Merge pull request #37861 from reduz/implement-decals

Implement decals

1 files changed, 155 insertions, 0 deletions

diff --git a/servers/rendering/rasterizer_rd/rasterizer_storage_rd.h b/servers/rendering/rasterizer_rd/rasterizer_storage_rd.h
index 29a45ca90e..e8ee135f2b 100644
--- a/servers/rendering/rasterizer_rd/rasterizer_storage_rd.h
+++ b/servers/rendering/rasterizer_rd/rasterizer_storage_rd.h
@@ -173,6 +173,50 @@ private:
 	RID default_rd_textures[DEFAULT_RD_TEXTURE_MAX];
 	RID default_rd_samplers[RS::CANVAS_ITEM_TEXTURE_FILTER_MAX][RS::CANVAS_ITEM_TEXTURE_REPEAT_MAX];
 
+	/* DECAL ATLAS */
+
+	struct DecalAtlas {
+		struct Texture {
+
+			int users;
+			Rect2 uv_rect;
+		};
+
+		struct SortItem {
+			RID texture;
+			Size2i pixel_size;
+			Size2i size;
+			Point2i pos;
+
+			bool operator<(const SortItem &p_item) const {
+				//sort larger to smaller
+				if (size.height == p_item.size.height) {
+					return size.width > p_item.size.width;
+				} else {
+					return size.height > p_item.size.height;
+				}
+			}
+		};
+
+		HashMap<RID, Texture> textures;
+		bool dirty = true;
+		int mipmaps = 5;
+
+		RID texture;
+		RID texture_srgb;
+		struct MipMap {
+			RID fb;
+			RID texture;
+			Size2i size;
+		};
+		Vector<MipMap> texture_mipmaps;
+
+		Size2i size;
+
+	} decal_atlas;
+
+	void _update_decal_atlas();
+
 	/* SHADER */
 
 	struct Material;
@@ -403,6 +447,28 @@ private:
 
 	mutable RID_Owner<ReflectionProbe> reflection_probe_owner;
 
+	/* DECAL */
+
+	struct Decal {
+
+		Vector3 extents = Vector3(1, 1, 1);
+		RID textures[RS::DECAL_TEXTURE_MAX];
+		float emission_energy = 1.0;
+		float albedo_mix = 1.0;
+		Color modulate = Color(1, 1, 1, 1);
+		uint32_t cull_mask = (1 << 20) - 1;
+		float upper_fade = 0.3;
+		float lower_fade = 0.3;
+		bool distance_fade = false;
+		float distance_fade_begin = 10;
+		float distance_fade_length = 1;
+		float normal_fade = 0.0;
+
+		RasterizerScene::InstanceDependency instance_dependency;
+	};
+
+	mutable RID_Owner<Decal> decal_owner;
+
 	/* GI PROBE */
 
 	struct GIProbe {
@@ -533,6 +599,20 @@ public:
 
 	virtual Size2 texture_size_with_proxy(RID p_proxy);
 
+	virtual void texture_add_to_decal_atlas(RID p_texture);
+	virtual void texture_remove_from_decal_atlas(RID p_texture);
+
+	RID decal_atlas_get_texture() const;
+	RID decal_atlas_get_texture_srgb() const;
+	_FORCE_INLINE_ Rect2 decal_atlas_get_texture_rect(RID p_texture) {
+		DecalAtlas::Texture *t = decal_atlas.textures.getptr(p_texture);
+		if (!t) {
+			return Rect2();
+		}
+
+		return t->uv_rect;
+	}
+
 	//internal usage
 
 	_FORCE_INLINE_ RID texture_get_rd_texture(RID p_texture, bool p_srgb = false) {
@@ -972,6 +1052,81 @@ public:
 	void base_update_dependency(RID p_base, RasterizerScene::InstanceBase *p_instance);
 	void skeleton_update_dependency(RID p_skeleton, RasterizerScene::InstanceBase *p_instance);
 
+	/* DECAL API */
+
+	virtual RID decal_create();
+	virtual void decal_set_extents(RID p_decal, const Vector3 &p_extents);
+	virtual void decal_set_texture(RID p_decal, RS::DecalTexture p_type, RID p_texture);
+	virtual void decal_set_emission_energy(RID p_decal, float p_energy);
+	virtual void decal_set_albedo_mix(RID p_decal, float p_mix);
+	virtual void decal_set_modulate(RID p_decal, const Color &p_modulate);
+	virtual void decal_set_cull_mask(RID p_decal, uint32_t p_layers);
+	virtual void decal_set_distance_fade(RID p_decal, bool p_enabled, float p_begin, float p_length);
+	virtual void decal_set_fade(RID p_decal, float p_above, float p_below);
+	virtual void decal_set_normal_fade(RID p_decal, float p_fade);
+
+	_FORCE_INLINE_ Vector3 decal_get_extents(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->extents;
+	}
+
+	_FORCE_INLINE_ RID decal_get_texture(RID p_decal, RS::DecalTexture p_texture) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->textures[p_texture];
+	}
+
+	_FORCE_INLINE_ Color decal_get_modulate(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->modulate;
+	}
+
+	_FORCE_INLINE_ float decal_get_emission_energy(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->emission_energy;
+	}
+
+	_FORCE_INLINE_ float decal_get_albedo_mix(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->albedo_mix;
+	}
+
+	_FORCE_INLINE_ uint32_t decal_get_cull_mask(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->cull_mask;
+	}
+
+	_FORCE_INLINE_ float decal_get_upper_fade(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->upper_fade;
+	}
+
+	_FORCE_INLINE_ float decal_get_lower_fade(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->lower_fade;
+	}
+
+	_FORCE_INLINE_ float decal_get_normal_fade(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->normal_fade;
+	}
+
+	_FORCE_INLINE_ bool decal_is_distance_fade_enabled(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->distance_fade;
+	}
+
+	_FORCE_INLINE_ float decal_get_distance_fade_begin(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->distance_fade_begin;
+	}
+
+	_FORCE_INLINE_ float decal_get_distance_fade_length(RID p_decal) {
+		const Decal *decal = decal_owner.getornull(p_decal);
+		return decal->distance_fade_length;
+	}
+
+	virtual AABB decal_get_aabb(RID p_decal) const;
+
 	/* GI PROBE API */
 
 	RID gi_probe_create();