本文整理汇总了C++中PaintLayer::graphicsLayerBackingForScrolling方法的典型用法代码示例。如果您正苦于以下问题：C++ PaintLayer::graphicsLayerBackingForScrolling方法的具体用法？C++ PaintLayer::graphicsLayerBackingForScrolling怎么用？C++ PaintLayer::graphicsLayerBackingForScrolling使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PaintLayer的用法示例。
在下文中一共展示了PaintLayer::graphicsLayerBackingForScrolling方法的3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: setBodyInnerHTML
TEST_F(PaintLayerScrollableAreaTest, OpaqueLayersPromotedOnStyleChange) {
RuntimeEnabledFeatures::setCompositeOpaqueScrollersEnabled(true);
setBodyInnerHTML(
"<style>"
"#scroller { overflow: scroll; height: 200px; width: 200px; background: "
"rgba(255,255,255,0.5) local content-box; }"
"#scrolled { height: 300px; }"
"</style>"
"<div id=\"scroller\"><div id=\"scrolled\"></div></div>");
document().view()->updateAllLifecyclePhases();
EXPECT_TRUE(RuntimeEnabledFeatures::compositeOpaqueScrollersEnabled());
Element* scroller = document().getElementById("scroller");
PaintLayer* paintLayer =
toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_FALSE(paintLayer->needsCompositedScrolling());
// Change the background to transparent
scroller->setAttribute(HTMLNames::styleAttr,
"background: white local content-box;");
document().view()->updateAllLifecyclePhases();
paintLayer = toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_TRUE(paintLayer->needsCompositedScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBacking());
ASSERT_TRUE(paintLayer->graphicsLayerBackingForScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBackingForScrolling()->contentsOpaque());
}示例2: compositeOpaqueScrollers
// Test that opacity applied to the scroller or an ancestor will cause the
// scrolling contents layer to not be promoted.
TEST_F(PaintLayerScrollableAreaTest, OnlyOpaqueLayersPromoted) {
ScopedCompositeOpaqueScrollersForTest compositeOpaqueScrollers(true);
setBodyInnerHTML(
"<style>"
"#scroller { overflow: scroll; height: 200px; width: 200px; background: "
"white local content-box; }"
"#scrolled { height: 300px; }"
"</style>"
"<div id=\"parent\">"
" <div id=\"scroller\"><div id=\"scrolled\"></div></div>"
"</div>");
document().view()->updateAllLifecyclePhases();
EXPECT_TRUE(RuntimeEnabledFeatures::compositeOpaqueScrollersEnabled());
Element* parent = document().getElementById("parent");
Element* scroller = document().getElementById("scroller");
PaintLayer* paintLayer =
toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_TRUE(paintLayer->needsCompositedScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBacking());
ASSERT_TRUE(paintLayer->graphicsLayerBackingForScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBackingForScrolling()->contentsOpaque());
// Change the parent to be partially translucent.
parent->setAttribute(HTMLNames::styleAttr, "opacity: 0.5;");
document().view()->updateAllLifecyclePhases();
paintLayer = toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_FALSE(paintLayer->needsCompositedScrolling());
EXPECT_FALSE(paintLayer->graphicsLayerBacking());
// Change the parent to be opaque again.
parent->setAttribute(HTMLNames::styleAttr, "opacity: 1;");
document().view()->updateAllLifecyclePhases();
paintLayer = toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_TRUE(paintLayer->needsCompositedScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBacking());
ASSERT_TRUE(paintLayer->graphicsLayerBackingForScrolling());
EXPECT_TRUE(paintLayer->graphicsLayerBackingForScrolling()->contentsOpaque());
// Make the scroller translucent.
scroller->setAttribute(HTMLNames::styleAttr, "opacity: 0.5");
document().view()->updateAllLifecyclePhases();
paintLayer = toLayoutBoxModelObject(scroller->layoutObject())->layer();
ASSERT_TRUE(paintLayer);
EXPECT_FALSE(paintLayer->needsCompositedScrolling());
EXPECT_FALSE(paintLayer->graphicsLayerBacking());
}示例3: setBodyInnerHTML
TEST_P(CompositedLayerMappingTest, VerticalRightLeftWritingModeDocument) {
setBodyInnerHTML(
"<style>html,body { margin: 0px } html { -webkit-writing-mode: "
"vertical-rl}</style> <div id='target' style='width: 10000px; height: "
"200px;'></div>");
document().view()->updateAllLifecyclePhases();
document().view()->layoutViewportScrollableArea()->setScrollOffset(
ScrollOffset(-5000, 0), ProgrammaticScroll);
document().view()->updateAllLifecyclePhases();
PaintLayer* paintLayer = document().layoutViewItem().layer();
ASSERT_TRUE(paintLayer->graphicsLayerBacking());
ASSERT_TRUE(paintLayer->compositedLayerMapping());
// A scroll by -5000px is equivalent to a scroll by (10000 - 5000 - 800)px =
// 4200px in non-RTL mode. Expanding the resulting rect by 4000px in each
// direction yields this result.
EXPECT_RECT_EQ(
IntRect(200, 0, 8800, 600),
recomputeInterestRect(paintLayer->graphicsLayerBackingForScrolling()));
}