Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
|
|
* Copyright 2011-2022 Blender Foundation */
|
|
|
|
#pragma once
|
|
|
|
#include "kernel/camera/camera.h"
|
|
|
|
#include "kernel/film/accumulate.h"
|
|
#include "kernel/film/adaptive_sampling.h"
|
|
|
|
#include "kernel/integrator/path_state.h"
|
|
#include "kernel/integrator/shadow_catcher.h"
|
|
|
|
#include "kernel/sample/pattern.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
ccl_device_inline void integrate_camera_sample(KernelGlobals kg,
|
|
const int sample,
|
|
const int x,
|
|
const int y,
|
|
const uint rng_hash,
|
|
ccl_private Ray *ray)
|
|
{
|
|
/* Filter sampling. */
|
|
float filter_u, filter_v;
|
|
|
|
if (sample == 0) {
|
|
filter_u = 0.5f;
|
|
filter_v = 0.5f;
|
|
}
|
|
else {
|
|
path_rng_2D(kg, rng_hash, sample, PRNG_FILTER_U, &filter_u, &filter_v);
|
|
}
|
|
|
|
/* Depth of field sampling. */
|
|
float lens_u = 0.0f, lens_v = 0.0f;
|
|
if (kernel_data.cam.aperturesize > 0.0f) {
|
|
path_rng_2D(kg, rng_hash, sample, PRNG_LENS_U, &lens_u, &lens_v);
|
|
}
|
|
|
|
/* Motion blur time sampling. */
|
|
float time = 0.0f;
|
|
#ifdef __CAMERA_MOTION__
|
|
if (kernel_data.cam.shuttertime != -1.0f)
|
|
time = path_rng_1D(kg, rng_hash, sample, PRNG_TIME);
|
|
#endif
|
|
|
|
/* Generate camera ray. */
|
|
camera_sample(kg, x, y, filter_u, filter_v, lens_u, lens_v, time, ray);
|
|
}
|
|
|
|
/* Return false to indicate that this pixel is finished.
|
|
* Used by CPU implementation to not attempt to sample pixel for multiple samples once its known
|
|
* that the pixel did converge. */
|
|
ccl_device bool integrator_init_from_camera(KernelGlobals kg,
|
|
IntegratorState state,
|
|
ccl_global const KernelWorkTile *ccl_restrict tile,
|
|
ccl_global float *render_buffer,
|
|
const int x,
|
|
const int y,
|
|
const int scheduled_sample)
|
|
{
|
|
PROFILING_INIT(kg, PROFILING_RAY_SETUP);
|
|
|
|
/* Initialize path state to give basic buffer access and allow early outputs. */
|
|
path_state_init(state, tile, x, y);
|
|
|
|
/* Check whether the pixel has converged and should not be sampled anymore. */
|
|
if (!kernel_need_sample_pixel(kg, state, render_buffer)) {
|
|
return false;
|
|
}
|
|
|
|
/* Count the sample and get an effective sample for this pixel.
|
|
*
|
|
* This logic allows to both count actual number of samples per pixel, and to add samples to this
|
|
* pixel after it was converged and samples were added somewhere else (in which case the
|
|
* `scheduled_sample` will be different from actual number of samples in this pixel). */
|
|
const int sample = kernel_accum_sample(
|
|
kg, state, render_buffer, scheduled_sample, tile->sample_offset);
|
|
|
|
/* Initialize random number seed for path. */
|
|
const uint rng_hash = path_rng_hash_init(kg, sample, x, y);
|
|
|
|
{
|
|
/* Generate camera ray. */
|
|
Ray ray;
|
|
integrate_camera_sample(kg, sample, x, y, rng_hash, &ray);
|
|
if (ray.t == 0.0f) {
|
|
return true;
|
|
}
|
|
|
|
/* Write camera ray to state. */
|
|
integrator_state_write_ray(kg, state, &ray);
|
|
}
|
|
|
|
/* Initialize path state for path integration. */
|
|
path_state_init_integrator(kg, state, sample, rng_hash);
|
|
|
|
/* Continue with intersect_closest kernel, optionally initializing volume
|
|
* stack before that if the camera may be inside a volume. */
|
|
if (kernel_data.cam.is_inside_volume) {
|
|
INTEGRATOR_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_VOLUME_STACK);
|
|
}
|
|
else {
|
|
INTEGRATOR_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|