Differential D16279 Diff 56892 source/blender/nodes/composite/nodes/node_composite_normalize.cc

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source/blender/nodes/composite/nodes/node_composite_normalize.cc

	/* SPDX-License-Identifier: GPL-2.0-or-later			/* SPDX-License-Identifier: GPL-2.0-or-later
	* Copyright 2006 Blender Foundation. All rights reserved. */			* Copyright 2006 Blender Foundation. All rights reserved. */

	/** \file			/** \file
	* \ingroup cmpnodes			* \ingroup cmpnodes
	*/			*/

				#include "COM_algorithm_parallel_reduction.hh"
	#include "COM_node_operation.hh"			#include "COM_node_operation.hh"
				#include "COM_utilities.hh"

	#include "node_composite_util.hh"			#include "node_composite_util.hh"

	/* ************** NORMALIZE single channel, useful for Z buffer ****************** */			/* ************** NORMALIZE single channel, useful for Z buffer ****************** */

	namespace blender::nodes::node_composite_normalize_cc {			namespace blender::nodes::node_composite_normalize_cc {

	static void cmp_node_normalize_declare(NodeDeclarationBuilder &b)			static void cmp_node_normalize_declare(NodeDeclarationBuilder &b)
	{			{
	b.add_input<decl::Float>(N_("Value")).default_value(1.0f).min(0.0f).max(1.0f);			b.add_input<decl::Float>(N_("Value"))
				.default_value(1.0f)
				.min(0.0f)
				.max(1.0f)
				.compositor_domain_priority(0);
	b.add_output<decl::Float>(N_("Value"));			b.add_output<decl::Float>(N_("Value"));
	}			}

	using namespace blender::realtime_compositor;			using namespace blender::realtime_compositor;

	class NormalizeOperation : public NodeOperation {			class NormalizeOperation : public NodeOperation {
				private:
				/* The normalize operation is specifically designed to normalize Z Depth information. But since Z
				* Depth can contain near infinite values, normalization is limited to [-range_, range], meaning
				* that values outside of that range will be ignored when computing the maximum and minimum for
				* normalization and will eventually be 0 or 1 if they are less than or larger than the range
				* respectively. */
				constexpr static float range_ = 10000.0f;

	public:			public:
	using NodeOperation::NodeOperation;			using NodeOperation::NodeOperation;

	void execute() override			void execute() override
	{			{
				const Result &input_image = get_input("Value");
				if (input_image.is_single_value()) {
	get_input("Value").pass_through(get_result("Value"));			get_input("Value").pass_through(get_result("Value"));
				return;
				}

				const float maximum = maximum_float_in_range(
				context(), input_image.texture(), -range_, range_);
				const float minimum = minimum_float_in_range(
				context(), input_image.texture(), -range_, range_);
				const float scale = (maximum != minimum) ? (1.0f / (maximum - minimum)) : 0.0f;

				GPUShader *shader = shader_manager().get("compositor_normalize");
				GPU_shader_bind(shader);

				GPU_shader_uniform_1f(shader, "minimum", minimum);
				GPU_shader_uniform_1f(shader, "scale", scale);

				input_image.bind_as_texture(shader, "input_tx");

				Result &output_image = get_result("Value");
				const Domain domain = compute_domain();
				output_image.allocate_texture(domain);
				output_image.bind_as_image(shader, "output_img");

				compute_dispatch_threads_at_least(shader, domain.size);

				GPU_shader_unbind();
				output_image.unbind_as_image();
				input_image.unbind_as_texture();
	}			}
	};			};

	static NodeOperation *get_compositor_operation(Context &context, DNode node)			static NodeOperation *get_compositor_operation(Context &context, DNode node)
	{			{
	return new NormalizeOperation(context, node);			return new NormalizeOperation(context, node);
	}			}

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