GLSL manipulator

GLSL parser and code generator based on Google's glsl-unit grammar.

Install

npm install glsl-man

Usage

Parsing

var glsl = require('glsl-man');
var ast = glsl.parse(source);

Deparsing

var glsl = require('glsl-man');
var ast = glsl.parse(source);
var generated = glsl.string(ast);

Querying

var glsl = require('glsl-man');
var ast = glsl.parse(source);
var uniforms = glsl.query.all(
	ast,
	glsl.query.selector('declarator[typeAttribute] > type[qualifier=uniform]'));

API

Parsing

• glsl.parse(string) - Generates AST from GLSL
  • string - GLSL source code

Deparsing

• glsl.string(ASTNode, options) - Generates GLSL from AST
  • ASTNode - Any node from the tree returned by parse(string)
  • options - The default options are described below:

	{
		tab: '\t',       // Character used for tab
		space: ' ',      // Character used for space
		newline: '\n',   // Character used for newlines

		// The following should not be altered to produce valid GLSL
		terminator: ';', // Character used to terminate a statement
		comma: ','       // Character used for comma
	}

• glsl.wrap(ASTNode) - Wraps the given node in a 'root' scope. Useful for generating valid code from arbitrary AST subnodes.
  • ASTNode - Any node from the tree returned by parse(string)

Querying

• glsl.query.selector(string) - Returns a selector

  • string - cssauron selector

• glsl.query.all(node, selector, matches) - Searches the tree depth first and returns all nodes that match the selector

  • node - AST node
  • selector - The selector to test against
  • matches - Array to store matched nodes (optional)

• glsl.query.first(node, selector) - Searches the tree depth first and returns the first node that matches the selector

  • node - AST node
  • selector - The selector to test against

• glsl.query.children(node, selector, matches) - Searches only the immediate subnodes of the given node and returns all children that match the selector

  • node - AST node
  • selector - The selector to test against
  • matches - Array to store matched nodes (optional)

• glsl.query.firstChild(node, selector) - Searches only the immediate subnodes of the given node and returns the first node that matches the selector

  • node - AST node
  • selector - The selector to test against

• glsl.query.subnodes(node) - Returns a list of all subnodes of the given node that can be further traversed

  • node - AST node

Modifying

• glsl.mod.find(node) - Returns an object with index and statements keys.

  • node - AST node

• glsl.mod.remove(node) - Removes the given node from it's AST.

  • node - AST node

• glsl.mod.replace(node, newNode) - Replaces the given node with newNode.

  • node - AST node
  • newNode - AST node or Array of AST nodes

• glsl.mod.add(node, newNode, after) - Inserts newNode before or after node.

  • node - AST node
  • newNode - AST node or Array of AST nodes
  • after - (optional) Boolean

• glsl.mod.addBefore(node, newNode) - Shortcut to glsl.mod.add.

• glsl.mod.addAfter(node, newNode) - Shortcut to glsl.mod.add.