printing::Metafile: Simplify OS_MACOSX-specific code path

printing/pdf_metafile_cg_mac.h

 // Copyright (c) 2012 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 PRINTING_PDF_METAFILE_CG_MAC_H_
 #define PRINTING_PDF_METAFILE_CG_MAC_H_
 
-#include <ApplicationServices/ApplicationServices.h>
-#include <CoreFoundation/CoreFoundation.h>
-#include <stdint.h>
+#include <stddef.h>
 
-#include "base/mac/scoped_cftyperef.h"
-#include "base/macros.h"
-#include "printing/metafile.h"
+#include "build/build_config.h"

[Lei Zhang, 2017/04/08 01:24:24]

Not needed?

[hal.canary, 2017/04/11 19:07:27]

I reverted most of this file.   No longer applicable.

+#include "printing/printing_export.h"
 
-namespace gfx {
-class Rect;
-class Size;
-}
+struct CGRect;
+typedef struct CGContext* CGContextRef;

[Lei Zhang, 2017/04/08 01:24:24]

Can we use "using CGContextRef = struct CGContext*;" ?

[hal.canary, 2017/04/11 19:07:27]

I reverted most of this file.   No longer applicable.

 
 namespace printing {
 
-// This class creates a graphics context that renders into a PDF data stream.
-class PRINTING_EXPORT PdfMetafileCg : public Metafile {
+class PRINTING_EXPORT PdfMetafileCg {
  public:
-  PdfMetafileCg();
-  ~PdfMetafileCg() override;
-
-  // Metafile methods.
-  bool Init() override;
-  bool InitFromData(const void* src_buffer, size_t src_buffer_size) override;
-  void StartPage(const gfx::Size& page_size,
-                 const gfx::Rect& content_area,
-                 const float& scale_factor) override;
-  bool FinishPage() override;
-  bool FinishDocument() override;
-
-  uint32_t GetDataSize() const override;
-  bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
-
-  gfx::Rect GetPageBounds(unsigned int page_number) const override;
-  unsigned int GetPageCount() const override;
-
-  // Note: The returned context *must not be retained* past Close(). If it is,
-  // the data returned from GetData will not be valid PDF data.
-  CGContextRef context() const override;
-
-  bool RenderPage(unsigned int page_number,
-                  skia::NativeDrawingContext context,
-                  const CGRect rect,
-                  const MacRenderPageParams& params) const override;
-
- private:
-  // Returns a CGPDFDocumentRef version of |pdf_data_|.
-  CGPDFDocumentRef GetPDFDocument() const;
-
-  // Context for rendering to the pdf.
-  base::ScopedCFTypeRef<CGContextRef> context_;
-
-  // PDF backing store.
-  base::ScopedCFTypeRef<CFMutableDataRef> pdf_data_;
-
-  // Lazily-created CGPDFDocument representation of |pdf_data_|.
-  mutable base::ScopedCFTypeRef<CGPDFDocumentRef> pdf_doc_;
-
-  // Whether or not a page is currently open.
-  bool page_is_open_;
-
-  DISALLOW_COPY_AND_ASSIGN(PdfMetafileCg);
+  // |shrink_to_fit| specifies whether the output should be shrunk to fit a
+  // destination page if the source PDF is bigger than the destination page in
+  // any dimension. If this is false, parts of the source PDF page that lie
+  // outside the bounds will be clipped.
+  //
+  // |stretch_to_fit| specifies whether the output should be stretched to fit
+  // the destination page if the source page size is smaller in all dimensions.
+  //
+  // |center_horizontally| specifies whether the output (after any scaling is
+  // done) should be centered horizontally within the destination page.
+  //
+  // |center_vertically| specifies whether the output (after any scaling is
+  // done) should be centered vertically within the destination page.
+  // Note that all scaling preserves the original aspect ratio of the page.
+  //
+  // |autorotate| specifies whether the source PDF should be autorotated to fit
+  // on the destination page.
+  struct RenderPageParams {
+    bool shrink_to_fit = false;
+    bool stretch_to_fit = false;
+    bool center_horizontally = false;
+    bool center_vertically = false;
+    bool autorotate = false;
+  };
+  // Renders the given page from src_buffer into |rect| in the given context.

[Lei Zhang, 2017/04/08 01:24:24]

Refer to |src_buffer| consistently like other variables.

[hal.canary, 2017/04/11 19:07:27]

Done.

+  // Pages use a 1-based index. The rendering uses the arguments in
+  // |params| to determine scaling, translation, and rotation.
+  static bool RenderPage(const void* src_buffer,

[Lei Zhang, 2017/04/08 01:24:24]

Change this to take: const std::vector& buffer, since all the callers have a
vector to pass in already?

[hal.canary, 2017/04/11 19:07:27]

Done.

+                         size_t src_buffer_size,
+                         unsigned int page_number,
+                         CGContextRef context,
+                         const CGRect rect,
+                         const RenderPageParams& params);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_CG_MAC_H_