can you check if attached patch fixes subtract mode or makes it even more broken? вс, 30 окт. 2022 г., 20:58 Andrew Randrianasulu <[email protected]>:
вс, 30 окт. 2022 г., 17:21 Phyllis Smith <[email protected]>:
The below is very possible (except for the gimp comparison) meaning we may be making black where it should be white. But as Andrew implied old projects may suddenly provide different unexpected results if we change it.
I think you see, we are making black areas where gimp was making white areas...
or may be i get layers order wrong /
Much work was performed to follow one of many versions of the Overlays from various other software packages. In the Description section of the Overlays chapter in the manual, it states: Divide: Divides source color by destination color. If the source color is white, the result color is the underlying color. The resulting image is often lighter. *Mathformula used is different than that used by Gimp*; there is no SVG equivalent. https://cinelerra-gg.org/download/CinelerraGG_Manual/Arithmetic_Group.html
I believe that CinGG when rewriting the code several years ago attempted to follow the algorithm that currently existed in Cinelerra HV version at the time, but the image I had included earlier comparing CinGG with HV 4.6.1 is so different. One or the other is inconsistent. Changing it to match Gimp is not desirable, however it would be great to fix an obvious bug.
I found some python description of Adobe's blend modes .... also, blending and compositing can be two stages of more complex process??
https://github.com/psd-tools/image-blender/blob/master/src/image_blender.pyx
see divide/subtract grouped together ...
On Sun, Oct 30, 2022 at 1:59 AM Andrew Randrianasulu via Cin < [email protected]> wrote:
but should we blindly follow gimp ? Again, gimp tend to have bigger mode list ) may be right thing to do is leave some of our modes intact (they might be buggy but graphics art can utilize that, too) and add gimp/svg/oldcin compatible modes ?
---------- Forwarded message --------- От: Андрей Рандрианасулу <[email protected]> Date: сб, 29 окт. 2022 г., 18:43 Subject: cingg vs gimp 2.10 compositing mode divide To: randrianasulu <[email protected]>
I think you see, we are making black areas where gimp was making white areas... -- Андрей Рандрианасулу -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin