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<h1 class="file-heading">File: src/pixi/renderers/webgl/utils/WebGLSpriteBatch.js</h1>
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<pre class="code prettyprint linenums">
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/**
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* @author Mat Groves
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*
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* Big thanks to the very clever Matt DesLauriers <mattdesl> https://github.com/mattdesl/
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* for creating the original pixi version!
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*
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* Heavily inspired by LibGDX's WebGLSpriteBatch:
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* https://github.com/libgdx/libgdx/blob/master/gdx/src/com/badlogic/gdx/graphics/g2d/WebGLSpriteBatch.java
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*/
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PIXI.WebGLSpriteBatch = function(gl)
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{
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this.size = 2000;
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this.vertSize = 6;
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//the total number of floats in our batch
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var numVerts = this.size * 4 * this.vertSize;
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//the total number of indices in our batch
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var numIndices = this.size * 6;
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//vertex data
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this.vertices = new Float32Array(numVerts);
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//index data
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this.indices = new Uint16Array(numIndices);
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this.lastIndexCount = 0;
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for (var i=0, j=0; i < numIndices; i += 6, j += 4)
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{
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this.indices[i + 0] = j + 0;
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this.indices[i + 1] = j + 1;
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this.indices[i + 2] = j + 2;
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this.indices[i + 3] = j + 0;
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this.indices[i + 4] = j + 2;
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this.indices[i + 5] = j + 3;
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}
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this.drawing = false;
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this.currentBatchSize = 0;
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this.currentBaseTexture = null;
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this.setContext(gl);
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};
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PIXI.WebGLSpriteBatch.prototype.setContext = function(gl)
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{
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this.gl = gl;
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// create a couple of buffers
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this.vertexBuffer = gl.createBuffer();
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this.indexBuffer = gl.createBuffer();
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// 65535 is max index, so 65535 / 6 = 10922.
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//upload the index data
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gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indexBuffer);
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gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, this.indices, gl.STATIC_DRAW);
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gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
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gl.bufferData(gl.ARRAY_BUFFER, this.vertices, gl.DYNAMIC_DRAW);
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this.currentBlendMode = 99999;
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};
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PIXI.WebGLSpriteBatch.prototype.begin = function(renderSession)
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{
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this.renderSession = renderSession;
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this.shader = this.renderSession.shaderManager.defaultShader;
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this.start();
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};
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PIXI.WebGLSpriteBatch.prototype.end = function()
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{
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this.flush();
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};
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PIXI.WebGLSpriteBatch.prototype.render = function(sprite)
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{
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// check texture..
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if(sprite.texture.baseTexture !== this.currentBaseTexture || this.currentBatchSize >= this.size)
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{
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this.flush();
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this.currentBaseTexture = sprite.texture.baseTexture;
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}
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// check blend mode
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if(sprite.blendMode !== this.currentBlendMode)
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{
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this.setBlendMode(sprite.blendMode);
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}
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// get the uvs for the texture
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var uvs = sprite._uvs || sprite.texture._uvs;
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// if the uvs have not updated then no point rendering just yet!
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if(!uvs)return;
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// get the sprites current alpha
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var alpha = sprite.worldAlpha;
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var tint = sprite.tint;
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var verticies = this.vertices;
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var width = sprite.texture.frame.width;
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var height = sprite.texture.frame.height;
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// TODO trim??
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var aX = sprite.anchor.x;
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var aY = sprite.anchor.y;
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var w0, w1, h0, h1;
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if (sprite.texture.trimmed)
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{
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// if the sprite is trimmed then we need to add the extra space before transforming the sprite coords..
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var trim = sprite.texture.trim;
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w1 = trim.x - aX * trim.realWidth;
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w0 = w1 + width;
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h1 = trim.y - aY * trim.realHeight;
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h0 = h1 + height;
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}
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else
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{
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w0 = (width ) * (1-aX);
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w1 = (width ) * -aX;
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h0 = height * (1-aY);
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h1 = height * -aY;
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}
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var index = this.currentBatchSize * 4 * this.vertSize;
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var worldTransform = sprite.worldTransform;
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var a = worldTransform[0];
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var b = worldTransform[3];
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var c = worldTransform[1];
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var d = worldTransform[4];
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var tx = worldTransform[2];
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var ty = worldTransform[5];
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// xy
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verticies[index++] = a * w1 + c * h1 + tx;
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verticies[index++] = d * h1 + b * w1 + ty;
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// uv
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verticies[index++] = uvs[0];
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verticies[index++] = uvs[1];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w0 + c * h1 + tx;
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verticies[index++] = d * h1 + b * w0 + ty;
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// uv
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verticies[index++] = uvs[2];
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verticies[index++] = uvs[3];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w0 + c * h0 + tx;
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verticies[index++] = d * h0 + b * w0 + ty;
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// uv
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verticies[index++] = uvs[4];
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verticies[index++] = uvs[5];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w1 + c * h0 + tx;
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verticies[index++] = d * h0 + b * w1 + ty;
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// uv
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verticies[index++] = uvs[6];
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verticies[index++] = uvs[7];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// increment the batchs
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this.currentBatchSize++;
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};
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PIXI.WebGLSpriteBatch.prototype.renderTilingSprite = function(tilingSprite)
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{
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var texture = tilingSprite.texture;
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if(texture.baseTexture !== this.currentBaseTexture || this.currentBatchSize >= this.size)
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{
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this.flush();
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this.currentBaseTexture = texture.baseTexture;
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}
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// check blend mode
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if(tilingSprite.blendMode !== this.currentBlendMode)
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{
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this.setBlendMode(tilingSprite.blendMode);
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}
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// set the textures uvs temporarily
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// TODO create a seperate texture so that we can tile part of a texture
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if(!tilingSprite._uvs)tilingSprite._uvs = new Float32Array(8);
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var uvs = tilingSprite._uvs;
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var offsetX = tilingSprite.tilePosition.x/texture.baseTexture.width;
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var offsetY = tilingSprite.tilePosition.y/texture.baseTexture.height;
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var scaleX = (tilingSprite.width / texture.baseTexture.width) / tilingSprite.tileScale.x;
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var scaleY = (tilingSprite.height / texture.baseTexture.height) / tilingSprite.tileScale.y;
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uvs[0] = 0 - offsetX;
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uvs[1] = 0 - offsetY;
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uvs[2] = (1 * scaleX) - offsetX;
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uvs[3] = 0 - offsetY;
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uvs[4] = (1 * scaleX) - offsetX;
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uvs[5] = (1 * scaleY) - offsetY;
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uvs[6] = 0 - offsetX;
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uvs[7] = (1 *scaleY) - offsetY;
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// get the tilingSprites current alpha
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var alpha = tilingSprite.worldAlpha;
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var tint = tilingSprite.tint;
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var verticies = this.vertices;
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var width = tilingSprite.width;
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var height = tilingSprite.height;
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// TODO trim??
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var aX = tilingSprite.anchor.x; // - tilingSprite.texture.trim.x
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var aY = tilingSprite.anchor.y; //- tilingSprite.texture.trim.y
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var w0 = width * (1-aX);
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var w1 = width * -aX;
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var h0 = height * (1-aY);
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var h1 = height * -aY;
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var index = this.currentBatchSize * 4 * this.vertSize;
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var worldTransform = tilingSprite.worldTransform;
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var a = worldTransform[0];
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var b = worldTransform[3];
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var c = worldTransform[1];
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var d = worldTransform[4];
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var tx = worldTransform[2];
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var ty = worldTransform[5];
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// xy
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verticies[index++] = a * w1 + c * h1 + tx;
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verticies[index++] = d * h1 + b * w1 + ty;
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// uv
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verticies[index++] = uvs[0];
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verticies[index++] = uvs[1];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w0 + c * h1 + tx;
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verticies[index++] = d * h1 + b * w0 + ty;
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// uv
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verticies[index++] = uvs[2];
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verticies[index++] = uvs[3];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w0 + c * h0 + tx;
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verticies[index++] = d * h0 + b * w0 + ty;
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// uv
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verticies[index++] = uvs[4];
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verticies[index++] = uvs[5];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// xy
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verticies[index++] = a * w1 + c * h0 + tx;
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verticies[index++] = d * h0 + b * w1 + ty;
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// uv
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verticies[index++] = uvs[6];
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verticies[index++] = uvs[7];
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// color
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verticies[index++] = alpha;
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verticies[index++] = tint;
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// increment the batchs
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this.currentBatchSize++;
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};
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PIXI.WebGLSpriteBatch.prototype.flush = function()
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{
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// If the batch is length 0 then return as there is nothing to draw
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if (this.currentBatchSize===0)return;
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var gl = this.gl;
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// bind the current texture
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gl.bindTexture(gl.TEXTURE_2D, this.currentBaseTexture._glTextures[gl.id] || PIXI.createWebGLTexture(this.currentBaseTexture, gl));
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// upload the verts to the buffer
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var view = this.vertices.subarray(0, this.currentBatchSize * 4 * this.vertSize);
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gl.bufferSubData(gl.ARRAY_BUFFER, 0, view);
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// now draw those suckas!
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gl.drawElements(gl.TRIANGLES, this.currentBatchSize * 6, gl.UNSIGNED_SHORT, 0);
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// then reset the batch!
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this.currentBatchSize = 0;
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// increment the draw count
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this.renderSession.drawCount++;
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};
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PIXI.WebGLSpriteBatch.prototype.stop = function()
|
|
{
|
|
this.flush();
|
|
};
|
|
|
|
PIXI.WebGLSpriteBatch.prototype.start = function()
|
|
{
|
|
var gl = this.gl;
|
|
|
|
// bind the main texture
|
|
gl.activeTexture(gl.TEXTURE0);
|
|
|
|
// bind the buffers
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
|
|
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indexBuffer);
|
|
|
|
// set the projection
|
|
var projection = this.renderSession.projection;
|
|
gl.uniform2f(this.shader.projectionVector, projection.x, projection.y);
|
|
|
|
// set the pointers
|
|
var stride = this.vertSize * 4;
|
|
gl.vertexAttribPointer(this.shader.aVertexPosition, 2, gl.FLOAT, false, stride, 0);
|
|
gl.vertexAttribPointer(this.shader.aTextureCoord, 2, gl.FLOAT, false, stride, 2 * 4);
|
|
gl.vertexAttribPointer(this.shader.colorAttribute, 2, gl.FLOAT, false, stride, 4 * 4);
|
|
|
|
// set the blend mode..
|
|
if(this.currentBlendMode !== PIXI.blendModes.NORMAL)
|
|
{
|
|
this.setBlendMode(PIXI.blendModes.NORMAL);
|
|
}
|
|
};
|
|
|
|
PIXI.WebGLSpriteBatch.prototype.setBlendMode = function(blendMode)
|
|
{
|
|
this.flush();
|
|
|
|
this.currentBlendMode = blendMode;
|
|
|
|
var blendModeWebGL = PIXI.blendModesWebGL[this.currentBlendMode];
|
|
this.gl.blendFunc(blendModeWebGL[0], blendModeWebGL[1]);
|
|
};
|
|
|
|
|
|
|
|
</pre>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<script src="../assets/vendor/prettify/prettify-min.js"></script>
|
|
<script>prettyPrint();</script>
|
|
<script src="../assets/js/yui-prettify.js"></script>
|
|
<script src="../assets/../api.js"></script>
|
|
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|
|
<script src="../assets/js/api-list.js"></script>
|
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|
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