mirror of
https://github.com/blender/blender
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2c4477de04
A series of commits which reduces the number of sign conversions (int <-> uint) in the Cycles kernel. While it is not expected that the conversion emits any instructions, it is quite confusing to follow the code and choose proper type. Additionally, from some development in !151540 it seemed that such mismatch was responsible for the performance drop in HIP-RT. Pull Request: https://projects.blender.org/blender/blender/pulls/152009
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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#include "kernel/integrator/state_flow.h"
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CCL_NAMESPACE_BEGIN
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/* Check whether current surface bounce is where path is to be split for the shadow catcher. */
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ccl_device_inline bool kernel_shadow_catcher_is_path_split_bounce(KernelGlobals kg,
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IntegratorState state,
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const uint object_flag)
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{
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#ifdef __SHADOW_CATCHER__
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if (!kernel_data.integrator.has_shadow_catcher) {
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return false;
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}
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/* Check the flag first, avoiding fetches form global memory. */
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if ((object_flag & SD_OBJECT_SHADOW_CATCHER) == 0) {
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return false;
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}
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if (object_flag & SD_OBJECT_HOLDOUT_MASK) {
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return false;
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}
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const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);
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if ((path_flag & PATH_RAY_TRANSPARENT_BACKGROUND) == 0) {
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/* Split only on primary rays, secondary bounces are to treat shadow catcher as a regular
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* object. */
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return false;
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}
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if (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) {
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return false;
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}
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return true;
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#else
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(void)object_flag;
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return false;
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#endif
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}
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/* Check whether the current path can still split. */
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ccl_device_inline bool kernel_shadow_catcher_path_can_split(ConstIntegratorState state)
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{
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if (integrator_path_is_terminated(state)) {
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return false;
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}
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const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);
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if (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) {
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/* Shadow catcher was already hit and the state was split. No further split is allowed. */
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return false;
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}
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return (path_flag & PATH_RAY_TRANSPARENT_BACKGROUND) != 0;
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}
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#ifdef __SHADOW_CATCHER__
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ccl_device_forceinline bool kernel_shadow_catcher_is_matte_path(const uint32_t path_flag)
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{
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return (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) == 0;
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}
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ccl_device_forceinline bool kernel_shadow_catcher_is_object_pass(const uint32_t path_flag)
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{
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return path_flag & PATH_RAY_SHADOW_CATCHER_PASS;
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}
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#endif /* __SHADOW_CATCHER__ */
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CCL_NAMESPACE_END
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