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`ClutterOffscreenEffect` had been getting the wrong bounding box in the case of clones and descendents of clones, causing visibly incorrect clipping. This was due to `clutter_actor_get_paint_box` only ever being given the source actor during a paint (which is correct) and not the clone. Even if we weren't painting a clone but an offscreened descendent of a clone (like in gnome-shell's desktop zoom), we would get the wrong result. Fortunately we don't need to know the actual clone/actor being painted so don't need to call the problematic `clutter_actor_get_paint_box` at all. The solution is to only keep untransformed rendering in the FBO and leave the correct transformation for later. The correct clone/actor's transformation is already set for us as the current cogl modelview matrix by `clutter_actor_paint`. Bonus optimization: This all means we don't need to keep `last_matrix_drawn` or force a full repaint every time some part of the transformation changes. Because the FBO contents are no longer affected by transformations. As it should be. In other words, offscreen-effected actors can now move around on screen without themselves being repainted. Special thanks to Mai Lavelle for identifying the cause of the problem. Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=789050, https://bugzilla.gnome.org/show_bug.cgi?id=659523#c9, https://gitlab.gnome.org/GNOME/mutter/issues/196, https://gitlab.gnome.org/GNOME/mutter/issues/282, https://gitlab.gnome.org/GNOME/gnome-shell/issues/387, https://launchpad.net/bugs/1767648, https://launchpad.net/bugs/1779615 |
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| .. | ||
| scripts | ||
| actor-anchors.c | ||
| actor-destroy.c | ||
| actor-graph.c | ||
| actor-invariants.c | ||
| actor-iter.c | ||
| actor-layout.c | ||
| actor-meta.c | ||
| actor-offscreen-redirect.c | ||
| actor-paint-opacity.c | ||
| actor-pick.c | ||
| actor-shader-effect.c | ||
| actor-size.c | ||
| animator.c | ||
| behaviours.c | ||
| binding-pool.c | ||
| cairo-texture.c | ||
| cally-text.c | ||
| color.c | ||
| group.c | ||
| interval.c | ||
| meson.build | ||
| model.c | ||
| path.c | ||
| rectangle.c | ||
| score.c | ||
| script-parser.c | ||
| state.c | ||
| text-cache.c | ||
| text.c | ||
| texture-fbo.c | ||
| texture.c | ||
| timeline-interpolate.c | ||
| timeline-progress.c | ||
| timeline-rewind.c | ||
| timeline.c | ||
| units.c | ||