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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.
*/
CCL_NAMESPACE_BEGIN
ccl_device_inline void kernel_write_pass_float(ccl_global float *buffer, int sample, float value)
{
ccl_global float *buf = buffer;
#if defined(__SPLIT_KERNEL__) && defined(__WORK_STEALING__)
atomic_add_float(buf, value);
#else
*buf = (sample == 0)? value: *buf + value;
#endif // __SPLIT_KERNEL__ && __WORK_STEALING__
}
ccl_device_inline void kernel_write_pass_float3(ccl_global float *buffer, int sample, float3 value)
{
#if defined(__SPLIT_KERNEL__) && defined(__WORK_STEALING__)
ccl_global float *buf_x = buffer + 0;
ccl_global float *buf_y = buffer + 1;
ccl_global float *buf_z = buffer + 2;
atomic_add_float(buf_x, value.x);
atomic_add_float(buf_y, value.y);
atomic_add_float(buf_z, value.z);
#else
ccl_global float3 *buf = (ccl_global float3*)buffer;
*buf = (sample == 0)? value: *buf + value;
#endif // __SPLIT_KERNEL__ && __WORK_STEALING__
}
ccl_device_inline void kernel_write_pass_float4(ccl_global float *buffer, int sample, float4 value)
{
#if defined(__SPLIT_KERNEL__) && defined(__WORK_STEALING__)
ccl_global float *buf_x = buffer + 0;
ccl_global float *buf_y = buffer + 1;
ccl_global float *buf_z = buffer + 2;
ccl_global float *buf_w = buffer + 3;
atomic_add_float(buf_x, value.x);
atomic_add_float(buf_y, value.y);
atomic_add_float(buf_z, value.z);
atomic_add_float(buf_w, value.w);
#else
ccl_global float4 *buf = (ccl_global float4*)buffer;
*buf = (sample == 0)? value: *buf + value;
#endif // __SPLIT_KERNEL__ && __WORK_STEALING__
}
ccl_device_inline void kernel_write_data_passes(KernelGlobals *kg, ccl_global float *buffer, PathRadiance *L,
ShaderData *sd, int sample, ccl_addr_space PathState *state, float3 throughput)
{
#ifdef __PASSES__
int path_flag = state->flag;
if(!(path_flag & PATH_RAY_CAMERA))
return;
int flag = kernel_data.film.pass_flag;
if(!(flag & PASS_ALL))
return;
if(!(path_flag & PATH_RAY_SINGLE_PASS_DONE)) {
if(!(ccl_fetch(sd, flag) & SD_TRANSPARENT) ||
kernel_data.film.pass_alpha_threshold == 0.0f ||
average(shader_bsdf_alpha(kg, sd)) >= kernel_data.film.pass_alpha_threshold)
{
if(sample == 0) {
if(flag & PASS_DEPTH) {
float depth = camera_distance(kg, ccl_fetch(sd, P));
kernel_write_pass_float(buffer + kernel_data.film.pass_depth, sample, depth);
}
if(flag & PASS_OBJECT_ID) {
float id = object_pass_id(kg, ccl_fetch(sd, object));
kernel_write_pass_float(buffer + kernel_data.film.pass_object_id, sample, id);
}
if(flag & PASS_MATERIAL_ID) {
float id = shader_pass_id(kg, sd);
kernel_write_pass_float(buffer + kernel_data.film.pass_material_id, sample, id);
}
}
if(flag & PASS_NORMAL) {
float3 normal = ccl_fetch(sd, N);
kernel_write_pass_float3(buffer + kernel_data.film.pass_normal, sample, normal);
}
if(flag & PASS_UV) {
float3 uv = primitive_uv(kg, sd);
kernel_write_pass_float3(buffer + kernel_data.film.pass_uv, sample, uv);
}
if(flag & PASS_MOTION) {
float4 speed = primitive_motion_vector(kg, sd);
kernel_write_pass_float4(buffer + kernel_data.film.pass_motion, sample, speed);
kernel_write_pass_float(buffer + kernel_data.film.pass_motion_weight, sample, 1.0f);
}
state->flag |= PATH_RAY_SINGLE_PASS_DONE;
}
}
if(flag & (PASS_DIFFUSE_INDIRECT|PASS_DIFFUSE_COLOR|PASS_DIFFUSE_DIRECT))
L->color_diffuse += shader_bsdf_diffuse(kg, sd)*throughput;
if(flag & (PASS_GLOSSY_INDIRECT|PASS_GLOSSY_COLOR|PASS_GLOSSY_DIRECT))
L->color_glossy += shader_bsdf_glossy(kg, sd)*throughput;
if(flag & (PASS_TRANSMISSION_INDIRECT|PASS_TRANSMISSION_COLOR|PASS_TRANSMISSION_DIRECT))
L->color_transmission += shader_bsdf_transmission(kg, sd)*throughput;
if(flag & (PASS_SUBSURFACE_INDIRECT|PASS_SUBSURFACE_COLOR|PASS_SUBSURFACE_DIRECT))
L->color_subsurface += shader_bsdf_subsurface(kg, sd)*throughput;
if(flag & PASS_MIST) {
/* bring depth into 0..1 range */
float mist_start = kernel_data.film.mist_start;
float mist_inv_depth = kernel_data.film.mist_inv_depth;
float depth = camera_distance(kg, ccl_fetch(sd, P));
float mist = saturate((depth - mist_start)*mist_inv_depth);
/* falloff */
float mist_falloff = kernel_data.film.mist_falloff;
if(mist_falloff == 1.0f)
;
else if(mist_falloff == 2.0f)
mist = mist*mist;
else if(mist_falloff == 0.5f)
mist = sqrtf(mist);
else
mist = powf(mist, mist_falloff);
/* modulate by transparency */
float3 alpha = shader_bsdf_alpha(kg, sd);
L->mist += (1.0f - mist)*average(throughput*alpha);
}
#endif
}
ccl_device_inline void kernel_write_light_passes(KernelGlobals *kg, ccl_global float *buffer, PathRadiance *L, int sample)
{
#ifdef __PASSES__
int flag = kernel_data.film.pass_flag;
if(!kernel_data.film.use_light_pass)
return;
if(flag & PASS_DIFFUSE_INDIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_diffuse_indirect, sample, L->indirect_diffuse);
if(flag & PASS_GLOSSY_INDIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_glossy_indirect, sample, L->indirect_glossy);
if(flag & PASS_TRANSMISSION_INDIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_transmission_indirect, sample, L->indirect_transmission);
if(flag & PASS_SUBSURFACE_INDIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_subsurface_indirect, sample, L->indirect_subsurface);
if(flag & PASS_DIFFUSE_DIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_diffuse_direct, sample, L->direct_diffuse);
if(flag & PASS_GLOSSY_DIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_glossy_direct, sample, L->direct_glossy);
if(flag & PASS_TRANSMISSION_DIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_transmission_direct, sample, L->direct_transmission);
if(flag & PASS_SUBSURFACE_DIRECT)
kernel_write_pass_float3(buffer + kernel_data.film.pass_subsurface_direct, sample, L->direct_subsurface);
if(flag & PASS_EMISSION)
kernel_write_pass_float3(buffer + kernel_data.film.pass_emission, sample, L->emission);
if(flag & PASS_BACKGROUND)
kernel_write_pass_float3(buffer + kernel_data.film.pass_background, sample, L->background);
if(flag & PASS_AO)
kernel_write_pass_float3(buffer + kernel_data.film.pass_ao, sample, L->ao);
if(flag & PASS_DIFFUSE_COLOR)
kernel_write_pass_float3(buffer + kernel_data.film.pass_diffuse_color, sample, L->color_diffuse);
if(flag & PASS_GLOSSY_COLOR)
kernel_write_pass_float3(buffer + kernel_data.film.pass_glossy_color, sample, L->color_glossy);
if(flag & PASS_TRANSMISSION_COLOR)
kernel_write_pass_float3(buffer + kernel_data.film.pass_transmission_color, sample, L->color_transmission);
if(flag & PASS_SUBSURFACE_COLOR)
kernel_write_pass_float3(buffer + kernel_data.film.pass_subsurface_color, sample, L->color_subsurface);
if(flag & PASS_SHADOW) {
float4 shadow = L->shadow;
shadow.w = kernel_data.film.pass_shadow_scale;
kernel_write_pass_float4(buffer + kernel_data.film.pass_shadow, sample, shadow);
}
if(flag & PASS_MIST)
kernel_write_pass_float(buffer + kernel_data.film.pass_mist, sample, 1.0f - L->mist);
#endif
}
CCL_NAMESPACE_END
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