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 GdipCreateMatrix(GpMatrix **matrix)
76 return InvalidParameter;
78 *matrix = GdipAlloc(sizeof(GpMatrix));
79 if(!*matrix) return OutOfMemory;
81 (*matrix)->matrix[0] = 1.0;
82 (*matrix)->matrix[1] = 0.0;
83 (*matrix)->matrix[2] = 0.0;
84 (*matrix)->matrix[3] = 1.0;
85 (*matrix)->matrix[4] = 0.0;
86 (*matrix)->matrix[5] = 0.0;
91 GpStatus WINGDIPAPI GdipDeleteMatrix(GpMatrix *matrix)
94 return InvalidParameter;
101 GpStatus WINGDIPAPI GdipMultiplyMatrix(GpMatrix *matrix, GpMatrix* matrix2,
104 if(!matrix || !matrix2)
105 return InvalidParameter;
107 if(order == MatrixOrderAppend)
108 matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
110 matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
115 GpStatus WINGDIPAPI GdipRotateMatrix(GpMatrix *matrix, REAL angle,
118 REAL cos_theta, sin_theta, rotate[6];
121 return InvalidParameter;
123 angle = deg2rad(angle);
124 cos_theta = cos(angle);
125 sin_theta = sin(angle);
127 rotate[0] = cos_theta;
128 rotate[1] = sin_theta;
129 rotate[2] = -sin_theta;
130 rotate[3] = cos_theta;
134 if(order == MatrixOrderAppend)
135 matrix_multiply(matrix->matrix, rotate, matrix->matrix);
137 matrix_multiply(rotate, matrix->matrix, matrix->matrix);
142 GpStatus WINGDIPAPI GdipScaleMatrix(GpMatrix *matrix, REAL scaleX, REAL scaleY,
148 return InvalidParameter;
157 if(order == MatrixOrderAppend)
158 matrix_multiply(matrix->matrix, scale, matrix->matrix);
160 matrix_multiply(scale, matrix->matrix, matrix->matrix);
165 GpStatus WINGDIPAPI GdipTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts,
172 return InvalidParameter;
174 for(i = 0; i < count; i++)
179 pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2] + matrix->matrix[4];
180 pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3] + matrix->matrix[5];
186 GpStatus WINGDIPAPI GdipTranslateMatrix(GpMatrix *matrix, REAL offsetX,
187 REAL offsetY, GpMatrixOrder order)
192 return InvalidParameter;
198 translate[4] = offsetX;
199 translate[5] = offsetY;
201 if(order == MatrixOrderAppend)
202 matrix_multiply(matrix->matrix, translate, matrix->matrix);
204 matrix_multiply(translate, matrix->matrix, matrix->matrix);