b8a70e62d5
At the moment, our frame scheduling infrastructure is still heavily based on Xinerama-style rendering. Specifically, we assume that painting is driven by a single timer, etc. This change introduces a new type - RenderLoop. Its main purpose is to drive compositing on a specific output, or in case of X11, on the overlay window. With RenderLoop, compositing is synchronized to vblank events. It exposes the last and the next estimated presentation timestamp. The expected presentation timestamp can be used by effects to ensure that animations are synchronized with the upcoming vblank event. On Wayland, every outputs has its own render loop. On X11, per screen rendering is not possible, therefore the platform exposes the render loop for the overlay window. Ideally, the Scene has to expose the RenderLoop, but as the first step towards better compositing scheduling it's good as is for the time being. The RenderLoop tries to minimize the latency by delaying compositing as close as possible to the next vblank event. One tricky thing about it is that if compositing is too close to the next vblank event, animations may become a little bit choppy. However, increasing the latency reduces the choppiness. Given that, there is no any "silver bullet" solution for the choppiness issue, a new option has been added in the Compositing KCM to specify the amount of latency. By default, it's "Medium," but if a user is not satisfied with the upstream default, they can tweak it.
343 lines
9.4 KiB
XML
343 lines
9.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>CompositingForm</class>
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<widget class="QWidget" name="CompositingForm">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>526</width>
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<height>395</height>
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</rect>
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</property>
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<layout class="QFormLayout" name="formLayout">
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<property name="fieldGrowthPolicy">
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<enum>QFormLayout::AllNonFixedFieldsGrow</enum>
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</property>
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<property name="labelAlignment">
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<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
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</property>
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<item row="0" column="0" colspan="2">
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<layout class="QVBoxLayout" name="verticalLayout_4">
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<item>
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<widget class="KMessageWidget" name="glCrashedWarning">
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<property name="visible">
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<bool>false</bool>
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</property>
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<property name="text">
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<string>OpenGL compositing (the default) has crashed KWin in the past.
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This was most likely due to a driver bug.
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If you think that you have meanwhile upgraded to a stable driver,
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you can reset this protection but be aware that this might result in an immediate crash!
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Alternatively, you might want to use the XRender backend instead.</string>
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</property>
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<property name="wordWrap">
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<bool>true</bool>
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</property>
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</widget>
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</item>
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<item>
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<widget class="KMessageWidget" name="scaleWarning">
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<property name="visible">
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<bool>false</bool>
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</property>
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<property name="text">
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<string>Scale method "Accurate" is not supported by all hardware and can cause performance regressions and rendering artifacts.</string>
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</property>
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<property name="wordWrap">
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<bool>true</bool>
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</property>
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</widget>
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</item>
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<item>
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<widget class="KMessageWidget" name="tearingWarning">
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<property name="visible">
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<bool>false</bool>
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</property>
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<property name="wordWrap">
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<bool>true</bool>
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</property>
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</widget>
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</item>
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<item>
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<widget class="KMessageWidget" name="windowThumbnailWarning">
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<property name="visible">
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<bool>false</bool>
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</property>
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<property name="text">
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<string>Keeping the window thumbnail always interferes with the minimized state of windows. This can result in windows not suspending their work when minimized.</string>
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</property>
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<property name="wordWrap">
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<bool>true</bool>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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<item row="2" column="1">
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<widget class="QCheckBox" name="kcfg_Enabled">
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<property name="text">
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<string>Enable compositor on startup</string>
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</property>
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</widget>
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</item>
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<item row="3" column="0">
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<widget class="QLabel" name="animationSpeedLabel">
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<property name="text">
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<string>Animation speed:</string>
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</property>
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</widget>
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</item>
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<item row="3" column="1">
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<widget class="QWidget" name="animationSpeedControls" native="true">
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<property name="sizePolicy">
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<sizepolicy hsizetype="Preferred" vsizetype="Fixed">
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<horstretch>0</horstretch>
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<verstretch>0</verstretch>
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</sizepolicy>
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</property>
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<layout class="QVBoxLayout" name="verticalLayout">
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<item>
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<widget class="QSlider" name="animationDurationFactor">
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<property name="minimum">
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<number>0</number>
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</property>
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<property name="maximum">
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<number>0</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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<property name="tickPosition">
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<enum>QSlider::TicksBelow</enum>
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</property>
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<property name="tickInterval">
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<number>1</number>
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</property>
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</widget>
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</item>
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<item>
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<layout class="QHBoxLayout" name="_3">
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<item>
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<widget class="QLabel" name="label_3">
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<property name="text">
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<string>Very slow</string>
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</property>
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</widget>
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</item>
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<item>
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<spacer name="horizontalSpacer">
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>40</width>
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<height>20</height>
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</size>
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</property>
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</spacer>
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</item>
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<item>
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<widget class="QLabel" name="label">
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<property name="text">
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<string>Instant</string>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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</layout>
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</widget>
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</item>
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<item row="5" column="0">
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<widget class="QLabel" name="scaleMethodLabel">
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<property name="text">
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<string>Scale method:</string>
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</property>
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</widget>
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</item>
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<item row="5" column="1">
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<layout class="QHBoxLayout" name="horizontalLayout">
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<item>
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<widget class="QComboBox" name="kcfg_XRenderSmoothScale">
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<item>
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<property name="text">
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<string>Crisp</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Smooth (slower)</string>
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</property>
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</item>
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</widget>
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</item>
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<item>
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<widget class="QComboBox" name="kcfg_glTextureFilter">
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<item>
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<property name="text">
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<string>Crisp</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Smooth</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Accurate</string>
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</property>
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</item>
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</widget>
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</item>
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</layout>
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</item>
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<item row="7" column="0" colspan="2">
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<widget class="Line" name="line">
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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<item row="8" column="0">
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<widget class="QLabel" name="label_2">
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<property name="text">
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<string>Rendering backend:</string>
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</property>
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</widget>
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</item>
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<item row="8" column="1">
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<widget class="QComboBox" name="backend"/>
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</item>
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<item row="9" column="0" colspan="2">
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<widget class="Line" name="line_2">
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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<item row="12" column="0">
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<widget class="QLabel" name="label_5">
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<property name="text">
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<string>Tearing prevention ("vsync"):</string>
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</property>
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</widget>
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</item>
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<item row="12" column="1">
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<widget class="QComboBox" name="kcfg_glPreferBufferSwap">
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<item>
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<property name="text">
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<string>Never</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Automatic</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Only when cheap</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Full screen repaints</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Re-use screen content</string>
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</property>
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</item>
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</widget>
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</item>
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<item row="13" column="0">
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<widget class="QLabel" name="label_6">
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<property name="text">
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<string>Keep window thumbnails:</string>
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</property>
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</widget>
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</item>
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<item row="13" column="1">
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<widget class="QComboBox" name="kcfg_HiddenPreviews">
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<item>
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<property name="text">
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<string>Never</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Only for Shown Windows</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Always</string>
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</property>
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</item>
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</widget>
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</item>
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<item row="15" column="1">
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<widget class="QCheckBox" name="kcfg_WindowsBlockCompositing">
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<property name="toolTip">
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<string>Applications can set a hint to block compositing when the window is open.
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This brings performance improvements for e.g. games.
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The setting can be overruled by window-specific rules.</string>
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</property>
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<property name="text">
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<string>Allow applications to block compositing</string>
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</property>
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</widget>
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</item>
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<item row="11" column="0">
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<widget class="QLabel" name="latencyLabel">
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<property name="text">
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<string>Latency:</string>
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</property>
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</widget>
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</item>
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<item row="11" column="1">
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<widget class="QComboBox" name="kcfg_LatencyPolicy">
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<item>
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<property name="text">
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<string>Force lowest latency (may cause dropped frames)</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Prefer lower latency</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Balance of latency and smoothness</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Prefer smoother animations</string>
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</property>
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</item>
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<item>
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<property name="text">
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<string>Force smoothest animations</string>
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</property>
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</item>
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</widget>
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</item>
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</layout>
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</widget>
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<customwidgets>
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<customwidget>
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<class>KMessageWidget</class>
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<extends>QFrame</extends>
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<header>kmessagewidget.h</header>
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<container>1</container>
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</customwidget>
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</customwidgets>
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<resources/>
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<connections/>
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</ui>
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