Changeset 33264 in vbox for trunk/src/VBox/Additions/WINNT/Graphics/Miniport

Timestamp:

Oct 20, 2010 2:29:45 PM (14 years ago)

Author:

vboxsync

Message:

Additions/Win: Allow any horizontal resolution if graphics device supports it.

Location:

trunk/src/VBox/Additions/WINNT/Graphics/Miniport

Files:

• VBoxVideo.cpp (modified) (3 diffs)
• VBoxVideo.h (modified) (2 diffs)

trunk/src/VBox/Additions/WINNT/Graphics/Miniport/VBoxVideo.cpp

@@ -764 +764 @@
             break;
 
-        /* round down width to be a multiple of 8 */
-        xres &= 0xFFF8;
+        /* round down width to be a multiple of 8 if necessary */
+        if (!DeviceExtension->fAnyX)
+            xres &= 0xFFF8;
 
         /* second test: does it fit within our VRAM? */
@@ -976 +977 @@
 #endif /* VBOX_WITH_MULTIMONITOR_FIX */
         }
-        /* round down to multiple of 8 */
-        if ((xres & 0xfff8) != xres)
-            dprintf(("VBoxVideo: rounding down xres from %d to %d\n", xres, xres & 0xfff8));
-        xres &= 0xfff8;
+        /* round down to multiple of 8 if necessary */
+        if (!DeviceExtension->fAnyX) {
+            if ((xres & 0xfff8) != xres)
+                dprintf(("VBoxVideo: rounding down xres from %d to %d\n", xres, xres & 0xfff8));
+            xres &= 0xfff8;
+        }
         /* take the current values for the fields that are not set */
 #ifndef VBOX_WITH_WDDM
@@ -1735 +1738 @@
 
     PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION)HwDeviceExtension;
+    USHORT DispiId;
 
     /* Initialize the request pointer. */
     pDevExt->u.primary.pvReqFlush = NULL;
 
+    /* Check if the chip restricts horizontal resolution or not. */
+    VideoPortWritePortUshort((PUSHORT)VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID);
+    VideoPortWritePortUshort((PUSHORT)VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_ANYX);
+    DispiId = VideoPortReadPortUshort((PUSHORT)VBE_DISPI_IOPORT_DATA);
+    if (DispiId == VBE_DISPI_ID_ANYX)
+        pDevExt->fAnyX = TRUE;
+    else
+        pDevExt->fAnyX = FALSE;
+    
     vboxVideoInitCustomVideoModes(pDevExt);
 

trunk/src/VBox/Additions/WINNT/Graphics/Miniport/VBoxVideo.h

@@ -95 +95 @@
 #define VBE_DISPI_ID_VBOX_VIDEO         0xBE00
 #define VBE_DISPI_ID_HGSMI              0xBE01
+#define VBE_DISPI_ID_ANYX               0xBE02
 #define VBE_DISPI_DISABLED              0x00
 #define VBE_DISPI_ENABLED               0x01
@@ -332 +333 @@
    VBOXWDDM_TARGET aTargets[VBOX_VIDEO_MAX_SCREENS];
 #endif
+   BOOLEAN fAnyX;   /* Unrestricted horizontal resolution flag. */
 } DEVICE_EXTENSION, *PDEVICE_EXTENSION;