[reactos] 07/09: [VIDEOPRT] Implement VideoPortCreateSecondaryDisplay

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=e9b5b22a8c308483d0c883...

commit e9b5b22a8c308483d0c883a2d40189df433bacad
Author:     Hervé Poussineau [e-mail]
AuthorDate: Wed Jun 23 08:54:27 2021 +0200
Commit:     Hervé Poussineau [e-mail]
CommitDate: Sat Jul 10 16:27:44 2021 +0200

[VIDEOPRT] Implement VideoPortCreateSecondaryDisplay
---
 win32ss/drivers/videoprt/videoprt.c | 40 +++++++++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/win32ss/drivers/videoprt/videoprt.c b/win32ss/drivers/videoprt/videoprt.c
index c8decdcc95d..e36e0ce6c7c 100644
--- a/win32ss/drivers/videoprt/videoprt.c
+++ b/win32ss/drivers/videoprt/videoprt.c
@@ -1350,8 +1350,44 @@ VideoPortCreateSecondaryDisplay(
     IN OUT PVOID *SecondaryDeviceExtension,
     IN ULONG Flag)
 {
-    UNIMPLEMENTED;
-    return ERROR_DEV_NOT_EXIST;
+    PDEVICE_OBJECT DeviceObject;
+    PVIDEO_PORT_DEVICE_EXTENSION FirstDeviceExtension, DeviceExtension;
+    NTSTATUS Status;
+
+    ASSERT(SecondaryDeviceExtension);
+
+    if (Flag != 0)
+    {
+        UNIMPLEMENTED;
+    }
+
+    FirstDeviceExtension = VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension);
+
+    if (FirstDeviceExtension->DisplayNumber != 0)
+    {
+        DPRINT1("Calling VideoPortCreateSecondaryDisplay for InstanceId %lu\n",
+                FirstDeviceExtension->DisplayNumber);
+    }
+
+    Status = IntVideoPortCreateAdapterDeviceObject(FirstDeviceExtension->DriverObject,
+                                                   FirstDeviceExtension->DriverExtension,
+                                                   FirstDeviceExtension->PhysicalDeviceObject,
+                                                   FirstDeviceExtension->AdapterNumber,
+                                                   FirstDeviceExtension->NumberOfSecondaryDisplays + 1,
+                                                   &DeviceObject);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("IntVideoPortCreateAdapterDeviceObject() failed with status 0x%08x\n", Status);
+        return ERROR_DEV_NOT_EXIST;
+    }
+
+    DeviceExtension = DeviceObject->DeviceExtension;
+
+    /* Increment secondary display count */
+    FirstDeviceExtension->NumberOfSecondaryDisplays++;
+
+    *SecondaryDeviceExtension = DeviceExtension->MiniPortDeviceExtension;
+    return NO_ERROR;
 }

/*