diff options
Diffstat (limited to 'source/blender/draw/engines/eevee_next/eevee_shader_shared.hh')
| -rw-r--r-- | source/blender/draw/engines/eevee_next/eevee_shader_shared.hh | 372 |
1 files changed, 371 insertions, 1 deletions
diff --git a/source/blender/draw/engines/eevee_next/eevee_shader_shared.hh b/source/blender/draw/engines/eevee_next/eevee_shader_shared.hh index 3c10f633740..a0829bc49aa 100644 --- a/source/blender/draw/engines/eevee_next/eevee_shader_shared.hh +++ b/source/blender/draw/engines/eevee_next/eevee_shader_shared.hh @@ -23,11 +23,64 @@ using draw::SwapChain; using draw::Texture; using draw::TextureFromPool; +constexpr eGPUSamplerState no_filter = GPU_SAMPLER_DEFAULT; +constexpr eGPUSamplerState with_filter = GPU_SAMPLER_FILTER; + #endif #define UBO_MIN_MAX_SUPPORTED_SIZE 1 << 14 /* -------------------------------------------------------------------- */ +/** \name Debug Mode + * \{ */ + +/** These are just to make more sense of G.debug_value's values. Reserved range is 1-30. */ +enum eDebugMode : uint32_t { + DEBUG_NONE = 0u, + /** + * Gradient showing light evaluation hot-spots. + */ + DEBUG_LIGHT_CULLING = 1u, + /** + * Show incorrectly downsample tiles in red. + */ + DEBUG_HIZ_VALIDATION = 2u, + /** + * Tile-maps to screen. Is also present in other modes. + * - Black pixels, no pages allocated. + * - Green pixels, pages cached. + * - Red pixels, pages allocated. + */ + DEBUG_SHADOW_TILEMAPS = 10u, + /** + * Random color per pages. Validates page density allocation and sampling. + */ + DEBUG_SHADOW_PAGES = 11u, + /** + * Outputs random color per tile-map (or tile-map level). Validates tile-maps coverage. + * Black means not covered by any tile-maps LOD of the shadow. + */ + DEBUG_SHADOW_LOD = 12u, + /** + * Outputs white pixels for pages allocated and black pixels for unused pages. + * This needs DEBUG_SHADOW_PAGE_ALLOCATION_ENABLED defined in order to work. + */ + DEBUG_SHADOW_PAGE_ALLOCATION = 13u, + /** + * Outputs the tile-map atlas. Default tile-map is too big for the usual screen resolution. + * Try lowering SHADOW_TILEMAP_PER_ROW and SHADOW_MAX_TILEMAP before using this option. + */ + DEBUG_SHADOW_TILE_ALLOCATION = 14u, + /** + * Visualize linear depth stored in the atlas regions of the active light. + * This way, one can check if the rendering, the copying and the shadow sampling functions works. + */ + DEBUG_SHADOW_SHADOW_DEPTH = 15u +}; + +/** \} */ + +/* -------------------------------------------------------------------- */ /** \name Sampling * \{ */ @@ -124,7 +177,7 @@ struct CameraData { float clip_far; eCameraType type; - bool initialized; + bool1 initialized; #ifdef __cplusplus /* Small constructor to allow detecting new buffers. */ @@ -239,6 +292,17 @@ static inline float film_filter_weight(float filter_radius, float sample_distanc /** \} */ /* -------------------------------------------------------------------- */ +/** \name Render passes + * \{ */ + +enum eRenderPassLayerIndex : uint32_t { + RENDER_PASS_LAYER_DIFFUSE_LIGHT = 0u, + RENDER_PASS_LAYER_SPECULAR_LIGHT = 1u, +}; + +/** \} */ + +/* -------------------------------------------------------------------- */ /** \name Arbitrary Output Variables * \{ */ @@ -312,6 +376,272 @@ BLI_STATIC_ASSERT_ALIGN(VelocityGeometryIndex, 16) /** \} */ /* -------------------------------------------------------------------- */ +/** \name Motion Blur + * \{ */ + +#define MOTION_BLUR_TILE_SIZE 32 +#define MOTION_BLUR_MAX_TILE 512 /* 16384 / MOTION_BLUR_TILE_SIZE */ +struct MotionBlurData { + /** As the name suggests. Used to avoid a division in the sampling. */ + float2 target_size_inv; + /** Viewport motion scaling factor. Make blur relative to frame time not render time. */ + float2 motion_scale; + /** Depth scaling factor. Avoid blurring background behind moving objects. */ + float depth_scale; + + float _pad0, _pad1, _pad2; +}; +BLI_STATIC_ASSERT_ALIGN(MotionBlurData, 16) + +/* For some reasons some GLSL compilers do not like this struct. + * So we declare it as a uint array instead and do indexing ourselves. */ +#ifdef __cplusplus +struct MotionBlurTileIndirection { + /** + * Stores indirection to the tile with the highest velocity covering each tile. + * This is stored using velocity in the MSB to be able to use atomicMax operations. + */ + uint prev[MOTION_BLUR_MAX_TILE][MOTION_BLUR_MAX_TILE]; + uint next[MOTION_BLUR_MAX_TILE][MOTION_BLUR_MAX_TILE]; +}; +BLI_STATIC_ASSERT_ALIGN(MotionBlurTileIndirection, 16) +#endif + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Depth of field + * \{ */ + +/* 5% error threshold. */ +#define DOF_FAST_GATHER_COC_ERROR 0.05 +#define DOF_GATHER_RING_COUNT 5 +#define DOF_DILATE_RING_COUNT 3 + +struct DepthOfFieldData { + /** Size of the render targets for gather & scatter passes. */ + int2 extent; + /** Size of a pixel in uv space (1.0 / extent). */ + float2 texel_size; + /** Scale factor for anisotropic bokeh. */ + float2 bokeh_anisotropic_scale; + float2 bokeh_anisotropic_scale_inv; + /* Correction factor to align main target pixels with the filtered mipmap chain texture. */ + float2 gather_uv_fac; + /** Scatter parameters. */ + float scatter_coc_threshold; + float scatter_color_threshold; + float scatter_neighbor_max_color; + int scatter_sprite_per_row; + /** Number of side the bokeh shape has. */ + float bokeh_blades; + /** Rotation of the bokeh shape. */ + float bokeh_rotation; + /** Multiplier and bias to apply to linear depth to Circle of confusion (CoC). */ + float coc_mul, coc_bias; + /** Maximum absolute allowed Circle of confusion (CoC). Min of computed max and user max. */ + float coc_abs_max; + /** Copy of camera type. */ + eCameraType camera_type; + /** Weights of spatial filtering in stabilize pass. Not array to avoid alignment restriction. */ + float4 filter_samples_weight; + float filter_center_weight; + /** Max number of sprite in the scatter pass for each ground. */ + int scatter_max_rect; + + int _pad0, _pad1; +}; +BLI_STATIC_ASSERT_ALIGN(DepthOfFieldData, 16) + +struct ScatterRect { + /** Color and CoC of the 4 pixels the scatter sprite represents. */ + float4 color_and_coc[4]; + /** Rect center position in half pixel space. */ + float2 offset; + /** Rect half extent in half pixel space. */ + float2 half_extent; +}; +BLI_STATIC_ASSERT_ALIGN(ScatterRect, 16) + +/** WORKAROUND(@fclem): This is because this file is included before common_math_lib.glsl. */ +#ifndef M_PI +# define EEVEE_PI +# define M_PI 3.14159265358979323846 /* pi */ +#endif + +static inline float coc_radius_from_camera_depth(DepthOfFieldData dof, float depth) +{ + depth = (dof.camera_type != CAMERA_ORTHO) ? 1.0f / depth : depth; + return dof.coc_mul * depth + dof.coc_bias; +} + +static inline float regular_polygon_side_length(float sides_count) +{ + return 2.0f * sinf(M_PI / sides_count); +} + +/* Returns intersection ratio between the radius edge at theta and the regular polygon edge. + * Start first corners at theta == 0. */ +static inline float circle_to_polygon_radius(float sides_count, float theta) +{ + /* From Graphics Gems from CryENGINE 3 (Siggraph 2013) by Tiago Sousa (slide + * 36). */ + float side_angle = (2.0f * M_PI) / sides_count; + return cosf(side_angle * 0.5f) / + cosf(theta - side_angle * floorf((sides_count * theta + M_PI) / (2.0f * M_PI))); +} + +/* Remap input angle to have homogenous spacing of points along a polygon edge. + * Expects theta to be in [0..2pi] range. */ +static inline float circle_to_polygon_angle(float sides_count, float theta) +{ + float side_angle = (2.0f * M_PI) / sides_count; + float halfside_angle = side_angle * 0.5f; + float side = floorf(theta / side_angle); + /* Length of segment from center to the middle of polygon side. */ + float adjacent = circle_to_polygon_radius(sides_count, 0.0f); + + /* This is the relative position of the sample on the polygon half side. */ + float local_theta = theta - side * side_angle; + float ratio = (local_theta - halfside_angle) / halfside_angle; + + float halfside_len = regular_polygon_side_length(sides_count) * 0.5f; + float opposite = ratio * halfside_len; + + /* NOTE: atan(y_over_x) has output range [-M_PI_2..M_PI_2]. */ + float final_local_theta = atanf(opposite / adjacent); + + return side * side_angle + final_local_theta; +} + +#ifdef EEVEE_PI +# undef M_PI +#endif + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Light Culling + * \{ */ + +/* Number of items we can cull. Limited by how we store CullingZBin. */ +#define CULLING_MAX_ITEM 65536 +/* Fine grained subdivision in the Z direction. Limited by the LDS in z-binning compute shader. */ +#define CULLING_ZBIN_COUNT 4096 +/* Max tile map resolution per axes. */ +#define CULLING_TILE_RES 16 + +struct LightCullingData { + /** Scale applied to tile pixel coordinates to get target UV coordinate. */ + float2 tile_to_uv_fac; + /** Scale and bias applied to linear Z to get zbin. */ + float zbin_scale; + float zbin_bias; + /** Valid item count in the source data array. */ + uint items_count; + /** Items that are processed by the 2.5D culling. */ + uint local_lights_len; + /** Items that are **NOT** processed by the 2.5D culling (i.e: Sun Lights). */ + uint sun_lights_len; + /** Number of items that passes the first culling test. */ + uint visible_count; + /** Extent of one square tile in pixels. */ + float tile_size; + /** Number of tiles on the X/Y axis. */ + uint tile_x_len; + uint tile_y_len; + /** Number of word per tile. Depends on the maximum number of lights. */ + uint tile_word_len; +}; +BLI_STATIC_ASSERT_ALIGN(LightCullingData, 16) + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Lights + * \{ */ + +#define LIGHT_NO_SHADOW -1 + +enum eLightType : uint32_t { + LIGHT_SUN = 0u, + LIGHT_POINT = 1u, + LIGHT_SPOT = 2u, + LIGHT_RECT = 3u, + LIGHT_ELLIPSE = 4u +}; + +static inline bool is_area_light(eLightType type) +{ + return type >= LIGHT_RECT; +} + +struct LightData { + /** Normalized object matrix. Last column contains data accessible using the following macros. */ + float4x4 object_mat; + /** Packed data in the last column of the object_mat. */ +#define _area_size_x object_mat[0][3] +#define _area_size_y object_mat[1][3] +#define _radius _area_size_x +#define _spot_mul object_mat[2][3] +#define _spot_bias object_mat[3][3] + /** Aliases for axes. */ +#ifndef USE_GPU_SHADER_CREATE_INFO +# define _right object_mat[0] +# define _up object_mat[1] +# define _back object_mat[2] +# define _position object_mat[3] +#else +# define _right object_mat[0].xyz +# define _up object_mat[1].xyz +# define _back object_mat[2].xyz +# define _position object_mat[3].xyz +#endif + /** Influence radius (inverted and squared) adjusted for Surface / Volume power. */ + float influence_radius_invsqr_surface; + float influence_radius_invsqr_volume; + /** Maximum influence radius. Used for culling. */ + float influence_radius_max; + /** Index of the shadow struct on CPU. -1 means no shadow. */ + int shadow_id; + /** NOTE: It is ok to use float3 here. A float is declared right after it. + * float3 is also aligned to 16 bytes. */ + float3 color; + /** Power depending on shader type. */ + float diffuse_power; + float specular_power; + float volume_power; + float transmit_power; + /** Special radius factor for point lighting. */ + float radius_squared; + /** Light Type. */ + eLightType type; + /** Spot angle tangent. */ + float spot_tan; + /** Spot size. Aligned to size of float2. */ + float2 spot_size_inv; + /** Associated shadow data. Only valid if shadow_id is not LIGHT_NO_SHADOW. */ + // ShadowData shadow_data; +}; +BLI_STATIC_ASSERT_ALIGN(LightData, 16) + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Hierarchical-Z Buffer + * \{ */ + +struct HiZData { + /** Scale factor to remove HiZBuffer padding. */ + float2 uv_scale; + + float2 _pad0; +}; +BLI_STATIC_ASSERT_ALIGN(HiZData, 16) + +/** \} */ + +/* -------------------------------------------------------------------- */ /** \name Ray-Tracing * \{ */ @@ -332,6 +662,34 @@ enum eClosureBits : uint32_t { /** \} */ /* -------------------------------------------------------------------- */ +/** \name Subsurface + * \{ */ + +#define SSS_SAMPLE_MAX 64 +#define SSS_BURLEY_TRUNCATE 16.0 +#define SSS_BURLEY_TRUNCATE_CDF 0.9963790093708328 +#define SSS_TRANSMIT_LUT_SIZE 64.0 +#define SSS_TRANSMIT_LUT_RADIUS 1.218 +#define SSS_TRANSMIT_LUT_SCALE ((SSS_TRANSMIT_LUT_SIZE - 1.0) / float(SSS_TRANSMIT_LUT_SIZE)) +#define SSS_TRANSMIT_LUT_BIAS (0.5 / float(SSS_TRANSMIT_LUT_SIZE)) +#define SSS_TRANSMIT_LUT_STEP_RES 64.0 + +struct SubsurfaceData { + /** xy: 2D sample position [-1..1], zw: sample_bounds. */ + /* NOTE(fclem) Using float4 for alignment. */ + float4 samples[SSS_SAMPLE_MAX]; + /** Sample index after which samples are not randomly rotated anymore. */ + int jitter_threshold; + /** Number of samples precomputed in the set. */ + int sample_len; + int _pad0; + int _pad1; +}; +BLI_STATIC_ASSERT_ALIGN(SubsurfaceData, 16) + +/** \} */ + +/* -------------------------------------------------------------------- */ /** \name Utility Texture * \{ */ @@ -370,7 +728,19 @@ float4 utility_tx_sample(sampler2DArray util_tx, float2 uv, float layer) using AOVsInfoDataBuf = draw::StorageBuffer<AOVsInfoData>; using CameraDataBuf = draw::UniformBuffer<CameraData>; +using DepthOfFieldDataBuf = draw::UniformBuffer<DepthOfFieldData>; +using DepthOfFieldScatterListBuf = draw::StorageArrayBuffer<ScatterRect, 16, true>; +using DrawIndirectBuf = draw::StorageBuffer<DrawCommand, true>; using FilmDataBuf = draw::UniformBuffer<FilmData>; +using HiZDataBuf = draw::UniformBuffer<HiZData>; +using LightCullingDataBuf = draw::StorageBuffer<LightCullingData>; +using LightCullingKeyBuf = draw::StorageArrayBuffer<uint, LIGHT_CHUNK, true>; +using LightCullingTileBuf = draw::StorageArrayBuffer<uint, LIGHT_CHUNK, true>; +using LightCullingZbinBuf = draw::StorageArrayBuffer<uint, CULLING_ZBIN_COUNT, true>; +using LightCullingZdistBuf = draw::StorageArrayBuffer<float, LIGHT_CHUNK, true>; +using LightDataBuf = draw::StorageArrayBuffer<LightData, LIGHT_CHUNK>; +using MotionBlurDataBuf = draw::UniformBuffer<MotionBlurData>; +using MotionBlurTileIndirectionBuf = draw::StorageBuffer<MotionBlurTileIndirection, true>; using SamplingDataBuf = draw::StorageBuffer<SamplingData>; using VelocityGeometryBuf = draw::StorageArrayBuffer<float4, 16, true>; using VelocityIndexBuf = draw::StorageArrayBuffer<VelocityIndex, 16>; |