本文整理汇总了C++中mozilla::layers::FrameMetrics类的典型用法代码示例。如果您正苦于以下问题：C++ FrameMetrics类的具体用法？C++ FrameMetrics怎么用？C++ FrameMetrics使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了FrameMetrics类的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: RecenterDisplayPort
static void
RecenterDisplayPort(mozilla::layers::FrameMetrics& aFrameMetrics)
{
LayerMargin margins = aFrameMetrics.GetDisplayPortMargins();
margins.right = margins.left = margins.LeftRight() / 2;
margins.top = margins.bottom = margins.TopBottom() / 2;
aFrameMetrics.SetDisplayPortMargins(margins);
}示例2: AdjustDisplayPortForScrollDelta
static void
AdjustDisplayPortForScrollDelta(mozilla::layers::FrameMetrics& aFrameMetrics,
const CSSPoint& aActualScrollOffset)
{
// Correct the display-port by the difference between the requested scroll
// offset and the resulting scroll offset after setting the requested value.
LayerPoint shift =
(aFrameMetrics.GetScrollOffset() - aActualScrollOffset) *
aFrameMetrics.LayersPixelsPerCSSPixel();
LayerMargin margins = aFrameMetrics.GetDisplayPortMargins();
margins.left -= shift.x;
margins.right += shift.x;
margins.top -= shift.y;
margins.bottom += shift.y;
aFrameMetrics.SetDisplayPortMargins(margins);
}示例3: RecenterDisplayPort
static void
RecenterDisplayPort(mozilla::layers::FrameMetrics& aFrameMetrics)
{
CSSRect compositionBounds(aFrameMetrics.CalculateCompositedRectInCssPixels());
aFrameMetrics.mDisplayPort.x = (compositionBounds.width - aFrameMetrics.mDisplayPort.width) / 2;
aFrameMetrics.mDisplayPort.y = (compositionBounds.height - aFrameMetrics.mDisplayPort.height) / 2;
}示例4: MaybeAlignAndClampDisplayPort
static void
MaybeAlignAndClampDisplayPort(mozilla::layers::FrameMetrics& aFrameMetrics,
const CSSPoint& aActualScrollOffset)
{
// Correct the display-port by the difference between the requested scroll
// offset and the resulting scroll offset after setting the requested value.
CSSRect& displayPort = aFrameMetrics.mDisplayPort;
displayPort += aFrameMetrics.mScrollOffset - aActualScrollOffset;
// Expand the display port to the next tile boundaries, if tiled thebes layers
// are enabled.
if (gfxPlatform::GetPrefLayersEnableTiles()) {
displayPort =
ExpandDisplayPortToTileBoundaries(displayPort + aActualScrollOffset,
aFrameMetrics.LayersPixelsPerCSSPixel())
- aActualScrollOffset;
}
// Finally, clamp the display port to the expanded scrollable rect.
CSSRect scrollableRect = aFrameMetrics.GetExpandedScrollableRect();
displayPort = scrollableRect.Intersect(displayPort + aActualScrollOffset)
- aActualScrollOffset;
}