Changeset 63822 in vbox for trunk/src/VBox/Devices

Timestamp:

Sep 14, 2016 6:18:20 AM (8 years ago)

Author:

vboxsync

Message:

include,Main,DevVGA: bugref:8387: support for guest request to blank the virtual monitor (VBVA_SCREEN_F_BLANK2)

Location:

trunk/src/VBox/Devices/Graphics

Files:

• DevVGA_VBVA.cpp (modified) (1 diff)
• DevVGA_VDMA.cpp (modified) (3 diffs)

trunk/src/VBox/Devices/Graphics/DevVGA_VBVA.cpp

@@ -2137 +2137 @@
     else if (u32Index == VBOX_VBVA_CONF32_SCREEN_FLAGS)
     {
-        pConf32->u32Value = VBVA_SCREEN_F_ACTIVE | VBVA_SCREEN_F_DISABLED | VBVA_SCREEN_F_BLANK;
+        pConf32->u32Value =  VBVA_SCREEN_F_ACTIVE
+                           | VBVA_SCREEN_F_DISABLED
+                           | VBVA_SCREEN_F_BLANK
+                           | VBVA_SCREEN_F_BLANK2;
     }
     else if (u32Index == VBOX_VBVA_CONF32_MAX_RECORD_SIZE)

trunk/src/VBox/Devices/Graphics/DevVGA_VDMA.cpp

@@ -1476 +1476 @@
 {
     const uint32_t u32ViewIndex = pScreen->u32ViewIndex;
-    const bool fDisabled = RT_BOOL(pScreen->u16Flags & VBVA_SCREEN_F_DISABLED);
-
-    if (fDisabled)
+    const uint16_t u16Flags = pScreen->u16Flags;
+
+    if (u16Flags & VBVA_SCREEN_F_DISABLED)
     {
         if (   u32ViewIndex < pVGAState->cMonitors
@@ -1491 +1491 @@
     else
     {
+        if (u16Flags & VBVA_SCREEN_F_BLANK2)
+        {
+            /* Special case for blanking using current video mode.
+             * Only 'u16Flags' field is relevant.
+             */
+            RT_ZERO(*pScreen);
+            pScreen->u16Flags = u16Flags;
+            return VINF_SUCCESS;
+        }
+
         if (   u32ViewIndex < pVGAState->cMonitors
             && pScreen->u16BitsPerPixel <= 32
@@ -1561 +1571 @@
             continue;
 
-        if (!fDisable || !CurView.u32ViewSize)
+        /* The view does not change if _BLANK2 is set. */
+        if (   (!fDisable || !CurView.u32ViewSize)
+            && !RT_BOOL(Screen.u16Flags & VBVA_SCREEN_F_BLANK2))
         {
             View.u32ViewIndex = Screen.u32ViewIndex;