From 1a903f06e0152ee3d46d9d448feceb4356dc0ec3 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <anonymous.maarten@gmail.com>
Date: Thu, 19 Dec 2024 15:50:28 +0100
Subject: [PATCH] Implement TglD3DRMIMAGE::CreateBuffer (ecx/edi are swapped)

---
 LEGO1/tgl/d3drm/texture.cpp | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/LEGO1/tgl/d3drm/texture.cpp b/LEGO1/tgl/d3drm/texture.cpp
index a51a5c0b..52dec7fe 100644
--- a/LEGO1/tgl/d3drm/texture.cpp
+++ b/LEGO1/tgl/d3drm/texture.cpp
@@ -86,10 +86,38 @@ void TglD3DRMIMAGE::Destroy()
 	delete m_image.palette;
 }
 
-// STUB: LEGO1 0x100a13e0
+static inline int IsPowerOfTwo(int v) {
+    int m = 0;
+    while (v > 2 && m == 0) {
+        m = v % 2;
+        v /= 2;
+    }
+    return v == 2 && m == 0;
+}
+
+// FUNCTION: LEGO1 0x100a13e0
 Result TglD3DRMIMAGE::CreateBuffer(int width, int height, int depth, void* pBuffer, int useBuffer)
 {
-	return Error;
+    if (!(IsPowerOfTwo(width) && IsPowerOfTwo(height) && width % 4 == 0)) {
+        return Error;
+    }
+    m_image.width = width;
+    m_image.height = height;
+    m_image.depth = depth;
+    m_image.bytes_per_line = width;
+    if (!m_texelsAllocatedByClient) {
+        delete[] m_image.buffer1;
+        m_image.buffer1 = NULL;
+    }
+    if (useBuffer) {
+        m_texelsAllocatedByClient = 1;
+        m_image.buffer1 = (char *)pBuffer;
+    } else {
+        m_image.buffer1 = new char[width * height];
+        memcpy(m_image.buffer1, pBuffer, width * height);
+        m_texelsAllocatedByClient = 0;
+    }
+    return Success;
 }
 
 // FUNCTION: LEGO1 0x100a1510