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1 // Copyright 2014 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 "content/browser/compositor/software_output_device_win.h" | |
6 | |
7 #include "content/public/browser/browser_thread.h" | |
8 #include "third_party/skia/include/core/SkBitmap.h" | |
9 #include "third_party/skia/include/core/SkDevice.h" | |
10 #include "ui/compositor/compositor.h" | |
11 #include "ui/gfx/canvas.h" | |
12 #include "ui/gfx/canvas_skia_paint.h" | |
13 #include "ui/gfx/gdi_util.h" | |
14 #include "ui/gfx/skia_util.h" | |
15 | |
16 namespace content { | |
17 | |
18 SoftwareOutputDeviceWin::SoftwareOutputDeviceWin(ui::Compositor* compositor) | |
19 : hwnd_(compositor->widget()), | |
20 is_hwnd_composited_(false) { | |
21 // TODO(skaslev) Remove this when crbug.com/180702 is fixed. | |
22 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
23 | |
24 LONG style = GetWindowLong(hwnd_, GWL_EXSTYLE); | |
25 is_hwnd_composited_ = !!(style & WS_EX_COMPOSITED); | |
26 } | |
27 | |
28 SoftwareOutputDeviceWin::~SoftwareOutputDeviceWin() { | |
29 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
30 } | |
31 | |
32 void SoftwareOutputDeviceWin::Resize(gfx::Size viewport_size) { | |
33 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
34 | |
35 if (viewport_size_ == viewport_size) | |
36 return; | |
37 | |
38 viewport_size_ = viewport_size; | |
39 contents_.reset(new gfx::Canvas(viewport_size, 1.0f, true)); | |
40 memset(&bitmap_info_, 0, sizeof(bitmap_info_)); | |
41 gfx::CreateBitmapHeader(viewport_size_.width(), viewport_size_.height(), | |
42 &bitmap_info_.bmiHeader); | |
43 } | |
44 | |
45 SkCanvas* SoftwareOutputDeviceWin::BeginPaint(const gfx::Rect& damage_rect) { | |
46 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
47 DCHECK(contents_); | |
48 | |
49 damage_rect_ = damage_rect; | |
50 return contents_ ? contents_->sk_canvas() : NULL; | |
51 } | |
52 | |
53 void SoftwareOutputDeviceWin::EndPaint(cc::SoftwareFrameData* frame_data) { | |
54 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
55 DCHECK(contents_); | |
56 DCHECK(frame_data); | |
57 | |
58 if (!contents_) | |
59 return; | |
60 | |
61 SoftwareOutputDevice::EndPaint(frame_data); | |
62 | |
63 gfx::Rect rect = damage_rect_; | |
64 rect.Intersect(gfx::Rect(viewport_size_)); | |
65 if (rect.IsEmpty()) | |
66 return; | |
67 | |
68 SkCanvas* canvas = contents_->sk_canvas(); | |
69 DCHECK(canvas); | |
70 if (is_hwnd_composited_) { | |
71 RECT wr; | |
72 GetWindowRect(hwnd_, &wr); | |
73 SIZE size = {wr.right - wr.left, wr.bottom - wr.top}; | |
74 POINT position = {wr.left, wr.top}; | |
75 POINT zero = {0, 0}; | |
76 BLENDFUNCTION blend = {AC_SRC_OVER, 0x00, 0xFF, AC_SRC_ALPHA}; | |
77 | |
78 DWORD style = GetWindowLong(hwnd_, GWL_EXSTYLE); | |
79 style &= ~WS_EX_COMPOSITED; | |
80 style |= WS_EX_LAYERED; | |
81 SetWindowLong(hwnd_, GWL_EXSTYLE, style); | |
82 | |
83 HDC dib_dc = skia::BeginPlatformPaint(canvas); | |
84 ::UpdateLayeredWindow(hwnd_, NULL, &position, &size, dib_dc, &zero, | |
85 RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA); | |
86 skia::EndPlatformPaint(canvas); | |
87 } else { | |
88 HDC hdc = ::GetDC(hwnd_); | |
89 RECT src_rect = rect.ToRECT(); | |
90 skia::DrawToNativeContext(canvas, hdc, rect.x(), rect.y(), &src_rect); | |
91 ::ReleaseDC(hwnd_, hdc); | |
92 } | |
93 } | |
94 | |
95 void SoftwareOutputDeviceWin::CopyToBitmap( | |
96 const gfx::Rect& rect, SkBitmap* output) { | |
97 DCHECK(contents_); | |
98 SkBaseDevice* device = contents_->sk_canvas()->getDevice(); | |
99 const SkBitmap& bitmap = device->accessBitmap(false); | |
100 bitmap.extractSubset(output, gfx::RectToSkIRect(rect)); | |
101 } | |
102 | |
103 } // namespace content | |
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