From 74441c91ccc7fa197c95628618551dd572bf3fad Mon Sep 17 00:00:00 2001
From: Manuel Friedli <manuel@fritteli.ch>
Date: Sat, 3 Oct 2020 22:33:58 +0200
Subject: [PATCH] Render PDFs in dynamic size
---
src/main/java/ch/fritteli/labyrinth/Main.java | 4 +-
.../ch/fritteli/labyrinth/PDFRenderer.java | 40 +++++++++++--------
2 files changed, 26 insertions(+), 18 deletions(-)
diff --git a/src/main/java/ch/fritteli/labyrinth/Main.java b/src/main/java/ch/fritteli/labyrinth/Main.java
index e760bb7..1f7c050 100644
--- a/src/main/java/ch/fritteli/labyrinth/Main.java
+++ b/src/main/java/ch/fritteli/labyrinth/Main.java
@@ -7,8 +7,8 @@ import java.nio.file.Paths;
public class Main {
public static void main(@NonNull final String[] args) {
- int width = 20;
- int height = 20;
+ int width = 50;
+ int height = 50;
final Labyrinth labyrinth = new Labyrinth(width, height);
final TextRenderer textRenderer = TextRenderer.newInstance();
final HTMLRenderer htmlRenderer = HTMLRenderer.newInstance();
diff --git a/src/main/java/ch/fritteli/labyrinth/PDFRenderer.java b/src/main/java/ch/fritteli/labyrinth/PDFRenderer.java
index abce7a9..5dad450 100644
--- a/src/main/java/ch/fritteli/labyrinth/PDFRenderer.java
+++ b/src/main/java/ch/fritteli/labyrinth/PDFRenderer.java
@@ -4,6 +4,7 @@ import lombok.NonNull;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.common.PDRectangle;
import java.awt.*;
import java.io.ByteArrayOutputStream;
@@ -22,17 +23,20 @@ public class PDFRenderer implements Renderer<byte[]> {
@Override
@NonNull
public byte[] render(@NonNull final Labyrinth labyrinth) {
+ final float scale = 10;
+ final float margin = 5;
+ final float pageWidth = labyrinth.getWidth() * scale + 2 * margin;
+ final float pageHeight = labyrinth.getHeight() * scale + 2 * margin;
+
final PDDocument pdDocument = new PDDocument();
- final PDPage page = new PDPage();
+ final PDPage page = new PDPage(new PDRectangle(pageWidth, pageHeight));
pdDocument.addPage(page);
try (PDPageContentStream pdPageContentStream = new PDPageContentStream(pdDocument, page)) {
- pdPageContentStream.setLineCapStyle(BasicStroke.CAP_BUTT);
+ pdPageContentStream.setLineCapStyle(BasicStroke.CAP_ROUND);
pdPageContentStream.setLineJoinStyle(BasicStroke.JOIN_MITER);
pdPageContentStream.setLineWidth(1.0f);
pdPageContentStream.setStrokingColor(Color.BLACK);
pdPageContentStream.setNonStrokingColor(Color.BLACK);
- final float scale = 10;
- final float margin = 5;
this.drawHorizonzalLines(labyrinth, pdPageContentStream, margin, scale);
this.drawVerticalLines(labyrinth, pdPageContentStream, margin, scale);
} catch (IOException e) {
@@ -49,25 +53,27 @@ public class PDFRenderer implements Renderer<byte[]> {
}
private void drawHorizonzalLines(@NonNull final Labyrinth labyrinth, @NonNull final PDPageContentStream pdPageContentStream, final float margin, final float scale) throws IOException {
+ // PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
+ final float labyrinthHeight = labyrinth.getHeight() * scale;
for (int y = 0; y < labyrinth.getHeight(); y++) {
boolean isPainting = false;
for (int x = 0; x < labyrinth.getWidth(); x++) {
final Tile currentTile = labyrinth.getTileAt(x, y);
if (currentTile.hasWallAt(Direction.TOP)) {
if (!isPainting) {
- pdPageContentStream.moveTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.moveTo(x * scale + margin, labyrinthHeight - y * scale + margin);
isPainting = true;
}
} else {
if (isPainting) {
- pdPageContentStream.lineTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.lineTo(x * scale + margin, labyrinthHeight - y * scale + margin);
pdPageContentStream.stroke();
isPainting = false;
}
}
}
if (isPainting) {
- pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, y * scale + margin);
+ pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, labyrinthHeight - y * scale + margin);
pdPageContentStream.stroke();
}
}
@@ -77,43 +83,45 @@ public class PDFRenderer implements Renderer<byte[]> {
final Tile currentTile = labyrinth.getTileAt(x, y - 1);
if (currentTile.hasWallAt(Direction.BOTTOM)) {
if (!isPainting) {
- pdPageContentStream.moveTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.moveTo(x * scale + margin, labyrinthHeight - y * scale + margin);
isPainting = true;
}
} else {
if (isPainting) {
- pdPageContentStream.lineTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.lineTo(x * scale + margin, labyrinthHeight - y * scale + margin);
pdPageContentStream.stroke();
isPainting = false;
}
}
}
if (isPainting) {
- pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, labyrinth.getHeight() * scale + margin);
+ pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, labyrinthHeight - labyrinth.getHeight() * scale + margin);
pdPageContentStream.stroke();
}
}
private void drawVerticalLines(@NonNull final Labyrinth labyrinth, @NonNull final PDPageContentStream pdPageContentStream, final float margin, final float scale) throws IOException {
+ // PDF has the origin in the lower left corner. We want it in the upper left corner, hence some magic is required.
+ final float labyrinthHeight = labyrinth.getHeight() * scale;
for (int x = 0; x < labyrinth.getWidth(); x++) {
boolean isPainting = false;
for (int y = 0; y < labyrinth.getHeight(); y++) {
final Tile currentTile = labyrinth.getTileAt(x, y);
if (currentTile.hasWallAt(Direction.LEFT)) {
if (!isPainting) {
- pdPageContentStream.moveTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.moveTo(x * scale + margin, labyrinthHeight - y * scale + margin);
isPainting = true;
}
} else {
if (isPainting) {
- pdPageContentStream.lineTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.lineTo(x * scale + margin, labyrinthHeight - y * scale + margin);
pdPageContentStream.stroke();
isPainting = false;
}
}
}
if (isPainting) {
- pdPageContentStream.lineTo(x * scale + margin, labyrinth.getHeight() * scale + margin);
+ pdPageContentStream.lineTo(x * scale + margin, labyrinthHeight - labyrinth.getHeight() * scale + margin);
pdPageContentStream.stroke();
}
}
@@ -123,19 +131,19 @@ public class PDFRenderer implements Renderer<byte[]> {
final Tile currentTile = labyrinth.getTileAt(x - 1, y);
if (currentTile.hasWallAt(Direction.RIGHT)) {
if (!isPainting) {
- pdPageContentStream.moveTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.moveTo(x * scale + margin, labyrinthHeight - y * scale + margin);
isPainting = true;
}
} else {
if (isPainting) {
- pdPageContentStream.lineTo(x * scale + margin, y * scale + margin);
+ pdPageContentStream.lineTo(x * scale + margin, labyrinthHeight - y * scale + margin);
pdPageContentStream.stroke();
isPainting = false;
}
}
}
if (isPainting) {
- pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, labyrinth.getHeight() * scale + margin);
+ pdPageContentStream.lineTo(labyrinth.getWidth() * scale + margin, labyrinthHeight - labyrinth.getHeight() * scale + margin);
pdPageContentStream.stroke();
}
}