Maniphest T71898

Grayscale BMP output files are 24-bit, not 8-bit
Closed, ResolvedTO DO
Actions

Assigned To
Campbell Barton (campbellbarton)
Authored By
Stephen Hart (sjhart)
Nov 25 2019, 6:58 PM
Tags
  • BF Blender
  • Render Pipeline
  • Import/Export
Subscribers
Campbell Barton (campbellbarton)
James Fulop (Yam)
Stephen Hart (sjhart)

Description

System Information
Operating system: Windows 10 Pro version 1909 build 18363.476
Graphics card: NVIDIA GeForce 940MX

Blender Version
Broken: 2.81

Short description of error
Properties > Output Properties > Output > File Format is set to BMP and Color is set to BW. Output files are BW, but file-size confirms they are actually 24-bit BMPs with identical content in each color channel. Not a huge problem, because I think almost any software that can read BMPs can read the 24-bit version. But it does triple the file size. And Blender can input 8-bit BMPs, so this is just an output issue.

Exact steps for others to reproduce the error
Minimal example blend file attached.

Related Objects

Mentioned In
D6471: reduce size of exported BW bmps, cleanup
T63728: Data, Assets & I/O Module
Mentioned Here
rBd8435596d5af: imbuf: support writing grayscale BMP images
D6471: reduce size of exported BW bmps, cleanup

Event Timeline

Stephen Hart (sjhart) created this task.Nov 25 2019, 6:58 PM
Maciej Jutrzenka (Kramon) added projects: Render Pipeline, Import/Export.Nov 25 2019, 8:43 PM
Campbell Barton (campbellbarton) renamed this task from BW BMP output files are 24-bit, not 8-bit to Grayscale BMP output files are 24-bit, not 8-bit.Nov 26 2019, 1:36 PM
Campbell Barton (campbellbarton) mentioned this in T63728: Data, Assets & I/O Module.
Campbell Barton (campbellbarton) edited a custom field.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

While we would accept patches to support this, it's not a bug, marking as TODO.

Campbell Barton (campbellbarton) lowered the priority of this task from 90 to Low.Nov 26 2019, 1:37 PM
James Fulop (Yam) mentioned this in D6471: reduce size of exported BW bmps, cleanup.Dec 22 2019, 9:52 PM
James Fulop (Yam) added a subscriber: James Fulop (Yam).Dec 22 2019, 9:55 PM

I took a stab at this https://developer.blender.org/D6471

Campbell Barton (campbellbarton) closed this task as Resolved.Jan 29 2020, 2:59 AM
Campbell Barton (campbellbarton) claimed this task.

Committed to master rBd8435596d5af: imbuf: support writing grayscale BMP images, closing.