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// Copyright (c) 2009 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_MAC_H_
#define PRINTING_PDF_METAFILE_MAC_H_
#import <ApplicationServices/ApplicationServices.h>
#import <CoreFoundation/CoreFoundation.h>
#include "base/basictypes.h"
#include "base/scoped_cftyperef.h"
namespace printing {
// This class creates a graphics context that renders into a PDF data stream.
class PdfMetafile {
public:
// To create PDF data, callers should also call Init() to set up the
// rendering context.
// To create a metafile from existing Data, callers should also call
// Init(const void*, size_t).
PdfMetafile();
~PdfMetafile() {}
// Initializes a new metafile, and returns a drawing context for rendering
// into the PDF. Returns NULL on failure.
// 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 Init();
// Initializes a copy of metafile from PDF data. Returns true on success.
bool Init(const void* src_buffer, size_t src_buffer_size);
// Alias for Init, for compatibility with Emf-based code.
bool CreateFromData(const void* src_buffer, size_t src_buffer_size);
// Prepares a new pdf page with the given width and height and a scale
// factor to use for the drawing.
void StartPage(double width, double height, double scale_factor);
// Closes the current page.
void FinishPage();
// Closes the PDF file; no further rendering is allowed.
void Close();
// Returns the size of the underlying PDF data. Only valid after Close() has
// been called.
unsigned int GetDataSize() const;
// Copies the first |dst_buffer_size| bytes of the PDF data into |dst_buffer|.
// Only valid after Close() has been called.
// Returns true if the copy succeeds.
bool GetData(void* dst_buffer, size_t dst_buffer_size) const;
private:
// Context for rendering to the pdf.
scoped_cftyperef<CGContextRef> context_;
// PDF backing store.
scoped_cftyperef<CFMutableDataRef> pdf_data_;
// Whether or not a page is currently open.
bool page_is_open_;
DISALLOW_COPY_AND_ASSIGN(PdfMetafile);
};
} // namespace printing
#endif // PRINTING_PDF_METAFILE_MAC_H_
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