From 9eadf40d4ca6e26e7972970e727cff1724987954 Mon Sep 17 00:00:00 2001
From: modeco80 <lily.modeco80@protonmail.ch>
Date: Thu, 4 Jul 2024 20:41:11 -0400
Subject: [PATCH] read images (TODO) next is displaying them in the testbed

---
 msagent.js/src/character.ts     |  8 ++++
 msagent.js/src/structs/core.ts  | 22 +++++++++
 msagent.js/src/structs/image.ts | 81 +++++++++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 msagent.js/src/structs/image.ts

diff --git a/msagent.js/src/character.ts b/msagent.js/src/character.ts
index aeb4929..98aef75 100644
--- a/msagent.js/src/character.ts
+++ b/msagent.js/src/character.ts
@@ -3,11 +3,13 @@ import { BufferStream, SeekDir } from './buffer.js';
 import { LOCATION } from './structs/core.js';
 import { AcsCharacterInfo } from './structs/character.js';
 import { AcsAnimationEntry } from './structs/animation.js';
+import { AcsImageEntry } from './structs/image.js';
 
 // Experiment for storing parsed data
 class AcsData {
 	characterInfo = new AcsCharacterInfo();
 	animInfo: AcsAnimationEntry[] = [];
+	images: AcsImageEntry[] = [];
 }
 
 function logOffset(o: number, name: string) {
@@ -44,6 +46,12 @@ function agentCharacterParseACS(buffer: BufferStream) {
 		});
 	});
 
+	buffer.withOffset(imageInfoLocation.offset, () => {
+		acsData.images = buffer.readCountedList(() => {
+			return AcsImageEntry.read(buffer);
+		});
+	});
+
 	console.log(acsData);
 }
 
diff --git a/msagent.js/src/structs/core.ts b/msagent.js/src/structs/core.ts
index 13cc504..a2b4df2 100644
--- a/msagent.js/src/structs/core.ts
+++ b/msagent.js/src/structs/core.ts
@@ -1,4 +1,5 @@
 import { BufferStream, SeekDir } from '../buffer.js';
+import { compressDecompress } from '../decompress.js';
 
 // Win32 Rect
 export class RECT {
@@ -114,3 +115,24 @@ export class RGBAColor {
 		return RGBAColor.from_gdi_rgbquad(buffer.readU32LE());
 	}
 }
+
+export class COMPRESSED_DATABLOCK {
+  data: Uint8Array = new Uint8Array();
+
+  static read(buffer: BufferStream) {
+	let compressed = new COMPRESSED_DATABLOCK();
+
+	let compressedSize = buffer.readU32LE();
+	let uncompressedSize = buffer.readU32LE();
+
+	if(compressedSize == 0)
+		compressed.data = buffer.subBuffer(uncompressedSize).raw();
+	else {
+		let data = buffer.subBuffer(compressedSize).raw();
+		compressed.data = new Uint8Array(uncompressedSize);
+		compressDecompress(data, compressed.data);
+	}
+
+	return compressed;
+  }
+}
diff --git a/msagent.js/src/structs/image.ts b/msagent.js/src/structs/image.ts
new file mode 100644
index 0000000..f19fc61
--- /dev/null
+++ b/msagent.js/src/structs/image.ts
@@ -0,0 +1,81 @@
+/*
+struct AcsImageInfo {
+    u8 unkStart;
+    u16 width;
+    u16 height;
+    bool isCompressed;
+    
+    // This algorithm is the size used for allocating
+    // the decompression buffer.
+    //     ((Width + 3) & 0xFC) * Height)
+    
+    // Data
+    DATABLOCK imageData;
+    
+    // The data here is a Win32 RGNDATA
+    COMPRESSED regionData;
+};
+
+struct AcsImageInfoPointer {
+    LOCATION imageInfoLocation;
+    u32 checksumMaybe;
+    
+    AcsImageInfo imageInfo @ imageInfoLocation.offset;
+};
+*/
+
+import { BufferStream } from '../buffer';
+import { compressDecompress } from '../decompress';
+import { COMPRESSED_DATABLOCK, LOCATION, RGNDATA } from './core';
+
+export class AcsImage {
+	width = 0;
+	height = 0;
+
+	data = new Uint8Array();
+	regionData = new RGNDATA();
+
+	static read(buffer: BufferStream) {
+		let image = new AcsImage();
+
+		// This has unknown purpose
+		let eat = buffer.readU8();
+
+		image.width = buffer.readU16LE();
+		image.height = buffer.readU16LE();
+
+		let isCompressed = buffer.readBool();
+
+		let data = buffer.readDataChunk();
+
+		if (isCompressed) {
+			image.data = new Uint8Array(((image.width + 3) & 0xfc) * image.height);
+			compressDecompress(data, image.data);
+		} else {
+			image.data = data;
+		}
+
+        // this will be a rgndata (TODO) read this
+        //let temp = COMPRESSED_DATABLOCK.read(buffer);
+
+        return image;
+	}
+}
+
+export class AcsImageEntry {
+    image = new AcsImage();
+
+	static read(buffer: BufferStream) {
+		let image = new AcsImageEntry();
+
+		// We discard both after we're done.
+		let loc = LOCATION.read(buffer);
+		let checksum = buffer.readU32LE();
+
+        buffer.withOffset(loc.offset, () => {
+            image.image = AcsImage.read(buffer);
+        });
+
+		return image;
+	}
+}