openlayers

<!doctype html> <html lang="en"> <head> <title>Code coverage report for ol/renderer/canvas/canvastilelayerrenderer.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../../prettify.css" /> <link rel="stylesheet" href="../../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../../index.html">all files</a> / <a href="index.html">ol/renderer/canvas/</a> canvastilelayerrenderer.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 78.42% Statements 149/190 </div> <div class='fl pad1y space-right2'> 52.63% Branches 30/57 </div> <div class='fl pad1y space-right2'> 80% Functions 4/5 </div> <div class='fl pad1y space-right2'> 78.42% Lines 149/190 </div> </div> </div> <div class='status-line medium'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475</td><td class="line-coverage quiet">      1×   1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1×                 1×   3×           3×           3×           3×           3×           3×           3×           3×           3×           3×           3×           3×           3×     1×           1× 2×             1× 2×             1×                                                                                                                                   2× 2× 2×   2× 2×   2× 2× 2× 2× 2×   2×   2× 2× 2× 2× 2× 2× 2×           2×     2×         2×     2× 2×   2× 2× 1×   1×   1×   1× 1× 1× 1× 1×     1×   1×   1× 1× 1×                               1× 1× 1×             2× 2× 1× 1× 1×   1×   1× 1× 1× 1×     1×   1×   1× 1×     2×           2× 2×   2×   2×     2×   2× 2× 2× 2× 4×   4× 4× 4×     2× 2×     2×   2×     2× 2×   2× 2×             2× 2× 2× 2× 2× 2×       2× 2× 2× 2×     2× 2× 2× 2× 2× 2×   2× 2× 2× 2× 2×     2× 2× 2× 2× 2×     2×   2× 2×       2×                                                                           2× 2×   2× 2×   2×               2×   2×             1×                                              </td><td class="text"><pre class="prettyprint lang-js">// FIXME find correct globalCompositeOperation // FIXME optimize :-)   goog.provide('ol.renderer.canvas.TileLayer');   goog.require('goog.array'); goog.require('goog.asserts'); goog.require('goog.vec.Mat4'); goog.require('ol.Size'); goog.require('ol.TileRange'); goog.require('ol.TileState'); goog.require('ol.dom'); goog.require('ol.extent'); goog.require('ol.layer.Tile'); goog.require('ol.renderer.canvas.Layer'); goog.require('ol.size'); goog.require('ol.tilecoord'); goog.require('ol.vec.Mat4');       /** * @constructor * @extends {ol.renderer.canvas.Layer} * @param {ol.layer.Tile} tileLayer Tile layer. */ ol.renderer.canvas.TileLayer = function(tileLayer) {   goog.base(this, tileLayer);   /** * @private * @type {HTMLCanvasElement} */ this.canvas_ = null;   /** * @private * @type {ol.Size} */ this.canvasSize_ = null;   /** * @private * @type {boolean} */ this.canvasTooBig_ = false;   /** * @private * @type {CanvasRenderingContext2D} */ this.context_ = null;   /** * @private * @type {!goog.vec.Mat4.Number} */ this.imageTransform_ = goog.vec.Mat4.createNumber();   /** * @private * @type {?goog.vec.Mat4.Number} */ this.imageTransformInv_ = null;   /** * @private * @type {number} */ this.renderedCanvasZ_ = NaN;   /** * @private * @type {number} */ this.renderedTileWidth_ = NaN;   /** * @private * @type {number} */ this.renderedTileHeight_ = NaN;   /** * @private * @type {ol.TileRange} */ this.renderedCanvasTileRange_ = null;   /** * @private * @type {Array.<ol.Tile|undefined>} */ this.renderedTiles_ = null;   /** * @private * @type {ol.Size} */ this.tmpSize_ = [0, 0];   }; goog.inherits(ol.renderer.canvas.TileLayer, ol.renderer.canvas.Layer);     /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.getImage = function() { return this.canvas_; };     /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.getImageTransform = function() { return this.imageTransform_; };     /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.prepareFrame = function(frameState, layerState) {   // // Warning! You're entering a dangerous zone! // // The canvas tile layer renderering is highly optimized, hence // the complexity of this function. For best performance we try // to minimize the number of pixels to update on the canvas. This // includes: // // - Only drawing pixels that will be visible. // - Not re-drawing pixels/tiles that are already correct. // - Minimizing calls to clearRect. // - Never shrink the canvas. Just make it bigger when necessary. // Re-sizing the canvas also clears it, which further means // re-creating it (expensive). // // The various steps performed by this functions: // // - Create a canvas element if none has been created yet. // // - Make the canvas bigger if it's too small. Note that we never shrink // the canvas, we just make it bigger when necessary, when rotating for // example. Note also that the canvas always contains a whole number // of tiles. // // - Invalidate the canvas tile range (renderedCanvasTileRange_ = null) // if (1) the canvas has been enlarged, or (2) the zoom level changes, // or (3) the canvas tile range doesn't contain the required tile // range. This canvas tile range invalidation thing is related to // an optimization where we attempt to redraw as few pixels as // possible on each prepareFrame call. // // - If the canvas tile range has been invalidated we reset // renderedCanvasTileRange_ and reset the renderedTiles_ array. // The renderedTiles_ array is the structure used to determine // the canvas pixels that need not be redrawn from one prepareFrame // call to another. It records while tile has been rendered at // which position in the canvas. // // - We then determine the tiles to draw on the canvas. Tiles for // the target resolution may not be loaded yet. In that case we // use low-resolution/interim tiles if loaded already. And, if // for a non-yet-loaded tile we haven't found a corresponding // low-resolution tile we indicate that the pixels for that // tile must be cleared on the canvas. Note: determining the // interim tiles is based on tile extents instead of tile // coords, this is to be able to handler irregular tile grids. // // - We're now ready to render. We start by calling clearRect // for the tiles that aren't loaded yet and are not fully covered // by a low-resolution tile (if they're loaded, we'll draw them; // if they're fully covered by a low-resolution tile then there's // no need to clear). We then render the tiles "back to front", // i.e. starting with the low-resolution tiles. // // - After rendering some bookkeeping is performed (updateUsedTiles, // etc.). manageTilePyramid is what enqueue tiles in the tile // queue for loading. // // - The last step involves updating the image transform matrix, // which will be used by the map renderer for the final // composition and positioning. //   var pixelRatio = frameState.pixelRatio; var viewState = frameState.viewState; var projection = viewState.projection;   var tileLayer = this.getLayer(); goog.asserts.assertInstanceof(tileLayer, ol.layer.Tile, 'layer is an instance of ol.layer.Tile'); var tileSource = tileLayer.getSource(); var tileGrid = tileSource.getTileGridForProjection(projection); var tileGutter = tileSource.getGutter(); var z = tileGrid.getZForResolution(viewState.resolution); var tilePixelSize = tileSource.getTilePixelSize(z, frameState.pixelRatio, projection); var tilePixelRatio = tilePixelSize[0] / ol.size.toSize(tileGrid.getTileSize(z), this.tmpSize_)[0]; var tileResolution = tileGrid.getResolution(z); var tilePixelResolution = tileResolution / tilePixelRatio; var center = viewState.center; var extent; Eif (tileResolution == viewState.resolution) { center = this.snapCenterToPixel(center, tileResolution, frameState.size); extent = ol.extent.getForViewAndSize( center, tileResolution, viewState.rotation, frameState.size); } else { extent = frameState.extent; }   Iif (layerState.extent !== undefined) { extent = ol.extent.getIntersection(extent, layerState.extent); } Iif (ol.extent.isEmpty(extent)) { // Return false to prevent the rendering of the layer. return false; }   var tileRange = tileGrid.getTileRangeForExtentAndResolution( extent, tileResolution);   var canvasWidth = tilePixelSize[0] * tileRange.getWidth(); var canvasHeight = tilePixelSize[1] * tileRange.getHeight();   var canvas, context; if (!this.canvas_) { goog.asserts.assert(!this.canvasSize_, 'canvasSize is null (because canvas is null)'); goog.asserts.assert(!this.context_, 'context is null (because canvas is null)'); goog.asserts.assert(!this.renderedCanvasTileRange_, 'renderedCanvasTileRange is null (because canvas is null)'); context = ol.dom.createCanvasContext2D(canvasWidth, canvasHeight); this.canvas_ = context.canvas; this.canvasSize_ = [canvasWidth, canvasHeight]; this.context_ = context; this.canvasTooBig_ = !ol.renderer.canvas.Layer.testCanvasSize(this.canvasSize_); } else { goog.asserts.assert(this.canvasSize_, 'non-null canvasSize (because canvas is not null)'); goog.asserts.assert(this.context_, 'non-null context (because canvas is not null)'); canvas = this.canvas_; context = this.context_; Iif (this.canvasSize_[0] < canvasWidth || this.canvasSize_[1] < canvasHeight || this.renderedTileWidth_ !== tilePixelSize[0] || this.renderedTileHeight_ !== tilePixelSize[1] || (this.canvasTooBig_ && (this.canvasSize_[0] > canvasWidth || this.canvasSize_[1] > canvasHeight))) { // Canvas is too small or tileSize has changed, resize it. // We never shrink the canvas, unless // we know that the current canvas size exceeds the maximum size canvas.width = canvasWidth; canvas.height = canvasHeight; this.canvasSize_ = [canvasWidth, canvasHeight]; this.canvasTooBig_ = !ol.renderer.canvas.Layer.testCanvasSize(this.canvasSize_); this.renderedCanvasTileRange_ = null; } else { canvasWidth = this.canvasSize_[0]; canvasHeight = this.canvasSize_[1]; Iif (z != this.renderedCanvasZ_ || !this.renderedCanvasTileRange_.containsTileRange(tileRange)) { this.renderedCanvasTileRange_ = null; } } }   var canvasTileRange, canvasTileRangeWidth, minX, minY; if (!this.renderedCanvasTileRange_) { canvasTileRangeWidth = canvasWidth / tilePixelSize[0]; var canvasTileRangeHeight = canvasHeight / tilePixelSize[1]; minX = tileRange.minX - Math.floor((canvasTileRangeWidth - tileRange.getWidth()) / 2); minY = tileRange.minY - Math.floor((canvasTileRangeHeight - tileRange.getHeight()) / 2); this.renderedCanvasZ_ = z; this.renderedTileWidth_ = tilePixelSize[0]; this.renderedTileHeight_ = tilePixelSize[1]; this.renderedCanvasTileRange_ = new ol.TileRange( minX, minX + canvasTileRangeWidth - 1, minY, minY + canvasTileRangeHeight - 1); this.renderedTiles_ = new Array(canvasTileRangeWidth * canvasTileRangeHeight); canvasTileRange = this.renderedCanvasTileRange_; } else { canvasTileRange = this.renderedCanvasTileRange_; canvasTileRangeWidth = canvasTileRange.getWidth(); }   goog.asserts.assert(canvasTileRange.containsTileRange(tileRange), 'tileRange is contained in canvasTileRange');   /** * @type {Object.<number, Object.<string, ol.Tile>>} */ var tilesToDrawByZ = {}; tilesToDrawByZ[z] = {}; /** @type {Array.<ol.Tile>} */ var tilesToClear = [];   var findLoadedTiles = this.createLoadedTileFinder( tileSource, projection, tilesToDrawByZ);   var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();   var tmpExtent = ol.extent.createEmpty(); var tmpTileRange = new ol.TileRange(0, 0, 0, 0); var childTileRange, fullyLoaded, tile, tileState, x, y; for (x = tileRange.minX; x <= tileRange.maxX; ++x) { for (y = tileRange.minY; y <= tileRange.maxY; ++y) {   tile = tileSource.getTile(z, x, y, pixelRatio, projection); tileState = tile.getState(); if (tileState == ol.TileState.LOADED || tileState == ol.TileState.EMPTY || (tileState == ol.TileState.ERROR && !useInterimTilesOnError)) { tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile; continue; }   fullyLoaded = tileGrid.forEachTileCoordParentTileRange( tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent); Eif (!fullyLoaded) { // FIXME we do not need to clear the tile if it is fully covered by its // children tilesToClear.push(tile); childTileRange = tileGrid.getTileCoordChildTileRange( tile.tileCoord, tmpTileRange, tmpExtent); Eif (childTileRange) { findLoadedTiles(z + 1, childTileRange); } }   } }   var i, ii; for (i = 0, ii = tilesToClear.length; i < ii; ++i) { tile = tilesToClear[i]; x = tilePixelSize[0] * (tile.tileCoord[1] - canvasTileRange.minX); y = tilePixelSize[1] * (canvasTileRange.maxY - tile.tileCoord[2]); context.clearRect(x, y, tilePixelSize[0], tilePixelSize[1]); }   /** @type {Array.<number>} */ var zs = Object.keys(tilesToDrawByZ).map(Number); goog.array.sort(zs); var opaque = tileSource.getOpaque(); var origin = ol.extent.getTopLeft(tileGrid.getTileCoordExtent( [z, canvasTileRange.minX, canvasTileRange.maxY], tmpExtent)); var currentZ, index, scale, tileCoordKey, tileExtent, tilesToDraw; var ix, iy, interimTileRange, maxX, maxY; var height, width; for (i = 0, ii = zs.length; i < ii; ++i) { currentZ = zs[i]; tilePixelSize = tileSource.getTilePixelSize(currentZ, pixelRatio, projection); tilesToDraw = tilesToDrawByZ[currentZ]; Eif (currentZ == z) { for (tileCoordKey in tilesToDraw) { tile = tilesToDraw[tileCoordKey]; index = (tile.tileCoord[2] - canvasTileRange.minY) * canvasTileRangeWidth + (tile.tileCoord[1] - canvasTileRange.minX); Eif (this.renderedTiles_[index] != tile) { x = tilePixelSize[0] * (tile.tileCoord[1] - canvasTileRange.minX); y = tilePixelSize[1] * (canvasTileRange.maxY - tile.tileCoord[2]); tileState = tile.getState(); Eif (tileState == ol.TileState.EMPTY || (tileState == ol.TileState.ERROR && !useInterimTilesOnError) || !opaque) { context.clearRect(x, y, tilePixelSize[0], tilePixelSize[1]); } Eif (tileState == ol.TileState.LOADED) { context.drawImage(tile.getImage(), tileGutter, tileGutter, tilePixelSize[0], tilePixelSize[1], x, y, tilePixelSize[0], tilePixelSize[1]); } this.renderedTiles_[index] = tile; } } } else { scale = tileGrid.getResolution(currentZ) / tileResolution; for (tileCoordKey in tilesToDraw) { tile = tilesToDraw[tileCoordKey]; tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent); x = (tileExtent[0] - origin[0]) / tilePixelResolution; y = (origin[1] - tileExtent[3]) / tilePixelResolution; width = scale * tilePixelSize[0]; height = scale * tilePixelSize[1]; tileState = tile.getState(); if (tileState == ol.TileState.EMPTY || !opaque) { context.clearRect(x, y, width, height); } if (tileState == ol.TileState.LOADED) { context.drawImage(tile.getImage(), tileGutter, tileGutter, tilePixelSize[0], tilePixelSize[1], x, y, width, height); } interimTileRange = tileGrid.getTileRangeForExtentAndZ(tileExtent, z, tmpTileRange); minX = Math.max(interimTileRange.minX, canvasTileRange.minX); maxX = Math.min(interimTileRange.maxX, canvasTileRange.maxX); minY = Math.max(interimTileRange.minY, canvasTileRange.minY); maxY = Math.min(interimTileRange.maxY, canvasTileRange.maxY); for (ix = minX; ix <= maxX; ++ix) { for (iy = minY; iy <= maxY; ++iy) { index = (iy - canvasTileRange.minY) * canvasTileRangeWidth + (ix - canvasTileRange.minX); this.renderedTiles_[index] = undefined; } } } } }   this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange); this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio, projection, extent, z, tileLayer.getPreload()); this.scheduleExpireCache(frameState, tileSource); this.updateLogos(frameState, tileSource);   ol.vec.Mat4.makeTransform2D(this.imageTransform_, pixelRatio * frameState.size[0] / 2, pixelRatio * frameState.size[1] / 2, pixelRatio * tilePixelResolution / viewState.resolution, pixelRatio * tilePixelResolution / viewState.resolution, viewState.rotation, (origin[0] - center[0]) / tilePixelResolution, (center[1] - origin[1]) / tilePixelResolution); this.imageTransformInv_ = null;   return true; };     /** * @inheritDoc */ ol.renderer.canvas.TileLayer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) { if (!this.context_) { return undefined; }   if (!this.imageTransformInv_) { this.imageTransformInv_ = goog.vec.Mat4.createNumber(); goog.vec.Mat4.invert(this.imageTransform_, this.imageTransformInv_); }   var pixelOnCanvas = this.getPixelOnCanvas(pixel, this.imageTransformInv_);   var imageData = this.context_.getImageData( pixelOnCanvas[0], pixelOnCanvas[1], 1, 1).data;   if (imageData[3] > 0) { return callback.call(thisArg, this.getLayer()); } else { return undefined; } };  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="http://istanbul-js.org/" target="_blank">istanbul</a> at Fri Nov 06 2015 19:36:11 GMT+0100 (CET) </div> </div> <script src="../../../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); 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