Restructured render texture

fixed bug in canvas renderer
created canvasBuffer object
reworked renderTexture
removed ALL global references

src/pixi/renderers/webgl/utils/WebGLShaderManager.js

@@ -0,0 +1,67 @@
+/**
+ * @author Mat Groves http://matgroves.com/ @Doormat23
+ */
+
+PIXI.WebGLShaderManager = function(gl)
+{
+    this.gl = gl;
+    
+    // this shader is used for the default sprite rendering
+    this.defaultShader = new PIXI.PixiShader(gl);
+    //PIXI.defaultShader = this.defaultShader;
+
+    var shaderProgram = this.defaultShader.program;
+
+    gl.useProgram(shaderProgram);
+
+    gl.enableVertexAttribArray(this.defaultShader.aVertexPosition);
+    gl.enableVertexAttribArray(this.defaultShader.colorAttribute);
+    gl.enableVertexAttribArray(this.defaultShader.aTextureCoord);
+
+    // the next one is used for rendering primatives
+    this.primitiveShader = new PIXI.PrimitiveShader(gl);
+   
+
+    // the final one is used for the rendering strips
+    //this.stripShader = new PIXI.StripShader(gl);
+}
+
+
+PIXI.WebGLShaderManager.prototype.activatePrimitiveShader = function()
+{
+    var gl = this.gl;
+
+    gl.useProgram(this.primitiveShader.program);
+
+    gl.disableVertexAttribArray(this.defaultShader.aVertexPosition);
+    gl.disableVertexAttribArray(this.defaultShader.colorAttribute);
+    gl.disableVertexAttribArray(this.defaultShader.aTextureCoord);
+
+    gl.enableVertexAttribArray(this.primitiveShader.aVertexPosition);
+    gl.enableVertexAttribArray(this.primitiveShader.colorAttribute);
+};
+
+PIXI.WebGLShaderManager.prototype.deactivatePrimitiveShader = function()
+{
+    var gl = this.gl;
+
+    gl.useProgram(this.defaultShader.program);
+
+    gl.disableVertexAttribArray(this.primitiveShader.aVertexPosition);
+    gl.disableVertexAttribArray(this.primitiveShader.colorAttribute);
+
+    gl.enableVertexAttribArray(this.defaultShader.aVertexPosition);
+    gl.enableVertexAttribArray(this.defaultShader.colorAttribute);
+    gl.enableVertexAttribArray(this.defaultShader.aTextureCoord);
+};
+
+
+PIXI.WebGLShaderManager.prototype.pushShader = function(maskData, renderSession)
+{ 
+    // push a shader onto the stack..
+}
+
+PIXI.WebGLShaderManager.prototype.popShader = function(renderSession)
+{
+    // push 
+}