printing/image_mac.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/image.h"
   6
   7 #include <ApplicationServices/ApplicationServices.h>
   8
   9 #include "base/mac/scoped_cftyperef.h"
  10 #include "printing/metafile.h"
  11 #include "ui/gfx/rect.h"
  12
  13 namespace printing {
  14
  15 bool Image::LoadMetafile(const Metafile& metafile) {
  16   // The printing system uses single-page metafiles (page indexes are 1-based).
  17   const unsigned int page_number = 1;
  18   gfx::Rect rect(metafile.GetPageBounds(page_number));
  19   if (rect.width() < 1 || rect.height() < 1)
  20     return false;
  21
  22   size_ = rect.size();
  23   row_length_ = size_.width() * sizeof(uint32);
  24   size_t bytes = row_length_ * size_.height();
  25   DCHECK(bytes);
  26
  27   data_.resize(bytes);
  28   base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
  29       CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB));
  30   base::ScopedCFTypeRef<CGContextRef> bitmap_context(
  31       CGBitmapContextCreate(&*data_.begin(),
  32                             size_.width(),
  33                             size_.height(),
  34                             8,
  35                             row_length_,
  36                             color_space,
  37                             kCGImageAlphaPremultipliedLast));
  38   DCHECK(bitmap_context.get());
  39
  40   struct Metafile::MacRenderPageParams params;
  41   params.shrink_to_fit = true;
  42   metafile.RenderPage(page_number, bitmap_context,
  43                       CGRectMake(0, 0, size_.width(), size_.height()), params);
  44
  45   return true;
  46 }
  47
  48 }  // namespace printing