mirror of
https://github.com/classilla/tenfourfox.git
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179 lines
5.3 KiB
C++
179 lines
5.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_SVGTRANSFORM_H__
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#define MOZILLA_SVGTRANSFORM_H__
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#include "gfxMatrix.h"
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#include "nsDebug.h"
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namespace mozilla {
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// Transform Types
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static const unsigned short SVG_TRANSFORM_UNKNOWN = 0;
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static const unsigned short SVG_TRANSFORM_MATRIX = 1;
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static const unsigned short SVG_TRANSFORM_TRANSLATE = 2;
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static const unsigned short SVG_TRANSFORM_SCALE = 3;
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static const unsigned short SVG_TRANSFORM_ROTATE = 4;
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static const unsigned short SVG_TRANSFORM_SKEWX = 5;
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static const unsigned short SVG_TRANSFORM_SKEWY = 6;
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/*
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* The DOM wrapper class for this class is DOMSVGTransformMatrix.
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*/
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class nsSVGTransform
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{
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public:
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// Default ctor initialises to matrix type with identity matrix
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nsSVGTransform()
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: mMatrix() // Initialises to identity
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, mAngle(0.f)
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, mOriginX(0.f)
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, mOriginY(0.f)
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, mType(SVG_TRANSFORM_MATRIX)
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{ }
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explicit nsSVGTransform(const gfxMatrix& aMatrix)
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: mMatrix(aMatrix)
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, mAngle(0.f)
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, mOriginX(0.f)
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, mOriginY(0.f)
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, mType(SVG_TRANSFORM_MATRIX)
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{ }
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bool operator==(const nsSVGTransform& rhs) const {
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return mType == rhs.mType &&
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MatricesEqual(mMatrix, rhs.mMatrix) &&
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mAngle == rhs.mAngle &&
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mOriginX == rhs.mOriginX &&
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mOriginY == rhs.mOriginY;
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}
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void GetValueAsString(nsAString& aValue) const;
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float Angle() const {
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return mAngle;
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}
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void GetRotationOrigin(float& aOriginX, float& aOriginY) const {
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aOriginX = mOriginX;
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aOriginY = mOriginY;
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}
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uint16_t Type() const {
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return mType;
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}
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const gfxMatrix& GetMatrix() const { return mMatrix; }
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void SetMatrix(const gfxMatrix& aMatrix);
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void SetTranslate(float aTx, float aTy);
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void SetScale(float aSx, float aSy);
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void SetRotate(float aAngle, float aCx, float aCy);
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nsresult SetSkewX(float aAngle);
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nsresult SetSkewY(float aAngle);
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static bool MatricesEqual(const gfxMatrix& a, const gfxMatrix& b)
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{
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return a._11 == b._11 &&
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a._12 == b._12 &&
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a._21 == b._21 &&
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a._22 == b._22 &&
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a._31 == b._31 &&
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a._32 == b._32;
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}
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protected:
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gfxMatrix mMatrix;
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float mAngle, mOriginX, mOriginY;
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uint16_t mType;
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};
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/*
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* A slightly more light-weight version of nsSVGTransform for SMIL animation.
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*
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* Storing the parameters in an array (rather than a matrix) also allows simpler
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* (transform type-agnostic) interpolation and addition.
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*
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* The meaning of the mParams array depends on the transform type as follows:
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*
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* Type | mParams[0], mParams[1], mParams[2], ...
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* --------------------+-----------------------------------------
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* translate | tx, ty
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* scale | sx, sy
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* rotate | rotation-angle (in degrees), cx, cy
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* skewX | skew-angle (in degrees)
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* skewY | skew-angle (in degrees)
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* matrix | a, b, c, d, e, f
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*
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* The matrix type is never generated by animation code (it is only produced
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* when the user inserts one via the DOM) and often requires special handling
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* when we do encounter it. Therefore many users of this class are only
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* interested in the first three parameters and so we provide a special
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* constructor for setting those parameters only.
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*/
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class SVGTransformSMILData
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{
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public:
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// Number of float-params required in constructor, if constructing one of the
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// 'simple' transform types (all but matrix type)
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static const uint32_t NUM_SIMPLE_PARAMS = 3;
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// Number of float-params required in constructor for matrix type.
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// This is also the number of params we actually store, regardless of type.
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static const uint32_t NUM_STORED_PARAMS = 6;
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explicit SVGTransformSMILData(uint16_t aType)
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: mTransformType(aType)
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{
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MOZ_ASSERT(aType >= SVG_TRANSFORM_MATRIX && aType <= SVG_TRANSFORM_SKEWY,
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"Unexpected transform type");
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for (uint32_t i = 0; i < NUM_STORED_PARAMS; ++i) {
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mParams[i] = 0.f;
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}
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}
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SVGTransformSMILData(uint16_t aType, float (&aParams)[NUM_SIMPLE_PARAMS])
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: mTransformType(aType)
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{
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MOZ_ASSERT(aType >= SVG_TRANSFORM_TRANSLATE && aType <= SVG_TRANSFORM_SKEWY,
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"Expected 'simple' transform type");
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for (uint32_t i = 0; i < NUM_SIMPLE_PARAMS; ++i) {
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mParams[i] = aParams[i];
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}
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for (uint32_t i = NUM_SIMPLE_PARAMS; i < NUM_STORED_PARAMS; ++i) {
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mParams[i] = 0.f;
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}
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}
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// Conversion to/from a fully-fledged nsSVGTransform
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explicit SVGTransformSMILData(const nsSVGTransform& aTransform);
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nsSVGTransform ToSVGTransform() const;
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bool operator==(const SVGTransformSMILData& aOther) const
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{
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if (mTransformType != aOther.mTransformType)
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return false;
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for (uint32_t i = 0; i < NUM_STORED_PARAMS; ++i) {
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if (mParams[i] != aOther.mParams[i]) {
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return false;
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}
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}
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return true;
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}
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bool operator!=(const SVGTransformSMILData& aOther) const
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{
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return !(*this == aOther);
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}
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uint16_t mTransformType;
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float mParams[NUM_STORED_PARAMS];
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGTRANSFORM_H__
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