2 * Copyright (C) 2007 Google (Evan Stade)
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
29 #include "gdiplus_private.h"
31 /* Multiplies two matrices of the form
37 * and puts the output in out.
39 static void matrix_multiply(GDIPCONST REAL * left, GDIPCONST REAL * right, REAL * out)
44 for(i = 0; i < 6; i++){
46 temp[i] = left[i - odd] * right[odd] + left[i - odd + 1] * right[odd + 2] +
47 (i >= 4 ? right[odd + 4] : 0.0);
50 memcpy(out, temp, 6 * sizeof(REAL));
53 GpStatus WINGDIPAPI GdipCreateMatrix2(REAL m11, REAL m12, REAL m21, REAL m22,
54 REAL dx, REAL dy, GpMatrix **matrix)
57 return InvalidParameter;
59 *matrix = GdipAlloc(sizeof(GpMatrix));
60 if(!*matrix) return OutOfMemory;
63 (*matrix)->matrix[0] = m11;
64 (*matrix)->matrix[1] = m12;
66 (*matrix)->matrix[2] = m21;
67 (*matrix)->matrix[3] = m22;
69 (*matrix)->matrix[4] = dx;
70 (*matrix)->matrix[5] = dy;
75 GpStatus WINGDIPAPI GdipCreateMatrix3(GDIPCONST GpRectF *rect,
76 GDIPCONST GpPointF *pt, GpMatrix **matrix)
79 return InvalidParameter;
81 *matrix = GdipAlloc(sizeof(GpMatrix));
82 if(!*matrix) return OutOfMemory;
84 memcpy((*matrix)->matrix, rect, 4 * sizeof(REAL));
86 (*matrix)->matrix[4] = pt->X;
87 (*matrix)->matrix[5] = pt->Y;
92 GpStatus WINGDIPAPI GdipCloneMatrix(GpMatrix *matrix, GpMatrix **clone)
95 return InvalidParameter;
97 *clone = GdipAlloc(sizeof(GpMatrix));
98 if(!*clone) return OutOfMemory;
100 memcpy(*clone, matrix, sizeof(GpMatrix));
105 GpStatus WINGDIPAPI GdipCreateMatrix(GpMatrix **matrix)
108 return InvalidParameter;
110 *matrix = GdipAlloc(sizeof(GpMatrix));
111 if(!*matrix) return OutOfMemory;
113 (*matrix)->matrix[0] = 1.0;
114 (*matrix)->matrix[1] = 0.0;
115 (*matrix)->matrix[2] = 0.0;
116 (*matrix)->matrix[3] = 1.0;
117 (*matrix)->matrix[4] = 0.0;
118 (*matrix)->matrix[5] = 0.0;
123 GpStatus WINGDIPAPI GdipDeleteMatrix(GpMatrix *matrix)
126 return InvalidParameter;
133 GpStatus WINGDIPAPI GdipGetMatrixElements(GDIPCONST GpMatrix *matrix,
137 return InvalidParameter;
139 memcpy(out, matrix->matrix, sizeof(matrix->matrix));
144 GpStatus WINGDIPAPI GdipMultiplyMatrix(GpMatrix *matrix, GpMatrix* matrix2,
147 if(!matrix || !matrix2)
148 return InvalidParameter;
150 if(order == MatrixOrderAppend)
151 matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
153 matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
158 GpStatus WINGDIPAPI GdipRotateMatrix(GpMatrix *matrix, REAL angle,
161 REAL cos_theta, sin_theta, rotate[6];
164 return InvalidParameter;
166 angle = deg2rad(angle);
167 cos_theta = cos(angle);
168 sin_theta = sin(angle);
170 rotate[0] = cos_theta;
171 rotate[1] = sin_theta;
172 rotate[2] = -sin_theta;
173 rotate[3] = cos_theta;
177 if(order == MatrixOrderAppend)
178 matrix_multiply(matrix->matrix, rotate, matrix->matrix);
180 matrix_multiply(rotate, matrix->matrix, matrix->matrix);
185 GpStatus WINGDIPAPI GdipScaleMatrix(GpMatrix *matrix, REAL scaleX, REAL scaleY,
191 return InvalidParameter;
200 if(order == MatrixOrderAppend)
201 matrix_multiply(matrix->matrix, scale, matrix->matrix);
203 matrix_multiply(scale, matrix->matrix, matrix->matrix);
208 GpStatus WINGDIPAPI GdipSetMatrixElements(GpMatrix *matrix, REAL m11, REAL m12,
209 REAL m21, REAL m22, REAL dx, REAL dy)
212 return InvalidParameter;
214 matrix->matrix[0] = m11;
215 matrix->matrix[1] = m12;
216 matrix->matrix[2] = m21;
217 matrix->matrix[3] = m22;
218 matrix->matrix[4] = dx;
219 matrix->matrix[5] = dy;
224 GpStatus WINGDIPAPI GdipTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts,
231 return InvalidParameter;
233 for(i = 0; i < count; i++)
238 pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2] + matrix->matrix[4];
239 pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3] + matrix->matrix[5];
245 GpStatus WINGDIPAPI GdipTranslateMatrix(GpMatrix *matrix, REAL offsetX,
246 REAL offsetY, GpMatrixOrder order)
251 return InvalidParameter;
257 translate[4] = offsetX;
258 translate[5] = offsetY;
260 if(order == MatrixOrderAppend)
261 matrix_multiply(matrix->matrix, translate, matrix->matrix);
263 matrix_multiply(translate, matrix->matrix, matrix->matrix);