521 lines
13 KiB
JavaScript
521 lines
13 KiB
JavaScript
// FIXME clear tileTextureCache
|
|
// FIXME defer texture loads until after redraw when animating
|
|
// FIXME generational tile texture garbage collector newFrame/get
|
|
// FIXME defer cleanup until post-render
|
|
// FIXME check against gl.getParameter(webgl.MAX_TEXTURE_SIZE)
|
|
|
|
goog.provide('ol.webgl.Map');
|
|
goog.provide('ol.webgl.map.shader');
|
|
|
|
goog.require('goog.dispose');
|
|
goog.require('goog.dom');
|
|
goog.require('goog.dom.TagName');
|
|
goog.require('goog.events');
|
|
goog.require('goog.events.Event');
|
|
goog.require('goog.events.EventType');
|
|
goog.require('goog.style');
|
|
goog.require('goog.webgl');
|
|
goog.require('ol.Layer');
|
|
goog.require('ol.Map');
|
|
goog.require('ol.TileLayer');
|
|
goog.require('ol.webgl.TileLayerRenderer');
|
|
goog.require('ol.webgl.WebGLContextEventType');
|
|
goog.require('ol.webgl.shader.Fragment');
|
|
goog.require('ol.webgl.shader.Vertex');
|
|
|
|
|
|
/**
|
|
* @define {boolean} Enable WebGL debugging.
|
|
*/
|
|
ol.DEBUG_WEBGL = false;
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.webgl.shader.Fragment}
|
|
*/
|
|
ol.webgl.map.shader.Fragment = function() {
|
|
goog.base(this, [
|
|
'precision mediump float;',
|
|
'',
|
|
'uniform float uOpacity;',
|
|
'uniform sampler2D uTexture;',
|
|
'',
|
|
'varying vec2 vTexCoord;',
|
|
'',
|
|
'void main(void) {',
|
|
' gl_FragColor = vec4(texture2D(uTexture, vTexCoord).rgb, uOpacity);',
|
|
'}'
|
|
].join('\n'));
|
|
};
|
|
goog.inherits(ol.webgl.map.shader.Fragment, ol.webgl.shader.Fragment);
|
|
goog.addSingletonGetter(ol.webgl.map.shader.Fragment);
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.webgl.shader.Vertex}
|
|
*/
|
|
ol.webgl.map.shader.Vertex = function() {
|
|
goog.base(this, [
|
|
'attribute vec2 aPosition;',
|
|
'attribute vec2 aTexCoord;',
|
|
'',
|
|
'varying vec2 vTexCoord;',
|
|
'',
|
|
'uniform mat4 uMatrix;',
|
|
'',
|
|
'void main(void) {',
|
|
' gl_Position = uMatrix * vec4(aPosition, 0., 1.);',
|
|
' vTexCoord = aTexCoord;',
|
|
'}'
|
|
].join('\n'));
|
|
};
|
|
goog.inherits(ol.webgl.map.shader.Vertex, ol.webgl.shader.Vertex);
|
|
goog.addSingletonGetter(ol.webgl.map.shader.Vertex);
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.Map}
|
|
* @param {!HTMLDivElement} target Target.
|
|
* @param {Object.<string, *>=} opt_values Values.
|
|
*/
|
|
ol.webgl.Map = function(target, opt_values) {
|
|
|
|
goog.base(this, target);
|
|
|
|
/**
|
|
* @private
|
|
* @type {Element}
|
|
*/
|
|
this.canvas_ = goog.dom.createElement(goog.dom.TagName.CANVAS);
|
|
this.canvas_.height = target.clientHeight;
|
|
this.canvas_.width = target.clientWidth;
|
|
this.canvas_.style.overflow = 'hidden';
|
|
target.appendChild(this.canvas_);
|
|
|
|
/**
|
|
* @private
|
|
* @type {WebGLRenderingContext}
|
|
*/
|
|
this.gl_ = this.canvas_.getContext('experimental-webgl', {
|
|
alpha: false,
|
|
antialias: true,
|
|
depth: false,
|
|
preserveDrawingBuffer: false,
|
|
stencil: false
|
|
});
|
|
goog.asserts.assert(!goog.isNull(this.gl_));
|
|
|
|
if (ol.DEBUG_WEBGL) {
|
|
this.gl_ = WebGLDebugUtils.makeDebugContext(this.gl_);
|
|
}
|
|
|
|
goog.events.listen(this.canvas_, ol.webgl.WebGLContextEventType.LOST,
|
|
this.handleWebGLContextLost, false, this);
|
|
goog.events.listen(this.canvas_, ol.webgl.WebGLContextEventType.RESTORED,
|
|
this.handleWebGLContextRestored, false, this);
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.Color}
|
|
*/
|
|
this.clearColor_ = new ol.Color(1, 1, 1, 1);
|
|
|
|
/**
|
|
* @private
|
|
* @type {{aPosition: number,
|
|
* aTexCoord: number,
|
|
* uMatrix: WebGLUniformLocation,
|
|
* uOpacity: WebGLUniformLocation,
|
|
* uTexture: WebGLUniformLocation}|null}
|
|
*/
|
|
this.locations_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {WebGLBuffer}
|
|
*/
|
|
this.arrayBuffer_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {Object.<number, WebGLShader>}
|
|
*/
|
|
this.shaderCache_ = {};
|
|
|
|
/**
|
|
* @private
|
|
* @type {Object.<string, WebGLProgram>}
|
|
*/
|
|
this.programCache_ = {};
|
|
|
|
/**
|
|
* @private
|
|
* @type {Object.<string, WebGLTexture>}
|
|
*/
|
|
this.tileTextureCache_ = {};
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.webgl.shader.Fragment}
|
|
*/
|
|
this.fragmentShader_ = ol.webgl.map.shader.Fragment.getInstance();
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.webgl.shader.Vertex}
|
|
*/
|
|
this.vertexShader_ = ol.webgl.map.shader.Vertex.getInstance();
|
|
|
|
/**
|
|
* @private
|
|
* @type {Object.<number, null|number>}
|
|
*/
|
|
this.layerRendererChangeListenKeys_ = {};
|
|
|
|
if (goog.isDef(opt_values)) {
|
|
this.setValues(opt_values);
|
|
}
|
|
|
|
this.handleViewportResize();
|
|
this.handleWebGLContextRestored();
|
|
|
|
};
|
|
goog.inherits(ol.webgl.Map, ol.Map);
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.createLayerRenderer = function(layer) {
|
|
var gl = this.getGL();
|
|
if (layer instanceof ol.TileLayer) {
|
|
return new ol.webgl.TileLayerRenderer(this, layer);
|
|
} else {
|
|
goog.asserts.assert(false);
|
|
return null;
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.disposeInternal = function() {
|
|
var gl = this.getGL();
|
|
if (!gl.isContextLost()) {
|
|
goog.object.forEach(this.programCache_, function(program) {
|
|
gl.deleteProgram(program);
|
|
});
|
|
goog.object.forEach(this.shaderCache_, function(shader) {
|
|
gl.deleteShader(shader);
|
|
});
|
|
goog.object.forEach(this.tileTextureCache_, function(texture) {
|
|
gl.deleteTexture(texture);
|
|
});
|
|
}
|
|
goog.base(this, 'disposeInternal');
|
|
};
|
|
|
|
|
|
/**
|
|
* @return {WebGLRenderingContext} GL.
|
|
*/
|
|
ol.webgl.Map.prototype.getGL = function() {
|
|
return this.gl_;
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {ol.webgl.shader.Fragment} fragmentShaderObject Fragment shader.
|
|
* @param {ol.webgl.shader.Vertex} vertexShaderObject Vertex shader.
|
|
* @return {WebGLProgram} Program.
|
|
*/
|
|
ol.webgl.Map.prototype.getProgram = function(
|
|
fragmentShaderObject, vertexShaderObject) {
|
|
var key =
|
|
goog.getUid(fragmentShaderObject) + '/' + goog.getUid(vertexShaderObject);
|
|
if (key in this.programCache_) {
|
|
return this.programCache_[key];
|
|
} else {
|
|
var gl = this.getGL();
|
|
var program = gl.createProgram();
|
|
gl.attachShader(program, this.getShader(fragmentShaderObject));
|
|
gl.attachShader(program, this.getShader(vertexShaderObject));
|
|
gl.linkProgram(program);
|
|
if (!gl.getProgramParameter(program, goog.webgl.LINK_STATUS) &&
|
|
!gl.isContextLost()) {
|
|
window.console.log(gl.getProgramInfoLog(program));
|
|
goog.asserts.assert(
|
|
gl.getProgramParameter(program, goog.webgl.LINK_STATUS));
|
|
}
|
|
this.programCache_[key] = program;
|
|
return program;
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {ol.webgl.Shader} shaderObject Shader object.
|
|
* @return {WebGLShader} Shader.
|
|
*/
|
|
ol.webgl.Map.prototype.getShader = function(shaderObject) {
|
|
var key = goog.getUid(shaderObject);
|
|
if (key in this.shaderCache_) {
|
|
return this.shaderCache_[key];
|
|
} else {
|
|
var gl = this.getGL();
|
|
var shader = gl.createShader(shaderObject.getType());
|
|
gl.shaderSource(shader, shaderObject.getSource());
|
|
gl.compileShader(shader);
|
|
if (!gl.getShaderParameter(shader, goog.webgl.COMPILE_STATUS) &&
|
|
!gl.isContextLost()) {
|
|
window.console.log(gl.getShaderInfoLog(shader));
|
|
goog.asserts.assert(
|
|
gl.getShaderParameter(shader, goog.webgl.COMPILE_STATUS));
|
|
}
|
|
this.shaderCache_[key] = shader;
|
|
return shader;
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {ol.Tile} tile Tile.
|
|
* @return {WebGLTexture} Texture.
|
|
*/
|
|
ol.webgl.Map.prototype.getTileTexture = function(tile) {
|
|
var image = tile.getImage();
|
|
if (image.src in this.tileTextureCache_) {
|
|
return this.tileTextureCache_[image.src];
|
|
} else {
|
|
var gl = this.getGL();
|
|
var texture = gl.createTexture();
|
|
gl.bindTexture(goog.webgl.TEXTURE_2D, texture);
|
|
gl.texImage2D(goog.webgl.TEXTURE_2D, 0, goog.webgl.RGBA, goog.webgl.RGBA,
|
|
goog.webgl.UNSIGNED_BYTE, image);
|
|
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.CLAMP_TO_EDGE);
|
|
gl.texParameteri(goog.webgl.TEXTURE_2D, goog.webgl.TEXTURE_WRAP_T,
|
|
goog.webgl.CLAMP_TO_EDGE);
|
|
this.tileTextureCache_[image.src] = texture;
|
|
return texture;
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleBackgroundColorChanged = function() {
|
|
var backgroundColor = this.getBackgroundColor();
|
|
this.clearColor_ = new ol.Color(
|
|
backgroundColor.r / 255,
|
|
backgroundColor.g / 255,
|
|
backgroundColor.b / 255,
|
|
backgroundColor.a / 255);
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleCenterChanged = function() {
|
|
goog.base(this, 'handleCenterChanged');
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleLayerAdd = function(layer) {
|
|
goog.base(this, 'handleLayerAdd', layer);
|
|
if (layer.getVisible()) {
|
|
this.redraw();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {goog.events.Event} event Event.
|
|
* @protected
|
|
*/
|
|
ol.webgl.Map.prototype.handleLayerRendererChange = function(event) {
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleLayerRemove = function(layer) {
|
|
goog.base(this, 'handleLayerRemove', layer);
|
|
if (layer.getVisible()) {
|
|
this.redraw();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleResolutionChanged = function() {
|
|
goog.base(this, 'handleResolutionChanged');
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.handleSizeChanged = function() {
|
|
goog.base(this, 'handleSizeChanged');
|
|
var size = this.getSize();
|
|
if (!goog.isDef(size)) {
|
|
return;
|
|
}
|
|
this.canvas_.width = size.width;
|
|
this.canvas_.height = size.height;
|
|
var gl = this.gl_;
|
|
if (!goog.isNull(gl)) {
|
|
gl.viewport(0, 0, size.width, size.height);
|
|
this.redraw();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {goog.events.Event} event Event.
|
|
* @protected
|
|
*/
|
|
ol.webgl.Map.prototype.handleWebGLContextLost = function(event) {
|
|
event.preventDefault();
|
|
this.locations_ = null;
|
|
this.arrayBuffer_ = null;
|
|
this.shaderCache_ = {};
|
|
this.programCache_ = {};
|
|
this.tileTextureCache_ = {};
|
|
goog.object.forEach(this.layerRenderers, function(layerRenderer) {
|
|
layerRenderer.handleWebGLContextLost();
|
|
});
|
|
};
|
|
|
|
|
|
/**
|
|
* @protected
|
|
*/
|
|
ol.webgl.Map.prototype.handleWebGLContextRestored = function() {
|
|
var gl = this.gl_;
|
|
gl.disable(goog.webgl.CULL_FACE);
|
|
gl.disable(goog.webgl.SCISSOR_TEST);
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.redrawInternal = function() {
|
|
|
|
var center = this.getCenter();
|
|
var resolution = this.getResolution();
|
|
if (!goog.isDef(center) || !goog.isDef(resolution)) {
|
|
return false;
|
|
}
|
|
|
|
var animate = goog.base(this, 'redrawInternal');
|
|
|
|
var gl = this.getGL();
|
|
|
|
gl.bindFramebuffer(goog.webgl.FRAMEBUFFER, null);
|
|
|
|
gl.clearColor(this.clearColor_.r, this.clearColor_.g, this.clearColor_.b,
|
|
this.clearColor_.a);
|
|
gl.clear(goog.webgl.COLOR_BUFFER_BIT);
|
|
gl.enable(goog.webgl.BLEND);
|
|
gl.blendFunc(goog.webgl.SRC_ALPHA, goog.webgl.ONE_MINUS_SRC_ALPHA);
|
|
|
|
var program = this.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'),
|
|
uMatrix: gl.getUniformLocation(program, 'uMatrix'),
|
|
uOpacity: gl.getUniformLocation(program, 'uOpacity'),
|
|
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, 0,
|
|
1, 0, 1, 0,
|
|
0, 1, 0, 1,
|
|
1, 1, 1, 1
|
|
]), 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);
|
|
|
|
this.forEachVisibleLayer(function(layer, layerRenderer) {
|
|
gl.uniformMatrix4fv(
|
|
this.locations_.uMatrix, false, layerRenderer.getMatrix());
|
|
gl.uniform1f(this.locations_.uOpacity, layer.getOpacity());
|
|
gl.bindTexture(goog.webgl.TEXTURE_2D, layerRenderer.getTexture());
|
|
gl.activeTexture(goog.webgl.TEXTURE0);
|
|
gl.drawArrays(goog.webgl.TRIANGLE_STRIP, 0, 4);
|
|
}, this);
|
|
|
|
return animate;
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.removeLayerRenderer = function(layer) {
|
|
var layerRenderer = goog.base(this, 'removeLayerRenderer', layer);
|
|
if (!goog.isNull(layerRenderer)) {
|
|
var key = goog.getUid(layer);
|
|
goog.events.unlistenByKey(this.layerRendererChangeListenKeys_[key]);
|
|
delete this.layerRendererChangeListenKeys_[key];
|
|
}
|
|
return layerRenderer;
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.webgl.Map.prototype.setLayerRenderer = function(layer, layerRenderer) {
|
|
goog.base(this, 'setLayerRenderer', layer, layerRenderer);
|
|
var key = goog.getUid(layer);
|
|
this.layerRendererChangeListenKeys_[key] = goog.events.listen(layerRenderer,
|
|
goog.events.EventType.CHANGE, this.handleLayerRendererChange, false,
|
|
this);
|
|
};
|