diff options
Diffstat (limited to 'source/blender/draw/engines/eevee_next/eevee_hizbuffer.cc')
-rw-r--r-- | source/blender/draw/engines/eevee_next/eevee_hizbuffer.cc | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee_next/eevee_hizbuffer.cc b/source/blender/draw/engines/eevee_next/eevee_hizbuffer.cc new file mode 100644 index 00000000000..e2022d74093 --- /dev/null +++ b/source/blender/draw/engines/eevee_next/eevee_hizbuffer.cc @@ -0,0 +1,102 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2022 Blender Foundation. + */ + +#include "BKE_global.h" + +#include "eevee_instance.hh" + +#include "eevee_hizbuffer.hh" + +namespace blender::eevee { + +/* -------------------------------------------------------------------- */ +/** \name Hierarchical-Z buffer + * + * \{ */ + +void HiZBuffer::sync() +{ + RenderBuffers &render_buffers = inst_.render_buffers; + + int2 render_extent = inst_.film.render_extent_get(); + /* Padding to avoid complexity during down-sampling and screen tracing. */ + int2 hiz_extent = math::ceil_to_multiple(render_extent, int2(1u << (HIZ_MIP_COUNT - 1))); + int2 dispatch_size = math::divide_ceil(hiz_extent, int2(HIZ_GROUP_SIZE)); + + hiz_tx_.ensure_2d(GPU_R32F, hiz_extent, nullptr, HIZ_MIP_COUNT); + hiz_tx_.ensure_mip_views(); + GPU_texture_mipmap_mode(hiz_tx_, true, false); + + data_.uv_scale = float2(render_extent) / float2(hiz_extent); + data_.push_update(); + + { + hiz_update_ps_ = DRW_pass_create("HizUpdate", DRW_STATE_NO_DRAW); + GPUShader *sh = inst_.shaders.static_shader_get(HIZ_UPDATE); + DRWShadingGroup *grp = DRW_shgroup_create(sh, hiz_update_ps_); + DRW_shgroup_storage_block(grp, "finished_tile_counter", atomic_tile_counter_); + DRW_shgroup_uniform_texture_ref_ex(grp, "depth_tx", &render_buffers.depth_tx, with_filter); + DRW_shgroup_uniform_image(grp, "out_mip_0", hiz_tx_.mip_view(0)); + DRW_shgroup_uniform_image(grp, "out_mip_1", hiz_tx_.mip_view(1)); + DRW_shgroup_uniform_image(grp, "out_mip_2", hiz_tx_.mip_view(2)); + DRW_shgroup_uniform_image(grp, "out_mip_3", hiz_tx_.mip_view(3)); + DRW_shgroup_uniform_image(grp, "out_mip_4", hiz_tx_.mip_view(4)); + DRW_shgroup_uniform_image(grp, "out_mip_5", hiz_tx_.mip_view(5)); + DRW_shgroup_uniform_image(grp, "out_mip_6", hiz_tx_.mip_view(6)); + DRW_shgroup_uniform_image(grp, "out_mip_7", hiz_tx_.mip_view(7)); + /* TODO(@fclem): There might be occasions where we might not want to + * copy mip 0 for performance reasons if there is no need for it. */ + DRW_shgroup_uniform_bool_copy(grp, "update_mip_0", true); + DRW_shgroup_call_compute(grp, UNPACK2(dispatch_size), 1); + DRW_shgroup_barrier(grp, GPU_BARRIER_TEXTURE_FETCH); + } + + if (inst_.debug_mode == eDebugMode::DEBUG_HIZ_VALIDATION) { + DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_CUSTOM; + debug_draw_ps_ = DRW_pass_create("HizUpdate.Debug", state); + GPUShader *sh = inst_.shaders.static_shader_get(HIZ_DEBUG); + DRWShadingGroup *grp = DRW_shgroup_create(sh, debug_draw_ps_); + this->bind_resources(grp); + DRW_shgroup_call_procedural_triangles(grp, nullptr, 1); + } + else { + debug_draw_ps_ = nullptr; + } +} + +void HiZBuffer::update() +{ + if (!is_dirty_) { + return; + } + + /* Bind another framebuffer in order to avoid triggering the feedback loop check. + * This is safe because we only use compute shaders in this section of the code. + * Ideally the check should be smarter. */ + GPUFrameBuffer *fb = GPU_framebuffer_active_get(); + if (G.debug & G_DEBUG_GPU) { + GPU_framebuffer_restore(); + } + + DRW_draw_pass(hiz_update_ps_); + + if (G.debug & G_DEBUG_GPU) { + GPU_framebuffer_bind(fb); + } +} + +void HiZBuffer::debug_draw(GPUFrameBuffer *view_fb) +{ + if (debug_draw_ps_ == nullptr) { + return; + } + inst_.info = "Debug Mode: HiZ Validation"; + inst_.hiz_buffer.update(); + GPU_framebuffer_bind(view_fb); + DRW_draw_pass(debug_draw_ps_); +} + +/** \} */ + +} // namespace blender::eevee |