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Merge pull request #4869 from klokantech/improve-reproj-precision

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Improve precision of ol.reproj.render
This commit is contained in:
Petr Sloup
2016-02-19 09:14:32 +01:00
parent 6e7b130a45 83e251621a
commit 7b8feaa48f
1 changed files with 6 additions and 6 deletions
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12
src/ol/reproj/reproj.js
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@@ -128,17 +128,17 @@ ol.reproj.render = function(width, height, pixelRatio,
Math.round(pixelRatio * canvasWidthInUnits / sourceResolution),
Math.round(pixelRatio * canvasHeightInUnits / sourceResolution));
stitchContext.scale(pixelRatio / sourceResolution,
pixelRatio / sourceResolution);
stitchContext.translate(-sourceDataExtent[0], sourceDataExtent[3]);
var stitchScale = pixelRatio / sourceResolution;
sources.forEach(function(src, i, arr) {
var xPos = src.extent[0];
var yPos = -src.extent[3];
var xPos = src.extent[0] - sourceDataExtent[0];
var yPos = -(src.extent[3] - sourceDataExtent[3]);
var srcWidth = ol.extent.getWidth(src.extent);
var srcHeight = ol.extent.getHeight(src.extent);
stitchContext.drawImage(src.image, xPos, yPos, srcWidth, srcHeight);
stitchContext.drawImage(src.image,
xPos * stitchScale, yPos * stitchScale,
srcWidth * stitchScale, srcHeight * stitchScale);
});
var targetTopLeft = ol.extent.getTopLeft(targetExtent);