240 lines
8.8 KiB
Dart
240 lines
8.8 KiB
Dart
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// tool/gen_bench_pdf.dart
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//
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// Generates a benchmark PDF at test/assets/large_300p.pdf using
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// package:syncfusion_flutter_pdf.
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//
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// syncfusion_flutter_pdf imports dart:ui which is only available inside the
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// Flutter SDK runtime, so this file CANNOT be run via plain `dart run`.
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//
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// USAGE:
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// flutter test tool/gen_bench_pdf.dart
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// flutter test tool/gen_bench_pdf.dart --dart-define=PAGE_COUNT=50
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//
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// The script is structured as a flutter_test file (one `test(...)` block) so
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// that `flutter test` invokes it with the full Flutter engine (dart:ui present).
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// It is NOT a real unit test — it is a code-generation tool that happens to
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// need the Flutter runtime. The test "passes" as long as the file is written
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// successfully.
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//
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// Each page contains:
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// - A bold title (page number heading)
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// - Two paragraphs of body text
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// - A ruled grid of lines (10x10)
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// - A filled rectangle and an outlined ellipse
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// This gives a realistic (non-blank) render load for pdfrx frame-timing tests.
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// ignore_for_file: avoid_print
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import 'dart:io';
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import 'dart:math';
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import 'dart:ui' show Offset, Rect, Size;
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import 'package:flutter_test/flutter_test.dart';
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import 'package:syncfusion_flutter_pdf/pdf.dart';
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void main() {
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// Read PAGE_COUNT from --dart-define (default 300).
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const int pageCount = int.fromEnvironment('PAGE_COUNT', defaultValue: 300);
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test('generate test/assets/large_300p.pdf ($pageCount pages)', () {
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final outputPath = _resolveOutputPath();
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final outFile = File(outputPath);
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outFile.parent.createSync(recursive: true);
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final pdf = PdfDocument();
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// Reusable fonts and brushes (created once, shared across pages).
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final titleFont = PdfStandardFont(PdfFontFamily.helvetica, 18,
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style: PdfFontStyle.bold);
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final bodyFont = PdfStandardFont(PdfFontFamily.helvetica, 10);
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final smallFont = PdfStandardFont(PdfFontFamily.helvetica, 8);
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final blackBrush = PdfSolidBrush(PdfColor(0, 0, 0));
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final darkBlueBrush = PdfSolidBrush(PdfColor(10, 30, 80));
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final lightGrayBrush = PdfSolidBrush(PdfColor(220, 220, 220));
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final accentBrush = PdfSolidBrush(PdfColor(60, 100, 200));
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final gridPen = PdfPen(PdfColor(180, 180, 180), width: 0.3);
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final borderPen = PdfPen(PdfColor(0, 0, 0), width: 1.0);
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final accentPen = PdfPen(PdfColor(60, 100, 200), width: 1.5);
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final rng = Random(42); // deterministic
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for (int i = 1; i <= pageCount; i++) {
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final page = pdf.pages.add();
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final g = page.graphics;
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final w = page.getClientSize().width;
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final h = page.getClientSize().height;
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// ── Title ──────────────────────────────────────────────────────────────
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g.drawString(
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'BadNote Benchmark — Page $i of $pageCount',
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titleFont,
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brush: darkBlueBrush,
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bounds: Rect.fromLTWH(36, 30, w - 72, 28),
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);
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// Horizontal rule under title
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g.drawLine(
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PdfPen(PdfColor(60, 100, 200), width: 1.0),
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Offset(36, 62),
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Offset(w - 36, 62),
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);
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// ── Body text (two paragraphs) ────────────────────────────────────────
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final paragraph1 =
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'This page is part of a synthetic $pageCount-page benchmark PDF '
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'generated by BadNote\'s tool/gen_bench_pdf.dart. Each page carries '
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'non-trivial content (text, vector shapes, a line grid) to simulate '
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'realistic rendering load for pdfrx frame-timing measurements. '
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'Page index: $i. Seed value: ${rng.nextInt(99999)}.';
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final paragraph2 =
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'Performance target (MUST #4, §10/M1): pdfrx fling-scroll over '
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'$pageCount pages in profile mode must stay at ≤ 16.6 ms median '
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'frame time (build + raster) and ≤ 22 ms at p95, measured over '
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'N ≥ 120 frames per §7.1 of the BadNote Phase 1 plan. If this gate '
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'fails the backend choice is invalidated. Fill: ${_lorem(rng, 60)}.';
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g.drawString(
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paragraph1,
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bodyFont,
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brush: blackBrush,
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bounds: Rect.fromLTWH(36, 72, w - 72, 80),
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format: PdfStringFormat(lineSpacing: 4),
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);
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g.drawString(
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paragraph2,
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bodyFont,
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brush: blackBrush,
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bounds: Rect.fromLTWH(36, 158, w - 72, 80),
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format: PdfStringFormat(lineSpacing: 4),
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);
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// ── 10×10 ruled grid ──────────────────────────────────────────────────
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const gridLeft = 36.0;
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const gridTop = 260.0;
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final gridWidth = w - 72;
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const gridHeight = 220.0;
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const cols = 10;
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const rows = 10;
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final cellW = gridWidth / cols;
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const cellH = gridHeight / rows;
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for (int col = 0; col <= cols; col++) {
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final x = gridLeft + col * cellW;
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g.drawLine(
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gridPen, Offset(x, gridTop), Offset(x, gridTop + gridHeight));
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}
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for (int row = 0; row <= rows; row++) {
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const y = gridTop;
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g.drawLine(gridPen, Offset(gridLeft, y + row * cellH),
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Offset(gridLeft + gridWidth, y + row * cellH));
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}
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for (int row = 0; row < rows; row++) {
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for (int col = 0; col < cols; col++) {
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if ((row + col) % 3 == 0) {
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g.drawRectangle(
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brush: lightGrayBrush,
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bounds: Rect.fromLTWH(
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gridLeft + col * cellW + 0.5,
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gridTop + row * cellH + 0.5,
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cellW - 1,
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cellH - 1,
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),
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);
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}
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}
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}
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g.drawRectangle(
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pen: borderPen,
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bounds: Rect.fromLTWH(gridLeft, gridTop, gridWidth, gridHeight),
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);
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for (int row = 0; row < rows; row++) {
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g.drawString(
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'R${row + 1}',
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smallFont,
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brush: blackBrush,
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bounds: Rect.fromLTWH(
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gridLeft + 2,
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gridTop + row * cellH + 2,
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cellW - 4,
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cellH - 4,
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),
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);
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}
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// ── Accent shapes ──────────────────────────────────────────────────────
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const shapeTop = gridTop + gridHeight + 18;
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final rectW = 60.0 + (i % 8) * 10.0;
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g.drawRectangle(
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pen: accentPen,
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brush: accentBrush,
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bounds: Rect.fromLTWH(36, shapeTop, rectW, 24),
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);
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g.drawString(
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'Page $i',
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smallFont,
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brush: PdfSolidBrush(PdfColor(255, 255, 255)),
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bounds: Rect.fromLTWH(40, shapeTop + 6, rectW - 8, 14),
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);
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g.drawEllipse(
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Rect.fromLTWH(36 + rectW + 16, shapeTop, 80, 24),
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pen: accentPen,
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);
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// ── Footer ────────────────────────────────────────────────────────────
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g.drawString(
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'BadNote bench PDF • page $i/$pageCount • tool/gen_bench_pdf.dart',
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smallFont,
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brush: PdfSolidBrush(PdfColor(140, 140, 140)),
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bounds: Rect.fromLTWH(36, h - 28, w - 72, 18),
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format: PdfStringFormat(alignment: PdfTextAlignment.center),
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);
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}
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final bytes = pdf.saveSync();
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pdf.dispose();
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outFile.writeAsBytesSync(bytes);
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final sizeKb = (outFile.lengthSync() / 1024).toStringAsFixed(1);
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print('Generated: $outputPath');
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print('Pages: $pageCount');
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print('Size: ${sizeKb} KB (${outFile.lengthSync()} bytes)');
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expect(outFile.existsSync(), isTrue);
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expect(outFile.lengthSync(), greaterThan(1024),
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reason: 'PDF must be at least 1 KB');
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}, timeout: const Timeout(Duration(minutes: 5)));
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}
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/// Resolves test/assets/large_300p.pdf relative to this script's location.
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/// tool/gen_bench_pdf.dart → project root → test/assets/large_300p.pdf
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String _resolveOutputPath() {
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// When run via `flutter test`, the CWD is the project root.
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return 'test/assets/large_300p.pdf';
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}
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/// Generates a deterministic Lorem-Ipsum-style filler of roughly [words] words.
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String _lorem(Random rng, int words) {
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const vocab = [
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'lorem', 'ipsum', 'dolor', 'sit', 'amet', 'consectetur',
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'adipiscing', 'elit', 'sed', 'eiusmod', 'tempor', 'incididunt',
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'labore', 'dolore', 'magna', 'aliqua', 'enim', 'minim', 'veniam',
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'quis', 'nostrud', 'exercitation', 'ullamco', 'laboris', 'nisi',
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'aliquip', 'commodo', 'consequat', 'duis', 'aute', 'irure',
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'reprehenderit', 'voluptate', 'velit', 'esse', 'cillum', 'fugiat',
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'nulla', 'pariatur', 'excepteur', 'sint', 'occaecat', 'cupidatat',
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'proident', 'culpa', 'officia', 'deserunt', 'mollit', 'anim',
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];
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return List.generate(words, (_) => vocab[rng.nextInt(vocab.length)])
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.join(' ');
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}
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