Imports cased like the filename
This commit is contained in:
Tim Schaub
408
src/ol/renderer/webgl/TileLayer.js
Normal file
408
src/ol/renderer/webgl/TileLayer.js
Normal file
@@ -0,0 +1,408 @@
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// FIXME large resolutions lead to too large framebuffers :-(
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// FIXME animated shaders! check in redraw
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goog.provide('ol.renderer.webgl.TileLayer');
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goog.require('ol');
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goog.require('ol.LayerType');
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goog.require('ol.TileRange');
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goog.require('ol.TileState');
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goog.require('ol.array');
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goog.require('ol.extent');
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goog.require('ol.math');
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goog.require('ol.renderer.Type');
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goog.require('ol.renderer.webgl.Layer');
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goog.require('ol.renderer.webgl.tilelayershader');
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goog.require('ol.renderer.webgl.tilelayershader.Locations');
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goog.require('ol.size');
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goog.require('ol.transform');
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goog.require('ol.webgl');
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goog.require('ol.webgl.Buffer');
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/**
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* @constructor
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* @extends {ol.renderer.webgl.Layer}
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* @param {ol.renderer.webgl.Map} mapRenderer Map renderer.
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* @param {ol.layer.Tile} tileLayer Tile layer.
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* @api
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*/
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ol.renderer.webgl.TileLayer = function(mapRenderer, tileLayer) {
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ol.renderer.webgl.Layer.call(this, mapRenderer, tileLayer);
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/**
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* @private
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* @type {ol.webgl.Fragment}
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*/
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this.fragmentShader_ = ol.renderer.webgl.tilelayershader.fragment;
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/**
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* @private
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* @type {ol.webgl.Vertex}
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*/
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this.vertexShader_ = ol.renderer.webgl.tilelayershader.vertex;
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/**
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* @private
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* @type {ol.renderer.webgl.tilelayershader.Locations}
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*/
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this.locations_ = null;
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/**
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* @private
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* @type {ol.webgl.Buffer}
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*/
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this.renderArrayBuffer_ = new ol.webgl.Buffer([
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0, 0, 0, 1,
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1, 0, 1, 1,
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0, 1, 0, 0,
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1, 1, 1, 0
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]);
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/**
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* @private
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* @type {ol.TileRange}
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*/
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this.renderedTileRange_ = null;
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/**
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* @private
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* @type {ol.Extent}
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*/
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this.renderedFramebufferExtent_ = null;
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/**
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* @private
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* @type {number}
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*/
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this.renderedRevision_ = -1;
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/**
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* @private
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* @type {ol.Size}
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*/
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this.tmpSize_ = [0, 0];
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};
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ol.inherits(ol.renderer.webgl.TileLayer, ol.renderer.webgl.Layer);
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/**
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* Determine if this renderer handles the provided layer.
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* @param {ol.renderer.Type} type The renderer type.
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* @param {ol.layer.Layer} layer The candidate layer.
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* @return {boolean} The renderer can render the layer.
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*/
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ol.renderer.webgl.TileLayer['handles'] = function(type, layer) {
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return type === ol.renderer.Type.WEBGL && layer.getType() === ol.LayerType.TILE;
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};
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/**
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* Create a layer renderer.
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* @param {ol.renderer.Map} mapRenderer The map renderer.
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* @param {ol.layer.Layer} layer The layer to be rendererd.
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* @return {ol.renderer.webgl.TileLayer} The layer renderer.
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*/
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ol.renderer.webgl.TileLayer['create'] = function(mapRenderer, layer) {
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return new ol.renderer.webgl.TileLayer(
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/** @type {ol.renderer.webgl.Map} */ (mapRenderer),
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/** @type {ol.layer.Tile} */ (layer)
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);
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.TileLayer.prototype.disposeInternal = function() {
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var context = this.mapRenderer.getContext();
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context.deleteBuffer(this.renderArrayBuffer_);
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ol.renderer.webgl.Layer.prototype.disposeInternal.call(this);
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.TileLayer.prototype.createLoadedTileFinder = function(source, projection, tiles) {
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var mapRenderer = this.mapRenderer;
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return (
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/**
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* @param {number} zoom Zoom level.
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* @param {ol.TileRange} tileRange Tile range.
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* @return {boolean} The tile range is fully loaded.
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*/
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function(zoom, tileRange) {
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function callback(tile) {
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var loaded = mapRenderer.isTileTextureLoaded(tile);
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if (loaded) {
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if (!tiles[zoom]) {
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tiles[zoom] = {};
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}
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tiles[zoom][tile.tileCoord.toString()] = tile;
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}
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return loaded;
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}
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return source.forEachLoadedTile(projection, zoom, tileRange, callback);
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});
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.TileLayer.prototype.handleWebGLContextLost = function() {
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ol.renderer.webgl.Layer.prototype.handleWebGLContextLost.call(this);
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this.locations_ = null;
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.TileLayer.prototype.prepareFrame = function(frameState, layerState, context) {
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var mapRenderer = this.mapRenderer;
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var gl = context.getGL();
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var viewState = frameState.viewState;
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var projection = viewState.projection;
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var tileLayer = /** @type {ol.layer.Tile} */ (this.getLayer());
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var tileSource = tileLayer.getSource();
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var tileGrid = tileSource.getTileGridForProjection(projection);
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var z = tileGrid.getZForResolution(viewState.resolution);
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var tileResolution = tileGrid.getResolution(z);
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var tilePixelSize =
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tileSource.getTilePixelSize(z, frameState.pixelRatio, projection);
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var pixelRatio = tilePixelSize[0] /
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ol.size.toSize(tileGrid.getTileSize(z), this.tmpSize_)[0];
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var tilePixelResolution = tileResolution / pixelRatio;
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var tileGutter = tileSource.getTilePixelRatio(pixelRatio) * tileSource.getGutter(projection);
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var center = viewState.center;
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var extent = frameState.extent;
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var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);
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var framebufferExtent;
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if (this.renderedTileRange_ &&
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this.renderedTileRange_.equals(tileRange) &&
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this.renderedRevision_ == tileSource.getRevision()) {
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framebufferExtent = this.renderedFramebufferExtent_;
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} else {
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var tileRangeSize = tileRange.getSize();
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var maxDimension = Math.max(
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tileRangeSize[0] * tilePixelSize[0],
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tileRangeSize[1] * tilePixelSize[1]);
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var framebufferDimension = ol.math.roundUpToPowerOfTwo(maxDimension);
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var framebufferExtentDimension = tilePixelResolution * framebufferDimension;
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var origin = tileGrid.getOrigin(z);
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var minX = origin[0] +
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tileRange.minX * tilePixelSize[0] * tilePixelResolution;
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var minY = origin[1] +
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tileRange.minY * tilePixelSize[1] * tilePixelResolution;
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framebufferExtent = [
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minX, minY,
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minX + framebufferExtentDimension, minY + framebufferExtentDimension
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];
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this.bindFramebuffer(frameState, framebufferDimension);
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gl.viewport(0, 0, framebufferDimension, framebufferDimension);
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gl.clearColor(0, 0, 0, 0);
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gl.clear(ol.webgl.COLOR_BUFFER_BIT);
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gl.disable(ol.webgl.BLEND);
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var program = context.getProgram(this.fragmentShader_, this.vertexShader_);
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context.useProgram(program);
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if (!this.locations_) {
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this.locations_ = new ol.renderer.webgl.tilelayershader.Locations(gl, program);
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}
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context.bindBuffer(ol.webgl.ARRAY_BUFFER, this.renderArrayBuffer_);
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gl.enableVertexAttribArray(this.locations_.a_position);
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gl.vertexAttribPointer(
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this.locations_.a_position, 2, ol.webgl.FLOAT, false, 16, 0);
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gl.enableVertexAttribArray(this.locations_.a_texCoord);
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gl.vertexAttribPointer(
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this.locations_.a_texCoord, 2, ol.webgl.FLOAT, false, 16, 8);
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gl.uniform1i(this.locations_.u_texture, 0);
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/**
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* @type {Object.<number, Object.<string, ol.Tile>>}
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*/
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var tilesToDrawByZ = {};
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tilesToDrawByZ[z] = {};
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var findLoadedTiles = this.createLoadedTileFinder(
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tileSource, projection, tilesToDrawByZ);
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var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();
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var allTilesLoaded = true;
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var tmpExtent = ol.extent.createEmpty();
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var tmpTileRange = new ol.TileRange(0, 0, 0, 0);
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var childTileRange, drawable, fullyLoaded, tile, tileState;
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var x, y, tileExtent;
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for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
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for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
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tile = tileSource.getTile(z, x, y, pixelRatio, projection);
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if (layerState.extent !== undefined) {
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// ignore tiles outside layer extent
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tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);
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if (!ol.extent.intersects(tileExtent, layerState.extent)) {
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continue;
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}
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}
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tileState = tile.getState();
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drawable = tileState == ol.TileState.LOADED ||
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tileState == ol.TileState.EMPTY ||
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tileState == ol.TileState.ERROR && !useInterimTilesOnError;
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if (!drawable) {
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tile = tile.getInterimTile();
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}
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tileState = tile.getState();
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if (tileState == ol.TileState.LOADED) {
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if (mapRenderer.isTileTextureLoaded(tile)) {
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tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;
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continue;
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}
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} else if (tileState == ol.TileState.EMPTY ||
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(tileState == ol.TileState.ERROR &&
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!useInterimTilesOnError)) {
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continue;
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}
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allTilesLoaded = false;
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fullyLoaded = tileGrid.forEachTileCoordParentTileRange(
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tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);
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if (!fullyLoaded) {
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childTileRange = tileGrid.getTileCoordChildTileRange(
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tile.tileCoord, tmpTileRange, tmpExtent);
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if (childTileRange) {
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findLoadedTiles(z + 1, childTileRange);
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}
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}
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}
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}
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/** @type {Array.<number>} */
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var zs = Object.keys(tilesToDrawByZ).map(Number);
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zs.sort(ol.array.numberSafeCompareFunction);
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var u_tileOffset = new Float32Array(4);
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var i, ii, tileKey, tilesToDraw;
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for (i = 0, ii = zs.length; i < ii; ++i) {
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tilesToDraw = tilesToDrawByZ[zs[i]];
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for (tileKey in tilesToDraw) {
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tile = tilesToDraw[tileKey];
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tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);
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u_tileOffset[0] = 2 * (tileExtent[2] - tileExtent[0]) /
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framebufferExtentDimension;
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u_tileOffset[1] = 2 * (tileExtent[3] - tileExtent[1]) /
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framebufferExtentDimension;
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u_tileOffset[2] = 2 * (tileExtent[0] - framebufferExtent[0]) /
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framebufferExtentDimension - 1;
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u_tileOffset[3] = 2 * (tileExtent[1] - framebufferExtent[1]) /
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framebufferExtentDimension - 1;
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gl.uniform4fv(this.locations_.u_tileOffset, u_tileOffset);
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mapRenderer.bindTileTexture(tile, tilePixelSize,
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tileGutter * pixelRatio, ol.webgl.LINEAR, ol.webgl.LINEAR);
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gl.drawArrays(ol.webgl.TRIANGLE_STRIP, 0, 4);
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}
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}
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if (allTilesLoaded) {
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this.renderedTileRange_ = tileRange;
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this.renderedFramebufferExtent_ = framebufferExtent;
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this.renderedRevision_ = tileSource.getRevision();
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} else {
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this.renderedTileRange_ = null;
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this.renderedFramebufferExtent_ = null;
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this.renderedRevision_ = -1;
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frameState.animate = true;
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}
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}
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this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);
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var tileTextureQueue = mapRenderer.getTileTextureQueue();
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this.manageTilePyramid(
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frameState, tileSource, tileGrid, pixelRatio, projection, extent, z,
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tileLayer.getPreload(),
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/**
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* @param {ol.Tile} tile Tile.
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*/
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function(tile) {
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if (tile.getState() == ol.TileState.LOADED &&
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!mapRenderer.isTileTextureLoaded(tile) &&
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!tileTextureQueue.isKeyQueued(tile.getKey())) {
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tileTextureQueue.enqueue([
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tile,
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tileGrid.getTileCoordCenter(tile.tileCoord),
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tileGrid.getResolution(tile.tileCoord[0]),
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tilePixelSize, tileGutter * pixelRatio
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]);
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}
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}, this);
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this.scheduleExpireCache(frameState, tileSource);
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this.updateLogos(frameState, tileSource);
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var texCoordMatrix = this.texCoordMatrix;
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ol.transform.reset(texCoordMatrix);
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ol.transform.translate(texCoordMatrix,
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(Math.round(center[0] / tileResolution) * tileResolution - framebufferExtent[0]) /
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(framebufferExtent[2] - framebufferExtent[0]),
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(Math.round(center[1] / tileResolution) * tileResolution - framebufferExtent[1]) /
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(framebufferExtent[3] - framebufferExtent[1]));
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if (viewState.rotation !== 0) {
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ol.transform.rotate(texCoordMatrix, viewState.rotation);
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}
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ol.transform.scale(texCoordMatrix,
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frameState.size[0] * viewState.resolution /
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(framebufferExtent[2] - framebufferExtent[0]),
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frameState.size[1] * viewState.resolution /
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(framebufferExtent[3] - framebufferExtent[1]));
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ol.transform.translate(texCoordMatrix, -0.5, -0.5);
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return true;
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.webgl.TileLayer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {
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if (!this.framebuffer) {
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return undefined;
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}
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var pixelOnMapScaled = [
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pixel[0] / frameState.size[0],
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(frameState.size[1] - pixel[1]) / frameState.size[1]];
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var pixelOnFrameBufferScaled = ol.transform.apply(
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this.texCoordMatrix, pixelOnMapScaled.slice());
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var pixelOnFrameBuffer = [
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pixelOnFrameBufferScaled[0] * this.framebufferDimension,
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pixelOnFrameBufferScaled[1] * this.framebufferDimension];
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var gl = this.mapRenderer.getContext().getGL();
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gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);
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var imageData = new Uint8Array(4);
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gl.readPixels(pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1,
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gl.RGBA, gl.UNSIGNED_BYTE, imageData);
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if (imageData[3] > 0) {
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return callback.call(thisArg, this.getLayer(), imageData);
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} else {
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return undefined;
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}
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};
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