public static RenderContext CreateRenderContext(ref RenderContextCreateInfo contextCI, Sdl2Window window)
{
GraphicsBackend?backend = contextCI.Backend;
if (!backend.HasValue)
{
backend = GetPlatformDefaultBackend();
}
switch (backend)
{
case GraphicsBackend.Direct3D11:
return(CreateDefaultD3DRenderContext(ref contextCI, window));
case GraphicsBackend.OpenGL:
return(CreateDefaultOpenGLRenderContext(ref contextCI, window));
case GraphicsBackend.OpenGLES:
return(CreateDefaultOpenGLESRenderContext(ref contextCI, window));
case GraphicsBackend.Vulkan:
return(CreateVulkanRenderContext(ref contextCI, window));
default:
throw new VeldridException("Invalid GraphicsBackend: " + contextCI.Backend);
}
}
public static void CreateWindowAndRenderContext(
ref WindowCreateInfo windowCI,
ref RenderContextCreateInfo contextCI,
out Sdl2Window window,
out RenderContext rc)
{
window = CreateWindow(ref windowCI);
rc = CreateRenderContext(ref contextCI, window);
}
public static D3DRenderContext CreateDefaultD3DRenderContext(ref RenderContextCreateInfo contextCI, Sdl2Window window)
{
SharpDX.Direct3D11.DeviceCreationFlags flags = SharpDX.Direct3D11.DeviceCreationFlags.None;
if (contextCI.DebugContext)
{
flags |= SharpDX.Direct3D11.DeviceCreationFlags.Debug;
}
return(new D3DRenderContext(window, flags));
}
public static unsafe RenderContext CreateVulkanRenderContext(ref RenderContextCreateInfo contextCI, Sdl2Window window)
{
IntPtr sdlHandle = window.SdlWindowHandle;
SDL_SysWMinfo sysWmInfo;
Sdl2Native.SDL_GetVersion(&sysWmInfo.version);
Sdl2Native.SDL_GetWMWindowInfo(sdlHandle, &sysWmInfo);
VkSurfaceSource surfaceSource = GetSurfaceSource(sysWmInfo);
VkRenderContext rc = new VkRenderContext(surfaceSource, window.Width, window.Height);
if (contextCI.DebugContext)
{
rc.EnableDebugCallback();
}
return(rc);
}
public static OpenGLRenderContext CreateDefaultOpenGLRenderContext(ref RenderContextCreateInfo contextCI, Sdl2Window window)
{
IntPtr sdlHandle = window.SdlWindowHandle;
if (contextCI.DebugContext)
{
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextFlags, (int)SDL_GLContextFlag.Debug);
}
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextProfileMask, (int)SDL_GLProfile.Core);
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextMajorVersion, 4);
Sdl2Native.SDL_GL_SetAttribute(SDL_GLAttribute.ContextMinorVersion, 0);
IntPtr contextHandle = Sdl2Native.SDL_GL_CreateContext(sdlHandle);
if (contextHandle == IntPtr.Zero)
{
unsafe
{
byte * error = Sdl2Native.SDL_GetError();
string errorString = Utilities.GetString(error);
throw new VeldridException("Unable to create GL Context: " + errorString);
}
}
Sdl2Native.SDL_GL_MakeCurrent(sdlHandle, contextHandle);
OpenGLPlatformContextInfo ci = new OpenGLPlatformContextInfo(
contextHandle,
Sdl2Native.SDL_GL_GetProcAddress,
Sdl2Native.SDL_GL_GetCurrentContext,
() => Sdl2Native.SDL_GL_SwapWindow(sdlHandle));
OpenGLRenderContext rc = new OpenGLRenderContext(window, ci);
if (contextCI.DebugContext)
{
// Slows things down significantly -- Only use when debugging something specific.
rc.EnableDebugCallback(OpenTK.Graphics.OpenGL.DebugSeverity.DebugSeverityNotification);
}
return(rc);
}