From b4ff44788a4a53db114ce74de11073387501770a Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Wed, 24 Apr 2024 06:51:37 -0400
Subject: [PATCH] Bring in a simple SDL2 demo for completeness. It's running in
 a main.cpp to test SDL2 in C++.

---
 README.md                           |  2 +-
 sdl2demo/main.cpp                   | 36 +++++++++++++++++++++++++++++
 sdl2demo/meson.build                | 11 +++++++++
 sdl2demo/setup.ps1                  |  5 ++++
 sfmldemo/{sfmlprog.cpp => main.cpp} |  0
 sfmldemo/meson.build                |  6 +++--
 6 files changed, 57 insertions(+), 3 deletions(-)
 create mode 100644 sdl2demo/main.cpp
 create mode 100644 sdl2demo/meson.build
 create mode 100644 sdl2demo/setup.ps1
 rename sfmldemo/{sfmlprog.cpp => main.cpp} (100%)

diff --git a/README.md b/README.md
index 02af62a..439bd8d 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ To get this working the rough (ROUGH) steps are:
 2. Run setup.ps1
 3. `meson compile -C builddir`
 4. `meson install -C builddir`  -- Careful with this, it might install stuff in unwanted areas. On my computer it put them in `C:\` but I have to read the instructions on how to set the install location.
-5. `./builddir/sfmlprog` -- That should run it and you see a window with ImGUI's demo panel.
+5. `./builddir/sfmldemo` -- That should run it and you see a window with ImGUI's demo panel.
 
 I'll have more extensive instructions in a later blog post, but if you have time try this out and let me know how it went at help@learncodethehardway.com.  Please let me know if you tried a different compiler, Windows version, etc.  If you're on OSX or Linux it should work the same but Linux people might want to use their package manager instead.
 
diff --git a/sdl2demo/main.cpp b/sdl2demo/main.cpp
new file mode 100644
index 0000000..39eb0f8
--- /dev/null
+++ b/sdl2demo/main.cpp
@@ -0,0 +1,36 @@
+#include "SDL.h"
+
+int main(int argc, char *argv[])
+{
+    SDL_Window *window;
+    SDL_Renderer *renderer;
+    SDL_Surface *surface;
+    SDL_Event event;
+
+    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s", SDL_GetError());
+        return 3;
+    }
+
+    if (SDL_CreateWindowAndRenderer(1920, 1080, SDL_WINDOW_RESIZABLE, &window, &renderer)) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window and renderer: %s", SDL_GetError());
+        return 3;
+    }
+
+    while (1) {
+        SDL_PollEvent(&event);
+        if (event.type == SDL_QUIT) {
+            break;
+        }
+        SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0x00);
+        SDL_RenderClear(renderer);
+        SDL_RenderPresent(renderer);
+    }
+
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+
+    SDL_Quit();
+
+    return 0;
+}
diff --git a/sdl2demo/meson.build b/sdl2demo/meson.build
new file mode 100644
index 0000000..abd24b0
--- /dev/null
+++ b/sdl2demo/meson.build
@@ -0,0 +1,11 @@
+project('sdl2demo', 'cpp',
+  default_options: [
+    'cpp_std=c++17',
+    ])
+
+sdl2_dep = dependency('sdl2')
+imgui_dep = dependency('imgui')
+
+executable('sdl2demo', 'main.cpp',
+  win_subsystem: 'windows',
+  dependencies: [sdl2_dep, imgui_dep])
diff --git a/sdl2demo/setup.ps1 b/sdl2demo/setup.ps1
new file mode 100644
index 0000000..aa48b9a
--- /dev/null
+++ b/sdl2demo/setup.ps1
@@ -0,0 +1,5 @@
+mkdir builddir
+mkdir subprojects
+meson wrap install imgui
+meson wrap install sdl2
+meson setup builddir
diff --git a/sfmldemo/sfmlprog.cpp b/sfmldemo/main.cpp
similarity index 100%
rename from sfmldemo/sfmlprog.cpp
rename to sfmldemo/main.cpp
diff --git a/sfmldemo/meson.build b/sfmldemo/meson.build
index b03b0f7..4efb0ae 100644
--- a/sfmldemo/meson.build
+++ b/sfmldemo/meson.build
@@ -1,9 +1,11 @@
 project('sfmldemo', 'cpp',
-  default_options: ['cpp_std=c++17'])
+  default_options: [
+    'cpp_std=c++17',
+    ])
 
 sfml_dep = dependency('sfml')
 imgui_dep = dependency('imgui-sfml')
 
-executable('sfmlprog', 'sfmlprog.cpp',
+executable('sfmldemo', 'main.cpp',
   win_subsystem: 'windows',
   dependencies: [sfml_dep, imgui_dep])