1 files changed, 61 insertions, 0 deletions
diff --git a/intern/cycles/integrator/shader_eval.h b/intern/cycles/integrator/shader_eval.h
new file mode 100644
index 00000000000..7dbf334b8d7
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+++ b/intern/cycles/integrator/shader_eval.h
@@ -0,0 +1,61 @@
+/*
+ * 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,
+};
+
+/* 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_points,
+            const function<int(device_vector<KernelShaderEvalInput> &)> &fill_input,
+            const function<void(device_vector<float4> &)> &read_output);
+
+ protected:
+  bool eval_cpu(Device *device,
+                const ShaderEvalType type,
+                device_vector<KernelShaderEvalInput> &input,
+                device_vector<float4> &output);
+  bool eval_gpu(Device *device,
+                const ShaderEvalType type,
+                device_vector<KernelShaderEvalInput> &input,
+                device_vector<float4> &output);
+
+  Device *device_;
+  Progress &progress_;
+};
+
+CCL_NAMESPACE_END