Reland 103021: Printing preview of a PDF on Mac with Skia only previews the last page of the PDF

skia/ext/platform_device.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKIA_EXT_PLATFORM_DEVICE_H_
 #define SKIA_EXT_PLATFORM_DEVICE_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <vector>
 #endif
 
 #include "third_party/skia/include/core/SkPreConfig.h"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 class SkMatrix;
+class SkMetaData;
 class SkPath;
 class SkRegion;
 
 struct SkIRect;
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD) || defined(OS_FREEBSD) \
     || defined(OS_SUN)
 typedef struct _cairo cairo_t;
 typedef struct _cairo_rectangle cairo_rectangle_t;
 #elif defined(OS_MACOSX)
@@ skipping 40 matching lines @@
 
 #if defined(OS_WIN)
 // Initializes the default settings and colors in a device context.
 SK_API void InitializeDC(HDC context);
 #elif defined (OS_MACOSX)
 // Returns the CGContext that backing the SkDevice.  Forwards to the bound
 // PlatformDevice.  Returns NULL if no PlatformDevice is bound.
 SK_API CGContextRef GetBitmapContext(SkDevice* device);
 #endif
 
+// Following routines are used in print preview workflow to mark the draft mode
+// metafile and preview metafile.
+SK_API SkMetaData& getMetaData(const SkCanvas& canvas);
+SK_API void SetIsDraftMode(const SkCanvas& canvas, bool draft_mode);
+SK_API bool IsDraftMode(const SkCanvas& canvas);
+
+#if defined(OS_MACOSX) || defined(OS_WIN)
+SK_API void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview);
+SK_API bool IsPreviewMetafile(const SkCanvas& canvas);
+#endif
+
 // A SkDevice is basically a wrapper around SkBitmap that provides a surface for
 // SkCanvas to draw into. PlatformDevice provides a surface Windows can also
 // write to. It also provides functionality to play well with GDI drawing
 // functions. This class is abstract and must be subclassed. It provides the
 // basic interface to implement it either with or without a bitmap backend.
 //
 // PlatformDevice provides an interface which sub-classes of SkDevice can also
 // provide to allow for drawing by the native platform into the device.
 class SK_API PlatformDevice {
  public:
@@ skipping 70 matching lines @@
 #elif defined(OS_MACOSX)
   // Loads the specified Skia transform into the device context
   static void LoadTransformToCGContext(CGContextRef context,
                                        const SkMatrix& matrix);
 #endif
 };
 
 }  // namespace skia
 
 #endif