initial commit, 4.5 stable

servers/rendering/renderer_rd/effects/smaa.h

@@ -0,0 +1,121 @@
+/**************************************************************************/
+/*  smaa.h                                                                */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "servers/rendering/renderer_rd/pipeline_cache_rd.h"
+#include "servers/rendering/renderer_rd/shaders/effects/smaa_blending.glsl.gen.h"
+#include "servers/rendering/renderer_rd/shaders/effects/smaa_edge_detection.glsl.gen.h"
+#include "servers/rendering/renderer_rd/shaders/effects/smaa_weight_calculation.glsl.gen.h"
+#include "servers/rendering/renderer_rd/storage_rd/render_scene_buffers_rd.h"
+#include "servers/rendering/renderer_scene_render.h"
+
+#include "servers/rendering_server.h"
+
+#define RB_SCOPE_SMAA SNAME("rb_smaa")
+
+#define RB_EDGES SNAME("edges")
+#define RB_BLEND SNAME("blend")
+#define RB_STENCIL SNAME("stencil")
+
+namespace RendererRD {
+
+class SMAA {
+private:
+	enum SMAAMode {
+		SMAA_EDGE_DETECTION_COLOR,
+		SMAA_WEIGHT_FULL,
+		SMAA_BLENDING,
+		SMAA_MAX,
+	};
+
+	struct SMAAEdgePushConstant {
+		float inv_size[2];
+		float threshold;
+		float pad;
+	};
+
+	struct SMAAWeightPushConstant {
+		float inv_size[2];
+		uint32_t size[2];
+
+		float subsample_indices[4];
+	};
+
+	struct SMAABlendPushConstant {
+		float inv_size[2];
+		uint32_t flags;
+		float pad;
+	};
+
+	enum SMAABlendFlags {
+		SMAA_BLEND_FLAG_USE_8_BIT_DEBANDING = (1 << 0),
+		SMAA_BLEND_FLAG_USE_10_BIT_DEBANDING = (1 << 1),
+	};
+
+	struct SMAAEffect {
+		SMAAEdgePushConstant edge_push_constant;
+		SmaaEdgeDetectionShaderRD edge_shader;
+		RID edge_shader_version;
+
+		SMAAWeightPushConstant weight_push_constant;
+		SmaaWeightCalculationShaderRD weight_shader;
+		RID weight_shader_version;
+
+		SMAABlendPushConstant blend_push_constant;
+		SmaaBlendingShaderRD blend_shader;
+		RID blend_shader_version;
+
+		RID search_tex;
+		RID area_tex;
+
+		RD::DataFormat stencil_format;
+
+		PipelineCacheRD pipelines[SMAA_MAX];
+	} smaa;
+
+	float edge_detection_threshold;
+
+public:
+	SMAA();
+	~SMAA();
+
+	void allocate_render_targets(Ref<RenderSceneBuffersRD> p_render_buffers);
+	void process(Ref<RenderSceneBuffersRD> p_render_buffers, RID p_source_color, RID p_dst_framebuffer);
+
+	enum DebandingMode {
+		DEBANDING_MODE_DISABLED,
+		DEBANDING_MODE_8_BIT,
+		DEBANDING_MODE_10_BIT,
+	};
+	DebandingMode debanding_mode = DEBANDING_MODE_DISABLED;
+};
+
+} // namespace RendererRD