From 730b52573a4ac2bb89cb256f730fc4b0b0f78ce1 Mon Sep 17 00:00:00 2001
From: wang rong <w_angrong>
Date: Mon, 22 Jun 2020 17:50:08 +0800
Subject: [PATCH] add apply_SDL_patch.md doc

---
 docs/apply_SDL_patch.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 docs/apply_SDL_patch.md

diff --git a/docs/apply_SDL_patch.md b/docs/apply_SDL_patch.md
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@@ -0,0 +1,20 @@
+# Apply SDL patch
+
+There are some bugs we have to change sdl library or we found it is a better to fix it inside sdl instead of fixing it in anbox.
+This patches are here:  _anbox/external/libSDL/_ . You can download sdl library(refer to section "Download SDL") to apply these patches(refer to section "Apply SDL patch") if needed.
+
+## Download SDL
+
+Currently, anbox based on SDL2, so our patches are based on SDL2. You can download the souce package here: 
+ _https://www.libsdl.org/release/SDL2-2.0.9.tar.gz_ 
+
+## Apply SDL patch
+
+```
+1. Unzip the files you downloaded
+2. cd <your dir>/libsdl2-2.0.9+dfsg1
+3. patch -p1 < <your dir>/<patch name>.patch
+4. dpkg-buildpackage -rfakeroot -b
+5. cd ..
+6. dpkg -i ./*.deb
+```
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