100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2022 Blender Foundation.
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*/
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#include "BKE_global.h"
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#include "eevee_instance.hh"
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#include "eevee_hizbuffer.hh"
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namespace blender::eevee {
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/* -------------------------------------------------------------------- */
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/** \name Hierarchical-Z buffer
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*
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* \{ */
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void HiZBuffer::sync()
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{
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RenderBuffers &render_buffers = inst_.render_buffers;
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int2 render_extent = inst_.film.render_extent_get();
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/* Padding to avoid complexity during down-sampling and screen tracing. */
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int2 hiz_extent = math::ceil_to_multiple(render_extent, int2(1u << (HIZ_MIP_COUNT - 1)));
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int2 dispatch_size = math::divide_ceil(hiz_extent, int2(HIZ_GROUP_SIZE));
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hiz_tx_.ensure_2d(GPU_R32F, hiz_extent, nullptr, HIZ_MIP_COUNT);
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hiz_tx_.ensure_mip_views();
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GPU_texture_mipmap_mode(hiz_tx_, true, false);
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data_.uv_scale = float2(render_extent) / float2(hiz_extent);
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data_.push_update();
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{
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hiz_update_ps_.init();
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hiz_update_ps_.shader_set(inst_.shaders.static_shader_get(HIZ_UPDATE));
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hiz_update_ps_.bind_ssbo("finished_tile_counter", atomic_tile_counter_);
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hiz_update_ps_.bind_texture("depth_tx", &render_buffers.depth_tx, with_filter);
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hiz_update_ps_.bind_image("out_mip_0", hiz_tx_.mip_view(0));
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hiz_update_ps_.bind_image("out_mip_1", hiz_tx_.mip_view(1));
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hiz_update_ps_.bind_image("out_mip_2", hiz_tx_.mip_view(2));
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hiz_update_ps_.bind_image("out_mip_3", hiz_tx_.mip_view(3));
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hiz_update_ps_.bind_image("out_mip_4", hiz_tx_.mip_view(4));
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hiz_update_ps_.bind_image("out_mip_5", hiz_tx_.mip_view(5));
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hiz_update_ps_.bind_image("out_mip_6", hiz_tx_.mip_view(6));
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hiz_update_ps_.bind_image("out_mip_7", hiz_tx_.mip_view(7));
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/* TODO(@fclem): There might be occasions where we might not want to
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* copy mip 0 for performance reasons if there is no need for it. */
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hiz_update_ps_.push_constant("update_mip_0", true);
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hiz_update_ps_.dispatch(int3(dispatch_size, 1));
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hiz_update_ps_.barrier(GPU_BARRIER_TEXTURE_FETCH);
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}
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if (inst_.debug_mode == eDebugMode::DEBUG_HIZ_VALIDATION) {
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debug_draw_ps_.init();
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debug_draw_ps_.state_set(DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_CUSTOM);
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debug_draw_ps_.shader_set(inst_.shaders.static_shader_get(HIZ_DEBUG));
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this->bind_resources(&debug_draw_ps_);
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debug_draw_ps_.draw_procedural(GPU_PRIM_TRIS, 1, 3);
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}
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}
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void HiZBuffer::update()
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{
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if (!is_dirty_) {
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return;
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}
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/* Bind another framebuffer in order to avoid triggering the feedback loop check.
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* This is safe because we only use compute shaders in this section of the code.
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* Ideally the check should be smarter. */
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GPUFrameBuffer *fb = GPU_framebuffer_active_get();
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if (G.debug & G_DEBUG_GPU) {
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GPU_framebuffer_restore();
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}
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inst_.manager->submit(hiz_update_ps_);
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if (G.debug & G_DEBUG_GPU) {
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GPU_framebuffer_bind(fb);
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}
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}
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void HiZBuffer::debug_draw(View &view, GPUFrameBuffer *view_fb)
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{
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if (inst_.debug_mode == eDebugMode::DEBUG_HIZ_VALIDATION) {
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inst_.info =
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"Debug Mode: HiZ Validation\n"
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" - Red: pixel in front of HiZ tile value.\n"
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" - Blue: No error.";
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inst_.hiz_buffer.update();
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GPU_framebuffer_bind(view_fb);
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inst_.manager->submit(debug_draw_ps_, view);
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}
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}
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/** \} */
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} // namespace blender::eevee
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