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Implement text rendering along paths

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This commit also changes the TextReplay.drawText() signature, and moves
geometry calculation into drawText(). This improves performance where no
text needs to be rendered (TextStyle.getText() == ''), which is used often
in applications.
This commit is contained in:
Andreas Hocevar
2017-09-07 23:32:31 +02:00
parent 37dcd79a86
commit efc86d59b0
12 changed files with 640 additions and 189 deletions
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11
test/spec/ol/render/webgl/textreplay.test.js
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@@ -1,6 +1,5 @@
goog.require('ol.dom');
goog.require('ol.geom.Point');
goog.require('ol.render.webgl.TextReplay');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
@@ -127,19 +126,19 @@ describe('ol.render.webgl.TextReplay', function() {
var point;
point = [1000, 2000];
replay.drawText(point, 0, 2, 2, null, null);
replay.drawText(new ol.geom.Point(point), null);
expect(replay.vertices).to.have.length(256);
expect(replay.indices).to.have.length(48);
point = [2000, 3000];
replay.drawText(point, 0, 2, 2, null, null);
replay.drawText(new ol.geom.Point(point), null);
expect(replay.vertices).to.have.length(512);
expect(replay.indices).to.have.length(96);
});
it('sets part of its state during drawing', function() {
var point = [1000, 2000];
replay.drawText(point, 0, 2, 2, null, null);
replay.drawText(new ol.geom.Point(point), null);
var height = replay.currAtlas_.height;
var widths = replay.currAtlas_.width;
@@ -163,7 +162,7 @@ describe('ol.render.webgl.TextReplay', function() {
var point;
point = [1000, 2000];
replay.drawText(point, 0, 2, 2, null, null);
replay.drawText(new ol.geom.Point(point), null);
expect(replay.vertices).to.have.length(0);
expect(replay.indices).to.have.length(0);
});