Michael Jones (Apple)
a0f269f682
This is the first of a sequence of changes to support compiling Cycles kernels as MSL (Metal Shading Language) in preparation for a Metal GPU device implementation. MSL requires that all pointer types be declared with explicit address space attributes (device, thread, etc...). There is already precedent for this with Cycles' address space macros (ccl_global, ccl_private, etc...), therefore the first step of MSL-enablement is to apply these consistently. Line-for-line this represents the largest change required to enable MSL. Applying this change first will simplify future patches as well as offering the emergent benefit of enhanced descriptiveness. The vast majority of deltas in this patch fall into one of two cases: - Ensuring ccl_private is specified for thread-local pointer types - Ensuring ccl_global is specified for device-wide pointer types Additionally, the ccl_addr_space qualifier can be removed. Prior to Cycles X, ccl_addr_space was used as a context-dependent address space qualifier, but now it is either redundant (e.g. in struct typedefs), or can be replaced by ccl_global in the case of pointer types. Associated function variants (e.g. lcg_step_float_addrspace) are also redundant. In cases where address space qualifiers are chained with "const", this patch places the address space qualifier first. The rationale for this is that the choice of address space is likely to have the greater impact on runtime performance and overall architecture. The final part of this patch is the addition of a metal/compat.h header. This is partially complete and will be extended in future patches, paving the way for the full Metal implementation. Ref T92212 Reviewed By: brecht Maniphest Tasks: T92212 Differential Revision: https://developer.blender.org/D12864
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "kernel/kernel_differential.h"
|
|
#include "kernel/kernel_projection.h"
|
|
#include "kernel/kernel_shader.h"
|
|
|
|
#include "kernel/geom/geom.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
ccl_device void kernel_displace_evaluate(ccl_global const KernelGlobals *kg,
|
|
ccl_global const KernelShaderEvalInput *input,
|
|
ccl_global float4 *output,
|
|
const int offset)
|
|
{
|
|
/* Setup shader data. */
|
|
const KernelShaderEvalInput in = input[offset];
|
|
|
|
ShaderData sd;
|
|
shader_setup_from_displace(kg, &sd, in.object, in.prim, in.u, in.v);
|
|
|
|
/* Evaluate displacement shader. */
|
|
const float3 P = sd.P;
|
|
shader_eval_displacement(INTEGRATOR_STATE_PASS_NULL, &sd);
|
|
float3 D = sd.P - P;
|
|
|
|
object_inverse_dir_transform(kg, &sd, &D);
|
|
|
|
#ifdef __KERNEL_DEBUG_NAN__
|
|
if (!isfinite3_safe(D)) {
|
|
kernel_assert(!"Cycles displacement with non-finite value detected");
|
|
}
|
|
#endif
|
|
|
|
/* Ensure finite displacement, preventing BVH from becoming degenerate and avoiding possible
|
|
* traversal issues caused by non-finite math. */
|
|
D = ensure_finite3(D);
|
|
|
|
/* Write output. */
|
|
output[offset] += make_float4(D.x, D.y, D.z, 0.0f);
|
|
}
|
|
|
|
ccl_device void kernel_background_evaluate(ccl_global const KernelGlobals *kg,
|
|
ccl_global const KernelShaderEvalInput *input,
|
|
ccl_global float4 *output,
|
|
const int offset)
|
|
{
|
|
/* Setup ray */
|
|
const KernelShaderEvalInput in = input[offset];
|
|
const float3 ray_P = zero_float3();
|
|
const float3 ray_D = equirectangular_to_direction(in.u, in.v);
|
|
const float ray_time = 0.5f;
|
|
|
|
/* Setup shader data. */
|
|
ShaderData sd;
|
|
shader_setup_from_background(kg, &sd, ray_P, ray_D, ray_time);
|
|
|
|
/* Evaluate shader.
|
|
* This is being evaluated for all BSDFs, so path flag does not contain a specific type. */
|
|
const int path_flag = PATH_RAY_EMISSION;
|
|
shader_eval_surface<KERNEL_FEATURE_NODE_MASK_SURFACE_LIGHT>(
|
|
INTEGRATOR_STATE_PASS_NULL, &sd, NULL, path_flag);
|
|
float3 color = shader_background_eval(&sd);
|
|
|
|
#ifdef __KERNEL_DEBUG_NAN__
|
|
if (!isfinite3_safe(color)) {
|
|
kernel_assert(!"Cycles background with non-finite value detected");
|
|
}
|
|
#endif
|
|
|
|
/* Ensure finite color, avoiding possible numerical instabilities in the path tracing kernels. */
|
|
color = ensure_finite3(color);
|
|
|
|
/* Write output. */
|
|
output[offset] += make_float4(color.x, color.y, color.z, 0.0f);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|