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Schedule a decoration repaint when client is resized 

Summary:
If a client has been resized, it doesn't necessarily mean that the
decoration theme will schedule full repaint of the window frame. In
OpenGL and Xrender scene, we have a little hack that forces a full
repaint of window borders. However, we don't have one in QPainter
scene which causes all sorts of weird looking artifacts when resizing
a server-side decorated client.

We could add yet another hack in the QPainter scene, but a better
approach to tackle this problem would be to make DecoratedClient
schedule a full repaint of the decoration. It makes code in scene
plugins more straightforward and prevents us from repeating the same
mistake again.

Test Plan:
No longer able to see invisible decoration borders when
using QPainter render backend.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D26927
master
Vlad Zahorodnii 2020-01-26 15:08:52 +02:00
parent 827578577f
commit bd52b6791e
3 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
decorations/decorationrenderer.cpp
View File

@ -40,12 +40,12 @@ Renderer::Renderer(DecoratedClientImpl *client)
, m_imageSizesDirty(true)
{
auto markImageSizesDirty = [this]{
schedule(m_client->client()->rect());
m_imageSizesDirty = true;
};
connect(client->client(), &AbstractClient::screenScaleChanged, this, markImageSizesDirty);
connect(client->decoration(), &KDecoration2::Decoration::bordersChanged, this, markImageSizesDirty);
connect(client->decoratedClient(), &KDecoration2::DecoratedClient::widthChanged, this, markImageSizesDirty);
connect(client->decoratedClient(), &KDecoration2::DecoratedClient::heightChanged, this, markImageSizesDirty);
connect(client->decoratedClient(), &KDecoration2::DecoratedClient::sizeChanged, this, markImageSizesDirty);
}
Renderer::~Renderer() = default;

9
plugins/scenes/opengl/scene_opengl.cpp
View File

@ -2562,11 +2562,10 @@ static void clamp(QImage &image, const QRect &viewport)
void SceneOpenGLDecorationRenderer::render()
{
const QRegion scheduled = getScheduled();
const bool dirty = areImageSizesDirty();
if (scheduled.isEmpty() && !dirty) {
if (scheduled.isEmpty()) {
return;
}
if (dirty) {
if (areImageSizesDirty()) {
resizeTexture();
resetImageSizesDirty();
}
@ -2579,8 +2578,6 @@ void SceneOpenGLDecorationRenderer::render()
QRect left, top, right, bottom;
client()->client()->layoutDecorationRects(left, top, right, bottom);
const QRect geometry = dirty ? QRect(QPoint(0, 0), client()->client()->size()) : scheduled.boundingRect();
// We pad each part in the decoration atlas in order to avoid texture bleeding.
const int padding = 1;
@ -2634,6 +2631,8 @@ void SceneOpenGLDecorationRenderer::render()
m_texture->update(image, (position + dirtyOffset - viewport.topLeft()) * image.devicePixelRatio());
};
const QRect geometry = scheduled.boundingRect();
const QPoint topPosition(padding, padding);
const QPoint bottomPosition(padding, topPosition.y() + top.height() + 2 * padding);
const QPoint leftPosition(padding, bottomPosition.y() + bottom.height() + 2 * padding);

1
plugins/scenes/xrender/scene_xrender.cpp
View File

@ -1229,7 +1229,6 @@ void SceneXRenderDecorationRenderer::render()
if (areImageSizesDirty()) {
resizePixmaps();
resetImageSizesDirty();
scheduled = client()->client()->decorationRect();
}
const QRect top(QPoint(0, 0), m_sizes[int(DecorationPart::Top)]);