da376e0237
Cycles uses code from some great open source projects, many thanks them: * BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs": http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ * Open Shading Language for a large part of the shading system: http://code.google.com/p/openshadinglanguage/ * Blender for procedural textures and a few other nodes. * Approximate Catmull Clark subdivision from NVidia Mesh tools: http://code.google.com/p/nvidia-mesh-tools/ * Sobol direction vectors from: http://web.maths.unsw.edu.au/~fkuo/sobol/ * Film response functions from: http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
94 lines
2.1 KiB
C++
94 lines
2.1 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include "util_cache.h"
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#include "util_foreach.h"
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#include "util_md5.h"
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#include "util_path.h"
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#include "util_types.h"
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CCL_NAMESPACE_BEGIN
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/* CacheData */
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CacheData::CacheData(const string& name_)
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{
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name = name_;
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f = NULL;
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}
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CacheData::~CacheData()
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{
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if(f)
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fclose(f);
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}
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/* Cache */
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Cache Cache::global;
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string Cache::data_filename(const CacheData& key)
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{
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MD5Hash hash;
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foreach(const CacheBuffer& buffer, key.buffers)
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hash.append((uint8_t*)buffer.data, buffer.size);
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string fname = key.name + "_" + hash.get_hex();
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return path_get("cache/" + fname);
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}
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void Cache::insert(const CacheData& key, const CacheData& value)
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{
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string filename = data_filename(key);
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FILE *f = fopen(filename.c_str(), "wb");
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if(!f) {
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fprintf(stderr, "Failed to open file %s for writing.\n", filename.c_str());
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return;
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}
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foreach(const CacheBuffer& buffer, value.buffers) {
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if(!fwrite(&buffer.size, sizeof(buffer.size), 1, f))
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fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
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if(!fwrite(buffer.data, buffer.size, 1, f))
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fprintf(stderr, "Failed to write to file %s.\n", filename.c_str());
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}
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fclose(f);
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}
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bool Cache::lookup(const CacheData& key, CacheData& value)
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{
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string filename = data_filename(key);
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FILE *f = fopen(filename.c_str(), "rb");
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if(!f)
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return false;
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value.name = key.name;
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value.f = f;
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return true;
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}
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CCL_NAMESPACE_END
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