forked from bartvdbraak/blender
112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "device.h"
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#include "scene.h"
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#include "tables.h"
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#include "util_debug.h"
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CCL_NAMESPACE_BEGIN
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/* Lookup Tables */
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LookupTables::LookupTables()
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{
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need_update = true;
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}
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LookupTables::~LookupTables()
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{
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assert(lookup_tables.size() == 0);
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}
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void LookupTables::device_update(Device *device, DeviceScene *dscene)
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{
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if(!need_update)
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return;
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device->tex_free(dscene->lookup_table);
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if(lookup_tables.size() > 0)
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device->tex_alloc("__lookup_table", dscene->lookup_table);
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need_update = false;
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}
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void LookupTables::device_free(Device *device, DeviceScene *dscene)
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{
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device->tex_free(dscene->lookup_table);
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dscene->lookup_table.clear();
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}
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static size_t round_up_to_multiple(size_t size, size_t chunk)
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{
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return ((size + chunk - 1)/chunk) * chunk;
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}
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size_t LookupTables::add_table(DeviceScene *dscene, vector<float>& data)
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{
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assert(data.size() > 0);
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need_update = true;
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Table new_table;
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new_table.offset = 0;
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new_table.size = round_up_to_multiple(data.size(), TABLE_CHUNK_SIZE);
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/* find space to put lookup table */
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list<Table>::iterator table;
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for(table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
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if(new_table.offset + new_table.size <= table->offset) {
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lookup_tables.insert(table, new_table);
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break;
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}
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else
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new_table.offset = table->offset + table->size;
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}
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if(table == lookup_tables.end()) {
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/* add at the end */
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lookup_tables.push_back(new_table);
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dscene->lookup_table.resize(new_table.offset + new_table.size);
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}
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/* copy table data and return offset */
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dscene->lookup_table.copy_at(&data[0], new_table.offset, data.size());
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return new_table.offset;
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}
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void LookupTables::remove_table(size_t offset)
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{
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need_update = true;
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list<Table>::iterator table;
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for(table = lookup_tables.begin(); table != lookup_tables.end(); table++) {
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if(table->offset == offset) {
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lookup_tables.erase(table);
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return;
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}
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}
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assert(table != lookup_tables.end());
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}
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CCL_NAMESPACE_END
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