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Use ol.transform.compose() for common transform compositions

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This commit is contained in:
Tim Schaub
2016-06-24 10:43:14 -06:00
committed by Andreas Hocevar
parent a655234cc3
commit 618cb389e5
12 changed files with 80 additions and 88 deletions
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18
src/ol/renderer/canvas/canvasmaprenderer.js
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@@ -120,17 +120,15 @@ ol.renderer.canvas.Map.prototype.dispatchComposeEvent_ = function(type, frameSta
* @return {!ol.Transform} Transform.
*/
ol.renderer.canvas.Map.prototype.getTransform = function(frameState) {
var pixelRatio = frameState.pixelRatio;
var viewState = frameState.viewState;
var resolution = viewState.resolution;
var transform = ol.transform.reset(this.transform_);
ol.transform.translate(transform,
this.canvas_.width / 2, this.canvas_.height / 2);
ol.transform.scale(transform,
pixelRatio / resolution, -pixelRatio / resolution);
ol.transform.rotate(transform, -viewState.rotation);
return ol.transform.translate(transform,
-viewState.center[0], -viewState.center[1]);
var dx1 = this.canvas_.width / 2;
var dy1 = this.canvas_.height / 2;
var sx = frameState.pixelRatio / viewState.resolution;
var sy = -sx;
var angle = -viewState.rotation;
var dx2 = -viewState.center[0];
var dy2 = -viewState.center[1];
return ol.transform.compose(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);
};