[Gimp-developer] [Plugin-Development-C] Naive question : accessing "flattened" image pixels
Anti Matter via gimp-developer-list <[email protected]>
| Newsgroups | gmane.comp.video.gimp.devel |
|---|---|
| Message-ID | <CAABnonsW6WK0-Rf8x=7bY1dbXt4YG7Y2HJzLzd9D=PSdwzp4BQ@mail.gmail.com> |
Hi, this will probably seem like a silly question... I have been working on an animation plug-in for GIMP as a pet project, and I have been hitting a wall. The plugin has a complex dialog with a preview window and playback controls and whatnot. The preview works ok when each layer of the image is used as a frame in the animation. I am using gimp_pixel_rgn_xxx functions to retrieve layers content, and blit them to my preview area : fine. Now what I want to do is to have a "sprite sheet" mode, where an animation frame is a portion of the full image, however that image might be arranged in terms of layers. So basically, I want to be able to retrieve a pixel region of the current view of the image (fully flattened, with proper blend modes, not showing hidden layers, (at a given zoom factor?)). Problem is, pixel regions work at the drawable level, and a full image is not a drawable. I looked at the API reference for hours to no avail. Other plugins tend to work at the drawable level too. The native animation playback plugin works by creating a dummy image and duplicating/merging layers from the source image based on the animation compositing policy, but that seems a little overkill (and might not handle layer blend modes properly). I want the preview to be updated when the image is modified, trashing and creating a flattened version of the full image on each alteration of the source image seems prohibitive, but might be a good approach... I pondered using the thumbnail API, but it seems to be limited to 1024x1024 max size, and feels like a convoluted way of doing this. What API nugget am I missing? What would be the best approach to do this? Cheers, A pondering maniac. _______________________________________________ gimp-developer-list mailing list List address: [email protected] List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list