Initial skeleton of high-contrast mode.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 141 matching lines @@
 // Page dimensions in pixels at 72 DPI.
 constexpr int kA4PortraitPageWidth = 595;
 constexpr int kA4PortraitPageHeight = 842;
 constexpr int kLetterPortraitPageWidth = 612;
 constexpr int kLetterPortraitPageHeight = 792;
 
 }  // namespace
 
 namespace blink {
 
+namespace {
+
+HighContrastSettings InitHighContrastSettingsFromSettings(Settings* settings) {
+  HighContrastSettings result;
+  if (settings) {
+    result.mode = settings->GetHighContrastMode();
+    result.grayscale = settings->GetHighContrastGrayscale();
+    result.contrast = settings->GetHighContrastContrast();
+  } else {
+    result.mode = HighContrastMode::kOff;
+    result.grayscale = false;
+    result.contrast = 0.0;
+  }
+  return result;
+}
+
+}  // namespace
+
 using namespace HTMLNames;
 
 // The maximum number of updatePlugins iterations that should be done before
 // returning.
 static const unsigned kMaxUpdatePluginsIterations = 2;
 static const double kResourcePriorityUpdateDelayAfterScroll = 0.250;
 
 static bool g_initial_track_all_paint_invalidations = false;
 
 FrameView::FrameView(LocalFrame& frame, IntRect frame_rect)
@@ skipping 3087 matching lines @@
 
   LayoutViewItem view = GetLayoutViewItem();
   ASSERT(!view.IsNull());
   ForAllNonThrottledFrameViews([](FrameView& frame_view) {
     frame_view.Lifecycle().AdvanceTo(DocumentLifecycle::kInPaint);
   });
 
   if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
     if (GetLayoutView()->Layer()->NeedsRepaint()) {
       GraphicsContext graphics_context(*paint_controller_);
+      HighContrastSettings high_contrast_settings =
+          InitHighContrastSettingsFromSettings(frame_->GetSettings());
+      graphics_context.SetHighContrast(high_contrast_settings);
       if (RuntimeEnabledFeatures::printBrowserEnabled())
         graphics_context.SetPrinting(true);
       Paint(graphics_context, CullRect(LayoutRect::InfiniteIntRect()));
       paint_controller_->CommitNewDisplayItems(LayoutSize());
       NotifyPaint(*paint_controller_);
     }
   } else {
     // A null graphics layer can occur for painting of SVG images that are not
     // parented into the main frame tree, or when the FrameView is the main
     // frame view of a page overlay. The page overlay is in the layer tree of
@@ skipping 25 matching lines @@
     frame_view.Lifecycle().AdvanceTo(DocumentLifecycle::kPaintClean);
     LayoutViewItem layout_view_item = frame_view.GetLayoutViewItem();
     if (!layout_view_item.IsNull())
       layout_view_item.Layer()->ClearNeedsRepaintRecursively();
   });
 }
 
 void FrameView::PaintGraphicsLayerRecursively(GraphicsLayer* graphics_layer) {
   DCHECK(!RuntimeEnabledFeatures::slimmingPaintV2Enabled());
   if (graphics_layer->DrawsContent()) {
-    graphics_layer->Paint(nullptr);
+    HighContrastSettings high_contrast_settings =
+        InitHighContrastSettingsFromSettings(frame_->GetSettings());
+    graphics_layer->Paint(nullptr, &high_contrast_settings);
     NotifyPaint(graphics_layer->GetPaintController());
   }
 
   if (GraphicsLayer* mask_layer = graphics_layer->MaskLayer())
     PaintGraphicsLayerRecursively(mask_layer);
   if (GraphicsLayer* contents_clipping_mask_layer =
           graphics_layer->ContentsClippingMaskLayer())
     PaintGraphicsLayerRecursively(contents_clipping_mask_layer);
 
   for (auto& child : graphics_layer->Children())
@@ skipping 2058 matching lines @@
 void FrameView::SetAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   animation_host_ = std::move(host);
 }
 
 LayoutUnit FrameView::CaretWidth() const {
   return LayoutUnit(GetChromeClient()->WindowToViewportScalar(1));
 }
 
 }  // namespace blink