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