author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2008 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "CSSGradientValue.h" |
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|
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#include "CSSStyleSelector.h" |
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#include "GeneratedImage.h" |
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#include "Gradient.h" |
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#include "Image.h" |
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#include "IntSize.h" |
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#include "IntSizeHash.h" |
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#include "PlatformString.h" |
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#include "RenderObject.h" |
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using namespace std; |
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|
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namespace WebCore { |
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|
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String CSSGradientValue::cssText() const |
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{ |
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String result = "-webkit-gradient("; |
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if (m_type == CSSLinearGradient) |
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result += "linear, "; |
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else |
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result += "radial, "; |
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result += m_firstX->cssText() + " "; |
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result += m_firstY->cssText() + ", "; |
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if (m_type == CSSRadialGradient) |
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result += m_firstRadius->cssText() + ", "; |
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result += m_secondX->cssText() + " "; |
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result += m_secondY->cssText(); |
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if (m_type == CSSRadialGradient) { |
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result += ", "; |
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result += m_secondRadius->cssText(); |
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} |
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for (unsigned i = 0; i < m_stops.size(); i++) { |
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result += ", "; |
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if (m_stops[i].m_stop == 0) |
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result += "from(" + m_stops[i].m_color->cssText() + ")"; |
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else if (m_stops[i].m_stop == 1) |
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result += "to(" + m_stops[i].m_color->cssText() + ")"; |
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else |
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result += "color-stop(" + String::number(m_stops[i].m_stop) + ", " + m_stops[i].m_color->cssText() + ")"; |
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} |
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result += ")"; |
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return result; |
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} |
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|
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PassRefPtr<Gradient> CSSGradientValue::createGradient(RenderObject* renderer, const IntSize& size) |
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{ |
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ASSERT(!size.isEmpty()); |
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float zoomFactor = renderer->style()->effectiveZoom(); |
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|
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FloatPoint firstPoint = resolvePoint(m_firstX.get(), m_firstY.get(), size, zoomFactor); |
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FloatPoint secondPoint = resolvePoint(m_secondX.get(), m_secondY.get(), size, zoomFactor); |
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|
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RefPtr<Gradient> gradient; |
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if (m_type == CSSLinearGradient) |
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gradient = Gradient::create(firstPoint, secondPoint); |
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else { |
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float firstRadius = resolveRadius(m_firstRadius.get(), zoomFactor); |
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float secondRadius = resolveRadius(m_secondRadius.get(), zoomFactor); |
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gradient = Gradient::create(firstPoint, firstRadius, secondPoint, secondRadius); |
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} |
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|
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// Now add the stops. |
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sortStopsIfNeeded(); |
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|
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// We have to resolve colors. |
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for (unsigned i = 0; i < m_stops.size(); i++) { |
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Color color = renderer->document()->styleSelector()->getColorFromPrimitiveValue(m_stops[i].m_color.get()); |
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gradient->addColorStop(m_stops[i].m_stop, color); |
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} |
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|
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// The back end already sorted the stops. |
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gradient->setStopsSorted(true); |
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return gradient.release(); |
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} |
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Image* CSSGradientValue::image(RenderObject* renderer, const IntSize& size) |
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{ |
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ASSERT(m_clients.contains(renderer)); |
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// Need to look up our size. Create a string of width*height to use as a hash key. |
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Image* result = getImage(renderer, size); |
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if (result) |
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return result; |
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if (size.isEmpty()) |
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return 0; |
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// We need to create an image. |
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RefPtr<Image> newImage = GeneratedImage::create(createGradient(renderer, size), size); |
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result = newImage.get(); |
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putImage(size, newImage.release()); |
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return result; |
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} |
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static inline bool compareStops(const CSSGradientColorStop& a, const CSSGradientColorStop& b) |
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{ |
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return a.m_stop < b.m_stop; |
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} |
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void CSSGradientValue::sortStopsIfNeeded() |
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{ |
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if (!m_stopsSorted) { |
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if (m_stops.size()) |
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std::stable_sort(m_stops.begin(), m_stops.end(), compareStops); |
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m_stopsSorted = true; |
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} |
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} |
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FloatPoint CSSGradientValue::resolvePoint(CSSPrimitiveValue* first, CSSPrimitiveValue* second, const IntSize& size, float zoomFactor) |
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{ |
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FloatPoint result; |
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if (first->primitiveType() == CSSPrimitiveValue::CSS_NUMBER) |
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result.setX(first->getFloatValue() * zoomFactor); |
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else if (first->primitiveType() == CSSPrimitiveValue::CSS_PERCENTAGE) |
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result.setX(first->getFloatValue() / 100.f * size.width()); |
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if (second->primitiveType() == CSSPrimitiveValue::CSS_NUMBER) |
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result.setY(second->getFloatValue() * zoomFactor); |
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else if (second->primitiveType() == CSSPrimitiveValue::CSS_PERCENTAGE) |
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result.setY(second->getFloatValue() / 100.f * size.height()); |
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return result; |
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} |
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float CSSGradientValue::resolveRadius(CSSPrimitiveValue* radius, float zoomFactor) |
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{ |
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float result = 0.f; |
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if (radius->primitiveType() == CSSPrimitiveValue::CSS_NUMBER) |
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result = radius->getFloatValue() * zoomFactor; |
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return result; |
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} |
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} // namespace WebCore |