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Adding type4 postscript function support.
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Brendan Dahl
parent
f7f7269253
commit
1089c30b56
3 changed files with 751 additions and 6 deletions
223
test/unit/function_spec.js
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223
test/unit/function_spec.js
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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'use strict';
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describe('function', function() {
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beforeEach(function () {
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this.addMatchers({
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toMatchArray: function(expected) {
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var actual = this.actual;
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if (actual.length != expected.length)
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return false;
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for (var i = 0; i < expected.length; i++) {
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var a = actual[i], b = expected[i];
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if (isArray(b)) {
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if (a.length != b.length)
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return false;
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for (var j = 0; j < a.length; j++) {
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var suba = a[j], subb = b[j];
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if (suba !== subb)
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return false
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}
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} else {
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if (a !== b)
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return false;
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}
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}
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return true;
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}
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});
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});
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describe('PostScriptParser', function() {
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function parse(program) {
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var stream = new StringStream(program);
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var parser = new PostScriptParser(new PostScriptLexer(stream));
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return parser.parse();
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}
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it('parses empty programs', function() {
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var output = parse('{}');
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expect(output.length).toEqual(0);
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});
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it('parses positive numbers', function() {
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var number = 999;
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var program = parse('{ ' + number + ' }');
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var expectedProgram = [
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['push', number]
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('parses negative numbers', function() {
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var number = -999;
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var program = parse('{ ' + number + ' }');
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var expectedProgram = [
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['push', number]
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('parses negative floats', function() {
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var number = 3.3;
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var program = parse('{ ' + number + ' }');
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var expectedProgram = [
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['push', number]
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('parses operators', function() {
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var program = parse('{ sub }');
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var expectedProgram = [
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['sub']
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('parses if statements', function() {
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var program = parse('{ { 99 } if }');
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var expectedProgram = [
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['jz', 2],
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['push', 99]
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('parses ifelse statements', function() {
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var program = parse('{ { 99 } { 44 } ifelse }');
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var expectedProgram = [
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['jz', 3],
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['push', 99],
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['j', 4],
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['push', 44],
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];
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expect(program).toMatchArray(expectedProgram);
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});
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it('handles missing brackets', function() {
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expect(function() { parse('{'); }).toThrow(
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new Error('Unexpected symbol: found undefined expected 1.'));
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});
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});
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describe('PostScriptEvaluator', function() {
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function evaluate(program) {
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var stream = new StringStream(program);
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var parser = new PostScriptParser(new PostScriptLexer(stream));
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var code = parser.parse();
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var evaluator = new PostScriptEvaluator(code);
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var output = evaluator.execute();
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console.log(output);
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return output;
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}
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it('pushes stack', function() {
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var stack = evaluate('{ 99 }');
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var expectedStack = [99];
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expect(stack).toMatchArray(expectedStack);
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});
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it('handles if with true', function() {
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var stack = evaluate('{ 1 {99} if }');
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var expectedStack = [99];
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expect(stack).toMatchArray(expectedStack);
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});
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it('handles if with false', function() {
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var stack = evaluate('{ 0 {99} if }');
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var expectedStack = [];
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expect(stack).toMatchArray(expectedStack);
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});
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it('handles ifelse with true', function() {
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var stack = evaluate('{ 1 {99} {77} ifelse }');
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var expectedStack = [99];
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expect(stack).toMatchArray(expectedStack);
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});
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it('handles ifelse with false', function() {
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var stack = evaluate('{ 0 {99} {77} ifelse }');
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var expectedStack = [77];
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expect(stack).toMatchArray(expectedStack);
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});
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it('handles nested if', function() {
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var stack = evaluate('{ 1 {1 {77} if} if }');
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var expectedStack = [77];
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expect(stack).toMatchArray(expectedStack);
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});
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it('abs', function() {
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var stack = evaluate('{ -2 abs }');
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var expectedStack = [2];
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expect(stack).toMatchArray(expectedStack);
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});
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it('adds', function() {
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var stack = evaluate('{ 1 2 add }');
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var expectedStack = [3];
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expect(stack).toMatchArray(expectedStack);
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});
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it('boolean ands', function() {
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var stack = evaluate('{ true false and }');
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var expectedStack = [false];
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expect(stack).toMatchArray(expectedStack);
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});
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it('bitwise ands', function() {
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var stack = evaluate('{ 254 1 and }');
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var expectedStack = [254 & 1];
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expect(stack).toMatchArray(expectedStack);
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});
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// TODO atan
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// TODO bitshift
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// TODO ceiling
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// TODO copy
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// TODO cos
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// TODO cvi
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// TODO cvr
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// TODO div
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it('duplicates', function() {
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var stack = evaluate('{ 99 dup }');
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var expectedStack = [99, 99];
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expect(stack).toMatchArray(expectedStack);
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});
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// TODO eq
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it('exchanges', function() {
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var stack = evaluate('{ 44 99 exch }');
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var expectedStack = [99, 44];
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expect(stack).toMatchArray(expectedStack);
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});
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// TODO exp
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// TODO false
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// TODO floor
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// TODO ge
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// TODO gt
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// TODO idiv
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it('duplicates index', function() {
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var stack = evaluate('{ 4 3 2 1 2 index }');
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var expectedStack = [4, 3, 2, 1, 3];
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expect(stack).toMatchArray(expectedStack);
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});
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// TODO le
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// TODO ln
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// TODO log
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// TODO lt
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// TODO mod
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// TODO mul
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// TODO ne
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// TODO neg
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// TODO not
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// TODO or
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it('pops stack', function() {
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var stack = evaluate('{ 1 2 pop }');
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var expectedStack = [1];
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expect(stack).toMatchArray(expectedStack);
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});
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it('rolls stack right', function() {
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var stack = evaluate('{ 1 3 2 2 4 1 roll }');
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var expectedStack = [2, 1, 3, 2];
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expect(stack).toMatchArray(expectedStack);
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});
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it('rolls stack left', function() {
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var stack = evaluate('{ 1 3 2 2 4 -1 roll }');
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var expectedStack = [3, 2, 2, 1];
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expect(stack).toMatchArray(expectedStack);
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});
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// TODO round
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// TODO sin
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// TODO sqrt
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// TODO sub
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// TODO true
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// TODO truncate
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// TODO xor
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});
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});
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@ -11,9 +11,28 @@
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<!-- include spec files here... -->
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<script type="text/javascript" src="obj_spec.js"></script>
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<script type="text/javascript" src="function_spec.js"></script>
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<!-- include source files here... -->
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<script type="text/javascript" src="../../src/core.js"></script>
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<script type="text/javascript" src="../../src/util.js"></script>
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<script type="text/javascript" src="../../src/canvas.js"></script>
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<script type="text/javascript" src="../../src/obj.js"></script>
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<script type="text/javascript" src="../../src/function.js"></script>
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<script type="text/javascript" src="../../src/charsets.js"></script>
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<script type="text/javascript" src="../../src/cidmaps.js"></script>
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<script type="text/javascript" src="../../src/colorspace.js"></script>
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<script type="text/javascript" src="../../src/crypto.js"></script>
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<script type="text/javascript" src="../../src/evaluator.js"></script>
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<script type="text/javascript" src="../../src/fonts.js"></script>
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<script type="text/javascript" src="../../src/glyphlist.js"></script>
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<script type="text/javascript" src="../../src/image.js"></script>
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<script type="text/javascript" src="../../src/metrics.js"></script>
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<script type="text/javascript" src="../../src/parser.js"></script>
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<script type="text/javascript" src="../../src/pattern.js"></script>
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<script type="text/javascript" src="../../src/stream.js"></script>
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<script type="text/javascript" src="../../src/worker.js"></script>
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<script type="text/javascript" src="../../external/jpgjs/jpg.js"></script>
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<script type="text/javascript">
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'use strict';
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