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[KMS] Query GPUs lazily

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This commit is contained in:
thefiddler 2014-06-26 22:52:17 +02:00
parent 69dbdb7d67
commit 9bc774f78c
1 changed files with 55 additions and 20 deletions
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75
Source/OpenTK/Platform/Linux/LinuxFactory.cs
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@ -42,16 +42,38 @@ namespace OpenTK.Platform.Linux
// Linux KMS platform
class LinuxFactory : PlatformFactoryBase
{
int fd;
int _fd;
IntPtr gbm_device;
IntPtr display;
IntPtr egl_display;
IJoystickDriver2 JoystickDriver;
IDisplayDeviceDriver DisplayDriver;
IKeyboardDriver2 KeyboardDriver;
const string gpu_path = "/dev/dri"; // card0, card1, ...
public LinuxFactory()
{
Debug.Print("[KMS] Using Linux/KMS backend.");
}
#region Private Members
int gpu_fd
{
get
{
lock (this)
{
if (_fd == 0)
{
_fd = CreateDisplay(out gbm_device, out egl_display);
}
return _fd;
}
}
}
static int CreateDisplay(out IntPtr gbm_device, out IntPtr egl_display)
{
// Query all GPUs until we find one that has a connected display.
// This is necessary in multi-gpu systems, where only one GPU
@ -59,12 +81,16 @@ namespace OpenTK.Platform.Linux
// Todo: allow OpenTK to drive multiple GPUs
// Todo: allow OpenTK to run on an offscreen GPU
// Todo: allow the user to pick a GPU
int fd = 0;
gbm_device = IntPtr.Zero;
egl_display = IntPtr.Zero;
var files = Directory.GetFiles(gpu_path);
foreach (var gpu in files)
{
if (Path.GetFileName(gpu).StartsWith("card"))
{
int test_fd = SetupDisplay(gpu);
int test_fd = SetupDisplay(gpu, out gbm_device, out egl_display);
if (test_fd >= 0)
{
try
@ -91,13 +117,16 @@ namespace OpenTK.Platform.Linux
Debug.Print("[Error] No valid GPU found, bailing out.");
throw new PlatformNotSupportedException();
}
return fd;
}
#region Private Members
int SetupDisplay(string gpu)
static int SetupDisplay(string gpu, out IntPtr gbm_device, out IntPtr egl_display)
{
Debug.Print("[KMS] Attempting to use gpu '{0}'.", gpu);
gbm_device = IntPtr.Zero;
egl_display = IntPtr.Zero;
int fd = Libc.open(gpu, OpenFlags.ReadWrite | OpenFlags.CloseOnExec);
if (fd < 0)
@ -114,20 +143,20 @@ namespace OpenTK.Platform.Linux
}
Debug.Print("[KMS] GBM {0:x} created successfully; ", gbm_device);
display = Egl.GetDisplay(gbm_device);
if (display == IntPtr.Zero)
egl_display = Egl.GetDisplay(gbm_device);
if (egl_display == IntPtr.Zero)
{
throw new NotSupportedException("[KMS] Failed to create EGL display");
}
Debug.Print("[KMS] EGL display {0:x} created successfully", display);
Debug.Print("[KMS] EGL display {0:x} created successfully", egl_display);
int major, minor;
if (!Egl.Initialize(display, out major, out minor))
if (!Egl.Initialize(egl_display, out major, out minor))
{
ErrorCode error = Egl.GetError();
throw new NotSupportedException("[KMS] Failed to initialize EGL display. Error code: " + error);
}
Debug.Print("[KMS] EGL {0}.{1} initialized successfully on display {2:x}", major, minor, display);
Debug.Print("[KMS] EGL {0}.{1} initialized successfully on display {2:x}", major, minor, egl_display);
return fd;
}
@ -138,19 +167,19 @@ namespace OpenTK.Platform.Linux
protected override void Dispose(bool manual)
{
if (display != IntPtr.Zero)
if (egl_display != IntPtr.Zero)
{
Egl.Terminate(display);
display = IntPtr.Zero;
Egl.Terminate(egl_display);
egl_display = IntPtr.Zero;
}
if (gbm_device != IntPtr.Zero)
{
Gbm.DestroyDevice(gbm_device);
gbm_device = IntPtr.Zero;
}
if (fd >= 0)
if (_fd >= 0)
{
Libc.close(fd);
Libc.close(_fd);
}
base.Dispose(manual);
@ -162,12 +191,12 @@ namespace OpenTK.Platform.Linux
public override INativeWindow CreateNativeWindow(int x, int y, int width, int height, string title, GraphicsMode mode, GameWindowFlags options, DisplayDevice display_device)
{
return new LinuxNativeWindow(display, gbm_device, fd, x, y, width, height, title, mode, options, display_device);
return new LinuxNativeWindow(egl_display, gbm_device, gpu_fd, x, y, width, height, title, mode, options, display_device);
}
public override IDisplayDeviceDriver CreateDisplayDeviceDriver()
{
return new LinuxDisplayDriver(fd);
return new LinuxDisplayDriver(gpu_fd);
}
public override IGraphicsContext CreateGLContext(GraphicsMode mode, IWindowInfo window, IGraphicsContext shareContext, bool directRendering, int major, int minor, GraphicsContextFlags flags)
@ -185,7 +214,13 @@ namespace OpenTK.Platform.Linux
public override IKeyboardDriver2 CreateKeyboardDriver()
{
throw new NotImplementedException();
lock (this)
{
KeyboardDriver = KeyboardDriver ??
(IKeyboardDriver2)new LinuxKeyboardLibInput() ??
(IKeyboardDriver2)new LinuxKeyboardTTY();
return KeyboardDriver;
}
}
public override IMouseDriver2 CreateMouseDriver()