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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_basegfx.hxx"
26 
27 #include <basegfx/matrix/b2dhommatrixtools.hxx>
28 #include <rtl/ustring.hxx>
29 #include <rtl/ustrbuf.hxx>
30 
31 ///////////////////////////////////////////////////////////////////////////////
32 
33 namespace basegfx
34 {
35     ::rtl::OUString exportToSvg( const B2DHomMatrix& rMatrix )
36     {
37         rtl::OUStringBuffer aStrBuf;
38         aStrBuf.appendAscii("matrix(");
39 
40         aStrBuf.append(rMatrix.get(0,0));
41         aStrBuf.appendAscii(", ");
42 
43         aStrBuf.append(rMatrix.get(1,0));
44         aStrBuf.appendAscii(", ");
45 
46         aStrBuf.append(rMatrix.get(0,1));
47         aStrBuf.appendAscii(", ");
48 
49         aStrBuf.append(rMatrix.get(1,1));
50         aStrBuf.appendAscii(", ");
51 
52         aStrBuf.append(rMatrix.get(0,2));
53         aStrBuf.appendAscii(", ");
54 
55         aStrBuf.append(rMatrix.get(1,2));
56         aStrBuf.appendAscii(")");
57 
58         return aStrBuf.makeStringAndClear();
59     }
60 
61 	namespace tools
62 	{
63 		void createSinCosOrthogonal(double& o_rSin, double& o_rCos, double fRadiant)
64 		{
65 			if( fTools::equalZero( fmod( fRadiant, F_PI2 ) ) )
66 			{
67 				// determine quadrant
68 				const sal_Int32 nQuad(
69 					(4 + fround( 4/F_2PI*fmod( fRadiant, F_2PI ) )) % 4 );
70 				switch( nQuad )
71 				{
72 					case 0: // -2pi,0,2pi
73 						o_rSin = 0.0;
74 						o_rCos = 1.0;
75 						break;
76 
77 					case 1: // -3/2pi,1/2pi
78 						o_rSin = 1.0;
79 						o_rCos = 0.0;
80 						break;
81 
82 					case 2: // -pi,pi
83 						o_rSin = 0.0;
84 						o_rCos = -1.0;
85 						break;
86 
87 					case 3: // -1/2pi,3/2pi
88 						o_rSin = -1.0;
89 						o_rCos = 0.0;
90 						break;
91 
92 					default:
93 						OSL_ENSURE( false, "createSinCos: Impossible case reached" );
94 				}
95 			}
96 			else
97 			{
98 				// TODO(P1): Maybe use glibc's sincos here (though
99 				// that's kinda non-portable...)
100 				o_rSin = sin(fRadiant);
101 				o_rCos = cos(fRadiant);
102 			}
103 		}
104 
105 		B2DHomMatrix createScaleB2DHomMatrix(double fScaleX, double fScaleY)
106 		{
107 			B2DHomMatrix aRetval;
108 			const double fOne(1.0);
109 
110 			if(!fTools::equal(fScaleX, fOne))
111 			{
112 				aRetval.set(0, 0, fScaleX);
113 			}
114 
115 			if(!fTools::equal(fScaleY, fOne))
116 			{
117 				aRetval.set(1, 1, fScaleY);
118 			}
119 
120 			return aRetval;
121 		}
122 
123 		B2DHomMatrix createShearXB2DHomMatrix(double fShearX)
124 		{
125 			B2DHomMatrix aRetval;
126 
127 			if(!fTools::equalZero(fShearX))
128 			{
129 				aRetval.set(0, 1, fShearX);
130 			}
131 
132 			return aRetval;
133 		}
134 
135 		B2DHomMatrix createShearYB2DHomMatrix(double fShearY)
136 		{
137 			B2DHomMatrix aRetval;
138 
139 			if(!fTools::equalZero(fShearY))
140 			{
141 				aRetval.set(1, 0, fShearY);
142 			}
143 
144 			return aRetval;
145 		}
146 
147 		B2DHomMatrix createRotateB2DHomMatrix(double fRadiant)
148 		{
149 			B2DHomMatrix aRetval;
150 
151 			if(!fTools::equalZero(fRadiant))
152 			{
153 				double fSin(0.0);
154 				double fCos(1.0);
155 
156 				createSinCosOrthogonal(fSin, fCos, fRadiant);
157 				aRetval.set(0, 0, fCos);
158 				aRetval.set(1, 1, fCos);
159 				aRetval.set(1, 0, fSin);
160 				aRetval.set(0, 1, -fSin);
161 			}
162 
163 			return aRetval;
164 		}
165 
166 		B2DHomMatrix createTranslateB2DHomMatrix(double fTranslateX, double fTranslateY)
167 		{
168 			B2DHomMatrix aRetval;
169 
170 			if(!(fTools::equalZero(fTranslateX) && fTools::equalZero(fTranslateY)))
171 			{
172 				aRetval.set(0, 2, fTranslateX);
173 				aRetval.set(1, 2, fTranslateY);
174 			}
175 
176 			return aRetval;
177 		}
178 
179 		B2DHomMatrix createScaleShearXRotateTranslateB2DHomMatrix(
180 			double fScaleX, double fScaleY,
181 			double fShearX,
182 			double fRadiant,
183 			double fTranslateX, double fTranslateY)
184 		{
185 			const double fOne(1.0);
186 
187 			if(fTools::equal(fScaleX, fOne) && fTools::equal(fScaleY, fOne))
188 			{
189 				/// no scale, take shortcut
190 				return createShearXRotateTranslateB2DHomMatrix(fShearX, fRadiant, fTranslateX, fTranslateY);
191 			}
192 			else
193 			{
194 				/// scale used
195 				if(fTools::equalZero(fShearX))
196 				{
197 					/// no shear
198 					if(fTools::equalZero(fRadiant))
199 					{
200 						/// no rotate, take shortcut
201 						return createScaleTranslateB2DHomMatrix(fScaleX, fScaleY, fTranslateX, fTranslateY);
202 					}
203 					else
204 					{
205 						/// rotate and scale used, no shear
206 						double fSin(0.0);
207 						double fCos(1.0);
208 
209 						createSinCosOrthogonal(fSin, fCos, fRadiant);
210 
211 						B2DHomMatrix aRetval(
212 							/* Row 0, Column 0 */ fCos * fScaleX,
213 							/* Row 0, Column 1 */ fScaleY * -fSin,
214 							/* Row 0, Column 2 */ fTranslateX,
215 							/* Row 1, Column 0 */ fSin * fScaleX,
216 							/* Row 1, Column 1 */ fScaleY * fCos,
217 							/* Row 1, Column 2 */ fTranslateY);
218 
219 						return aRetval;
220 					}
221 				}
222 				else
223 				{
224 					/// scale and shear used
225 					if(fTools::equalZero(fRadiant))
226 					{
227 						/// scale and shear, but no rotate
228 						B2DHomMatrix aRetval(
229 							/* Row 0, Column 0 */ fScaleX,
230 							/* Row 0, Column 1 */ fScaleY * fShearX,
231 							/* Row 0, Column 2 */ fTranslateX,
232 							/* Row 1, Column 0 */ 0.0,
233 							/* Row 1, Column 1 */ fScaleY,
234 							/* Row 1, Column 2 */ fTranslateY);
235 
236 						return aRetval;
237 					}
238 					else
239 					{
240 						/// scale, shear and rotate used
241 						double fSin(0.0);
242 						double fCos(1.0);
243 
244 						createSinCosOrthogonal(fSin, fCos, fRadiant);
245 
246 						B2DHomMatrix aRetval(
247 							/* Row 0, Column 0 */ fCos * fScaleX,
248 							/* Row 0, Column 1 */ fScaleY * ((fCos * fShearX) - fSin),
249 							/* Row 0, Column 2 */ fTranslateX,
250 							/* Row 1, Column 0 */ fSin * fScaleX,
251 							/* Row 1, Column 1 */ fScaleY * ((fSin * fShearX) + fCos),
252 							/* Row 1, Column 2 */ fTranslateY);
253 
254 						return aRetval;
255 					}
256 				}
257 			}
258 		}
259 
260 		B2DHomMatrix createShearXRotateTranslateB2DHomMatrix(
261 			double fShearX,
262 			double fRadiant,
263 			double fTranslateX, double fTranslateY)
264 		{
265 			if(fTools::equalZero(fShearX))
266 			{
267 				/// no shear
268 				if(fTools::equalZero(fRadiant))
269 				{
270 					/// no shear, no rotate, take shortcut
271 					return createTranslateB2DHomMatrix(fTranslateX, fTranslateY);
272 				}
273 				else
274 				{
275 					/// no shear, but rotate used
276 					double fSin(0.0);
277 					double fCos(1.0);
278 
279 					createSinCosOrthogonal(fSin, fCos, fRadiant);
280 
281 					B2DHomMatrix aRetval(
282 						/* Row 0, Column 0 */ fCos,
283 						/* Row 0, Column 1 */ -fSin,
284 						/* Row 0, Column 2 */ fTranslateX,
285 						/* Row 1, Column 0 */ fSin,
286 						/* Row 1, Column 1 */ fCos,
287 						/* Row 1, Column 2 */ fTranslateY);
288 
289 					return aRetval;
290 				}
291 			}
292 			else
293 			{
294 				/// shear used
295 				if(fTools::equalZero(fRadiant))
296 				{
297 					/// no rotate, but shear used
298 					B2DHomMatrix aRetval(
299 						/* Row 0, Column 0 */ 1.0,
300 						/* Row 0, Column 1 */ fShearX,
301 						/* Row 0, Column 2 */ fTranslateX,
302 						/* Row 1, Column 0 */ 0.0,
303 						/* Row 1, Column 1 */ 1.0,
304 						/* Row 1, Column 2 */ fTranslateY);
305 
306 					return aRetval;
307 				}
308 				else
309 				{
310 					/// shear and rotate used
311 					double fSin(0.0);
312 					double fCos(1.0);
313 
314 					createSinCosOrthogonal(fSin, fCos, fRadiant);
315 
316 					B2DHomMatrix aRetval(
317 						/* Row 0, Column 0 */ fCos,
318 						/* Row 0, Column 1 */ (fCos * fShearX) - fSin,
319 						/* Row 0, Column 2 */ fTranslateX,
320 						/* Row 1, Column 0 */ fSin,
321 						/* Row 1, Column 1 */ (fSin * fShearX) + fCos,
322 						/* Row 1, Column 2 */ fTranslateY);
323 
324 					return aRetval;
325 				}
326 			}
327 		}
328 
329 		B2DHomMatrix createScaleTranslateB2DHomMatrix(
330 			double fScaleX, double fScaleY,
331 			double fTranslateX, double fTranslateY)
332 		{
333 			const double fOne(1.0);
334 
335 			if(fTools::equal(fScaleX, fOne) && fTools::equal(fScaleY, fOne))
336 			{
337 				/// no scale, take shortcut
338 				return createTranslateB2DHomMatrix(fTranslateX, fTranslateY);
339 			}
340 			else
341 			{
342 				/// scale used
343 				if(fTools::equalZero(fTranslateX) && fTools::equalZero(fTranslateY))
344 				{
345 					/// no translate, but scale.
346 					B2DHomMatrix aRetval;
347 
348 					aRetval.set(0, 0, fScaleX);
349 					aRetval.set(1, 1, fScaleY);
350 
351 					return aRetval;
352 				}
353 				else
354 				{
355 					/// translate and scale
356 					B2DHomMatrix aRetval(
357 						/* Row 0, Column 0 */ fScaleX,
358 						/* Row 0, Column 1 */ 0.0,
359 						/* Row 0, Column 2 */ fTranslateX,
360 						/* Row 1, Column 0 */ 0.0,
361 						/* Row 1, Column 1 */ fScaleY,
362 						/* Row 1, Column 2 */ fTranslateY);
363 
364 					return aRetval;
365 				}
366 			}
367 		}
368 
369         B2DHomMatrix createRotateAroundPoint(
370             double fPointX, double fPointY,
371             double fRadiant)
372         {
373 			B2DHomMatrix aRetval;
374 
375 			if(!fTools::equalZero(fRadiant))
376 			{
377                 double fSin(0.0);
378 				double fCos(1.0);
379 
380 				createSinCosOrthogonal(fSin, fCos, fRadiant);
381 
382                 aRetval.set3x2(
383 					/* Row 0, Column 0 */ fCos,
384 					/* Row 0, Column 1 */ -fSin,
385 					/* Row 0, Column 2 */ (fPointX * (1.0 - fCos)) + (fSin * fPointY),
386 					/* Row 1, Column 0 */ fSin,
387 					/* Row 1, Column 1 */ fCos,
388 					/* Row 1, Column 2 */ (fPointY * (1.0 - fCos)) - (fSin * fPointX));
389             }
390 
391             return aRetval;
392         }
393     } // end of namespace tools
394 } // end of namespace basegfx
395 
396 ///////////////////////////////////////////////////////////////////////////////
397 // eof
398