diff options
Diffstat (limited to 'source/blender/draw/engines/eevee_next/eevee_motion_blur.cc')
| -rw-r--r-- | source/blender/draw/engines/eevee_next/eevee_motion_blur.cc | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee_next/eevee_motion_blur.cc b/source/blender/draw/engines/eevee_next/eevee_motion_blur.cc new file mode 100644 index 00000000000..660eb9f1e22 --- /dev/null +++ b/source/blender/draw/engines/eevee_next/eevee_motion_blur.cc @@ -0,0 +1,262 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2021 Blender Foundation. + */ + +/** \file + * \ingroup eevee + */ + +// #include "BLI_map.hh" +#include "DEG_depsgraph_query.h" + +#include "eevee_instance.hh" +#include "eevee_motion_blur.hh" +// #include "eevee_sampling.hh" +// #include "eevee_shader_shared.hh" +// #include "eevee_velocity.hh" + +namespace blender::eevee { + +/* -------------------------------------------------------------------- */ +/** \name MotionBlurModule + * + * \{ */ + +void MotionBlurModule::init() +{ + const Scene *scene = inst_.scene; + + enabled_ = (scene->eevee.flag & SCE_EEVEE_MOTION_BLUR_ENABLED) != 0; + + if (!enabled_) { + motion_blur_fx_enabled_ = false; + return; + } + + /* Take into account the steps needed for fx motion blur. */ + int steps_count = max_ii(1, scene->eevee.motion_blur_steps) * 2 + 1; + + time_steps_.resize(steps_count); + + initial_frame_ = scene->r.cfra; + initial_subframe_ = scene->r.subframe; + frame_time_ = initial_frame_ + initial_subframe_; + shutter_position_ = scene->eevee.motion_blur_position; + shutter_time_ = scene->eevee.motion_blur_shutter; + + data_.depth_scale = scene->eevee.motion_blur_depth_scale; + motion_blur_fx_enabled_ = true; /* TODO(fclem): UI option. */ + + /* Viewport stops here. We only do Post-FX motion blur. */ + if (inst_.is_viewport()) { + enabled_ = false; + return; + } + + /* Without this there is the possibility of the curve table not being allocated. */ + BKE_curvemapping_changed((struct CurveMapping *)&scene->r.mblur_shutter_curve, false); + + Vector<float> cdf(CM_TABLE); + Sampling::cdf_from_curvemapping(scene->r.mblur_shutter_curve, cdf); + Sampling::cdf_invert(cdf, time_steps_); + + for (float &time : time_steps_) { + time = this->shutter_time_to_scene_time(time); + } + + step_id_ = 1; + + if (motion_blur_fx_enabled_) { + /* A bit weird but we have to sync the first 2 steps here because the step() + * function is only called after rendering a sample. */ + inst_.velocity.step_sync(STEP_PREVIOUS, time_steps_[0]); + inst_.velocity.step_sync(STEP_NEXT, time_steps_[2]); + } + inst_.set_time(time_steps_[1]); +} + +/* Runs after rendering a sample. */ +void MotionBlurModule::step() +{ + if (!enabled_) { + return; + } + + if (inst_.sampling.finished()) { + /* Restore original frame number. This is because the render pipeline expects it. */ + RE_engine_frame_set(inst_.render, initial_frame_, initial_subframe_); + } + else if (inst_.sampling.do_render_sync()) { + /* Time to change motion step. */ + BLI_assert(time_steps_.size() > step_id_ + 2); + step_id_ += 2; + + if (motion_blur_fx_enabled_) { + inst_.velocity.step_swap(); + inst_.velocity.step_sync(eVelocityStep::STEP_NEXT, time_steps_[step_id_ + 1]); + } + inst_.set_time(time_steps_[step_id_]); + } +} + +float MotionBlurModule::shutter_time_to_scene_time(float time) +{ + switch (shutter_position_) { + case SCE_EEVEE_MB_START: + /* No offset. */ + break; + case SCE_EEVEE_MB_CENTER: + time -= 0.5f; + break; + case SCE_EEVEE_MB_END: + time -= 1.0; + break; + default: + BLI_assert(!"Invalid motion blur position enum!"); + break; + } + time *= shutter_time_; + time += frame_time_; + return time; +} + +void MotionBlurModule::sync() +{ + /* Disable motion blur in viewport when changing camera projection type. + * Avoids really high velocities. */ + if (inst_.velocity.camera_changed_projection()) { + motion_blur_fx_enabled_ = false; + } + + if (!motion_blur_fx_enabled_) { + return; + } + + eGPUSamplerState no_filter = GPU_SAMPLER_DEFAULT; + RenderBuffers &render_buffers = inst_.render_buffers; + + { + /* Create max velocity tiles. */ + DRW_PASS_CREATE(tiles_flatten_ps_, DRW_STATE_NO_DRAW); + eShaderType shader = (inst_.is_viewport()) ? MOTION_BLUR_TILE_FLATTEN_VIEWPORT : + MOTION_BLUR_TILE_FLATTEN_RENDER; + GPUShader *sh = inst_.shaders.static_shader_get(shader); + DRWShadingGroup *grp = DRW_shgroup_create(sh, tiles_flatten_ps_); + inst_.velocity.bind_resources(grp); + DRW_shgroup_uniform_block(grp, "motion_blur_buf", data_); + DRW_shgroup_uniform_texture_ref(grp, "depth_tx", &render_buffers.depth_tx); + DRW_shgroup_uniform_image_ref(grp, "velocity_img", &render_buffers.vector_tx); + DRW_shgroup_uniform_image_ref(grp, "out_tiles_img", &tiles_tx_); + + DRW_shgroup_call_compute_ref(grp, dispatch_flatten_size_); + DRW_shgroup_barrier(grp, GPU_BARRIER_SHADER_IMAGE_ACCESS | GPU_BARRIER_TEXTURE_FETCH); + } + { + /* Expand max velocity tiles by spreading them in their neighborhood. */ + DRW_PASS_CREATE(tiles_dilate_ps_, DRW_STATE_NO_DRAW); + GPUShader *sh = inst_.shaders.static_shader_get(MOTION_BLUR_TILE_DILATE); + DRWShadingGroup *grp = DRW_shgroup_create(sh, tiles_dilate_ps_); + DRW_shgroup_storage_block(grp, "tile_indirection_buf", tile_indirection_buf_); + DRW_shgroup_uniform_image_ref(grp, "in_tiles_img", &tiles_tx_); + + DRW_shgroup_call_compute_ref(grp, dispatch_dilate_size_); + DRW_shgroup_barrier(grp, GPU_BARRIER_SHADER_STORAGE); + } + { + /* Do the motion blur gather algorithm. */ + DRW_PASS_CREATE(gather_ps_, DRW_STATE_NO_DRAW); + GPUShader *sh = inst_.shaders.static_shader_get(MOTION_BLUR_GATHER); + DRWShadingGroup *grp = DRW_shgroup_create(sh, gather_ps_); + inst_.sampling.bind_resources(grp); + DRW_shgroup_uniform_block(grp, "motion_blur_buf", data_); + DRW_shgroup_storage_block(grp, "tile_indirection_buf", tile_indirection_buf_); + DRW_shgroup_uniform_texture_ref_ex(grp, "depth_tx", &render_buffers.depth_tx, no_filter); + DRW_shgroup_uniform_texture_ref_ex(grp, "velocity_tx", &render_buffers.vector_tx, no_filter); + DRW_shgroup_uniform_texture_ref_ex(grp, "in_color_tx", &input_color_tx_, no_filter); + DRW_shgroup_uniform_image_ref(grp, "in_tiles_img", &tiles_tx_); + DRW_shgroup_uniform_image_ref(grp, "out_color_img", &output_color_tx_); + + DRW_shgroup_call_compute_ref(grp, dispatch_gather_size_); + DRW_shgroup_barrier(grp, GPU_BARRIER_TEXTURE_FETCH); + } +} + +void MotionBlurModule::render(GPUTexture **input_tx, GPUTexture **output_tx) +{ + if (!motion_blur_fx_enabled_) { + return; + } + + const Texture &depth_tx = inst_.render_buffers.depth_tx; + + int2 extent = {depth_tx.width(), depth_tx.height()}; + int2 tiles_extent = math::divide_ceil(extent, int2(MOTION_BLUR_TILE_SIZE)); + + if (inst_.is_viewport()) { + float frame_delta = fabsf(inst_.velocity.step_time_delta_get(STEP_PREVIOUS, STEP_CURRENT)); + /* Avoid highly disturbing blurs, during navigation with high shutter time. */ + if (frame_delta > 0.0f && !DRW_state_is_navigating()) { + /* Rescale motion blur intensity to be shutter time relative and avoid long streak when we + * have frame skipping. Always try to stick to what the render frame would look like. */ + data_.motion_scale = float2(shutter_time_ / frame_delta); + } + else { + /* There is no time change. Motion only comes from viewport navigation and object transform. + * Apply motion blur as smoothing and only blur towards last frame. */ + data_.motion_scale = float2(1.0f, 0.0f); + + if (was_navigating_ != DRW_state_is_navigating()) { + /* Special case for navigation events that only last for one frame (for instance mouse + * scroll for zooming). For this case we have to wait for the next frame before enabling + * the navigation motion blur. */ + was_navigating_ = DRW_state_is_navigating(); + return; + } + } + was_navigating_ = DRW_state_is_navigating(); + + /* Change texture swizzling to avoid complexity in gather pass shader. */ + GPU_texture_swizzle_set(inst_.render_buffers.vector_tx, "rgrg"); + } + else { + data_.motion_scale = float2(1.0f); + } + /* Second motion vector is stored inverted. */ + data_.motion_scale.y = -data_.motion_scale.y; + data_.target_size_inv = 1.0f / float2(extent); + data_.push_update(); + + input_color_tx_ = *input_tx; + output_color_tx_ = *output_tx; + + dispatch_flatten_size_ = int3(tiles_extent, 1); + dispatch_dilate_size_ = int3(math::divide_ceil(tiles_extent, int2(MOTION_BLUR_GROUP_SIZE)), 1); + dispatch_gather_size_ = int3(math::divide_ceil(extent, int2(MOTION_BLUR_GROUP_SIZE)), 1); + + DRW_stats_group_start("Motion Blur"); + + tiles_tx_.acquire(tiles_extent, GPU_RGBA16F); + + GPU_storagebuf_clear_to_zero(tile_indirection_buf_); + + DRW_draw_pass(tiles_flatten_ps_); + DRW_draw_pass(tiles_dilate_ps_); + DRW_draw_pass(gather_ps_); + + tiles_tx_.release(); + + DRW_stats_group_end(); + + if (inst_.is_viewport()) { + /* Reset swizzle since this texture might be reused in other places. */ + GPU_texture_swizzle_set(inst_.render_buffers.vector_tx, "rgba"); + } + + /* Swap buffers so that next effect has the right input. */ + *input_tx = output_color_tx_; + *output_tx = input_color_tx_; +} + +/** \} */ + +} // namespace blender::eevee
\ No newline at end of file |