EEVEE: LightCache: Prevent crash when using a lightcache too big

Some implementation have different maximum texture size.
This patch avoid crash when texture allocation fails when:
- trying to bake a lightcache too big for the OpenGL imeplementaion.
- loading a cache from file that is too big for the OpenGL imeplementation.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/editors/render/render_shading.c b/source/blender/editors/render/render_shading.c
index 536252f5003..711f89b9fda 100644
--- a/source/blender/editors/render/render_shading.c
+++ b/source/blender/editors/render/render_shading.c
@@ -945,6 +945,11 @@ static int light_cache_bake_modal(bContext *C, wmOperator *op, const wmEvent *ev
 
   /* no running blender, remove handler and pass through */
   if (0 == WM_jobs_test(CTX_wm_manager(C), scene, WM_JOB_TYPE_RENDER)) {
+    LightCache *lcache = scene->eevee.light_cache_data;
+    if (lcache && (lcache->flag & LIGHTCACHE_INVALID)) {
+      BKE_report(op->reports, RPT_ERROR, "Lightcache cannot allocate resources");
+      return OPERATOR_CANCELLED;
+    }
     return OPERATOR_FINISHED | OPERATOR_PASS_THROUGH;
   }