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Fix calculation of the shadow size in the OpenGL compositor

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Summary:
This change addresses the problem of the incorrectly rendered shadows
when opening a window (e.g. Kickoff) a second time. In case of e.g.
Kickoff not all elements are set, thus e.g. left might be 0, but right
has a value. So for calculating the height the maximum of the values
must be used.

Test Plan: Opened Kickoff and systray a few times

Reviewers: #kwin, #plasma_on_wayland

Subscribers: plasma-devel, kwin

Tags: #plasma_on_wayland, #kwin

Differential Revision: https://phabricator.kde.org/D1792
This commit is contained in:
Martin Gräßlin 2016-06-07 15:53:39 +02:00
parent d16d77f7fe
commit 2cc47004c3
1 changed files with 13 additions and 4 deletions
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17
scene_opengl.cpp
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@ -2276,8 +2276,12 @@ void SceneOpenGLShadow::buildQuads()
const QRectF outerRect(QPointF(-leftOffset(), -topOffset()),
QPointF(topLevel()->width() + rightOffset(), topLevel()->height() + bottomOffset()));
const qreal width = topLeft.width() + top.width() + topRight.width();
const qreal height = topLeft.height() + left.height() + bottomLeft.height();
const int width = qMax(topLeft.width(), bottomLeft.width()) +
qMax(top.width(), bottom.width()) +
qMax(topRight.width(), bottomRight.width());
const int height = qMax(topLeft.height(), bottomLeft.height()) +
qMax(left.height(), right.height()) +
qMax(bottomLeft.height(), bottomRight.height());
qreal tx1(0.0), tx2(0.0), ty1(0.0), ty2(0.0);
@ -2377,9 +2381,14 @@ bool SceneOpenGLShadow::prepareBackend()
const QSize bottomLeft(shadowPixmap(ShadowElementBottomLeft).size());
const QSize left(shadowPixmap(ShadowElementLeft).size());
const QSize topLeft(shadowPixmap(ShadowElementTopLeft).size());
const QSize bottomRight(shadowPixmap(ShadowElementBottomRight).size());
const int width = topLeft.width() + top.width() + topRight.width();
const int height = topLeft.height() + left.height() + bottomLeft.height();
const int width = qMax(topLeft.width(), bottomLeft.width()) +
qMax(top.width(), bottom.width()) +
qMax(topRight.width(), bottomRight.width());
const int height = qMax(topLeft.height(), bottomLeft.height()) +
qMax(left.height(), right.height()) +
qMax(bottomLeft.height(), bottomRight.height());
if (width == 0 || height == 0) {
return false;