[Bf-blender-cvs] [139fb38d4fb] master: DRW: Add texture usage host read to Lightcache texture.

[Jason Fielder]

Commit: 139fb38d4fb4317a467a0abd28557f1713eb15af
Author: Jason Fielder
Date:   Mon Jan 23 17:46:28 2023 +0100
Branches: master
https://developer.blender.org/rB139fb38d4fb4317a467a0abd28557f1713eb15af

DRW: Add texture usage host read to Lightcache texture.

Required by Metal backend to have correct usage flags for textures which are read by host.

Authored by Apple: Michael Parkin-White

Ref T96261

Reviewed By: fclem

Maniphest Tasks: T96261

Differential Revision: https://developer.blender.org/D17020

===================================================================

M	source/blender/draw/engines/eevee/eevee_lightcache.c

===================================================================

diff --git a/source/blender/draw/engines/eevee/eevee_lightcache.c b/source/blender/draw/engines/eevee/eevee_lightcache.c
index b3b4b5a6dec..b28189973da 100644
--- a/source/blender/draw/engines/eevee/eevee_lightcache.c
+++ b/source/blender/draw/engines/eevee/eevee_lightcache.c
@@ -395,7 +395,8 @@ static bool eevee_lightcache_static_load(LightCache *lcache)
   }
 
   if (lcache->grid_tx.tex == NULL) {
-    eGPUTextureUsage usage = GPU_TEXTURE_USAGE_SHADER_READ | GPU_TEXTURE_USAGE_ATTACHMENT;
+    eGPUTextureUsage usage = GPU_TEXTURE_USAGE_SHADER_READ | GPU_TEXTURE_USAGE_ATTACHMENT |
+                             GPU_TEXTURE_USAGE_HOST_READ;
     lcache->grid_tx.tex = GPU_texture_create_2d_array_ex("lightcache_irradiance",
                                                          UNPACK3(lcache->grid_tx.tex_size),
                                                          1,