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function-node.js
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1194 lines (1094 loc) · 32.6 KB
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'use strict';
const FunctionNodeBase = require('../function-node-base');
const utils = require('../../core/utils');
// Closure capture for the ast function, prevent collision with existing AST functions
// The prefixes to use
const jsMathPrefix = 'Math.';
const localPrefix = 'this.';
const constantsPrefix = 'this.constants.';
const DECODE32_ENCODE32 = /decode32\(\s+encode32\(/g;
const ENCODE32_DECODE32 = /encode32\(\s+decode32\(/g;
/**
* @class WebGLFunctionNode
*
* @desc [INTERNAL] Takes in a function node, and does all the AST voodoo required to generate its respective webGL code.
*
* @extends FunctionNodeBase
*
* @param {functionNode} inNode - The function node object
*
* @returns the converted webGL function string
*
*/
module.exports = class WebGLFunctionNode extends FunctionNodeBase {
generate() {
if (this.debug) {
console.log(this);
}
if (this.prototypeOnly) {
return WebGLFunctionNode.astFunctionPrototype(this.getJsAST(), [], this).join('').trim();
} else {
this.functionStringArray = this.astGeneric(this.getJsAST(), [], this);
}
this.functionString = webGlRegexOptimize(
this.functionStringArray.join('').trim()
);
return this.functionString;
}
isIdentifierConstant(paramName) {
if (!this.constants) return false;
return this.constants.hasOwnProperty(paramName);
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astGeneric
*
* @desc Parses the abstract syntax tree for generically to its respective function
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {String} the prased openclgl string array
*/
astGeneric(ast, retArr, funcParam) {
if (ast === null) {
throw astErrorOutput('NULL ast', ast, funcParam);
} else {
if (Array.isArray(ast)) {
for (let i = 0; i < ast.length; i++) {
this.astGeneric(ast[i], retArr, funcParam);
}
return retArr;
}
switch (ast.type) {
case 'FunctionDeclaration':
return this.astFunctionDeclaration(ast, retArr, funcParam);
case 'FunctionExpression':
return this.astFunctionExpression(ast, retArr, funcParam);
case 'ReturnStatement':
return this.astReturnStatement(ast, retArr, funcParam);
case 'Literal':
return this.astLiteral(ast, retArr, funcParam);
case 'BinaryExpression':
return this.astBinaryExpression(ast, retArr, funcParam);
case 'Identifier':
return this.astIdentifierExpression(ast, retArr, funcParam);
case 'AssignmentExpression':
return this.astAssignmentExpression(ast, retArr, funcParam);
case 'ExpressionStatement':
return this.astExpressionStatement(ast, retArr, funcParam);
case 'EmptyStatement':
return this.astEmptyStatement(ast, retArr, funcParam);
case 'BlockStatement':
return this.astBlockStatement(ast, retArr, funcParam);
case 'IfStatement':
return this.astIfStatement(ast, retArr, funcParam);
case 'BreakStatement':
return this.astBreakStatement(ast, retArr, funcParam);
case 'ContinueStatement':
return this.astContinueStatement(ast, retArr, funcParam);
case 'ForStatement':
return this.astForStatement(ast, retArr, funcParam);
case 'WhileStatement':
return this.astWhileStatement(ast, retArr, funcParam);
case 'VariableDeclaration':
return this.astVariableDeclaration(ast, retArr, funcParam);
case 'VariableDeclarator':
return this.astVariableDeclarator(ast, retArr, funcParam);
case 'ThisExpression':
return this.astThisExpression(ast, retArr, funcParam);
case 'SequenceExpression':
return this.astSequenceExpression(ast, retArr, funcParam);
case 'UnaryExpression':
return this.astUnaryExpression(ast, retArr, funcParam);
case 'UpdateExpression':
return this.astUpdateExpression(ast, retArr, funcParam);
case 'LogicalExpression':
return this.astLogicalExpression(ast, retArr, funcParam);
case 'MemberExpression':
return this.astMemberExpression(ast, retArr, funcParam);
case 'CallExpression':
return this.astCallExpression(ast, retArr, funcParam);
case 'ArrayExpression':
return this.astArrayExpression(ast, retArr, funcParam);
}
throw astErrorOutput('Unknown ast type : ' + ast.type, ast, funcParam);
}
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astFunctionDeclaration
*
* @desc Parses the abstract syntax tree for to its *named function declaration*
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astFunctionDeclaration(ast, retArr, funcParam) {
if (this.addFunction) {
this.addFunction(null, utils.getAstString(this.jsFunctionString, ast));
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astFunctionPrototype
* @static
*
* @desc Parses the abstract syntax tree for to its *named function prototype*
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
static astFunctionPrototype(ast, retArr, funcParam) {
// Setup function return type and name
if (funcParam.isRootKernel || funcParam.isSubKernel) {
return retArr;
}
retArr.push(funcParam.returnType);
retArr.push(' ');
retArr.push(funcParam.functionName);
retArr.push('(');
// Arguments handling
for (let i = 0; i < funcParam.paramNames.length; ++i) {
if (i > 0) {
retArr.push(', ');
}
retArr.push(funcParam.paramTypes[i]);
retArr.push(' ');
retArr.push('user_');
retArr.push(funcParam.paramNames[i]);
}
retArr.push(');\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astFunctionExpression
*
* @desc Parses the abstract syntax tree for to its *named function*
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astFunctionExpression(ast, retArr, funcParam) {
// Setup function return type and name
if (funcParam.isRootKernel) {
retArr.push('void');
funcParam.kernalAst = ast;
} else {
retArr.push(funcParam.returnType);
}
retArr.push(' ');
retArr.push(funcParam.functionName);
retArr.push('(');
if (!funcParam.isRootKernel) {
// Arguments handling
for (let i = 0; i < funcParam.paramNames.length; ++i) {
const paramName = funcParam.paramNames[i];
if (i > 0) {
retArr.push(', ');
}
const type = funcParam.getParamType(paramName);
switch (type) {
case 'Texture':
case 'Array':
retArr.push('sampler2D');
break;
default:
retArr.push('float');
}
retArr.push(' ');
retArr.push('user_');
retArr.push(paramName);
}
}
// Function opening
retArr.push(') {\n');
// Body statement iteration
for (let i = 0; i < ast.body.body.length; ++i) {
this.astGeneric(ast.body.body[i], retArr, funcParam);
retArr.push('\n');
}
// Function closing
retArr.push('}\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astReturnStatement
*
* @desc Parses the abstract syntax tree for to *return* statement
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Object} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astReturnStatement(ast, retArr, funcParam) {
if (funcParam.isRootKernel) {
retArr.push('kernelResult = ');
this.astGeneric(ast.argument, retArr, funcParam);
retArr.push(';');
retArr.push('return;');
} else if (funcParam.isSubKernel) {
retArr.push(`${ funcParam.functionName }Result = `);
this.astGeneric(ast.argument, retArr, funcParam);
retArr.push(';');
retArr.push(`return ${ funcParam.functionName }Result;`);
} else {
retArr.push('return ');
this.astGeneric(ast.argument, retArr, funcParam);
retArr.push(';');
}
//throw astErrorOutput(
// 'Non main function return, is not supported : '+funcParam.currentFunctionNamespace,
// ast, funcParam
//);
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astLiteral
*
* @desc Parses the abstract syntax tree for *literal value*
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astLiteral(ast, retArr, funcParam) {
// Reject non numeric literals
if (isNaN(ast.value)) {
throw astErrorOutput(
'Non-numeric literal not supported : ' + ast.value,
ast, funcParam
);
}
// Push the literal value as a float/int
retArr.push(ast.value);
// If it was an int, node made a float
if (Number.isInteger(ast.value)) {
retArr.push('.0');
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astBinaryExpression
*
* @desc Parses the abstract syntax tree for *binary* expression
*
* @param {Object} ast - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astBinaryExpression(ast, retArr, funcParam) {
retArr.push('(');
if (ast.operator === '%') {
retArr.push('mod(');
this.astGeneric(ast.left, retArr, funcParam);
retArr.push(',');
this.astGeneric(ast.right, retArr, funcParam);
retArr.push(')');
} else if (ast.operator === '===') {
this.astGeneric(ast.left, retArr, funcParam);
retArr.push('==');
this.astGeneric(ast.right, retArr, funcParam);
} else if (ast.operator === '!==') {
this.astGeneric(ast.left, retArr, funcParam);
retArr.push('!=');
this.astGeneric(ast.right, retArr, funcParam);
} else {
this.astGeneric(ast.left, retArr, funcParam);
retArr.push(ast.operator);
this.astGeneric(ast.right, retArr, funcParam);
}
retArr.push(')');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astIdentifierExpression
*
* @desc Parses the abstract syntax tree for *identifier* expression
*
* @param {Object} idtNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astIdentifierExpression(idtNode, retArr, funcParam) {
if (idtNode.type !== 'Identifier') {
throw astErrorOutput(
'IdentifierExpression - not an Identifier',
ast, funcParam
);
}
switch (idtNode.name) {
case 'gpu_threadX':
retArr.push('threadId.x');
break;
case 'gpu_threadY':
retArr.push('threadId.y');
break;
case 'gpu_threadZ':
retArr.push('threadId.z');
break;
case 'gpu_dimensionsX':
retArr.push('uOutputDim.x');
break;
case 'gpu_dimensionsY':
retArr.push('uOutputDim.y');
break;
case 'gpu_dimensionsZ':
retArr.push('uOutputDim.z');
break;
default:
if (this.constants && this.constants.hasOwnProperty(idtNode.name)) {
retArr.push('constants_' + idtNode.name);
} else {
const userParamName = funcParam.getUserParamName(idtNode.name);
if (userParamName !== null) {
retArr.push('user_' + userParamName);
} else {
retArr.push('user_' + idtNode.name);
}
}
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astForStatement
*
* @desc Parses the abstract syntax tree forfor *for-loop* expression
*
* @param {Object} forNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {String} the prased openclgl string
*/
astForStatement(forNode, retArr, funcParam) {
if (forNode.type !== 'ForStatement') {
throw astErrorOutput(
'Invalid for statment',
ast, funcParam
);
}
if (forNode.test && forNode.test.type === 'BinaryExpression') {
if (forNode.test.right.type === 'Identifier' &&
forNode.test.operator === '<' &&
this.isIdentifierConstant(forNode.test.right.name) === false) {
if (this.opt.loopMaxIterations === undefined) {
console.warn('Warning: loopMaxIterations is not set! Using default of 100 which may result in unintended behavior.');
console.warn('Set loopMaxIterations or use a for loop of fixed length to silence this message.');
}
retArr.push('for (float ');
this.astGeneric(forNode.init, retArr, funcParam);
retArr.push(';');
this.astGeneric(forNode.test.left, retArr, funcParam);
retArr.push(forNode.test.operator);
retArr.push('LOOP_MAX');
retArr.push(';');
this.astGeneric(forNode.update, retArr, funcParam);
retArr.push(')');
retArr.push('{\n');
retArr.push('if (');
this.astGeneric(forNode.test.left, retArr, funcParam);
retArr.push(forNode.test.operator);
this.astGeneric(forNode.test.right, retArr, funcParam);
retArr.push(') {\n');
if (forNode.body.type === 'BlockStatement') {
for (let i = 0; i < forNode.body.body.length; i++) {
this.astGeneric(forNode.body.body[i], retArr, funcParam);
}
} else {
this.astGeneric(forNode.body, retArr, funcParam);
}
retArr.push('} else {\n');
retArr.push('break;\n');
retArr.push('}\n');
retArr.push('}\n');
return retArr;
} else {
const declarations = JSON.parse(JSON.stringify(forNode.init.declarations));
const updateArgument = forNode.update.argument;
if (!Array.isArray(declarations) || declarations.length < 1) {
console.log(this.jsFunctionString);
throw new Error('Error: Incompatible for loop declaration');
}
if (declarations.length > 1) {
let initArgument = null;
for (let i = 0; i < declarations.length; i++) {
const declaration = declarations[i];
if (declaration.id.name === updateArgument.name) {
initArgument = declaration;
declarations.splice(i, 1);
} else {
retArr.push('float ');
this.astGeneric(declaration, retArr, funcParam);
retArr.push(';');
}
}
retArr.push('for (float ');
this.astGeneric(initArgument, retArr, funcParam);
retArr.push(';');
} else {
retArr.push('for (');
this.astGeneric(forNode.init, retArr, funcParam);
}
this.astGeneric(forNode.test, retArr, funcParam);
retArr.push(';');
this.astGeneric(forNode.update, retArr, funcParam);
retArr.push(')');
this.astGeneric(forNode.body, retArr, funcParam);
return retArr;
}
}
throw astErrorOutput(
'Invalid for statement',
ast, funcParam
);
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astWhileStatement
*
* @desc Parses the abstract syntax tree for *while* loop
*
*
* @param {Object} whileNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {String} the parsed openclgl string
*/
astWhileStatement(whileNode, retArr, funcParam) {
if (whileNode.type !== 'WhileStatement') {
throw astErrorOutput(
'Invalid while statment',
ast, funcParam
);
}
retArr.push('for (float i = 0.0; i < LOOP_MAX; i++) {');
retArr.push('if (');
this.astGeneric(whileNode.test, retArr, funcParam);
retArr.push(') {\n');
this.astGeneric(whileNode.body, retArr, funcParam);
retArr.push('} else {\n');
retArr.push('break;\n');
retArr.push('}\n');
retArr.push('}\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astAssignmentExpression
*
* @desc Parses the abstract syntax tree for *Assignment* Expression
*
* @param {Object} assNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astAssignmentExpression(assNode, retArr, funcParam) {
if (assNode.operator === '%=') {
this.astGeneric(assNode.left, retArr, funcParam);
retArr.push('=');
retArr.push('mod(');
this.astGeneric(assNode.left, retArr, funcParam);
retArr.push(',');
this.astGeneric(assNode.right, retArr, funcParam);
retArr.push(')');
} else {
this.astGeneric(assNode.left, retArr, funcParam);
retArr.push(assNode.operator);
this.astGeneric(assNode.right, retArr, funcParam);
return retArr;
}
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astEmptyStatement
*
* @desc Parses the abstract syntax tree for an *Empty* Statement
*
* @param {Object} eNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astEmptyStatement(eNode, retArr, funcParam) {
//retArr.push(';\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astBlockStatement
*
* @desc Parses the abstract syntax tree for *Block* statement
*
* @param {Object} bnode - the AST object to parse
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astBlockStatement(bNode, retArr, funcParam) {
retArr.push('{\n');
for (let i = 0; i < bNode.body.length; i++) {
this.astGeneric(bNode.body[i], retArr, funcParam);
}
retArr.push('}\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astExpressionStatement
*
* @desc Parses the abstract syntax tree for *generic expression* statement
*
* @param {Object} esNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astExpressionStatement(esNode, retArr, funcParam) {
this.astGeneric(esNode.expression, retArr, funcParam);
retArr.push(';\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astVariableDeclaration
*
* @desc Parses the abstract syntax tree for *Variable Declaration*
*
* @param {Object} vardecNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astVariableDeclaration(vardecNode, retArr, funcParam) {
retArr.push('float ');
for (let i = 0; i < vardecNode.declarations.length; i++) {
if (i > 0) {
retArr.push(',');
}
this.astGeneric(vardecNode.declarations[i], retArr, funcParam);
}
retArr.push(';');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astVariableDeclarator
*
* @desc Parses the abstract syntax tree for *Variable Declarator*
*
* @param {Object} ivardecNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astVariableDeclarator(ivardecNode, retArr, funcParam) {
this.astGeneric(ivardecNode.id, retArr, funcParam);
if (ivardecNode.init !== null) {
retArr.push('=');
this.astGeneric(ivardecNode.init, retArr, funcParam);
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astIfStatement
*
* @desc Parses the abstract syntax tree for *If* Statement
*
* @param {Object} ifNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astIfStatement(ifNode, retArr, funcParam) {
retArr.push('if (');
this.astGeneric(ifNode.test, retArr, funcParam);
retArr.push(')');
if (ifNode.consequent.type === 'BlockStatement') {
this.astGeneric(ifNode.consequent, retArr, funcParam);
} else {
retArr.push(' {\n');
this.astGeneric(ifNode.consequent, retArr, funcParam);
retArr.push('\n}\n');
}
if (ifNode.alternate) {
retArr.push('else ');
if (ifNode.alternate.type === 'BlockStatement') {
this.astGeneric(ifNode.alternate, retArr, funcParam);
} else {
retArr.push(' {\n');
this.astGeneric(ifNode.alternate, retArr, funcParam);
retArr.push('\n}\n');
}
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astBreakStatement
*
* @desc Parses the abstract syntax tree for *Break* Statement
*
* @param {Object} brNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astBreakStatement(brNode, retArr, funcParam) {
retArr.push('break;\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astContinueStatement
*
* @desc Parses the abstract syntax tree for *Continue* Statement
*
* @param {Object} crNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astContinueStatement(crNode, retArr, funcParam) {
retArr.push('continue;\n');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astLogicalExpression
*
* @desc Parses the abstract syntax tree for *Logical* Expression
*
* @param {Object} logNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astLogicalExpression(logNode, retArr, funcParam) {
retArr.push('(');
this.astGeneric(logNode.left, retArr, funcParam);
retArr.push(logNode.operator);
this.astGeneric(logNode.right, retArr, funcParam);
retArr.push(')');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astUpdateExpression
*
* @desc Parses the abstract syntax tree for *Update* Expression
*
* @param {Object} uNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astUpdateExpression(uNode, retArr, funcParam) {
if (uNode.prefix) {
retArr.push(uNode.operator);
this.astGeneric(uNode.argument, retArr, funcParam);
} else {
this.astGeneric(uNode.argument, retArr, funcParam);
retArr.push(uNode.operator);
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astUnaryExpression
*
* @desc Parses the abstract syntax tree for *Unary* Expression
*
* @param {Object} uNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astUnaryExpression(uNode, retArr, funcParam) {
if (uNode.prefix) {
retArr.push(uNode.operator);
this.astGeneric(uNode.argument, retArr, funcParam);
} else {
this.astGeneric(uNode.argument, retArr, funcParam);
retArr.push(uNode.operator);
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astThisExpression
*
* @desc Parses the abstract syntax tree for *This* expression
*
* @param {Object} tNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astThisExpression(tNode, retArr, funcParam) {
retArr.push('this');
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astMemberExpression
*
* @desc Parses the abstract syntax tree for *Member* Expression
*
* @param {Object} mNode - An ast Node
* @param {Array} retArr - return array string
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {Array} the append retArr
*/
astMemberExpression(mNode, retArr, funcParam) {
if (mNode.computed) {
if (mNode.object.type === 'Identifier') {
// Working logger
const reqName = mNode.object.name;
const funcName = funcParam.functionName || 'kernel';
let assumeNotTexture = false;
// Possibly an array request - handle it as such
if (funcParam.paramNames) {
const idx = funcParam.paramNames.indexOf(reqName);
if (idx >= 0 && funcParam.paramTypes[idx] === 'float') {
assumeNotTexture = true;
}
}
if (assumeNotTexture) {
// Get from array
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('[int(');
this.astGeneric(mNode.property, retArr, funcParam);
retArr.push(')]');
} else {
// Get from texture
// This normally refers to the global read only input vars
retArr.push('get(');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push(', vec2(');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('Size[0],');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('Size[1]), vec3(');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('Dim[0],');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('Dim[1],');
this.astGeneric(mNode.object, retArr, funcParam);
retArr.push('Dim[2]');
retArr.push('), ');
this.astGeneric(mNode.property, retArr, funcParam);
retArr.push(')');
}
} else {
this.astGeneric(mNode.object, retArr, funcParam);
const last = retArr.pop();
retArr.push(',');
this.astGeneric(mNode.property, retArr, funcParam);
retArr.push(last);
}
} else {
// Unroll the member expression
let unrolled = this.astMemberExpressionUnroll(mNode);
let unrolled_lc = unrolled.toLowerCase();
// Its a constant, remove this.constants.
if (unrolled.indexOf(constantsPrefix) === 0) {
unrolled = 'constants_' + unrolled.slice(constantsPrefix.length);
}
if (unrolled_lc === 'this.thread.x') {
retArr.push('threadId.x');
} else if (unrolled_lc === 'this.thread.y') {
retArr.push('threadId.y');
} else if (unrolled_lc === 'this.thread.z') {
retArr.push('threadId.z');
} else if (unrolled_lc === 'this.dimensions.x') {
retArr.push('uOutputDim.x');
} else if (unrolled_lc === 'this.dimensions.y') {
retArr.push('uOutputDim.y');
} else if (unrolled_lc === 'this.dimensions.z') {
retArr.push('uOutputDim.z');
} else {
retArr.push(unrolled);
}
}
return retArr;
}
astSequenceExpression(sNode, retArr, funcParam) {
for (let i = 0; i < sNode.expressions.length; i++) {
if (i > 0) {
retArr.push(',');
}
this.astGeneric(sNode.expressions, retArr, funcParam);
}
return retArr;
}
/**
* @memberOf WebGLFunctionNode#
* @function
* @name astMemberExpressionUnroll
* @desc Parses the abstract syntax tree for binary expression.
*
* <p>Utility function for astCallExpression.</p>
*
* @param {Object} ast - the AST object to parse
* @param {Function} funcParam - FunctionNode, that tracks compilation state
*
* @returns {String} the function namespace call, unrolled
*/
astMemberExpressionUnroll(ast, funcParam) {
if (ast.type === 'Identifier') {
return ast.name;
} else if (ast.type === 'ThisExpression') {
return 'this';
}
if (ast.type === 'MemberExpression') {
if (ast.object && ast.property) {
return (
this.astMemberExpressionUnroll(ast.object, funcParam) +
'.' +
this.astMemberExpressionUnroll(ast.property, funcParam)
);
}
}
// Failure, unknown expression
throw astErrorOutput(
'Unknown CallExpression_unroll',
ast, funcParam
);