0005716: Implement RGTC compressor - The Dark Mod Bugtracker

ID	Project	Category	View Status	Date Submitted	Last Update

0005716	The Dark Mod	Coding	public	18.08.2021 10:59	30.01.2022 20:57

Reporter	stgatilov	Assigned To	stgatilov
Priority	normal	Severity	normal	Reproducibility	N/A
Status	resolved	Resolution	fixed
Product Version	TDM 2.09
Target Version	TDM 2.10	Fixed in Version	TDM 2.10

Summary	0005716: Implement RGTC compressor
Description	It seems that some driver implementations ot RGBA8 -> RGTC are slow. In case of Intel, it is even buggy (well, bug happens after doing glGenerateMipmap on RGTC-compressed texture). One way to avoid converting all normal maps into precompressed RGTC DDS files is to implement fast software compressor.
Additional Information	Original discussion: https://forums.thedarkmod.com/index.php?/topic/20115-convert-normal-maps-to-rgtc/&do=findComment&comment=463962
Tags	No tags attached.

stgatilov 19.08.2021 06:55 administrator ~0014304	Committed the code for software mipmap generation and RGTC compression, enabled by default: r9558. Function R_MipMap is accelerated by SSE2. r9560. Refactoring idImage: cpuData now contains only RGBA8 data, compressed texture is stored in new compressedData member. r9561. Added CompressRGTCFromRGBA8 method to idSIMD. r9562. Added R_HandleImageCompression function which does RGTC compression to normal maps. This requires a bit of refactoring (r9560), so that we could compress on worked thread, and upload that data on OpenGL thread.

stgatilov 28.08.2021 16:57 administrator ~0014319	One more fix: r9578. Fixed out-of-bounds access in ConvertTargaRowToRGBA8. for this issue: https://forums.thedarkmod.com/index.php?/topic/21073-a-house-of-locked-secrets-crashes-tdm-on-startup/&do=findComment&comment=464675

Date Modified	Username	Field	Change
18.08.2021 10:59	stgatilov	New Issue
18.08.2021 10:59	stgatilov	Status	new => assigned
18.08.2021 10:59	stgatilov	Assigned To	=> stgatilov
18.08.2021 10:59	stgatilov	Relationship added	related to 0004364
18.08.2021 16:06	nbohr1more	Relationship added	related to 0004401
19.08.2021 06:55	stgatilov	Note Added: 0014304
19.08.2021 06:55	stgatilov	Status	assigned => feedback
28.08.2021 16:57	stgatilov	Note Added: 0014319
30.01.2022 20:57	nbohr1more	Status	feedback => resolved
30.01.2022 20:57	nbohr1more	Resolution	open => fixed
30.01.2022 20:57	nbohr1more	Fixed in Version	=> TDM 2.10

related to	0004364	resolved	stgatilov	RGTC Normal Map compression
related to	0004401	resolved	duzenko	Faster texture loading via native OpenGL Mipmap Generation