1 // Copyright 2013 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/aura/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 15 namespace content { 16 17 SoftwareOutputDeviceWin::SoftwareOutputDeviceWin(ui::Compositor* compositor) 18 : hwnd_(compositor->widget()), 19 is_hwnd_composited_(false) { 20 // TODO(skaslev) Remove this when crbug.com/180702 is fixed. 21 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 22 23 LONG style = GetWindowLong(hwnd_, GWL_EXSTYLE); 24 is_hwnd_composited_ = !!(style & WS_EX_COMPOSITED); 25 } 26 27 SoftwareOutputDeviceWin::~SoftwareOutputDeviceWin() { 28 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 29 } 30 31 void SoftwareOutputDeviceWin::Resize(gfx::Size viewport_size) { 32 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 33 34 if (viewport_size_ == viewport_size) 35 return; 36 37 viewport_size_ = viewport_size; 38 contents_.reset(new gfx::Canvas(viewport_size, ui::SCALE_FACTOR_100P, false)); 39 memset(&bitmap_info_, 0, sizeof(bitmap_info_)); 40 gfx::CreateBitmapHeader(viewport_size_.width(), viewport_size_.height(), 41 &bitmap_info_.bmiHeader); 42 } 43 44 SkCanvas* SoftwareOutputDeviceWin::BeginPaint(gfx::Rect damage_rect) { 45 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 46 DCHECK(contents_); 47 48 damage_rect_ = damage_rect; 49 return contents_ ? contents_->sk_canvas() : NULL; 50 } 51 52 void SoftwareOutputDeviceWin::EndPaint(cc::SoftwareFrameData* frame_data) { 53 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 54 DCHECK(contents_); 55 DCHECK(frame_data); 56 57 if (!contents_) 58 return; 59 60 SoftwareOutputDevice::EndPaint(frame_data); 61 62 gfx::Rect rect = damage_rect_; 63 rect.Intersect(gfx::Rect(viewport_size_)); 64 if (rect.IsEmpty()) 65 return; 66 67 SkCanvas* canvas = contents_->sk_canvas(); 68 DCHECK(canvas); 69 if (is_hwnd_composited_) { 70 RECT wr; 71 GetWindowRect(hwnd_, &wr); 72 SIZE size = {wr.right - wr.left, wr.bottom - wr.top}; 73 POINT position = {wr.left, wr.top}; 74 POINT zero = {0, 0}; 75 BLENDFUNCTION blend = {AC_SRC_OVER, 0x00, 0xFF, AC_SRC_ALPHA}; 76 77 DWORD style = GetWindowLong(hwnd_, GWL_EXSTYLE); 78 style &= ~WS_EX_COMPOSITED; 79 style |= WS_EX_LAYERED; 80 SetWindowLong(hwnd_, GWL_EXSTYLE, style); 81 82 HDC dib_dc = skia::BeginPlatformPaint(canvas); 83 ::UpdateLayeredWindow(hwnd_, NULL, &position, &size, dib_dc, &zero, 84 RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA); 85 skia::EndPlatformPaint(canvas); 86 } else { 87 SkDevice* device = canvas->getDevice(); 88 const SkBitmap& bitmap = device->accessBitmap(false); 89 HDC hdc = ::GetDC(hwnd_); 90 gfx::StretchDIBits(hdc, 91 rect.x(), rect.y(), 92 rect.width(), rect.height(), 93 rect.x(), rect.y(), 94 rect.width(), rect.height(), 95 bitmap.getPixels(), 96 &bitmap_info_); 97 ::ReleaseDC(hwnd_, hdc); 98 } 99 } 100 101 } // namespace content 102
