[changed] TexturePacker to ignore files that have not changed.

diff --git a/extensions/image-packer/src/com/badlogic/gdx/imagepacker/TexturePacker.java b/extensions/image-packer/src/com/badlogic/gdx/imagepacker/TexturePacker.java
index 1856438..01f4846 100644 (file)
--- a/extensions/image-packer/src/com/badlogic/gdx/imagepacker/TexturePacker.java
+++ b/extensions/image-packer/src/com/badlogic/gdx/imagepacker/TexturePacker.java
@@ -18,17 +18,25 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;\r
 import java.awt.image.BufferedImage;\r
 import java.awt.image.WritableRaster;\r
+import java.io.BufferedReader;\r
 import java.io.File;\r
+import java.io.FileInputStream;\r
+import java.io.FileReader;\r
 import java.io.FileWriter;\r
 import java.io.FilenameFilter;\r
 import java.io.IOException;\r
+import java.math.BigInteger;\r
+import java.security.MessageDigest;\r
+import java.security.NoSuchAlgorithmException;\r
 import java.util.ArrayList;\r
 import java.util.Arrays;\r
 import java.util.Collections;\r
 import java.util.Comparator;\r
 import java.util.HashMap;\r
+import java.util.Map.Entry;\r
 import java.util.regex.Matcher;\r
 import java.util.regex.Pattern;\r
+import java.util.zip.CRC32;\r
 \r
 import javax.imageio.ImageIO;\r
 \r
@@ -617,6 +625,9 @@ public class TexturePacker {
                public int minHeight = 16;\r
                public int maxWidth = 1024;\r
                public int maxHeight = 1024;\r
+               public boolean incremental;\r
+\r
+               HashMap<String, Long> crcs = new HashMap();\r
        }\r
 \r
        static private void process (Settings settings, File inputDir, File outputDir, File packFile) throws IOException {\r
@@ -629,6 +640,33 @@ public class TexturePacker {
                                if (file.getName().startsWith(prefix)) file.delete();\r
                }\r
 \r
+               // Abort if nothing has changed.\r
+               if (settings.incremental) {\r
+                       File[] files = inputDir.listFiles();\r
+                       if (files == null) return;\r
+                       boolean noneHaveChanged = true;\r
+                       int childCountNow = 0;\r
+                       for (File file : files) {\r
+                               if (file.isDirectory()) continue;\r
+                               String path = file.getAbsolutePath();\r
+                               Long crcOld = settings.crcs.get(path);\r
+                               long crcNow = crc(file);\r
+                               if (crcOld == null || crcOld != crcNow) noneHaveChanged = false;\r
+                               settings.crcs.put(path, crcNow);\r
+                               childCountNow++;\r
+                       }\r
+                       String path = inputDir.getAbsolutePath();\r
+                       Long childCountOld = settings.crcs.get(path);\r
+                       if (childCountOld == null || childCountNow != childCountOld) noneHaveChanged = false;\r
+                       settings.crcs.put(path, (long)childCountNow);\r
+                       if (noneHaveChanged) {\r
+                               System.out.println(inputDir);\r
+                               System.out.println("Skipping unchanged directory.");\r
+                               System.out.println();\r
+                               return;\r
+                       }\r
+               }\r
+\r
                // Just check all combinations, because we are extremely lazy.\r
                ArrayList<TextureFilter> filters = new ArrayList();\r
                filters.add(null);\r
@@ -687,7 +725,62 @@ public class TexturePacker {
                File packFile = new File(outputDir, "pack");\r
                packFile.delete();\r
 \r
+               // Load incremental data.\r
+               File incrmentalFile = null;\r
+               if (settings.incremental) {\r
+                       settings.crcs.clear();\r
+                       incrmentalFile = new File(System.getProperty("user.home") + "/.texturepacker/" + hash(inputDir.getAbsolutePath()));\r
+                       if (incrmentalFile.exists()) {\r
+                               BufferedReader reader = new BufferedReader(new FileReader(incrmentalFile));\r
+                               while (true) {\r
+                                       String path = reader.readLine();\r
+                                       if (path == null) break;\r
+                                       String crc = reader.readLine();\r
+                                       if (crc == null) break;\r
+                                       settings.crcs.put(path, Long.parseLong(crc));\r
+                               }\r
+                               reader.close();\r
+                       }\r
+               }\r
+\r
                process(settings, inputDir, outputDir, packFile);\r
+\r
+               if (settings.incremental) {\r
+                       incrmentalFile.getParentFile().mkdirs();\r
+                       FileWriter writer = new FileWriter(incrmentalFile);\r
+                       for (Entry<String, Long> entry : settings.crcs.entrySet()) {\r
+                               writer.write(entry.getKey() + "\n");\r
+                               writer.write(entry.getValue() + "\n");\r
+                       }\r
+                       writer.close();\r
+               }\r
+       }\r
+\r
+       static private String hash (String value) {\r
+               try {\r
+                       MessageDigest digest = MessageDigest.getInstance("SHA1");\r
+                       digest.update(value.getBytes());\r
+                       return new BigInteger(1, digest.digest()).toString(16);\r
+               } catch (NoSuchAlgorithmException ex) {\r
+                       throw new RuntimeException(ex);\r
+               }\r
+       }\r
+\r
+       static private long crc (File file) {\r
+               try {\r
+                       FileInputStream input = new FileInputStream(file);\r
+                       byte[] buffer = new byte[4096];\r
+                       CRC32 crc32 = new CRC32();\r
+                       while (true) {\r
+                               int length = input.read(buffer);\r
+                               if (length == -1) break;\r
+                               crc32.update(buffer, 0, length);\r
+                       }\r
+                       input.close();\r
+                       return crc32.getValue();\r
+               } catch (IOException ex) {\r
+                       throw new RuntimeException(ex);\r
+               }\r
        }\r
 \r
        static public void main (String[] args) throws Exception {\r