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 GdipCreateMatrix3I(GDIPCONST GpRect *rect, GDIPCONST GpPoint *pt,
98 rectF.X = (REAL)rect->X;
99 rectF.Y = (REAL)rect->Y;
100 rectF.Width = (REAL)rect->Width;
101 rectF.Height = (REAL)rect->Height;
106 return GdipCreateMatrix3(&rectF, &ptF, matrix);
109 GpStatus WINGDIPAPI GdipCloneMatrix(GpMatrix *matrix, GpMatrix **clone)
111 if(!matrix || !clone)
112 return InvalidParameter;
114 *clone = GdipAlloc(sizeof(GpMatrix));
115 if(!*clone) return OutOfMemory;
122 GpStatus WINGDIPAPI GdipCreateMatrix(GpMatrix **matrix)
125 return InvalidParameter;
127 *matrix = GdipAlloc(sizeof(GpMatrix));
128 if(!*matrix) return OutOfMemory;
130 (*matrix)->matrix[0] = 1.0;
131 (*matrix)->matrix[1] = 0.0;
132 (*matrix)->matrix[2] = 0.0;
133 (*matrix)->matrix[3] = 1.0;
134 (*matrix)->matrix[4] = 0.0;
135 (*matrix)->matrix[5] = 0.0;
140 GpStatus WINGDIPAPI GdipDeleteMatrix(GpMatrix *matrix)
143 return InvalidParameter;
150 GpStatus WINGDIPAPI GdipGetMatrixElements(GDIPCONST GpMatrix *matrix,
154 return InvalidParameter;
156 memcpy(out, matrix->matrix, sizeof(matrix->matrix));
161 GpStatus WINGDIPAPI GdipMultiplyMatrix(GpMatrix *matrix, GpMatrix* matrix2,
164 if(!matrix || !matrix2)
165 return InvalidParameter;
167 if(order == MatrixOrderAppend)
168 matrix_multiply(matrix->matrix, matrix2->matrix, matrix->matrix);
170 matrix_multiply(matrix2->matrix, matrix->matrix, matrix->matrix);
175 GpStatus WINGDIPAPI GdipRotateMatrix(GpMatrix *matrix, REAL angle,
178 REAL cos_theta, sin_theta, rotate[6];
181 return InvalidParameter;
183 angle = deg2rad(angle);
184 cos_theta = cos(angle);
185 sin_theta = sin(angle);
187 rotate[0] = cos_theta;
188 rotate[1] = sin_theta;
189 rotate[2] = -sin_theta;
190 rotate[3] = cos_theta;
194 if(order == MatrixOrderAppend)
195 matrix_multiply(matrix->matrix, rotate, matrix->matrix);
197 matrix_multiply(rotate, matrix->matrix, matrix->matrix);
202 GpStatus WINGDIPAPI GdipScaleMatrix(GpMatrix *matrix, REAL scaleX, REAL scaleY,
208 return InvalidParameter;
217 if(order == MatrixOrderAppend)
218 matrix_multiply(matrix->matrix, scale, matrix->matrix);
220 matrix_multiply(scale, matrix->matrix, matrix->matrix);
225 GpStatus WINGDIPAPI GdipSetMatrixElements(GpMatrix *matrix, REAL m11, REAL m12,
226 REAL m21, REAL m22, REAL dx, REAL dy)
229 return InvalidParameter;
231 matrix->matrix[0] = m11;
232 matrix->matrix[1] = m12;
233 matrix->matrix[2] = m21;
234 matrix->matrix[3] = m22;
235 matrix->matrix[4] = dx;
236 matrix->matrix[5] = dy;
241 GpStatus WINGDIPAPI GdipTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts,
247 if(!matrix || !pts || count <= 0)
248 return InvalidParameter;
250 for(i = 0; i < count; i++)
255 pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2] + matrix->matrix[4];
256 pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3] + matrix->matrix[5];
262 GpStatus WINGDIPAPI GdipTransformMatrixPointsI(GpMatrix *matrix, GpPoint *pts, INT count)
269 return InvalidParameter;
271 ptsF = GdipAlloc(sizeof(GpPointF) * count);
275 for(i = 0; i < count; i++){
276 ptsF[i].X = (REAL)pts[i].X;
277 ptsF[i].Y = (REAL)pts[i].Y;
280 ret = GdipTransformMatrixPoints(matrix, ptsF, count);
283 for(i = 0; i < count; i++){
284 pts[i].X = roundr(ptsF[i].X);
285 pts[i].Y = roundr(ptsF[i].Y);
292 GpStatus WINGDIPAPI GdipTranslateMatrix(GpMatrix *matrix, REAL offsetX,
293 REAL offsetY, GpMatrixOrder order)
298 return InvalidParameter;
304 translate[4] = offsetX;
305 translate[5] = offsetY;
307 if(order == MatrixOrderAppend)
308 matrix_multiply(matrix->matrix, translate, matrix->matrix);
310 matrix_multiply(translate, matrix->matrix, matrix->matrix);
315 GpStatus WINGDIPAPI GdipVectorTransformMatrixPoints(GpMatrix *matrix, GpPointF *pts, INT count)
320 if(!matrix || !pts || count <= 0)
321 return InvalidParameter;
323 for(i = 0; i < count; i++)
328 pts[i].X = x * matrix->matrix[0] + y * matrix->matrix[2];
329 pts[i].Y = x * matrix->matrix[1] + y * matrix->matrix[3];
335 GpStatus WINGDIPAPI GdipVectorTransformMatrixPointsI(GpMatrix *matrix, GpPoint *pts, INT count)
342 return InvalidParameter;
344 ptsF = GdipAlloc(sizeof(GpPointF) * count);
348 for(i = 0; i < count; i++){
349 ptsF[i].X = (REAL)pts[i].X;
350 ptsF[i].Y = (REAL)pts[i].Y;
353 ret = GdipVectorTransformMatrixPoints(matrix, ptsF, count);
356 for(i = 0; i < count; i++){
357 pts[i].X = roundr(ptsF[i].X);
358 pts[i].Y = roundr(ptsF[i].Y);
365 GpStatus WINGDIPAPI GdipIsMatrixEqual(GDIPCONST GpMatrix *matrix, GDIPCONST GpMatrix *matrix2,
368 if(!matrix || !matrix2 || !result)
369 return InvalidParameter;
370 /* based on single array member of GpMatrix */
371 *result = (memcmp(matrix->matrix, matrix2->matrix, sizeof(GpMatrix)) == 0);
376 GpStatus WINGDIPAPI GdipIsMatrixIdentity(GDIPCONST GpMatrix *matrix, BOOL *result)
382 if(!matrix || !result)
383 return InvalidParameter;
385 ret = GdipCreateMatrix(&e);
386 if(ret != Ok) return ret;
388 ret = GdipIsMatrixEqual(matrix, e, &isIdentity);
390 *result = isIdentity;