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, 1 insertions, 1 deletions

diff --git a/source/blender/draw/engines/overlay/overlay_paint.c b/source/blender/draw/engines/overlay/overlay_paint.c
index 047659fbeee..e88a69b695e 100644
--- a/source/blender/draw/engines/overlay/overlay_paint.c
+++ b/source/blender/draw/engines/overlay/overlay_paint.c
@@ -85,7 +85,7 @@ void OVERLAY_paint_cache_init(OVERLAY_Data *vedata)
         state = DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_EQUAL | DRW_STATE_BLEND_ALPHA;
         DRW_PASS_CREATE(psl->paint_color_ps, state | pd->clipping_state);
 
-        GPUTexture *tex = GPU_texture_from_blender(imapaint->stencil, NULL, GL_TEXTURE_2D);
+        GPUTexture *tex = GPU_texture_from_blender(imapaint->stencil, NULL, NULL, GL_TEXTURE_2D);
 
         const bool mask_premult = (imapaint->stencil->alpha_mode == IMA_ALPHA_PREMUL);
         const bool mask_inverted = (imapaint->flag & IMAGEPAINT_PROJECT_LAYER_STENCIL_INV) != 0;