Fix T73188: RenderResult as Camera BG Image

In blender 2.79 you could use a render result as a camera background
image. This is useful during layout/compositing. During Blender 2.80
development there were 2 issues introduced that removed this feature.

* to receive a render result the image required a lock. This lock wasn't passed and therefore no image was read from the result. Generating an GPUTexture from an Blender image also didn't do the locking.
* the iuser->scene field wasn't set what is required for render results.

This change adds an optional `ibuf` parameter to `GPU_texture_from_blender` that can be passed when available.

Reviewed By: fclem, brecht

Differential Revision: https://developer.blender.org/D6684

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/draw/engines/workbench/workbench_forward.c b/source/blender/draw/engines/workbench/workbench_forward.c
index 3e8c12c0bef..4366c87678f 100644
--- a/source/blender/draw/engines/workbench/workbench_forward.c
+++ b/source/blender/draw/engines/workbench/workbench_forward.c
@@ -210,7 +210,8 @@ WORKBENCH_MaterialData *workbench_forward_get_or_create_material_data(WORKBENCH_
     if (color_type == V3D_SHADING_TEXTURE_COLOR) {
       material->shgrp_object_outline = DRW_shgroup_create(sh_data->object_outline_texture_sh,
                                                           psl->object_outline_pass);
-      GPUTexture *tex = GPU_texture_from_blender(material->ima, material->iuser, GL_TEXTURE_2D);
+      GPUTexture *tex = GPU_texture_from_blender(
+          material->ima, material->iuser, NULL, GL_TEXTURE_2D);
       DRW_shgroup_uniform_texture(material->shgrp_object_outline, "image", tex);
     }
     else {