From b29c883fb46ac6099440d82ac57b86d25386daed Mon Sep 17 00:00:00 2001
From: "bungeman@google.com"
 <bungeman@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81>
Date: Mon, 10 Oct 2011 13:19:10 +0000
Subject: Add xps device to skia. http://codereview.appspot.com/5076041/

git-svn-id: http://skia.googlecode.com/svn/trunk@2437 2bbb7eff-a529-9590-31e7-b0007b416f81
---
 include/utils/win/SkHRESULT.h       | 50 +++++++++++++++++++++++++++++++++++++
 include/utils/win/SkTScopedComPtr.h | 25 +++++++++++++++++--
 2 files changed, 73 insertions(+), 2 deletions(-)
 create mode 100644 include/utils/win/SkHRESULT.h

(limited to 'include/utils/win')

diff --git a/include/utils/win/SkHRESULT.h b/include/utils/win/SkHRESULT.h
new file mode 100644
index 0000000000..ff596c71a9
--- /dev/null
+++ b/include/utils/win/SkHRESULT.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkHRESULT_DEFINED
+#define SkHRESULT_DEFINED
+
+#include "SkTypes.h"
+
+void SkTraceHR(const char* file, unsigned long line,
+               HRESULT hr, const char* msg);
+
+#ifdef SK_DEBUG
+#define SK_TRACEHR(_hr, _msg) SkTraceHR(__FILE__, __LINE__, _hr, _msg)
+#else
+#define SK_TRACEHR(_hr, _msg) _hr
+#endif
+
+#define HR_GENERAL(_ex, _msg, _ret) {\
+    HRESULT _hr = _ex;\
+    if (FAILED(_hr)) {\
+        SK_TRACEHR(_hr, _msg);\
+        return _ret;\
+    }\
+}
+
+//@{
+/**
+These macros are for reporting HRESULT errors.
+The expression will be evaluated.
+If the resulting HRESULT SUCCEEDED then execution will continue normally.
+If the HRESULT FAILED then the macro will return from the current function.
+In variants ending with 'M' the given message will be traced when FAILED.
+The HR variants will return the HRESULT when FAILED.
+The HRB variants will return false when FAILED.
+The HRV variants will simply return when FAILED.
+*/
+#define HR(ex) HR_GENERAL(ex, NULL, _hr)
+#define HRM(ex, msg) HR_GENERAL(ex, msg, _hr)
+
+#define HRB(ex) HR_GENERAL(ex, NULL, false)
+#define HRBM(ex, msg) HR_GENERAL(ex, msg, false)
+
+#define HRV(ex) HR_GENERAL(ex, NULL, )
+#define HRVM(ex, msg) HR_GENERAL(ex, msg, )
+//@}
+#endif
diff --git a/include/utils/win/SkTScopedComPtr.h b/include/utils/win/SkTScopedComPtr.h
index e0d1634cb8..b9be037d8b 100644
--- a/include/utils/win/SkTScopedComPtr.h
+++ b/include/utils/win/SkTScopedComPtr.h
@@ -6,12 +6,19 @@
  * found in the LICENSE file.
  */
 
-
 #ifndef SkSkTScopedPtr_DEFINED
 #define SkSkTScopedPtr_DEFINED
 
+#include "SkTypes.h"
 #include "SkTemplates.h"
 
+template<typename T>
+class SkBlockComRef : public T {
+private:
+    virtual ULONG STDMETHODCALLTYPE AddRef(void) = 0;
+    virtual ULONG STDMETHODCALLTYPE Release(void) = 0;
+};
+
 template<typename T>
 class SkTScopedComPtr : SkNoncopyable {
 private:
@@ -23,7 +30,9 @@ public:
         this->reset();
     }
     T &operator*() const { return *fPtr; }
-    T *operator->() const { return fPtr; }
+    SkBlockComRef<T> *operator->() const {
+        return static_cast<SkBlockComRef<T>*>(fPtr);
+    }
     /**
      * Returns the address of the underlying pointer.
      * This is dangerous -- it breaks encapsulation and the reference escapes.
@@ -38,6 +47,18 @@ public:
             this->fPtr = NULL;
         }
     }
+    
+    void swap(SkTScopedComPtr<T>& that) {
+        T* temp = this->fPtr;
+        this->fPtr = that.fPtr;
+        that.fPtr = temp;
+    }
+    
+    T* release() {
+        T* temp = this->fPtr;
+        this->fPtr = NULL;
+        return temp;
+    }
 };
 
 #endif
-- 
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