| /* |
| * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "TransformOperations.h" |
| |
| #include "AnimationUtilities.h" |
| #include "IdentityTransformOperation.h" |
| #include "Matrix3DTransformOperation.h" |
| #include <algorithm> |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| TransformOperations::TransformOperations(bool makeIdentity) |
| { |
| if (makeIdentity) |
| m_operations.append(IdentityTransformOperation::create()); |
| } |
| |
| bool TransformOperations::operator==(const TransformOperations& o) const |
| { |
| if (m_operations.size() != o.m_operations.size()) |
| return false; |
| |
| unsigned s = m_operations.size(); |
| for (unsigned i = 0; i < s; i++) { |
| if (*m_operations[i] != *o.m_operations[i]) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void SharedPrimitivesPrefix::update(const TransformOperations& operations) |
| { |
| size_t maxIteration = operations.operations().size(); |
| if (m_indexOfFirstMismatch.has_value()) |
| maxIteration = std::min(*m_indexOfFirstMismatch, maxIteration); |
| |
| for (size_t i = 0; i < maxIteration; ++i) { |
| const auto* operation = operations.at(i); |
| |
| // If we haven't seen an operation at this index before, we can simply use our primitive type. |
| if (i >= m_primitives.size()) { |
| ASSERT(i == m_primitives.size()); |
| m_primitives.append(operation->primitiveType()); |
| continue; |
| } |
| |
| if (auto sharedPrimitive = operation->sharedPrimitiveType(m_primitives[i])) |
| m_primitives[i] = *sharedPrimitive; |
| else { |
| m_indexOfFirstMismatch = i; |
| m_primitives.shrink(i); |
| return; |
| } |
| } |
| } |
| |
| bool TransformOperations::affectedByTransformOrigin() const |
| { |
| for (const auto& operation : m_operations) { |
| if (operation->isAffectedByTransformOrigin()) |
| return true; |
| } |
| return false; |
| } |
| |
| bool TransformOperations::shouldFallBackToDiscreteAnimation(const TransformOperations& from, const LayoutSize& boxSize) const |
| { |
| return (from.hasMatrixOperation() || hasMatrixOperation()) && (!from.isInvertible(boxSize) || !isInvertible(boxSize)); |
| } |
| |
| TransformOperations TransformOperations::blend(const TransformOperations& from, const BlendingContext& context, const LayoutSize& boxSize, std::optional<unsigned> prefixLength) const |
| { |
| TransformOperations result; |
| |
| unsigned fromOperationCount = from.operations().size(); |
| unsigned toOperationCount = operations().size(); |
| unsigned maxOperationCount = std::max(fromOperationCount, toOperationCount); |
| |
| if (shouldFallBackToDiscreteAnimation(from, boxSize)) { |
| result.operations().append(createBlendedMatrixOperationFromOperationsSuffix(from, 0, context, boxSize)); |
| return result; |
| } |
| |
| for (unsigned i = 0; i < maxOperationCount; i++) { |
| RefPtr<TransformOperation> fromOperation = (i < fromOperationCount) ? from.operations()[i].get() : nullptr; |
| RefPtr<TransformOperation> toOperation = (i < toOperationCount) ? operations()[i].get() : nullptr; |
| if ((prefixLength && i >= *prefixLength) || (fromOperation && toOperation && !fromOperation->sharedPrimitiveType(toOperation.get()))) { |
| result.operations().append(createBlendedMatrixOperationFromOperationsSuffix(from, i, context, boxSize)); |
| return result; |
| } |
| |
| RefPtr<TransformOperation> blendedOperation; |
| if (fromOperation && toOperation) |
| blendedOperation = toOperation->blend(fromOperation.get(), context); |
| else if (!fromOperation) |
| blendedOperation = toOperation->blend(nullptr, 1 - context.progress, true); |
| else if (!toOperation) |
| blendedOperation = fromOperation->blend(nullptr, context, true); |
| |
| // We should have exited early above if the fromOperation and toOperation didn't share a transform |
| // function primitive, so blending the two operations should always yield a result. |
| ASSERT(blendedOperation); |
| result.operations().append(blendedOperation); |
| } |
| |
| return result; |
| } |
| |
| RefPtr<TransformOperation> TransformOperations::createBlendedMatrixOperationFromOperationsSuffix(const TransformOperations& from, unsigned start, const BlendingContext& context, const LayoutSize& referenceBoxSize) const |
| { |
| TransformationMatrix fromTransform; |
| from.apply(start, referenceBoxSize, fromTransform); |
| TransformationMatrix toTransform; |
| apply(start, referenceBoxSize, toTransform); |
| |
| auto progress = context.progress; |
| auto compositeOperation = context.compositeOperation; |
| if (shouldFallBackToDiscreteAnimation(from, referenceBoxSize)) { |
| progress = progress < 0.5 ? 0 : 1; |
| compositeOperation = CompositeOperation::Replace; |
| } |
| |
| toTransform.blend(fromTransform, progress, compositeOperation); |
| return Matrix3DTransformOperation::create(toTransform); |
| } |
| |
| TextStream& operator<<(TextStream& ts, const TransformOperations& ops) |
| { |
| for (const auto& operation : ops.operations()) |
| ts << *operation; |
| return ts; |
| } |
| |
| } // namespace WebCore |