text: // 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.
  
  #include "printing/image.h"
  
  #include <stddef.h>
  #include <stdint.h>
  
  #include "base/macros.h"
  #include "base/win/scoped_gdi_object.h"
  #include "base/win/scoped_hdc.h"
  #include "base/win/scoped_select_object.h"
  #include "printing/metafile.h"
  #include "skia/ext/skia_utils_win.h"
  #include "ui/gfx/gdi_util.h"  // EMF support
  #include "ui/gfx/geometry/rect.h"
  
  namespace printing {
  
  bool Image::LoadMetafile(const Metafile& metafile) {
    gfx::Rect rect(metafile.GetPageBounds(1));
  
    // Create a temporary HDC and bitmap to retrieve the rendered data.
    base::win::ScopedCreateDC hdc(::CreateCompatibleDC(NULL));
    BITMAPV4HEADER hdr;
    DCHECK_EQ(rect.x(), 0);
    DCHECK_EQ(rect.y(), 0);
    DCHECK_GE(rect.width(), 0);  // Metafile could be empty.
    DCHECK_GE(rect.height(), 0);
  
    if (rect.width() < 1 || rect.height() < 1)
      return false;
  
    size_ = rect.size();
    gfx::CreateBitmapV4Header(rect.width(), rect.height(), &hdr);
    unsigned char* bits = NULL;
    base::win::ScopedBitmap bitmap(
        ::CreateDIBSection(hdc.Get(), reinterpret_cast<BITMAPINFO*>(&hdr), 0,
                           reinterpret_cast<void**>(&bits), NULL, 0));
    DCHECK(bitmap.is_valid());
    base::win::ScopedSelectObject select_object(hdc.Get(), bitmap.get());
  
    skia::InitializeDC(hdc.Get());
  
    bool success = metafile.Playback(hdc.Get(), NULL);
  
    row_length_ = size_.width() * sizeof(uint32_t);
    size_t bytes = row_length_ * size_.height();
    DCHECK(bytes);
  
    data_.assign(bits, bits + bytes);
  
    return success;
  }
  
  }  // namespace printing
  