124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/*
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opj_includes.h"
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opj_image_t* opj_image_create0(void) {
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opj_image_t *image = (opj_image_t*)opj_calloc(1, sizeof(opj_image_t));
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return image;
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}
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opj_image_t* OPJ_CALLCONV opj_image_create(int numcmpts, opj_image_cmptparm_t *cmptparms, OPJ_COLOR_SPACE clrspc) {
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int compno;
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opj_image_t *image = NULL;
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image = (opj_image_t*) opj_calloc(1, sizeof(opj_image_t));
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if(image) {
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image->color_space = clrspc;
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image->numcomps = numcmpts;
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/* allocate memory for the per-component information */
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image->comps = (opj_image_comp_t*)opj_malloc(image->numcomps * sizeof(opj_image_comp_t));
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if(!image->comps) {
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fprintf(stderr,"Unable to allocate memory for image.\n");
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opj_image_destroy(image);
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return NULL;
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}
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/* create the individual image components */
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for(compno = 0; compno < numcmpts; compno++) {
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opj_image_comp_t *comp = &image->comps[compno];
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comp->dx = cmptparms[compno].dx;
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comp->dy = cmptparms[compno].dy;
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comp->w = cmptparms[compno].w;
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comp->h = cmptparms[compno].h;
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comp->x0 = cmptparms[compno].x0;
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comp->y0 = cmptparms[compno].y0;
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comp->prec = cmptparms[compno].prec;
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comp->bpp = cmptparms[compno].bpp;
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comp->sgnd = cmptparms[compno].sgnd;
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comp->data = (int*) opj_calloc(comp->w * comp->h, sizeof(int));
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if(!comp->data) {
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fprintf(stderr,"Unable to allocate memory for image.\n");
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opj_image_destroy(image);
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return NULL;
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}
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}
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}
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return image;
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}
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void OPJ_CALLCONV opj_image_destroy(opj_image_t *image) {
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int i;
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if(image) {
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if(image->comps) {
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/* image components */
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for(i = 0; i < image->numcomps; i++) {
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opj_image_comp_t *image_comp = &image->comps[i];
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if(image_comp->data) {
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opj_free(image_comp->data);
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}
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}
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opj_free(image->comps);
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}
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opj_free(image);
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}
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}
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/**
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* Updates the components of the image from the coding parameters.
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*
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* @param p_image the image to update.
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* @param p_cp the coding parameters from which to update the image.
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*/
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void opj_image_comp_update(opj_image_t * p_image,const opj_cp_v2_t * p_cp)
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{
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OPJ_UINT32 i, l_width, l_height;
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OPJ_INT32 l_x0,l_y0,l_x1,l_y1;
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OPJ_INT32 l_comp_x0,l_comp_y0,l_comp_x1,l_comp_y1;
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opj_image_comp_t * l_img_comp = 00;
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l_x0 = int_max(p_cp->tx0 , p_image->x0);
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l_y0 = int_max(p_cp->ty0 , p_image->y0);
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l_x1 = int_min(p_cp->tx0 + p_cp->tw * p_cp->tdx, p_image->x1);
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l_y1 = int_min(p_cp->ty0 + p_cp->th * p_cp->tdy, p_image->y1);
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l_img_comp = p_image->comps;
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for (i = 0; i < p_image->numcomps; ++i) {
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l_comp_x0 = int_ceildiv(l_x0, l_img_comp->dx);
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l_comp_y0 = int_ceildiv(l_y0, l_img_comp->dy);
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l_comp_x1 = int_ceildiv(l_x1, l_img_comp->dx);
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l_comp_y1 = int_ceildiv(l_y1, l_img_comp->dy);
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l_width = int_ceildivpow2(l_comp_x1 - l_comp_x0, l_img_comp->factor);
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l_height = int_ceildivpow2(l_comp_y1 - l_comp_y0, l_img_comp->factor);
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l_img_comp->w = l_width;
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l_img_comp->h = l_height;
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l_img_comp->x0 = l_x0;
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l_img_comp->y0 = l_y0;
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++l_img_comp;
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}
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}
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