[Bf-blender-cvs] [d70ef8dbf12] master: Fix Cycles Hydra segmentation fault in usdview

[Thomas Lindemeier]

Commit: d70ef8dbf1230a4d3b5d7cf8441053ab4bcb02ed
Author: Thomas Lindemeier
Date:   Tue Oct 18 13:44:36 2022 +0200
Branches: master
https://developer.blender.org/rBd70ef8dbf1230a4d3b5d7cf8441053ab4bcb02ed

Fix Cycles Hydra segmentation fault in usdview

Ensure render buffer is allocated when calling WritePixels.

Differential Revision: https://developer.blender.org/D16272

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

M	intern/cycles/hydra/output_driver.cpp

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

diff --git a/intern/cycles/hydra/output_driver.cpp b/intern/cycles/hydra/output_driver.cpp
index f4ea853f243..3bef8a011b9 100644
--- a/intern/cycles/hydra/output_driver.cpp
+++ b/intern/cycles/hydra/output_driver.cpp
@@ -55,12 +55,13 @@ bool HdCyclesOutputDriver::update_render_tile(const Tile &tile)
           const bool isId = aovBinding.aovName == HdAovTokens->primId ||
                             aovBinding.aovName == HdAovTokens->elementId ||
                             aovBinding.aovName == HdAovTokens->instanceId;
-
+          renderBuffer->Map();
           renderBuffer->WritePixels(pixels.data(),
                                     GfVec2i(tile.offset.x, tile.offset.y),
                                     GfVec2i(tile.size.x, tile.size.y),
                                     channels,
                                     isId);
+          renderBuffer->Unmap();
         }
         else {
           // Do not warn on missing elementId, which is a standard AOV but is not implememted