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<h1 class="file-heading">File: src/pixi/renderers/WebGLRenderer.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
PIXI._defaultFrame = new PIXI.Rectangle(0,0,1,1);
// an instance of the gl context..
// only one at the moment :/
PIXI.gl;
/**
* the WebGLRenderer is draws the stage and all its content onto a webGL enabled canvas. This renderer should be used for browsers support webGL. This Render works by automatically managing webGLBatchs. So no need for Sprite Batch's or Sprite Cloud's
* Dont forget to add the view to your DOM or you will not see anything :)
* @class WebGLRenderer
* @constructor
* @param width {Number} the width of the canvas view
* @default 0
* @param height {Number} the height of the canvas view
* @default 0
* @param view {Canvas} the canvas to use as a view, optional
* @param transparent {Boolean} the transparency of the render view, default false
* @default false
*
*/
PIXI.WebGLRenderer = function(width, height, view, transparent)
{
// do a catch.. only 1 webGL renderer..
//console.log(transparent)
this.transparent = !!transparent;
this.width = width || 800;
this.height = height || 600;
this.view = view || document.createElement( 'canvas' );
this.view.width = this.width;
this.view.height = this.height;
// deal with losing context..
var scope = this;
this.view.addEventListener('webglcontextlost', function(event) { scope.handleContextLost(event); }, false)
this.view.addEventListener('webglcontextrestored', function(event) { scope.handleContextRestored(event); }, false)
this.batchs = [];
try
{
PIXI.gl = this.gl = this.view.getContext("experimental-webgl", {
alpha: this.transparent,
antialias:false, // SPEED UP??
premultipliedAlpha:true
});
}
catch (e)
{
throw new Error(" This browser does not support webGL. Try using the canvas renderer" + this);
}
this.initShaders();
var gl = this.gl;
PIXI.WebGLRenderer.gl = gl;
this.batch = new PIXI.WebGLBatch(gl);
gl.disable(gl.DEPTH_TEST);
gl.disable(gl.CULL_FACE);
gl.enable(gl.BLEND);
gl.colorMask(true, true, true, this.transparent);
this.projectionMatrix = PIXI.mat4.create();
this.resize(this.width, this.height)
this.contextLost = false;
this.stageRenderGroup = new PIXI.WebGLRenderGroup(this.gl);
}
// constructor
PIXI.WebGLRenderer.constructor = PIXI.WebGLRenderer;
/**
* @private
*/
PIXI.WebGLRenderer.getBatch = function()
{
if(PIXI._batchs.length == 0)
{
return new PIXI.WebGLBatch(PIXI.WebGLRenderer.gl);
}
else
{
return PIXI._batchs.pop();
}
}
/**
* @private
*/
PIXI.WebGLRenderer.returnBatch = function(batch)
{
batch.clean();
PIXI._batchs.push(batch);
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.initShaders = function()
{
var gl = this.gl;
var fragmentShader = PIXI.CompileFragmentShader(gl, PIXI.shaderFragmentSrc);
var vertexShader = PIXI.CompileVertexShader(gl, PIXI.shaderVertexSrc);
this.shaderProgram = gl.createProgram();
var shaderProgram = this.shaderProgram;
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
alert("Could not initialise shaders");
}
gl.useProgram(shaderProgram);
shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
shaderProgram.textureCoordAttribute = gl.getAttribLocation(shaderProgram, "aTextureCoord");
gl.enableVertexAttribArray(shaderProgram.textureCoordAttribute);
shaderProgram.colorAttribute = gl.getAttribLocation(shaderProgram, "aColor");
gl.enableVertexAttribArray(shaderProgram.colorAttribute);
shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
shaderProgram.samplerUniform = gl.getUniformLocation(shaderProgram, "uSampler");
PIXI.shaderProgram = this.shaderProgram;
}
/**
* Renders the stage to its webGL view
* @method render
* @param stage {Stage} the PIXI.Stage element to be rendered
*/
PIXI.WebGLRenderer.prototype.render = function(stage)
{
if(this.contextLost)return;
// if rendering a new stage clear the batchs..
if(this.__stage !== stage)
{
// TODO make this work
if(this.__stage)this.checkVisibility(this.__stage, false)
this.__stage = stage;
this.stageRenderGroup.setRenderable(stage);
}
// update children if need be
// best to remove first!
for (var i=0; i < stage.__childrenRemoved.length; i++)
{
var group = stage.__childrenRemoved[i].__renderGroup
if(group)group.removeDisplayObject(stage.__childrenRemoved[i]);
}
// update any textures
for (var i=0; i < PIXI.texturesToUpdate.length; i++) this.updateTexture(PIXI.texturesToUpdate[i]);
for (var i=0; i < PIXI.texturesToDestroy.length; i++) this.destroyTexture(PIXI.texturesToDestroy[i]);
// empty out the arrays
stage.__childrenRemoved = [];
stage.__childrenAdded = [];
PIXI.texturesToUpdate = [];
PIXI.texturesToDestroy = [];
// recursivly loop through all items!
//this.checkVisibility(stage, true);
// update the scene graph
stage.updateTransform();
var gl = this.gl;
// -- Does this need to be set every frame? -- //
gl.colorMask(true, true, true, this.transparent);
gl.viewport(0, 0, this.width, this.height);
// set the correct matrix..
gl.uniformMatrix4fv(this.shaderProgram.mvMatrixUniform, false, this.projectionMatrix);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.clearColor(stage.backgroundColorSplit[0],stage.backgroundColorSplit[1],stage.backgroundColorSplit[2], this.transparent);
gl.clear(gl.COLOR_BUFFER_BIT);
// render all the batchs!
this.stageRenderGroup.backgroundColor = stage.backgroundColorSplit;
this.stageRenderGroup.render();
// interaction
// run interaction!
if(stage.interactive)
{
//need to add some events!
if(!stage._interactiveEventsAdded)
{
stage._interactiveEventsAdded = true;
stage.interactionManager.setTarget(this);
}
}
// after rendering lets confirm all frames that have been uodated..
if(PIXI.Texture.frameUpdates.length > 0)
{
for (var i=0; i < PIXI.Texture.frameUpdates.length; i++)
{
PIXI.Texture.frameUpdates[i].updateFrame = false;
};
PIXI.Texture.frameUpdates = [];
}
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.updateTexture = function(texture)
{
var gl = this.gl;
if(!texture._glTexture)
{
texture._glTexture = gl.createTexture();
}
if(texture.hasLoaded)
{
gl.bindTexture(gl.TEXTURE_2D, texture._glTexture);
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, texture.source);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
// reguler...
//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
//gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
if(!texture._powerOf2)
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
else
{
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
}
// gl.generateMipmap(gl.TEXTURE_2D);
gl.bindTexture(gl.TEXTURE_2D, null);
}
this.refreshBatchs = true;
}
PIXI.WebGLRenderer.prototype.destroyTexture = function(texture)
{
var gl = this.gl;
if(texture._glTexture)
{
texture._glTexture = gl.createTexture();
gl.deleteTexture(gl.TEXTURE_2D, texture._glTexture);
}
}
/**
* resizes the webGL view to the specified width and height
* @method resize
* @param width {Number} the new width of the webGL view
* @param height {Number} the new height of the webGL view
*/
PIXI.WebGLRenderer.prototype.resize = function(width, height)
{
this.width = width;
this.height = height;
this.view.width = width;
this.view.height = height;
this.gl.viewport(0, 0, this.width, this.height);
var projectionMatrix = this.projectionMatrix;
projectionMatrix[0] = 2/this.width;
projectionMatrix[5] = -2/this.height;
projectionMatrix[12] = -1;
projectionMatrix[13] = 1;
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.initTilingSprite = function(sprite)
{
var gl = this.gl;
// make the texture tilable..
sprite.verticies = new Float32Array([0, 0,
sprite.width, 0,
sprite.width, sprite.height,
0, sprite.height]);
sprite.uvs = new Float32Array([0, 0,
1, 0,
1, 1,
0, 1]);
sprite.colors = new Float32Array([1,1,1,1]);
sprite.indices = new Uint16Array([0, 1, 3,2])//, 2]);
sprite._vertexBuffer = gl.createBuffer();
sprite._indexBuffer = gl.createBuffer();
sprite._uvBuffer = gl.createBuffer();
sprite._colorBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, sprite._vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, sprite.verticies, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, sprite._uvBuffer);
gl.bufferData(gl.ARRAY_BUFFER, sprite.uvs, gl.DYNAMIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, sprite._colorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, sprite.colors, gl.STATIC_DRAW);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, sprite._indexBuffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, sprite.indices, gl.STATIC_DRAW);
// return ( (x > 0) && ((x & (x - 1)) == 0) );
if(sprite.texture.baseTexture._glTexture)
{
gl.bindTexture(gl.TEXTURE_2D, sprite.texture.baseTexture._glTexture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
sprite.texture.baseTexture._powerOf2 = true;
}
else
{
sprite.texture.baseTexture._powerOf2 = true;
}
/*
var context = this.context;
if(!sprite.__tilePattern) sprite.__tilePattern = context.createPattern(sprite.texture.baseTexture.source, "repeat");
context.beginPath();
var tilePosition = sprite.tilePosition;
var tileScale = sprite.tileScale;
// offset
context.scale(tileScale.x,tileScale.y);
context.translate(tilePosition.x, tilePosition.y);
context.fillStyle = sprite.__tilePattern;
context.fillRect(-tilePosition.x,-tilePosition.y,sprite.width / tileScale.x, sprite.height / tileScale.y);
context.translate(-tilePosition.x, -tilePosition.y);
context.scale(1/tileScale.x, 1/tileScale.y);
*/
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.renderTilingSprite = function(sprite)
{
var gl = this.gl;
var shaderProgram = this.shaderProgram;
var tilePosition = sprite.tilePosition;
var tileScale = sprite.tileScale;
var offsetX = tilePosition.x/sprite.texture.baseTexture.width;
var offsetY = tilePosition.y/sprite.texture.baseTexture.height;
var scaleX = (sprite.width / sprite.texture.baseTexture.width) / tileScale.x;
var scaleY = (sprite.height / sprite.texture.baseTexture.height) / tileScale.y;
sprite.uvs[0] = 0 - offsetX;
sprite.uvs[1] = 0 - offsetY;
sprite.uvs[2] = (1 * scaleX) -offsetX;
sprite.uvs[3] = 0 - offsetY;
sprite.uvs[4] = (1 *scaleX) - offsetX;
sprite.uvs[5] = (1 *scaleY) - offsetY;
sprite.uvs[6] = 0 - offsetX;
sprite.uvs[7] = (1 *scaleY) - offsetY;
gl.bindBuffer(gl.ARRAY_BUFFER, sprite._uvBuffer);
gl.bufferSubData(gl.ARRAY_BUFFER, 0, sprite.uvs)
this.renderStrip(sprite);
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.initStrip = function(strip)
{
// build the strip!
var gl = this.gl;
var shaderProgram = this.shaderProgram;
strip._vertexBuffer = gl.createBuffer();
strip._indexBuffer = gl.createBuffer();
strip._uvBuffer = gl.createBuffer();
strip._colorBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, strip._vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.verticies, gl.DYNAMIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, strip._uvBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.uvs, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, strip._colorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.colors, gl.STATIC_DRAW);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, strip._indexBuffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, strip.indices, gl.STATIC_DRAW);
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.renderStrip = function(strip)
{
var gl = this.gl;
var shaderProgram = this.shaderProgram;
// mat
var mat4Real = PIXI.mat3.toMat4(strip.worldTransform);
PIXI.mat4.transpose(mat4Real);
PIXI.mat4.multiply(this.projectionMatrix, mat4Real, mat4Real )
gl.uniformMatrix4fv(this.shaderProgram.mvMatrixUniform, false, mat4Real);
if(strip.blendMode == PIXI.blendModes.NORMAL)
{
gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
}
else
{
gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_COLOR);
}
if(!strip.dirty)
{
gl.bindBuffer(gl.ARRAY_BUFFER, strip._vertexBuffer);
gl.bufferSubData(gl.ARRAY_BUFFER, 0, strip.verticies)
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, 2, gl.FLOAT, false, 0, 0);
// update the uvs
gl.bindBuffer(gl.ARRAY_BUFFER, strip._uvBuffer);
gl.vertexAttribPointer(shaderProgram.textureCoordAttribute, 2, gl.FLOAT, false, 0, 0);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, strip.texture.baseTexture._glTexture);
gl.bindBuffer(gl.ARRAY_BUFFER, strip._colorBuffer);
gl.vertexAttribPointer(shaderProgram.colorAttribute, 1, gl.FLOAT, false, 0, 0);
// dont need to upload!
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, strip._indexBuffer);
}
else
{
strip.dirty = false;
gl.bindBuffer(gl.ARRAY_BUFFER, strip._vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.verticies, gl.STATIC_DRAW)
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, 2, gl.FLOAT, false, 0, 0);
// update the uvs
gl.bindBuffer(gl.ARRAY_BUFFER, strip._uvBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.uvs, gl.STATIC_DRAW)
gl.vertexAttribPointer(shaderProgram.textureCoordAttribute, 2, gl.FLOAT, false, 0, 0);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, strip.texture.baseTexture._glTexture);
gl.bindBuffer(gl.ARRAY_BUFFER, strip._colorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, strip.colors, gl.STATIC_DRAW)
gl.vertexAttribPointer(shaderProgram.colorAttribute, 1, gl.FLOAT, false, 0, 0);
// dont need to upload!
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, strip._indexBuffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, strip.indices, gl.STATIC_DRAW);
}
//console.log(gl.TRIANGLE_STRIP)
gl.drawElements(gl.TRIANGLE_STRIP, strip.indices.length, gl.UNSIGNED_SHORT, 0);
gl.uniformMatrix4fv(this.shaderProgram.mvMatrixUniform, false, this.projectionMatrix);
// console.log("!!!")
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.handleContextLost = function(event)
{
event.preventDefault();
this.contextLost = true;
}
/**
* @private
*/
PIXI.WebGLRenderer.prototype.handleContextRestored = function(event)
{
this.gl = this.view.getContext("experimental-webgl", {
alpha: true
});
this.initShaders();
for (var i=0; i < PIXI.TextureCache.length; i++)
{
this.updateTexture(PIXI.TextureCache[i]);
};
for (var i=0; i < this.batchs.length; i++)
{
this.batchs[i].restoreLostContext(this.gl)//
this.batchs[i].dirty = true;
};
PIXI._restoreBatchs(this.gl);
this.contextLost = false;
}
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