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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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32
src/ol/render/webgl/immediate.js
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@@ -88,19 +88,15 @@ ol.inherits(ol.render.webgl.Immediate, ol.render.VectorContext);
/**
* @param {ol.render.webgl.ReplayGroup} replayGroup Replay group.
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {number} end End.
* @param {number} stride Stride.
* @param {ol.geom.Geometry|ol.render.Feature} geometry Geometry.
* @private
*/
ol.render.webgl.Immediate.prototype.drawText_ = function(replayGroup,
flatCoordinates, offset, end, stride) {
ol.render.webgl.Immediate.prototype.drawText_ = function(replayGroup, geometry) {
var context = this.context_;
var replay = /** @type {ol.render.webgl.TextReplay} */ (
replayGroup.getReplay(0, ol.render.ReplayType.TEXT));
replay.setTextStyle(this.textStyle_);
replay.drawText(flatCoordinates, offset, end, stride, null, null);
replay.drawText(geometry, null);
replay.finish(context);
// default colors
var opacity = 1;
@@ -219,9 +215,7 @@ ol.render.webgl.Immediate.prototype.drawPoint = function(geometry, data) {
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatCoordinates = geometry.getFlatCoordinates();
var stride = geometry.getStride();
this.drawText_(replayGroup, flatCoordinates, 0, flatCoordinates.length, stride);
this.drawText_(replayGroup, geometry);
}
};
@@ -247,9 +241,7 @@ ol.render.webgl.Immediate.prototype.drawMultiPoint = function(geometry, data) {
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatCoordinates = geometry.getFlatCoordinates();
var stride = geometry.getStride();
this.drawText_(replayGroup, flatCoordinates, 0, flatCoordinates.length, stride);
this.drawText_(replayGroup, geometry);
}
};
@@ -275,8 +267,7 @@ ol.render.webgl.Immediate.prototype.drawLineString = function(geometry, data) {
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatMidpoint = geometry.getFlatMidpoint();
this.drawText_(replayGroup, flatMidpoint, 0, 2, 2);
this.drawText_(replayGroup, geometry);
}
};
@@ -302,8 +293,7 @@ ol.render.webgl.Immediate.prototype.drawMultiLineString = function(geometry, dat
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatMidpoints = geometry.getFlatMidpoints();
this.drawText_(replayGroup, flatMidpoints, 0, flatMidpoints.length, 2);
this.drawText_(replayGroup, geometry);
}
};
@@ -329,8 +319,7 @@ ol.render.webgl.Immediate.prototype.drawPolygon = function(geometry, data) {
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatInteriorPoint = geometry.getFlatInteriorPoint();
this.drawText_(replayGroup, flatInteriorPoint, 0, 2, 2);
this.drawText_(replayGroup, geometry);
}
};
@@ -356,8 +345,7 @@ ol.render.webgl.Immediate.prototype.drawMultiPolygon = function(geometry, data)
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
var flatInteriorPoints = geometry.getFlatInteriorPoints();
this.drawText_(replayGroup, flatInteriorPoints, 0, flatInteriorPoints.length, 2);
this.drawText_(replayGroup, geometry);
}
};
@@ -383,7 +371,7 @@ ol.render.webgl.Immediate.prototype.drawCircle = function(geometry, data) {
replay.getDeleteResourcesFunction(context)();
if (this.textStyle_) {
this.drawText_(replayGroup, geometry.getCenter(), 0, 2, 2);
this.drawText_(replayGroup, geometry);
}
};