| /* |
| * Copyright (C) 2005-2016 Apple Inc. All rights reserved. |
| * 2010 Dirk Schulze <krit@webkit.org> |
| * |
| * 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 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 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. |
| */ |
| |
| #ifndef AffineTransform_h |
| #define AffineTransform_h |
| |
| #include <array> |
| #include <wtf/FastMalloc.h> |
| #include <wtf/Forward.h> |
| |
| #if USE(CG) |
| typedef struct CGAffineTransform CGAffineTransform; |
| #endif |
| |
| #if PLATFORM(WIN) |
| struct D2D_MATRIX_3X2_F; |
| typedef D2D_MATRIX_3X2_F D2D1_MATRIX_3X2_F; |
| #endif |
| |
| namespace WTF { |
| class TextStream; |
| } |
| |
| namespace WebCore { |
| |
| class FloatPoint; |
| class FloatQuad; |
| class FloatRect; |
| class FloatSize; |
| class IntPoint; |
| class IntSize; |
| class IntRect; |
| class Region; |
| class TransformationMatrix; |
| |
| class AffineTransform { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| WEBCORE_EXPORT AffineTransform(); |
| WEBCORE_EXPORT AffineTransform(double a, double b, double c, double d, double e, double f); |
| |
| #if USE(CG) |
| WEBCORE_EXPORT AffineTransform(const CGAffineTransform&); |
| #endif |
| |
| #if PLATFORM(WIN) |
| AffineTransform(const D2D1_MATRIX_3X2_F&); |
| #endif |
| |
| void setMatrix(double a, double b, double c, double d, double e, double f); |
| |
| void map(double x, double y, double& x2, double& y2) const; |
| |
| // Rounds the mapped point to the nearest integer value. |
| WEBCORE_EXPORT IntPoint mapPoint(const IntPoint&) const; |
| |
| WEBCORE_EXPORT FloatPoint mapPoint(const FloatPoint&) const; |
| |
| WEBCORE_EXPORT IntSize mapSize(const IntSize&) const; |
| |
| WEBCORE_EXPORT FloatSize mapSize(const FloatSize&) const; |
| |
| // Rounds the resulting mapped rectangle out. This is helpful for bounding |
| // box computations but may not be what is wanted in other contexts. |
| WEBCORE_EXPORT IntRect mapRect(const IntRect&) const; |
| |
| WEBCORE_EXPORT FloatRect mapRect(const FloatRect&) const; |
| WEBCORE_EXPORT FloatQuad mapQuad(const FloatQuad&) const; |
| |
| WEBCORE_EXPORT Region mapRegion(const Region&) const; |
| |
| WEBCORE_EXPORT bool isIdentity() const; |
| |
| double a() const { return m_transform[0]; } |
| void setA(double a) { m_transform[0] = a; } |
| double b() const { return m_transform[1]; } |
| void setB(double b) { m_transform[1] = b; } |
| double c() const { return m_transform[2]; } |
| void setC(double c) { m_transform[2] = c; } |
| double d() const { return m_transform[3]; } |
| void setD(double d) { m_transform[3] = d; } |
| double e() const { return m_transform[4]; } |
| void setE(double e) { m_transform[4] = e; } |
| double f() const { return m_transform[5]; } |
| void setF(double f) { m_transform[5] = f; } |
| |
| WEBCORE_EXPORT void makeIdentity(); |
| |
| WEBCORE_EXPORT AffineTransform& multiply(const AffineTransform& other); |
| WEBCORE_EXPORT AffineTransform& scale(double); |
| AffineTransform& scale(double sx, double sy); |
| WEBCORE_EXPORT AffineTransform& scaleNonUniform(double sx, double sy); // Same as scale(sx, sy). |
| WEBCORE_EXPORT AffineTransform& scale(const FloatSize&); |
| WEBCORE_EXPORT AffineTransform& rotate(double); |
| AffineTransform& rotateFromVector(double x, double y); |
| WEBCORE_EXPORT AffineTransform& translate(double tx, double ty); |
| WEBCORE_EXPORT AffineTransform& translate(const FloatPoint&); |
| WEBCORE_EXPORT AffineTransform& translate(const FloatSize&); |
| WEBCORE_EXPORT AffineTransform& shear(double sx, double sy); |
| WEBCORE_EXPORT AffineTransform& flipX(); |
| WEBCORE_EXPORT AffineTransform& flipY(); |
| WEBCORE_EXPORT AffineTransform& skew(double angleX, double angleY); |
| AffineTransform& skewX(double angle); |
| AffineTransform& skewY(double angle); |
| |
| // These functions get the length of an axis-aligned unit vector |
| // once it has been mapped through the transform |
| WEBCORE_EXPORT double xScale() const; |
| WEBCORE_EXPORT double yScale() const; |
| |
| bool isInvertible() const; // If you call this this, you're probably doing it wrong. |
| WEBCORE_EXPORT Optional<AffineTransform> inverse() const; |
| |
| WEBCORE_EXPORT void blend(const AffineTransform& from, double progress); |
| |
| WEBCORE_EXPORT TransformationMatrix toTransformationMatrix() const; |
| |
| bool isIdentityOrTranslation() const |
| { |
| return m_transform[0] == 1 && m_transform[1] == 0 && m_transform[2] == 0 && m_transform[3] == 1; |
| } |
| |
| bool isIdentityOrTranslationOrFlipped() const |
| { |
| return m_transform[0] == 1 && m_transform[1] == 0 && m_transform[2] == 0 && (m_transform[3] == 1 || m_transform[3] == -1); |
| } |
| |
| bool preservesAxisAlignment() const |
| { |
| return (m_transform[1] == 0 && m_transform[2] == 0) || (m_transform[0] == 0 && m_transform[3] == 0); |
| } |
| |
| bool operator== (const AffineTransform& m2) const |
| { |
| return (m_transform[0] == m2.m_transform[0] |
| && m_transform[1] == m2.m_transform[1] |
| && m_transform[2] == m2.m_transform[2] |
| && m_transform[3] == m2.m_transform[3] |
| && m_transform[4] == m2.m_transform[4] |
| && m_transform[5] == m2.m_transform[5]); |
| } |
| |
| bool operator!=(const AffineTransform& other) const { return !(*this == other); } |
| |
| // *this = *this * t (i.e., a multRight) |
| AffineTransform& operator*=(const AffineTransform& t) |
| { |
| return multiply(t); |
| } |
| |
| // result = *this * t (i.e., a multRight) |
| AffineTransform operator*(const AffineTransform& t) const |
| { |
| AffineTransform result = *this; |
| result *= t; |
| return result; |
| } |
| |
| #if USE(CG) |
| WEBCORE_EXPORT operator CGAffineTransform() const; |
| #endif |
| |
| #if PLATFORM(WIN) |
| operator D2D1_MATRIX_3X2_F() const; |
| #endif |
| |
| static AffineTransform translation(double x, double y) |
| { |
| return AffineTransform(1, 0, 0, 1, x, y); |
| } |
| |
| // decompose the matrix into its component parts |
| typedef struct { |
| double scaleX, scaleY; |
| double angle; |
| double remainderA, remainderB, remainderC, remainderD; |
| double translateX, translateY; |
| } DecomposedType; |
| |
| bool decompose(DecomposedType&) const; |
| void recompose(const DecomposedType&); |
| |
| private: |
| std::array<double, 6> m_transform; |
| }; |
| |
| WEBCORE_EXPORT AffineTransform makeMapBetweenRects(const FloatRect& source, const FloatRect& dest); |
| |
| WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const AffineTransform&); |
| |
| } |
| |
| #endif |