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Make tile transitions configurable

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This commit is contained in:
Tim Schaub
2017-09-16 15:54:29 -06:00
parent 76726a3a6f
commit 16e6d13700
25 changed files with 259 additions and 73 deletions
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src/ol/renderer/canvas/tilelayer.js
+18 -16
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@@ -183,7 +183,8 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame = function(frameState, layer
if (this.isDrawableTile_(tile)) {
if (tile.getState() == ol.TileState.LOADED) {
tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
if (!newTiles && (this.renderedTiles.indexOf(tile) === -1 || tile.getAlpha(ol.getUid(this), frameState.time) !== 1)) {
var inTransition = tile.getAlpha && tile.getAlpha(ol.getUid(this), frameState.time) !== 1;
if (!newTiles && (this.renderedTiles.indexOf(tile) === -1 || inTransition)) {
newTiles = true;
}
}
@@ -294,26 +295,27 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame = function(frameState, layer
* @param {number} gutter Tile gutter.
*/
ol.renderer.canvas.TileLayer.prototype.drawTileImage = function(tile, frameState, layerState, x, y, w, h, gutter) {
var image = tile.getImage(this.getLayer());
if (!image) {
return;
}
var alpha = tile.getAlpha(ol.getUid(this), frameState.time);
if (alpha === 1 && !this.getLayer().getSource().getOpaque(frameState.viewState.projection)) {
this.context.clearRect(x, y, w, h);
}
var image = tile.getImage(this.getLayer());
if (image) {
var alphaChanged = alpha !== this.context.globalAlpha;
if (alphaChanged) {
this.context.save();
this.context.globalAlpha = alpha;
}
this.context.drawImage(image, gutter, gutter,
image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h);
var alphaChanged = alpha !== this.context.globalAlpha;
if (alphaChanged) {
this.context.save();
this.context.globalAlpha = Math.min(0.5, alpha);
}
this.context.drawImage(image, gutter, gutter,
image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h);
if (alphaChanged) {
this.context.restore();
}
if (alpha !== 1) {
frameState.animate = true;
}
if (alphaChanged) {
this.context.restore();
}
if (alpha !== 1) {
frameState.animate = true;
}
};