/*************************************************************************/
/*  rasterizer_scene_gles3.h                                             */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifndef RASTERIZER_SCENE_OPENGL_H
#define RASTERIZER_SCENE_OPENGL_H

#ifdef GLES3_ENABLED

#include "core/math/camera_matrix.h"
#include "core/templates/paged_allocator.h"
#include "core/templates/rid_owner.h"
#include "core/templates/self_list.h"
#include "scene/resources/mesh.h"
#include "servers/rendering/renderer_compositor.h"
#include "servers/rendering/renderer_scene_render.h"
#include "servers/rendering_server.h"
#include "shader_gles3.h"
#include "shaders/cubemap_filter.glsl.gen.h"
#include "shaders/sky.glsl.gen.h"
#include "storage/material_storage.h"
#include "storage/utilities.h"

enum RenderListType {
	RENDER_LIST_OPAQUE, //used for opaque objects
	RENDER_LIST_ALPHA, //used for transparent objects
	RENDER_LIST_SECONDARY, //used for shadows and other objects
	RENDER_LIST_MAX
};

enum PassMode {
	PASS_MODE_COLOR,
	PASS_MODE_COLOR_TRANSPARENT,
	PASS_MODE_COLOR_ADDITIVE,
	PASS_MODE_SHADOW,
	PASS_MODE_DEPTH,
};

// These should share as much as possible with SkyUniform Location
enum SceneUniformLocation {
	SCENE_TONEMAP_UNIFORM_LOCATION,
	SCENE_GLOBALS_UNIFORM_LOCATION,
	SCENE_DATA_UNIFORM_LOCATION,
	SCENE_MATERIAL_UNIFORM_LOCATION,
	SCENE_EMPTY, // Unused, put here to avoid conflicts with SKY_DIRECTIONAL_LIGHT_UNIFORM_LOCATION.
	SCENE_OMNILIGHT_UNIFORM_LOCATION,
	SCENE_SPOTLIGHT_UNIFORM_LOCATION,
	SCENE_DIRECTIONAL_LIGHT_UNIFORM_LOCATION,
};

enum SkyUniformLocation {
	SKY_TONEMAP_UNIFORM_LOCATION,
	SKY_GLOBALS_UNIFORM_LOCATION,
	SKY_EMPTY, // Unused, put here to avoid conflicts with SCENE_DATA_UNIFORM_LOCATION.
	SKY_MATERIAL_UNIFORM_LOCATION,
	SKY_DIRECTIONAL_LIGHT_UNIFORM_LOCATION,
};

enum {
	SPEC_CONSTANT_DISABLE_LIGHTMAP = 0,
	SPEC_CONSTANT_DISABLE_DIRECTIONAL_LIGHTS = 1,
	SPEC_CONSTANT_DISABLE_OMNI_LIGHTS = 2,
	SPEC_CONSTANT_DISABLE_SPOT_LIGHTS = 3,
	SPEC_CONSTANT_DISABLE_FOG = 4,
};

struct RenderDataGLES3 {
	RID render_buffers = RID();
	bool transparent_bg = false;

	Transform3D cam_transform = Transform3D();
	Transform3D inv_cam_transform = Transform3D();
	CameraMatrix cam_projection = CameraMatrix();
	bool cam_orthogonal = false;

	// For stereo rendering
	uint32_t view_count = 1;
	Vector3 view_eye_offset[RendererSceneRender::MAX_RENDER_VIEWS];
	CameraMatrix view_projection[RendererSceneRender::MAX_RENDER_VIEWS];

	float z_near = 0.0;
	float z_far = 0.0;

	const PagedArray<RendererSceneRender::GeometryInstance *> *instances = nullptr;
	const PagedArray<RID> *lights = nullptr;
	const PagedArray<RID> *reflection_probes = nullptr;
	RID environment = RID();
	RID camera_effects = RID();
	RID reflection_probe = RID();
	int reflection_probe_pass = 0;

	float lod_distance_multiplier = 0.0;
	Plane lod_camera_plane = Plane();
	float screen_mesh_lod_threshold = 0.0;

	uint32_t directional_light_count = 0;
	uint32_t spot_light_count = 0;
	uint32_t omni_light_count = 0;

	RendererScene::RenderInfo *render_info = nullptr;
};

class RasterizerCanvasGLES3;

class RasterizerSceneGLES3 : public RendererSceneRender {
private:
	static RasterizerSceneGLES3 *singleton;
	RS::ViewportDebugDraw debug_draw = RS::VIEWPORT_DEBUG_DRAW_DISABLED;
	uint64_t scene_pass = 0;

	template <class T>
	struct InstanceSort {
		float depth;
		T *instance = nullptr;
		bool operator<(const InstanceSort &p_sort) const {
			return depth < p_sort.depth;
		}
	};

	struct SceneGlobals {
		RID shader_default_version;
		RID default_material;
		RID default_shader;
		RID cubemap_filter_shader_version;
	} scene_globals;

	/* LIGHT INSTANCE */

	struct LightData {
		float position[3];
		float inv_radius;

		float direction[3]; // Only used by SpotLight
		float size;

		float color[3];
		float attenuation;

		float inv_spot_attenuation;
		float cos_spot_angle;
		float specular_amount;
		uint32_t shadow_enabled;
	};
	static_assert(sizeof(LightData) % 16 == 0, "LightData size must be a multiple of 16 bytes");

	struct DirectionalLightData {
		float direction[3];
		float energy;

		float color[3];
		float size;

		uint32_t enabled; // For use by SkyShaders
		float pad[2];
		float specular;
	};
	static_assert(sizeof(DirectionalLightData) % 16 == 0, "DirectionalLightData size must be a multiple of 16 bytes");

	struct LightInstance {
		RS::LightType light_type = RS::LIGHT_DIRECTIONAL;

		AABB aabb;
		RID self;
		RID light;
		Transform3D transform;

		Vector3 light_vector;
		Vector3 spot_vector;
		float linear_att = 0.0;

		uint64_t shadow_pass = 0;
		uint64_t last_scene_pass = 0;
		uint64_t last_scene_shadow_pass = 0;
		uint64_t last_pass = 0;
		uint32_t cull_mask = 0;
		uint32_t light_directional_index = 0;

		Rect2 directional_rect;

		uint32_t gl_id = -1;

		LightInstance() {}
	};

	mutable RID_Owner<LightInstance> light_instance_owner;

	struct GeometryInstanceGLES3;

	// Cached data for drawing surfaces
	struct GeometryInstanceSurface {
		enum {
			FLAG_PASS_DEPTH = 1,
			FLAG_PASS_OPAQUE = 2,
			FLAG_PASS_ALPHA = 4,
			FLAG_PASS_SHADOW = 8,
			FLAG_USES_SHARED_SHADOW_MATERIAL = 128,
			FLAG_USES_SCREEN_TEXTURE = 2048,
			FLAG_USES_DEPTH_TEXTURE = 4096,
			FLAG_USES_NORMAL_TEXTURE = 8192,
			FLAG_USES_DOUBLE_SIDED_SHADOWS = 16384,
		};

		union {
			struct {
				uint64_t lod_index : 8;
				uint64_t surface_index : 8;
				uint64_t geometry_id : 32;
				uint64_t material_id_low : 16;

				uint64_t material_id_hi : 16;
				uint64_t shader_id : 32;
				uint64_t uses_softshadow : 1;
				uint64_t uses_projector : 1;
				uint64_t uses_forward_gi : 1;
				uint64_t uses_lightmap : 1;
				uint64_t depth_layer : 4;
				uint64_t priority : 8;
			};
			struct {
				uint64_t sort_key1;
				uint64_t sort_key2;
			};
		} sort;

		RS::PrimitiveType primitive = RS::PRIMITIVE_MAX;
		uint32_t flags = 0;
		uint32_t surface_index = 0;
		uint32_t lod_index = 0;

		void *surface = nullptr;
		GLES3::SceneShaderData *shader = nullptr;
		GLES3::SceneMaterialData *material = nullptr;

		void *surface_shadow = nullptr;
		GLES3::SceneShaderData *shader_shadow = nullptr;
		GLES3::SceneMaterialData *material_shadow = nullptr;

		GeometryInstanceSurface *next = nullptr;
		GeometryInstanceGLES3 *owner = nullptr;
	};

	struct GeometryInstanceGLES3 : public GeometryInstance {
		//used during rendering
		bool mirror = false;
		bool non_uniform_scale = false;
		float lod_bias = 0.0;
		float lod_model_scale = 1.0;
		AABB transformed_aabb; //needed for LOD
		float depth = 0;
		uint32_t flags_cache = 0;
		bool store_transform_cache = true;
		int32_t shader_parameters_offset = -1;

		uint32_t layer_mask = 1;
		int32_t instance_count = 0;

		RID mesh_instance;
		bool can_sdfgi = false;
		bool using_projectors = false;
		bool using_softshadows = false;
		bool fade_near = false;
		float fade_near_begin = 0;
		float fade_near_end = 0;
		bool fade_far = false;
		float fade_far_begin = 0;
		float fade_far_end = 0;
		float force_alpha = 1.0;
		float parent_fade_alpha = 1.0;

		uint32_t omni_light_count = 0;
		LocalVector<RID> omni_lights;
		uint32_t spot_light_count = 0;
		LocalVector<RID> spot_lights;
		LocalVector<uint32_t> omni_light_gl_cache;
		LocalVector<uint32_t> spot_light_gl_cache;

		//used during setup
		uint32_t base_flags = 0;
		Transform3D transform;
		GeometryInstanceSurface *surface_caches = nullptr;
		SelfList<GeometryInstanceGLES3> dirty_list_element;

		struct Data {
			//data used less often goes into regular heap
			RID base;
			RS::InstanceType base_type;

			RID skeleton;
			Vector<RID> surface_materials;
			RID material_override;
			RID material_overlay;
			AABB aabb;

			bool use_dynamic_gi = false;
			bool use_baked_light = false;
			bool cast_double_sided_shadows = false;
			bool mirror = false;
			bool dirty_dependencies = false;

			DependencyTracker dependency_tracker;
		};

		Data *data = nullptr;

		GeometryInstanceGLES3() :
				dirty_list_element(this) {}
	};

	enum {
		INSTANCE_DATA_FLAGS_NON_UNIFORM_SCALE = 1 << 5,
		INSTANCE_DATA_FLAG_USE_GI_BUFFERS = 1 << 6,
		INSTANCE_DATA_FLAG_USE_LIGHTMAP_CAPTURE = 1 << 8,
		INSTANCE_DATA_FLAG_USE_LIGHTMAP = 1 << 9,
		INSTANCE_DATA_FLAG_USE_SH_LIGHTMAP = 1 << 10,
		INSTANCE_DATA_FLAG_USE_VOXEL_GI = 1 << 11,
		INSTANCE_DATA_FLAG_MULTIMESH = 1 << 12,
		INSTANCE_DATA_FLAG_MULTIMESH_FORMAT_2D = 1 << 13,
		INSTANCE_DATA_FLAG_MULTIMESH_HAS_COLOR = 1 << 14,
		INSTANCE_DATA_FLAG_MULTIMESH_HAS_CUSTOM_DATA = 1 << 15,
	};

	static void _geometry_instance_dependency_changed(Dependency::DependencyChangedNotification p_notification, DependencyTracker *p_tracker);
	static void _geometry_instance_dependency_deleted(const RID &p_dependency, DependencyTracker *p_tracker);

	SelfList<GeometryInstanceGLES3>::List geometry_instance_dirty_list;

	// Use PagedAllocator instead of RID to maximize performance
	PagedAllocator<GeometryInstanceGLES3> geometry_instance_alloc;
	PagedAllocator<GeometryInstanceSurface> geometry_instance_surface_alloc;

	void _geometry_instance_add_surface_with_material(GeometryInstanceGLES3 *ginstance, uint32_t p_surface, GLES3::SceneMaterialData *p_material, uint32_t p_material_id, uint32_t p_shader_id, RID p_mesh);
	void _geometry_instance_add_surface_with_material_chain(GeometryInstanceGLES3 *ginstance, uint32_t p_surface, GLES3::SceneMaterialData *p_material, RID p_mat_src, RID p_mesh);
	void _geometry_instance_add_surface(GeometryInstanceGLES3 *ginstance, uint32_t p_surface, RID p_material, RID p_mesh);
	void _geometry_instance_mark_dirty(GeometryInstance *p_geometry_instance);
	void _geometry_instance_update(GeometryInstance *p_geometry_instance);
	void _update_dirty_geometry_instances();

	struct SceneState {
		struct UBO {
			float projection_matrix[16];
			float inv_projection_matrix[16];
			float inv_view_matrix[16];
			float view_matrix[16];

			float viewport_size[2];
			float screen_pixel_size[2];

			float ambient_light_color_energy[4];

			float ambient_color_sky_mix;
			uint32_t material_uv2_mode;
			float pad2;
			uint32_t use_ambient_light = 0;

			uint32_t use_ambient_cubemap = 0;
			uint32_t use_reflection_cubemap = 0;
			float fog_aerial_perspective;
			float time;

			float radiance_inverse_xform[12];

			uint32_t directional_light_count;
			float z_far;
			float z_near;
			float pad1;

			uint32_t fog_enabled;
			float fog_density;
			float fog_height;
			float fog_height_density;

			float fog_light_color[3];
			float fog_sun_scatter;
		};
		static_assert(sizeof(UBO) % 16 == 0, "Scene UBO size must be a multiple of 16 bytes");

		struct TonemapUBO {
			float exposure = 1.0;
			float white = 1.0;
			int32_t tonemapper = 0;
			int32_t pad = 0;
		};
		static_assert(sizeof(TonemapUBO) % 16 == 0, "Tonemap UBO size must be a multiple of 16 bytes");

		UBO ubo;
		GLuint ubo_buffer = 0;
		GLuint tonemap_buffer = 0;

		bool used_depth_prepass = false;

		GLES3::SceneShaderData::BlendMode current_blend_mode = GLES3::SceneShaderData::BLEND_MODE_MIX;
		GLES3::SceneShaderData::DepthDraw current_depth_draw = GLES3::SceneShaderData::DEPTH_DRAW_OPAQUE;
		GLES3::SceneShaderData::DepthTest current_depth_test = GLES3::SceneShaderData::DEPTH_TEST_DISABLED;
		GLES3::SceneShaderData::Cull cull_mode = GLES3::SceneShaderData::CULL_BACK;

		bool texscreen_copied = false;
		bool used_screen_texture = false;
		bool used_normal_texture = false;
		bool used_depth_texture = false;

		LightData *omni_lights = nullptr;
		LightData *spot_lights = nullptr;

		InstanceSort<LightInstance> *omni_light_sort;
		InstanceSort<LightInstance> *spot_light_sort;
		GLuint omni_light_buffer = 0;
		GLuint spot_light_buffer = 0;
		uint32_t omni_light_count = 0;
		uint32_t spot_light_count = 0;

		DirectionalLightData *directional_lights = nullptr;
		GLuint directional_light_buffer = 0;
	} scene_state;

	struct RenderListParameters {
		GeometryInstanceSurface **elements = nullptr;
		int element_count = 0;
		bool reverse_cull = false;
		uint32_t spec_constant_base_flags = 0;
		bool force_wireframe = false;

		RenderListParameters(GeometryInstanceSurface **p_elements, int p_element_count, bool p_reverse_cull, uint32_t p_spec_constant_base_flags, bool p_force_wireframe = false) {
			elements = p_elements;
			element_count = p_element_count;
			reverse_cull = p_reverse_cull;
			spec_constant_base_flags = p_spec_constant_base_flags;
			force_wireframe = p_force_wireframe;
		}
	};

	struct RenderList {
		LocalVector<GeometryInstanceSurface *> elements;

		void clear() {
			elements.clear();
		}

		//should eventually be replaced by radix

		struct SortByKey {
			_FORCE_INLINE_ bool operator()(const GeometryInstanceSurface *A, const GeometryInstanceSurface *B) const {
				return (A->sort.sort_key2 == B->sort.sort_key2) ? (A->sort.sort_key1 < B->sort.sort_key1) : (A->sort.sort_key2 < B->sort.sort_key2);
			}
		};

		void sort_by_key() {
			SortArray<GeometryInstanceSurface *, SortByKey> sorter;
			sorter.sort(elements.ptr(), elements.size());
		}

		void sort_by_key_range(uint32_t p_from, uint32_t p_size) {
			SortArray<GeometryInstanceSurface *, SortByKey> sorter;
			sorter.sort(elements.ptr() + p_from, p_size);
		}

		struct SortByDepth {
			_FORCE_INLINE_ bool operator()(const GeometryInstanceSurface *A, const GeometryInstanceSurface *B) const {
				return (A->owner->depth < B->owner->depth);
			}
		};

		void sort_by_depth() { //used for shadows

			SortArray<GeometryInstanceSurface *, SortByDepth> sorter;
			sorter.sort(elements.ptr(), elements.size());
		}

		struct SortByReverseDepthAndPriority {
			_FORCE_INLINE_ bool operator()(const GeometryInstanceSurface *A, const GeometryInstanceSurface *B) const {
				return (A->sort.priority == B->sort.priority) ? (A->owner->depth > B->owner->depth) : (A->sort.priority < B->sort.priority);
			}
		};

		void sort_by_reverse_depth_and_priority() { //used for alpha

			SortArray<GeometryInstanceSurface *, SortByReverseDepthAndPriority> sorter;
			sorter.sort(elements.ptr(), elements.size());
		}

		_FORCE_INLINE_ void add_element(GeometryInstanceSurface *p_element) {
			elements.push_back(p_element);
		}
	};

	RenderList render_list[RENDER_LIST_MAX];

	void _setup_lights(const RenderDataGLES3 *p_render_data, bool p_using_shadows, uint32_t &r_directional_light_count, uint32_t &r_omni_light_count, uint32_t &r_spot_light_count);
	void _setup_environment(const RenderDataGLES3 *p_render_data, bool p_no_fog, const Size2i &p_screen_size, bool p_flip_y, const Color &p_default_bg_color, bool p_pancake_shadows);
	void _fill_render_list(RenderListType p_render_list, const RenderDataGLES3 *p_render_data, PassMode p_pass_mode, bool p_append = false);

	template <PassMode p_pass_mode>
	_FORCE_INLINE_ void _render_list_template(RenderListParameters *p_params, const RenderDataGLES3 *p_render_data, uint32_t p_from_element, uint32_t p_to_element, bool p_alpha_pass = false);

protected:
	double time;
	double time_step = 0;

	struct RenderBuffers {
		int internal_width = 0;
		int internal_height = 0;
		int width = 0;
		int height = 0;
		//float fsr_sharpness = 0.2f;
		RS::ViewportMSAA msaa = RS::VIEWPORT_MSAA_DISABLED;
		//RS::ViewportScreenSpaceAA screen_space_aa = RS::VIEWPORT_SCREEN_SPACE_AA_DISABLED;
		//bool use_debanding = false;
		//uint32_t view_count = 1;

		bool is_transparent = false;

		RID render_target;
		GLuint internal_texture = 0; // Used for rendering when post effects are enabled
		GLuint depth_texture = 0; // Main depth texture
		GLuint framebuffer = 0; // Main framebuffer, contains internal_texture and depth_texture or render_target->color and depth_texture

		//built-in textures used for ping pong image processing and blurring
		struct Blur {
			RID texture;

			struct Mipmap {
				RID texture;
				int width;
				int height;
				GLuint fbo;
			};

			Vector<Mipmap> mipmaps;
		};

		Blur blur[2]; //the second one starts from the first mipmap
	};

	bool screen_space_roughness_limiter = false;
	float screen_space_roughness_limiter_amount = 0.25;
	float screen_space_roughness_limiter_limit = 0.18;

	mutable RID_Owner<RenderBuffers, true> render_buffers_owner;

	void _free_render_buffer_data(RenderBuffers *rb);
	void _allocate_blur_textures(RenderBuffers *rb);
	void _allocate_depth_backbuffer_textures(RenderBuffers *rb);

	void _render_buffers_debug_draw(RID p_render_buffers, RID p_shadow_atlas, RID p_occlusion_buffer);

	/* Environment */

	struct Environment {
		// BG
		RS::EnvironmentBG background = RS::ENV_BG_CLEAR_COLOR;
		RID sky;
		float sky_custom_fov = 0.0;
		Basis sky_orientation;
		Color bg_color;
		float bg_energy = 1.0;
		int canvas_max_layer = 0;
		RS::EnvironmentAmbientSource ambient_source = RS::ENV_AMBIENT_SOURCE_BG;
		Color ambient_light;
		float ambient_light_energy = 1.0;
		float ambient_sky_contribution = 1.0;
		RS::EnvironmentReflectionSource reflection_source = RS::ENV_REFLECTION_SOURCE_BG;
		Color ao_color;

		/// Tonemap

		RS::EnvironmentToneMapper tone_mapper;
		float exposure = 1.0;
		float white = 1.0;
		bool auto_exposure = false;
		float min_luminance = 0.2;
		float max_luminance = 8.0;
		float auto_exp_speed = 0.2;
		float auto_exp_scale = 0.5;
		uint64_t auto_exposure_version = 0;

		// Fog
		bool fog_enabled = false;
		Color fog_light_color = Color(0.5, 0.6, 0.7);
		float fog_light_energy = 1.0;
		float fog_sun_scatter = 0.0;
		float fog_density = 0.001;
		float fog_height = 0.0;
		float fog_height_density = 0.0; //can be negative to invert effect
		float fog_aerial_perspective = 0.0;

		/// Glow
		bool glow_enabled = false;
		Vector<float> glow_levels;
		float glow_intensity = 0.8;
		float glow_strength = 1.0;
		float glow_bloom = 0.0;
		float glow_mix = 0.01;
		RS::EnvironmentGlowBlendMode glow_blend_mode = RS::ENV_GLOW_BLEND_MODE_SOFTLIGHT;
		float glow_hdr_bleed_threshold = 1.0;
		float glow_hdr_luminance_cap = 12.0;
		float glow_hdr_bleed_scale = 2.0;
		float glow_map_strength = 1.0;
		RID glow_map = RID();

		/// SSAO
		bool ssao_enabled = false;
		float ssao_radius = 1.0;
		float ssao_intensity = 2.0;
		float ssao_power = 1.5;
		float ssao_detail = 0.5;
		float ssao_horizon = 0.06;
		float ssao_sharpness = 0.98;
		float ssao_direct_light_affect = 0.0;
		float ssao_ao_channel_affect = 0.0;

		/// SSR
		bool ssr_enabled = false;
		int ssr_max_steps = 64;
		float ssr_fade_in = 0.15;
		float ssr_fade_out = 2.0;
		float ssr_depth_tolerance = 0.2;

		/// Adjustments
		bool adjustments_enabled = false;
		float adjustments_brightness = 1.0f;
		float adjustments_contrast = 1.0f;
		float adjustments_saturation = 1.0f;
		bool use_1d_color_correction = false;
		RID color_correction = RID();
	};

	RS::EnvironmentSSAOQuality ssao_quality = RS::ENV_SSAO_QUALITY_MEDIUM;
	bool ssao_half_size = false;
	bool ssao_using_half_size = false;
	float ssao_adaptive_target = 0.5;
	int ssao_blur_passes = 2;
	float ssao_fadeout_from = 50.0;
	float ssao_fadeout_to = 300.0;

	bool glow_bicubic_upscale = false;
	bool glow_high_quality = false;
	RS::EnvironmentSSRRoughnessQuality ssr_roughness_quality = RS::ENV_SSR_ROUGHNESS_QUALITY_LOW;

	static uint64_t auto_exposure_counter;

	mutable RID_Owner<Environment, true> environment_owner;

	/* Sky */

	struct SkyGlobals {
		float fog_aerial_perspective = 0.0;
		Color fog_light_color;
		float fog_sun_scatter = 0.0;
		bool fog_enabled = false;
		float fog_density = 0.0;
		float z_far = 0.0;
		uint32_t directional_light_count = 0;

		DirectionalLightData *directional_lights = nullptr;
		DirectionalLightData *last_frame_directional_lights = nullptr;
		uint32_t last_frame_directional_light_count = 0;
		GLuint directional_light_buffer = 0;

		RID shader_default_version;
		RID default_material;
		RID default_shader;
		RID fog_material;
		RID fog_shader;
		GLuint screen_triangle = 0;
		GLuint screen_triangle_array = 0;
		GLuint radical_inverse_vdc_cache_tex = 0;
		uint32_t max_directional_lights = 4;
		uint32_t roughness_layers = 8;
		uint32_t ggx_samples = 128;
	} sky_globals;

	struct Sky {
		// Screen Buffers
		GLuint half_res_pass = 0;
		GLuint half_res_framebuffer = 0;
		GLuint quarter_res_pass = 0;
		GLuint quarter_res_framebuffer = 0;
		Size2i screen_size = Size2i(0, 0);

		// Radiance Cubemap
		GLuint radiance = 0;
		GLuint radiance_framebuffer = 0;
		GLuint raw_radiance = 0;

		RID material;
		GLuint uniform_buffer;

		int radiance_size = 256;
		int mipmap_count = 1;

		RS::SkyMode mode = RS::SKY_MODE_AUTOMATIC;

		//ReflectionData reflection;
		bool reflection_dirty = false;
		bool dirty = false;
		int processing_layer = 0;
		Sky *dirty_list = nullptr;

		//State to track when radiance cubemap needs updating
		GLES3::SkyMaterialData *prev_material;
		Vector3 prev_position = Vector3(0.0, 0.0, 0.0);
		float prev_time = 0.0f;
	};

	Sky *dirty_sky_list = nullptr;
	mutable RID_Owner<Sky, true> sky_owner;

	void _setup_sky(Environment *p_env, RID p_render_buffers, const PagedArray<RID> &p_lights, const CameraMatrix &p_projection, const Transform3D &p_transform, const Size2i p_screen_size);
	void _invalidate_sky(Sky *p_sky);
	void _update_dirty_skys();
	void _update_sky_radiance(Environment *p_env, const CameraMatrix &p_projection, const Transform3D &p_transform);
	void _filter_sky_radiance(Sky *p_sky, int p_base_layer);
	void _draw_sky(Environment *p_env, const CameraMatrix &p_projection, const Transform3D &p_transform);
	void _free_sky_data(Sky *p_sky);

public:
	RasterizerCanvasGLES3 *canvas;

	GeometryInstance *geometry_instance_create(RID p_base) override;
	void geometry_instance_set_skeleton(GeometryInstance *p_geometry_instance, RID p_skeleton) override;
	void geometry_instance_set_material_override(GeometryInstance *p_geometry_instance, RID p_override) override;
	void geometry_instance_set_material_overlay(GeometryInstance *p_geometry_instance, RID p_overlay) override;
	void geometry_instance_set_surface_materials(GeometryInstance *p_geometry_instance, const Vector<RID> &p_material) override;
	void geometry_instance_set_mesh_instance(GeometryInstance *p_geometry_instance, RID p_mesh_instance) override;
	void geometry_instance_set_transform(GeometryInstance *p_geometry_instance, const Transform3D &p_transform, const AABB &p_aabb, const AABB &p_transformed_aabbb) override;
	void geometry_instance_set_layer_mask(GeometryInstance *p_geometry_instance, uint32_t p_layer_mask) override;
	void geometry_instance_set_lod_bias(GeometryInstance *p_geometry_instance, float p_lod_bias) override;
	void geometry_instance_set_transparency(GeometryInstance *p_geometry_instance, float p_transparency) override;
	void geometry_instance_set_fade_range(GeometryInstance *p_geometry_instance, bool p_enable_near, float p_near_begin, float p_near_end, bool p_enable_far, float p_far_begin, float p_far_end) override;
	void geometry_instance_set_parent_fade_alpha(GeometryInstance *p_geometry_instance, float p_alpha) override;
	void geometry_instance_set_use_baked_light(GeometryInstance *p_geometry_instance, bool p_enable) override;
	void geometry_instance_set_use_dynamic_gi(GeometryInstance *p_geometry_instance, bool p_enable) override;
	void geometry_instance_set_use_lightmap(GeometryInstance *p_geometry_instance, RID p_lightmap_instance, const Rect2 &p_lightmap_uv_scale, int p_lightmap_slice_index) override;
	void geometry_instance_set_lightmap_capture(GeometryInstance *p_geometry_instance, const Color *p_sh9) override;
	void geometry_instance_set_instance_shader_parameters_offset(GeometryInstance *p_geometry_instance, int32_t p_offset) override;
	void geometry_instance_set_cast_double_sided_shadows(GeometryInstance *p_geometry_instance, bool p_enable) override;

	uint32_t geometry_instance_get_pair_mask() override;
	void geometry_instance_pair_light_instances(GeometryInstance *p_geometry_instance, const RID *p_light_instances, uint32_t p_light_instance_count) override;
	void geometry_instance_pair_reflection_probe_instances(GeometryInstance *p_geometry_instance, const RID *p_reflection_probe_instances, uint32_t p_reflection_probe_instance_count) override;
	void geometry_instance_pair_decal_instances(GeometryInstance *p_geometry_instance, const RID *p_decal_instances, uint32_t p_decal_instance_count) override;
	void geometry_instance_pair_voxel_gi_instances(GeometryInstance *p_geometry_instance, const RID *p_voxel_gi_instances, uint32_t p_voxel_gi_instance_count) override;
	void geometry_instance_set_softshadow_projector_pairing(GeometryInstance *p_geometry_instance, bool p_softshadow, bool p_projector) override;

	void geometry_instance_free(GeometryInstance *p_geometry_instance) override;

	/* SHADOW ATLAS API */

	RID shadow_atlas_create() override;
	void shadow_atlas_set_size(RID p_atlas, int p_size, bool p_16_bits = true) override;
	void shadow_atlas_set_quadrant_subdivision(RID p_atlas, int p_quadrant, int p_subdivision) override;
	bool shadow_atlas_update_light(RID p_atlas, RID p_light_intance, float p_coverage, uint64_t p_light_version) override;

	void directional_shadow_atlas_set_size(int p_size, bool p_16_bits = true) override;
	int get_directional_light_shadow_size(RID p_light_intance) override;
	void set_directional_shadow_count(int p_count) override;

	/* SDFGI UPDATE */

	void sdfgi_update(RID p_render_buffers, RID p_environment, const Vector3 &p_world_position) override {}
	int sdfgi_get_pending_region_count(RID p_render_buffers) const override {
		return 0;
	}
	AABB sdfgi_get_pending_region_bounds(RID p_render_buffers, int p_region) const override {
		return AABB();
	}
	uint32_t sdfgi_get_pending_region_cascade(RID p_render_buffers, int p_region) const override {
		return 0;
	}

	/* SKY API */

	RID sky_allocate() override;
	void sky_initialize(RID p_rid) override;
	void sky_set_radiance_size(RID p_sky, int p_radiance_size) override;
	void sky_set_mode(RID p_sky, RS::SkyMode p_mode) override;
	void sky_set_material(RID p_sky, RID p_material) override;
	Ref<Image> sky_bake_panorama(RID p_sky, float p_energy, bool p_bake_irradiance, const Size2i &p_size) override;

	/* ENVIRONMENT API */

	RID environment_allocate() override;
	void environment_initialize(RID p_rid) override;
	void environment_set_background(RID p_env, RS::EnvironmentBG p_bg) override;
	void environment_set_sky(RID p_env, RID p_sky) override;
	void environment_set_sky_custom_fov(RID p_env, float p_scale) override;
	void environment_set_sky_orientation(RID p_env, const Basis &p_orientation) override;
	void environment_set_bg_color(RID p_env, const Color &p_color) override;
	void environment_set_bg_energy(RID p_env, float p_energy) override;
	void environment_set_canvas_max_layer(RID p_env, int p_max_layer) override;
	void environment_set_ambient_light(RID p_env, const Color &p_color, RS::EnvironmentAmbientSource p_ambient = RS::ENV_AMBIENT_SOURCE_BG, float p_energy = 1.0, float p_sky_contribution = 0.0, RS::EnvironmentReflectionSource p_reflection_source = RS::ENV_REFLECTION_SOURCE_BG) override;

	void environment_set_glow(RID p_env, bool p_enable, Vector<float> p_levels, float p_intensity, float p_strength, float p_mix, float p_bloom_threshold, RS::EnvironmentGlowBlendMode p_blend_mode, float p_hdr_bleed_threshold, float p_hdr_bleed_scale, float p_hdr_luminance_cap, float p_glow_map_strength, RID p_glow_map) override;
	void environment_glow_set_use_bicubic_upscale(bool p_enable) override;
	void environment_glow_set_use_high_quality(bool p_enable) override;

	void environment_set_ssr(RID p_env, bool p_enable, int p_max_steps, float p_fade_int, float p_fade_out, float p_depth_tolerance) override;
	void environment_set_ssr_roughness_quality(RS::EnvironmentSSRRoughnessQuality p_quality) override;
	void environment_set_ssao(RID p_env, bool p_enable, float p_radius, float p_intensity, float p_power, float p_detail, float p_horizon, float p_sharpness, float p_light_affect, float p_ao_channel_affect) override;
	void environment_set_ssao_quality(RS::EnvironmentSSAOQuality p_quality, bool p_half_size, float p_adaptive_target, int p_blur_passes, float p_fadeout_from, float p_fadeout_to) override;
	void environment_set_ssil(RID p_env, bool p_enable, float p_radius, float p_intensity, float p_sharpness, float p_normal_rejection) override;
	void environment_set_ssil_quality(RS::EnvironmentSSILQuality p_quality, bool p_half_size, float p_adaptive_target, int p_blur_passes, float p_fadeout_from, float p_fadeout_to) override;

	void environment_set_sdfgi(RID p_env, bool p_enable, int p_cascades, float p_min_cell_size, RS::EnvironmentSDFGIYScale p_y_scale, bool p_use_occlusion, float p_bounce_feedback, bool p_read_sky, float p_energy, float p_normal_bias, float p_probe_bias) override;

	void environment_set_sdfgi_ray_count(RS::EnvironmentSDFGIRayCount p_ray_count) override;
	void environment_set_sdfgi_frames_to_converge(RS::EnvironmentSDFGIFramesToConverge p_frames) override;
	void environment_set_sdfgi_frames_to_update_light(RS::EnvironmentSDFGIFramesToUpdateLight p_update) override;

	void environment_set_tonemap(RID p_env, RS::EnvironmentToneMapper p_tone_mapper, float p_exposure, float p_white, bool p_auto_exposure, float p_min_luminance, float p_max_luminance, float p_auto_exp_speed, float p_auto_exp_scale) override;

	void environment_set_adjustment(RID p_env, bool p_enable, float p_brightness, float p_contrast, float p_saturation, bool p_use_1d_color_correction, RID p_color_correction) override;

	void environment_set_fog(RID p_env, bool p_enable, const Color &p_light_color, float p_light_energy, float p_sun_scatter, float p_density, float p_height, float p_height_density, float p_aerial_perspective) override;
	void environment_set_volumetric_fog(RID p_env, bool p_enable, float p_density, const Color &p_albedo, const Color &p_emission, float p_emission_energy, float p_anisotropy, float p_length, float p_detail_spread, float p_gi_inject, bool p_temporal_reprojection, float p_temporal_reprojection_amount, float p_ambient_inject) override;
	void environment_set_volumetric_fog_volume_size(int p_size, int p_depth) override;
	void environment_set_volumetric_fog_filter_active(bool p_enable) override;

	Ref<Image> environment_bake_panorama(RID p_env, bool p_bake_irradiance, const Size2i &p_size) override;

	bool is_environment(RID p_env) const override;
	RS::EnvironmentBG environment_get_background(RID p_env) const override;
	int environment_get_canvas_max_layer(RID p_env) const override;

	RID camera_effects_allocate() override;
	void camera_effects_initialize(RID p_rid) override;
	void camera_effects_set_dof_blur_quality(RS::DOFBlurQuality p_quality, bool p_use_jitter) override;
	void camera_effects_set_dof_blur_bokeh_shape(RS::DOFBokehShape p_shape) override;

	void camera_effects_set_dof_blur(RID p_camera_effects, bool p_far_enable, float p_far_distance, float p_far_transition, bool p_near_enable, float p_near_distance, float p_near_transition, float p_amount) override;
	void camera_effects_set_custom_exposure(RID p_camera_effects, bool p_enable, float p_exposure) override;

	void positional_soft_shadow_filter_set_quality(RS::ShadowQuality p_quality) override;
	void directional_soft_shadow_filter_set_quality(RS::ShadowQuality p_quality) override;

	RID light_instance_create(RID p_light) override;
	void light_instance_set_transform(RID p_light_instance, const Transform3D &p_transform) override;
	void light_instance_set_aabb(RID p_light_instance, const AABB &p_aabb) override;
	void light_instance_set_shadow_transform(RID p_light_instance, const CameraMatrix &p_projection, const Transform3D &p_transform, float p_far, float p_split, int p_pass, float p_shadow_texel_size, float p_bias_scale = 1.0, float p_range_begin = 0, const Vector2 &p_uv_scale = Vector2()) override;
	void light_instance_mark_visible(RID p_light_instance) override;

	_FORCE_INLINE_ RS::LightType light_instance_get_type(RID p_light_instance) {
		LightInstance *li = light_instance_owner.get_or_null(p_light_instance);
		return li->light_type;
	}
	_FORCE_INLINE_ uint32_t light_instance_get_gl_id(RID p_light_instance) {
		LightInstance *li = light_instance_owner.get_or_null(p_light_instance);
		return li->gl_id;
	}

	RID fog_volume_instance_create(RID p_fog_volume) override;
	void fog_volume_instance_set_transform(RID p_fog_volume_instance, const Transform3D &p_transform) override;
	void fog_volume_instance_set_active(RID p_fog_volume_instance, bool p_active) override;
	RID fog_volume_instance_get_volume(RID p_fog_volume_instance) const override;
	Vector3 fog_volume_instance_get_position(RID p_fog_volume_instance) const override;

	RID reflection_atlas_create() override;
	int reflection_atlas_get_size(RID p_ref_atlas) const override;
	void reflection_atlas_set_size(RID p_ref_atlas, int p_reflection_size, int p_reflection_count) override;

	RID reflection_probe_instance_create(RID p_probe) override;
	void reflection_probe_instance_set_transform(RID p_instance, const Transform3D &p_transform) override;
	void reflection_probe_release_atlas_index(RID p_instance) override;
	bool reflection_probe_instance_needs_redraw(RID p_instance) override;
	bool reflection_probe_instance_has_reflection(RID p_instance) override;
	bool reflection_probe_instance_begin_render(RID p_instance, RID p_reflection_atlas) override;
	bool reflection_probe_instance_postprocess_step(RID p_instance) override;

	RID decal_instance_create(RID p_decal) override;
	void decal_instance_set_transform(RID p_decal, const Transform3D &p_transform) override;

	RID lightmap_instance_create(RID p_lightmap) override;
	void lightmap_instance_set_transform(RID p_lightmap, const Transform3D &p_transform) override;

	RID voxel_gi_instance_create(RID p_voxel_gi) override;
	void voxel_gi_instance_set_transform_to_data(RID p_probe, const Transform3D &p_xform) override;
	bool voxel_gi_needs_update(RID p_probe) const override;
	void voxel_gi_update(RID p_probe, bool p_update_light_instances, const Vector<RID> &p_light_instances, const PagedArray<RendererSceneRender::GeometryInstance *> &p_dynamic_objects) override;

	void voxel_gi_set_quality(RS::VoxelGIQuality) override;

	void render_scene(RID p_render_buffers, const CameraData *p_camera_data, const CameraData *p_prev_camera_data, const PagedArray<GeometryInstance *> &p_instances, const PagedArray<RID> &p_lights, const PagedArray<RID> &p_reflection_probes, const PagedArray<RID> &p_voxel_gi_instances, const PagedArray<RID> &p_decals, const PagedArray<RID> &p_lightmaps, const PagedArray<RID> &p_fog_volumes, RID p_environment, RID p_camera_effects, RID p_shadow_atlas, RID p_occluder_debug_tex, RID p_reflection_atlas, RID p_reflection_probe, int p_reflection_probe_pass, float p_screen_mesh_lod_threshold, const RenderShadowData *p_render_shadows, int p_render_shadow_count, const RenderSDFGIData *p_render_sdfgi_regions, int p_render_sdfgi_region_count, const RenderSDFGIUpdateData *p_sdfgi_update_data = nullptr, RendererScene::RenderInfo *r_render_info = nullptr) override;
	void render_material(const Transform3D &p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, const PagedArray<GeometryInstance *> &p_instances, RID p_framebuffer, const Rect2i &p_region) override;
	void render_particle_collider_heightfield(RID p_collider, const Transform3D &p_transform, const PagedArray<GeometryInstance *> &p_instances) override;

	void set_scene_pass(uint64_t p_pass) override {
		scene_pass = p_pass;
	}

	_FORCE_INLINE_ uint64_t get_scene_pass() {
		return scene_pass;
	}

	void set_time(double p_time, double p_step) override;
	void set_debug_draw_mode(RS::ViewportDebugDraw p_debug_draw) override;
	_FORCE_INLINE_ RS::ViewportDebugDraw get_debug_draw_mode() const {
		return debug_draw;
	}

	RID render_buffers_create() override;
	void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override;
	void gi_set_use_half_resolution(bool p_enable) override;

	void screen_space_roughness_limiter_set_active(bool p_enable, float p_amount, float p_curve) override;
	bool screen_space_roughness_limiter_is_active() const override;

	void sub_surface_scattering_set_quality(RS::SubSurfaceScatteringQuality p_quality) override;
	void sub_surface_scattering_set_scale(float p_scale, float p_depth_scale) override;

	TypedArray<Image> bake_render_uv2(RID p_base, const Vector<RID> &p_material_overrides, const Size2i &p_image_size) override;

	bool free(RID p_rid) override;
	void update() override;
	void sdfgi_set_debug_probe_select(const Vector3 &p_position, const Vector3 &p_dir) override;

	void decals_set_filter(RS::DecalFilter p_filter) override;
	void light_projectors_set_filter(RS::LightProjectorFilter p_filter) override;

	static RasterizerSceneGLES3 *get_singleton();
	RasterizerSceneGLES3();
	~RasterizerSceneGLES3();
};

#endif // GLES3_ENABLED

#endif // RASTERIZER_SCENE_OPENGL_H