Kévin Dietrich
cd968a3273
This adds support to render Curves attributes in EEVEE. Each attribute is stored in a texture derived from a VBO. As the shading group needs the textures to be valid upon creation, the attributes are created and setup during its very creation, instead of doing it lazily via create_requested which we cannot rely on anyway as contrary to the mesh batch, we do cannot really tell if attributes need to be updated or else via some `DRW_batch_requested`. Since point attributes need refinement, and since attributes are all cast to vec4/float4 to account for differences in type conversions between Blender and OpenGL, the refinement shader for points is used as is. The point attributes are stored for each subdivision level in CurvesEvalFinalCache. Each subdivision level also keeps track of the attributes already in use so they are properly updated when needed. Some basic garbage collection was added similar to what is done for meshes: if the attributes used over time have been different from the currently used attributes for too long, then the buffers are freed, ensuring that stale attributesare removed. This adds `CurvesInfos` to the shader creation info, which stores the scope in which the attributes are defined. Scopes are stored as booleans, in an array indexed by attribute loading order which is also the order in which the attributes were added to the material. A mapping is necessary between the indices used for the scoping, and the ones used in the Curves cache, as this may contain stale attributes which have not been garbage collected yet. Common utilities with the mesh code for handling requested attributes were moved to a separate file. Differential Revision: https://developer.blender.org/D14916
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef GPU_SHADER
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# include "GPU_shader.h"
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# include "GPU_shader_shared_utils.h"
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typedef struct ViewInfos ViewInfos;
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typedef struct ObjectMatrices ObjectMatrices;
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typedef struct ObjectInfos ObjectInfos;
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typedef struct VolumeInfos VolumeInfos;
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typedef struct CurvesInfos CurvesInfos;
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#endif
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#define DRW_SHADER_SHARED_H
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#define DRW_RESOURCE_CHUNK_LEN 512
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/* Define the maximum number of grid we allow in a volume UBO. */
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#define DRW_GRID_PER_VOLUME_MAX 16
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/* Define the maximum number of attribute we allow in a curves UBO.
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* This should be kept in sync with `GPU_ATTR_MAX` */
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#define DRW_ATTRIBUTE_PER_CURVES_MAX 15
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struct ViewInfos {
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/* View matrices */
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float4x4 persmat;
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float4x4 persinv;
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float4x4 viewmat;
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float4x4 viewinv;
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float4x4 winmat;
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float4x4 wininv;
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float4 clip_planes[6];
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float4 viewvecs[2];
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/* Should not be here. Not view dependent (only main view). */
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float4 viewcamtexcofac;
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float2 viewport_size;
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float2 viewport_size_inverse;
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/** Frustum culling data. */
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/** NOTE: vec3 arrays are padded to vec4. */
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float4 frustum_corners[8];
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float4 frustum_planes[6];
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};
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BLI_STATIC_ASSERT_ALIGN(ViewInfos, 16)
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/* Do not override old definitions if the shader uses this header but not shader info. */
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#ifdef USE_GPU_SHADER_CREATE_INFO
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/* TODO(@fclem): Mass rename. */
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# define ViewProjectionMatrix drw_view.persmat
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# define ViewProjectionMatrixInverse drw_view.persinv
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# define ViewMatrix drw_view.viewmat
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# define ViewMatrixInverse drw_view.viewinv
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# define ProjectionMatrix drw_view.winmat
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# define ProjectionMatrixInverse drw_view.wininv
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# define clipPlanes drw_view.clip_planes
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# define ViewVecs drw_view.viewvecs
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# define CameraTexCoFactors drw_view.viewcamtexcofac
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#endif
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struct ObjectMatrices {
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float4x4 drw_modelMatrix;
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float4x4 drw_modelMatrixInverse;
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};
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BLI_STATIC_ASSERT_ALIGN(ViewInfos, 16)
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struct ObjectInfos {
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float4 drw_OrcoTexCoFactors[2];
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float4 drw_ObjectColor;
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float4 drw_Infos;
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};
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BLI_STATIC_ASSERT_ALIGN(ViewInfos, 16)
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struct VolumeInfos {
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/* Object to grid-space. */
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float4x4 grids_xform[DRW_GRID_PER_VOLUME_MAX];
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/* NOTE: vec4 for alignment. Only float3 needed. */
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float4 color_mul;
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float density_scale;
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float temperature_mul;
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float temperature_bias;
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float _pad;
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};
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BLI_STATIC_ASSERT_ALIGN(VolumeInfos, 16)
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struct CurvesInfos {
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/* Per attribute scope, follows loading order.
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* NOTE: uint as bool in GLSL is 4 bytes. */
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uint is_point_attribute[DRW_ATTRIBUTE_PER_CURVES_MAX];
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int _pad;
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};
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BLI_STATIC_ASSERT_ALIGN(CurvesInfos, 16)
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#define OrcoTexCoFactors (drw_infos[resource_id].drw_OrcoTexCoFactors)
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#define ObjectInfo (drw_infos[resource_id].drw_Infos)
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#define ObjectColor (drw_infos[resource_id].drw_ObjectColor)
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