_SET)) {
goto error;
}
return newcmpt;
error:
jas_image_cmpt_destroy(newcmpt);
return 0;
}
void jas_image_destroy(jas_image_t *image)
{
if (image->cmpts_) {
for (unsigned i = 0; i < image->numcmpts_; ++i) {
jas_image_cmpt_destroy(image->cmpts_[i]);
image->cmpts_[i] = 0;
}
jas_free(image->cmpts_);
}
if (image->cmprof_) {
jas_cmprof_destroy(image->cmprof_);
}
jas_free(image);
}
static jas_image_cmpt_t *jas_image_cmpt_create(int_fast32_t tlx,
int_fast32_t tly, int_fast32_t hstep, int_fast32_t vstep,
int_fast32_t width, int_fast32_t height, uint_fast16_t depth, bool sgnd,
bool inmem)
{
jas_image_cmpt_t *cmpt;
size_t size;
JAS_LOGDEBUGF(100,
"jas_image_cmpt_create(%ld, %ld, %ld, %ld, %ld, %ld, %d, %d, %d)\n",
JAS_CAST(long, tlx),
JAS_CAST(long, tly),
JAS_CAST(long, hstep),
JAS_CAST(long, vstep),
JAS_CAST(long, width),
JAS_CAST(long, height),
JAS_CAST(int, depth),
sgnd,
inmem
);
if (depth < 1U + sgnd) {
/* we need at least 1 bit for unsigned samples and 2
bits for signed samples */
return NULL;
}
if (width < 0 || height < 0 || hstep <= 0 || vstep <= 0) {
return NULL;
}
if (!jas_safe_intfast32_add(tlx, width, 0) ||
!jas_safe_intfast32_add(tly, height, 0)) {
return NULL;
}
if (!jas_safe_intfast32_mul3(width, height, depth, 0)) {
return NULL;
}
if (!(cmpt = jas_malloc(sizeof(jas_image_cmpt_t)))) {
return NULL;
}
cmpt->type_ = JAS_IMAGE_CT_UNKNOWN;
cmpt->tlx_ = tlx;
cmpt->tly_ = tly;
cmpt->hstep_ = hstep;
cmpt->vstep_ = vstep;
cmpt->width_ = width;
cmpt->height_ = height;
cmpt->prec_ = depth;
cmpt->sgnd_ = sgnd;
cmpt->stream_ = 0;
cmpt->cps_ = (depth + 7) / 8;
/*
* Compute the number of samples in the image component, while protecting
* against overflow.
* size = cmpt->width_ * cmpt->height_ * cmpt->cps_;
*/
if (!jas_safe_size_mul3(cmpt->width_, cmpt->height_, cmpt->cps_, &size)) {
goto error;
}
cmpt->stream_ = (inmem) ? jas_stream_memopen(0, size) :
jas_stream_tmpfile();
if (!cmpt->stream_) {
goto error;
}
/* Zero the component data. This isn't necessary, but it is
convenient for debugging purposes. */
/* Note: conversion of size - 1 to long can overflow */
if (size > 0) {
if (size - 1 > LONG_MAX) {
goto error;
}
if (jas_stream_seek(cmpt->stream_, size - 1, SEEK_SET) < 0 ||
jas_stream_putc(cmpt->stream_, 0) == EOF ||
jas_stream_seek(cmpt->stream_, 0, SEEK_SET) < 0) {
goto error;
}
}
return cmpt;
error:
jas_image_cmpt_destroy(cmpt);
return 0;
}
static void jas_image_cmpt_destroy(jas_image_cmpt_t *cmpt)
{
if (cmpt->stream_) {
jas_stream_close(cmpt->stream_);
}
jas_free(cmpt);
}
/******************************************************************************\
* Load and save operations.
\******************************************************************************/
jas_image_t *jas_image_decode(jas_stream_t *in, int fmt, const char *optstr)
{
const jas_image_fmtinfo_t *fmtinfo;
jas_image_t *image;
image = 0;
/* If possible, try to determine the format of the input data. */
if (fmt < 0) {
if ((fmt = jas_image_getfmt(in)) < 0) {
jas_logerrorf("jas_image_decode: cannot determine image format\n");
goto error;
}
}
/* Is it possible to decode an image represented in this format? */
if (!(fmtinfo = jas_image_lookupfmtbyid(fmt))) {
goto error;
}
if (!fmtinfo->ops.decode) {
jas_logerrorf("jas_image_decode: no decode operation available\n");
goto error;
}
/* Decode the image. */
if (!(image = (*fmtinfo->ops.decode)(in, optstr))) {
jas_logerrorf("jas_image_decode: decode operation failed\n");
goto error;
}
/* Create a color profile if needed. */
if (!jas_clrspc_isunknown(image->clrspc_) &&
!jas_clrspc_isgeneric(image->clrspc_) && !image->cmprof_) {
if (!(image->cmprof_ =
jas_cmprof_createfromclrspc(jas_image_clrspc(image)))) {
jas_logerrorf("jas_image_decode: cannot create CM profile\n");
goto error;
}
}
return image;
error:
if (image) {
jas_image_destroy(image);
}
return 0;
}
int jas_image_encode(jas_image_t *image, jas_stream_t *out, int fmt,
const char *optstr)
{
const jas_image_fmtinfo_t *fmtinfo;
if (!(fmtinfo = jas_image_lookupfmtbyid(fmt))) {
jas_logerrorf("format lookup failed\n");
return -1;
}
return (fmtinfo->ops.encode) ? (*fmtinfo->ops.encode)(image, out,
optstr) : (-1);
}
/******************************************************************************\
* Component read and write operations.
\******************************************************************************/
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)
{
jas_image_cmpt_t *cmpt;
jas_image_coord_t i;
jas_image_coord_t j;
jas_seqent_t v;
int c;
jas_seqent_t *dr;
jas_seqent_t *d;
JAS_LOGDEBUGF(100, "jas_image_readcmpt(%p, %d, %ld, %ld, %ld, %ld, %p)\n",
image, cmptno, JAS_CAST(long, x), JAS_CAST(long, y),
JAS_CAST(long, width), JAS_CAST(long, height), data);
if(data == NULL) {
return -1;
}
if (cmptno >= image->numcmpts_) {
return -1;
}
cmpt = image->cmpts_[cmptno];
if (x >= cmpt->width_ || y >= cmpt->height_ ||
x + width > cmpt->width_ ||
y + height > cmpt->height_) {
return -1;
}
if (!jas_matrix_numrows(data) || !jas_matrix_numcols(data)) {
return -1;
}
if (jas_matrix_numrows(data) != height || jas_matrix_numcols(data) !=
width) {
if (jas_matrix_resize(data, height, width)) {
return -1;
}
}
jas_stream_t *const stream = cmpt->stream_;
const uint_least32_t cmpt_width = cmpt->width_;
const unsigned cps = cmpt->cps_;
const unsigned prec = cmpt->prec_;
const bool sgnd = cmpt->sgnd_;
dr = jas_matrix_getref(data, 0, 0);
const uint_least32_t drs = jas_matrix_rowstep(data);
jas_uchar stack_buffer[16384];
for (i = 0; i < height; ++i, dr += drs) {
d = dr;
if (jas_stream_seek(stream, (cmpt_width * (y + i) + x)
* cps, SEEK_SET) < 0) {
return -1;
}
if (cps == 1 && !sgnd && width <= 16384) {
/* fast path for 1 byte per sample and
unsigned with bulk reads */
jas_uchar *buffer = stack_buffer;
if (jas_stream_read(stream, buffer, width) != width) {
return -1;
}
for (j = 0; j < width; ++j) {
d[j] = buffer[j];
}
continue;
}
for (j = width; j > 0; --j, ++d) {
v = 0;
for (unsigned k = cps; k > 0; --k) {
if ((c = jas_stream_getc(stream)) == EOF) {
return -1;
}
v = (v << 8) | (c & 0xff);
}
*d = bitstoint(v, prec, sgnd);
}
}
return 0;
}
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)
{
jas_image_cmpt_t *cmpt;
jas_image_coord_t i;
jas_image_coord_t j;
jas_seqent_t v;
int c;
JAS_LOGDEBUGF(100, "jas_image_writecmpt(%p, %d, %ld, %ld, %ld, %ld, %p)\n",
image, cmptno, JAS_CAST(long, x), JAS_CAST(long, y),
JAS_CAST(long, width), JAS_CAST(long, height), data);
if (cmptno >= image->numcmpts_) {
return -1;
}
cmpt = image->cmpts_[cmptno];
if (x >= cmpt->width_ || y >= cmpt->height_ ||
x + width > cmpt->width_ ||
y + height > cmpt->height_) {
return -1;
}
if (!jas_matrix_numrows(data) || !jas_matrix_numcols(data)) {
return -1;
}
if (jas_matrix_numrows(data) != height ||
jas_matrix_numcols(data) != width) {
return -1;
}
jas_stream_t *const stream = cmpt->stream_;
const uint_least32_t cmpt_width = cmpt->width_;
const unsigned cps = cmpt->cps_;
const unsigned prec = cmpt->prec_;
const bool sgnd = cmpt->sgnd_;
const jas_seqent_t *dr = jas_matrix_getref(data, 0, 0);
const uint_least32_t drs = jas_matrix_rowstep(data);
jas_uchar stack_buffer[16384];
for (i = 0; i < height; ++i, dr += drs) {
const jas_seqent_t *d = dr;
if (jas_stream_seek(stream, (cmpt_width * (y + i) + x)
* cps, SEEK_SET) < 0) {
return -1;
}
if (cps == 1 && !sgnd && width <= 16384) {
/* fast path for 1 byte per sample and
unsigned with bulk writes */
jas_uchar *buffer = stack_buffer;
for (j = 0; j < width; ++j)
buffer[j] = d[j];
jas_stream_write(stream, buffer, width);
continue;
}
for (j = width; j > 0; --j, ++d) {
v = inttobits(*d, prec, sgnd);
for (unsigned k = cps; k > 0; --k) {
c = (v >> (8 * (cps - 1))) & 0xff;
if (jas_stream_putc(stream,
(unsigned char) c) == EOF) {
return -1;
}
v <<= 8;
}
}
}
return 0;
}
/******************************************************************************\
* File format operations.
\******************************************************************************/
static void jas_image_fmtinfo_init(jas_image_fmtinfo_t *fmtinfo)
{
fmtinfo->id = -1;
fmtinfo->name = 0;
fmtinfo->ext = 0;
fmtinfo->exts = 0;
fmtinfo->max_exts = 0;
fmtinfo->num_exts = 0;
fmtinfo->enabled = 0;
fmtinfo->desc = 0;
memset(&fmtinfo->ops, 0, sizeof(jas_image_fmtops_t));
}
static void jas_image_fmtinfo_cleanup(jas_image_fmtinfo_t *fmtinfo)
{
if (fmtinfo->name) {
jas_free(fmtinfo->name);
fmtinfo->name = 0;
}
if (fmtinfo->ext) {
jas_free(fmtinfo->ext);
fmtinfo->ext = 0;
}
if (fmtinfo->exts) {
assert(fmtinfo->max_exts > 0);
for (int i = 0; i < fmtinfo->num_exts; ++i) {
jas_free(fmtinfo->exts[i]);
}
jas_free(fmtinfo->exts);
fmtinfo->exts = 0;
}
if (fmtinfo->desc) {
jas_free(fmtinfo->desc);
fmtinfo->desc = 0;
}
}
JAS_EXPORT
const jas_image_fmtinfo_t *jas_image_getfmtbyind(int index)
{
jas_ctx_t *ctx = jas_get_ctx();
assert(index >= 0 && index < ctx->image_numfmts);
return &ctx->image_fmtinfos[index];
}
JAS_EXPORT
int jas_image_getnumfmts(void)
{
jas_ctx_t *ctx = jas_get_ctx();
return ctx->image_numfmts;
}
JAS_EXPORT
int jas_image_setfmtenable(int index, int enabled)
{
jas_ctx_t *ctx = jas_get_ctx();
ctx->image_fmtinfos[index].enabled = enabled;
return 0;
}
void jas_image_clearfmts_internal(jas_image_fmtinfo_t *image_fmtinfos,
size_t *image_numfmts)
{
jas_image_fmtinfo_t *fmtinfo;
for (int fmtind = 0; fmtind < *image_numfmts; ++fmtind) {
fmtinfo = &image_fmtinfos[fmtind];
jas_image_fmtinfo_cleanup(fmtinfo);
}
*image_numfmts = 0;
}
void jas_image_clearfmts()
{
jas_ctx_t *ctx = jas_get_ctx();
jas_image_clearfmts_internal(ctx->image_fmtinfos, &ctx->image_numfmts);
}
int jas_image_addfmt_internal(jas_image_fmtinfo_t *image_fmtinfos,
size_t *image_numfmts, int id, const char *name, const char *ext,
const char *desc, const jas_image_fmtops_t *ops)
{
const char delim[] = " \t";
int ret = 0;
jas_image_fmtinfo_t *fmtinfo = 0;
assert(id >= 0 && name && ext && ops);
if (*image_numfmts >= JAS_IMAGE_MAXFMTS) {
ret = -1;
goto done;
}
fmtinfo = &image_fmtinfos[*image_numfmts];
jas_image_fmtinfo_init(fmtinfo);
fmtinfo->id = id;
if (jas_stringtokenize(ext, delim, &fmtinfo->exts, &fmtinfo->max_exts,
&fmtinfo->num_exts)) {
assert(!fmtinfo->exts && !fmtinfo->max_exts && !fmtinfo->num_exts);
ret = -1;
goto done;
}
assert(fmtinfo->num_exts > 0);
char *primary_ext = fmtinfo->exts[0];
if (!(fmtinfo->name = jas_strdup(name))) {
ret = -1;
goto done;
}
if (!(fmtinfo->ext = jas_strdup(primary_ext))) {
ret = -1;
goto done;
}
if (!(fmtinfo->desc = jas_strdup(desc))) {
ret = -1;
goto done;
}
fmtinfo->ops = *ops;
++(*image_numfmts);
done:
if (ret && fmtinfo) {
jas_image_fmtinfo_cleanup(fmtinfo);
}
return ret;
}
int jas_image_addfmt(int id, const char *name, const char *ext,
const char *desc, const jas_image_fmtops_t *ops)
{
jas_ctx_t *ctx = jas_get_ctx();
return jas_image_addfmt_internal(ctx->image_fmtinfos, &ctx->image_numfmts,
id, name, ext, desc, ops);
}
/* This is for future consideration for addition to the library API. */
#if 0
JAS_EXPORT
int jas_image_delfmt(int fmtid)
{
if (fmtid < 0 || fmtid >= JAS_CAST(int, jas_image_numfmts)) {
return -1;
}
const jas_image_fmtinfo_t *fmtinfo;
if (!(fmtinfo = jas_image_lookupfmtbyid(fmtid))) {
return -1;
}
for (int i = fmtinfo - jas_image_fmtinfos; i < JAS_CAST(int,
jas_image_numfmts) - 1; ++i) {
jas_image_fmtinfos[i] = jas_image_fmtinfos[i + 1];
}
--jas_image_numfmts;
return 0;
}
#endif
int jas_image_strtofmt(const char *name)
{
const jas_image_fmtinfo_t *fmtinfo;
if (!(fmtinfo = jas_image_lookupfmtbyname(name))) {
return -1;
}
return fmtinfo->id;
}
const char *jas_image_fmttostr(int fmt)
{
const jas_image_fmtinfo_t *fmtinfo;
if (!(fmtinfo = jas_image_lookupfmtbyid(fmt))) {
return 0;
}
return fmtinfo->name;
}
int jas_image_getfmt(jas_stream_t *in)
{
jas_ctx_t *ctx = jas_get_ctx();
const jas_image_fmtinfo_t *fmtinfo;
/* Check for data in each of the supported formats. */
unsigned i;
for (i = 0, fmtinfo = ctx->image_fmtinfos; i < ctx->image_numfmts; ++i,
++fmtinfo) {
if (fmtinfo->enabled && fmtinfo->ops.validate) {
/* Is the input data valid for this format? */
JAS_LOGDEBUGF(20, "testing for format %s\n", fmtinfo->name);
if (!(*fmtinfo->ops.validate)(in)) {
JAS_LOGDEBUGF(20, "test succeeded\n");
return fmtinfo->id;
}
JAS_LOGDEBUGF(20, "test failed\n");
}
}
return -1;
}
int jas_image_fmtfromname(const char *name)
{
jas_ctx_t *ctx = jas_get_ctx();
const char *ext;
const jas_image_fmtinfo_t *fmtinfo;
/* Get the file name extension. */
if (!(ext = strrchr(name, '.'))) {
return -1;
}
++ext;
/* Try to find a format that uses this extension. */
unsigned i;
for (i = 0, fmtinfo = ctx->image_fmtinfos; i < ctx->image_numfmts; ++i,
++fmtinfo) {
/* Do we have a match? */
if (fmtinfo->enabled && !strcmp(ext, fmtinfo->ext)) {
return fmtinfo->id;
}
}
return -1;
}
/******************************************************************************\
* Miscellaneous operations.
\******************************************************************************/
bool jas_image_cmpt_domains_same(const jas_image_t *image)
{
jas_image_cmpt_t *cmpt;
jas_image_cmpt_t *cmpt0;
cmpt0 = image->cmpts_[0];
for (unsigned cmptno = 1; cmptno < image->numcmpts_; ++cmptno) {
cmpt = image->cmpts_[cmptno];
if (cmpt->tlx_ != cmpt0->tlx_ || cmpt->tly_ != cmpt0->tly_ ||
cmpt->hstep_ != cmpt0->hstep_ || cmpt->vstep_ != cmpt0->vstep_ ||
cmpt->width_ != cmpt0->width_ || cmpt->height_ != cmpt0->height_) {
return 0;
}
}
return 1;
}
uint_fast32_t jas_image_rawsize(const jas_image_t *image)
{
uint_fast32_t rawsize;
jas_image_cmpt_t *cmpt;
rawsize = 0;
for (unsigned cmptno = 0; cmptno < image->numcmpts_; ++cmptno) {
cmpt = image->cmpts_[cmptno];
rawsize += (cmpt->width_ * cmpt->height_ * cmpt->prec_ +
7) / 8;
}
return rawsize;
}
void jas_image_delcmpt(jas_image_t *image, unsigned cmptno)
{
if (cmptno >= image->numcmpts_) {
return;
}
jas_image_cmpt_destroy(image->cmpts_[cmptno]);
if (cmptno < image->numcmpts_) {
memmove(&image->cmpts_[cmptno], &image->cmpts_[cmptno + 1],
(image->numcmpts_ - 1 - cmptno) * sizeof(jas_image_cmpt_t *));
}
--image->numcmpts_;
jas_image_setbbox(image);
}
int jas_image_addcmpt(jas_image_t *image, int cmptno,
const jas_image_cmptparm_t *cmptparm)
{
jas_image_cmpt_t *newcmpt;
if (cmptno < 0) {
cmptno = image->numcmpts_;
}
assert(cmptno >= 0 && (unsigned)cmptno <= image->numcmpts_);
if (image->numcmpts_ >= image->maxcmpts_) {
if (jas_image_growcmpts(image, image->maxcmpts_ + 128)) {
return -1;
}
}
if (!(newcmpt = jas_image_cmpt_create(cmptparm->tlx,
cmptparm->tly, cmptparm->hstep, cmptparm->vstep,
cmptparm->width, cmptparm->height, cmptparm->prec,
cmptparm->sgnd, true))) {
return -1;
}
if ((unsigned)cmptno < image->numcmpts_) {
memmove(&image->cmpts_[cmptno + 1], &image->cmpts_[cmptno],
(image->numcmpts_ - (unsigned)cmptno) * sizeof(jas_image_cmpt_t *));
}
image->cmpts_[cmptno] = newcmpt;
++image->numcmpts_;
jas_image_setbbox(image);
return 0;
}
const jas_image_fmtinfo_t *jas_image_lookupfmtbyid(int id)
{
jas_ctx_t *ctx = jas_get_ctx();
unsigned i;
const jas_image_fmtinfo_t *fmtinfo;
for (i = 0, fmtinfo = ctx->image_fmtinfos; i < ctx->image_numfmts;
++i, ++fmtinfo) {
if (fmtinfo->id == id) {
return fmtinfo;
}
}
return 0;
}
const jas_image_fmtinfo_t *jas_image_lookupfmtbyname(const char *name)
{
jas_ctx_t *ctx = jas_get_ctx();
unsigned i;
const jas_image_fmtinfo_t *fmtinfo;
for (i = 0, fmtinfo = ctx->image_fmtinfos; i < ctx->image_numfmts;
++i, ++fmtinfo) {
if (!strcmp(fmtinfo->name, name)) {
return fmtinfo;
}
}
return 0;
}
static uint_fast32_t inttobits(jas_seqent_t v, unsigned prec, bool sgnd)
{
uint_fast32_t ret;
assert(v >= 0 || sgnd);
ret = ((sgnd && v < 0) ? (JAS_POW2_X(jas_seqent_t, prec) + v) : v) &
JAS_ONES(prec);
return ret;
}
static jas_seqent_t bitstoint(uint_fast32_t v, unsigned prec, bool sgnd)
{
jas_seqent_t ret;
v &= JAS_ONES(prec);
ret = (sgnd && (v & (1 << (prec - 1)))) ? (v - (1 << prec)) : v;
return ret;
}
static void jas_image_setbbox(jas_image_t *image)
{
jas_image_cmpt_t *cmpt;
int_fast32_t x;
int_fast32_t y;
if (image->numcmpts_ > 0) {
/* Determine the bounding box for all of the components on the
reference grid (i.e., the image area) */
cmpt = image->cmpts_[0];
image->tlx_ = cmpt->tlx_;
image->tly_ = cmpt->tly_;
image->brx_ = cmpt->tlx_ + cmpt->hstep_ * (cmpt->width_ - 1) + 1;
image->bry_ = cmpt->tly_ + cmpt->vstep_ * (cmpt->height_ - 1) + 1;
for (unsigned cmptno = 1; cmptno < image->numcmpts_; ++cmptno) {
cmpt = image->cmpts_[cmptno];
if (image->tlx_ > cmpt->tlx_) {
image->tlx_ = cmpt->tlx_;
}
if (image->tly_ > cmpt->tly_) {
image->tly_ = cmpt->tly_;
}
x = cmpt->tlx_ + cmpt->hstep_ * (cmpt->width_ - 1) + 1;
if (image->brx_ < x) {
image->brx_ = x;
}
y = cmpt->tly_ + cmpt->vstep_ * (cmpt->height_ - 1) + 1;
if (image->bry_ < y) {
image->bry_ = y;
}
}
} else {
image->tlx_ = 0;
image->tly_ = 0;
image->brx_ = 0;
image->bry_ = 0;
}
}
static int jas_image_growcmpts(jas_image_t *image, unsigned maxcmpts)
{
jas_image_cmpt_t **newcmpts;
newcmpts = (!image->cmpts_) ? jas_alloc2(maxcmpts,
sizeof(jas_image_cmpt_t *)) :
jas_realloc2(image->cmpts_, maxcmpts, sizeof(jas_image_cmpt_t *));
if (!newcmpts) {
return -1;
}
image->cmpts_ = newcmpts;
image->maxcmpts_ = maxcmpts;
for (unsigned cmptno = image->numcmpts_; cmptno < image->maxcmpts_; ++cmptno) {
image->cmpts_[cmptno] = 0;
}
return 0;
}
int jas_image_copycmpt(jas_image_t *dstimage, unsigned dstcmptno,
jas_image_t *srcimage, unsigned srccmptno)
{
jas_image_cmpt_t *newcmpt;
if (dstimage->numcmpts_ >= dstimage->maxcmpts_) {
if (jas_image_growcmpts(dstimage, dstimage->maxcmpts_ + 128)) {
return -1;
}
}
if (!(newcmpt = jas_image_cmpt_copy(srcimage->cmpts_[srccmptno]))) {
return -1;
}
if (dstcmptno < dstimage->numcmpts_) {
memmove(&dstimage->cmpts_[dstcmptno + 1], &dstimage->cmpts_[dstcmptno],
(dstimage->numcmpts_ - dstcmptno) * sizeof(jas_image_cmpt_t *));
}
dstimage->cmpts_[dstcmptno] = newcmpt;
++dstimage->numcmpts_;
jas_image_setbbox(dstimage);
return 0;
}
int jas_image_dump(jas_image_t *image, FILE *out)
{
long buf[1024];
jas_image_cmpt_t *cmpt;
for (unsigned cmptno = 0; cmptno < image->numcmpts_; ++cmptno) {
cmpt = image->cmpts_[cmptno];
fprintf(out, "prec=%d, sgnd=%d, cmpttype=%"PRIiFAST32"\n", cmpt->prec_,
cmpt->sgnd_, cmpt->type_);
const unsigned width = jas_image_cmptwidth(image, cmptno);
const unsigned height = jas_image_cmptheight(image, cmptno);
const unsigned n = JAS_MIN(16, width);
if (jas_image_readcmpt2(image, cmptno, 0, 0, n, 1, buf)) {
return -1;
}
for (unsigned i = 0; i < n; ++i) {
fprintf(out, " f(%d,%d)=%ld", i, 0, buf[i]);
}
fprintf(out, "\n");
if (jas_image_readcmpt2(image, cmptno, width - n, height - 1, n, 1,
buf)) {
return -1;
}
for (unsigned i = 0; i < n; ++i) {
fprintf(out, " f(%d,%d)=%ld", width - n + i, height - 1, buf[i]);
}
fprintf(out, "\n");
}
return 0;
}
int jas_image_depalettize(jas_image_t *image, unsigned cmptno,
unsigned numlutents, const int_fast32_t *lutents, unsigned dtype,
unsigned newcmptno)
{
jas_image_cmptparm_t cmptparms;
const jas_image_cmpt_t *cmpt = image->cmpts_[cmptno];
const uint_least32_t width = cmpt->width_;
const uint_least32_t height = cmpt->height_;
cmptparms.tlx = cmpt->tlx_;
cmptparms.tly = cmpt->tly_;
cmptparms.hstep = cmpt->hstep_;
cmptparms.vstep = cmpt->vstep_;
cmptparms.width = width;
cmptparms.height = height;
cmptparms.prec = JAS_IMAGE_CDT_GETPREC(dtype);
cmptparms.sgnd = JAS_IMAGE_CDT_GETSGND(dtype);
if (jas_image_addcmpt(image, newcmptno, &cmptparms)) {
return -1;
}
if (newcmptno <= cmptno) {
++cmptno;
}
for (uint_least32_t j = 0; j < height; ++j) {
for (uint_least32_t i = 0; i < width; ++i) {
int v = jas_image_readcmptsample(image, cmptno, i, j);
if (v < 0) {
v = 0;
} else if ((unsigned)v >= numlutents) {
assert(numlutents > 0);
v = numlutents - 1;
}
jas_image_writecmptsample(image, newcmptno, i, j,
lutents[v]);
}
}
return 0;
}
int jas_image_readcmptsample(jas_image_t *image, unsigned cmptno, unsigned x, unsigned y)
{
jas_image_cmpt_t *cmpt;
uint_fast32_t v;
int c;
cmpt = image->cmpts_[cmptno];
if (jas_stream_seek(cmpt->stream_, (cmpt->width_ * y + x) * cmpt->cps_,
SEEK_SET) < 0) {
return -1;
}
v = 0;
for (unsigned k = cmpt->cps_; k > 0; --k) {
if ((c = jas_stream_getc(cmpt->stream_)) == EOF) {
return -1;
}
v = (v << 8) | (c & 0xff);
}
return bitstoint(v, cmpt->prec_, cmpt->sgnd_);
}
void jas_image_writecmptsample(jas_image_t *image, unsigned cmptno, unsigned x, unsigned y,
int_fast32_t v)
{
jas_image_cmpt_t *cmpt;
uint_fast32_t t;
int c;
cmpt = image->cmpts_[cmptno];
if (jas_stream_seek(cmpt->stream_, (cmpt->width_ * y + x) * cmpt->cps_,
SEEK_SET) < 0) {
return;
}
t = inttobits(v, cmpt->prec_, cmpt->sgnd_);
for (unsigned k = cmpt->cps_; k > 0; --k) {
c = (t >> (8 * (cmpt->cps_ - 1))) & 0xff;
if (jas_stream_putc(cmpt->stream_, (unsigned char) c) == EOF) {
return;
}
t <<= 8;
}
}
int jas_image_getcmptbytype(const jas_image_t *image,
jas_image_cmpttype_t ctype)
{
for (unsigned cmptno = 0; cmptno < image->numcmpts_; ++cmptno) {
if (image->cmpts_[cmptno]->type_ == ctype) {
return cmptno;
}
}
return -1;
}
/***********************************************/
/***********************************************/
/***********************************************/
/***********************************************/
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)
{
jas_image_cmpt_t *cmpt;
jas_image_coord_t i;
jas_image_coord_t j;
long v;
long *bufptr;
if (cmptno >= image->numcmpts_) {
goto error;
}
cmpt = image->cmpts_[cmptno];
if (x < 0 || x >= cmpt->width_ || y < 0 || y >= cmpt->height_ ||
width < 0 || height < 0 || x + width > cmpt->width_ ||
y + height > cmpt->height_) {
goto error;
}
bufptr = buf;
for (i = 0; i < height; ++i) {
if (jas_stream_seek(cmpt->stream_, (cmpt->width_ * (y + i) + x)
* cmpt->cps_, SEEK_SET) < 0) {
goto error;
}
for (j = 0; j < width; ++j) {
if (getint(cmpt->stream_, cmpt->sgnd_, cmpt->prec_, &v)) {
goto error;
}
*bufptr++ = v;
}
}
return 0;
error:
return -1;
}
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)
{
jas_image_cmpt_t *cmpt;
jas_image_coord_t i;
jas_image_coord_t j;
long v;
if (cmptno >= image->numcmpts_) {
goto error;
}
cmpt = image->cmpts_[cmptno];
if (x < 0 || x >= cmpt->width_ || y < 0 || y >= cmpt->height_ ||
width < 0 || height < 0 || x + width > cmpt->width_ ||
y + height > cmpt->height_) {
goto error;
}
const long *bufptr = buf;
for (i = 0; i < height; ++i) {
if (jas_stream_seek(cmpt->stream_, (cmpt->width_ * (y + i) + x)
* cmpt->cps_, SEEK_SET) < 0) {
goto error;
}
for (j = 0; j < width; ++j) {
v = *bufptr++;
if (putint(cmpt->stream_, cmpt->sgnd_, cmpt->prec_, v)) {
goto error;
}
}
}
return 0;
error:
return -1;
}
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_image_coord_t tlx;
jas_image_coord_t tly;
jas_image_coord_t brx;
jas_image_coord_t bry;
jas_image_cmptparm_t cmptparm;
jas_image_coord_t ax;
jas_image_coord_t ay;
jas_image_coord_t bx;
jas_image_coord_t by;
jas_image_coord_t d0;
jas_image_coord_t d1;
jas_image_coord_t d2;
jas_image_coord_t d3;
jas_image_coord_t oldx;
jas_image_coord_t oldy;
jas_image_coord_t x;
jas_image_coord_t y;
long v;
jas_image_coord_t cmptbrx;
jas_image_coord_t cmptbry;
assert(cmptno < image->numcmpts_);
const jas_image_cmpt_t *const oldcmpt = image->cmpts_[cmptno];
assert(oldcmpt->tlx_ == 0 && oldcmpt->tly_ == 0);
jas_image_calcbbox2(image, &tlx, &tly, &brx, &bry);
const unsigned width = FLOORDIV(brx - ho + hs, hs);
const unsigned height = FLOORDIV(bry - vo + vs, vs);
cmptparm.tlx = ho;
cmptparm.tly = vo;
cmptparm.hstep = hs;
cmptparm.vstep = vs;
cmptparm.width = width;
cmptparm.height = height;
cmptparm.prec = prec;
cmptparm.sgnd = sgnd;
if (jas_image_addcmpt(image, newcmptno, &cmptparm)) {
goto error;
}
cmptbrx = oldcmpt->tlx_ + (oldcmpt->width_ - 1) * oldcmpt->hstep_;
cmptbry = oldcmpt->tly_ + (oldcmpt->height_ - 1) * oldcmpt->vstep_;
const jas_image_cmpt_t *const newcmpt = image->cmpts_[newcmptno];
jas_stream_rewind(newcmpt->stream_);
for (unsigned i = 0; i < height; ++i) {
y = newcmpt->tly_ + newcmpt->vstep_ * i;
for (unsigned j = 0; j < width; ++j) {
x = newcmpt->tlx_ + newcmpt->hstep_ * j;
ax = downtomult(x - oldcmpt->tlx_, oldcmpt->hstep_) + oldcmpt->tlx_;
ay = downtomult(y - oldcmpt->tly_, oldcmpt->vstep_) + oldcmpt->tly_;
bx = uptomult(x - oldcmpt->tlx_, oldcmpt->hstep_) + oldcmpt->tlx_;
if (bx > cmptbrx) {
bx = cmptbrx;
}
by = uptomult(y - oldcmpt->tly_, oldcmpt->vstep_) + oldcmpt->tly_;
if (by > cmptbry) {
by = cmptbry;
}
d0 = (ax - x) * (ax - x) + (ay - y) * (ay - y);
d1 = (bx - x) * (bx - x) + (ay - y) * (ay - y);
d2 = (bx - x) * (bx - x) + (by - y) * (by - y);
d3 = (ax - x) * (ax - x) + (by - y) * (by - y);
if (d0 <= d1 && d0 <= d2 && d0 <= d3) {
oldx = (ax - oldcmpt->tlx_) / oldcmpt->hstep_;
oldy = (ay - oldcmpt->tly_) / oldcmpt->vstep_;
} else if (d1 <= d0 && d1 <= d2 && d1 <= d3) {
oldx = (bx - oldcmpt->tlx_) / oldcmpt->hstep_;
oldy = (ay - oldcmpt->tly_) / oldcmpt->vstep_;
} else if (d2 <= d0 && d2 <= d1 && d1 <= d3) {
oldx = (bx - oldcmpt->tlx_) / oldcmpt->hstep_;
oldy = (by - oldcmpt->tly_) / oldcmpt->vstep_;
} else {
oldx = (ax - oldcmpt->tlx_) / oldcmpt->hstep_;
oldy = (by - oldcmpt->tly_) / oldcmpt->vstep_;
}
assert(oldx >= 0 && oldx < oldcmpt->width_ &&
oldy >= 0 && oldy < oldcmpt->height_);
if (jas_stream_seek(oldcmpt->stream_, oldcmpt->cps_ *
(oldy * oldcmpt->width_ + oldx), SEEK_SET) < 0) {
goto error;
}
if (getint(oldcmpt->stream_, oldcmpt->sgnd_,
oldcmpt->prec_, &v)) {
goto error;
}
if (newcmpt->prec_ != oldcmpt->prec_ ||
newcmpt->sgnd_ != oldcmpt->sgnd_) {
v = convert(v, oldcmpt->sgnd_, oldcmpt->prec_,
newcmpt->sgnd_, newcmpt->prec_);
}
if (putint(newcmpt->stream_, newcmpt->sgnd_,
newcmpt->prec_, v)) {
goto error;
}
}
}
return 0;
error:
return -1;
}
int jas_image_ishomosamp(const jas_image_t *image)
{
jas_image_coord_t hstep;
jas_image_coord_t vstep;
int result;
hstep = jas_image_cmpthstep(image, 0);
vstep = jas_image_cmptvstep(image, 0);
result = 1;
for (unsigned i = 0; i < image->numcmpts_; ++i) {
if (jas_image_cmpthstep(image, i) != hstep ||
jas_image_cmptvstep(image, i) != vstep) {
result = 0;
break;
}
}
return result;
}
/* Note: This function defines a bounding box differently. */
static void jas_image_calcbbox2(const jas_image_t *image,
jas_image_coord_t *tlx, jas_image_coord_t *tly, jas_image_coord_t *brx,
jas_image_coord_t *bry)
{
jas_image_coord_t tmptlx;
jas_image_coord_t tmptly;
jas_image_coord_t tmpbrx;
jas_image_coord_t tmpbry;
jas_image_coord_t t;
if (image->numcmpts_ > 0) {
const jas_image_cmpt_t *cmpt = image->cmpts_[0];
tmptlx = cmpt->tlx_;
tmptly = cmpt->tly_;
tmpbrx = cmpt->tlx_ + cmpt->hstep_ * (cmpt->width_ - 1);
tmpbry = cmpt->tly_ + cmpt->vstep_ * (cmpt->height_ - 1);
for (unsigned i = 0; i < image->numcmpts_; ++i) {
cmpt = image->cmpts_[i];
if (cmpt->tlx_ < tmptlx) {
tmptlx = cmpt->tlx_;
}
if (cmpt->tly_ < tmptly) {
tmptly = cmpt->tly_;
}
t = cmpt->tlx_ + cmpt->hstep_ * (cmpt->width_ - 1);
if (t > tmpbrx) {
tmpbrx = t;
}
t = cmpt->tly_ + cmpt->vstep_ * (cmpt->height_ - 1);
if (t > tmpbry) {
tmpbry = t;
}
}
} else {
tmptlx = 0;
tmptly = 0;
tmpbrx = -1;
tmpbry = -1;
}
*tlx = tmptlx;
*tly = tmptly;
*brx = tmpbrx;
*bry = tmpbry;
}
JAS_ATTRIBUTE_CONST
static inline long decode_twos_comp(jas_ulong c, unsigned prec)
{
long result;
assert(prec >= 2);
jas_logwarnf("warning: support for signed data is untested\n");
// NOTE: Is this correct?
result = (c & ((1 << (prec - 1)) - 1)) - (c & (1 << (prec - 1)));
return result;
}
JAS_ATTRIBUTE_CONST
static inline jas_ulong encode_twos_comp(long n, unsigned prec)
{
jas_ulong result;
assert(prec >= 2);
jas_logwarnf("warning: support for signed data is untested\n");
// NOTE: Is this correct?
if (n < 0) {
result = -n;
result = (result ^ 0xffffffffUL) + 1;
result &= (1 << prec) - 1;
} else {
result = n;
}
return result;
}
static int getint(jas_stream_t *in, bool sgnd, unsigned prec, long *val)
{
long v;
int c;
assert((!sgnd && prec >= 1) || (sgnd && prec >= 2));
v = 0;
for (unsigned n = (prec + 7) / 8; n-- > 0;) {
if ((c = jas_stream_getc(in)) == EOF) {
return -1;
}
v = (v << 8) | c;
}
v &= ((1 << prec) - 1);
if (sgnd) {
*val = decode_twos_comp(v, prec);
} else {
*val = v;
}
return 0;
}
static int putint(jas_stream_t *out, bool sgnd, unsigned prec, long val)
{
int c;
assert((!sgnd && prec >= 1) || (sgnd && prec >= 2));
if (sgnd) {
val = encode_twos_comp(val, prec);
}
assert(val >= 0);
val &= (1 << prec) - 1;
for (unsigned n = (prec + 7) / 8; n-- > 0;) {
c = (val >> (n * 8)) & 0xff;
if (jas_stream_putc(out, c) != c) {
return -1;
}
}
return 0;
}
static long convert(long val, bool oldsgnd, unsigned oldprec, bool newsgnd,
unsigned newprec)
{
/* TODO: The following code looks suspicious (i.e., an empty if body). */
if (newsgnd != oldsgnd) {
}
if (newprec != oldprec) {
if (newprec > oldprec) {
val <<= newprec - oldprec;
} else if (oldprec > newprec) {
val >>= oldprec - newprec;
}
}
return val;
}
static long downtomult(long x, long y)
{
assert(x >= 0);
return (x / y) * y;
}
static long uptomult(long x, long y)
{
assert(x >= 0);
return ((x + y - 1) / y) * y;
}
jas_image_t *jas_image_chclrspc(jas_image_t *image,
const jas_cmprof_t *outprof, jas_cmxform_intent_t intent)
{
jas_image_t *inimage;
int k;
jas_image_t *outimage;
jas_cmprof_t *inprof;
jas_cmprof_t *tmpprof;
jas_image_cmptparm_t cmptparm;
jas_cmxform_t *xform;
jas_cmpixmap_t inpixmap;
jas_cmpixmap_t outpixmap;
jas_cmcmptfmt_t *incmptfmts;
jas_cmcmptfmt_t *outcmptfmts;
#if 0
jas_eprintf("IMAGE\n");
jas_image_dump(image, stderr);
#endif
if (image->numcmpts_ == 0) {
/*
can't work with a file with no components;
continuing would crash because we'd attempt to
obtain information about the first component
*/
return 0;
}
outimage = 0;
xform = 0;
if (!(inimage = jas_image_copy(image))) {
goto error;
}
if (!jas_image_ishomosamp(inimage)) {
unsigned minhstep = jas_image_cmpthstep(inimage, 0);
unsigned minvstep = jas_image_cmptvstep(inimage, 0);
for (unsigned i = 1; i < jas_image_numcmpts(inimage); ++i) {
const unsigned hstep = jas_image_cmpthstep(inimage, i);
const unsigned vstep = jas_image_cmptvstep(inimage, i);
if (hstep < minhstep) {
minhstep = hstep;
}
if (vstep < minvstep) {
minvstep = vstep;
}
}
unsigned n = jas_image_numcmpts(inimage);
for (unsigned i = 0; i < n; ++i) {
if (jas_image_sampcmpt(inimage, i, i + 1, 0, 0, minhstep, minvstep,
jas_image_cmptsgnd(inimage, i), jas_image_cmptprec(inimage,
i))) {
goto error;
}
const jas_image_cmpttype_t cmpttype = jas_image_cmpttype(inimage,
i);
jas_image_setcmpttype(inimage, i + 1, cmpttype);
jas_image_delcmpt(inimage, i);
}
}
const unsigned width = jas_image_cmptwidth(inimage, 0);
const unsigned height = jas_image_cmptheight(inimage, 0);
const unsigned hstep = jas_image_cmpthstep(inimage, 0);
const unsigned vstep = jas_image_cmptvstep(inimage, 0);
if (!(inprof = jas_image_cmprof(inimage))) {
// formerly call to abort()
goto error;
}
const unsigned numinclrchans =
jas_clrspc_numchans(jas_cmprof_clrspc(inprof));
const unsigned numoutclrchans =
jas_clrspc_numchans(jas_cmprof_clrspc(outprof));
const unsigned prec = 8;
if (!(outimage = jas_image_create0())) {
goto error;
}
/* Create a component for each of the colorants. */
for (unsigned i = 0; i < numoutclrchans; ++i) {
cmptparm.tlx = 0;
cmptparm.tly = 0;
cmptparm.hstep = hstep;
cmptparm.vstep = vstep;
cmptparm.width = width;
cmptparm.height = height;
cmptparm.prec = prec;
cmptparm.sgnd = 0;
if (jas_image_addcmpt(outimage, -1, &cmptparm)) {
goto error;
}
jas_image_setcmpttype(outimage, i, JAS_IMAGE_CT_COLOR(i));
}
#if 0
/* Copy the auxiliary components without modification. */
for (i = 0; i < jas_image_numcmpts(inimage); ++i) {
if (!ISCOLOR(jas_image_cmpttype(inimage, i))) {
jas_image_copycmpt(outimage, -1, inimage, i);
/* XXX - need to specify laydown of component on ref. grid */
}
}
#endif
if (!(tmpprof = jas_cmprof_copy(outprof))) {
goto error;
}
assert(!jas_image_cmprof(outimage));
jas_image_setcmprof(outimage, tmpprof);
jas_image_setclrspc(outimage, jas_cmprof_clrspc(outprof));
if (!(xform = jas_cmxform_create(inprof, outprof, 0, JAS_CMXFORM_OP_FWD,
intent, JAS_CMXFORM_OPTM_SPEED))) {
goto error;
}
inpixmap.numcmpts = numinclrchans;
if (!(incmptfmts = jas_alloc2(numinclrchans, sizeof(jas_cmcmptfmt_t)))) {
// formerly call to abort()
goto error;
}
inpixmap.cmptfmts = incmptfmts;
for (unsigned i = 0; i < numinclrchans; ++i) {
const int j = jas_image_getcmptbytype(inimage, JAS_IMAGE_CT_COLOR(i));
if (!(incmptfmts[i].buf = jas_alloc2(width, sizeof(long)))) {
goto error;
}
incmptfmts[i].prec = jas_image_cmptprec(inimage, j);
incmptfmts[i].sgnd = jas_image_cmptsgnd(inimage, j);
incmptfmts[i].width = width;
incmptfmts[i].height = 1;
}
outpixmap.numcmpts = numoutclrchans;
if (!(outcmptfmts = jas_alloc2(numoutclrchans, sizeof(jas_cmcmptfmt_t)))) {
// formerly call to abort()
goto error;
}
outpixmap.cmptfmts = outcmptfmts;
for (unsigned i = 0; i < numoutclrchans; ++i) {
const int j = jas_image_getcmptbytype(outimage, JAS_IMAGE_CT_COLOR(i));
if (!(outcmptfmts[i].buf = jas_alloc2(width, sizeof(long)))) {
goto error;
}
outcmptfmts[i].prec = jas_image_cmptprec(outimage, j);
outcmptfmts[i].sgnd = jas_image_cmptsgnd(outimage, j);
outcmptfmts[i].width = width;
outcmptfmts[i].height = 1;
}
for (unsigned i = 0; i < height; ++i) {
for (unsigned j = 0; j < numinclrchans; ++j) {
k = jas_image_getcmptbytype(inimage, JAS_IMAGE_CT_COLOR(j));
if (jas_image_readcmpt2(inimage, k, 0, i, width, 1,
incmptfmts[j].buf)) {
goto error;
}
}
jas_cmxform_apply(xform, &inpixmap, &outpixmap);
for (unsigned j = 0; j < numoutclrchans; ++j) {
k = jas_image_getcmptbytype(outimage, JAS_IMAGE_CT_COLOR(j));
if (jas_image_writecmpt2(outimage, k, 0, i, width, 1,
outcmptfmts[j].buf)) {
goto error;
}
}
}
for (unsigned i = 0; i < numoutclrchans; ++i) {
jas_free(outcmptfmts[i].buf);
}
jas_free(outcmptfmts);
for (unsigned i = 0; i < numinclrchans; ++i) {
jas_free(incmptfmts[i].buf);
}
jas_free(incmptfmts);
jas_cmxform_destroy(xform);
jas_image_destroy(inimage);
#if 0
jas_eprintf("INIMAGE\n");
jas_image_dump(inimage, stderr);
jas_eprintf("OUTIMAGE\n");
jas_image_dump(outimage, stderr);
#endif
return outimage;
error:
if (xform) {
jas_cmxform_destroy(xform);
}
if (inimage) {
jas_image_destroy(inimage);
}
if (outimage) {
jas_image_destroy(outimage);
}
return 0;
}