Use refs for GraphicsContext

third_party/WebKit/Source/core/paint/ThemePainter.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 58 matching lines @@
         return paintUsingFallbackTheme(o, paintInfo, r);
 
 #if USE(NEW_THEME)
     switch (part) {
     case CheckboxPart:
     case RadioPart:
     case PushButtonPart:
     case SquareButtonPart:
     case ButtonPart:
     case InnerSpinButtonPart:
-        platformTheme()->paint(part, LayoutTheme::controlStatesForLayoutObject(o), const_cast<GraphicsContext*>(paintInfo.context), r, o.styleRef().effectiveZoom(), o.view()->frameView());
+        platformTheme()->paint(part, LayoutTheme::controlStatesForLayoutObject(o), const_cast<GraphicsContext&>(paintInfo.context), r, o.styleRef().effectiveZoom(), o.view()->frameView());
         return false;
     default:
         break;
     }
 #endif
 
     // Call the appropriate paint method based off the appearance value.
     switch (part) {
 #if !USE(NEW_THEME)
     case CheckboxPart:
@@ skipping 217 matching lines @@
         if (!input->isValidValue(value))
             continue;
         double parsedValue = parseToDoubleForNumberType(input->sanitizeValue(value));
         double tickFraction = (parsedValue - min) / (max - min);
         double tickRatio = isHorizontal && o.styleRef().isLeftToRightDirection() ? tickFraction : 1.0 - tickFraction;
         double tickPosition = round(tickRegionSideMargin + tickRegionWidth * tickRatio);
         if (isHorizontal)
             tickRect.setX(tickPosition);
         else
             tickRect.setY(tickPosition);
-        paintInfo.context->fillRect(tickRect, o.resolveColor(CSSPropertyColor));
+        paintInfo.context.fillRect(tickRect, o.resolveColor(CSSPropertyColor));
     }
 }
 
 bool ThemePainter::paintUsingFallbackTheme(const LayoutObject& o, const PaintInfo& i, const IntRect&r)
 {
     ControlPart part = o.styleRef().appearance();
     switch (part) {
     case CheckboxPart:
         return paintCheckboxUsingFallbackTheme(o, i, r);
     case RadioPart:
         return paintRadioUsingFallbackTheme(o, i, r);
     default:
         break;
     }
     return true;
 }
 
 bool ThemePainter::paintCheckboxUsingFallbackTheme(const LayoutObject& o, const PaintInfo& i, const IntRect&r)
 {
     WebFallbackThemeEngine::ExtraParams extraParams;
-    WebCanvas* canvas = i.context->canvas();
+    WebCanvas* canvas = i.context.canvas();
     extraParams.button.checked = LayoutTheme::isChecked(o);
     extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
 
     float zoomLevel = o.styleRef().effectiveZoom();
-    GraphicsContextStateSaver stateSaver(*i.context);
+    GraphicsContextStateSaver stateSaver(i.context);
     IntRect unzoomedRect = r;
     if (zoomLevel != 1) {
         unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
         unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
-        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
-        i.context->scale(zoomLevel, zoomLevel);
-        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+        i.context.translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context.scale(zoomLevel, zoomLevel);
+        i.context.translate(-unzoomedRect.x(), -unzoomedRect.y());
     }
 
     Platform::current()->fallbackThemeEngine()->paint(canvas, WebFallbackThemeEngine::PartCheckbox, getWebFallbackThemeState(o), WebRect(unzoomedRect), &extraParams);
     return false;
 }
 
 bool ThemePainter::paintRadioUsingFallbackTheme(const LayoutObject& o, const PaintInfo& i, const IntRect&r)
 {
     WebFallbackThemeEngine::ExtraParams extraParams;
-    WebCanvas* canvas = i.context->canvas();
+    WebCanvas* canvas = i.context.canvas();
     extraParams.button.checked = LayoutTheme::isChecked(o);
     extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
 
     float zoomLevel = o.styleRef().effectiveZoom();
-    GraphicsContextStateSaver stateSaver(*i.context);
+    GraphicsContextStateSaver stateSaver(i.context);
     IntRect unzoomedRect = r;
     if (zoomLevel != 1) {
         unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
         unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
-        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
-        i.context->scale(zoomLevel, zoomLevel);
-        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+        i.context.translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context.scale(zoomLevel, zoomLevel);
+        i.context.translate(-unzoomedRect.x(), -unzoomedRect.y());
     }
 
     Platform::current()->fallbackThemeEngine()->paint(canvas, WebFallbackThemeEngine::PartRadio, getWebFallbackThemeState(o), WebRect(unzoomedRect), &extraParams);
     return false;
 }
 
 } // namespace blink