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using OpenTK;
using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Configuration;
using Ryujinx.Common.Logging;
using Ryujinx.Graphics.OpenGL;
using Ryujinx.Input.HLE;
using System;
using static SDL2.SDL;
namespace Ryujinx.Headless.SDL2.OpenGL
{
class OpenGLWindow : WindowBase
{
private static void CheckResult(int result)
{
if (result < 0)
{
throw new InvalidOperationException($"SDL_GL function returned an error: {SDL_GetError()}");
}
}
private static void SetupOpenGLAttributes(bool sharedContext, GraphicsDebugLevel debugLevel)
{
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_CONTEXT_MAJOR_VERSION, 3));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_CONTEXT_MINOR_VERSION, 3));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_CONTEXT_PROFILE_MASK, SDL_GLprofile.SDL_GL_CONTEXT_PROFILE_COMPATIBILITY));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_CONTEXT_FLAGS, debugLevel != GraphicsDebugLevel.None ? (int)SDL_GLcontext.SDL_GL_CONTEXT_DEBUG_FLAG : 0));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_SHARE_WITH_CURRENT_CONTEXT, sharedContext ? 1 : 0));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_ACCELERATED_VISUAL, 1));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_RED_SIZE, 8));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_GREEN_SIZE, 8));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_BLUE_SIZE, 8));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_ALPHA_SIZE, 8));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_DEPTH_SIZE, 16));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_STENCIL_SIZE, 0));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_DOUBLEBUFFER, 1));
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_STEREO, 0));
}
private class OpenToolkitBindingsContext : IBindingsContext
{
public IntPtr GetProcAddress(string procName)
{
return SDL_GL_GetProcAddress(procName);
}
}
private class SDL2OpenGLContext : IOpenGLContext
{
private readonly IntPtr _context;
private readonly IntPtr _window;
private readonly bool _shouldDisposeWindow;
public SDL2OpenGLContext(IntPtr context, IntPtr window, bool shouldDisposeWindow = true)
{
_context = context;
_window = window;
_shouldDisposeWindow = shouldDisposeWindow;
}
public static SDL2OpenGLContext CreateBackgroundContext(SDL2OpenGLContext sharedContext)
{
sharedContext.MakeCurrent();
// Ensure we share our contexts.
SetupOpenGLAttributes(true, GraphicsDebugLevel.None);
IntPtr windowHandle = SDL_CreateWindow("Ryujinx background context window", 0, 0, 1, 1, SDL_WindowFlags.SDL_WINDOW_OPENGL | SDL_WindowFlags.SDL_WINDOW_HIDDEN);
IntPtr context = SDL_GL_CreateContext(windowHandle);
GL.LoadBindings(new OpenToolkitBindingsContext());
CheckResult(SDL_GL_SetAttribute(SDL_GLattr.SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 0));
CheckResult(SDL_GL_MakeCurrent(windowHandle, IntPtr.Zero));
return new SDL2OpenGLContext(context, windowHandle);
}
public void MakeCurrent()
{
if (SDL_GL_GetCurrentContext() == _context || SDL_GL_GetCurrentWindow() == _window)
{
return;
}
int res = SDL_GL_MakeCurrent(_window, _context);
if (res != 0)
{
string errorMessage = $"SDL_GL_CreateContext failed with error \"{SDL_GetError()}\"";
Logger.Error?.Print(LogClass.Application, errorMessage);
throw new Exception(errorMessage);
}
}
public bool HasContext() => SDL_GL_GetCurrentContext() != IntPtr.Zero;
public void Dispose()
{
SDL_GL_DeleteContext(_context);
if (_shouldDisposeWindow)
{
SDL_DestroyWindow(_window);
}
}
}
private readonly GraphicsDebugLevel _glLogLevel;
private SDL2OpenGLContext _openGLContext;
public OpenGLWindow(
InputManager inputManager,
GraphicsDebugLevel glLogLevel,
AspectRatio aspectRatio,
bool enableMouse,
HideCursorMode hideCursorMode)
: base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode)
{
_glLogLevel = glLogLevel;
}
public override SDL_WindowFlags GetWindowFlags() => SDL_WindowFlags.SDL_WINDOW_OPENGL;
protected override void InitializeWindowRenderer()
{
// Ensure to not share this context with other contexts before this point.
SetupOpenGLAttributes(false, _glLogLevel);
IntPtr context = SDL_GL_CreateContext(WindowHandle);
CheckResult(SDL_GL_SetSwapInterval(1));
if (context == IntPtr.Zero)
{
string errorMessage = $"SDL_GL_CreateContext failed with error \"{SDL_GetError()}\"";
Logger.Error?.Print(LogClass.Application, errorMessage);
throw new Exception(errorMessage);
}
// NOTE: The window handle needs to be disposed by the thread that created it and is handled separately.
_openGLContext = new SDL2OpenGLContext(context, WindowHandle, false);
// First take exclusivity on the OpenGL context.
((OpenGLRenderer)Renderer).InitializeBackgroundContext(SDL2OpenGLContext.CreateBackgroundContext(_openGLContext));
_openGLContext.MakeCurrent();
GL.ClearColor(0, 0, 0, 1.0f);
GL.Clear(ClearBufferMask.ColorBufferBit);
SwapBuffers();
if (IsExclusiveFullscreen)
{
Renderer?.Window.SetSize(ExclusiveFullscreenWidth, ExclusiveFullscreenHeight);
MouseDriver.SetClientSize(ExclusiveFullscreenWidth, ExclusiveFullscreenHeight);
}
else if (IsFullscreen)
{
// NOTE: grabbing the main display's dimensions directly as OpenGL doesn't scale along like the VulkanWindow.
if (SDL_GetDisplayBounds(DisplayId, out SDL_Rect displayBounds) < 0)
{
Logger.Warning?.Print(LogClass.Application, $"Could not retrieve display bounds: {SDL_GetError()}");
// Fallback to defaults
displayBounds.w = DefaultWidth;
displayBounds.h = DefaultHeight;
}
Renderer?.Window.SetSize(displayBounds.w, displayBounds.h);
MouseDriver.SetClientSize(displayBounds.w, displayBounds.h);
}
else
{
Renderer?.Window.SetSize(DefaultWidth, DefaultHeight);
MouseDriver.SetClientSize(DefaultWidth, DefaultHeight);
}
}
protected override void InitializeRenderer() { }
protected override void FinalizeWindowRenderer()
{
// Try to bind the OpenGL context before calling the gpu disposal.
_openGLContext.MakeCurrent();
Device.DisposeGpu();
// Unbind context and destroy everything
CheckResult(SDL_GL_MakeCurrent(WindowHandle, IntPtr.Zero));
_openGLContext.Dispose();
}
protected override void SwapBuffers()
{
SDL_GL_SwapWindow(WindowHandle);
}
}
}
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