shader_eval.h

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/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
#pragma once
 
#include <functional>
 
#include "device/memory.h"
 
#include "kernel/types.h"
 
CCL_NAMESPACE_BEGIN
 
class Device;
class Progress;
 
enum ShaderEvalType {
  SHADER_EVAL_DISPLACE,
  SHADER_EVAL_BACKGROUND,
  SHADER_EVAL_CURVE_SHADOW_TRANSPARENCY,
  SHADER_EVAL_VOLUME_DENSITY,
};
 
/* 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 std::function<int(device_vector<KernelShaderEvalInput> &)> &fill_input,
            const std::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