fd77a28031
These transparent shadows can be expansive to evaluate. Especially on the GPU they can lead to poor occupancy when only some pixels require many kernel launches to trace and evaluate many layers of transparency. Baked transparency allows tracing a single ray in many cases by accumulating the throughput directly in the intersection program without recording hits or evaluating shaders. Transparency is baked at curve vertices and interpolated, for most shaders this will look practically the same as actual shader evaluation. Fixes T91428, performance regression with spring demo file due to transparent hair, and makes it render significantly faster than Blender 2.93. Differential Revision: https://developer.blender.org/D12880
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*
|
|
* Copyright 2011-2021 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 "device/device_memory.h"
|
|
|
|
#include "kernel/kernel_types.h"
|
|
|
|
#include "util/util_function.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
class Device;
|
|
class Progress;
|
|
|
|
enum ShaderEvalType {
|
|
SHADER_EVAL_DISPLACE,
|
|
SHADER_EVAL_BACKGROUND,
|
|
SHADER_EVAL_CURVE_SHADOW_TRANSPARENCY,
|
|
};
|
|
|
|
/* ShaderEval class performs shader evaluation for background light and displacement. */
|
|
class ShaderEval {
|
|
public:
|
|
ShaderEval(Device *device, Progress &progress);
|
|
|
|
/* Evaluate shader at points specified by KernelShaderEvalInput and write out
|
|
* RGBA colors to output. */
|
|
bool eval(const ShaderEvalType type,
|
|
const int max_num_inputs,
|
|
const int num_channels,
|
|
const function<int(device_vector<KernelShaderEvalInput> &)> &fill_input,
|
|
const function<void(device_vector<float> &)> &read_output);
|
|
|
|
protected:
|
|
bool eval_cpu(Device *device,
|
|
const ShaderEvalType type,
|
|
device_vector<KernelShaderEvalInput> &input,
|
|
device_vector<float> &output,
|
|
const int64_t work_size);
|
|
bool eval_gpu(Device *device,
|
|
const ShaderEvalType type,
|
|
device_vector<KernelShaderEvalInput> &input,
|
|
device_vector<float> &output,
|
|
const int64_t work_size);
|
|
|
|
Device *device_;
|
|
Progress &progress_;
|
|
};
|
|
|
|
CCL_NAMESPACE_END
|