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Bug 729528 - Move displayport calculation and comparison code into a DisplayPortCalculator class. No functional changes intended. r=Cwiiis

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This commit is contained in:
Kartikaya Gupta
2012-03-26 13:15:50 -04:00
parent bfe89d5e3c
commit f0353c25dd
4 changed files with 106 additions and 89 deletions
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23
mobile/android/base/gfx/LayerController.java
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@@ -118,11 +118,6 @@ public class LayerController implements Tabs.OnTabsChangedListener {
*/
public static final IntSize MIN_BUFFER = new IntSize(512, 1024);
/* If the visible rect is within the danger zone (measured in pixels from each edge of a tile),
* we start aggressively redrawing to minimize checkerboarding. */
private static final int DANGER_ZONE_X = 75;
private static final int DANGER_ZONE_Y = 150;
/* The time limit for pages to respond with preventDefault on touchevents
* before we begin panning the page */
private int mTimeout = 200;
@@ -330,23 +325,7 @@ public class LayerController implements Tabs.OnTabsChangedListener {
return false;
}
return aboutToCheckerboard();
}
// Returns true if a checkerboard is about to be visible.
private boolean aboutToCheckerboard() {
// Increase the size of the viewport (and clamp to page boundaries), and
// intersect it with the tile's displayport to determine whether we're
// close to checkerboarding.
FloatSize pageSize = getPageSize();
RectF adjustedViewport = RectUtils.expand(getViewport(), DANGER_ZONE_X, DANGER_ZONE_Y);
if (adjustedViewport.top < 0) adjustedViewport.top = 0;
if (adjustedViewport.left < 0) adjustedViewport.left = 0;
if (adjustedViewport.right > pageSize.width) adjustedViewport.right = pageSize.width;
if (adjustedViewport.bottom > pageSize.height) adjustedViewport.bottom = pageSize.height;
DisplayPortMetrics displayPort = (mLayerClient == null ? new DisplayPortMetrics() : mLayerClient.getDisplayPort());
return !displayPort.contains(adjustedViewport);
return DisplayPortCalculator.aboutToCheckerboard(mViewportMetrics, mLayerClient.getDisplayPort());
}
/**