diff options
Diffstat (limited to 'source/blender/draw/engines/eevee_next/eevee_hizbuffer.hh')
-rw-r--r-- | source/blender/draw/engines/eevee_next/eevee_hizbuffer.hh | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee_next/eevee_hizbuffer.hh b/source/blender/draw/engines/eevee_next/eevee_hizbuffer.hh new file mode 100644 index 00000000000..039f7e4f16d --- /dev/null +++ b/source/blender/draw/engines/eevee_next/eevee_hizbuffer.hh @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2021 Blender Foundation. + */ + +/** \file + * \ingroup eevee + * + * The Hierarchical-Z buffer is texture containing a copy of the depth buffer with mipmaps. + * Each mip contains the maximum depth of each 4 pixels on the upper level. + * The size of the texture is padded to avoid messing with the mipmap pixels alignments. + */ + +#pragma once + +#include "DRW_render.h" + +#include "eevee_shader_shared.hh" + +namespace blender::eevee { + +class Instance; + +/* -------------------------------------------------------------------- */ +/** \name Hierarchical-Z buffer + * \{ */ + +class HiZBuffer { + private: + Instance &inst_; + + /** The texture containing the hiz mip chain. */ + Texture hiz_tx_ = {"hiz_tx_"}; + /** + * Atomic counter counting the number of tile that have finished down-sampling. + * The last one will process the last few mip level. + */ + draw::StorageBuffer<uint4, true> atomic_tile_counter_ = {"atomic_tile_counter"}; + /** Single pass recursive downsample. */ + DRWPass *hiz_update_ps_ = nullptr; + /** Debug pass. */ + DRWPass *debug_draw_ps_ = nullptr; + /** Dirty flag to check if the update is necessary. */ + bool is_dirty_ = true; + + HiZDataBuf data_; + + public: + HiZBuffer(Instance &inst) : inst_(inst) + { + atomic_tile_counter_.clear_to_zero(); + }; + + void sync(); + + /** + * Tag the buffer for update if needed. + */ + void set_dirty() + { + is_dirty_ = true; + } + + /** + * Update the content of the HiZ buffer with the depth render target. + * Noop if the buffer has not been tagged as dirty. + * Should be called before each passes that needs to read the hiz buffer. + */ + void update(); + + void debug_draw(GPUFrameBuffer *view_fb); + + void bind_resources(DRWShadingGroup *grp) + { + DRW_shgroup_uniform_texture_ref(grp, "hiz_tx", &hiz_tx_); + DRW_shgroup_uniform_block_ref(grp, "hiz_buf", &data_); + } +}; + +/** \} */ + +} // namespace blender::eevee |