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Utils.js
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Utils.js
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/*
* X3DOM JavaScript Library
* http://www.x3dom.org
*
* (C)2009 Fraunhofer IGD, Darmstadt, Germany
* Dual licensed under the MIT and GPL
*
* Based on code originally provided by
* Philip Taylor: http://philip.html5.org
*/
/*****************************************************************************
* Utils class holds utility functions for renderer
*****************************************************************************/
x3dom.Utils = {};
x3dom.Utils.maxIndexableCoords = 65535;
x3dom.Utils.needLineWidth = false; // lineWidth not impl. in IE11
x3dom.Utils.measurements = [];
// http://gent.ilcore.com/2012/06/better-timer-for-javascript.html
window.performance = window.performance || {};
performance.now = ( function ()
{
return performance.now ||
performance.mozNow ||
performance.msNow ||
performance.oNow ||
performance.webkitNow ||
function ()
{
return new Date().getTime();
};
} )();
x3dom.Utils.startMeasure = function ( name )
{
var uname = name.toUpperCase();
if ( !x3dom.Utils.measurements[ uname ] )
{
x3dom.Utils.measurements[ uname ] = performance.now();
}
};
x3dom.Utils.stopMeasure = function ( name )
{
var uname = name.toUpperCase();
if ( x3dom.Utils.measurements[ uname ] )
{
var startTime = x3dom.Utils.measurements[ uname ];
delete x3dom.Utils.measurements[ uname ];
return performance.now() - startTime;
}
return 0;
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.isNumber = function ( n )
{
return !isNaN( parseFloat( n ) ) && isFinite( n );
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.createTexture2D = function ( gl, doc, src, bgnd, crossOrigin, scale, genMipMaps, flipY, tex )
{
flipY = flipY || false;
var texture = gl.createTexture();
//Create a black 4 pixel texture to prevent 'texture not complete' warning
var data = new Uint8Array( [ 0, 0, 0, 255, 0, 0, 0, 255, 0, 0, 0, 255, 0, 0, 0, 255 ] );
gl.bindTexture( gl.TEXTURE_2D, texture );
gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );
if ( genMipMaps )
{
gl.generateMipmap( gl.TEXTURE_2D );
}
gl.bindTexture( gl.TEXTURE_2D, null );
texture.ready = false;
var urlIndex = 0;
if ( src == null || src == "" )
{return texture;}
var image = new Image();
switch ( crossOrigin.toLowerCase() )
{
case "anonymous": {
image.crossOrigin = "anonymous";
} break;
case "use-credentials": {
image.crossOrigin = "use-credentials";
} break;
case "none": {
//this is needed to omit the default case, if default is none, erase this and the default case
} break;
default: {
if ( x3dom.Utils.forbiddenBySOP( src ) )
{
image.crossOrigin = "anonymous";
}
}
}
var requestImageWithChannelCount = function ()
{
if ( tex && tex.getOrigChannelCount() === 0 )
{
var xhr = new XMLHttpRequest();
xhr.open( "GET", src );
xhr.onloadstart = function ()
{
xhr.responseType = "arraybuffer";
};
xhr.onload = function ()
{
var mimeType = xhr.getResponseHeader( "Content-Type" ),
imageData = new Uint8Array( xhr.response ),
channelcount = x3dom.Utils.detectChannelCount( imageData, mimeType );
if ( channelcount )
{
tex.setOrigChannelCount( channelcount );
}
image.src = x3dom.Utils.arrayBufferToObjectURL( imageData, mimeType );
};
xhr.onerror = function ()
{
x3dom.debug.logError( "[Utils|createTexture2D] Can't http request: " + src );
// always try to load, to trigger image.onerror if unsuccessful
image.src = src;
};
x3dom.RequestManager.addRequest( xhr );
}
else
{
image.src = src;
}
doc.incrementDownloads();
};
requestImageWithChannelCount();
image.onload = function ()
{
texture.originalWidth = image.width;
texture.originalHeight = image.height;
if ( scale )
{image = x3dom.Utils.scaleImage( image );}
if ( bgnd == true || flipY == true )
{
gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, true );
}
gl.bindTexture( gl.TEXTURE_2D, texture );
if ( tex && tex._vf.colorSpaceConversion == false )
{
gl.pixelStorei( gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE );
}
//gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, false);
gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image );
if ( genMipMaps )
{
gl.generateMipmap( gl.TEXTURE_2D );
}
gl.bindTexture( gl.TEXTURE_2D, null );
if ( bgnd == true || flipY == true )
{
gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, false );
}
//Save image size
texture.width = image.width;
texture.height = image.height;
texture.ready = true;
doc.decrementDownloads();
doc.needRender = true;
};
image.onerror = function ( error )
{
x3dom.Utils.tryDDSLoading( texture, gl, doc, src, genMipMaps, flipY, tex ).then( function ()
{
doc.decrementDownloads();
doc.needRender = true;
}, function ()
{
x3dom.debug.logError( "[Utils|createTexture2D] Can't load Image: " + src );
doc.decrementDownloads();
urlIndex++;
if ( tex && urlIndex < tex._vf.url.length )
{
src = tex._nameSpace.getURL( tex._vf.url[ urlIndex ] );
requestImageWithChannelCount();
}
} );
};
return texture;
};
x3dom.Utils.tryDDSLoading = function ( texture, gl, doc, src, genMipMaps, flipY, tex )
{
return x3dom.DDSLoader.load( src ).then( function ( dds )
{
if ( !dds || ( dds.isCompressed && !x3dom.caps.COMPRESSED_TEXTURE ) )
{
return;
}
gl.bindTexture( dds.type, texture );
flipY = false;
if ( flipY )
{
gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, true );
}
if ( !x3dom.Utils.isPowerOfTwo( dds.width ) && !x3dom.Utils.isPowerOfTwo( dds.height ) )
{
gl.texParameteri( dds.type, gl.TEXTURE_MAG_FILTER, gl.LINEAR );
gl.texParameteri( dds.type, gl.TEXTURE_MIN_FILTER, gl.LINEAR );
gl.texParameteri( dds.type, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE );
gl.texParameteri( dds.type, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE );
dds.generateMipmaps = false;
}
else if ( dds.generateMipmaps )
{
gl.texParameteri( dds.type, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR );
}
for ( var target in dds.data )
{
var width = dds.width;
var height = dds.height;
var levels = dds.data[ target ];
for ( var l = 0; l < levels.length; l++ )
{
if ( l != 0 )
{
width = Math.max( width * 0.5, 1 );
height = Math.max( height * 0.5, 1 );
}
if ( dds.format.internal < 33776 || dds.format.internal > 33779 )
{
gl.texImage2D( +target, l, dds.format.internal, width, height, 0, dds.format.format, dds.format.type, levels[ l ] );
}
else
{
gl.compressedTexImage2D( +target, l, dds.format.internal, width, height, 0, levels[ l ] );
dds.generateMipmaps = false;
}
}
}
if ( dds.generateMipmaps )
{
gl.generateMipmap( dds.type );
}
// if ( flipY )
// {
// gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, false );
// }
gl.bindTexture( dds.type, null );
texture.width = dds.width;
texture.height = dds.height;
texture.ready = true;
texture.textureCubeReady = true;
if ( tex && dds.channelCount )
{
tex.setOrigChannelCount( dds.channelCount );
}
} );
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.createTextureCube = function ( gl, doc, src, bgnd, crossOrigin, scale, genMipMaps, flipY )
{
//Create a black 4 pixel texture to prevent 'texture not complete' warning
var data = new Uint8Array( [ 0, 0, 0, 255, 0, 0, 0, 255, 0, 0, 0, 255, 0, 0, 0, 255 ] );
var texture = gl.createTexture();
var faces;
if ( bgnd )
{
faces = [ gl.TEXTURE_CUBE_MAP_POSITIVE_Z, gl.TEXTURE_CUBE_MAP_NEGATIVE_Z,
gl.TEXTURE_CUBE_MAP_POSITIVE_Y, gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
gl.TEXTURE_CUBE_MAP_POSITIVE_X, gl.TEXTURE_CUBE_MAP_NEGATIVE_X ];
}
else
{
// back, front, bottom, top, left, right
faces = [ gl.TEXTURE_CUBE_MAP_NEGATIVE_Z, gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Y, gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
gl.TEXTURE_CUBE_MAP_NEGATIVE_X, gl.TEXTURE_CUBE_MAP_POSITIVE_X ];
}
texture.ready = false;
texture.pendingTextureLoads = -1;
texture.textureCubeReady = false;
var width = 0,
height = 0;
for ( var i = 0; i < faces.length; i++ )
{
gl.bindTexture( gl.TEXTURE_CUBE_MAP, texture );
gl.texImage2D( faces[ i ], 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );
gl.bindTexture( gl.TEXTURE_CUBE_MAP, null );
}
if ( src.length == 1 )
{
doc.incrementDownloads();
x3dom.Utils.tryDDSLoading( texture, gl, doc, src[ 0 ], genMipMaps, flipY ).then( function ()
{
doc.decrementDownloads();
doc.needRender = true;
}, function ()
{
x3dom.debug.logError( "[Utils|createTexture2D] Can't load Image: " + src );
doc.decrementDownloads();
} );
}
else if ( src.length == 6 )
{
for ( var i = 0; i < faces.length; i++ )
{
var face = faces[ i ];
var image = new Image();
switch ( crossOrigin.toLowerCase() )
{
case "anonymous": {
image.crossOrigin = "anonymous";
} break;
case "use-credentials": {
image.crossOrigin = "use-credentials";
} break;
case "none": {
//this is needed to omit the default case, if default is none, erase this and the default case
} break;
default: {
if ( x3dom.Utils.forbiddenBySOP( src[ i ] ) )
{
image.crossOrigin = "anonymous";
}
}
}
texture.pendingTextureLoads++;
doc.incrementDownloads();
image.onload = ( function ( texture, face, image, swap )
{
return function ()
{
if ( width == 0 && height == 0 )
{
width = image.width;
height = image.height;
}
else if ( scale && ( width != image.width || height != image.height ) )
{
x3dom.debug.logWarning( "[Utils|createTextureCube] Rescaling CubeMap images, which are of different size!" );
image = x3dom.Utils.rescaleImage( image, width, height );
}
gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, swap );
gl.bindTexture( gl.TEXTURE_CUBE_MAP, texture );
gl.texImage2D( face, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image );
gl.bindTexture( gl.TEXTURE_CUBE_MAP, null );
gl.pixelStorei( gl.UNPACK_FLIP_Y_WEBGL, false );
texture.pendingTextureLoads--;
doc.decrementDownloads();
if ( texture.pendingTextureLoads < 0 )
{
//Save image size also for cube tex
texture.width = width;
texture.height = height;
texture.textureCubeReady = true;
if ( genMipMaps )
{
gl.bindTexture( gl.TEXTURE_CUBE_MAP, texture );
gl.generateMipmap( gl.TEXTURE_CUBE_MAP );
gl.bindTexture( gl.TEXTURE_CUBE_MAP, null );
}
x3dom.debug.logInfo( "[Utils|createTextureCube] Loading CubeMap finished..." );
doc.needRender = true;
}
};
} )( texture, face, image, bgnd );
image.onerror = function ()
{
doc.decrementDownloads();
x3dom.debug.logError( "[Utils|createTextureCube] Can't load CubeMap!" );
};
// backUrl, frontUrl, bottomUrl, topUrl, leftUrl, rightUrl (for bgnd)
image.src = src[ i ];
}
}
return texture;
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.detectChannelCount = function ( data, mimeType )
{
switch ( mimeType )
{
case "image/jpeg":
return x3dom.Utils.detectChannelCountJPG( data );
case "image/png":
return x3dom.Utils.detectChannelCountPNG( data );
case "image/gif":
return x3dom.Utils.detectChannelCountGIF( data );
}
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.detectChannelCountJPG = function ( data )
{
if ( data[ 0 ] != 0xff ) {return;}
if ( data[ 1 ] != 0xd8 ) {return;}
var pos = 2;
var dv = new DataView( data.buffer, data.byteOffset, data.byteLength );
while ( pos + 4 < data.byteLength )
{
if ( data[ pos ] != 0xff )
{
pos += 1;
continue;
}
var type = data[ pos + 1 ];
pos += 2;
if ( data[ pos ] == 0xff )
{
continue;
}
var length = dv.getUint16( pos );
if ( pos + length > data.byteLength )
{
return;
}
if ( length >= 7 && ( type == 0xc0 || type == 0xc2 ) )
{
return data[ pos + 7 ];
}
pos += length;
}
return;
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.detectChannelCountPNG = function ( data )
{
if ( data.byteLength < 29 ) {return;}
// PNG header
if ( data[ 0 ] != 0x89 ) {return;}
if ( data[ 1 ] != 0x50 ) {return;}
if ( data[ 2 ] != 0x4e ) {return;}
if ( data[ 3 ] != 0x47 ) {return;}
if ( data[ 4 ] != 0x0d ) {return;}
if ( data[ 5 ] != 0x0a ) {return;}
if ( data[ 6 ] != 0x1a ) {return;}
if ( data[ 7 ] != 0x0a ) {return;}
// "IHDR"
if ( data[ 12 ] != 0x49 ) {return;}
if ( data[ 13 ] != 0x48 ) {return;}
if ( data[ 14 ] != 0x44 ) {return;}
if ( data[ 15 ] != 0x52 ) {return;}
if ( data[ 25 ] == 0 ) {return 1;}
if ( data[ 25 ] == 2 ) {return 3;}
if ( data[ 25 ] == 4 ) {return 2;}
if ( data[ 25 ] == 6 ) {return 4;}
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.detectChannelCountGIF = function ( data )
{
if ( data[ 0 ] != 0x47 ) {return;}
if ( data[ 1 ] != 0x49 ) {return;}
if ( data[ 2 ] != 0x46 ) {return;}
if ( data[ 3 ] != 0x38 ) {return;}
if ( data[ 4 ] != 0x37 && data[ 4 ] != 0x39 ) {return;}
if ( data[ 5 ] != 0x61 ) {return;}
if ( data[ 10 ] & 0x01 )
{
var length = data[ 10 ] & 0xE0;
for ( var i = 13; i < length; i += 3 )
{
if ( data[ i ] != data[ i + 1 ] || data[ i ] != data[ i + 2 ] || data[ i + 1 ] != data[ i + 2 ] )
{
return 3;
}
}
return 1;
}
//TODO check local color table of the image block
};
/*****************************************************************************
* Initialize framebuffer object and associated texture(s)
*****************************************************************************/
x3dom.Utils.initFBO = function ( gl, w, h, type, mipMap, needDepthBuf, numMrt )
{
var tex = gl.createTexture();
tex.width = w;
tex.height = h;
gl.bindTexture( gl.TEXTURE_2D, tex );
gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, w, h, 0, gl.RGBA, type, null );
if ( mipMap )
{gl.generateMipmap( gl.TEXTURE_2D );}
gl.bindTexture( gl.TEXTURE_2D, null );
var i,
mrts = null;
if ( x3dom.caps.DRAW_BUFFERS && numMrt !== undefined )
{
mrts = [ tex ];
for ( i = 1; i < numMrt; i++ )
{
mrts[ i ] = gl.createTexture();
mrts[ i ].width = w;
mrts[ i ].height = h;
gl.bindTexture( gl.TEXTURE_2D, mrts[ i ] );
gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, w, h, 0, gl.RGBA, type, null );
if ( mipMap )
{gl.generateMipmap( gl.TEXTURE_2D );}
gl.bindTexture( gl.TEXTURE_2D, null );
}
}
var fbo = gl.createFramebuffer();
var dtex = null;
var rb = null;
if ( needDepthBuf )
{
if ( x3dom.caps.DEPTH_TEXTURE !== null )
{
dtex = gl.createTexture();
gl.bindTexture( gl.TEXTURE_2D, dtex );
gl.texImage2D( gl.TEXTURE_2D, 0, gl.DEPTH_COMPONENT, w, h, 0, gl.DEPTH_COMPONENT, gl.UNSIGNED_SHORT, null );
if ( mipMap )
{gl.generateMipmap( gl.TEXTURE_2D );}
gl.bindTexture( gl.TEXTURE_2D, null );
dtex.width = w;
dtex.height = h;
}
else
{
rb = gl.createRenderbuffer();
gl.bindRenderbuffer( gl.RENDERBUFFER, rb );
gl.renderbufferStorage( gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, w, h );
gl.bindRenderbuffer( gl.RENDERBUFFER, null );
}
}
gl.bindFramebuffer( gl.FRAMEBUFFER, fbo );
gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0 );
if ( x3dom.caps.DRAW_BUFFERS && numMrt !== undefined )
{
for ( i = 1; i < numMrt; i++ )
{
gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0 + i, gl.TEXTURE_2D, mrts[ i ], 0 );
}
}
if ( needDepthBuf && x3dom.caps.DEPTH_TEXTURE !== null )
{
gl.framebufferTexture2D( gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, dtex, 0 );
}
else
{
gl.framebufferRenderbuffer( gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, rb );
}
var status = gl.checkFramebufferStatus( gl.FRAMEBUFFER );
if ( status != gl.FRAMEBUFFER_COMPLETE )
{
x3dom.debug.logWarning( "[Utils|InitFBO] FBO-Status: " + status );
}
gl.bindFramebuffer( gl.FRAMEBUFFER, null );
return {
fbo : fbo,
dtex : dtex,
rbo : rb,
tex : tex,
texTargets : mrts,
width : w,
height : h,
type : type,
mipMap : mipMap
};
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.getFileName = function ( url )
{
var filename;
if ( url.lastIndexOf( "/" ) > -1 )
{
filename = url.substr( url.lastIndexOf( "/" ) + 1 );
}
else if ( url.lastIndexOf( "\\" ) > -1 )
{
filename = url.substr( url.lastIndexOf( "\\" ) + 1 );
}
else
{
filename = url;
}
return filename;
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.isWebGL2Enabled = function ()
{
var canvas = document.createElement( "canvas" );
var webgl2 = canvas.getContext( "webgl2" ) || canvas.getContext( "experimental-webgl2" );
return ( webgl2 ) ? true : false;
};
/*****************************************************************************
*
*****************************************************************************/
x3dom.Utils.findTextureByName = function ( texture, name )
{
for ( var i = 0; i < texture.length; ++i )
{
if ( name == texture[ i ].samplerName )
{return texture[ i ];}
}
return false;
};
/*****************************************************************************
* Rescale image to given size
*****************************************************************************/
x3dom.Utils.rescaleImage = function ( image, width, height )
{
var canvas = document.createElement( "canvas" );
canvas.width = width; canvas.height = height;
canvas.getContext( "2d" ).drawImage( image,
0, 0, image.width, image.height,
0, 0, canvas.width, canvas.height );
return canvas;
};
/*****************************************************************************
* Scale image to next best power of two
*****************************************************************************/
x3dom.Utils.scaleImage = function ( image )
{
if ( !x3dom.Utils.isPowerOfTwo( image.width ) || !x3dom.Utils.isPowerOfTwo( image.height ) )
{
var canvas = document.createElement( "canvas" );
canvas.width = x3dom.Utils.nextHighestPowerOfTwo( image.width );
canvas.height = x3dom.Utils.nextHighestPowerOfTwo( image.height );
var ctx = canvas.getContext( "2d" );
ctx.drawImage( image,
0, 0, image.width, image.height,
0, 0, canvas.width, canvas.height );
image = canvas;
}
return image;
};
/*****************************************************************************
* Check if value is power of two
*****************************************************************************/
x3dom.Utils.isPowerOfTwo = function ( x )
{
return ( ( x & ( x - 1 ) ) === 0 );
};
/*****************************************************************************
* Return next highest power of two
*****************************************************************************/
x3dom.Utils.nextHighestPowerOfTwo = function ( x )
{
--x;
for ( var i = 1; i < 32; i <<= 1 )
{
x = x | x >> i;
}
return ( x + 1 );
};
/*****************************************************************************
* Return next best power of two
*****************************************************************************/
x3dom.Utils.nextBestPowerOfTwo = function ( x )
{
// use precomputed log(2.0) = 0.693147180559945
var log2x = Math.log( x ) / 0.693147180559945;
return Math.pow( 2, Math.round( log2x ) );
};
/*****************************************************************************
* Return data type size in byte
*****************************************************************************/
x3dom.Utils.getDataTypeSize = function ( type )
{
switch ( type )
{
case "Int8":
case "Uint8":
return 1;
case "Int16":
case "Uint16":
return 2;
case "Int32":
case "Uint32":
case "Float32":
return 4;
case "Float64":
default:
return 8;
}
};
/*****************************************************************************
* Return offset multiplier (Uint32 is twice as big as Uint16)
*****************************************************************************/
x3dom.Utils.getOffsetMultiplier = function ( indexType, gl )
{
switch ( indexType )
{
case gl.UNSIGNED_SHORT:
return 1;
case gl.UNSIGNED_INT:
return 2;
case gl.UNSIGNED_BYTE:
return 0.5;
default:
return 1;
}
};
/*****************************************************************************
* Return byte aware offset
*****************************************************************************/
x3dom.Utils.getByteAwareOffset = function ( offset, indexType, gl )
{
switch ( indexType )
{
case gl.UNSIGNED_SHORT:
return 2 * offset;
case gl.UNSIGNED_INT:
return 4 * offset;
case gl.UNSIGNED_BYTE:
return offset;
default:
return 2 * offset;
}
};
/*****************************************************************************
* Return this.gl-Type
*****************************************************************************/
x3dom.Utils.getVertexAttribType = function ( type, gl )
{
var dataType = gl.NONE;
switch ( type )
{
case "Int8":
dataType = gl.BYTE;
break;
case "Uint8":
dataType = gl.UNSIGNED_BYTE;
break;
case "Int16":
dataType = gl.SHORT;
break;
case "Uint16":
dataType = gl.UNSIGNED_SHORT;
break;
case "Int32":
dataType = gl.INT;
break;
case "Uint32":
dataType = gl.UNSIGNED_INT;
break;
case "Float32":
dataType = gl.FLOAT;
break;
case "Float64":
default:
x3dom.debug.logError( "Can't find this.gl data type for " + type + ", getting FLOAT..." );
dataType = gl.FLOAT;
break;
}
return dataType;
};
/*****************************************************************************
* Return TypedArray View
*****************************************************************************/
x3dom.Utils.getArrayBufferView = function ( type, buffer )
{
var array = null;
switch ( type )
{
case "Int8":
array = new Int8Array( buffer );
break;
case "Uint8":
array = new Uint8Array( buffer );
break;
case "Int16":
array = new Int16Array( buffer );
break;
case "Uint16":
array = new Uint16Array( buffer );
break;
case "Int32":
array = new Int32Array( buffer );
break;
case "Uint32":
array = new Uint32Array( buffer );
break;
case "Float32":
array = new Float32Array( buffer );
break;
case "Float64":
array = new Float64Array( buffer );
break;
default:
x3dom.debug.logError( "Can't create typed array view of type " + type + ", trying Float32..." );
array = new Float32Array( buffer );
break;
}
return array;
};
/*****************************************************************************
* Checks whether a TypedArray View Type with the given name string is unsigned
*****************************************************************************/
x3dom.Utils.isUnsignedType = function ( str )
{
return ( str == "Uint8" || str == "Uint16" || str == "Uint16" || str == "Uint32" );
};
/*****************************************************************************
* Checks for lighting
*****************************************************************************/
x3dom.Utils.checkDirtyLighting = function ( viewarea )
{
return ( viewarea.getLights().length + viewarea._scene.getNavigationInfo()._vf.headlight + ( viewarea._scene.getFog()._vf.visibilityRange > 0 ) );
};
/*****************************************************************************
* Checks for PhysicalEnvironmentLight change
*****************************************************************************/
x3dom.Utils.checkDirtyPhysicalEnvironmentLight = function ( viewarea, shaderProperties )
{
return ( !!shaderProperties.PHYSICALENVLIGHT != viewarea.hasPhysicalEnvironmentLight() );
};
/*****************************************************************************
* Checks for environment
*****************************************************************************/
x3dom.Utils.checkDirtyEnvironment = function ( viewarea, shaderProperties )
{
var environment = viewarea._scene.getEnvironment();
return ( shaderProperties.GAMMACORRECTION != environment._vf.gammaCorrectionDefault );
};
/*****************************************************************************
* Get GL min filter
*****************************************************************************/
x3dom.Utils.minFilterDic = function ( gl, minFilter )
{
switch ( minFilter.toUpperCase() )
{
case "NEAREST": return gl.NEAREST;
case "LINEAR": return gl.LINEAR;
case "NEAREST_MIPMAP_NEAREST": return gl.NEAREST_MIPMAP_NEAREST;
case "NEAREST_MIPMAP_LINEAR": return gl.NEAREST_MIPMAP_LINEAR;
case "LINEAR_MIPMAP_NEAREST": return gl.LINEAR_MIPMAP_NEAREST;
case "LINEAR_MIPMAP_LINEAR": return gl.LINEAR_MIPMAP_LINEAR;
case "AVG_PIXEL": return gl.LINEAR;
case "AVG_PIXEL_AVG_MIPMAP": return gl.LINEAR_MIPMAP_LINEAR;
case "AVG_PIXEL_NEAREST_MIPMAP": return gl.LINEAR_MIPMAP_NEAREST;
case "DEFAULT": return gl.LINEAR_MIPMAP_LINEAR;
case "FASTEST": return gl.NEAREST;
case "NEAREST_PIXEL": return gl.NEAREST;
case "NEAREST_PIXEL_AVG_MIPMAP": return gl.NEAREST_MIPMAP_LINEAR;
case "NEAREST_PIXEL_NEAREST_MIPMAP": return gl.NEAREST_MIPMAP_NEAREST;
case "NICEST": return gl.LINEAR_MIPMAP_LINEAR;
default: return gl.LINEAR;
}
};
/*****************************************************************************
* Get GL min filter
*****************************************************************************/
x3dom.Utils.minFilterDicX3D = function ( minFilter )
{
switch ( minFilter )
{
case 9728: return "NEAREST";
case 9729: return "LINEAR";
case 9984: return "NEAREST_MIPMAP_NEAREST";
case 9985: return "LINEAR_MIPMAP_NEAREST";
case 9986: return "NEAREST_MIPMAP_LINEAR";
case 9987: return "LINEAR_MIPMAP_LINEAR";
default: return "LINEAR_MIPMAP_LINEAR";
}
};
/*****************************************************************************
* Get GL mag filter
*****************************************************************************/