C++ (Cpp) opj_int_ceildiv Examples

Example #1

File: image.c Project: AFQuentin/openjpeg

/**
 * 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 * 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 = opj_int_max((OPJ_INT32)p_cp->tx0 , (OPJ_INT32)p_image_header->x0);
	l_y0 = opj_int_max((OPJ_INT32)p_cp->ty0 , (OPJ_INT32)p_image_header->y0);
	l_x1 = opj_int_min((OPJ_INT32)(p_cp->tx0 + p_cp->tw * p_cp->tdx), (OPJ_INT32)p_image_header->x1);
	l_y1 = opj_int_min((OPJ_INT32)(p_cp->ty0 + p_cp->th * p_cp->tdy), (OPJ_INT32)p_image_header->y1);

	l_img_comp = p_image_header->comps;
	for	(i = 0; i < p_image_header->numcomps; ++i) {
		l_comp_x0 = opj_int_ceildiv(l_x0, (OPJ_INT32)l_img_comp->dx);
		l_comp_y0 = opj_int_ceildiv(l_y0, (OPJ_INT32)l_img_comp->dy);
		l_comp_x1 = opj_int_ceildiv(l_x1, (OPJ_INT32)l_img_comp->dx);
		l_comp_y1 = opj_int_ceildiv(l_y1, (OPJ_INT32)l_img_comp->dy);
		l_width = (OPJ_UINT32)opj_int_ceildivpow2(l_comp_x1 - l_comp_x0, (OPJ_INT32)l_img_comp->factor);
		l_height = (OPJ_UINT32)opj_int_ceildivpow2(l_comp_y1 - l_comp_y0, (OPJ_INT32)l_img_comp->factor);
		l_img_comp->w = l_width;
		l_img_comp->h = l_height;
		l_img_comp->x0 = (OPJ_UINT32)l_comp_x0/*l_x0*/;
		l_img_comp->y0 = (OPJ_UINT32)l_comp_y0/*l_y0*/;
		++l_img_comp;
	}
}

Example #2

File: util.cpp Project: ksclarke/ronin

void opj_rect_subsample(opj_rect_t* r, uint32_t dx, uint32_t dy)
{
    if (!r)
        return;

    r->x0 = opj_int_ceildiv(r->x0, (int32_t)dx);
    r->y0 = opj_int_ceildiv(r->y0, (int32_t)dy);
    r->x1 = opj_int_ceildiv(r->x1, (int32_t)dx);
    r->y1 = opj_int_ceildiv(r->y1, (int32_t)dy);
}