From 95d061e4fca2f7903ac903a2426cb5ad30c737f7 Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Wed, 29 Oct 2025 20:50:09 +0800
Subject: Use SDL as submodule.

---
 .github/workflows/ci.yml              | 2 +-
 .gitmodules                           | 3 +++
 CMakeLists.txt                        | 1 +
 include/cru/platform/gui/sdl/Window.h | 2 +-
 lib/SDL                               | 1 +
 src/platform/gui/sdl/CMakeLists.txt   | 4 +---
 src/platform/gui/sdl/Window.cpp       | 2 +-
 7 files changed, 9 insertions(+), 6 deletions(-)
 create mode 160000 lib/SDL

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 142b472f..62eb32c4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -89,7 +89,7 @@ jobs:
         run: |
           sudo apt update
           sudo apt install -y libpng-dev libcairo2-dev libpango1.0-dev libxcb1-dev libxcb-cursor-dev \
-            libxkbcommon-dev libxcb-imdkit-dev libxkbcommon-x11-dev libsdl2-dev
+            libxkbcommon-dev libxcb-imdkit-dev libxkbcommon-x11-dev
 
       - name: Build
         run: |
diff --git a/.gitmodules b/.gitmodules
index d49fb062..3acf86e8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "lib/Catch2"]
 	path = lib/Catch2
 	url = https://github.com/catchorg/Catch2.git
+[submodule "lib/SDL"]
+	path = lib/SDL
+	url = https://github.com/libsdl-org/SDL.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 980ff1ff..a5315b73 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,6 +16,7 @@ if (APPLE)
 endif()
 
 add_subdirectory(lib/Catch2)
+add_subdirectory(lib/SDL)
 
 enable_testing()
 
diff --git a/include/cru/platform/gui/sdl/Window.h b/include/cru/platform/gui/sdl/Window.h
index 4eb0a11d..c818ecce 100644
--- a/include/cru/platform/gui/sdl/Window.h
+++ b/include/cru/platform/gui/sdl/Window.h
@@ -4,7 +4,7 @@
 #include "../Window.h"
 #include "Base.h"
 
-#include <SDL_video.h>
+#include <SDL3/SDL_video.h>
 #include <cstddef>
 #include <optional>
 
diff --git a/lib/SDL b/lib/SDL
new file mode 160000
index 00000000..cecf4b0d
--- /dev/null
+++ b/lib/SDL
@@ -0,0 +1 @@
+Subproject commit cecf4b0d4e771fea01ecbd0594a948ee0f872fb5
diff --git a/src/platform/gui/sdl/CMakeLists.txt b/src/platform/gui/sdl/CMakeLists.txt
index f4266622..7d95f681 100644
--- a/src/platform/gui/sdl/CMakeLists.txt
+++ b/src/platform/gui/sdl/CMakeLists.txt
@@ -1,10 +1,8 @@
-find_package(SDL2 REQUIRED CONFIG REQUIRED COMPONENTS SDL2)
-
 add_library(CruPlatformGuiSdl
 	UiApplication.cpp
 	Window.cpp
 )
 target_link_libraries(CruPlatformGuiSdl PUBLIC
 	CruPlatformGui CruPlatformGraphicsCairo
-	SDL2::SDL2
+	SDL3::SDL3
 )
diff --git a/src/platform/gui/sdl/Window.cpp b/src/platform/gui/sdl/Window.cpp
index 84cf0ad4..3737cae0 100644
--- a/src/platform/gui/sdl/Window.cpp
+++ b/src/platform/gui/sdl/Window.cpp
@@ -8,7 +8,7 @@
 #include "cru/platform/gui/Window.h"
 #include "cru/platform/gui/sdl/UiApplication.h"
 
-#include <SDL_video.h>
+#include <SDL3/SDL_video.h>
 #include <cairo-xcb.h>
 #include <cairo.h>
 #include <cassert>
-- 
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