[Development] qdds image format

Konstantin Tokarev annulen at yandex.ru
Tue Apr 17 16:35:44 CEST 2018

17.04.2018, 17:33, "Иван Комиссаров" <abbapoh at gmail.com>:
> At the point i wrote the plugin, my usecase was simple - to convert plain QImages to and from DDS icons (used in starcraft2, which uses quite a few formats DDS can handle).
> But yes, i forgot floating point textures.
> Compressed textures (DXTN/ATI2) are just compressed (a)rgb32, nobody uses compressed jpeg, it is decompressed before usage (correct me if i'm wrong, but videocards uses DDS because it's decompression algorithm can be easily implemented in hardware)

FWIW, hardware decoding of JPEG is usually supported by devices featuring hardware video decoding support.

> 2018-04-17 14:28 GMT+03:00 Giuseppe D'Angelo <giuseppe.dangelo at kdab.com>:
>> On 17/04/18 13:21, Иван Комиссаров wrote:
>> Ok, there's another problem with QImage - ARGB64 and friends... This can be solved adding QImage::pixel64() or something like that... or use QTexture with 64bit "pixel"
>> And a bunch of packed formats not currently supported, and floating point channels, and compressed texture formats. I stand my point: DDS files are not meant to be handled by QImage.
>> What is your use case exactly for wanting this support?
>> Cheers,
>> --
>> Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
>> KDAB (France) S.A.S., a KDAB Group company
>> Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
>> KDAB - The Qt, C++ and OpenGL Experts
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