| /* |
| * 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 "sky/engine/platform/graphics/filters/FilterOperation.h" |
| |
| #include "sky/engine/platform/animation/AnimationUtilities.h" |
| |
| namespace blink { |
| |
| PassRefPtr<FilterOperation> FilterOperation::blend(const FilterOperation* from, const FilterOperation* to, double progress) |
| { |
| ASSERT(from || to); |
| if (to) |
| return to->blend(from, progress); |
| return from->blend(0, 1 - progress); |
| } |
| |
| PassRefPtr<FilterOperation> BasicColorMatrixFilterOperation::blend(const FilterOperation* from, double progress) const |
| { |
| double fromAmount; |
| if (from) { |
| ASSERT_WITH_SECURITY_IMPLICATION(from->isSameType(*this)); |
| fromAmount = toBasicColorMatrixFilterOperation(from)->amount(); |
| } else { |
| switch (m_type) { |
| case GRAYSCALE: |
| case SEPIA: |
| case HUE_ROTATE: |
| fromAmount = 0; |
| break; |
| case SATURATE: |
| fromAmount = 1; |
| break; |
| default: |
| fromAmount = 0; |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| double result = blink::blend(fromAmount, m_amount, progress); |
| switch (m_type) { |
| case HUE_ROTATE: |
| break; |
| case GRAYSCALE: |
| case SEPIA: |
| result = clampTo<double>(result, 0, 1); |
| break; |
| case SATURATE: |
| result = clampTo<double>(result, 0); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| return BasicColorMatrixFilterOperation::create(result, m_type); |
| } |
| |
| PassRefPtr<FilterOperation> BasicComponentTransferFilterOperation::blend(const FilterOperation* from, double progress) const |
| { |
| double fromAmount; |
| if (from) { |
| ASSERT_WITH_SECURITY_IMPLICATION(from->isSameType(*this)); |
| fromAmount = toBasicComponentTransferFilterOperation(from)->amount(); |
| } else { |
| switch (m_type) { |
| case OPACITY: |
| case CONTRAST: |
| case BRIGHTNESS: |
| fromAmount = 1; |
| break; |
| case INVERT: |
| fromAmount = 0; |
| break; |
| default: |
| fromAmount = 0; |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| double result = blink::blend(fromAmount, m_amount, progress); |
| switch (m_type) { |
| case BRIGHTNESS: |
| case CONTRAST: |
| result = clampTo<double>(result, 0); |
| break; |
| case INVERT: |
| case OPACITY: |
| result = clampTo<double>(result, 0, 1); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| return BasicComponentTransferFilterOperation::create(result, m_type); |
| } |
| |
| PassRefPtr<FilterOperation> BlurFilterOperation::blend(const FilterOperation* from, double progress) const |
| { |
| LengthType lengthType = m_stdDeviation.type(); |
| if (!from) |
| return BlurFilterOperation::create(m_stdDeviation.blend(Length(lengthType), progress, ValueRangeNonNegative)); |
| |
| const BlurFilterOperation* fromOp = toBlurFilterOperation(from); |
| return BlurFilterOperation::create(m_stdDeviation.blend(fromOp->m_stdDeviation, progress, ValueRangeNonNegative)); |
| } |
| |
| PassRefPtr<FilterOperation> DropShadowFilterOperation::blend(const FilterOperation* from, double progress) const |
| { |
| if (!from) { |
| return DropShadowFilterOperation::create( |
| blink::blend(IntPoint(), m_location, progress), |
| blink::blend(0, m_stdDeviation, progress), |
| blink::blend(Color(Color::transparent), m_color, progress)); |
| } |
| |
| const DropShadowFilterOperation* fromOp = toDropShadowFilterOperation(from); |
| return DropShadowFilterOperation::create( |
| blink::blend(fromOp->location(), m_location, progress), |
| blink::blend(fromOp->stdDeviation(), m_stdDeviation, progress), |
| blink::blend(fromOp->color(), m_color, progress)); |
| } |
| |
| } // namespace blink |
| |