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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