1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
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 "skia/ext/platform_device.h"
#include "ui/gfx/gdi_util.h" // EMF support
#include "ui/gfx/rect.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
|
