1 files changed, 107 insertions, 0 deletions
diff --git a/chromium/content/browser/compositor/software_output_device_win.cc b/chromium/content/browser/compositor/software_output_device_win.cc
new file mode 100644
index 00000000000..1a6b5f64b40
--- /dev/null
+++ b/chromium/content/browser/compositor/software_output_device_win.cc
@@ -0,0 +1,107 @@
+// Copyright 2014 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 "content/browser/compositor/software_output_device_win.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkDevice.h"
+#include "ui/compositor/compositor.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/canvas_skia_paint.h"
+#include "ui/gfx/gdi_util.h"
+#include "ui/gfx/skia_util.h"
+
+namespace content {
+
+SoftwareOutputDeviceWin::SoftwareOutputDeviceWin(ui::Compositor* compositor)
+    : hwnd_(compositor->widget()),
+      is_hwnd_composited_(false) {
+  // TODO(skaslev) Remove this when crbug.com/180702 is fixed.
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  LONG style = GetWindowLong(hwnd_, GWL_EXSTYLE);
+  is_hwnd_composited_ = !!(style & WS_EX_COMPOSITED);
+}
+
+SoftwareOutputDeviceWin::~SoftwareOutputDeviceWin() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+}
+
+void SoftwareOutputDeviceWin::Resize(const gfx::Size& viewport_pixel_size,
+                                     float scale_factor) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  scale_factor_ = scale_factor;
+
+  if (viewport_pixel_size_ == viewport_pixel_size)
+    return;
+
+  viewport_pixel_size_ = viewport_pixel_size;
+  contents_.reset(new gfx::Canvas(viewport_pixel_size, 1.0f, true));
+  memset(&bitmap_info_, 0, sizeof(bitmap_info_));
+  gfx::CreateBitmapHeader(viewport_pixel_size_.width(),
+                          viewport_pixel_size_.height(),
+                          &bitmap_info_.bmiHeader);
+}
+
+SkCanvas* SoftwareOutputDeviceWin::BeginPaint(const gfx::Rect& damage_rect) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(contents_);
+
+  damage_rect_ = damage_rect;
+  return contents_ ? contents_->sk_canvas() : NULL;
+}
+
+void SoftwareOutputDeviceWin::EndPaint(cc::SoftwareFrameData* frame_data) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(contents_);
+  DCHECK(frame_data);
+
+  if (!contents_)
+    return;
+
+  SoftwareOutputDevice::EndPaint(frame_data);
+
+  gfx::Rect rect = damage_rect_;
+  rect.Intersect(gfx::Rect(viewport_pixel_size_));
+  if (rect.IsEmpty())
+    return;
+
+  SkCanvas* canvas = contents_->sk_canvas();
+  DCHECK(canvas);
+  if (is_hwnd_composited_) {
+    RECT wr;
+    GetWindowRect(hwnd_, &wr);
+    SIZE size = {wr.right - wr.left, wr.bottom - wr.top};
+    POINT position = {wr.left, wr.top};
+    POINT zero = {0, 0};
+    BLENDFUNCTION blend = {AC_SRC_OVER, 0x00, 0xFF, AC_SRC_ALPHA};
+
+    DWORD style = GetWindowLong(hwnd_, GWL_EXSTYLE);
+    style &= ~WS_EX_COMPOSITED;
+    style |= WS_EX_LAYERED;
+    SetWindowLong(hwnd_, GWL_EXSTYLE, style);
+
+    HDC dib_dc = skia::BeginPlatformPaint(canvas);
+    ::UpdateLayeredWindow(hwnd_, NULL, &position, &size, dib_dc, &zero,
+                          RGB(0xFF, 0xFF, 0xFF), &blend, ULW_ALPHA);
+    skia::EndPlatformPaint(canvas);
+  } else {
+    HDC hdc = ::GetDC(hwnd_);
+    RECT src_rect = rect.ToRECT();
+    skia::DrawToNativeContext(canvas, hdc, rect.x(), rect.y(), &src_rect);
+    ::ReleaseDC(hwnd_, hdc);
+  }
+}
+
+void SoftwareOutputDeviceWin::CopyToPixels(const gfx::Rect& rect,
+                                           void* pixels) {
+  DCHECK(contents_);
+  SkImageInfo info = SkImageInfo::MakeN32Premul(rect.width(), rect.height());
+  contents_->sk_canvas()->readPixels(
+      info, pixels, info.minRowBytes(), rect.x(), rect.y());
+}
+
+}  // namespace content