Workbench: Depth Of Field: Optimisation

- Compute samples positions on CPU.
- Use 3x3 Box blur instead of 2x2.
- Implement bokeh parameters.

With this commit, dof performance is almost negligeable.
The quality is a bit lower than before but can be improve. Also now big
Circle of confusion are supported (up to 200px).
Cost is ~1.25ms on AMD Vega with a 2560p viewport than full HD and
pretty shallow depth of field.

Coc downsampling and dilation is not used anymore for now (commented).

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/draw/engines/workbench/workbench_private.h b/source/blender/draw/engines/workbench/workbench_private.h
index 62622b56805..ef114370587 100644
--- a/source/blender/draw/engines/workbench/workbench_private.h
+++ b/source/blender/draw/engines/workbench/workbench_private.h
@@ -115,6 +115,7 @@ typedef struct WORKBENCH_TextureList {
 typedef struct WORKBENCH_StorageList {
 	struct WORKBENCH_PrivateData *g_data;
 	struct WORKBENCH_EffectInfo *effects;
+	float *dof_ubo_data;
 } WORKBENCH_StorageList;
 
 typedef struct WORKBENCH_PassList {
@@ -239,10 +240,14 @@ typedef struct WORKBENCH_PrivateData {
 	struct GPUTexture *coc_halfres_tx;
 	struct GPUTexture *coc_temp_tx;
 	struct GPUTexture *coc_tiles_tx[2];
+	struct GPUUniformBuffer *dof_ubo;
 	float dof_aperturesize;
 	float dof_distance;
 	float dof_invsensorsize;
 	float dof_near_far[2];
+	float dof_blades;
+	float dof_rotation;
+	float dof_ratio;
 	bool dof_enabled;
 
 	/* Color Management */