SGI decoder corrupts high bit depth images encoded with RLE

Originator:vittorio.giovara
Number:rdar://23620553 Date Originated:20/11/2015
Status:Open Resolved:
Product:Quicktime Product Version:
Classification:Serious bug Reproducible:Always
 
Summary:
It looks like Preview and derivatives cannot decode correctly high bit depth RLE encoded SGI images. I analyzed the problem and found the solution: it looks like the decoder is reading the value of the run-code as little-endian, while any numeric value should be treated always as big-endian (as mandated by the specifications). The raw copy of the RLE decoding correctly reads values as big-endian.

Steps to Reproduce:
Open one of the images attached ending in "_rle", they are image which are not displayed correctly.

Expected Results:
Open one of the images attached ending in "_dec", they are how images should appear.

Actual Results:


Version:
QuickTime Version 10.3 (727.4)
OSX 10.9.5 (13F1134)

Notes:
The following conventions are used:
- gray16: 1 component, 16 bits each, Y16
- rgb48: 3 components, 16 bits each, R16G16B16
- rgba64: 4 components, 16 bits each, R16G16B16A16

Configuration:


Attachments:
'images_sgi-rle.zip' was successfully uploaded.

Comments


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