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Render map replay group on the correct world instead of wrapping it

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By using the frameState's focus, we can adjust extent and transform and
render it for the world of interest instead of wrapping it and rendering
for every visible world.
This commit is contained in:
Andreas Hocevar
2015-04-22 09:11:19 +02:00
parent 23ed120361
commit 513677fecd
7 changed files with 108 additions and 101 deletions
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src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+27 -9
View File
@@ -77,6 +77,7 @@ ol.renderer.canvas.VectorLayer.prototype.composeFrame =
function(frameState, layerState, context) {
var extent = frameState.extent;
var focus = frameState.focus;
var pixelRatio = frameState.pixelRatio;
var skippedFeatureUids = frameState.skippedFeatureUids;
var viewState = frameState.viewState;
@@ -107,30 +108,47 @@ ol.renderer.canvas.VectorLayer.prototype.composeFrame =
// see http://jsperf.com/context-save-restore-versus-variable
var alpha = replayContext.globalAlpha;
replayContext.globalAlpha = layerState.opacity;
replayGroup.replay(
replayContext, pixelRatio, transform, rotation, skippedFeatureUids);
var noSkip = {};
var focusX = focus[0];
if (vectorSource.getWrapX() && projection.canWrapX() &&
!ol.extent.containsExtent(projectionExtent, frameState.extent)) {
!ol.extent.containsExtent(projectionExtent, extent)) {
var projLeft = projectionExtent[0];
var projRight = projectionExtent[2];
// A feature from skippedFeatureUids will only be skipped in the world
// that has the frameState's focus, because this is where a feature
// overlay for highlighting or selection would render the skipped
// feature.
replayGroup.replay(replayContext, pixelRatio, transform, rotation,
projLeft <= focusX && focusX <= projRight ?
skippedFeatureUids : noSkip);
var startX = extent[0];
var worldWidth = ol.extent.getWidth(projectionExtent);
var world = 0;
var offsetX;
while (startX < projectionExtent[0]) {
--world;
transform = this.getTransform(frameState, worldWidth * world);
replayGroup.replay(
replayContext, pixelRatio, transform, rotation, skippedFeatureUids);
offsetX = worldWidth * world;
transform = this.getTransform(frameState, offsetX);
replayGroup.replay(replayContext, pixelRatio, transform, rotation,
projLeft + offsetX <= focusX && focusX <= projRight + offsetX ?
skippedFeatureUids : noSkip);
startX += worldWidth;
}
world = 0;
startX = extent[2];
while (startX > projectionExtent[2]) {
++world;
transform = this.getTransform(frameState, worldWidth * world);
replayGroup.replay(
replayContext, pixelRatio, transform, rotation, skippedFeatureUids);
offsetX = worldWidth * world;
transform = this.getTransform(frameState, offsetX);
replayGroup.replay(replayContext, pixelRatio, transform, rotation,
projLeft + offsetX <= focusX && focusX <= projRight + offsetX ?
skippedFeatureUids : noSkip);
startX -= worldWidth;
}
} else {
replayGroup.replay(
replayContext, pixelRatio, transform, rotation, skippedFeatureUids);
}
if (replayContext != context) {