From b05ce1e96f47fbcd9ed2932bb459b42dadab50f8 Mon Sep 17 00:00:00 2001
From: Graham <gpe@openrs2.dev>
Date: Sun, 12 Jan 2020 13:26:00 +0000
Subject: [PATCH] Add ResouceTransformer skeleton

---
 .../main/java/dev/openrs2/bundler/Bundler.kt  |  4 +-
 .../main/java/dev/openrs2/bundler/Resource.kt | 96 +++++++++++++++++++
 .../bundler/transform/ResourceTransformer.kt  | 10 ++
 3 files changed, 109 insertions(+), 1 deletion(-)
 create mode 100644 bundler/src/main/java/dev/openrs2/bundler/Resource.kt
 create mode 100644 bundler/src/main/java/dev/openrs2/bundler/transform/ResourceTransformer.kt

diff --git a/bundler/src/main/java/dev/openrs2/bundler/Bundler.kt b/bundler/src/main/java/dev/openrs2/bundler/Bundler.kt
index 68262dd6c8..0a8f4308c1 100644
--- a/bundler/src/main/java/dev/openrs2/bundler/Bundler.kt
+++ b/bundler/src/main/java/dev/openrs2/bundler/Bundler.kt
@@ -6,6 +6,7 @@ import dev.openrs2.bundler.transform.HostCheckTransformer
 import dev.openrs2.bundler.transform.LoadLibraryTransformer
 import dev.openrs2.bundler.transform.MacResizeTransformer
 import dev.openrs2.bundler.transform.PlatformDetectionTransformer
+import dev.openrs2.bundler.transform.ResourceTransformer
 import dev.openrs2.bundler.transform.RightClickTransformer
 
 class Bundler {
@@ -17,7 +18,8 @@ class Bundler {
             MacResizeTransformer(),
             RightClickTransformer(),
             LoadLibraryTransformer(),
-            PlatformDetectionTransformer()
+            PlatformDetectionTransformer(),
+            ResourceTransformer()
         )
     }
 }
diff --git a/bundler/src/main/java/dev/openrs2/bundler/Resource.kt b/bundler/src/main/java/dev/openrs2/bundler/Resource.kt
new file mode 100644
index 0000000000..8233178c62
--- /dev/null
+++ b/bundler/src/main/java/dev/openrs2/bundler/Resource.kt
@@ -0,0 +1,96 @@
+package dev.openrs2.bundler
+
+import java.security.MessageDigest
+import java.util.zip.CRC32
+import java.util.zip.Deflater
+
+class Resource(
+    val source: String,
+    val destination: String,
+    val digest: ByteArray,
+    val uncompressedSize: Int,
+    val content: ByteArray
+) {
+    val compressedSize: Int
+        get() = content.size
+
+    init {
+        require(digest.size == 20)
+    }
+
+    companion object {
+        fun compress(source: String, destination: String, uncompressed: ByteArray): Resource {
+            val crc = CRC32()
+            crc.update(uncompressed)
+
+            val sourceWithCrc = source.replace(".", "_${crc.value.toInt()}.")
+
+            val digest = MessageDigest.getInstance("SHA-1")
+            digest.update(uncompressed)
+
+            val compressed = ByteArray(uncompressed.size)
+            val compressedSize: Int
+            val deflater = Deflater(Deflater.BEST_COMPRESSION, true)
+            try {
+                deflater.setInput(uncompressed)
+                deflater.finish()
+
+                compressedSize = deflater.deflate(compressed)
+            } finally {
+                deflater.end()
+            }
+
+            val content = if (compressedSize < uncompressed.size) {
+                compressed.copyOf(compressedSize)
+            } else {
+                uncompressed
+            }
+
+            return Resource(sourceWithCrc, destination, digest.digest(), uncompressed.size, content)
+        }
+
+        private fun compress(source: String, destination: String, resource: String): Resource {
+            val uncompressed = Resource::class.java.getResourceAsStream(resource).use { it.readBytes() }
+            return compress(source, destination, uncompressed)
+        }
+
+        fun compressGlResources() = listOf(
+            // Windows i386
+            listOf(
+                compress("jaggl_0_0.lib", "jaggl.dll", "/natives/windows-i386/jaggl.dll")
+            ),
+
+            // Windows amd64
+            listOf(
+                compress("jaggl_1_0.lib", "jaggl.dll", "/natives/windows-amd64/jaggl.dll")
+            ),
+
+            // macOS i386
+            listOf(
+                compress("jaggl_2_0.lib", "libjaggl.dylib", "/natives/mac-i386/libjaggl.dylib")
+            ),
+
+            // macOS amd64
+            listOf(
+                compress("jaggl_3_0.lib", "libjaggl.dylib", "/natives/mac-amd64/libjaggl.dylib")
+            ),
+
+            // Linux i386
+            listOf(
+                compress("jaggl_4_0.lib", "libjaggl.so", "/natives/linux-i386/libjaggl.so"),
+                compress("jaggl_4_1.lib", "libjaggl_dri.so", "/natives/linux-i386/libjaggl_dri.so")
+            ),
+
+            // Linux amd64
+            listOf(
+                compress("jaggl_5_0.lib", "libjaggl.so", "/natives/linux-amd64/libjaggl.so"),
+                compress("jaggl_5_1.lib", "libjaggl_dri.so", "/natives/linux-amd64/libjaggl_dri.so")
+            )
+        )
+
+        fun compressMiscResources() = listOf(
+            compress("jagmisc_0.lib", "jagmisc.dll", "/natives/windows-i386/jagmisc.dll"),
+            compress("jagmisc_1.lib", "jagmisc.dll", "/natives/windows-amd64/jagmisc.dll")
+        )
+    }
+}
diff --git a/bundler/src/main/java/dev/openrs2/bundler/transform/ResourceTransformer.kt b/bundler/src/main/java/dev/openrs2/bundler/transform/ResourceTransformer.kt
new file mode 100644
index 0000000000..f7f52911d5
--- /dev/null
+++ b/bundler/src/main/java/dev/openrs2/bundler/transform/ResourceTransformer.kt
@@ -0,0 +1,10 @@
+package dev.openrs2.bundler.transform
+
+import dev.openrs2.asm.transform.Transformer
+import dev.openrs2.bundler.Resource
+
+class ResourceTransformer(
+    private val resources: List<Resource>? = null,
+    private val glResources: List<List<Resource>> = Resource.compressGlResources(),
+    private val miscResources: List<Resource> = Resource.compressMiscResources()
+) : Transformer()