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/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
</copyright> */
var Material = require("js/lib/rdge/materials/material").Material;
///////////////////////////////////////////////////////////////////////
// Class GLTexture
// GL representation of a texture.
///////////////////////////////////////////////////////////////////////
function Texture( dstWorld )
{
///////////////////////////////////////////////////////////////////////
// Instance variables
///////////////////////////////////////////////////////////////////////
this._texture;
// texture attributes
this._texMapName;
this._wrap;
this._mips;
this._srcCanvas; // the canvas generating the texture map.
this._dstWorld; // the world that will use the texture map
this._dstWorld = dstWorld;
///////////////////////////////////////////////////////////////////////
// Property Accessors
///////////////////////////////////////////////////////////////////////
this.getTexture = function() { return this._texture; }
this.setSrcWorld = function(w) { this._srcWorld = w; }
this.getSrcWorld = function() { return this._srcWorld; }
this.setDstWorld = function(w) { this._dstWorld = w; }
this.getDstWorld = function() { return this._dstWorld; }
this.isAnimated = function() { return this._isAnimated; }
///////////////////////////////////////////////////////////////////////
// Methods
///////////////////////////////////////////////////////////////////////
this.loadFromFile = function( texMapName, wrap, mips )
{
var tex = this._texture;
this._srcCanvas = null;
// only load if something has changed
if (this._texMapName !== texMapName) // does RDGE allow us to change wrap or mips?
{
this._texMapName = texMapName.slice();
this._wrap = wrap;
this._mips = mips;
var dstWorld = this.getDstWorld();
if (dstWorld)
{
var renderer = dstWorld.getRenderer();
tex = renderer.getTextureByName(texMapName, wrap, mips );
this._texture = tex;
dstWorld.textureToLoad( tex );
}
}
return tex;
}
var __texCounter = 0;
this.loadFromCanvas = function( srcCanvas, wrap, mips )
{
this._srcCanvas = srcCanvas;
this._texMapName = "GLTexture_" + __texCounter;
__texCounter++;
// set default values for wrap and mips
if (wrap === undefined)
wrap = "REPEAT";
if (mips === undefined)
mips = true;
// we animate only if the source is an animated GLWorld
if (srcCanvas.elementModel && srcCanvas.elementModel.shapeModel && srcCanvas.elementModel.shapeModel.GLWorld)
this._isAnimated = srcCanvas.elementModel.shapeModel.GLWorld._hasAnimatedMaterials;
// create the texture
var world = this.getDstWorld();
tex = world.getGLContext().createTexture();
this._texture = tex;
tex.texparams = new _texparams(wrap, mips); // defined in renderer.js
tex.image = new Image;
// create the canvas and context to render into
var doc = srcCanvas.ownerDocument;
this._renderCanvas = doc.createElement("canvas");
// cache whether this is a 2D canvas or 3D canvas
var srcCtx = srcCanvas.getContext("2d");
this._is3D = false;
if (!srcCtx) this._is3D = true;
this.rerender();
return tex;
}
this.rerender = function()
{
if (!this._srcCanvas)
{
console.log( " no source canvas in GLTexture.rerender" );
return;
}
var srcCanvas = this._srcCanvas;
var world = this.getDstWorld();
if (!world)
{
console.log( "no world in GLTexture.rerender" );
return;
}
var renderer = world.getRenderer();
var imageData;
var width = srcCanvas.width, height = srcCanvas.height;
if (!this.isPowerOfTwo(width) || !this.isPowerOfTwo(height))
{
width = this.nextHighestPowerOfTwo( width );
height = this.nextHighestPowerOfTwo( height );
//width = 64; height = 64;
}
// create a canvas to be used as the image for the texture map
var doc = srcCanvas.ownerDocument;
var renderCanvas = this._renderCanvas;
if (!renderCanvas)
{
console.log( "no render canvas in GLTexture.rerender" );
return;
}
renderCanvas.width = width;
renderCanvas.height = height;
var renderCtx = renderCanvas.getContext("2d");
// create the texture
var tex = this._texture;
if (!tex)
{
console.log( "no texture in GLTexture.rerender" );
return;
}
var srcCtx;
if (!this._is3D)
{
srcCtx = srcCanvas.getContext("2d");
imageData = srcCtx.getImageData( 0, 0, width, height );
renderCtx.putImageData( imageData, 0, 0 );
}
else
{
srcCtx = srcCanvas.getContext("experimental-webgl");
if (srcCtx)
{
renderCtx.drawImage(srcCanvas, 0, 0);
// var data = new Uint8Array(width * height * 4);
// srcCtx.readPixels(0, 0, width, height, srcCtx.RGBA, srcCtx.UNSIGNED_BYTE, data);
// imageData = renderCtx.createImageData(width, height);
// var nBytes = width*height*4;
// for (var i=0; i<nBytes; i++)
// imageData.data[i] = data[i];
// renderCtx.putImageData( imageData, 0, 0 );
}
}
/////////////////
tex.image = renderCanvas;
renderer.commitTexture( tex );
return tex;
}
this.isPowerOfTwo = function(x)
{
return (x & (x - 1)) == 0;
}
this.nextHighestPowerOfTwo = function(x)
{
--x;
for (var i = 1; i < 32; i <<= 1) {
x = x | x >> i;
}
return x + 1;
}
}
if (typeof exports === "object") {
exports.Texture = Texture;
}
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