mirror of
https://github.com/MapMakersAndProgrammers/Alternativa3D.git
synced 2025-10-26 09:59:10 -07:00
75 lines
2.4 KiB
ActionScript
75 lines
2.4 KiB
ActionScript
/**
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* This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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* If it is not possible or desirable to put the notice in a particular file, then You may include the notice in a location (such as a LICENSE file in a relevant directory) where a recipient would be likely to look for such a notice.
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* You may add additional accurate notices of copyright ownership.
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*
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* It is desirable to notify that Covered Software was "Powered by AlternativaPlatform" with link to http://www.alternativaplatform.com/
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* */
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package alternativa.engine3d.materials.compiler {
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import flash.utils.ByteArray;
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/**
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* @private
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*/
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public class DestinationVariable extends Variable {
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public function DestinationVariable(source:String) {
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var strType : String = source.match(/[tovid]/)[0];
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index = parseInt(source.match(/\d+/)[0], 10);
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var swizzle:Array = source.match(/\.[xyzw]{1,4}/);
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var regmask:uint;
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var maskmatch:String = swizzle ? swizzle[0] : null;
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if (maskmatch != null) {
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regmask = 0;
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var cv:int;
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var maskLength:uint = maskmatch.length;
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// If first char is point, then skip
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for (var i:int = 1; i < maskLength; i++) {
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cv = maskmatch.charCodeAt(i) - X_CHAR_CODE;
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if (cv == -1) cv = 3;
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regmask |= 1 << cv;
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}
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} else {
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regmask = 0xf;
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// id swizzle or mask
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}
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lowerCode = (regmask << 16) | index;
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switch(strType){
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case "t":
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lowerCode |= 0x2000000;
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type = VariableType.TEMPORARY;
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break;
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case "o":
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lowerCode |= 0x3000000;
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type = VariableType.OUTPUT;
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break;
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case "v":
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lowerCode |= 0x4000000;
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type = VariableType.VARYING;
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break;
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case "d":
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lowerCode |= 0x6000000;
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type = VariableType.DEPTH;
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break;
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case "i":
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lowerCode |= 0x7000000;
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type = VariableType.INPUT;
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break;
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default :
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throw new ArgumentError('Wrong destination register type, must be "t" or "o" or "v" or "d", var = ' + source);
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break;
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}
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}
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override public function writeToByteArray(byteCode:ByteArray, newIndex:int, newType:int, offset:int = 0):void {
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byteCode.position = position + offset;
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byteCode.writeUnsignedInt((lowerCode & ~(0xf00ffff)) | newIndex | (newType << 24));
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}
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}
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}
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