diff options
Diffstat (limited to 'dom/svg/SVGTransform.cpp')
| -rw-r--r-- | dom/svg/SVGTransform.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/dom/svg/SVGTransform.cpp b/dom/svg/SVGTransform.cpp new file mode 100644 index 0000000000..c993253c4c --- /dev/null +++ b/dom/svg/SVGTransform.cpp @@ -0,0 +1,212 @@ +/* -*- 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 "SVGTransform.h" + +#include "nsError.h" +#include "nsContentUtils.h" // for NS_ENSURE_FINITE +#include "nsTextFormatter.h" + +namespace { +const double kRadPerDegree = 2.0 * M_PI / 360.0; +} // namespace + +namespace mozilla { + +using namespace dom::SVGTransform_Binding; + +void SVGTransform::GetValueAsString(nsAString& aValue) const { + switch (mType) { + case SVG_TRANSFORM_TRANSLATE: + // The spec say that if Y is not provided, it is assumed to be zero. + if (mMatrix._32 != 0) + nsTextFormatter::ssprintf(aValue, u"translate(%g, %g)", mMatrix._31, + mMatrix._32); + else + nsTextFormatter::ssprintf(aValue, u"translate(%g)", mMatrix._31); + break; + case SVG_TRANSFORM_ROTATE: + if (mOriginX != 0.0f || mOriginY != 0.0f) + nsTextFormatter::ssprintf(aValue, u"rotate(%g, %g, %g)", mAngle, + mOriginX, mOriginY); + else + nsTextFormatter::ssprintf(aValue, u"rotate(%g)", mAngle); + break; + case SVG_TRANSFORM_SCALE: + if (mMatrix._11 != mMatrix._22) + nsTextFormatter::ssprintf(aValue, u"scale(%g, %g)", mMatrix._11, + mMatrix._22); + else + nsTextFormatter::ssprintf(aValue, u"scale(%g)", mMatrix._11); + break; + case SVG_TRANSFORM_SKEWX: + nsTextFormatter::ssprintf(aValue, u"skewX(%g)", mAngle); + break; + case SVG_TRANSFORM_SKEWY: + nsTextFormatter::ssprintf(aValue, u"skewY(%g)", mAngle); + break; + case SVG_TRANSFORM_MATRIX: + nsTextFormatter::ssprintf(aValue, u"matrix(%g, %g, %g, %g, %g, %g)", + mMatrix._11, mMatrix._12, mMatrix._21, + mMatrix._22, mMatrix._31, mMatrix._32); + break; + default: + aValue.Truncate(); + NS_ERROR("unknown transformation type"); + break; + } +} + +void SVGTransform::SetMatrix(const gfxMatrix& aMatrix) { + mType = SVG_TRANSFORM_MATRIX; + mMatrix = aMatrix; + // We set the other members here too, since operator== requires it and + // the DOM requires it for mAngle. + mAngle = 0.f; + mOriginX = 0.f; + mOriginY = 0.f; +} + +void SVGTransform::SetTranslate(float aTx, float aTy) { + mType = SVG_TRANSFORM_TRANSLATE; + mMatrix = gfxMatrix::Translation(aTx, aTy); + mAngle = 0.f; + mOriginX = 0.f; + mOriginY = 0.f; +} + +void SVGTransform::SetScale(float aSx, float aSy) { + mType = SVG_TRANSFORM_SCALE; + mMatrix = gfxMatrix::Scaling(aSx, aSy); + mAngle = 0.f; + mOriginX = 0.f; + mOriginY = 0.f; +} + +void SVGTransform::SetRotate(float aAngle, float aCx, float aCy) { + mType = SVG_TRANSFORM_ROTATE; + mMatrix = gfxMatrix::Translation(aCx, aCy) + .PreRotate(aAngle * kRadPerDegree) + .PreTranslate(-aCx, -aCy); + mAngle = aAngle; + mOriginX = aCx; + mOriginY = aCy; +} + +nsresult SVGTransform::SetSkewX(float aAngle) { + double ta = tan(aAngle * kRadPerDegree); + // No one actually cares about the exact error return type here. + NS_ENSURE_FINITE(ta, NS_ERROR_INVALID_ARG); + + mType = SVG_TRANSFORM_SKEWX; + mMatrix = gfxMatrix(); + mMatrix._21 = ta; + mAngle = aAngle; + mOriginX = 0.f; + mOriginY = 0.f; + return NS_OK; +} + +nsresult SVGTransform::SetSkewY(float aAngle) { + double ta = tan(aAngle * kRadPerDegree); + // No one actually cares about the exact error return type here. + NS_ENSURE_FINITE(ta, NS_ERROR_INVALID_ARG); + + mType = SVG_TRANSFORM_SKEWY; + mMatrix = gfxMatrix(); + mMatrix._12 = ta; + mAngle = aAngle; + mOriginX = 0.f; + mOriginY = 0.f; + return NS_OK; +} + +SVGTransformSMILData::SVGTransformSMILData(const SVGTransform& aTransform) + : mTransformType(aTransform.Type()) { + MOZ_ASSERT(mTransformType >= SVG_TRANSFORM_MATRIX && + mTransformType <= SVG_TRANSFORM_SKEWY, + "Unexpected transform type"); + + for (uint32_t i = 0; i < NUM_STORED_PARAMS; ++i) { + mParams[i] = 0.f; + } + + switch (mTransformType) { + case SVG_TRANSFORM_MATRIX: { + const gfxMatrix& mx = aTransform.GetMatrix(); + mParams[0] = static_cast<float>(mx._11); + mParams[1] = static_cast<float>(mx._12); + mParams[2] = static_cast<float>(mx._21); + mParams[3] = static_cast<float>(mx._22); + mParams[4] = static_cast<float>(mx._31); + mParams[5] = static_cast<float>(mx._32); + break; + } + case SVG_TRANSFORM_TRANSLATE: { + const gfxMatrix& mx = aTransform.GetMatrix(); + mParams[0] = static_cast<float>(mx._31); + mParams[1] = static_cast<float>(mx._32); + break; + } + case SVG_TRANSFORM_SCALE: { + const gfxMatrix& mx = aTransform.GetMatrix(); + mParams[0] = static_cast<float>(mx._11); + mParams[1] = static_cast<float>(mx._22); + break; + } + case SVG_TRANSFORM_ROTATE: + mParams[0] = aTransform.Angle(); + aTransform.GetRotationOrigin(mParams[1], mParams[2]); + break; + + case SVG_TRANSFORM_SKEWX: + case SVG_TRANSFORM_SKEWY: + mParams[0] = aTransform.Angle(); + break; + + default: + MOZ_ASSERT_UNREACHABLE("Unexpected transform type"); + break; + } +} + +SVGTransform SVGTransformSMILData::ToSVGTransform() const { + SVGTransform result; + + switch (mTransformType) { + case SVG_TRANSFORM_MATRIX: + result.SetMatrix(gfxMatrix(mParams[0], mParams[1], mParams[2], mParams[3], + mParams[4], mParams[5])); + break; + + case SVG_TRANSFORM_TRANSLATE: + result.SetTranslate(mParams[0], mParams[1]); + break; + + case SVG_TRANSFORM_SCALE: + result.SetScale(mParams[0], mParams[1]); + break; + + case SVG_TRANSFORM_ROTATE: + result.SetRotate(mParams[0], mParams[1], mParams[2]); + break; + + case SVG_TRANSFORM_SKEWX: + result.SetSkewX(mParams[0]); + break; + + case SVG_TRANSFORM_SKEWY: + result.SetSkewY(mParams[0]); + break; + + default: + MOZ_ASSERT_UNREACHABLE("Unexpected transform type"); + break; + } + return result; +} + +} // namespace mozilla |