Added methods to create and read from file-backed metafiles to the Windows Emf class.

BUG=None
TEST=Unittests

Review URL: http://codereview.chromium.org/3538003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60994 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 0 deletions

diff --git a/printing/emf_win.cc b/printing/emf_win.cc
index aa1832b..de3b7db 100644
--- a/printing/emf_win.cc
+++ b/printing/emf_win.cc
@@ -4,6 +4,7 @@
 
 #include "printing/emf_win.h"
 
+#include "base/file_path.h"
 #include "base/histogram.h"
 #include "base/logging.h"
 #include "base/scoped_ptr.h"
@@ -60,6 +61,16 @@ bool Emf::CreateDc(HDC sibling, const RECT* rect) {
   return hdc_ != NULL;
 }
 
+bool Emf::CreateFileBackedDc(HDC sibling, const RECT* rect,
+                             const FilePath& path) {
+  DCHECK(!emf_ && !hdc_);
+  DCHECK(!path.empty());
+  hdc_ = CreateEnhMetaFile(sibling, path.value().c_str(), rect, NULL);
+  DCHECK(hdc_);
+  return hdc_ != NULL;
+}
+
+
 bool Emf::CreateFromData(const void* buffer, uint32 size) {
   DCHECK(!emf_ && !hdc_);
   emf_ = SetEnhMetaFileBits(size, reinterpret_cast<const BYTE*>(buffer));
@@ -67,6 +78,14 @@ bool Emf::CreateFromData(const void* buffer, uint32 size) {
   return emf_ != NULL;
 }
 
+bool Emf::CreateFromFile(const FilePath& metafile_path) {
+  DCHECK(!emf_ && !hdc_);
+  emf_ = GetEnhMetaFile(metafile_path.value().c_str());
+  DCHECK(emf_);
+  return emf_ != NULL;
+}
+
+
 bool Emf::CloseDc() {
   DCHECK(!emf_ && hdc_);
   emf_ = CloseEnhMetaFile(hdc_);