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Improve text rendering performance

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This commit is contained in:
Andreas Hocevar
2017-10-31 08:51:15 +01:00
parent 6ce201c429
commit e6ae029d08
1 changed files with 3 additions and 3 deletions
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src/ol/render/canvas/textreplay.js
+3 -3
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@@ -322,8 +322,6 @@ ol.render.canvas.TextReplay.prototype.getImage_ = function(text, fill, stroke) {
var label; var label;
var key = (stroke ? this.strokeKey_ : '') + this.textKey_ + text + (fill ? this.fillKey_ : ''); var key = (stroke ? this.strokeKey_ : '') + this.textKey_ + text + (fill ? this.fillKey_ : '');
var lines = text.split('\n');
var numLines = lines.length;
if (!ol.render.canvas.TextReplay.labelCache_.containsKey(key)) { if (!ol.render.canvas.TextReplay.labelCache_.containsKey(key)) {
var strokeState = this.textStrokeState_; var strokeState = this.textStrokeState_;
var fillState = this.textFillState_; var fillState = this.textFillState_;
@@ -333,6 +331,8 @@ ol.render.canvas.TextReplay.prototype.getImage_ = function(text, fill, stroke) {
var align = ol.render.replay.TEXT_ALIGN[textState.textAlign || ol.render.canvas.defaultTextAlign]; var align = ol.render.replay.TEXT_ALIGN[textState.textAlign || ol.render.canvas.defaultTextAlign];
var strokeWidth = stroke && strokeState.lineWidth ? strokeState.lineWidth : 0; var strokeWidth = stroke && strokeState.lineWidth ? strokeState.lineWidth : 0;
var lines = text.split('\n');
var numLines = lines.length;
var widths = []; var widths = [];
var width = ol.render.canvas.TextReplay.measureTextWidths(textState.font, lines, widths); var width = ol.render.canvas.TextReplay.measureTextWidths(textState.font, lines, widths);
var lineHeight = ol.render.canvas.TextReplay.measureTextHeight(textState.font); var lineHeight = ol.render.canvas.TextReplay.measureTextHeight(textState.font);
@@ -351,7 +351,7 @@ ol.render.canvas.TextReplay.prototype.getImage_ = function(text, fill, stroke) {
context.lineCap = strokeState.lineCap; context.lineCap = strokeState.lineCap;
context.lineJoin = strokeState.lineJoin; context.lineJoin = strokeState.lineJoin;
context.miterLimit = strokeState.miterLimit; context.miterLimit = strokeState.miterLimit;
if (ol.has.CANVAS_LINE_DASH) { if (ol.has.CANVAS_LINE_DASH && strokeState.lineDash.length) {
context.setLineDash(strokeState.lineDash); context.setLineDash(strokeState.lineDash);
context.lineDashOffset = strokeState.lineDashOffset; context.lineDashOffset = strokeState.lineDashOffset;
} }