Printing: Split off Win/Mac implementations of the Image class into their own
files.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3966002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@63316 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/printing/image_win.cc b/printing/image_win.cc
new file mode 100644
index 0000000..e8bd368
--- /dev/null
+++ b/printing/image_win.cc
@@ -0,0 +1,88 @@
+// Copyright (c) 2010 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 "gfx/gdi_util.h" // EMF support
+#include "gfx/rect.h"
+#include "skia/ext/platform_device.h"
+
+namespace {
+
+// A simple class which temporarily overrides system settings.
+// The bitmap image rendered via the PlayEnhMetaFile() function depends on
+// some system settings.
+// As a workaround for such dependency, this class saves the system settings
+// and changes them. This class also restore the saved settings in its
+// destructor.
+class DisableFontSmoothing {
+ public:
+ explicit DisableFontSmoothing() : enable_again_(false) {
+ BOOL enabled;
+ if (SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &enabled, 0) &&
+ enabled) {
+ if (SystemParametersInfo(SPI_SETFONTSMOOTHING, FALSE, NULL, 0))
+ enable_again_ = true;
+ }
+ }
+
+ ~DisableFontSmoothing() {
+ if (enable_again_) {
+ BOOL result = SystemParametersInfo(SPI_SETFONTSMOOTHING, TRUE, NULL, 0);
+ DCHECK(result);
+ }
+ }
+
+ private:
+ bool enable_again_;
+
+ DISALLOW_COPY_AND_ASSIGN(DisableFontSmoothing);
+};
+
+} // namespace
+
+namespace printing {
+
+bool Image::LoadMetafile(const NativeMetafile& metafile) {
+ gfx::Rect rect(metafile.GetBounds());
+ DisableFontSmoothing disable_in_this_scope;
+
+ // Create a temporary HDC and bitmap to retrieve the rendered data.
+ HDC 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);
+ void* bits;
+ HBITMAP bitmap = CreateDIBSection(hdc,
+ reinterpret_cast<BITMAPINFO*>(&hdr), 0,
+ &bits, NULL, 0);
+ DCHECK(bitmap);
+ DCHECK(SelectObject(hdc, bitmap));
+
+ skia::PlatformDevice::InitializeDC(hdc);
+
+ bool success = metafile.Playback(hdc, NULL);
+
+ row_length_ = size_.width() * sizeof(uint32);
+ size_t bytes = row_length_ * size_.height();
+ DCHECK(bytes);
+
+ data_.resize(bytes);
+ memcpy(&*data_.begin(), bits, bytes);
+
+ DeleteDC(hdc);
+ DeleteObject(bitmap);
+
+ return success;
+}
+
+} // namespace printing
