Hello everyone,
I am Jens-Peter Eckervogt ( aka DeafMan1983 ) and make C# wrapper foir SDL2.
Please stop using SDL-CS by Ethan Lee ( @flibitijibibo )!
Reasons:
- related class Marshal
- Marshal’s GetDelegateFunctionPointer()
they don’t work for NativeAOT.
Since Tanner Gooding told me what do I know about new unmanaged function pointer?
like example:
private delegate* unmanaged[Cdecl]<...> pfn_callback;
This makes with SDL_GL_GetProcAddress()
Example with glClearColor():
private void glClearColor(float r, float g, float b, float a)
{
delegate* unmanaged[Cdecl]<float, float, float, float, void> pfn_glClearColor = (delegate* unmanaged[Cdecl]<float, float, float, float, void>)SDL_GL_GetProcAddress(SBytePointerFromString("glClearColor"));
if (pfn_glClearColor != null)
{
pfn_glClearColor(r, g, b, a);
}
}
Like Tanner Gooding has written TerraFX.UI with Xlib and Window for OpenGL and Vulkan
See more!
My new wrapper was less generated by ClangSharpPInvokeGenerator thanks to Tanner Gooding ( @tannergooding )
And I have improved but I will add IMG, MISC, GFX and TTF soon.
Check out my nuget: DeafMan1983.Interop.SDL2
And DeafMan1983.Conversion
You can write simple like this:
/*
dotnet add package DeafMan1983.Interop.SDL2
dotnet add package DeafMan1983.Conversion
Add new lines:
-> <AllowUnsafeBlocks>true</AllowUnsafeBlocks>,
-> <PublishAOT>true</PublishAOT> and
-> <StripSymbols>true</StripSymbols>
in <PropertyGroup> of your <projectname>.csproj
*/
namespace Example.Lessons;
using System;
using static DeafMan1983.ConvFunctions;
using DeafMan1983.Interop.SDL2;
using static DeafMan1983.Interop.SDL2.SDL;
unsafe class Lesson01
{
private SDL_Window* windowl;
private SDL_Renderer* renderer;
private SDL_Event evt;
/*
Important default main function from C/C++
int main(int argc, char** argv)
{
...
}
*/
public int main(int argc, sbyte** argv)
{
if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
{
Console.WriteLine("Error: SDL initializing. {0}.\n", StringFromSBytePointer(SDL_GetError()));
return -1;
}
Console.WriteLine("Woohoo! SDL2 initializes.\n");
window = SDL_CreateWindow(SBytePointerFromString("Hello SDL2"), (int)SDL_WINDOWPOS_CENTERED, (int)SDL_WINDOWPOS_CENTERED, 600, 400, (uint)SDL_WindowFlags.SDL_WINDOW_SHOWN);
if (window == null)
{
Console.WriteLine("Error: Creating SDL_Window {0}.\n", StringFromSBytePointer(SDL_GetError()));
return -1;
}
renderer = SDL_CreateRenderer(window, -1, (uint)SDL_RendererFlags.SDL_RENDERER_SOFTWARE);
if (renderer == null)
{
Console.WriteLine("Error: Creating SDL_Renderer {0}.\n", StringFromSBytePointer(SDL_GetError()));
return -1;
}
while (true)
{
/*
WARNING: You need add fixed statement = It works fine :D
*/
fixed (SDL_Event* evtptrs = &evt)
{
if (SDL_PollEvent(evtptrs) > 0)
{
if (evt.type == (uint)SDL_EventType.SDL_QUIT)
{
Console.WriteLine("Click with frame window!\n");
break;
}
if (evt.type == (uint)SDL_EventType.SDL_KEYDOWN)
{
if (evt.key.keysym.sym == SDL_KeyCode.SDLK_ESCAPE)
{
Console.WriteLine("Press key Escape!\n");
break;
}
}
}
}
// Render
SDL_SetRenderDrawColor(renderer, 255, 255 / 2, 0, 255);
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
static int Main(string[] args)
{
// Reforce with default main function into static int Main() for C#
Lesson01 app = new();
return app.main(args.Length, SByteDoublePointersFromStringArray(args));
}
}
Then you compile with dotnet publish -r <rid> --self-contained=true -c Release then you open bin/Release/net7.0/<rid>/native then you click executable - that is simple native executable program.
Thank you for supporting my new wrapper in the future.
Sorry for @flibitijibibo because he doesn’t care about NativeAOT like he forces me since we write in GitHub but he doesn’t like while I use struct-related instances like SDL_Window, SDL_Renderer etc…
Now I am happy because SDL2 from DeafMan1983.Interop.SDL2 supports for NativeAOT with Net 6.x or greater.
I hope you understand me and happy coding with “modern C#”!
PS: SDL3 but not finish I will fix soon. If SDL3 is completed in release version.
