Source/WebCore/rendering/RenderMediaControlsChromium.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 2009 Apple Inc.
  * Copyright (C) 2009 Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "RenderMediaControlsChromium.h"

 #include "Gradient.h"
 #include "GraphicsContext.h"
 #include "HTMLMediaElement.h"
 #include "HTMLNames.h"
 #include "PaintInfo.h"

 namespace WebCore {

 #if ENABLE(VIDEO)

 typedef WTF::HashMap<const char*, Image*> MediaControlImageMap;
 static MediaControlImageMap* gMediaControlImageMap = 0;

 static Image* platformResource(const char* name)
 {
     if (!gMediaControlImageMap)
         gMediaControlImageMap = new MediaControlImageMap();
     if (Image* image = gMediaControlImageMap->get(name))
         return image;
     if (Image* image = Image::loadPlatformResource(name).releaseRef()) {
         gMediaControlImageMap->set(name, image);
         return image;
     }
     ASSERT_NOT_REACHED();
     return 0;
 }

 static bool hasSource(const HTMLMediaElement* mediaElement)
 {
     return mediaElement->networkState() != HTMLMediaElement::NETWORK_EMPTY
         && mediaElement->networkState() != HTMLMediaElement::NETWORK_NO_SOURCE;
 }

 static bool paintMediaButton(GraphicsContext* context, const IntRect& rect, Image* image)
 {
     IntRect imageRect = image->rect();
     context->drawImage(image, ColorSpaceDeviceRGB, rect);
     return true;
 }

 static bool paintMediaMuteButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(object);
     if (!mediaElement)
       return false;

     static Image* soundFull = platformResource("mediaSoundFull");
     static Image* soundNone = platformResource("mediaSoundNone");
     static Image* soundDisabled = platformResource("mediaSoundDisabled");

     if (!hasSource(mediaElement) || !mediaElement->hasAudio())
         return paintMediaButton(paintInfo.context, rect, soundDisabled);

     return paintMediaButton(paintInfo.context, rect, mediaElement->muted() ? soundNone: soundFull);
 }

 static bool paintMediaPlayButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(object);
     if (!mediaElement)
         return false;

     static Image* mediaPlay = platformResource("mediaPlay");
     static Image* mediaPause = platformResource("mediaPause");
     static Image* mediaPlayDisabled = platformResource("mediaPlayDisabled");

     if (!hasSource(mediaElement))
         return paintMediaButton(paintInfo.context, rect, mediaPlayDisabled);

     return paintMediaButton(paintInfo.context, rect, mediaElement->canPlay() ? mediaPlay : mediaPause);
 }

 static Image* getMediaSliderThumb()
 {
     static Image* mediaSliderThumb = platformResource("mediaSliderThumb");
     return mediaSliderThumb;
 }

 static bool paintMediaSlider(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(object);
     if (!mediaElement)
         return false;

     RenderStyle* style = object->style();
     GraphicsContext* context = paintInfo.context;

     // Draw the border of the time bar.
     // FIXME: this should be a rounded rect but need to fix GraphicsContextSkia first.
     // https://bugs.webkit.org/show_bug.cgi?id=30143
     context->save();
     context->setShouldAntialias(true);
     context->setStrokeStyle(SolidStroke);
     context->setStrokeColor(style->visitedDependentColor(CSSPropertyBorderLeftColor), ColorSpaceDeviceRGB);
     context->setStrokeThickness(style->borderLeftWidth());
     context->setFillColor(style->visitedDependentColor(CSSPropertyBackgroundColor), ColorSpaceDeviceRGB);
     context->drawRect(rect);
     context->restore();

     // Draw the buffered ranges.
     // FIXME: Draw multiple ranges if there are multiple buffered ranges.
     IntRect bufferedRect = rect;
     bufferedRect.inflate(-style->borderLeftWidth());

     double bufferedWidth = 0.0;
     if (mediaElement->percentLoaded() > 0.0) {
         // Account for the width of the slider thumb.
         Image* mediaSliderThumb = getMediaSliderThumb();
         double thumbWidth = mediaSliderThumb->width() / 2.0 + 1.0;
         double rectWidth = bufferedRect.width() - thumbWidth;
         if (rectWidth < 0.0)
             rectWidth = 0.0;
         bufferedWidth = rectWidth * mediaElement->percentLoaded() + thumbWidth;
     }
     bufferedRect.setWidth(bufferedWidth);

     // Don't bother drawing an empty area.
     if (!bufferedRect.isEmpty()) {
         IntPoint sliderTopLeft = bufferedRect.location();
         IntPoint sliderTopRight = sliderTopLeft;
         sliderTopRight.move(0, bufferedRect.height());

         RefPtr<Gradient> gradient = Gradient::create(sliderTopLeft, sliderTopRight);
         Color startColor = object->style()->visitedDependentColor(CSSPropertyColor);
         gradient->addColorStop(0.0, startColor);
         gradient->addColorStop(1.0, Color(startColor.red() / 2, startColor.green() / 2, startColor.blue() / 2, startColor.alpha()));

         context->save();
         context->setStrokeStyle(NoStroke);
         context->setFillGradient(gradient);
         context->fillRect(bufferedRect);
         context->restore();
     }

     return true;
 }

 static bool paintMediaSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     if (!object->parent()->isSlider())
         return false;

     HTMLMediaElement* mediaElement = toParentMediaElement(object->parent());
     if (!mediaElement)
         return false;

     if (!hasSource(mediaElement))
         return true;

     Image* mediaSliderThumb = getMediaSliderThumb();
     return paintMediaButton(paintInfo.context, rect, mediaSliderThumb);
 }

 static bool paintMediaVolumeSlider(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(object);
     if (!mediaElement)
         return false;

     GraphicsContext* context = paintInfo.context;
     Color originalColor = context->strokeColor();
     if (originalColor != Color::white)
         context->setStrokeColor(Color::white, ColorSpaceDeviceRGB);

     int x = rect.x() + rect.width() / 2;
     context->drawLine(IntPoint(x, rect.y()),  IntPoint(x, rect.y() + rect.height()));

     if (originalColor != Color::white)
         context->setStrokeColor(originalColor, ColorSpaceDeviceRGB);
     return true;
 }

 static bool paintMediaVolumeSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     if (!object->parent()->isSlider())
         return false;

     static Image* mediaVolumeSliderThumb = platformResource("mediaVolumeSliderThumb");
     return paintMediaButton(paintInfo.context, rect, mediaVolumeSliderThumb);
 }

 static bool paintMediaTimelineContainer(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(object);
     if (!mediaElement)
         return false;

     if (!rect.isEmpty()) {
         GraphicsContext* context = paintInfo.context;
         Color originalColor = context->strokeColor();
         float originalThickness = context->strokeThickness();
         StrokeStyle originalStyle = context->strokeStyle();

         context->setStrokeStyle(SolidStroke);

         // Draw the left border using CSS defined width and color.
         context->setStrokeThickness(object->style()->borderLeftWidth());
         context->setStrokeColor(object->style()->visitedDependentColor(CSSPropertyBorderLeftColor).rgb(), ColorSpaceDeviceRGB);
         context->drawLine(IntPoint(rect.x() + 1, rect.y()),
                           IntPoint(rect.x() + 1, rect.y() + rect.height()));

         // Draw the right border using CSS defined width and color.
         context->setStrokeThickness(object->style()->borderRightWidth());
         context->setStrokeColor(object->style()->visitedDependentColor(CSSPropertyBorderRightColor).rgb(), ColorSpaceDeviceRGB);
         context->drawLine(IntPoint(rect.x() + rect.width() - 1, rect.y()),
                           IntPoint(rect.x() + rect.width() - 1, rect.y() + rect.height()));

         context->setStrokeColor(originalColor, ColorSpaceDeviceRGB);
         context->setStrokeThickness(originalThickness);
         context->setStrokeStyle(originalStyle);
     }
     return true;
 }

 bool RenderMediaControlsChromium::paintMediaControlsPart(MediaControlElementType part, RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
 {
     switch (part) {
     case MediaMuteButton:
     case MediaUnMuteButton:
         return paintMediaMuteButton(object, paintInfo, rect);
     case MediaPauseButton:
     case MediaPlayButton:
         return paintMediaPlayButton(object, paintInfo, rect);
     case MediaSlider:
         return paintMediaSlider(object, paintInfo, rect);
     case MediaSliderThumb:
         return paintMediaSliderThumb(object, paintInfo, rect);
     case MediaVolumeSlider:
         return paintMediaVolumeSlider(object, paintInfo, rect);
     case MediaVolumeSliderThumb:
         return paintMediaVolumeSliderThumb(object, paintInfo, rect);
     case MediaTimelineContainer:
         return paintMediaTimelineContainer(object, paintInfo, rect);
     case MediaVolumeSliderMuteButton:
     case MediaFullscreenButton:
     case MediaSeekBackButton:
     case MediaSeekForwardButton:
     case MediaVolumeSliderContainer:
     case MediaCurrentTimeDisplay:
     case MediaTimeRemainingDisplay:
     case MediaControlsPanel:
     case MediaRewindButton:
     case MediaReturnToRealtimeButton:
     case MediaStatusDisplay:
     case MediaShowClosedCaptionsButton:
     case MediaHideClosedCaptionsButton:
         ASSERT_NOT_REACHED();
         break;
     }
     return false;
 }

 void RenderMediaControlsChromium::adjustMediaSliderThumbSize(RenderObject* object)
 {
     static Image* mediaSliderThumb = platformResource("mediaSliderThumb");
     static Image* mediaVolumeSliderThumb = platformResource("mediaVolumeSliderThumb");

     Image* thumbImage = 0;
     if (object->style()->appearance() == MediaSliderThumbPart)
         thumbImage = mediaSliderThumb;
     else if (object->style()->appearance() == MediaVolumeSliderThumbPart)
         thumbImage = mediaVolumeSliderThumb;

     float zoomLevel = object->style()->effectiveZoom();
     if (thumbImage) {
         object->style()->setWidth(Length(static_cast<int>(thumbImage->width() * zoomLevel), Fixed));
         object->style()->setHeight(Length(static_cast<int>(thumbImage->height() * zoomLevel), Fixed));
     }
 }

 #endif  // #if ENABLE(VIDEO)

 } // namespace WebCore
	/*
	* Copyright (C) 2009 Apple Inc.
	* Copyright (C) 2009 Google Inc.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "RenderMediaControlsChromium.h"

	#include "Gradient.h"
	#include "GraphicsContext.h"
	#include "HTMLMediaElement.h"
	#include "HTMLNames.h"
	#include "PaintInfo.h"

	namespace WebCore {

	#if ENABLE(VIDEO)

	typedef WTF::HashMap<const char, Image> MediaControlImageMap;
	static MediaControlImageMap* gMediaControlImageMap = 0;

	static Image* platformResource(const char* name)
	{
	if (!gMediaControlImageMap)
	gMediaControlImageMap = new MediaControlImageMap();
	if (Image* image = gMediaControlImageMap->get(name))
	return image;
	if (Image* image = Image::loadPlatformResource(name).releaseRef()) {
	gMediaControlImageMap->set(name, image);
	return image;
	}
	ASSERT_NOT_REACHED();
	return 0;
	}

	static bool hasSource(const HTMLMediaElement* mediaElement)
	{
	return mediaElement->networkState() != HTMLMediaElement::NETWORK_EMPTY
	&& mediaElement->networkState() != HTMLMediaElement::NETWORK_NO_SOURCE;
	}

	static bool paintMediaButton(GraphicsContext* context, const IntRect& rect, Image* image)
	{
	IntRect imageRect = image->rect();
	context->drawImage(image, ColorSpaceDeviceRGB, rect);
	return true;
	}

	static bool paintMediaMuteButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	HTMLMediaElement* mediaElement = toParentMediaElement(object);
	if (!mediaElement)
	return false;

	static Image* soundFull = platformResource("mediaSoundFull");
	static Image* soundNone = platformResource("mediaSoundNone");
	static Image* soundDisabled = platformResource("mediaSoundDisabled");

	if (!hasSource(mediaElement) \|\| !mediaElement->hasAudio())
	return paintMediaButton(paintInfo.context, rect, soundDisabled);

	return paintMediaButton(paintInfo.context, rect, mediaElement->muted() ? soundNone: soundFull);
	}

	static bool paintMediaPlayButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	HTMLMediaElement* mediaElement = toParentMediaElement(object);
	if (!mediaElement)
	return false;

	static Image* mediaPlay = platformResource("mediaPlay");
	static Image* mediaPause = platformResource("mediaPause");
	static Image* mediaPlayDisabled = platformResource("mediaPlayDisabled");

	if (!hasSource(mediaElement))
	return paintMediaButton(paintInfo.context, rect, mediaPlayDisabled);

	return paintMediaButton(paintInfo.context, rect, mediaElement->canPlay() ? mediaPlay : mediaPause);
	}

	static Image* getMediaSliderThumb()
	{
	static Image* mediaSliderThumb = platformResource("mediaSliderThumb");
	return mediaSliderThumb;
	}

	static bool paintMediaSlider(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	HTMLMediaElement* mediaElement = toParentMediaElement(object);
	if (!mediaElement)
	return false;

	RenderStyle* style = object->style();
	GraphicsContext* context = paintInfo.context;

	// Draw the border of the time bar.
	// FIXME: this should be a rounded rect but need to fix GraphicsContextSkia first.
	// https://bugs.webkit.org/show_bug.cgi?id=30143
	context->save();
	context->setShouldAntialias(true);
	context->setStrokeStyle(SolidStroke);
	context->setStrokeColor(style->visitedDependentColor(CSSPropertyBorderLeftColor), ColorSpaceDeviceRGB);
	context->setStrokeThickness(style->borderLeftWidth());
	context->setFillColor(style->visitedDependentColor(CSSPropertyBackgroundColor), ColorSpaceDeviceRGB);
	context->drawRect(rect);
	context->restore();

	// Draw the buffered ranges.
	// FIXME: Draw multiple ranges if there are multiple buffered ranges.
	IntRect bufferedRect = rect;
	bufferedRect.inflate(-style->borderLeftWidth());

	double bufferedWidth = 0.0;
	if (mediaElement->percentLoaded() > 0.0) {
	// Account for the width of the slider thumb.
	Image* mediaSliderThumb = getMediaSliderThumb();
	double thumbWidth = mediaSliderThumb->width() / 2.0 + 1.0;
	double rectWidth = bufferedRect.width() - thumbWidth;
	if (rectWidth < 0.0)
	rectWidth = 0.0;
	bufferedWidth = rectWidth * mediaElement->percentLoaded() + thumbWidth;
	}
	bufferedRect.setWidth(bufferedWidth);

	// Don't bother drawing an empty area.
	if (!bufferedRect.isEmpty()) {
	IntPoint sliderTopLeft = bufferedRect.location();
	IntPoint sliderTopRight = sliderTopLeft;
	sliderTopRight.move(0, bufferedRect.height());

	RefPtr<Gradient> gradient = Gradient::create(sliderTopLeft, sliderTopRight);
	Color startColor = object->style()->visitedDependentColor(CSSPropertyColor);
	gradient->addColorStop(0.0, startColor);
	gradient->addColorStop(1.0, Color(startColor.red() / 2, startColor.green() / 2, startColor.blue() / 2, startColor.alpha()));

	context->save();
	context->setStrokeStyle(NoStroke);
	context->setFillGradient(gradient);
	context->fillRect(bufferedRect);
	context->restore();
	}

	return true;
	}

	static bool paintMediaSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	if (!object->parent()->isSlider())
	return false;

	HTMLMediaElement* mediaElement = toParentMediaElement(object->parent());
	if (!mediaElement)
	return false;

	if (!hasSource(mediaElement))
	return true;

	Image* mediaSliderThumb = getMediaSliderThumb();
	return paintMediaButton(paintInfo.context, rect, mediaSliderThumb);
	}

	static bool paintMediaVolumeSlider(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	HTMLMediaElement* mediaElement = toParentMediaElement(object);
	if (!mediaElement)
	return false;

	GraphicsContext* context = paintInfo.context;
	Color originalColor = context->strokeColor();
	if (originalColor != Color::white)
	context->setStrokeColor(Color::white, ColorSpaceDeviceRGB);

	int x = rect.x() + rect.width() / 2;
	context->drawLine(IntPoint(x, rect.y()), IntPoint(x, rect.y() + rect.height()));

	if (originalColor != Color::white)
	context->setStrokeColor(originalColor, ColorSpaceDeviceRGB);
	return true;
	}

	static bool paintMediaVolumeSliderThumb(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	if (!object->parent()->isSlider())
	return false;

	static Image* mediaVolumeSliderThumb = platformResource("mediaVolumeSliderThumb");
	return paintMediaButton(paintInfo.context, rect, mediaVolumeSliderThumb);
	}

	static bool paintMediaTimelineContainer(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	HTMLMediaElement* mediaElement = toParentMediaElement(object);
	if (!mediaElement)
	return false;

	if (!rect.isEmpty()) {
	GraphicsContext* context = paintInfo.context;
	Color originalColor = context->strokeColor();
	float originalThickness = context->strokeThickness();
	StrokeStyle originalStyle = context->strokeStyle();

	context->setStrokeStyle(SolidStroke);

	// Draw the left border using CSS defined width and color.
	context->setStrokeThickness(object->style()->borderLeftWidth());
	context->setStrokeColor(object->style()->visitedDependentColor(CSSPropertyBorderLeftColor).rgb(), ColorSpaceDeviceRGB);
	context->drawLine(IntPoint(rect.x() + 1, rect.y()),
	IntPoint(rect.x() + 1, rect.y() + rect.height()));

	// Draw the right border using CSS defined width and color.
	context->setStrokeThickness(object->style()->borderRightWidth());
	context->setStrokeColor(object->style()->visitedDependentColor(CSSPropertyBorderRightColor).rgb(), ColorSpaceDeviceRGB);
	context->drawLine(IntPoint(rect.x() + rect.width() - 1, rect.y()),
	IntPoint(rect.x() + rect.width() - 1, rect.y() + rect.height()));

	context->setStrokeColor(originalColor, ColorSpaceDeviceRGB);
	context->setStrokeThickness(originalThickness);
	context->setStrokeStyle(originalStyle);
	}
	return true;
	}

	bool RenderMediaControlsChromium::paintMediaControlsPart(MediaControlElementType part, RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
	{
	switch (part) {
	case MediaMuteButton:
	case MediaUnMuteButton:
	return paintMediaMuteButton(object, paintInfo, rect);
	case MediaPauseButton:
	case MediaPlayButton:
	return paintMediaPlayButton(object, paintInfo, rect);
	case MediaSlider:
	return paintMediaSlider(object, paintInfo, rect);
	case MediaSliderThumb:
	return paintMediaSliderThumb(object, paintInfo, rect);
	case MediaVolumeSlider:
	return paintMediaVolumeSlider(object, paintInfo, rect);
	case MediaVolumeSliderThumb:
	return paintMediaVolumeSliderThumb(object, paintInfo, rect);
	case MediaTimelineContainer:
	return paintMediaTimelineContainer(object, paintInfo, rect);
	case MediaVolumeSliderMuteButton:
	case MediaFullscreenButton:
	case MediaSeekBackButton:
	case MediaSeekForwardButton:
	case MediaVolumeSliderContainer:
	case MediaCurrentTimeDisplay:
	case MediaTimeRemainingDisplay:
	case MediaControlsPanel:
	case MediaRewindButton:
	case MediaReturnToRealtimeButton:
	case MediaStatusDisplay:
	case MediaShowClosedCaptionsButton:
	case MediaHideClosedCaptionsButton:
	ASSERT_NOT_REACHED();
	break;
	}
	return false;
	}

	void RenderMediaControlsChromium::adjustMediaSliderThumbSize(RenderObject* object)
	{
	static Image* mediaSliderThumb = platformResource("mediaSliderThumb");
	static Image* mediaVolumeSliderThumb = platformResource("mediaVolumeSliderThumb");

	Image* thumbImage = 0;
	if (object->style()->appearance() == MediaSliderThumbPart)
	thumbImage = mediaSliderThumb;
	else if (object->style()->appearance() == MediaVolumeSliderThumbPart)
	thumbImage = mediaVolumeSliderThumb;

	float zoomLevel = object->style()->effectiveZoom();
	if (thumbImage) {
	object->style()->setWidth(Length(static_cast<int>(thumbImage->width() * zoomLevel), Fixed));
	object->style()->setHeight(Length(static_cast<int>(thumbImage->height() * zoomLevel), Fixed));
	}
	}

	#endif // #if ENABLE(VIDEO)

	} // namespace WebCore