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 16namespace content { 17 18SoftwareOutputDeviceWin::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 28SoftwareOutputDeviceWin::~SoftwareOutputDeviceWin() { 29 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 30} 31 32void SoftwareOutputDeviceWin::Resize(const gfx::Size& viewport_pixel_size, 33 float scale_factor) { 34 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 35 36 scale_factor_ = scale_factor; 37 38 if (viewport_pixel_size_ == viewport_pixel_size) 39 return; 40 41 viewport_pixel_size_ = viewport_pixel_size; 42 contents_.reset(new gfx::Canvas(viewport_pixel_size, 1.0f, true)); 43 memset(&bitmap_info_, 0, sizeof(bitmap_info_)); 44 gfx::CreateBitmapHeader(viewport_pixel_size_.width(), 45 viewport_pixel_size_.height(), 46 &bitmap_info_.bmiHeader); 47} 48 49SkCanvas* SoftwareOutputDeviceWin::BeginPaint(const gfx::Rect& damage_rect) { 50 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 51 DCHECK(contents_); 52 53 damage_rect_ = damage_rect; 54 return contents_ ? contents_->sk_canvas() : NULL; 55} 56 57void SoftwareOutputDeviceWin::EndPaint(cc::SoftwareFrameData* frame_data) { 58 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 59 DCHECK(contents_); 60 DCHECK(frame_data); 61 62 if (!contents_) 63 return; 64 65 SoftwareOutputDevice::EndPaint(frame_data); 66 67 gfx::Rect rect = damage_rect_; 68 rect.Intersect(gfx::Rect(viewport_pixel_size_)); 69 if (rect.IsEmpty()) 70 return; 71 72 SkCanvas* canvas = contents_->sk_canvas(); 73 DCHECK(canvas); 74 if (is_hwnd_composited_) { 75 RECT wr; 76 GetWindowRect(hwnd_, &wr); 77 SIZE size = {wr.right - wr.left, wr.bottom - wr.top}; 78 POINT position = {wr.left, wr.top}; 79 POINT zero = {0, 0}; 80 BLENDFUNCTION blend = {AC_SRC_OVER, 0x00, 0xFF, AC_SRC_ALPHA}; 81 82 DWORD style = GetWindowLong(hwnd_, GWL_EXSTYLE); 83 style &= ~WS_EX_COMPOSITED; 84 style |= WS_EX_LAYERED; 85 SetWindowLong(hwnd_, GWL_EXSTYLE, style); 86 87 HDC dib_dc = skia::BeginPlatformPaint(canvas); 88 ::UpdateLayeredWindow(hwnd_, NULL, &position, &size, dib_dc, &zero, 89 RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA); 90 skia::EndPlatformPaint(canvas); 91 } else { 92 HDC hdc = ::GetDC(hwnd_); 93 RECT src_rect = rect.ToRECT(); 94 skia::DrawToNativeContext(canvas, hdc, rect.x(), rect.y(), &src_rect); 95 ::ReleaseDC(hwnd_, hdc); 96 } 97} 98 99void SoftwareOutputDeviceWin::CopyToPixels(const gfx::Rect& rect, 100 void* pixels) { 101 DCHECK(contents_); 102 SkImageInfo info = SkImageInfo::MakeN32Premul(rect.width(), rect.height()); 103 contents_->sk_canvas()->readPixels( 104 info, pixels, info.minRowBytes(), rect.x(), rect.y()); 105} 106 107} // namespace content 108