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Snapshot ol.webgl.TileLayerRenderer

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This commit is contained in:
Tom Payne
2012-07-15 20:49:51 +02:00
parent dd40b4a758
commit e23e19c074
1 changed files with 78 additions and 13 deletions
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91
src/ol/webgl/tilelayerrenderer.js
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@@ -19,35 +19,47 @@ ol.webgl.TileLayerRenderer = function(map, tileLayer) {
goog.base(this, map, tileLayer);
/**
* @type {goog.math.Size}
* @private
* @type {goog.math.Size}
*/
this.size_ = null;
/**
* @type {WebGLTexture}
* @private
* @type {WebGLTexture}
*/
this.texture_ = null;
/**
* @type {WebGLRenderbuffer}
* @private
* @type {goog.math.Size}
*/
this.textureSize_ = null;
/**
* @private
* @type {WebGLRenderbuffer}
*/
this.renderbuffer_ = null;
/**
* @type {WebGLFramebuffer}
* @private
* @type {WebGLFramebuffer}
*/
this.framebuffer_ = null;
/**
* @type {goog.math.Size}
* @private
* @type {goog.math.Size}
*/
this.framebufferSize_ = null;
/**
* @private
* @type {Object.<number, number>}
*/
this.tileChangeListenerKeys_ = {};
};
goog.inherits(ol.webgl.TileLayerRenderer, ol.webgl.LayerRenderer);
@@ -136,33 +148,86 @@ ol.webgl.TileLayerRenderer.prototype.disposeInternal = function() {
};
/**
* @protected
*/
ol.webgl.TileLayerRenderer.prototype.handleTileChange = function() {
this.dispatchChangeEvent();
};
/**
* @inheritDoc
*/
ol.webgl.TileLayerRenderer.prototype.redraw = function() {
var gl = this.getGL();
var map = /** @type {ol.webgl.Map} */ (this.getMap());
var extent = map.getExtent();
var resolution = map.getResolution();
if (!goog.isDef(extent) || !goog.isDef(resolution)) {
return;
}
var tileLayer = /** @type {ol.TileLayer} */ (this.getLayer());
var tileStore = tileLayer.getTileStore();
var tileGrid = tileStore.getTileGrid();
var z = tileGrid.getZForResolution(resolution);
var tileBounds = tileGrid.getExtentTileBounds(z, extent);
var tileSize = tileGrid.getTileSize();
this.size_ = new goog.math.Size(
tileSize.width * (tileBounds.maxX - tileBounds.minX),
tileSize.height * (tileBounds.maxY - tileBounds.minY));
this.bindFramebuffer_();
var size = new goog.math.Size(
tileSize.width * (tileBounds.maxX - tileBounds.minX + 1),
tileSize.height * (tileBounds.maxY - tileBounds.minY + 1));
if (goog.isNull(this.textureSize_) ||
!goog.math.Size.equals(this.textureSize_, size)) {
if (!goog.isNull(this.texture_)) {
gl.deleteTexture(this.texture_);
}
var texture = gl.createTexture();
gl.bindTexture(goog.webgl.TEXTURE_2D, texture);
gl.texImage2D(goog.webgl.TEXTURE_2D, 0, gl.RGBA, size.width, size.height,
0, goog.webgl.RGBA, goog.webgl.UNSIGNED_BYTE, null);
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MAG_FILTER,
goog.webgl.NEAREST);
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MIN_FILTER,
goog.webgl.NEAREST);
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_WRAP_S,
goog.webgl.REPEAT);
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_WRAP_T,
goog.webgl.REPEAT);
this.texture_ = texture;
this.textureSize_ = size;
} else {
gl.bindTexture(goog.webgl.TEXTURE_2D, this.texture_);
}
tileBounds.forEachTileCoord(z, function(tileCoord) {
var x = tileCoord.x;
var y = tileCoord.y;
var deltaX = tileCoord.x - tileBounds.minX;
var deltaY = tileCoord.y - tileBounds.minY;
var tile = tileStore.getTile(tileCoord);
if (tile.isLoaded()) {
var x = tileSize.width * (tileCoord.x - tileBounds.minX);
var y = tileSize.height * (tileCoord.y - tileBounds.minY);
gl.texSubImage2D(goog.webgl.TEXTURE_2D, 0,
x, y, tileSize.width, tileSize.height,
goog.webgl.RGBA, goog.webgl.UNSIGNED_BYTE, tile.getImage());
} else {
var key = goog.getUid(tile);
if (!(key in this.tileChangeListenerKeys_)) {
tile.load();
// FIXME will need to handle aborts as well
this.tileChangeListenerKeys_[key] = goog.events.listen(tile,
goog.events.EventType.CHANGE, this.handleTileChange, false, this);
}
}
return false;
}, this);
};