add new API for gdi fonts (not hooked up yet)

git-svn-id: http://skia.googlecode.com/svn/trunk@8253 2bbb7eff-a529-9590-31e7-b0007b416f81

include/ports/SkTypeface_win.h

@@ -28,4 +28,12 @@ SK_API SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&);
  */
 SK_API void SkLOGFONTFromTypeface(const SkTypeface* typeface, LOGFONT* lf);
 
+/**
+  *  Set an optional callback to ensure that the data behind a LOGFONT is loaded.
+  *  This will get called if Skia tries to access the data but hits a failure.
+  *  Normally this is null, and is only required if the font data needs to be
+  *  remotely (re)loaded.
+  */
+SK_API void SkTypeface_SetEnsureLOGFONTAccessibleProc(void (*)(const LOGFONT&));
+
 #endif

src/ports/SkFontHost_win.cpp

@@ -29,6 +29,12 @@
 #include <usp10.h>
 #include <objbase.h>
 
+static void (*gEnsureLOGFONTAccessibleProc)(const LOGFONT&);
+
+void SkTypeface_SetEnsureLOGFONTAccessibleProc(void (*proc)(const LOGFONT&)) {
+    gEnsureLOGFONTAccessibleProc = proc;
+}
+
 // always packed xxRRGGBB
 typedef uint32_t SkGdiRGB;