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
27 #include "gdiplus_private.h"
29 /* Multiplies two matrices of the form
35 * and puts the output in out.
37 static void matrix_multiply(GDIPCONST REAL * left, GDIPCONST REAL * right, REAL * out)
42 for(i = 0; i < 6; i++){
44 temp[i] = left[i - odd] * right[odd] + left[i - odd + 1] * right[odd + 2] +
45 (i >= 4 ? right[odd + 4] : 0.0);
48 memcpy(out, temp, 6 * sizeof(REAL));
51 GpStatus WINGDIPAPI GdipCreateMatrix2(REAL m11, REAL m12, REAL m21, REAL m22,
52 REAL dx, REAL dy, GpMatrix **matrix)
55 return InvalidParameter;
57 *matrix = GdipAlloc(sizeof(GpMatrix));
58 if(!*matrix) return OutOfMemory;
61 (*matrix)->matrix[0] = m11;
62 (*matrix)->matrix[1] = m12;
64 (*matrix)->matrix[2] = m21;
65 (*matrix)->matrix[3] = m22;
67 (*matrix)->matrix[4] = dx;
68 (*matrix)->matrix[5] = dy;
73 GpStatus WINGDIPAPI GdipCloneMatrix(GpMatrix *matrix, GpMatrix **clone)
76 return InvalidParameter;
78 *clone = GdipAlloc(sizeof(GpMatrix));
79 if(!*clone) return OutOfMemory;
81 memcpy(*clone, matrix, sizeof(GpMatrix));
86 GpStatus WINGDIPAPI GdipCreateMatrix(GpMatrix **matrix)
89 return InvalidParameter;
91 *matrix = GdipAlloc(sizeof(GpMatrix));
92 if(!*matrix) return OutOfMemory;
94 (*matrix)->matrix[0] = 1.0;
95 (*matrix)->matrix[1] = 0.0;
96 (*matrix)->matrix[2] = 0.0;
97 (*matrix)->matrix[3] = 1.0;
98 (*matrix)->matrix[4] = 0.0;
99 (*matrix)->matrix[5] = 0.0;
104 GpStatus WINGDIPAPI GdipDeleteMatrix(GpMatrix *matrix)
107 return InvalidParameter;
114 GpStatus WINGDIPAPI GdipMultiplyMatrix(GpMatrix *matrix, GpMatrix* matrix2,
117 if(!matrix || !matrix2)
118 return InvalidParameter;
120 if(order == MatrixOrderAppend)
121 matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
123 matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
128 GpStatus WINGDIPAPI GdipRotateMatrix(GpMatrix *matrix, REAL angle,
131 REAL cos_theta, sin_theta, rotate[6];
134 return InvalidParameter;
136 angle = deg2rad(angle);
137 cos_theta = cos(angle);
138 sin_theta = sin(angle);
140 rotate[0] = cos_theta;
141 rotate[1] = sin_theta;
142 rotate[2] = -sin_theta;
143 rotate[3] = cos_theta;
147 if(order == MatrixOrderAppend)
148 matrix_multiply(matrix->matrix, rotate, matrix->matrix);
150 matrix_multiply(rotate, matrix->matrix, matrix->matrix);
155 GpStatus WINGDIPAPI GdipScaleMatrix(GpMatrix *matrix, REAL scaleX, REAL scaleY,
161 return InvalidParameter;
170 if(order == MatrixOrderAppend)
171 matrix_multiply(matrix->matrix, scale, matrix->matrix);
173 matrix_multiply(scale, matrix->matrix, matrix->matrix);
178 GpStatus WINGDIPAPI GdipTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts,
185 return InvalidParameter;
187 for(i = 0; i < count; i++)
192 pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2] + matrix->matrix[4];
193 pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3] + matrix->matrix[5];
199 GpStatus WINGDIPAPI GdipTranslateMatrix(GpMatrix *matrix, REAL offsetX,
200 REAL offsetY, GpMatrixOrder order)
205 return InvalidParameter;
211 translate[4] = offsetX;
212 translate[5] = offsetY;
214 if(order == MatrixOrderAppend)
215 matrix_multiply(matrix->matrix, translate, matrix->matrix);
217 matrix_multiply(translate, matrix->matrix, matrix->matrix);