Changeset 15868 in vbox for trunk/src/VBox

Timestamp:

Jan 8, 2009 2:38:28 PM (16 years ago)

Author:

vboxsync

Message:

VBoxSDL framebuffer resize optimization (xTracker #3487).

Location:

trunk/src/VBox/Frontends/VBoxSDL

Files:

• Framebuffer.cpp (modified) (3 diffs)
• Framebuffer.h (modified) (1 diff)

trunk/src/VBox/Frontends/VBoxSDL/Framebuffer.cpp

@@ -116 +116 @@
     mBitsPerPixel   = 0;
     mBytesPerLine   = 0;
+    mfSameSizeRequested = false;
 #ifdef VBOX_SECURELABEL
     mLabelFont      = NULL;
@@ -477 +478 @@
     }
 
+    /*
+     * Optimize the case when the guest has changed only the VRAM ptr
+     * and the framebuffer uses the guest VRAM as the source bitmap.
+     */
+    if (   mGuestXRes    == w
+        && mGuestYRes    == h
+        && mPixelFormat  == pixelFormat
+        && mBitsPerPixel == bitsPerPixel
+        && mBytesPerLine == bytesPerLine
+        && mUsesGuestVRAM
+       )
+    {
+        mfSameSizeRequested = true;
+    }
+    else
+    {
+        mfSameSizeRequested = false;
+    }
+
     mGuestXRes   = w;
     mGuestYRes   = h;
@@ -702 +722 @@
     }
     LogFlow(("VBoxSDL:: created VRAM surface %p\n", mSurfVRAM));
+
+    if (mfSameSizeRequested && mUsesGuestVRAM)
+    {
+        /*
+         * Same size has been requested and the framebuffer still uses the guest VRAM.
+         * Reset the condition and return.
+         */
+        mfSameSizeRequested = false;
+        LogFlow(("VBoxSDL:: the same resolution requested, skipping the resize.\n"));
+        return;
+    }
 
     /* now adjust the SDL resolution */

trunk/src/VBox/Frontends/VBoxSDL/Framebuffer.h

@@ -204 +204 @@
     ULONG mPixelFormat;
     BOOL mUsesGuestVRAM;
+    BOOL mfSameSizeRequested;
 
     /** the application Icon */