openjpeg/libopenjpeg/image.c

129 lines
4.5 KiB
C

/*
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opj_includes.h"
opj_image_t* opj_image_create0(void) {
opj_image_t *image = (opj_image_t*)opj_calloc(1, sizeof(opj_image_t));
return image;
}
opj_image_t* OPJ_CALLCONV opj_image_create(int numcmpts, opj_image_cmptparm_t *cmptparms, OPJ_COLOR_SPACE clrspc) {
int compno;
opj_image_t *image = NULL;
image = (opj_image_t*) opj_calloc(1, sizeof(opj_image_t));
if(image) {
image->color_space = clrspc;
image->numcomps = numcmpts;
/* allocate memory for the per-component information */
image->comps = (opj_image_comp_t*)opj_malloc(image->numcomps * sizeof(opj_image_comp_t));
if(!image->comps) {
fprintf(stderr,"Unable to allocate memory for image.\n");
opj_image_destroy(image);
return NULL;
}
/* create the individual image components */
for(compno = 0; compno < numcmpts; compno++) {
opj_image_comp_t *comp = &image->comps[compno];
comp->dx = cmptparms[compno].dx;
comp->dy = cmptparms[compno].dy;
comp->w = cmptparms[compno].w;
comp->h = cmptparms[compno].h;
comp->x0 = cmptparms[compno].x0;
comp->y0 = cmptparms[compno].y0;
comp->prec = cmptparms[compno].prec;
comp->bpp = cmptparms[compno].bpp;
comp->sgnd = cmptparms[compno].sgnd;
comp->data = (int*) opj_calloc(comp->w * comp->h, sizeof(int));
if(!comp->data) {
fprintf(stderr,"Unable to allocate memory for image.\n");
opj_image_destroy(image);
return NULL;
}
}
}
return image;
}
void OPJ_CALLCONV opj_image_destroy(opj_image_t *image) {
if(image) {
if(image->comps) {
OPJ_UINT32 compno;
/* image components */
for(compno = 0; compno < image->numcomps; compno++) {
opj_image_comp_t *image_comp = &(image->comps[compno]);
if(image_comp->data) {
opj_free(image_comp->data);
}
}
opj_free(image->comps);
}
if(image->icc_profile_buf) {
opj_free(image->icc_profile_buf);
}
opj_free(image);
}
}
/**
* Updates the components characteristics of the image from the coding parameters.
*
* @param p_image_header the image header to update.
* @param p_cp the coding parameters from which to update the image.
*/
void opj_image_comp_header_update(opj_image_t * p_image_header, const struct opj_cp_v2 * p_cp)
{
OPJ_UINT32 i, l_width, l_height;
OPJ_INT32 l_x0, l_y0, l_x1, l_y1;
OPJ_INT32 l_comp_x0, l_comp_y0, l_comp_x1, l_comp_y1;
opj_image_comp_t* l_img_comp = NULL;
l_x0 = int_max(p_cp->tx0 , p_image_header->x0);
l_y0 = int_max(p_cp->ty0 , p_image_header->y0);
l_x1 = int_min(p_cp->tx0 + p_cp->tw * p_cp->tdx, p_image_header->x1);
l_y1 = int_min(p_cp->ty0 + p_cp->th * p_cp->tdy, p_image_header->y1);
l_img_comp = p_image_header->comps;
for (i = 0; i < p_image_header->numcomps; ++i) {
l_comp_x0 = int_ceildiv(l_x0, l_img_comp->dx);
l_comp_y0 = int_ceildiv(l_y0, l_img_comp->dy);
l_comp_x1 = int_ceildiv(l_x1, l_img_comp->dx);
l_comp_y1 = int_ceildiv(l_y1, l_img_comp->dy);
l_width = int_ceildivpow2(l_comp_x1 - l_comp_x0, l_img_comp->factor);
l_height = int_ceildivpow2(l_comp_y1 - l_comp_y0, l_img_comp->factor);
l_img_comp->w = l_width;
l_img_comp->h = l_height;
l_img_comp->x0 = l_comp_x0/*l_x0*/;
l_img_comp->y0 = l_comp_y0/*l_y0*/;
++l_img_comp;
}
}