Regression: Image Editor / UV window, image display no longer updates in view when image data is changed from script #98321

New Issue

Valera Barashkov · 2022-05-22T20:38:17+02:00

Valera Barashkov commented

2022-05-22 20:38:17 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.77

Blender Version
Broken: version: 3.2.0 Alpha, branch: master, commit date: 2022-04-05 23:33, hash: 931ae424b9
Worked: 3.0.1

Short description of error

bug image (1).mp4

Here it is working in 3.0:
bug image .mp4

Exact steps for others to reproduce the error
Set UI like in the video. Make sure to have an image and set the index in the script. Run script. Notice you have to drag / zoom in the image editor for the image to update.

import bpy

img_index = 0 # set image index

pixels = bpy.data.images[img_index].pixels

# just a safety so Blender dont freeze
if len(pixels) > 300*300*4:
    raise Exception("Image will take a long time! Use smaller size")

# change alpha / color
for i in range(len(pixels)):
    pixels[i] = 0

# this no longer works in 3.1, 3.2
bpy.data.images[img_index].update()

# not usually necessary, but just in case..
for area in bpy.context.window.screen.areas:
    if area.type == 'UV' or area.type == 'IMAGE_EDITOR':
        bpy.context.window.screen.areas[5].tag_redraw()

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.77 **Blender Version** Broken: version: 3.2.0 Alpha, branch: master, commit date: 2022-04-05 23:33, hash: `931ae424b9` Worked: 3.0.1 **Short description of error** [bug image (1).mp4](https://archive.blender.org/developer/F13097999/bug_image___1_.mp4) Here it is working in 3.0: [bug image .mp4](https://archive.blender.org/developer/F13097973/bug_image_.mp4) **Exact steps for others to reproduce the error** Set UI like in the video. Make sure to have an image and set the index in the script. Run script. Notice you have to drag / zoom in the image editor for the image to update. ``` import bpy img_index = 0 # set image index pixels = bpy.data.images[img_index].pixels # just a safety so Blender dont freeze if len(pixels) > 300*300*4: raise Exception("Image will take a long time! Use smaller size") # change alpha / color for i in range(len(pixels)): pixels[i] = 0 # this no longer works in 3.1, 3.2 bpy.data.images[img_index].update() # not usually necessary, but just in case.. for area in bpy.context.window.screen.areas: if area.type == 'UV' or area.type == 'IMAGE_EDITOR': bpy.context.window.screen.areas[5].tag_redraw() ```

Valera Barashkov commented

2022-05-22 20:38:17 +02:00

Added subscriber: @valera-8

Jesse Yurkovich commented

2022-05-23 00:18:34 +02:00

Added subscriber: @deadpin

Jesse Yurkovich commented

2022-05-23 00:18:34 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Jesse Yurkovich commented

2022-05-23 00:18:34 +02:00

Confirmed: rna_Image_update is missing a call to BKE_image_partial_update_mark_full_update(image); which will solve this bug.

Anecdotally, rna_Image_scale / BKE_image_scale are also missing some form of image / editor update but their solution is somewhat different and not a recent regression. Would be good to fix that api though too.

Confirmed: `rna_Image_update` is missing a call to `BKE_image_partial_update_mark_full_update(image);` which will solve this bug. Anecdotally, `rna_Image_scale / BKE_image_scale` are also missing some form of image / editor update but their solution is somewhat different and not a recent regression. Would be good to fix that api though too.

Jeroen Bakker commented

2022-05-23 07:54:32 +02:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker self-assigned this 2022-05-23 07:54:32 +02:00

Jeroen Bakker commented

2022-05-23 07:54:32 +02:00

@deadpin, thanks for checking. Will update the rna_Image_update.