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/* |
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* gdiplusmatrix.h |
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* |
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* GDI+ Matrix class |
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* |
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* This file is part of the w32api package. |
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* |
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* Contributors: |
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* Created by Markus Koenig <markus@stber-koenig.de> |
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* |
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* THIS SOFTWARE IS NOT COPYRIGHTED |
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* |
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* This source code is offered for use in the public domain. You may |
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* use, modify or distribute it freely. |
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* |
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* This code is distributed in the hope that it will be useful but |
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* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY |
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* DISCLAIMED. This includes but is not limited to warranties of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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*/ |
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|
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#ifndef __GDIPLUS_MATRIX_H |
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#define __GDIPLUS_MATRIX_H |
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#if __GNUC__ >=3 |
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#pragma GCC system_header |
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#endif |
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|
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#ifndef __cplusplus |
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#error "A C++ compiler is required to include gdiplusmatrix.h." |
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#endif |
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|
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#define GDIP_MATRIX_PI \ |
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3.1415926535897932384626433832795028841971693993751058209749445923078164 |
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|
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class Matrix: public GdiplusBase |
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{ |
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friend class Graphics; |
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friend class GraphicsPath; |
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friend class LinearGradientBrush; |
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friend class PathGradientBrush; |
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friend class Pen; |
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friend class Region; |
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friend class TextureBrush; |
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|
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public: |
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Matrix(): nativeMatrix(NULL), lastStatus(Ok) |
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{ |
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lastStatus = DllExports::GdipCreateMatrix(&nativeMatrix); |
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} |
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Matrix(REAL m11, REAL m12, REAL m21, REAL m22, REAL dx, REAL dy): |
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nativeMatrix(NULL), lastStatus(Ok) |
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{ |
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lastStatus = DllExports::GdipCreateMatrix2( |
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m11, m12, m21, m22, dx, dy, |
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&nativeMatrix); |
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} |
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Matrix(const RectF& rect, const PointF *dstplg): |
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nativeMatrix(NULL), lastStatus(Ok) |
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{ |
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lastStatus = DllExports::GdipCreateMatrix3( |
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&rect, dstplg, &nativeMatrix); |
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} |
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Matrix(const Rect& rect, const Point *dstplg): |
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nativeMatrix(NULL), lastStatus(Ok) |
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{ |
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lastStatus = DllExports::GdipCreateMatrix3I( |
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&rect, dstplg, &nativeMatrix); |
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} |
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~Matrix() |
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{ |
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DllExports::GdipDeleteMatrix(nativeMatrix); |
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} |
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Matrix* Clone() const |
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{ |
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GpMatrix *cloneMatrix = NULL; |
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Status status = updateStatus(DllExports::GdipCloneMatrix( |
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nativeMatrix, &cloneMatrix)); |
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if (status == Ok) { |
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Matrix *result = new Matrix(cloneMatrix, lastStatus); |
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if (!result) { |
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DllExports::GdipDeleteMatrix(cloneMatrix); |
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lastStatus = OutOfMemory; |
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} |
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return result; |
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} else { |
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return NULL; |
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} |
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} |
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|
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BOOL Equals(const Matrix *matrix) const |
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{ |
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BOOL result; |
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updateStatus(DllExports::GdipIsMatrixEqual( |
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nativeMatrix, |
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matrix ? matrix->nativeMatrix : NULL, &result)); |
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return result; |
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} |
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Status GetElements(REAL *m) const |
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{ |
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return updateStatus(DllExports::GdipGetMatrixElements( |
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nativeMatrix, m)); |
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} |
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Status GetLastStatus() const |
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{ |
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Status result = lastStatus; |
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lastStatus = Ok; |
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return result; |
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} |
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Status Invert() |
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{ |
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return updateStatus(DllExports::GdipInvertMatrix(nativeMatrix)); |
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} |
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BOOL IsIdentity() const |
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{ |
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BOOL result; |
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updateStatus(DllExports::GdipIsMatrixIdentity( |
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nativeMatrix, &result)); |
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return result; |
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} |
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BOOL IsInvertible() const |
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{ |
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BOOL result; |
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updateStatus(DllExports::GdipIsMatrixInvertible( |
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nativeMatrix, &result)); |
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return result; |
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} |
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Status Multiply(const Matrix *matrix, |
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MatrixOrder order = MatrixOrderPrepend) |
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{ |
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return updateStatus(DllExports::GdipMultiplyMatrix( |
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nativeMatrix, |
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matrix ? matrix->nativeMatrix : NULL, order)); |
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} |
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REAL OffsetX() const |
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{ |
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REAL m[6]; |
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updateStatus(DllExports::GdipGetMatrixElements(nativeMatrix, m)); |
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return m[4]; |
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} |
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REAL OffsetY() const |
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{ |
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REAL m[6]; |
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updateStatus(DllExports::GdipGetMatrixElements(nativeMatrix, m)); |
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return m[5]; |
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} |
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Status Reset() |
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{ |
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return updateStatus(DllExports::GdipSetMatrixElements( |
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nativeMatrix, |
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1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f)); |
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} |
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Status Rotate(REAL angle, MatrixOrder order = MatrixOrderPrepend) |
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{ |
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return updateStatus(DllExports::GdipRotateMatrix( |
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nativeMatrix, angle, order)); |
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} |
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Status RotateAt(REAL angle, const PointF& center, |
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MatrixOrder order = MatrixOrderPrepend) |
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{ |
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REAL angleRadian = angle * GDIP_MATRIX_PI / 180.0f; |
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REAL cosAngle = ::cos(angleRadian); |
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REAL sinAngle = ::sin(angleRadian); |
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REAL x = center.X; |
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REAL y = center.Y; |
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|
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Matrix matrix2(cosAngle, sinAngle, -sinAngle, cosAngle, |
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x * (1.0f-cosAngle) + y * sinAngle, |
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-x * sinAngle + y * (1.0f-cosAngle)); |
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Status status = matrix2.GetLastStatus(); |
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if (status == Ok) { |
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return Multiply(&matrix2, order); |
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} else { |
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return lastStatus = status; |
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} |
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} |
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Status Scale(REAL scaleX, REAL scaleY, |
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MatrixOrder order = MatrixOrderPrepend) |
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{ |
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return updateStatus(DllExports::GdipScaleMatrix( |
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nativeMatrix, scaleX, scaleY, order)); |
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} |
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Status SetElements(REAL m11, REAL m12, REAL m21, REAL m22, |
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REAL dx, REAL dy) |
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{ |
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return updateStatus(DllExports::GdipSetMatrixElements( |
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nativeMatrix, m11, m12, m21, m22, dx, dy)); |
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} |
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Status Shear(REAL shearX, REAL shearY, |
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MatrixOrder order = MatrixOrderPrepend) |
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{ |
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return updateStatus(DllExports::GdipShearMatrix( |
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nativeMatrix, shearX, shearY, order)); |
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} |
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Status TransformPoints(PointF *pts, INT count = 1) const |
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{ |
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return updateStatus(DllExports::GdipTransformMatrixPoints( |
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nativeMatrix, pts, count)); |
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} |
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Status TransformPoints(Point *pts, INT count = 1) const |
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{ |
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return updateStatus(DllExports::GdipTransformMatrixPointsI( |
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nativeMatrix, pts, count)); |
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} |
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Status TransformVectors(PointF *pts, INT count = 1) const |
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{ |
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return updateStatus(DllExports::GdipVectorTransformMatrixPoints( |
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nativeMatrix, pts, count)); |
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} |
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Status TransformVectors(Point *pts, INT count = 1) const |
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{ |
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return updateStatus(DllExports::GdipVectorTransformMatrixPointsI( |
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nativeMatrix, pts, count)); |
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} |
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Status Translate(REAL offsetX, REAL offsetY, |
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MatrixOrder order = MatrixOrderPrepend) |
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{ |
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return updateStatus(DllExports::GdipTranslateMatrix( |
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nativeMatrix, offsetX, offsetY, order)); |
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} |
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|
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private: |
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Matrix(GpMatrix *matrix, Status status): |
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nativeMatrix(matrix), lastStatus(status) {} |
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Matrix(const Matrix&); |
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Matrix& operator=(const Matrix&); |
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|
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Status updateStatus(Status newStatus) const |
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{ |
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if (newStatus != Ok) lastStatus = newStatus; |
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return newStatus; |
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} |
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|
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GpMatrix *nativeMatrix; |
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mutable Status lastStatus; |
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}; |
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|
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#undef GDIP_MATRIX_PI |
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|
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#endif /* __GDIPLUS_MATRIX_H */ |
