Move FilterOperation*.{cpp,h} to core/style/

third_party/WebKit/Source/platform/graphics/filters/FilterOperation.cpp

-/*
- * 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 "platform/graphics/filters/FilterOperation.h"
-
-#include "platform/LengthFunctions.h"
-#include "platform/animation/AnimationUtilities.h"
-#include "platform/graphics/filters/FEGaussianBlur.h"
-#include "platform/graphics/filters/FilterEffect.h"
-#include "platform/graphics/filters/SkiaImageFilterBuilder.h"
-
-namespace blink {
-
-static inline FloatSize outsetSizeForBlur(float stdDeviation)
-{
-    IntSize kernelSize = FEGaussianBlur::calculateUnscaledKernelSize(FloatPoint(stdDeviation, stdDeviation));
-    FloatSize outset;
-    // We take the half kernel size and multiply it with three, because we run box blur three times.
-    outset.setWidth(3.0f * kernelSize.width() * 0.5f);
-    outset.setHeight(3.0f * kernelSize.height() * 0.5f);
-    return outset;
-}
-
-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);
-}
-
-DEFINE_TRACE(ReferenceFilterOperation)
-{
-    visitor->trace(m_filter);
-    FilterOperation::trace(visitor);
-}
-
-FloatRect ReferenceFilterOperation::mapRect(const FloatRect& rect) const
-{
-    const auto* lastEffect = m_filter ? m_filter->lastEffect() : nullptr;
-    if (!lastEffect)
-        return rect;
-    return lastEffect->mapRect(rect);
-}
-
-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);
-}
-
-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);
-}
-
-FloatRect BlurFilterOperation::mapRect(const FloatRect& rect) const
-{
-    // Matches FEGaussianBlur::mapRect.
-    float stdDeviation = floatValueForLength(m_stdDeviation, 0);
-    FloatSize outsetSize = outsetSizeForBlur(stdDeviation);
-    FloatRect mappedRect = rect;
-    mappedRect.inflateX(outsetSize.width());
-    mappedRect.inflateY(outsetSize.height());
-    return mappedRect;
-}
-
-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));
-}
-
-FloatRect DropShadowFilterOperation::mapRect(const FloatRect& rect) const
-{
-    FloatSize outsetSize = outsetSizeForBlur(m_stdDeviation);
-    FloatRect mappedRect = rect;
-    mappedRect.inflateX(outsetSize.width());
-    mappedRect.inflateY(outsetSize.height());
-    mappedRect.moveBy(m_location);
-    mappedRect.unite(rect);
-    return mappedRect;
-}
-
-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->getColor(), m_color, progress));
-}
-
-FloatRect BoxReflectFilterOperation::mapRect(const FloatRect& rect) const
-{
-    return m_reflection.mapRect(rect);
-}
-
-FilterOperation* BoxReflectFilterOperation::blend(const FilterOperation* from, double progress) const
-{
-    ASSERT_NOT_REACHED();
-    return nullptr;
-}
-
-bool BoxReflectFilterOperation::operator==(const FilterOperation& o) const
-{
-    if (!isSameType(o))
-        return false;
-    const auto& other = static_cast<const BoxReflectFilterOperation&>(o);
-    return m_reflection == other.m_reflection;
-}
-
-} // namespace blink
-