67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup freestyle
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*/
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#include "SceneHash.h"
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#include <sstream>
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namespace Freestyle {
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string SceneHash::toString()
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{
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stringstream ss;
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ss << hex << _sum;
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return ss.str();
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}
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void SceneHash::visitNodeViewLayer(NodeViewLayer &node)
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{
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struct RenderData *r = &node.scene().r;
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adler32((uchar *)&r->xsch, sizeof(r->xsch)); // resolution_x
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adler32((uchar *)&r->ysch, sizeof(r->ysch)); // resolution_y
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adler32((uchar *)&r->size, sizeof(r->size)); // resolution_percentage
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struct FreestyleConfig *config = &node.sceneLayer().freestyle_config;
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adler32((uchar *)&config->flags, sizeof(config->flags));
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adler32((uchar *)&config->crease_angle, sizeof(config->crease_angle));
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adler32((uchar *)&config->sphere_radius, sizeof(config->sphere_radius));
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adler32((uchar *)&config->dkr_epsilon, sizeof(config->dkr_epsilon));
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}
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void SceneHash::visitNodeCamera(NodeCamera &cam)
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{
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double *proj = cam.projectionMatrix();
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for (int i = 0; i < 16; i++) {
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adler32((uchar *)&proj[i], sizeof(double));
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}
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}
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void SceneHash::visitIndexedFaceSet(IndexedFaceSet &ifs)
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{
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const float *v = ifs.vertices();
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const unsigned n = ifs.vsize();
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for (unsigned i = 0; i < n; i++) {
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adler32((uchar *)&v[i], sizeof(v[i]));
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}
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}
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static const int MOD_ADLER = 65521;
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void SceneHash::adler32(const uchar *data, int size)
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{
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uint32_t sum1 = _sum & 0xffff;
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uint32_t sum2 = (_sum >> 16) & 0xffff;
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for (int i = 0; i < size; i++) {
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sum1 = (sum1 + data[i]) % MOD_ADLER;
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sum2 = (sum1 + sum2) % MOD_ADLER;
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}
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_sum = sum1 | (sum2 << 16);
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}
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} /* namespace Freestyle */
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