486 lines
14 KiB
JavaScript
486 lines
14 KiB
JavaScript
// FIXME large resolutions lead to too large framebuffers :-(
|
|
// FIXME animated shaders! check in redraw
|
|
|
|
goog.provide('ol.renderer.webgl.TileLayer');
|
|
goog.provide('ol.renderer.webgl.tilelayerrenderer');
|
|
goog.provide('ol.renderer.webgl.tilelayerrenderer.shader.Fragment');
|
|
goog.provide('ol.renderer.webgl.tilelayerrenderer.shader.Vertex');
|
|
|
|
goog.require('goog.array');
|
|
goog.require('goog.asserts');
|
|
goog.require('goog.events.EventType');
|
|
goog.require('goog.object');
|
|
goog.require('goog.structs.PriorityQueue');
|
|
goog.require('goog.vec.Mat4');
|
|
goog.require('goog.vec.Vec4');
|
|
goog.require('goog.webgl');
|
|
goog.require('ol.Coordinate');
|
|
goog.require('ol.FrameState');
|
|
goog.require('ol.Size');
|
|
goog.require('ol.TileState');
|
|
goog.require('ol.layer.TileLayer');
|
|
goog.require('ol.renderer.webgl.FragmentShader');
|
|
goog.require('ol.renderer.webgl.Layer');
|
|
goog.require('ol.renderer.webgl.VertexShader');
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.renderer.webgl.FragmentShader}
|
|
*/
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Fragment = function() {
|
|
goog.base(this, [
|
|
'precision mediump float;',
|
|
'',
|
|
'uniform sampler2D uTexture;',
|
|
'',
|
|
'varying vec2 vTexCoord;',
|
|
'',
|
|
'void main(void) {',
|
|
' gl_FragColor = texture2D(uTexture, vTexCoord);',
|
|
'}'
|
|
].join('\n'));
|
|
};
|
|
goog.inherits(
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Fragment,
|
|
ol.renderer.webgl.FragmentShader);
|
|
goog.addSingletonGetter(ol.renderer.webgl.tilelayerrenderer.shader.Fragment);
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.renderer.webgl.VertexShader}
|
|
*/
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Vertex = function() {
|
|
goog.base(this, [
|
|
'attribute vec2 aPosition;',
|
|
'attribute vec2 aTexCoord;',
|
|
'',
|
|
'varying vec2 vTexCoord;',
|
|
'',
|
|
'uniform vec4 uTileOffset;',
|
|
'',
|
|
'void main(void) {',
|
|
' gl_Position.xy = aPosition * uTileOffset.xy + uTileOffset.zw;',
|
|
' gl_Position.z = 0.;',
|
|
' gl_Position.w = 1.;',
|
|
' vTexCoord = aTexCoord;',
|
|
'}'
|
|
].join('\n'));
|
|
};
|
|
goog.inherits(
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Vertex,
|
|
ol.renderer.webgl.VertexShader);
|
|
goog.addSingletonGetter(ol.renderer.webgl.tilelayerrenderer.shader.Vertex);
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.renderer.webgl.Layer}
|
|
* @param {ol.renderer.Map} mapRenderer Map renderer.
|
|
* @param {ol.layer.TileLayer} tileLayer Tile layer.
|
|
*/
|
|
ol.renderer.webgl.TileLayer = function(mapRenderer, tileLayer) {
|
|
|
|
goog.base(this, mapRenderer, tileLayer);
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.renderer.webgl.FragmentShader}
|
|
*/
|
|
this.fragmentShader_ =
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Fragment.getInstance();
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.renderer.webgl.VertexShader}
|
|
*/
|
|
this.vertexShader_ =
|
|
ol.renderer.webgl.tilelayerrenderer.shader.Vertex.getInstance();
|
|
|
|
/**
|
|
* @private
|
|
* @type {{aPosition: number,
|
|
* aTexCoord: number,
|
|
* uTileOffset: WebGLUniformLocation,
|
|
* uTexture: WebGLUniformLocation}|null}
|
|
*/
|
|
this.locations_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {WebGLBuffer}
|
|
*/
|
|
this.arrayBuffer_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {WebGLTexture}
|
|
*/
|
|
this.texture_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {WebGLFramebuffer}
|
|
*/
|
|
this.framebuffer_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {number|undefined}
|
|
*/
|
|
this.framebufferDimension_ = undefined;
|
|
|
|
/**
|
|
* @private
|
|
* @type {!goog.vec.Mat4.Number}
|
|
*/
|
|
this.matrix_ = goog.vec.Mat4.createNumber();
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.TileRange}
|
|
*/
|
|
this.renderedTileRange_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.Extent}
|
|
*/
|
|
this.renderedFramebufferExtent_ = null;
|
|
|
|
};
|
|
goog.inherits(ol.renderer.webgl.TileLayer, ol.renderer.webgl.Layer);
|
|
|
|
|
|
/**
|
|
* @param {ol.FrameState} frameState Frame state.
|
|
* @param {number} framebufferDimension Framebuffer dimension.
|
|
* @private
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.bindFramebuffer_ =
|
|
function(frameState, framebufferDimension) {
|
|
|
|
var mapRenderer = this.getMapRenderer();
|
|
var gl = mapRenderer.getGL();
|
|
|
|
if (!goog.isDef(this.framebufferDimension_) ||
|
|
this.framebufferDimension_ != framebufferDimension) {
|
|
|
|
var map = this.getMap();
|
|
frameState.postRenderFunctions.push(
|
|
goog.partial(function(gl, framebuffer, texture) {
|
|
if (!gl.isContextLost()) {
|
|
gl.deleteFramebuffer(framebuffer);
|
|
gl.deleteTexture(texture);
|
|
}
|
|
}, gl, this.framebuffer_, this.texture_));
|
|
|
|
var texture = gl.createTexture();
|
|
gl.bindTexture(goog.webgl.TEXTURE_2D, texture);
|
|
gl.texImage2D(goog.webgl.TEXTURE_2D, 0, goog.webgl.RGBA,
|
|
framebufferDimension, framebufferDimension, 0, goog.webgl.RGBA,
|
|
goog.webgl.UNSIGNED_BYTE, null);
|
|
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MAG_FILTER,
|
|
goog.webgl.LINEAR);
|
|
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_MIN_FILTER,
|
|
goog.webgl.LINEAR);
|
|
|
|
var framebuffer = gl.createFramebuffer();
|
|
gl.bindFramebuffer(goog.webgl.FRAMEBUFFER, framebuffer);
|
|
gl.framebufferTexture2D(goog.webgl.FRAMEBUFFER,
|
|
goog.webgl.COLOR_ATTACHMENT0, goog.webgl.TEXTURE_2D, texture, 0);
|
|
|
|
this.texture_ = texture;
|
|
this.framebuffer_ = framebuffer;
|
|
this.framebufferDimension_ = framebufferDimension;
|
|
|
|
} else {
|
|
gl.bindFramebuffer(goog.webgl.FRAMEBUFFER, this.framebuffer_);
|
|
}
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.disposeInternal = function() {
|
|
var mapRenderer = this.getMapRenderer();
|
|
var gl = mapRenderer.getGL();
|
|
if (!gl.isContextLost()) {
|
|
gl.deleteBuffer(this.arrayBuffer_);
|
|
gl.deleteFramebuffer(this.framebuffer_);
|
|
gl.deleteTexture(this.texture_);
|
|
}
|
|
goog.base(this, 'disposeInternal');
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.getMatrix = function() {
|
|
return this.matrix_;
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.getTexture = function() {
|
|
return this.texture_;
|
|
};
|
|
|
|
|
|
/**
|
|
* @return {ol.layer.TileLayer} Tile layer.
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.getTileLayer = function() {
|
|
return /** @type {ol.layer.TileLayer} */ (this.getLayer());
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.handleWebGLContextLost = function() {
|
|
this.locations_ = null;
|
|
this.arrayBuffer_ = null;
|
|
this.texture_ = null;
|
|
this.framebuffer_ = null;
|
|
this.framebufferDimension_ = undefined;
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.renderer.webgl.TileLayer.prototype.renderFrame =
|
|
function(frameState, layerState) {
|
|
|
|
var mapRenderer = this.getMapRenderer();
|
|
var gl = mapRenderer.getGL();
|
|
|
|
var view2DState = frameState.view2DState;
|
|
var center = view2DState.center;
|
|
|
|
var tileLayer = this.getTileLayer();
|
|
var tileSource = tileLayer.getTileSource();
|
|
var tileSourceKey = goog.getUid(tileSource).toString();
|
|
var tileGrid = tileSource.getTileGrid();
|
|
var z = tileGrid.getZForResolution(view2DState.resolution);
|
|
var tileResolution = tileGrid.getResolution(z);
|
|
var tileRange = tileGrid.getTileRangeForExtentAndResolution(
|
|
frameState.extent, tileResolution);
|
|
|
|
var framebufferExtent;
|
|
if (!goog.isNull(this.renderedTileRange_) &&
|
|
this.renderedTileRange_.equals(tileRange)) {
|
|
framebufferExtent = this.renderedFramebufferExtent_;
|
|
} else {
|
|
|
|
var tileRangeSize = tileRange.getSize();
|
|
var tileSize = tileGrid.getTileSize();
|
|
|
|
var maxDimension = Math.max(
|
|
tileRangeSize.width * tileSize.width,
|
|
tileRangeSize.height * tileSize.height);
|
|
var framebufferDimension =
|
|
Math.pow(2, Math.ceil(Math.log(maxDimension) / Math.log(2)));
|
|
var framebufferExtentSize = new ol.Size(
|
|
tileResolution * framebufferDimension,
|
|
tileResolution * framebufferDimension);
|
|
var origin = tileGrid.getOrigin(z);
|
|
var minX = origin.x + tileRange.minX * tileSize.width * tileResolution;
|
|
var minY = origin.y + tileRange.minY * tileSize.height * tileResolution;
|
|
framebufferExtent = new ol.Extent(
|
|
minX,
|
|
minY,
|
|
minX + framebufferExtentSize.width,
|
|
minY + framebufferExtentSize.height);
|
|
|
|
this.bindFramebuffer_(frameState, framebufferDimension);
|
|
gl.viewport(0, 0, framebufferDimension, framebufferDimension);
|
|
|
|
gl.clearColor(0, 0, 0, 0);
|
|
gl.clear(goog.webgl.COLOR_BUFFER_BIT);
|
|
gl.disable(goog.webgl.BLEND);
|
|
|
|
var program = mapRenderer.getProgram(
|
|
this.fragmentShader_, this.vertexShader_);
|
|
gl.useProgram(program);
|
|
if (goog.isNull(this.locations_)) {
|
|
this.locations_ = {
|
|
aPosition: gl.getAttribLocation(program, 'aPosition'),
|
|
aTexCoord: gl.getAttribLocation(program, 'aTexCoord'),
|
|
uTileOffset: gl.getUniformLocation(program, 'uTileOffset'),
|
|
uTexture: gl.getUniformLocation(program, 'uTexture')
|
|
};
|
|
}
|
|
|
|
if (goog.isNull(this.arrayBuffer_)) {
|
|
var arrayBuffer = gl.createBuffer();
|
|
gl.bindBuffer(goog.webgl.ARRAY_BUFFER, arrayBuffer);
|
|
gl.bufferData(goog.webgl.ARRAY_BUFFER, new Float32Array([
|
|
0, 0, 0, 1,
|
|
1, 0, 1, 1,
|
|
0, 1, 0, 0,
|
|
1, 1, 1, 0
|
|
]), goog.webgl.STATIC_DRAW);
|
|
this.arrayBuffer_ = arrayBuffer;
|
|
} else {
|
|
gl.bindBuffer(goog.webgl.ARRAY_BUFFER, this.arrayBuffer_);
|
|
}
|
|
|
|
gl.enableVertexAttribArray(this.locations_.aPosition);
|
|
gl.vertexAttribPointer(
|
|
this.locations_.aPosition, 2, goog.webgl.FLOAT, false, 16, 0);
|
|
gl.enableVertexAttribArray(this.locations_.aTexCoord);
|
|
gl.vertexAttribPointer(
|
|
this.locations_.aTexCoord, 2, goog.webgl.FLOAT, false, 16, 8);
|
|
gl.uniform1i(this.locations_.uTexture, 0);
|
|
|
|
/**
|
|
* @type {Object.<number, Object.<string, ol.Tile>>}
|
|
*/
|
|
var tilesToDrawByZ = {};
|
|
tilesToDrawByZ[z] = {};
|
|
|
|
var findInterimTiles = function(z, tileRange) {
|
|
// FIXME this could be more efficient about filling partial holes
|
|
var fullyCovered = true;
|
|
var tile, tileCoord, tileCoordKey, x, y;
|
|
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
|
|
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
|
|
tileCoord = new ol.TileCoord(z, x, y);
|
|
tileCoordKey = tileCoord.toString();
|
|
if (tilesToDrawByZ[z] && tilesToDrawByZ[z][tileCoordKey]) {
|
|
return;
|
|
}
|
|
tile = tileSource.getTile(tileCoord);
|
|
if (!goog.isNull(tile) &&
|
|
tile.getState() == ol.TileState.LOADED &&
|
|
mapRenderer.isTileTextureLoaded(tile)) {
|
|
if (!tilesToDrawByZ[z]) {
|
|
tilesToDrawByZ[z] = {};
|
|
}
|
|
tilesToDrawByZ[z][tileCoordKey] = tile;
|
|
} else {
|
|
fullyCovered = false;
|
|
}
|
|
}
|
|
}
|
|
return fullyCovered;
|
|
};
|
|
|
|
var tilesToLoad = new goog.structs.PriorityQueue();
|
|
|
|
var allTilesLoaded = true;
|
|
var deltaX, deltaY, priority, tile, tileCenter, tileCoord, tileState, x, y;
|
|
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
|
|
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
|
|
|
|
tileCoord = new ol.TileCoord(z, x, y);
|
|
tile = tileSource.getTile(tileCoord);
|
|
if (goog.isNull(tile)) {
|
|
continue;
|
|
}
|
|
|
|
tileState = tile.getState();
|
|
if (tileState == ol.TileState.IDLE) {
|
|
tileCenter = tileGrid.getTileCoordCenter(tileCoord);
|
|
frameState.tileQueue.enqueue(tile, tileSourceKey, tileCenter);
|
|
} else if (tileState == ol.TileState.LOADED) {
|
|
if (mapRenderer.isTileTextureLoaded(tile)) {
|
|
tilesToDrawByZ[z][tileCoord.toString()] = tile;
|
|
continue;
|
|
} else {
|
|
tileCenter = tileGrid.getTileCoordCenter(tileCoord);
|
|
deltaX = tileCenter.x - center.x;
|
|
deltaY = tileCenter.y - center.y;
|
|
priority = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
|
|
tilesToLoad.enqueue(priority, tile);
|
|
}
|
|
} else if (tileState == ol.TileState.ERROR) {
|
|
continue;
|
|
}
|
|
|
|
allTilesLoaded = false;
|
|
tileGrid.forEachTileCoordParentTileRange(tileCoord, findInterimTiles);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/** @type {Array.<number>} */
|
|
var zs = goog.array.map(goog.object.getKeys(tilesToDrawByZ), Number);
|
|
goog.array.sort(zs);
|
|
var uTileOffset = goog.vec.Vec4.createFloat32();
|
|
goog.array.forEach(zs, function(z) {
|
|
goog.object.forEach(tilesToDrawByZ[z], function(tile) {
|
|
var tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord);
|
|
var sx = 2 * tileExtent.getWidth() / framebufferExtentSize.width;
|
|
var sy = 2 * tileExtent.getHeight() / framebufferExtentSize.height;
|
|
var tx = 2 * (tileExtent.minX - framebufferExtent.minX) /
|
|
framebufferExtentSize.width - 1;
|
|
var ty = 2 * (tileExtent.minY - framebufferExtent.minY) /
|
|
framebufferExtentSize.height - 1;
|
|
goog.vec.Vec4.setFromValues(uTileOffset, sx, sy, tx, ty);
|
|
gl.uniform4fv(this.locations_.uTileOffset, uTileOffset);
|
|
mapRenderer.bindTileTexture(tile, goog.webgl.LINEAR, goog.webgl.LINEAR);
|
|
gl.drawArrays(goog.webgl.TRIANGLE_STRIP, 0, 4);
|
|
}, this);
|
|
}, this);
|
|
|
|
if (!tilesToLoad.isEmpty()) {
|
|
frameState.postRenderFunctions.push(
|
|
goog.partial(function(mapRenderer, tilesToLoad) {
|
|
var i, tile;
|
|
// FIXME determine a suitable number of textures to upload per frame
|
|
for (i = 0; !tilesToLoad.isEmpty() && i < 4; ++i) {
|
|
tile = /** @type {ol.Tile} */ (tilesToLoad.remove());
|
|
mapRenderer.bindTileTexture(
|
|
tile, goog.webgl.LINEAR, goog.webgl.LINEAR);
|
|
}
|
|
}, mapRenderer, tilesToLoad));
|
|
}
|
|
|
|
if (allTilesLoaded) {
|
|
this.renderedTileRange_ = tileRange;
|
|
this.renderedFramebufferExtent_ = framebufferExtent;
|
|
} else {
|
|
this.renderedTileRange_ = null;
|
|
this.renderedFramebufferExtent_ = null;
|
|
frameState.animate = true;
|
|
}
|
|
|
|
}
|
|
|
|
this.updateTileUsage(frameState.tileUsage, tileSource, z, tileRange);
|
|
this.updateWantedTiles(frameState.wantedTiles, tileSource, z, tileRange);
|
|
|
|
goog.vec.Mat4.makeIdentity(this.matrix_);
|
|
goog.vec.Mat4.translate(this.matrix_,
|
|
(view2DState.center.x - framebufferExtent.minX) /
|
|
(framebufferExtent.maxX - framebufferExtent.minX),
|
|
(view2DState.center.y - framebufferExtent.minY) /
|
|
(framebufferExtent.maxY - framebufferExtent.minY),
|
|
0);
|
|
goog.vec.Mat4.rotateZ(this.matrix_, view2DState.rotation);
|
|
goog.vec.Mat4.scale(this.matrix_,
|
|
frameState.size.width * view2DState.resolution /
|
|
(framebufferExtent.maxX - framebufferExtent.minX),
|
|
frameState.size.height * view2DState.resolution /
|
|
(framebufferExtent.maxY - framebufferExtent.minY),
|
|
1);
|
|
goog.vec.Mat4.translate(this.matrix_,
|
|
-0.5,
|
|
-0.5,
|
|
0);
|
|
|
|
};
|