Calculate Background Image Geometries using sub-pixel values

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

 // 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 "config.h"
 #include "core/paint/BoxPainter.h"
 
 #include "core/HTMLNames.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ skipping 446 matching lines @@
         }
     }
 
     // no progressive loading of the background image
     if (shouldPaintBackgroundImage) {
         if (!geometry.destRect().isEmpty()) {
             SkXfermode::Mode bgOp = WebCoreCompositeToSkiaComposite(bgLayer.composite(), bgLayer.blendMode());
             // if op != SkXfermode::kSrcOver_Mode, a mask is being painted.
             SkXfermode::Mode compositeOp = op == SkXfermode::kSrcOver_Mode ? bgOp : op;
             const LayoutObject* clientForBackgroundImage = backgroundObject ? backgroundObject : &obj;
-            RefPtr<Image> image = bgImage->image(clientForBackgroundImage, geometry.imageContainerSize(), obj.style()->effectiveZoom());
+            RefPtr<Image> image = bgImage->image(clientForBackgroundImage, flooredIntSize(geometry.imageContainerSize()), obj.style()->effectiveZoom());
             InterpolationQuality interpolationQuality = chooseInterpolationQuality(*clientForBackgroundImage, context, image.get(), &bgLayer, LayoutSize(geometry.tileSize()));
             if (bgLayer.maskSourceType() == MaskLuminance)
                 context->setColorFilter(ColorFilterLuminanceToAlpha);
             InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
             context->setImageInterpolationQuality(interpolationQuality);
             TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(obj, *bgImage));
-            context->drawTiledImage(image.get(), geometry.destRect(), geometry.phase(), geometry.tileSize(),
-                compositeOp, geometry.spaceSize());
+            context->drawTiledImage(image.get(), FloatRect(geometry.destRect()), FloatPoint(geometry.phase()), FloatSize(geometry.tileSize()),
+                compositeOp, FloatSize(geometry.spaceSize()));
             context->setImageInterpolationQuality(previousInterpolationQuality);
         }
     }
 
     if (bgLayer.clip() == TextFillBox) {
         // Create the text mask layer.
         context->beginLayer(1, SkXfermode::kDstIn_Mode);
 
         // Now draw the text into the mask. We do this by painting using a special paint phase that signals to
         // InlineTextBoxes that they should just add their contents to the clip.
@@ skipping 219 matching lines @@
     }
 }
 
 bool BoxPainter::shouldForceWhiteBackgroundForPrintEconomy(const ComputedStyle& style, const Document& document)
 {
     return document.printing() && style.printColorAdjust() == PrintColorAdjustEconomy
         && (!document.settings() || !document.settings()->shouldPrintBackgrounds());
 }
 
 } // namespace blink