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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: metafile.cpp | |
3 | // Purpose: wxMetaFile, wxMetaFileDC etc. These classes are optional. | |
4 | // Author: David Webster | |
5 | // Modified by: | |
6 | // Created: 10/10/99 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) David Webster | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // For compilers that support precompilation, includes "wx.h". | |
13 | #include "wx/wxprec.h" | |
14 | ||
15 | #ifndef WX_PRECOMP | |
16 | #include "wx/setup.h" | |
17 | #endif | |
18 | ||
19 | #if wxUSE_METAFILE | |
20 | ||
21 | #ifndef WX_PRECOMP | |
22 | #include "wx/utils.h" | |
23 | #include "wx/app.h" | |
24 | #endif | |
25 | ||
26 | #include "wx/metafile.h" | |
27 | #include "wx/clipbrd.h" | |
28 | #include "wx/os2/private.h" | |
29 | ||
30 | #include <stdio.h> | |
31 | #include <string.h> | |
32 | ||
33 | extern bool wxClipboardIsOpen; | |
34 | ||
35 | IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject) | |
36 | IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC) | |
37 | ||
38 | /* | |
39 | * Metafiles | |
40 | * Currently, the only purpose for making a metafile is to put | |
41 | * it on the clipboard. | |
42 | */ | |
43 | ||
44 | wxMetafileRefData::wxMetafileRefData(void) | |
45 | { | |
46 | m_metafile = 0; | |
47 | m_windowsMappingMode = wxMM_ANISOTROPIC; | |
48 | } | |
49 | ||
50 | wxMetafileRefData::~wxMetafileRefData(void) | |
51 | { | |
52 | if (m_metafile) | |
53 | { | |
54 | // TODO: DeleteMetaFile((HMETAFILE) m_metafile); | |
55 | m_metafile = 0; | |
56 | } | |
57 | } | |
58 | ||
59 | wxMetafile::wxMetafile(const wxString& file) | |
60 | { | |
61 | m_refData = new wxMetafileRefData; | |
62 | ||
63 | M_METAFILEDATA->m_windowsMappingMode = wxMM_ANISOTROPIC; | |
64 | M_METAFILEDATA->m_metafile = 0; | |
65 | if (!file.IsNull() && (file.Cmp(wxT("")) == 0)) | |
66 | M_METAFILEDATA->m_metafile = (WXHANDLE)0; // TODO: GetMetaFile(file); | |
67 | } | |
68 | ||
69 | wxMetafile::~wxMetafile(void) | |
70 | { | |
71 | } | |
72 | ||
73 | bool wxMetafile::SetClipboard(int width, int height) | |
74 | { | |
75 | if (!m_refData) | |
76 | return FALSE; | |
77 | ||
78 | bool alreadyOpen=wxClipboardOpen(); | |
79 | if (!alreadyOpen) | |
80 | { | |
81 | wxOpenClipboard(); | |
82 | if (!wxEmptyClipboard()) return FALSE; | |
83 | } | |
84 | bool success = wxSetClipboardData(wxDF_METAFILE, this, width,height); | |
85 | if (!alreadyOpen) wxCloseClipboard(); | |
86 | return (bool) success; | |
87 | } | |
88 | ||
89 | bool wxMetafile::Play(wxDC *dc) | |
90 | { | |
91 | if (!m_refData) | |
92 | return FALSE; | |
93 | ||
94 | dc->BeginDrawing(); | |
95 | ||
96 | // if (dc->GetHDC() && M_METAFILEDATA->m_metafile) | |
97 | // PlayMetaFile((HDC) dc->GetHDC(), (HMETAFILE) M_METAFILEDATA->m_metafile); | |
98 | ||
99 | dc->EndDrawing(); | |
100 | ||
101 | return TRUE; | |
102 | } | |
103 | ||
104 | void wxMetafile::SetHMETAFILE(WXHANDLE mf) | |
105 | { | |
106 | if (m_refData) | |
107 | m_refData = new wxMetafileRefData; | |
108 | ||
109 | M_METAFILEDATA->m_metafile = mf; | |
110 | } | |
111 | ||
112 | void wxMetafile::SetWindowsMappingMode(int mm) | |
113 | { | |
114 | if (m_refData) | |
115 | m_refData = new wxMetafileRefData; | |
116 | ||
117 | M_METAFILEDATA->m_windowsMappingMode = mm; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Metafile device context | |
122 | * | |
123 | */ | |
124 | ||
125 | // Original constructor that does not takes origin and extent. If you use this, | |
126 | // *DO* give origin/extent arguments to wxMakeMetafilePlaceable. | |
127 | wxMetafileDC::wxMetafileDC(const wxString& file) | |
128 | { | |
129 | m_metaFile = NULL; | |
130 | m_minX = 10000; | |
131 | m_minY = 10000; | |
132 | m_maxX = -10000; | |
133 | m_maxY = -10000; | |
134 | // m_title = NULL; | |
135 | ||
136 | if (!file.IsNull() && wxFileExists(file)) | |
137 | wxRemoveFile(file); | |
138 | ||
139 | // TODO | |
140 | /* | |
141 | if (!file.IsNull() && (file != wxT(""))) | |
142 | m_hDC = (WXHDC) CreateMetaFile(file); | |
143 | else | |
144 | m_hDC = (WXHDC) CreateMetaFile(NULL); | |
145 | */ | |
146 | ||
147 | m_ok = (m_hDC != (WXHDC) 0) ; | |
148 | ||
149 | // Actual Windows mapping mode, for future reference. | |
150 | m_windowsMappingMode = wxMM_TEXT; | |
151 | ||
152 | SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct) | |
153 | } | |
154 | ||
155 | // New constructor that takes origin and extent. If you use this, don't | |
156 | // give origin/extent arguments to wxMakeMetafilePlaceable. | |
157 | wxMetafileDC::wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg) | |
158 | { | |
159 | m_minX = 10000; | |
160 | m_minY = 10000; | |
161 | m_maxX = -10000; | |
162 | m_maxY = -10000; | |
163 | if (file != wxT("") && wxFileExists(file)) wxRemoveFile(file); | |
164 | // m_hDC = (WXHDC) CreateMetaFile(file); | |
165 | ||
166 | m_ok = TRUE; | |
167 | ||
168 | // ::SetWindowOrgEx((HDC) m_hDC,xorg,yorg, NULL); | |
169 | // ::SetWindowExtEx((HDC) m_hDC,xext,yext, NULL); | |
170 | ||
171 | // Actual Windows mapping mode, for future reference. | |
172 | m_windowsMappingMode = wxMM_ANISOTROPIC; | |
173 | ||
174 | SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct) | |
175 | } | |
176 | ||
177 | wxMetafileDC::~wxMetafileDC(void) | |
178 | { | |
179 | m_hDC = 0; | |
180 | } | |
181 | ||
182 | void wxMetafileDC::GetTextExtent(const wxString& string, long *x, long *y, | |
183 | long *descent, long *externalLeading, wxFont *theFont, bool use16bit) const | |
184 | { | |
185 | wxFont *fontToUse = theFont; | |
186 | if (!fontToUse) | |
187 | fontToUse = (wxFont*) &m_font; | |
188 | ||
189 | // TODO: | |
190 | /* | |
191 | HDC dc = GetDC(NULL); | |
192 | ||
193 | SIZE sizeRect; | |
194 | TEXTMETRIC tm; | |
195 | GetTextExtentPoint(dc, WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect); | |
196 | GetTextMetrics(dc, &tm); | |
197 | ||
198 | ReleaseDC(NULL, dc); | |
199 | ||
200 | if ( x ) | |
201 | *x = sizeRect.cx; | |
202 | if ( y ) | |
203 | *y = sizeRect.cy; | |
204 | if ( descent ) | |
205 | *descent = tm.tmDescent; | |
206 | if ( externalLeading ) | |
207 | *externalLeading = tm.tmExternalLeading; | |
208 | */ | |
209 | } | |
210 | ||
211 | wxMetafile *wxMetafileDC::Close(void) | |
212 | { | |
213 | SelectOldObjects(m_hDC); | |
214 | HANDLE mf = 0; // TODO: CloseMetaFile((HDC) m_hDC); | |
215 | m_hDC = 0; | |
216 | if (mf) | |
217 | { | |
218 | wxMetafile *wx_mf = new wxMetafile; | |
219 | wx_mf->SetHMETAFILE((WXHANDLE) mf); | |
220 | wx_mf->SetWindowsMappingMode(m_windowsMappingMode); | |
221 | return wx_mf; | |
222 | } | |
223 | return NULL; | |
224 | } | |
225 | ||
226 | void wxMetafileDC::SetMapMode(int mode) | |
227 | { | |
228 | m_mappingMode = mode; | |
229 | ||
230 | // int pixel_width = 0; | |
231 | // int pixel_height = 0; | |
232 | // int mm_width = 0; | |
233 | // int mm_height = 0; | |
234 | ||
235 | float mm2pixelsX = 10.0; | |
236 | float mm2pixelsY = 10.0; | |
237 | ||
238 | switch (mode) | |
239 | { | |
240 | case wxMM_TWIPS: | |
241 | { | |
242 | m_logicalScaleX = (float)(twips2mm * mm2pixelsX); | |
243 | m_logicalScaleY = (float)(twips2mm * mm2pixelsY); | |
244 | break; | |
245 | } | |
246 | case wxMM_POINTS: | |
247 | { | |
248 | m_logicalScaleX = (float)(pt2mm * mm2pixelsX); | |
249 | m_logicalScaleY = (float)(pt2mm * mm2pixelsY); | |
250 | break; | |
251 | } | |
252 | case wxMM_METRIC: | |
253 | { | |
254 | m_logicalScaleX = mm2pixelsX; | |
255 | m_logicalScaleY = mm2pixelsY; | |
256 | break; | |
257 | } | |
258 | case wxMM_LOMETRIC: | |
259 | { | |
260 | m_logicalScaleX = (float)(mm2pixelsX/10.0); | |
261 | m_logicalScaleY = (float)(mm2pixelsY/10.0); | |
262 | break; | |
263 | } | |
264 | default: | |
265 | case wxMM_TEXT: | |
266 | { | |
267 | m_logicalScaleX = 1.0; | |
268 | m_logicalScaleY = 1.0; | |
269 | break; | |
270 | } | |
271 | } | |
272 | m_windowExtX = 100; | |
273 | m_windowExtY = 100; | |
274 | } | |
275 | ||
276 | #ifdef __WIN32__ | |
277 | struct RECT32 | |
278 | { | |
279 | short left; | |
280 | short top; | |
281 | short right; | |
282 | short bottom; | |
283 | }; | |
284 | ||
285 | struct mfPLACEABLEHEADER { | |
286 | DWORD key; | |
287 | short hmf; | |
288 | RECT32 bbox; | |
289 | WORD inch; | |
290 | DWORD reserved; | |
291 | WORD checksum; | |
292 | }; | |
293 | #else | |
294 | struct mfPLACEABLEHEADER { | |
295 | DWORD key; | |
296 | HANDLE hmf; | |
297 | RECT bbox; | |
298 | WORD inch; | |
299 | DWORD reserved; | |
300 | WORD checksum; | |
301 | }; | |
302 | #endif | |
303 | ||
304 | /* | |
305 | * Pass filename of existing non-placeable metafile, and bounding box. | |
306 | * Adds a placeable metafile header, sets the mapping mode to anisotropic, | |
307 | * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode. | |
308 | * | |
309 | */ | |
310 | ||
311 | bool wxMakeMetafilePlaceable(const wxString& filename, float scale) | |
312 | { | |
313 | return wxMakeMetafilePlaceable(filename, 0, 0, 0, 0, scale, FALSE); | |
314 | } | |
315 | ||
316 | bool wxMakeMetafilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent) | |
317 | { | |
318 | // TODO: the OS/2 PM/MM way to do this | |
319 | /* | |
320 | // I'm not sure if this is the correct way of suggesting a scale | |
321 | // to the client application, but it's the only way I can find. | |
322 | int unitsPerInch = (int)(576/scale); | |
323 | ||
324 | mfPLACEABLEHEADER header; | |
325 | header.key = 0x9AC6CDD7L; | |
326 | header.hmf = 0; | |
327 | header.bbox.xLeft = (int)(x1); | |
328 | header.bbox.yTop = (int)(y1); | |
329 | header.bbox.xRight = (int)(x2); | |
330 | header.bbox.yBottom = (int)(y2); | |
331 | header.inch = unitsPerInch; | |
332 | header.reserved = 0; | |
333 | ||
334 | // Calculate checksum | |
335 | WORD *p; | |
336 | mfPLACEABLEHEADER *pMFHead = &header; | |
337 | for (p =(WORD *)pMFHead,pMFHead -> checksum = 0; | |
338 | p < (WORD *)&pMFHead ->checksum; ++p) | |
339 | pMFHead ->checksum ^= *p; | |
340 | ||
341 | FILE *fd = fopen(filename.fn_str(), "rb"); | |
342 | if (!fd) return FALSE; | |
343 | ||
344 | wxChar tempFileBuf[256]; | |
345 | wxGetTempFileName(wxT("mf"), tempFileBuf); | |
346 | FILE *fHandle = fopen(wxConvFile.cWX2MB(tempFileBuf), "wb"); | |
347 | if (!fHandle) | |
348 | return FALSE; | |
349 | fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle); | |
350 | ||
351 | // Calculate origin and extent | |
352 | int originX = x1; | |
353 | int originY = y1; | |
354 | int extentX = x2 - x1; | |
355 | int extentY = (y2 - y1); | |
356 | ||
357 | // Read metafile header and write | |
358 | METAHEADER metaHeader; | |
359 | fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd); | |
360 | ||
361 | if (useOriginAndExtent) | |
362 | metaHeader.mtSize += 15; | |
363 | else | |
364 | metaHeader.mtSize += 5; | |
365 | ||
366 | fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle); | |
367 | ||
368 | // Write SetMapMode, SetWindowOrigin and SetWindowExt records | |
369 | char modeBuffer[8]; | |
370 | char originBuffer[10]; | |
371 | char extentBuffer[10]; | |
372 | METARECORD *modeRecord = (METARECORD *)&modeBuffer; | |
373 | ||
374 | METARECORD *originRecord = (METARECORD *)&originBuffer; | |
375 | METARECORD *extentRecord = (METARECORD *)&extentBuffer; | |
376 | ||
377 | modeRecord->rdSize = 4; | |
378 | modeRecord->rdFunction = META_SETMAPMODE; | |
379 | modeRecord->rdParm[0] = MM_ANISOTROPIC; | |
380 | ||
381 | originRecord->rdSize = 5; | |
382 | originRecord->rdFunction = META_SETWINDOWORG; | |
383 | originRecord->rdParm[0] = originY; | |
384 | originRecord->rdParm[1] = originX; | |
385 | ||
386 | extentRecord->rdSize = 5; | |
387 | extentRecord->rdFunction = META_SETWINDOWEXT; | |
388 | extentRecord->rdParm[0] = extentY; | |
389 | extentRecord->rdParm[1] = extentX; | |
390 | ||
391 | fwrite((void *)modeBuffer, sizeof(char), 8, fHandle); | |
392 | ||
393 | if (useOriginAndExtent) | |
394 | { | |
395 | fwrite((void *)originBuffer, sizeof(char), 10, fHandle); | |
396 | fwrite((void *)extentBuffer, sizeof(char), 10, fHandle); | |
397 | } | |
398 | ||
399 | int ch = -2; | |
400 | while (ch != EOF) | |
401 | { | |
402 | ch = getc(fd); | |
403 | if (ch != EOF) | |
404 | { | |
405 | putc(ch, fHandle); | |
406 | } | |
407 | } | |
408 | fclose(fHandle); | |
409 | fclose(fd); | |
410 | wxRemoveFile(filename); | |
411 | wxCopyFile(tempFileBuf, filename); | |
412 | wxRemoveFile(tempFileBuf); | |
413 | */ | |
414 | return TRUE; | |
415 | } | |
416 | ||
417 | #endif // wxUSE_METAFILE | |
418 |