Differential D2089 Diff 7087 intern/cycles/render/constant_fold.cpp

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intern/cycles/render/constant_fold.cpp

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				/*
				* Copyright 2011-2013 Blender Foundation
				*
				dingtoUnsubmitted Not Done Inline Actions Same as above. dingto: Same as above.
				* 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.
				*/

				#include "constant_fold.h"
				#include "graph.h"

				#include "util_foreach.h"

				CCL_NAMESPACE_BEGIN

				ConstantFolder::ConstantFolder(ShaderGraph graph, ShaderNode node, ShaderOutput *output)
				: graph(graph), node(node), output(output)
				dingtoUnsubmitted Not Done Inline Actions Too many includes, don't think we need half of them. dingto: Too many includes, don't think we need half of them.
				{
				}

				bool ConstantFolder::all_inputs_constant() const
				{
				foreach(ShaderInput *input, node->inputs) {
				if(input->link) {
				return false;
				}
				}

				return true;
				}

				void ConstantFolder::make_constant(float value) const
				{
				foreach(ShaderInput *sock, output->links) {
				sock->set(value);
				}

				graph->disconnect(output);
				}

				void ConstantFolder::make_constant(float3 value) const
				{
				foreach(ShaderInput *sock, output->links) {
				sock->set(value);
				}

				graph->disconnect(output);
				}

				void ConstantFolder::make_constant_clamp(float value, bool clamp) const
				{
				make_constant(clamp ? saturate(value) : value);
				}

				void ConstantFolder::make_constant_clamp(float3 value, bool clamp) const
				{
				if (clamp) {
				value.x = saturate(value.x);
				value.y = saturate(value.y);
				value.z = saturate(value.z);
				}

				make_constant(value);
				}

				void ConstantFolder::bypass(ShaderOutput *new_output) const
				{
				assert(new_output);

				/* Remove all outgoing links from socket and connect them to new_output instead.
				* The graph->relink method affects node inputs, so it's not safe to use in constant
				* folding if the node has multiple outputs and will thus be folded multiple times. */
				vector<ShaderInput*> outputs = output->links;

				graph->disconnect(output);

				foreach(ShaderInput *sock, outputs) {
				graph->connect(new_output, sock);
				}
				}

				void ConstantFolder::discard() const
				{
				assert(output->type() == SocketType::CLOSURE);
				graph->disconnect(output);
				}

				void ConstantFolder::bypass_or_discard(ShaderInput *input) const
				{
				assert(input->type() == SocketType::CLOSURE);

				if (input->link) {
				bypass(input->link);
				}
				else {
				discard();
				}
				}

				bool ConstantFolder::try_bypass_or_make_constant(ShaderInput *input, float3 input_value, bool clamp) const
				{
				if(!input->link) {
				make_constant_clamp(input_value, clamp);
				return true;
				}
				else if(!clamp) {
				bypass(input->link);
				return true;
				}

				return false;
				}

				CCL_NAMESPACE_END