1 files changed, 93 insertions, 0 deletions
diff --git a/widget/windows/nsImageClipboard.h b/widget/windows/nsImageClipboard.h
new file mode 100644
index 000000000..25b33cc56
--- /dev/null
+++ b/widget/windows/nsImageClipboard.h
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsImageClipboard_h
+#define nsImageClipboard_h
+
+/* Things To Do 11/8/00
+
+Check image metrics, can we support them? Do we need to?
+Any other render format? HTML?
+
+*/
+
+#include "nsError.h"
+#include <windows.h>
+
+#include "nsCOMPtr.h"
+#include "imgIContainer.h"
+#include "nsIInputStream.h"
+
+
+//
+// nsImageToClipboard
+//
+// A utility class that takes an imgIContainer and does all the bitmap magic
+// to allow us to put it on the clipboard
+//
+class nsImageToClipboard
+{
+public:
+  nsImageToClipboard(imgIContainer* aInImage, bool aWantDIBV5 = true);
+  ~nsImageToClipboard();
+
+    // Call to get the actual bits that go on the clipboard. If |nullptr|, the
+    // setup operations have failed.
+    //
+    // NOTE: The caller owns the handle and must delete it with ::GlobalRelease()
+  nsresult GetPicture ( HANDLE* outBits ) ;
+
+private:
+
+    // Computes # of bytes needed by a bitmap with the specified attributes.
+  int32_t CalcSize(int32_t aHeight, int32_t aColors, WORD aBitsPerPixel, int32_t aSpanBytes);
+  int32_t CalcSpanLength(uint32_t aWidth, uint32_t aBitCount);
+
+    // Do the work
+  nsresult CreateFromImage ( imgIContainer* inImage, HANDLE* outBitmap );
+
+  nsCOMPtr<imgIContainer> mImage;            // the image we're working with
+  bool mWantDIBV5;
+
+}; // class nsImageToClipboard
+
+
+struct bitFields {
+    uint32_t red;
+    uint32_t green;
+    uint32_t blue;
+    uint8_t redLeftShift;
+    uint8_t redRightShift;
+    uint8_t greenLeftShift;
+    uint8_t greenRightShift;
+    uint8_t blueLeftShift;
+    uint8_t blueRightShift;
+};
+
+//
+// nsImageFromClipboard
+//
+// A utility class that takes a DIB from the win32 clipboard and does
+// all the bitmap magic to convert it to a PNG or a JPEG in the form of a nsIInputStream
+//
+class nsImageFromClipboard
+{
+public:
+  nsImageFromClipboard () ;
+  ~nsImageFromClipboard ( ) ;
+  
+    // Retrieve the newly created image
+  nsresult GetEncodedImageStream (unsigned char * aClipboardData, const char * aMIMEFormat, nsIInputStream** outImage);
+
+private:
+
+  void InvertRows(unsigned char * aInitialBuffer, uint32_t aSizeOfBuffer, uint32_t aNumBytesPerRow);
+  nsresult ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer);
+  void CalcBitmask(uint32_t aMask, uint8_t& aBegin, uint8_t& aLength);
+  void CalcBitShift(bitFields * aColorMask);
+
+}; // nsImageFromClipboard
+
+#endif