1/* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27 28#include "core/platform/graphics/filters/FilterOperation.h" 29 30#include "core/platform/animation/AnimationUtilities.h" 31 32namespace WebCore { 33 34PassRefPtr<FilterOperation> BasicColorMatrixFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) 35{ 36 if (from && !from->isSameType(*this)) 37 return this; 38 39 if (blendToPassthrough) 40 return BasicColorMatrixFilterOperation::create(WebCore::blend(m_amount, passthroughAmount(), progress), m_type); 41 42 const BasicColorMatrixFilterOperation* fromOp = static_cast<const BasicColorMatrixFilterOperation*>(from); 43 double fromAmount = fromOp ? fromOp->amount() : passthroughAmount(); 44 return BasicColorMatrixFilterOperation::create(WebCore::blend(fromAmount, m_amount, progress), m_type); 45} 46 47double BasicColorMatrixFilterOperation::passthroughAmount() const 48{ 49 switch (m_type) { 50 case GRAYSCALE: 51 case SEPIA: 52 case HUE_ROTATE: 53 return 0; 54 case SATURATE: 55 return 1; 56 default: 57 ASSERT_NOT_REACHED(); 58 return 0; 59 } 60} 61 62PassRefPtr<FilterOperation> BasicComponentTransferFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) 63{ 64 if (from && !from->isSameType(*this)) 65 return this; 66 67 if (blendToPassthrough) 68 return BasicComponentTransferFilterOperation::create(WebCore::blend(m_amount, passthroughAmount(), progress), m_type); 69 70 const BasicComponentTransferFilterOperation* fromOp = static_cast<const BasicComponentTransferFilterOperation*>(from); 71 double fromAmount = fromOp ? fromOp->amount() : passthroughAmount(); 72 return BasicComponentTransferFilterOperation::create(WebCore::blend(fromAmount, m_amount, progress), m_type); 73} 74 75double BasicComponentTransferFilterOperation::passthroughAmount() const 76{ 77 switch (m_type) { 78 case OPACITY: 79 return 1; 80 case INVERT: 81 return 0; 82 case CONTRAST: 83 return 1; 84 case BRIGHTNESS: 85 return 1; 86 default: 87 ASSERT_NOT_REACHED(); 88 return 0; 89 } 90} 91 92PassRefPtr<FilterOperation> GammaFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) 93{ 94 if (from && !from->isSameType(*this)) 95 return this; 96 97 if (blendToPassthrough) 98 return GammaFilterOperation::create( 99 WebCore::blend(m_amplitude, 1.0, progress), 100 WebCore::blend(m_exponent, 1.0, progress), 101 WebCore::blend(m_offset, 0.0, progress), m_type); 102 103 const GammaFilterOperation* fromOp = static_cast<const GammaFilterOperation*>(from); 104 double fromAmplitude = fromOp ? fromOp->amplitude() : 1; 105 double fromExponent = fromOp ? fromOp->exponent() : 1; 106 double fromOffset = fromOp ? fromOp->offset() : 0; 107 return GammaFilterOperation::create( 108 WebCore::blend(fromAmplitude, m_amplitude, progress), 109 WebCore::blend(fromExponent, m_exponent, progress), 110 WebCore::blend(fromOffset, m_offset, progress), m_type); 111} 112 113PassRefPtr<FilterOperation> BlurFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) 114{ 115 if (from && !from->isSameType(*this)) 116 return this; 117 118 LengthType lengthType = m_stdDeviation.type(); 119 120 if (blendToPassthrough) 121 return BlurFilterOperation::create(Length(lengthType).blend(m_stdDeviation, progress), m_type); 122 123 const BlurFilterOperation* fromOp = static_cast<const BlurFilterOperation*>(from); 124 Length fromLength = fromOp ? fromOp->m_stdDeviation : Length(lengthType); 125 return BlurFilterOperation::create(m_stdDeviation.blend(fromLength, progress), m_type); 126} 127 128PassRefPtr<FilterOperation> DropShadowFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) 129{ 130 if (from && !from->isSameType(*this)) 131 return this; 132 133 if (blendToPassthrough) 134 return DropShadowFilterOperation::create( 135 WebCore::blend(m_location, IntPoint(), progress), 136 WebCore::blend(m_stdDeviation, 0, progress), 137 WebCore::blend(m_color, Color(Color::transparent), progress), 138 m_type); 139 140 const DropShadowFilterOperation* fromOp = static_cast<const DropShadowFilterOperation*>(from); 141 IntPoint fromLocation = fromOp ? fromOp->location() : IntPoint(); 142 int fromStdDeviation = fromOp ? fromOp->stdDeviation() : 0; 143 Color fromColor = fromOp ? fromOp->color() : Color(Color::transparent); 144 145 return DropShadowFilterOperation::create( 146 WebCore::blend(fromLocation, m_location, progress), 147 WebCore::blend(fromStdDeviation, m_stdDeviation, progress), 148 WebCore::blend(fromColor, m_color, progress), m_type); 149} 150 151} // namespace WebCore 152 153