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 "platform/graphics/filters/FilterOperation.h" 29 30#include "platform/animation/AnimationUtilities.h" 31 32namespace blink { 33 34PassRefPtr<FilterOperation> FilterOperation::blend(const FilterOperation* from, const FilterOperation* to, double progress) 35{ 36 ASSERT(from || to); 37 if (to) 38 return to->blend(from, progress); 39 return from->blend(0, 1 - progress); 40} 41 42PassRefPtr<FilterOperation> BasicColorMatrixFilterOperation::blend(const FilterOperation* from, double progress) const 43{ 44 double fromAmount; 45 if (from) { 46 ASSERT_WITH_SECURITY_IMPLICATION(from->isSameType(*this)); 47 fromAmount = toBasicColorMatrixFilterOperation(from)->amount(); 48 } else { 49 switch (m_type) { 50 case GRAYSCALE: 51 case SEPIA: 52 case HUE_ROTATE: 53 fromAmount = 0; 54 break; 55 case SATURATE: 56 fromAmount = 1; 57 break; 58 default: 59 fromAmount = 0; 60 ASSERT_NOT_REACHED(); 61 } 62 } 63 64 double result = blink::blend(fromAmount, m_amount, progress); 65 switch (m_type) { 66 case HUE_ROTATE: 67 break; 68 case GRAYSCALE: 69 case SEPIA: 70 result = clampTo<double>(result, 0, 1); 71 break; 72 case SATURATE: 73 result = clampTo<double>(result, 0); 74 break; 75 default: 76 ASSERT_NOT_REACHED(); 77 } 78 return BasicColorMatrixFilterOperation::create(result, m_type); 79} 80 81PassRefPtr<FilterOperation> BasicComponentTransferFilterOperation::blend(const FilterOperation* from, double progress) const 82{ 83 double fromAmount; 84 if (from) { 85 ASSERT_WITH_SECURITY_IMPLICATION(from->isSameType(*this)); 86 fromAmount = toBasicComponentTransferFilterOperation(from)->amount(); 87 } else { 88 switch (m_type) { 89 case OPACITY: 90 case CONTRAST: 91 case BRIGHTNESS: 92 fromAmount = 1; 93 break; 94 case INVERT: 95 fromAmount = 0; 96 break; 97 default: 98 fromAmount = 0; 99 ASSERT_NOT_REACHED(); 100 } 101 } 102 103 double result = blink::blend(fromAmount, m_amount, progress); 104 switch (m_type) { 105 case BRIGHTNESS: 106 case CONTRAST: 107 result = clampTo<double>(result, 0); 108 break; 109 case INVERT: 110 case OPACITY: 111 result = clampTo<double>(result, 0, 1); 112 break; 113 default: 114 ASSERT_NOT_REACHED(); 115 } 116 return BasicComponentTransferFilterOperation::create(result, m_type); 117} 118 119PassRefPtr<FilterOperation> BlurFilterOperation::blend(const FilterOperation* from, double progress) const 120{ 121 LengthType lengthType = m_stdDeviation.type(); 122 if (!from) 123 return BlurFilterOperation::create(m_stdDeviation.blend(Length(lengthType), progress, ValueRangeNonNegative)); 124 125 const BlurFilterOperation* fromOp = toBlurFilterOperation(from); 126 return BlurFilterOperation::create(m_stdDeviation.blend(fromOp->m_stdDeviation, progress, ValueRangeNonNegative)); 127} 128 129PassRefPtr<FilterOperation> DropShadowFilterOperation::blend(const FilterOperation* from, double progress) const 130{ 131 if (!from) { 132 return DropShadowFilterOperation::create( 133 blink::blend(IntPoint(), m_location, progress), 134 blink::blend(0, m_stdDeviation, progress), 135 blink::blend(Color(Color::transparent), m_color, progress)); 136 } 137 138 const DropShadowFilterOperation* fromOp = toDropShadowFilterOperation(from); 139 return DropShadowFilterOperation::create( 140 blink::blend(fromOp->location(), m_location, progress), 141 blink::blend(fromOp->stdDeviation(), m_stdDeviation, progress), 142 blink::blend(fromOp->color(), m_color, progress)); 143} 144 145} // namespace blink 146 147