I am using the latest GIT of the STABLE branch (2.6.8) and am noticing an anomaly when scaling layers. When upscaling a fully opaque layer using the Scale Tool, the edges of the resulting layer are sometimes have partial transparency. This doesn't always happen -- it seems dependent upon the original and target sizes -- but it never seems to occur when using "Scale Layer..." from the menus. While I am not sure it should be considered a bug, my expectation would be that a fully opaque layer should remain fully opaque when upscaled.
To demonstrate this behavior, create a new white image with the dimensions 335x500, then create a new black layer with the dimensions 120x135 positioned with the top-left corner at 0,0. Using the Scale Tool, type in the new dimensions of 335x500 and click "Scale". If you zoom in on the lower-right corner, the semi-transparency of the right and bottom edges should be evident. Repeating the above, but using the menu command "Layer->Layer Scale...", you should see that all of the edges are completely opaque. I would also note that the behavior described in Bug #603620 (https://bugzilla.gnome.org/show_bug.cgi?id=603620) may have similar underpinnings, and that the author of that report suggested this was a regression from GIMP 2.4 behavior (I don't have access to 2.4 at the moment). As a final comment, the PDB functions 'gimp-drawable-transform-scale' and 'gimp-drawable-transform-scale-default' both exhibit this anomalous behavior (for all interpolation modes except None). Indeed, it is when scripting that I find this behavior problematic. _______________________________________________ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
