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Add snapToPixel

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This commit is contained in:
Tom Payne
2013-11-10 13:57:25 +01:00
parent 8c3c304497
commit bc8c328483
4 changed files with 14 additions and 4 deletions
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1
src/ol/render/canvas/canvasrender.js
View File

@@ -1,5 +1,6 @@
// FIXME complete missing functionality
// FIXME factor out drawImage
// FIXME apply snapToPixel
// FIXME factor out moveTo/lineTo
goog.provide('ol.render.canvas.Render');

13
src/ol/render/canvas/canvasreplay.js
View File

@@ -1,3 +1,5 @@
// FIXME decide default snapToPixel behaviour
goog.provide('ol.render.canvas.BatchGroup');
goog.require('goog.array');
@@ -108,10 +110,13 @@ ol.render.canvas.Batch.prototype.draw = function(context, transform) {
end = /** @type {number} */ (instruction[1]);
var imageStyle = /** @type {ol.style.Image} */ (instruction[2]);
for (; i < end; i += 2) {
context.drawImage(
imageStyle.image,
pixelCoordinates[i] - imageStyle.anchor[0],
pixelCoordinates[i + 1] - imageStyle.anchor[1]);
var x = pixelCoordinates[i] - imageStyle.anchor[0];
var y = pixelCoordinates[i + 1] - imageStyle.anchor[1];
if (imageStyle.snapToPixel) {
x = (x + 0.5) | 0;
y = (y + 0.5) | 0;
}
context.drawImage(imageStyle.image, x, y);
}
} else if (type == ol.render.canvas.Instruction.FILL) {
context.fill();