EEVEE: Deferred: Large refactor

This changes drastically the implementation to leverage arbitrary writes
in order to reduce complexity, memory usage and increase speed.

Since we are no longer dependent on the framebuffer requirement, we can
allocate bigger size texture that fits all views and avoid the extra.

Transparency, holdout and emissions are no longer deferred and are now
composited using dual source blending.

The indirect lighting and raytracing is still not functional but will
also gets a large refactor on its own

1 files changed, 2 insertions, 4 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_light.cc b/source/blender/draw/engines/eevee/eevee_light.cc
index a75417ac0b7..fa7b5812d17 100644
--- a/source/blender/draw/engines/eevee/eevee_light.cc
+++ b/source/blender/draw/engines/eevee/eevee_light.cc
@@ -393,7 +393,7 @@ void LightModule::debug_end_sync(void)
   DRW_shgroup_storage_block_ref(grp, "lights_cull_buf", &culling_data);
   DRW_shgroup_storage_block_ref(grp, "lights_zbin_buf", &culling_zbin_buf);
   DRW_shgroup_storage_block_ref(grp, "lights_tile_buf", &culling_tile_buf);
-  DRW_shgroup_uniform_texture_ref(grp, "depth_tx", &input_depth_tx_);
+  DRW_shgroup_uniform_texture_ref(grp, "hiz_tx", inst_.hiz_front.texture_ref_get());
   DRW_shgroup_call_procedural_triangles(grp, nullptr, 1);
 }
 
@@ -444,13 +444,11 @@ void LightModule::set_view(const DRWView *view,
   DRW_draw_pass(culling_ps_);
 }
 
-void LightModule::debug_draw(GPUFrameBuffer *view_fb, HiZBuffer &hiz)
+void LightModule::debug_draw(GPUFrameBuffer *view_fb)
 {
   if (debug_draw_ps_ == nullptr) {
     return;
   }
-  input_depth_tx_ = hiz.texture_get();
-
   GPU_framebuffer_bind(view_fb);
   DRW_draw_pass(debug_draw_ps_);
 }