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 #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(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 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 104
