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<h1 class="page-title">Source: d:/wamp/www/phaser/src/pixi/renderers/webgl/utils/WebGLSpriteBatch.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Mat Groves
*
* Big thanks to the very clever Matt DesLauriers &lt;mattdesl> https://github.com/mattdesl/
* for creating the original pixi version!
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* Also a thanks to https://github.com/bchevalier for tweaking the tint and alpha so that they now share 4 bytes on the vertex buffer
*
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* Heavily inspired by LibGDX's WebGLSpriteBatch:
* https://github.com/libgdx/libgdx/blob/master/gdx/src/com/badlogic/gdx/graphics/g2d/WebGLSpriteBatch.java
*/
/**
*
* @class WebGLSpriteBatch
* @private
* @constructor
*/
PIXI.WebGLSpriteBatch = function()
{
/**
* @property vertSize
* @type Number
*/
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this.vertSize = 5;
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/**
* The number of images in the SpriteBatch before it flushes
* @property size
* @type Number
*/
this.size = 2000;//Math.pow(2, 16) / this.vertSize;
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//the total number of bytes in our batch
var numVerts = this.size * 4 * 4 * this.vertSize;
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//the total number of indices in our batch
var numIndices = this.size * 6;
/**
* Holds the vertices
*
* @property vertices
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* @type ArrayBuffer
*/
this.vertices = new PIXI.ArrayBuffer(numVerts);
/**
* View on the vertices as a Float32Array
*
* @property positions
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* @type Float32Array
*/
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this.positions = new PIXI.Float32Array(this.vertices);
/**
* View on the vertices as a Uint32Array
*
* @property colors
* @type Uint32Array
*/
this.colors = new PIXI.Uint32Array(this.vertices);
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/**
* Holds the indices
*
* @property indices
* @type Uint16Array
*/
this.indices = new PIXI.Uint16Array(numIndices);
/**
* @property lastIndexCount
* @type Number
*/
this.lastIndexCount = 0;
for (var i=0, j=0; i &lt; numIndices; i += 6, j += 4)
{
this.indices[i + 0] = j + 0;
this.indices[i + 1] = j + 1;
this.indices[i + 2] = j + 2;
this.indices[i + 3] = j + 0;
this.indices[i + 4] = j + 2;
this.indices[i + 5] = j + 3;
}
/**
* @property drawing
* @type Boolean
*/
this.drawing = false;
/**
* @property currentBatchSize
* @type Number
*/
this.currentBatchSize = 0;
/**
* @property currentBaseTexture
* @type BaseTexture
*/
this.currentBaseTexture = null;
/**
* @property dirty
* @type Boolean
*/
this.dirty = true;
/**
* @property textures
* @type Array
*/
this.textures = [];
/**
* @property blendModes
* @type Array
*/
this.blendModes = [];
/**
* @property shaders
* @type Array
*/
this.shaders = [];
/**
* @property sprites
* @type Array
*/
this.sprites = [];
/**
* @property defaultShader
* @type AbstractFilter
*/
this.defaultShader = new PIXI.AbstractFilter([
'precision lowp float;',
'varying vec2 vTextureCoord;',
'varying vec4 vColor;',
'uniform sampler2D uSampler;',
'void main(void) {',
' gl_FragColor = texture2D(uSampler, vTextureCoord) * vColor ;',
'}'
]);
};
/**
* @method setContext
* @param gl {WebGLContext} the current WebGL drawing context
*/
PIXI.WebGLSpriteBatch.prototype.setContext = function(gl)
{
this.gl = gl;
// create a couple of buffers
this.vertexBuffer = gl.createBuffer();
this.indexBuffer = gl.createBuffer();
// 65535 is max index, so 65535 / 6 = 10922.
//upload the index data
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.indexBuffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, this.indices, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, this.vertices, gl.DYNAMIC_DRAW);
this.currentBlendMode = 99999;
var shader = new PIXI.PixiShader(gl);
shader.fragmentSrc = this.defaultShader.fragmentSrc;
shader.uniforms = {};
shader.init();
this.defaultShader.shaders[gl.id] = shader;
};
/**
* @method begin
* @param renderSession {Object} The RenderSession object
*/
PIXI.WebGLSpriteBatch.prototype.begin = function(renderSession)
{
this.renderSession = renderSession;
this.shader = this.renderSession.shaderManager.defaultShader;
this.start();
};
/**
* @method end
*/
PIXI.WebGLSpriteBatch.prototype.end = function()
{
this.flush();
};
/**
* @method render
* @param sprite {Sprite} the sprite to render when using this spritebatch
*/
PIXI.WebGLSpriteBatch.prototype.render = function(sprite)
{
var texture = sprite.texture;
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//TODO set blend modes..
// check texture..
if(this.currentBatchSize >= this.size)
{
this.flush();
this.currentBaseTexture = texture.baseTexture;
}
// get the uvs for the texture
var uvs = texture._uvs;
// if the uvs have not updated then no point rendering just yet!
if(!uvs)return;
// TODO trim??
var aX = sprite.anchor.x;
var aY = sprite.anchor.y;
var w0, w1, h0, h1;
if (texture.trim)
{
// if the sprite is trimmed then we need to add the extra space before transforming the sprite coords..
var trim = texture.trim;
w1 = trim.x - aX * trim.width;
w0 = w1 + texture.crop.width;
h1 = trim.y - aY * trim.height;
h0 = h1 + texture.crop.height;
}
else
{
w0 = (texture.frame.width ) * (1-aX);
w1 = (texture.frame.width ) * -aX;
h0 = texture.frame.height * (1-aY);
h1 = texture.frame.height * -aY;
}
var index = this.currentBatchSize * 4 * this.vertSize;
var resolution = texture.baseTexture.resolution;
var worldTransform = sprite.worldTransform;
var a = worldTransform.a / resolution;
var b = worldTransform.b / resolution;
var c = worldTransform.c / resolution;
var d = worldTransform.d / resolution;
var tx = worldTransform.tx;
var ty = worldTransform.ty;
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var colors = this.colors;
var positions = this.positions;
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if(this.renderSession.roundPixels)
{
// xy
positions[index] = a * w1 + c * h1 + tx | 0;
positions[index+1] = d * h1 + b * w1 + ty | 0;
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// xy
positions[index+5] = a * w0 + c * h1 + tx | 0;
positions[index+6] = d * h1 + b * w0 + ty | 0;
// xy
positions[index+10] = a * w0 + c * h0 + tx | 0;
positions[index+11] = d * h0 + b * w0 + ty | 0;
// xy
positions[index+15] = a * w1 + c * h0 + tx | 0;
positions[index+16] = d * h0 + b * w1 + ty | 0;
}
else
{
// xy
positions[index] = a * w1 + c * h1 + tx;
positions[index+1] = d * h1 + b * w1 + ty;
// xy
positions[index+5] = a * w0 + c * h1 + tx;
positions[index+6] = d * h1 + b * w0 + ty;
// xy
positions[index+10] = a * w0 + c * h0 + tx;
positions[index+11] = d * h0 + b * w0 + ty;
// xy
positions[index+15] = a * w1 + c * h0 + tx;
positions[index+16] = d * h0 + b * w1 + ty;
}
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// uv
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positions[index+2] = uvs.x0;
positions[index+3] = uvs.y0;
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// uv
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positions[index+7] = uvs.x1;
positions[index+8] = uvs.y1;
// uv
positions[index+12] = uvs.x2;
positions[index+13] = uvs.y2;
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// uv
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positions[index+17] = uvs.x3;
positions[index+18] = uvs.y3;
// color and alpha
var tint = sprite.tint;
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colors[index+4] = colors[index+9] = colors[index+14] = colors[index+19] = (tint >> 16) + (tint & 0xff00) + ((tint & 0xff) &lt;&lt; 16) + (sprite.worldAlpha * 255 &lt;&lt; 24);
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// increment the batchsize
this.sprites[this.currentBatchSize++] = sprite;
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};
/**
* Renders a TilingSprite using the spriteBatch.
*
* @method renderTilingSprite
* @param sprite {TilingSprite} the tilingSprite to render
*/
PIXI.WebGLSpriteBatch.prototype.renderTilingSprite = function(tilingSprite)
{
var texture = tilingSprite.tilingTexture;
// check texture..
if(this.currentBatchSize >= this.size)
{
//return;
this.flush();
this.currentBaseTexture = texture.baseTexture;
}
// set the textures uvs temporarily
// TODO create a separate texture so that we can tile part of a texture
if(!tilingSprite._uvs)tilingSprite._uvs = new PIXI.TextureUvs();
var uvs = tilingSprite._uvs;
tilingSprite.tilePosition.x %= texture.baseTexture.width * tilingSprite.tileScaleOffset.x;
tilingSprite.tilePosition.y %= texture.baseTexture.height * tilingSprite.tileScaleOffset.y;
var offsetX = tilingSprite.tilePosition.x/(texture.baseTexture.width*tilingSprite.tileScaleOffset.x);
var offsetY = tilingSprite.tilePosition.y/(texture.baseTexture.height*tilingSprite.tileScaleOffset.y);
var scaleX = (tilingSprite.width / texture.baseTexture.width) / (tilingSprite.tileScale.x * tilingSprite.tileScaleOffset.x);
var scaleY = (tilingSprite.height / texture.baseTexture.height) / (tilingSprite.tileScale.y * tilingSprite.tileScaleOffset.y);
uvs.x0 = 0 - offsetX;
uvs.y0 = 0 - offsetY;
uvs.x1 = (1 * scaleX) - offsetX;
uvs.y1 = 0 - offsetY;
uvs.x2 = (1 * scaleX) - offsetX;
uvs.y2 = (1 * scaleY) - offsetY;
uvs.x3 = 0 - offsetX;
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uvs.y3 = (1 * scaleY) - offsetY;
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// get the tilingSprites current alpha and tint and combining them into a single color
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var tint = tilingSprite.tint;
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var color = (tint >> 16) + (tint & 0xff00) + ((tint & 0xff) &lt;&lt; 16) + (tilingSprite.alpha * 255 &lt;&lt; 24);
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var positions = this.positions;
var colors = this.colors;
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var width = tilingSprite.width;
var height = tilingSprite.height;
// TODO trim??
var aX = tilingSprite.anchor.x;
var aY = tilingSprite.anchor.y;
var w0 = width * (1-aX);
var w1 = width * -aX;
var h0 = height * (1-aY);
var h1 = height * -aY;
var index = this.currentBatchSize * 4 * this.vertSize;
var resolution = texture.baseTexture.resolution;
var worldTransform = tilingSprite.worldTransform;
var a = worldTransform.a / resolution;//[0];
var b = worldTransform.b / resolution;//[3];
var c = worldTransform.c / resolution;//[1];
var d = worldTransform.d / resolution;//[4];
var tx = worldTransform.tx;//[2];
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var ty = worldTransform.ty;//[5];
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// xy
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positions[index++] = a * w1 + c * h1 + tx;
positions[index++] = d * h1 + b * w1 + ty;
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// uv
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positions[index++] = uvs.x0;
positions[index++] = uvs.y0;
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// color
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colors[index++] = color;
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// xy
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positions[index++] = (a * w0 + c * h1 + tx);
positions[index++] = d * h1 + b * w0 + ty;
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// uv
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positions[index++] = uvs.x1;
positions[index++] = uvs.y1;
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// color
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colors[index++] = color;
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// xy
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positions[index++] = a * w0 + c * h0 + tx;
positions[index++] = d * h0 + b * w0 + ty;
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// uv
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positions[index++] = uvs.x2;
positions[index++] = uvs.y2;
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// color
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colors[index++] = color;
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// xy
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positions[index++] = a * w1 + c * h0 + tx;
positions[index++] = d * h0 + b * w1 + ty;
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// uv
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positions[index++] = uvs.x3;
positions[index++] = uvs.y3;
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// color
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colors[index++] = color;
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// increment the batchsize
this.sprites[this.currentBatchSize++] = tilingSprite;
};
/**
* Renders the content and empties the current batch.
*
* @method flush
*/
PIXI.WebGLSpriteBatch.prototype.flush = function()
{
// If the batch is length 0 then return as there is nothing to draw
if (this.currentBatchSize===0)return;
var gl = this.gl;
var shader;
if(this.dirty)
{
this.dirty = false;
// 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);
shader = this.defaultShader.shaders[gl.id];
// this is the same for each shader?
var stride = this.vertSize * 4;
gl.vertexAttribPointer(shader.aVertexPosition, 2, gl.FLOAT, false, stride, 0);
gl.vertexAttribPointer(shader.aTextureCoord, 2, gl.FLOAT, false, stride, 2 * 4);
Phaser 2.2.0 Docs.
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// color attributes will be interpreted as unsigned bytes and normalized
gl.vertexAttribPointer(shader.colorAttribute, 4, gl.UNSIGNED_BYTE, true, stride, 4 * 4);
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}
// upload the verts to the buffer
if(this.currentBatchSize > ( this.size * 0.5 ) )
{
gl.bufferSubData(gl.ARRAY_BUFFER, 0, this.vertices);
}
else
{
Phaser 2.2.0 Docs.
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var view = this.positions.subarray(0, this.currentBatchSize * 4 * this.vertSize);
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gl.bufferSubData(gl.ARRAY_BUFFER, 0, view);
}
var nextTexture, nextBlendMode, nextShader;
var batchSize = 0;
var start = 0;
var currentBaseTexture = null;
var currentBlendMode = this.renderSession.blendModeManager.currentBlendMode;
var currentShader = null;
var blendSwap = false;
var shaderSwap = false;
var sprite;
for (var i = 0, j = this.currentBatchSize; i &lt; j; i++) {
sprite = this.sprites[i];
nextTexture = sprite.texture.baseTexture;
nextBlendMode = sprite.blendMode;
nextShader = sprite.shader || this.defaultShader;
blendSwap = currentBlendMode !== nextBlendMode;
shaderSwap = currentShader !== nextShader; // should I use _UIDS???
if(currentBaseTexture !== nextTexture || blendSwap || shaderSwap)
{
this.renderBatch(currentBaseTexture, batchSize, start);
start = i;
batchSize = 0;
currentBaseTexture = nextTexture;
if( blendSwap )
{
currentBlendMode = nextBlendMode;
this.renderSession.blendModeManager.setBlendMode( currentBlendMode );
}
if( shaderSwap )
{
currentShader = nextShader;
shader = currentShader.shaders[gl.id];
if(!shader)
{
shader = new PIXI.PixiShader(gl);
shader.fragmentSrc =currentShader.fragmentSrc;
shader.uniforms =currentShader.uniforms;
shader.init();
currentShader.shaders[gl.id] = shader;
}
// set shader function???
this.renderSession.shaderManager.setShader(shader);
if(shader.dirty)shader.syncUniforms();
// both thease only need to be set if they are changing..
// set the projection
var projection = this.renderSession.projection;
gl.uniform2f(shader.projectionVector, projection.x, projection.y);
// TODO - this is temprorary!
var offsetVector = this.renderSession.offset;
gl.uniform2f(shader.offsetVector, offsetVector.x, offsetVector.y);
// set the pointers
}
}
batchSize++;
}
this.renderBatch(currentBaseTexture, batchSize, start);
// then reset the batch!
this.currentBatchSize = 0;
};
/**
* @method renderBatch
* @param texture {Texture}
* @param size {Number}
* @param startIndex {Number}
*/
PIXI.WebGLSpriteBatch.prototype.renderBatch = function(texture, size, startIndex)
{
if(size === 0)return;
var gl = this.gl;
// check if a texture is dirty..
if(texture._dirty[gl.id])
{
this.renderSession.renderer.updateTexture(texture);
}
else
{
// bind the current texture
gl.bindTexture(gl.TEXTURE_2D, texture._glTextures[gl.id]);
}
// now draw those suckas!
gl.drawElements(gl.TRIANGLES, size * 6, gl.UNSIGNED_SHORT, startIndex * 6 * 2);
// increment the draw count
this.renderSession.drawCount++;
};
/**
* @method stop
*/
PIXI.WebGLSpriteBatch.prototype.stop = function()
{
this.flush();
this.dirty = true;
};
/**
* @method start
*/
PIXI.WebGLSpriteBatch.prototype.start = function()
{
this.dirty = true;
};
/**
* Destroys the SpriteBatch.
*
* @method destroy
*/
PIXI.WebGLSpriteBatch.prototype.destroy = function()
{
this.vertices = null;
this.indices = null;
this.gl.deleteBuffer( this.vertexBuffer );
this.gl.deleteBuffer( this.indexBuffer );
this.currentBaseTexture = null;
this.gl = null;
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};</pre>
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