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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /dom/svg/SVGLengthListSMILType.cpp | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/svg/SVGLengthListSMILType.cpp')
-rw-r--r-- | dom/svg/SVGLengthListSMILType.cpp | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/dom/svg/SVGLengthListSMILType.cpp b/dom/svg/SVGLengthListSMILType.cpp new file mode 100644 index 0000000000..0f96d51eb0 --- /dev/null +++ b/dom/svg/SVGLengthListSMILType.cpp @@ -0,0 +1,294 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "SVGLengthListSMILType.h" + +#include "mozilla/FloatingPoint.h" +#include "mozilla/SMILValue.h" +#include "nsMathUtils.h" +#include "SVGLengthList.h" +#include <math.h> +#include <algorithm> + +namespace mozilla { + +/*static*/ +SVGLengthListSMILType SVGLengthListSMILType::sSingleton; + +//---------------------------------------------------------------------- +// nsISMILType implementation + +void SVGLengthListSMILType::Init(SMILValue& aValue) const { + MOZ_ASSERT(aValue.IsNull(), "Unexpected value type"); + + aValue.mU.mPtr = new SVGLengthListAndInfo(); + aValue.mType = this; +} + +void SVGLengthListSMILType::Destroy(SMILValue& aValue) const { + MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value type"); + delete static_cast<SVGLengthListAndInfo*>(aValue.mU.mPtr); + aValue.mU.mPtr = nullptr; + aValue.mType = SMILNullType::Singleton(); +} + +nsresult SVGLengthListSMILType::Assign(SMILValue& aDest, + const SMILValue& aSrc) const { + MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types"); + MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value"); + + const SVGLengthListAndInfo* src = + static_cast<const SVGLengthListAndInfo*>(aSrc.mU.mPtr); + SVGLengthListAndInfo* dest = + static_cast<SVGLengthListAndInfo*>(aDest.mU.mPtr); + + return dest->CopyFrom(*src); +} + +bool SVGLengthListSMILType::IsEqual(const SMILValue& aLeft, + const SMILValue& aRight) const { + MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types"); + MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value"); + + return *static_cast<const SVGLengthListAndInfo*>(aLeft.mU.mPtr) == + *static_cast<const SVGLengthListAndInfo*>(aRight.mU.mPtr); +} + +nsresult SVGLengthListSMILType::Add(SMILValue& aDest, + const SMILValue& aValueToAdd, + uint32_t aCount) const { + MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL type"); + MOZ_ASSERT(aValueToAdd.mType == this, "Incompatible SMIL type"); + + SVGLengthListAndInfo& dest = + *static_cast<SVGLengthListAndInfo*>(aDest.mU.mPtr); + const SVGLengthListAndInfo& valueToAdd = + *static_cast<const SVGLengthListAndInfo*>(aValueToAdd.mU.mPtr); + + // To understand this code, see the comments documenting our Init() method, + // and documenting SVGLengthListAndInfo::CanZeroPadList(). + + // Note that *this* method actually may safely zero pad a shorter list + // regardless of the value returned by CanZeroPadList() for that list, + // just so long as the shorter list is being added *to* the longer list + // and *not* vice versa! It's okay in the case of adding a shorter list to a + // longer list because during the add operation we'll end up adding the + // zeros to actual specified values. It's *not* okay in the case of adding a + // longer list to a shorter list because then we end up adding to implicit + // zeros when we'd actually need to add to whatever the underlying values + // should be, not zeros, and those values are not explicit or otherwise + // available. + + if (valueToAdd.IsIdentity()) { // Adding identity value - no-op + return NS_OK; + } + + if (dest.IsIdentity()) { // Adding *to* an identity value + if (!dest.SetLength(valueToAdd.Length())) { + return NS_ERROR_OUT_OF_MEMORY; + } + for (uint32_t i = 0; i < dest.Length(); ++i) { + dest[i].SetValueAndUnit(valueToAdd[i].GetValueInCurrentUnits() * aCount, + valueToAdd[i].GetUnit()); + } + dest.SetInfo( + valueToAdd.Element(), valueToAdd.Axis(), + valueToAdd.CanZeroPadList()); // propagate target element info! + return NS_OK; + } + MOZ_ASSERT(dest.Element() == valueToAdd.Element(), + "adding values from different elements...?"); + + // Zero-pad our |dest| list, if necessary. + if (dest.Length() < valueToAdd.Length()) { + if (!dest.CanZeroPadList()) { + // SVGContentUtils::ReportToConsole + return NS_ERROR_FAILURE; + } + + MOZ_ASSERT(valueToAdd.CanZeroPadList(), + "values disagree about attribute's zero-paddibility"); + + uint32_t i = dest.Length(); + if (!dest.SetLength(valueToAdd.Length())) { + return NS_ERROR_OUT_OF_MEMORY; + } + for (; i < valueToAdd.Length(); ++i) { + dest[i].SetValueAndUnit(0.0f, valueToAdd[i].GetUnit()); + } + } + + for (uint32_t i = 0; i < valueToAdd.Length(); ++i) { + float valToAdd; + if (dest[i].GetUnit() == valueToAdd[i].GetUnit()) { + valToAdd = valueToAdd[i].GetValueInCurrentUnits(); + } else { + // If units differ, we use the unit of the item in 'dest'. + // We leave it to the frame code to check that values are finite. + valToAdd = valueToAdd[i].GetValueInSpecifiedUnit( + dest[i].GetUnit(), dest.Element(), dest.Axis()); + } + dest[i].SetValueAndUnit( + dest[i].GetValueInCurrentUnits() + valToAdd * aCount, + dest[i].GetUnit()); + } + + // propagate target element info! + dest.SetInfo(valueToAdd.Element(), valueToAdd.Axis(), + dest.CanZeroPadList() && valueToAdd.CanZeroPadList()); + + return NS_OK; +} + +nsresult SVGLengthListSMILType::ComputeDistance(const SMILValue& aFrom, + const SMILValue& aTo, + double& aDistance) const { + MOZ_ASSERT(aFrom.mType == this, "Unexpected SMIL type"); + MOZ_ASSERT(aTo.mType == this, "Incompatible SMIL type"); + + const SVGLengthListAndInfo& from = + *static_cast<const SVGLengthListAndInfo*>(aFrom.mU.mPtr); + const SVGLengthListAndInfo& to = + *static_cast<const SVGLengthListAndInfo*>(aTo.mU.mPtr); + + // To understand this code, see the comments documenting our Init() method, + // and documenting SVGLengthListAndInfo::CanZeroPadList(). + + NS_ASSERTION((from.CanZeroPadList() == to.CanZeroPadList()) || + (from.CanZeroPadList() && from.IsEmpty()) || + (to.CanZeroPadList() && to.IsEmpty()), + "Only \"zero\" SMILValues from the SMIL engine should " + "return true for CanZeroPadList() when the attribute " + "being animated can't be zero padded"); + + if ((from.Length() < to.Length() && !from.CanZeroPadList()) || + (to.Length() < from.Length() && !to.CanZeroPadList())) { + // SVGContentUtils::ReportToConsole + return NS_ERROR_FAILURE; + } + + // We return the root of the sum of the squares of the deltas between the + // user unit values of the lengths at each correspanding index. In the + // general case, paced animation is probably not useful, but this strategy at + // least does the right thing for paced animation in the face of simple + // 'values' lists such as: + // + // values="100 200 300; 101 201 301; 110 210 310" + // + // I.e. half way through the simple duration we'll get "105 205 305". + + double total = 0.0; + + uint32_t i = 0; + for (; i < from.Length() && i < to.Length(); ++i) { + double f = from[i].GetValueInPixels(from.Element(), from.Axis()); + double t = to[i].GetValueInPixels(to.Element(), to.Axis()); + double delta = t - f; + total += delta * delta; + } + + // In the case that from.Length() != to.Length(), one of the following loops + // will run. (OK since CanZeroPadList()==true for the other list.) + + for (; i < from.Length(); ++i) { + double f = from[i].GetValueInPixels(from.Element(), from.Axis()); + total += f * f; + } + for (; i < to.Length(); ++i) { + double t = to[i].GetValueInPixels(to.Element(), to.Axis()); + total += t * t; + } + + float distance = sqrt(total); + if (!std::isfinite(distance)) { + return NS_ERROR_FAILURE; + } + aDistance = distance; + return NS_OK; +} + +nsresult SVGLengthListSMILType::Interpolate(const SMILValue& aStartVal, + const SMILValue& aEndVal, + double aUnitDistance, + SMILValue& aResult) const { + MOZ_ASSERT(aStartVal.mType == aEndVal.mType, + "Trying to interpolate different types"); + MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation"); + MOZ_ASSERT(aResult.mType == this, "Unexpected result type"); + + const SVGLengthListAndInfo& start = + *static_cast<const SVGLengthListAndInfo*>(aStartVal.mU.mPtr); + const SVGLengthListAndInfo& end = + *static_cast<const SVGLengthListAndInfo*>(aEndVal.mU.mPtr); + SVGLengthListAndInfo& result = + *static_cast<SVGLengthListAndInfo*>(aResult.mU.mPtr); + + // To understand this code, see the comments documenting our Init() method, + // and documenting SVGLengthListAndInfo::CanZeroPadList(). + + NS_ASSERTION((start.CanZeroPadList() == end.CanZeroPadList()) || + (start.CanZeroPadList() && start.IsEmpty()) || + (end.CanZeroPadList() && end.IsEmpty()), + "Only \"zero\" SMILValues from the SMIL engine should " + "return true for CanZeroPadList() when the attribute " + "being animated can't be zero padded"); + + if ((start.Length() < end.Length() && !start.CanZeroPadList()) || + (end.Length() < start.Length() && !end.CanZeroPadList())) { + // SVGContentUtils::ReportToConsole + return NS_ERROR_FAILURE; + } + + if (!result.SetLength(std::max(start.Length(), end.Length()))) { + return NS_ERROR_OUT_OF_MEMORY; + } + + // If units differ, we use the unit of the nearest item. + // We leave it to the frame code to check that values are finite. + bool useEndUnits = (aUnitDistance > 0.5); + + uint32_t i = 0; + for (; i < start.Length() && i < end.Length(); ++i) { + float s, e; + uint8_t unit; + if (start[i].GetUnit() == end[i].GetUnit()) { + unit = start[i].GetUnit(); + s = start[i].GetValueInCurrentUnits(); + e = end[i].GetValueInCurrentUnits(); + } else if (useEndUnits) { + unit = end[i].GetUnit(); + s = start[i].GetValueInSpecifiedUnit(unit, end.Element(), end.Axis()); + e = end[i].GetValueInCurrentUnits(); + } else { + unit = start[i].GetUnit(); + s = start[i].GetValueInCurrentUnits(); + e = end[i].GetValueInSpecifiedUnit(unit, start.Element(), start.Axis()); + } + result[i].SetValueAndUnit(s + (e - s) * aUnitDistance, unit); + } + + // In the case that start.Length() != end.Length(), one of the following + // loops will run. (Okay, since CanZeroPadList()==true for the other list.) + + for (; i < start.Length(); ++i) { + result[i].SetValueAndUnit( + start[i].GetValueInCurrentUnits() - + start[i].GetValueInCurrentUnits() * aUnitDistance, + start[i].GetUnit()); + } + for (; i < end.Length(); ++i) { + result[i].SetValueAndUnit(end[i].GetValueInCurrentUnits() * aUnitDistance, + end[i].GetUnit()); + } + + // propagate target element info! + result.SetInfo(end.Element(), end.Axis(), + start.CanZeroPadList() && end.CanZeroPadList()); + + return NS_OK; +} + +} // namespace mozilla |