Changeset 38207 in vbox for trunk/src/VBox/Additions/common

Timestamp:

Jul 27, 2011 9:56:28 PM (14 years ago)

Author:

vboxsync

Message:

Additions/VBoxVideo: move a couple of functions from the X.Org driver to the common code

File:

• trunk/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp (modified) (3 diffs)

trunk/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp

@@ -6 +6 @@
 
 /*
- * Copyright (C) 2006-2010 Oracle Corporation
+ * Copyright (C) 2006-2011 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -43 +43 @@
         cDisplays = 1;
     return cDisplays;
+}
+
+
+/**
+ * Returns the size of the video RAM in bytes.
+ *
+ * @returns the size
+ */
+RTDECL(uint32_t) VBoxVideoGetVRAMSize(void)
+{
+    /** @note A 32bit read on this port returns the VRAM size. */
+    return VBoxVideoCmnPortReadUlong(VBE_DISPI_IOPORT_DATA);
+}
+
+
+/**
+ * Check whether this hardware allows the display width to have non-multiple-
+ * of-eight values.
+ *
+ * @returns true if any width is allowed, false otherwise.
+ */
+RTDECL(bool) VBoxVideoAnyWidthAllowed(void)
+{
+    unsigned DispiId;
+    VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID);
+    VBoxVideoCmnPortWriteUshort(VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_ANYX);
+    DispiId = VBoxVideoCmnPortReadUshort(VBE_DISPI_IOPORT_DATA);
+    return (DispiId == VBE_DISPI_ID_ANYX);
 }
 
@@ -180 +208 @@
 
 /**
- * Get the video mode for the first screen using the port registers.  All
- * parameters are optional
- * @note  If anyone else needs additional values just extend the function with
- *        additional parameters and fix any existing callers.
- * @param  pcWidth      where to store the mode width
- * @param  pcHeight     where to store the mode height
- * @param  pcVirtWidth  where to store the mode pitch
- * @param  pcBPP        where to store the colour depth of the mode
- * @param  pfFlags      where to store the flags for the mode
+ * Disable our extended graphics mode and go back to VGA mode.
  */
 RTDECL(void) VBoxVideoDisableVBE(void)