| /* |
| * Copyright (C) 2011 Apple 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 COMPUTER, 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 COMPUTER, 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 "core/platform/graphics/filters/FilterOperation.h" |
| |
| #include "core/platform/animation/AnimationUtilities.h" |
| |
| namespace WebCore { |
| |
| PassRefPtr<FilterOperation> BasicColorMatrixFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) |
| { |
| if (from && !from->isSameType(*this)) |
| return this; |
| |
| if (blendToPassthrough) |
| return BasicColorMatrixFilterOperation::create(WebCore::blend(m_amount, passthroughAmount(), progress), m_type); |
| |
| const BasicColorMatrixFilterOperation* fromOp = static_cast<const BasicColorMatrixFilterOperation*>(from); |
| double fromAmount = fromOp ? fromOp->amount() : passthroughAmount(); |
| return BasicColorMatrixFilterOperation::create(WebCore::blend(fromAmount, m_amount, progress), m_type); |
| } |
| |
| double BasicColorMatrixFilterOperation::passthroughAmount() const |
| { |
| switch (m_type) { |
| case GRAYSCALE: |
| case SEPIA: |
| case HUE_ROTATE: |
| return 0; |
| case SATURATE: |
| return 1; |
| default: |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| } |
| |
| PassRefPtr<FilterOperation> BasicComponentTransferFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) |
| { |
| if (from && !from->isSameType(*this)) |
| return this; |
| |
| if (blendToPassthrough) |
| return BasicComponentTransferFilterOperation::create(WebCore::blend(m_amount, passthroughAmount(), progress), m_type); |
| |
| const BasicComponentTransferFilterOperation* fromOp = static_cast<const BasicComponentTransferFilterOperation*>(from); |
| double fromAmount = fromOp ? fromOp->amount() : passthroughAmount(); |
| return BasicComponentTransferFilterOperation::create(WebCore::blend(fromAmount, m_amount, progress), m_type); |
| } |
| |
| double BasicComponentTransferFilterOperation::passthroughAmount() const |
| { |
| switch (m_type) { |
| case OPACITY: |
| return 1; |
| case INVERT: |
| return 0; |
| case CONTRAST: |
| return 1; |
| case BRIGHTNESS: |
| return 1; |
| default: |
| ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| } |
| |
| PassRefPtr<FilterOperation> GammaFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) |
| { |
| if (from && !from->isSameType(*this)) |
| return this; |
| |
| if (blendToPassthrough) |
| return GammaFilterOperation::create( |
| WebCore::blend(m_amplitude, 1.0, progress), |
| WebCore::blend(m_exponent, 1.0, progress), |
| WebCore::blend(m_offset, 0.0, progress), m_type); |
| |
| const GammaFilterOperation* fromOp = static_cast<const GammaFilterOperation*>(from); |
| double fromAmplitude = fromOp ? fromOp->amplitude() : 1; |
| double fromExponent = fromOp ? fromOp->exponent() : 1; |
| double fromOffset = fromOp ? fromOp->offset() : 0; |
| return GammaFilterOperation::create( |
| WebCore::blend(fromAmplitude, m_amplitude, progress), |
| WebCore::blend(fromExponent, m_exponent, progress), |
| WebCore::blend(fromOffset, m_offset, progress), m_type); |
| } |
| |
| PassRefPtr<FilterOperation> BlurFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) |
| { |
| if (from && !from->isSameType(*this)) |
| return this; |
| |
| LengthType lengthType = m_stdDeviation.type(); |
| |
| if (blendToPassthrough) |
| return BlurFilterOperation::create(Length(lengthType).blend(m_stdDeviation, progress), m_type); |
| |
| const BlurFilterOperation* fromOp = static_cast<const BlurFilterOperation*>(from); |
| Length fromLength = fromOp ? fromOp->m_stdDeviation : Length(lengthType); |
| return BlurFilterOperation::create(m_stdDeviation.blend(fromLength, progress), m_type); |
| } |
| |
| PassRefPtr<FilterOperation> DropShadowFilterOperation::blend(const FilterOperation* from, double progress, bool blendToPassthrough) |
| { |
| if (from && !from->isSameType(*this)) |
| return this; |
| |
| if (blendToPassthrough) |
| return DropShadowFilterOperation::create( |
| WebCore::blend(m_location, IntPoint(), progress), |
| WebCore::blend(m_stdDeviation, 0, progress), |
| WebCore::blend(m_color, Color(Color::transparent), progress), |
| m_type); |
| |
| const DropShadowFilterOperation* fromOp = static_cast<const DropShadowFilterOperation*>(from); |
| IntPoint fromLocation = fromOp ? fromOp->location() : IntPoint(); |
| int fromStdDeviation = fromOp ? fromOp->stdDeviation() : 0; |
| Color fromColor = fromOp ? fromOp->color() : Color(Color::transparent); |
| |
| return DropShadowFilterOperation::create( |
| WebCore::blend(fromLocation, m_location, progress), |
| WebCore::blend(fromStdDeviation, m_stdDeviation, progress), |
| WebCore::blend(fromColor, m_color, progress), m_type); |
| } |
| |
| } // namespace WebCore |
| |