1 // Copyright (c) 2011 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.
5 #include "printing/image.h"
10 #include "base/macros.h"
11 #include "base/win/scoped_gdi_object.h"
12 #include "base/win/scoped_hdc.h"
13 #include "base/win/scoped_select_object.h"
14 #include "printing/metafile.h"
15 #include "skia/ext/skia_utils_win.h"
16 #include "ui/gfx/gdi_util.h" // EMF support
17 #include "ui/gfx/geometry/rect.h"
22 // A simple class which temporarily overrides system settings.
23 // The bitmap image rendered via the PlayEnhMetaFile() function depends on
24 // some system settings.
25 // As a workaround for such dependency, this class saves the system settings
26 // and changes them. This class also restore the saved settings in its
28 class DisableFontSmoothing {
30 DisableFontSmoothing() : enable_again_(false) {
32 if (SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &enabled, 0) &&
34 if (SystemParametersInfo(SPI_SETFONTSMOOTHING, FALSE, NULL, 0))
39 ~DisableFontSmoothing() {
41 BOOL result = SystemParametersInfo(SPI_SETFONTSMOOTHING, TRUE, NULL, 0);
49 DISALLOW_COPY_AND_ASSIGN(DisableFontSmoothing);
56 bool Image::LoadMetafile(const Metafile& metafile) {
57 gfx::Rect rect(metafile.GetPageBounds(1));
58 DisableFontSmoothing disable_in_this_scope;
60 // Create a temporary HDC and bitmap to retrieve the rendered data.
61 base::win::ScopedCreateDC hdc(::CreateCompatibleDC(NULL));
63 DCHECK_EQ(rect.x(), 0);
64 DCHECK_EQ(rect.y(), 0);
65 DCHECK_GE(rect.width(), 0); // Metafile could be empty.
66 DCHECK_GE(rect.height(), 0);
68 if (rect.width() < 1 || rect.height() < 1)
72 gfx::CreateBitmapV4Header(rect.width(), rect.height(), &hdr);
73 unsigned char* bits = NULL;
74 base::win::ScopedBitmap bitmap(
75 ::CreateDIBSection(hdc.Get(), reinterpret_cast<BITMAPINFO*>(&hdr), 0,
76 reinterpret_cast<void**>(&bits), NULL, 0));
77 DCHECK(bitmap.is_valid());
78 base::win::ScopedSelectObject select_object(hdc.Get(), bitmap.get());
80 skia::InitializeDC(hdc.Get());
82 bool success = metafile.Playback(hdc.Get(), NULL);
84 row_length_ = size_.width() * sizeof(uint32_t);
85 size_t bytes = row_length_ * size_.height();
88 data_.assign(bits, bits + bytes);
93 } // namespace printing