Summary:
If the corner shadow tiles(top-left, top-right, and so on) tiles are missing,
then the left/top/right/bottom shadow tiles will overlap.
This diff addresses that problem by changing how the shadow texture
atlas is rendered:
* corner tiles will be drawn in the corners of the atlas(buildQuads
method expects them to be at the corners);
* top, right, bottom, and left tile will be aligned to the top-left
corner of the inner shadow rect.
For majority of desktop themes, the shadow texture atlas looks the same.
For example, here's for Aether:
Before:
{F6190484, layout=center, size=full}
After:
{F6190488, layout=center, size=full}
Depends on D14783
Reviewers: #kwin, davidedmundson
Reviewed By: #kwin, davidedmundson
Subscribers: davidedmundson, abetts, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D14784
Summary:
Current implementation of buildQuads assumes that corner shadow tiles
are always present:
const QRectF leftRect(
topLeftRect.bottomLeft(),
bottomLeftRect.topRight());
but that assumption is wrong. For example, if the default panel is on
the bottom screen edge, then the calendar popup won't have the
bottom-left shadow tile(at least on Wayland). Which means that the left
shadow tile won't be visible because
topLeftRect.left() == bottomLeftRect.right().
Corner rectangles only have to influence height of the left/right tile
and width of the top/bottom tile. Width of the left/right tile and
height of the top/bottom tile should not be controlled by corner tiles.
Overall, this is how shadow quads are computed:
* Compute the outer rectangle;
* Compute target rectangle for each corner tile. If some corner tile is
missing, move the target rectangle to the corresponding corner of the
inner shadow rect and set its width and height to 0. We need to do
that to prevent top/right/bottom/left tiles from spanning over
corners:
{F6190219, layout=center, size=full}
We would rather prefer something like this if the top-left tile is
missing:
{F6190233, layout=center, size=full}
* Fix overlaps between corner tiles;
* Compute target rectangles for top, right, bottom, and left tiles;
* Fix overlaps between left/right and top/bottom shadow tiles.
Test Plan:
* Ran tests;
* Resized Konsole to its minimimum size(on X11 and Wayland);
* Opened the calendar popup(on X11 and Wayland):
Before:
{F6190344, layout=center, size=full}
After:
{F6190346, layout=center, size=full}
Reviewers: #kwin, davidedmundson
Reviewed By: #kwin, davidedmundson
Subscribers: abetts, davidedmundson, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D14783
Summary:
This problem appears if shadow corner tiles are too big and
some window has size smaller than 2 * shadowTileSize.
This change tries to address the problem above by exclusing
overlapping tile parts. If there are any two overlapping corners
then tile between them(top/right/bottom/left) is not rendered.
Also, because some corner tile parts can be excluded, corner tiles
are expected to be symmetrical(i.e. if we remove right half from
the top-left tile and left half from the top-right tile and
stick them together, they still look fine, there are no misalignments, etc).
Most shadows(e.g. shadows from Breeze) have such behaviour.
No tiles are overlapping
{F5728514, layout=center, size=full}
Overlapping tiles
{F5728516, layout=center, size=full}
And this is how it supposed to be
{F5728517, layout=center, size=full}
Test Plan:
* apply D11069 to Breeze
* in System Settings/Application Style/Window Decorations, choose "Very Large" shadow size
* open Konsole
* resize it to a minimum possible size
Reviewers: #kwin, graesslin, davidedmundson
Reviewed By: #kwin, davidedmundson
Subscribers: davidedmundson, ngraham, anemeth, abetts, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D10811
