From be73b40ae8bb16bd51d08fbfda2c823886b5f093 Mon Sep 17 00:00:00 2001
From: Christian Semmler <mail@csemmler.com>
Date: Wed, 2 Jul 2025 19:10:02 -0700
Subject: [PATCH 1/2] Add monkey patch to Emscripten to disable
 `OffscreenCanvas` at runtime (#493)

* Add runtime option to disable OffscreenCanvas in web port

* Remove old patch
---
 .../{libwasmfs_fetch.js.patch => emscripten.patch}  | 13 +++++++++++++
 docker/emscripten/Dockerfile                        |  6 +++---
 2 files changed, 16 insertions(+), 3 deletions(-)
 rename ISLE/emscripten/{libwasmfs_fetch.js.patch => emscripten.patch} (88%)

diff --git a/ISLE/emscripten/libwasmfs_fetch.js.patch b/ISLE/emscripten/emscripten.patch
similarity index 88%
rename from ISLE/emscripten/libwasmfs_fetch.js.patch
rename to ISLE/emscripten/emscripten.patch
index de8fab60..899d72eb 100644
--- a/ISLE/emscripten/libwasmfs_fetch.js.patch
+++ b/ISLE/emscripten/emscripten.patch
@@ -1,3 +1,16 @@
+diff --git a/src/lib/libpthread.js b/src/lib/libpthread.js
+index 6d979627e..97e3f8684 100644
+--- a/src/lib/libpthread.js
++++ b/src/lib/libpthread.js
+@@ -697,7 +697,7 @@ var LibraryPThread = {
+     {
+       transferredCanvasNames = UTF8ToString(transferredCanvasNames).trim();
+     }
+-    transferredCanvasNames = transferredCanvasNames ? transferredCanvasNames.split(',') : [];
++    transferredCanvasNames = transferredCanvasNames && !Module['disableOffscreenCanvases'] ? transferredCanvasNames.split(',') : [];
+ #if GL_DEBUG
+     dbg(`pthread_create: transferredCanvasNames="${transferredCanvasNames}"`);
+ #endif
 diff --git a/src/lib/libwasmfs_fetch.js b/src/lib/libwasmfs_fetch.js
 index e8c9f7e21..caf1971d2 100644
 --- a/src/lib/libwasmfs_fetch.js
diff --git a/docker/emscripten/Dockerfile b/docker/emscripten/Dockerfile
index f234e9ed..a213093c 100644
--- a/docker/emscripten/Dockerfile
+++ b/docker/emscripten/Dockerfile
@@ -16,10 +16,10 @@ RUN chown -R emscripten:emscripten /src
 
 USER emscripten
 
-COPY ISLE/emscripten/libwasmfs_fetch.js.patch /tmp/
+COPY ISLE/emscripten/emscripten.patch /tmp/
 RUN cd /emsdk/upstream/emscripten && \
-    git apply --check /tmp/libwasmfs_fetch.js.patch && \
-    git apply /tmp/libwasmfs_fetch.js.patch
+    git apply --check /tmp/emscripten.patch && \
+    git apply /tmp/emscripten.patch
 
 COPY --chown=emscripten:emscripten 3rdparty/ ./3rdparty/
 COPY --chown=emscripten:emscripten LEGO1/ ./LEGO1/

From 605163b755273fd46fad57194bddd186b221b259 Mon Sep 17 00:00:00 2001
From: Anders Jenbo <anders@jenbo.dk>
Date: Thu, 3 Jul 2025 04:57:57 +0200
Subject: [PATCH 2/2] Fix WindowsTransition (#495)

---
 .../src/common/mxtransitionmanager.cpp        | 39 +++++++++++++++----
 1 file changed, 32 insertions(+), 7 deletions(-)

diff --git a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
index 9e052430..8c2c994d 100644
--- a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
+++ b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp
@@ -469,17 +469,42 @@ void MxTransitionManager::WindowsTransition()
 
 		MxS32 bytesPerPixel = ddsd.ddpfPixelFormat.dwRGBBitCount / 8;
 
-		memset(line, 0, ddsd.lPitch);
+		if (bytesPerPixel == 4) {
+			MxU32* pixels = (MxU32*) line;
+			for (int i = 0; i < 640; i++) {
+				pixels[i] = 0xFF000000;
+			}
 
-		for (MxS32 i = m_animationTimer + 1; i < 480 - m_animationTimer; i++) {
-			line += ddsd.lPitch;
+			for (MxS32 i = m_animationTimer + 1; i < 480 - m_animationTimer - 1; i++) {
+				line += ddsd.lPitch;
+				pixels = (MxU32*) line;
+				pixels[m_animationTimer] = 0xFF000000;
+				pixels[639 - m_animationTimer] = 0xFF000000;
+			}
 
-			memset(line + m_animationTimer * bytesPerPixel, 0, bytesPerPixel);
-			memset(line + 640 + (-1 - m_animationTimer) * bytesPerPixel, 0, bytesPerPixel);
+			if (m_animationTimer < 240 - 1) {
+				line += ddsd.lPitch;
+				pixels = (MxU32*) line;
+				for (int i = 0; i < 640; i++) {
+					pixels[i] = 0xFF000000;
+				}
+			}
 		}
+		else {
+			memset(line, 0, 640 * bytesPerPixel);
 
-		line += ddsd.lPitch;
-		memset(line, 0, ddsd.lPitch);
+			for (MxS32 i = m_animationTimer + 1; i < 480 - m_animationTimer - 1; i++) {
+				line += ddsd.lPitch;
+
+				memset(line + m_animationTimer * bytesPerPixel, 0, bytesPerPixel);
+				memset(line + (639 - m_animationTimer) * bytesPerPixel, 0, bytesPerPixel);
+			}
+
+			if (m_animationTimer < 240 - 1) {
+				line += ddsd.lPitch;
+				memset(line, 0, 640 * bytesPerPixel);
+			}
+		}
 
 		SetupCopyRect(&ddsd);
 		m_ddSurface->Unlock(ddsd.lpSurface);