diff options
Diffstat (limited to 'intern/cycles/render/filter.cpp')
| -rw-r--r-- | intern/cycles/render/filter.cpp | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/intern/cycles/render/filter.cpp b/intern/cycles/render/filter.cpp deleted file mode 100644 index 0bd4fb4d579..00000000000 --- a/intern/cycles/render/filter.cpp +++ /dev/null @@ -1,142 +0,0 @@ -/* - * Copyright 2011, Blender Foundation. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include "camera.h" -#include "device.h" -#include "filter.h" -#include "scene.h" - -#include "kernel_types.h" - -#include "util_algorithm.h" -#include "util_debug.h" -#include "util_math.h" - -CCL_NAMESPACE_BEGIN - -Filter::Filter() -{ - filter_type = FILTER_BOX; - filter_width = 1.0f; - need_update = true; -} - -Filter::~Filter() -{ -} - -static float filter_func_box(float v, float width) -{ - return (float)1; -} - -static float filter_func_gaussian(float v, float width) -{ - v *= (float)2/width; - return (float)expf((float)-2*v*v); -} - -static vector<float> filter_table(FilterType type, float width) -{ - const int filter_table_size = FILTER_TABLE_SIZE-1; - vector<float> filter_table_cdf(filter_table_size+1); - vector<float> filter_table(filter_table_size+1); - float (*filter_func)(float, float) = NULL; - int i, half_size = filter_table_size/2; - - switch(type) { - case FILTER_BOX: - filter_func = filter_func_box; - break; - case FILTER_GAUSSIAN: - filter_func = filter_func_gaussian; - break; - default: - assert(0); - } - - /* compute cumulative distribution function */ - filter_table_cdf[0] = 0.0f; - - for(i = 0; i < filter_table_size; i++) { - float x = i*width*0.5f/(filter_table_size-1); - float y = filter_func(x, width); - filter_table_cdf[i+1] += filter_table_cdf[i] + fabsf(y); - } - - for(i = 0; i <= filter_table_size; i++) - filter_table_cdf[i] /= filter_table_cdf[filter_table_size]; - - /* create importance sampling table */ - for(i = 0; i <= half_size; i++) { - float x = i/(float)half_size; - int index = upper_bound(filter_table_cdf.begin(), filter_table_cdf.end(), x) - filter_table_cdf.begin(); - float t; - - if(index < filter_table_size+1) { - t = (x - filter_table_cdf[index])/(filter_table_cdf[index+1] - filter_table_cdf[index]); - } - else { - t = 0.0f; - index = filter_table_size; - } - - float y = ((index + t)/(filter_table_size))*width; - - filter_table[half_size+i] = 0.5f*(1.0f + y); - filter_table[half_size-i] = 0.5f*(1.0f - y); - } - - return filter_table; -} - -void Filter::device_update(Device *device, DeviceScene *dscene) -{ - if(!need_update) - return; - - device_free(device, dscene); - - /* update __filter_table */ - vector<float> table = filter_table(filter_type, filter_width); - - dscene->filter_table.copy(&table[0], table.size()); - device->tex_alloc("__filter_table", dscene->filter_table, true); - - need_update = false; -} - -void Filter::device_free(Device *device, DeviceScene *dscene) -{ - device->tex_free(dscene->filter_table); - dscene->filter_table.clear(); -} - -bool Filter::modified(const Filter& filter) -{ - return !(filter_type == filter.filter_type && - filter_width == filter.filter_width); -} - -void Filter::tag_update(Scene *scene) -{ - need_update = true; -} - -CCL_NAMESPACE_END - |