1/*
2 * gdiplusmatrix.h
3 *
4 * GDI+ Matrix class
5 *
6 * This file is part of the w32api package.
7 *
8 * Contributors:
9 * Created by Markus Koenig <markus@stber-koenig.de>
10 *
11 * THIS SOFTWARE IS NOT COPYRIGHTED
12 *
13 * This source code is offered for use in the public domain. You may
14 * use, modify or distribute it freely.
15 *
16 * This code is distributed in the hope that it will be useful but
17 * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
18 * DISCLAIMED. This includes but is not limited to warranties of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 */
22
23#ifndef __GDIPLUS_MATRIX_H
24#define __GDIPLUS_MATRIX_H
25#if __GNUC__ >=3
26#pragma GCC system_header
27#endif
28
29#ifndef __cplusplus
30#error "A C++ compiler is required to include gdiplusmatrix.h."
31#endif
32
33#define GDIP_MATRIX_PI \
34 3.1415926535897932384626433832795028841971693993751058209749445923078164
35
36class Matrix: public GdiplusBase
37{
38 friend class Graphics;
39 friend class GraphicsPath;
40 friend class LinearGradientBrush;
41 friend class PathGradientBrush;
42 friend class Pen;
43 friend class Region;
44 friend class TextureBrush;
45
46public:
47 Matrix(): nativeMatrix(NULL), lastStatus(Ok)
48 {
49 lastStatus = DllExports::GdipCreateMatrix(&nativeMatrix);
50 }
51 Matrix(REAL m11, REAL m12, REAL m21, REAL m22, REAL dx, REAL dy):
52 nativeMatrix(NULL), lastStatus(Ok)
53 {
54 lastStatus = DllExports::GdipCreateMatrix2(
55 m11, m12, m21, m22, dx, dy,
56 &nativeMatrix);
57 }
58 Matrix(const RectF& rect, const PointF *dstplg):
59 nativeMatrix(NULL), lastStatus(Ok)
60 {
61 lastStatus = DllExports::GdipCreateMatrix3(
62 &rect, dstplg, &nativeMatrix);
63 }
64 Matrix(const Rect& rect, const Point *dstplg):
65 nativeMatrix(NULL), lastStatus(Ok)
66 {
67 lastStatus = DllExports::GdipCreateMatrix3I(
68 &rect, dstplg, &nativeMatrix);
69 }
70 ~Matrix()
71 {
72 DllExports::GdipDeleteMatrix(nativeMatrix);
73 }
74 Matrix* Clone() const
75 {
76 GpMatrix *cloneMatrix = NULL;
77 Status status = updateStatus(DllExports::GdipCloneMatrix(
78 nativeMatrix, &cloneMatrix));
79 if (status == Ok) {
80 Matrix *result = new Matrix(cloneMatrix, lastStatus);
81 if (!result) {
82 DllExports::GdipDeleteMatrix(cloneMatrix);
83 lastStatus = OutOfMemory;
84 }
85 return result;
86 } else {
87 return NULL;
88 }
89 }
90
91 BOOL Equals(const Matrix *matrix) const
92 {
93 BOOL result;
94 updateStatus(DllExports::GdipIsMatrixEqual(
95 nativeMatrix,
96 matrix ? matrix->nativeMatrix : NULL, &result));
97 return result;
98 }
99 Status GetElements(REAL *m) const
100 {
101 return updateStatus(DllExports::GdipGetMatrixElements(
102 nativeMatrix, m));
103 }
104 Status GetLastStatus() const
105 {
106 Status result = lastStatus;
107 lastStatus = Ok;
108 return result;
109 }
110 Status Invert()
111 {
112 return updateStatus(DllExports::GdipInvertMatrix(nativeMatrix));
113 }
114 BOOL IsIdentity() const
115 {
116 BOOL result;
117 updateStatus(DllExports::GdipIsMatrixIdentity(
118 nativeMatrix, &result));
119 return result;
120 }
121 BOOL IsInvertible() const
122 {
123 BOOL result;
124 updateStatus(DllExports::GdipIsMatrixInvertible(
125 nativeMatrix, &result));
126 return result;
127 }
128 Status Multiply(const Matrix *matrix,
129 MatrixOrder order = MatrixOrderPrepend)
130 {
131 return updateStatus(DllExports::GdipMultiplyMatrix(
132 nativeMatrix,
133 matrix ? matrix->nativeMatrix : NULL, order));
134 }
135 REAL OffsetX() const
136 {
137 REAL m[6];
138 updateStatus(DllExports::GdipGetMatrixElements(nativeMatrix, m));
139 return m[4];
140 }
141 REAL OffsetY() const
142 {
143 REAL m[6];
144 updateStatus(DllExports::GdipGetMatrixElements(nativeMatrix, m));
145 return m[5];
146 }
147 Status Reset()
148 {
149 return updateStatus(DllExports::GdipSetMatrixElements(
150 nativeMatrix,
151 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f));
152 }
153 Status Rotate(REAL angle, MatrixOrder order = MatrixOrderPrepend)
154 {
155 return updateStatus(DllExports::GdipRotateMatrix(
156 nativeMatrix, angle, order));
157 }
158 Status RotateAt(REAL angle, const PointF& center,
159 MatrixOrder order = MatrixOrderPrepend)
160 {
161 REAL angleRadian = angle * GDIP_MATRIX_PI / 180.0f;
162 REAL cosAngle = ::cos(angleRadian);
163 REAL sinAngle = ::sin(angleRadian);
164 REAL x = center.X;
165 REAL y = center.Y;
166
167 Matrix matrix2(cosAngle, sinAngle, -sinAngle, cosAngle,
168 x * (1.0f-cosAngle) + y * sinAngle,
169 -x * sinAngle + y * (1.0f-cosAngle));
170 Status status = matrix2.GetLastStatus();
171 if (status == Ok) {
172 return Multiply(&matrix2, order);
173 } else {
174 return lastStatus = status;
175 }
176 }
177 Status Scale(REAL scaleX, REAL scaleY,
178 MatrixOrder order = MatrixOrderPrepend)
179 {
180 return updateStatus(DllExports::GdipScaleMatrix(
181 nativeMatrix, scaleX, scaleY, order));
182 }
183 Status SetElements(REAL m11, REAL m12, REAL m21, REAL m22,
184 REAL dx, REAL dy)
185 {
186 return updateStatus(DllExports::GdipSetMatrixElements(
187 nativeMatrix, m11, m12, m21, m22, dx, dy));
188 }
189 Status Shear(REAL shearX, REAL shearY,
190 MatrixOrder order = MatrixOrderPrepend)
191 {
192 return updateStatus(DllExports::GdipShearMatrix(
193 nativeMatrix, shearX, shearY, order));
194 }
195 Status TransformPoints(PointF *pts, INT count = 1) const
196 {
197 return updateStatus(DllExports::GdipTransformMatrixPoints(
198 nativeMatrix, pts, count));
199 }
200 Status TransformPoints(Point *pts, INT count = 1) const
201 {
202 return updateStatus(DllExports::GdipTransformMatrixPointsI(
203 nativeMatrix, pts, count));
204 }
205 Status TransformVectors(PointF *pts, INT count = 1) const
206 {
207 return updateStatus(DllExports::GdipVectorTransformMatrixPoints(
208 nativeMatrix, pts, count));
209 }
210 Status TransformVectors(Point *pts, INT count = 1) const
211 {
212 return updateStatus(DllExports::GdipVectorTransformMatrixPointsI(
213 nativeMatrix, pts, count));
214 }
215 Status Translate(REAL offsetX, REAL offsetY,
216 MatrixOrder order = MatrixOrderPrepend)
217 {
218 return updateStatus(DllExports::GdipTranslateMatrix(
219 nativeMatrix, offsetX, offsetY, order));
220 }
221
222private:
223 Matrix(GpMatrix *matrix, Status status):
224 nativeMatrix(matrix), lastStatus(status) {}
225 Matrix(const Matrix&);
226 Matrix& operator=(const Matrix&);
227
228 Status updateStatus(Status newStatus) const
229 {
230 if (newStatus != Ok) lastStatus = newStatus;
231 return newStatus;
232 }
233
234 GpMatrix *nativeMatrix;
235 mutable Status lastStatus;
236};
237
238#undef GDIP_MATRIX_PI
239
240#endif /* __GDIPLUS_MATRIX_H */