SDL2 texture blend help

[Martin Drašar]

Dne 13.12.2017 v 4:03 Ivan Trombley via Digitalmars-d napsal(a):
> On Wednesday, 13 December 2017 at 01:44:33 UTC, Dmitry wrote:
>> On Tuesday, 12 December 2017 at 23:28:23 UTC, Ivan Trombley wrote:
>>> Here's the code that produces the correct results (exactly the same
>>> as GIMP):
>> Share images you used, please.
> 
> Background image:
> http://a4.pbase.com/o10/09/605909/1/166706859.XKZZCnSO.background.png
> 
> Foreground image:
> http://a4.pbase.com/o10/09/605909/1/166706860.c1yD4VWp.image.png
> 
> Composited through SDL:
> http://a4.pbase.com/o10/09/605909/1/166706869.wLt9RofY.sdl.png
> 
> Composited in GIMP 2.9:
> http://a4.pbase.com/o10/09/605909/1/166706870.S01BIhVG.gimp.png
> 
> When composited using the code I posted looks exactly like the GIMP 2.9
> image.

I am not sure, about the tool you use to view the images, but on my side
(Firefox browser) the sdl and gimp output are very different. Maybe some
gamma shenanigans going on? Maybe related to PNG Gamma correction...