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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 // Linux KMS platform
class LinuxFactory : PlatformFactoryBase class LinuxFactory : PlatformFactoryBase
{ {
int fd; int _fd;
IntPtr gbm_device; IntPtr gbm_device;
IntPtr display; IntPtr egl_display;
IJoystickDriver2 JoystickDriver; IJoystickDriver2 JoystickDriver;
IDisplayDeviceDriver DisplayDriver; IKeyboardDriver2 KeyboardDriver;
const string gpu_path = "/dev/dri"; // card0, card1, ... const string gpu_path = "/dev/dri"; // card0, card1, ...
public LinuxFactory() 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. // Query all GPUs until we find one that has a connected display.
// This is necessary in multi-gpu systems, where only one GPU // 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 drive multiple GPUs
// Todo: allow OpenTK to run on an offscreen GPU // Todo: allow OpenTK to run on an offscreen GPU
// Todo: allow the user to pick a 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); var files = Directory.GetFiles(gpu_path);
foreach (var gpu in files) foreach (var gpu in files)
{ {
if (Path.GetFileName(gpu).StartsWith("card")) 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) if (test_fd >= 0)
{ {
try try
@ -91,13 +117,16 @@ namespace OpenTK.Platform.Linux
Debug.Print("[Error] No valid GPU found, bailing out."); Debug.Print("[Error] No valid GPU found, bailing out.");
throw new PlatformNotSupportedException(); throw new PlatformNotSupportedException();
} }
return fd;
} }
#region Private Members static int SetupDisplay(string gpu, out IntPtr gbm_device, out IntPtr egl_display)
int SetupDisplay(string gpu)
{ {
Debug.Print("[KMS] Attempting to use gpu '{0}'.", gpu); 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); int fd = Libc.open(gpu, OpenFlags.ReadWrite | OpenFlags.CloseOnExec);
if (fd < 0) if (fd < 0)
@ -114,20 +143,20 @@ namespace OpenTK.Platform.Linux
} }
Debug.Print("[KMS] GBM {0:x} created successfully; ", gbm_device); Debug.Print("[KMS] GBM {0:x} created successfully; ", gbm_device);
display = Egl.GetDisplay(gbm_device); egl_display = Egl.GetDisplay(gbm_device);
if (display == IntPtr.Zero) if (egl_display == IntPtr.Zero)
{ {
throw new NotSupportedException("[KMS] Failed to create EGL display"); 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; int major, minor;
if (!Egl.Initialize(display, out major, out minor)) if (!Egl.Initialize(egl_display, out major, out minor))
{ {
ErrorCode error = Egl.GetError(); ErrorCode error = Egl.GetError();
throw new NotSupportedException("[KMS] Failed to initialize EGL display. Error code: " + error); 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; return fd;
} }
@ -138,19 +167,19 @@ namespace OpenTK.Platform.Linux
protected override void Dispose(bool manual) protected override void Dispose(bool manual)
{ {
if (display != IntPtr.Zero) if (egl_display != IntPtr.Zero)
{ {
Egl.Terminate(display); Egl.Terminate(egl_display);
display = IntPtr.Zero; egl_display = IntPtr.Zero;
} }
if (gbm_device != IntPtr.Zero) if (gbm_device != IntPtr.Zero)
{ {
Gbm.DestroyDevice(gbm_device); Gbm.DestroyDevice(gbm_device);
gbm_device = IntPtr.Zero; gbm_device = IntPtr.Zero;
} }
if (fd >= 0) if (_fd >= 0)
{ {
Libc.close(fd); Libc.close(_fd);
} }
base.Dispose(manual); 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) 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() 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) 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() public override IKeyboardDriver2 CreateKeyboardDriver()
{ {
throw new NotImplementedException(); lock (this)
{
KeyboardDriver = KeyboardDriver ??
(IKeyboardDriver2)new LinuxKeyboardLibInput() ??
(IKeyboardDriver2)new LinuxKeyboardTTY();
return KeyboardDriver;
}
} }
public override IMouseDriver2 CreateMouseDriver() public override IMouseDriver2 CreateMouseDriver()