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blender/intern/cycles/render/film.cpp
Dalai Felinto eec3eaba08 Cycles Bake 
Expand Cycles to use the new baking API in Blender.

It works on the selected object, and the panel can be accessed in the Render panel (similar to where it is for the Blender Internal).

It bakes for the active texture of each material of the object. The active texture is currently defined as the active Image Texture node present in the material nodetree. If you don't want the baking to override an existent material, make sure the active Image Texture node is not connected to the nodetree. The active texture is also the texture shown in the viewport in the rendered mode.

Remember to save your images after the baking is complete.

Note: Bake currently only works in the CPU
Note: This is not supported by Cycles standalone because a lot of the work is done in Blender as part of the operator only, not the engine (Cycles).

Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Bake

Supported Passes:
-----------------
Data Passes
 * Normal
 * UV
 * Diffuse/Glossy/Transmission/Subsurface/Emit Color

Light Passes
 * AO
 * Combined
 * Shadow
 * Diffuse/Glossy/Transmission/Subsurface/Emit Direct/Indirect
 * Environment

Review: D421
Reviewed by: Campbell Barton, Brecht van Lommel, Sergey Sharybin, Thomas Dinge

Original design by Brecht van Lommel.

The entire commit history can be found on the branch: bake-cycles
2014-05-02 21:19:09 -03:00

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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 "camera.h"
#include "device.h"
#include "film.h"
#include "integrator.h"
#include "mesh.h"
#include "scene.h"
#include "tables.h"
#include "util_algorithm.h"
#include "util_debug.h"
#include "util_foreach.h"
#include "util_math.h"
CCL_NAMESPACE_BEGIN
/* Pass */
static bool compare_pass_order(const Pass& a, const Pass& b)
{
if(a.components == b.components)
return (a.type < b.type);
return (a.components > b.components);
}
void Pass::add(PassType type, vector<Pass>& passes)
{
foreach(Pass& existing_pass, passes)
if(existing_pass.type == type)
return;
Pass pass;
pass.type = type;
pass.filter = true;
pass.exposure = false;
pass.divide_type = PASS_NONE;
switch(type) {
case PASS_NONE:
pass.components = 0;
break;
case PASS_COMBINED:
pass.components = 4;
pass.exposure = true;
break;
case PASS_DEPTH:
pass.components = 1;
pass.filter = false;
break;
case PASS_MIST:
pass.components = 1;
break;
case PASS_NORMAL:
pass.components = 4;
break;
case PASS_UV:
pass.components = 4;
break;
case PASS_MOTION:
pass.components = 4;
pass.divide_type = PASS_MOTION_WEIGHT;
break;
case PASS_MOTION_WEIGHT:
pass.components = 1;
break;
case PASS_OBJECT_ID:
pass.components = 1;
pass.filter = false;
break;
case PASS_MATERIAL_ID:
pass.components = 1;
pass.filter = false;
break;
case PASS_DIFFUSE_COLOR:
pass.components = 4;
break;
case PASS_GLOSSY_COLOR:
pass.components = 4;
break;
case PASS_TRANSMISSION_COLOR:
pass.components = 4;
break;
case PASS_SUBSURFACE_COLOR:
pass.components = 4;
break;
case PASS_DIFFUSE_INDIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_DIFFUSE_COLOR;
break;
case PASS_GLOSSY_INDIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_GLOSSY_COLOR;
break;
case PASS_TRANSMISSION_INDIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_TRANSMISSION_COLOR;
break;
case PASS_SUBSURFACE_INDIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_SUBSURFACE_COLOR;
break;
case PASS_DIFFUSE_DIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_DIFFUSE_COLOR;
break;
case PASS_GLOSSY_DIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_GLOSSY_COLOR;
break;
case PASS_TRANSMISSION_DIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_TRANSMISSION_COLOR;
break;
case PASS_SUBSURFACE_DIRECT:
pass.components = 4;
pass.exposure = true;
pass.divide_type = PASS_SUBSURFACE_COLOR;
break;
case PASS_EMISSION:
pass.components = 4;
pass.exposure = true;
break;
case PASS_BACKGROUND:
pass.components = 4;
pass.exposure = true;
break;
case PASS_AO:
pass.components = 4;
break;
case PASS_SHADOW:
pass.components = 4;
pass.exposure = false;
break;
case PASS_LIGHT:
/* ignores */
break;
}
passes.push_back(pass);
/* order from by components, to ensure alignment so passes with size 4
* come first and then passes with size 1 */
sort(passes.begin(), passes.end(), compare_pass_order);
if(pass.divide_type != PASS_NONE)
Pass::add(pass.divide_type, passes);
}
bool Pass::equals(const vector<Pass>& A, const vector<Pass>& B)
{
if(A.size() != B.size())
return false;
for(int i = 0; i < A.size(); i++)
if(A[i].type != B[i].type)
return false;
return true;
}
bool Pass::contains(const vector<Pass>& passes, PassType type)
{
foreach(const Pass& pass, passes)
if(pass.type == type)
return true;
return false;
}
/* Pixel Filter */
static float filter_func_box(float v, float width)
{
return 1.0f;
}
static float filter_func_gaussian(float v, float width)
{
v *= 2.0f/width;
return expf(-2.0f*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;
}
/* Film */
Film::Film()
{
exposure = 0.8f;
Pass::add(PASS_COMBINED, passes);
pass_alpha_threshold = 0.5f;
filter_type = FILTER_BOX;
filter_width = 1.0f;
filter_table_offset = TABLE_OFFSET_INVALID;
mist_start = 0.0f;
mist_depth = 100.0f;
mist_falloff = 1.0f;
use_light_visibility = false;
use_sample_clamp = false;
need_update = true;
}
Film::~Film()
{
}
void Film::device_update(Device *device, DeviceScene *dscene, Scene *scene)
{
if(!need_update)
return;
device_free(device, dscene, scene);
KernelFilm *kfilm = &dscene->data.film;
/* update __data */
kfilm->exposure = exposure;
kfilm->pass_flag = 0;
kfilm->pass_stride = 0;
kfilm->use_light_pass = use_light_visibility || use_sample_clamp;
foreach(Pass& pass, passes) {
kfilm->pass_flag |= pass.type;
switch(pass.type) {
case PASS_COMBINED:
kfilm->pass_combined = kfilm->pass_stride;
break;
case PASS_DEPTH:
kfilm->pass_depth = kfilm->pass_stride;
break;
case PASS_MIST:
kfilm->pass_mist = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_NORMAL:
kfilm->pass_normal = kfilm->pass_stride;
break;
case PASS_UV:
kfilm->pass_uv = kfilm->pass_stride;
break;
case PASS_MOTION:
kfilm->pass_motion = kfilm->pass_stride;
break;
case PASS_MOTION_WEIGHT:
kfilm->pass_motion_weight = kfilm->pass_stride;
break;
case PASS_OBJECT_ID:
kfilm->pass_object_id = kfilm->pass_stride;
break;
case PASS_MATERIAL_ID:
kfilm->pass_material_id = kfilm->pass_stride;
break;
case PASS_DIFFUSE_COLOR:
kfilm->pass_diffuse_color = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_GLOSSY_COLOR:
kfilm->pass_glossy_color = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_TRANSMISSION_COLOR:
kfilm->pass_transmission_color = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_SUBSURFACE_COLOR:
kfilm->pass_subsurface_color = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_DIFFUSE_INDIRECT:
kfilm->pass_diffuse_indirect = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_GLOSSY_INDIRECT:
kfilm->pass_glossy_indirect = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_TRANSMISSION_INDIRECT:
kfilm->pass_transmission_indirect = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_SUBSURFACE_INDIRECT:
kfilm->pass_subsurface_indirect = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_DIFFUSE_DIRECT:
kfilm->pass_diffuse_direct = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_GLOSSY_DIRECT:
kfilm->pass_glossy_direct = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_TRANSMISSION_DIRECT:
kfilm->pass_transmission_direct = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_SUBSURFACE_DIRECT:
kfilm->pass_subsurface_direct = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_EMISSION:
kfilm->pass_emission = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_BACKGROUND:
kfilm->pass_background = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_AO:
kfilm->pass_ao = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_SHADOW:
kfilm->pass_shadow = kfilm->pass_stride;
kfilm->use_light_pass = 1;
break;
case PASS_LIGHT:
kfilm->use_light_pass = 1;
break;
case PASS_NONE:
break;
}
kfilm->pass_stride += pass.components;
}
kfilm->pass_stride = align_up(kfilm->pass_stride, 4);
kfilm->pass_alpha_threshold = pass_alpha_threshold;
/* update filter table */
vector<float> table = filter_table(filter_type, filter_width);
filter_table_offset = scene->lookup_tables->add_table(dscene, table);
kfilm->filter_table_offset = (int)filter_table_offset;
/* mist pass parameters */
kfilm->mist_start = mist_start;
kfilm->mist_inv_depth = (mist_depth > 0.0f)? 1.0f/mist_depth: 0.0f;
kfilm->mist_falloff = mist_falloff;
need_update = false;
}
void Film::device_free(Device *device, DeviceScene *dscene, Scene *scene)
{
if(filter_table_offset != TABLE_OFFSET_INVALID) {
scene->lookup_tables->remove_table(filter_table_offset);
filter_table_offset = TABLE_OFFSET_INVALID;
}
}
bool Film::modified(const Film& film)
{
return !(exposure == film.exposure
&& Pass::equals(passes, film.passes)
&& pass_alpha_threshold == film.pass_alpha_threshold
&& use_sample_clamp == film.use_sample_clamp
&& filter_type == film.filter_type
&& filter_width == film.filter_width
&& mist_start == film.mist_start
&& mist_depth == film.mist_depth
&& mist_falloff == film.mist_falloff);
}
void Film::tag_passes_update(Scene *scene, const vector<Pass>& passes_)
{
if(Pass::contains(passes, PASS_UV) != Pass::contains(passes_, PASS_UV)) {
scene->mesh_manager->tag_update(scene);
foreach(Shader *shader, scene->shaders)
shader->need_update_attributes = true;
}
else if(Pass::contains(passes, PASS_MOTION) != Pass::contains(passes_, PASS_MOTION))
scene->mesh_manager->tag_update(scene);
passes = passes_;
}
void Film::tag_update(Scene *scene)
{
need_update = true;
}
CCL_NAMESPACE_END
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