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Diffstat (limited to 'src/FbTk/XFontImp.cc')
-rw-r--r-- | src/FbTk/XFontImp.cc | 398 |
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diff --git a/src/FbTk/XFontImp.cc b/src/FbTk/XFontImp.cc new file mode 100644 index 0000000..66adee3 --- /dev/null +++ b/src/FbTk/XFontImp.cc | |||
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1 | // XFontImp.cc for FbTk fluxbox toolkit | ||
2 | // Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org) | ||
3 | // | ||
4 | // Permission is hereby granted, free of charge, to any person obtaining a | ||
5 | // copy of this software and associated documentation files (the "Software"), | ||
6 | // to deal in the Software without restriction, including without limitation | ||
7 | // the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
8 | // and/or sell copies of the Software, and to permit persons to whom the | ||
9 | // Software is furnished to do so, subject to the following conditions: | ||
10 | // | ||
11 | // The above copyright notice and this permission notice shall be included in | ||
12 | // all copies or substantial portions of the Software. | ||
13 | // | ||
14 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
15 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
16 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
17 | // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
18 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
19 | // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
20 | // DEALINGS IN THE SOFTWARE. | ||
21 | |||
22 | // $Id: XFontImp.cc,v 1.5 2002/12/09 22:12:56 fluxgen Exp $ | ||
23 | |||
24 | #include "XFontImp.hh" | ||
25 | #include "App.hh" | ||
26 | |||
27 | #include <X11/Xutil.h> | ||
28 | |||
29 | #include <iostream> | ||
30 | #include <new> | ||
31 | #include <cstdio> | ||
32 | using namespace std; | ||
33 | |||
34 | namespace FbTk { | ||
35 | |||
36 | XFontImp::XFontImp(const char *fontname):m_rotfont(0), m_fontstruct(0), | ||
37 | m_angle(0), m_rotate(true) { | ||
38 | if (fontname != 0) | ||
39 | load(fontname); | ||
40 | } | ||
41 | |||
42 | XFontImp::~XFontImp() { | ||
43 | if (m_fontstruct != 0) | ||
44 | XFreeFont(App::instance()->display(), m_fontstruct); | ||
45 | if (m_rotfont != 0) | ||
46 | freeRotFont(); | ||
47 | } | ||
48 | |||
49 | int XFontImp::ascent() const { | ||
50 | if (m_fontstruct == 0) | ||
51 | return 0; | ||
52 | if (m_rotfont != 0) | ||
53 | return m_rotfont->max_ascent; | ||
54 | |||
55 | return m_fontstruct->ascent; | ||
56 | } | ||
57 | |||
58 | bool XFontImp::load(const std::string &fontname) { | ||
59 | XFontStruct *font = XLoadQueryFont(App::instance()->display(), fontname.c_str()); | ||
60 | if (font == 0) | ||
61 | return false; | ||
62 | if (m_fontstruct != 0) // free old font struct, if any | ||
63 | XFreeFont(App::instance()->display(), m_fontstruct); | ||
64 | |||
65 | m_fontstruct = font; //set new font | ||
66 | |||
67 | if (m_rotfont != 0) { | ||
68 | freeRotFont(); // free old rotated font | ||
69 | rotate(m_angle); // allocate new rotated font and rotate it to old angle | ||
70 | } | ||
71 | |||
72 | return true; | ||
73 | } | ||
74 | |||
75 | void XFontImp::drawText(Drawable w, int screen, GC gc, const char *text, size_t len, int x, int y) const { | ||
76 | if (m_fontstruct == 0) | ||
77 | return; | ||
78 | // use roated font functions? | ||
79 | if (m_rotfont != 0 && m_rotate) { | ||
80 | drawRotText(w, screen, gc, text, len, x, y); | ||
81 | return; | ||
82 | } | ||
83 | |||
84 | Display *disp = App::instance()->display(); | ||
85 | XSetFont(disp, gc, m_fontstruct->fid); | ||
86 | XDrawString(disp, w, gc, x, y, text, len); | ||
87 | } | ||
88 | |||
89 | unsigned int XFontImp::textWidth(const char * const text, unsigned int size) const { | ||
90 | if (text == 0) | ||
91 | return 0; | ||
92 | if (m_fontstruct == 0) | ||
93 | return 0; | ||
94 | // check rotated font? | ||
95 | if (m_rotfont != 0) | ||
96 | return rotTextWidth(text, size); | ||
97 | |||
98 | return XTextWidth(m_fontstruct, text, size); | ||
99 | } | ||
100 | |||
101 | unsigned int XFontImp::height() const { | ||
102 | if (m_fontstruct == 0) | ||
103 | return 0; | ||
104 | |||
105 | return m_fontstruct->ascent + m_fontstruct->descent; | ||
106 | } | ||
107 | |||
108 | void XFontImp::rotate(float angle) { | ||
109 | //we must have a font loaded before we rotate | ||
110 | if (m_fontstruct == 0 || m_fontstruct->per_char == 0) | ||
111 | return; | ||
112 | |||
113 | if (m_rotfont != 0) | ||
114 | freeRotFont(); | ||
115 | |||
116 | // no need for rotating, use regular font | ||
117 | if (angle == 0) { | ||
118 | m_angle = 0; | ||
119 | return; | ||
120 | } | ||
121 | |||
122 | //get positive angle | ||
123 | while (angle < 0) | ||
124 | angle += 360; | ||
125 | |||
126 | m_angle = angle; | ||
127 | |||
128 | char val; | ||
129 | XImage *I1, *I2; | ||
130 | // X system default vars | ||
131 | Display *dpy = App::instance()->display(); | ||
132 | Window rootwin = DefaultRootWindow(dpy); | ||
133 | int screen = DefaultScreen(dpy); | ||
134 | |||
135 | GC font_gc; | ||
136 | char text[3]; | ||
137 | int ichar, i, j, index, boxlen = 60; | ||
138 | int vert_w, vert_h, vert_len, bit_w, bit_h, bit_len; | ||
139 | int min_char, max_char; | ||
140 | unsigned char *vertdata, *bitdata; | ||
141 | int ascent, descent, lbearing, rbearing; | ||
142 | |||
143 | // get nearest vertical or horizontal direction | ||
144 | int dir = (int)((angle+45.0)/90.0)%4; | ||
145 | |||
146 | if (dir == 0) // no rotation | ||
147 | return; | ||
148 | |||
149 | // create the depth 1 canvas bitmap | ||
150 | Pixmap canvas = XCreatePixmap(dpy, rootwin, boxlen, boxlen, 1); | ||
151 | |||
152 | // create graphic context for our canvas | ||
153 | font_gc = XCreateGC(dpy, canvas, 0, 0); | ||
154 | |||
155 | XSetBackground(dpy, font_gc, None); | ||
156 | |||
157 | XSetFont(dpy, font_gc, m_fontstruct->fid); | ||
158 | |||
159 | // allocate space for rotated font | ||
160 | m_rotfont = new(nothrow) XRotFontStruct; | ||
161 | |||
162 | if (m_rotfont == 0) { | ||
163 | cerr<<"RotFont: out of memory"<<endl; | ||
164 | return; | ||
165 | } | ||
166 | |||
167 | // determine which characters are defined in font | ||
168 | min_char = m_fontstruct->min_char_or_byte2; | ||
169 | max_char = m_fontstruct->max_char_or_byte2; | ||
170 | |||
171 | // we only want printable chars | ||
172 | if (min_char<32) | ||
173 | min_char = 32; | ||
174 | if (max_char>126) | ||
175 | max_char = 126; | ||
176 | |||
177 | /* some overall font data ... */ | ||
178 | m_rotfont->dir = dir; | ||
179 | m_rotfont->min_char = min_char; | ||
180 | m_rotfont->max_char = max_char; | ||
181 | m_rotfont->max_ascent = m_fontstruct->max_bounds.ascent; | ||
182 | m_rotfont->max_descent = m_fontstruct->max_bounds.descent; | ||
183 | m_rotfont->height = m_rotfont->max_ascent + m_rotfont->max_descent; | ||
184 | |||
185 | // font needs rotation | ||
186 | // loop through each character | ||
187 | for (ichar = min_char; ichar <= max_char; ichar++) { | ||
188 | index = ichar - m_fontstruct->min_char_or_byte2; | ||
189 | |||
190 | // per char dimensions ... | ||
191 | ascent = m_rotfont->per_char[ichar-32].ascent = m_fontstruct->per_char[index].ascent; | ||
192 | descent = m_rotfont->per_char[ichar-32].descent = m_fontstruct->per_char[index].descent; | ||
193 | lbearing = m_rotfont->per_char[ichar-32].lbearing = m_fontstruct->per_char[index].lbearing; | ||
194 | rbearing = m_rotfont->per_char[ichar-32].rbearing = m_fontstruct->per_char[index].rbearing; | ||
195 | m_rotfont->per_char[ichar-32].width = m_fontstruct->per_char[index].width; | ||
196 | |||
197 | // some space chars have zero body, but a bitmap can't have | ||
198 | if (!ascent && !descent) | ||
199 | ascent = m_rotfont->per_char[ichar-32].ascent = 1; | ||
200 | if (!lbearing && !rbearing) | ||
201 | rbearing = m_rotfont->per_char[ichar-32].rbearing = 1; | ||
202 | |||
203 | // glyph width and height when vertical | ||
204 | vert_w = rbearing - lbearing; | ||
205 | vert_h = ascent + descent; | ||
206 | |||
207 | // width in bytes | ||
208 | vert_len = (vert_w-1)/8+1; | ||
209 | |||
210 | XSetForeground(dpy, font_gc, None); | ||
211 | XFillRectangle(dpy, canvas, font_gc, 0, 0, boxlen, boxlen); | ||
212 | |||
213 | // draw the character centre top right on canvas | ||
214 | sprintf(text, "%c", ichar); | ||
215 | XSetForeground(dpy, font_gc, 1); | ||
216 | XDrawImageString(dpy, canvas, font_gc, boxlen/2 - lbearing, | ||
217 | boxlen/2 - descent, text, 1); | ||
218 | |||
219 | // reserve memory for first XImage | ||
220 | vertdata = (unsigned char *) malloc((unsigned)(vert_len*vert_h)); | ||
221 | |||
222 | /* create the XImage ... */ | ||
223 | I1 = XCreateImage(dpy, DefaultVisual(dpy, screen), 1, XYBitmap, | ||
224 | 0, (char *)vertdata, vert_w, vert_h, 8, 0); | ||
225 | |||
226 | if (I1 == None) { | ||
227 | cerr<<"RotFont: Cant create ximage."<<endl; | ||
228 | delete m_rotfont; | ||
229 | m_rotfont = 0; | ||
230 | return; | ||
231 | } | ||
232 | |||
233 | I1->byte_order = I1->bitmap_bit_order = MSBFirst; | ||
234 | |||
235 | /* extract character from canvas ... */ | ||
236 | XGetSubImage(dpy, canvas, boxlen/2, boxlen/2 - vert_h, | ||
237 | vert_w, vert_h, 1, XYPixmap, I1, 0, 0); | ||
238 | I1->format = XYBitmap; | ||
239 | |||
240 | /* width, height of rotated character ... */ | ||
241 | if (dir == 2) { | ||
242 | bit_w = vert_w; | ||
243 | bit_h = vert_h; | ||
244 | } else { | ||
245 | bit_w = vert_h; | ||
246 | bit_h = vert_w; | ||
247 | } | ||
248 | |||
249 | /* width in bytes ... */ | ||
250 | bit_len = (bit_w-1)/8 + 1; | ||
251 | |||
252 | m_rotfont->per_char[ichar-32].glyph.bit_w = bit_w; | ||
253 | m_rotfont->per_char[ichar-32].glyph.bit_h = bit_h; | ||
254 | |||
255 | /* reserve memory for the rotated image ... */ | ||
256 | bitdata = (unsigned char *)calloc((unsigned)(bit_h * bit_len), 1); | ||
257 | |||
258 | /* create the image ... */ | ||
259 | I2 = XCreateImage(dpy, DefaultVisual(dpy, screen), 1, XYBitmap, 0, | ||
260 | (char *)bitdata, bit_w, bit_h, 8, 0); | ||
261 | |||
262 | if (I2 == None) { | ||
263 | cerr<<"XFontImp: Cant create ximage!"<<endl; | ||
264 | delete m_rotfont; | ||
265 | m_rotfont = 0; | ||
266 | return; | ||
267 | } | ||
268 | |||
269 | I2->byte_order = I2->bitmap_bit_order = MSBFirst; | ||
270 | |||
271 | /* map vertical data to rotated character ... */ | ||
272 | for (j = 0; j < bit_h; j++) { | ||
273 | for (i = 0; i < bit_w; i++) { | ||
274 | /* map bits ... */ | ||
275 | if (dir == 1) { | ||
276 | val = vertdata[i*vert_len + (vert_w-j-1)/8] & | ||
277 | (128>>((vert_w-j-1)%8)); | ||
278 | } else if (dir == 2) { | ||
279 | val = vertdata[(vert_h-j-1)*vert_len + | ||
280 | (vert_w-i-1)/8] & (128>>((vert_w-i-1)%8)); | ||
281 | } else { | ||
282 | val = vertdata[(vert_h-i-1)*vert_len + j/8] & | ||
283 | (128>>(j%8)); | ||
284 | } | ||
285 | if (val) { | ||
286 | bitdata[j*bit_len + i/8] = bitdata[j*bit_len + i/8] | | ||
287 | (128>>(i%8)); | ||
288 | } | ||
289 | } | ||
290 | } | ||
291 | |||
292 | // create this character's bitmap | ||
293 | m_rotfont->per_char[ichar-32].glyph.bm = | ||
294 | XCreatePixmap(dpy, rootwin, bit_w, bit_h, 1); | ||
295 | |||
296 | // put the image into the bitmap | ||
297 | XPutImage(dpy, m_rotfont->per_char[ichar-32].glyph.bm, | ||
298 | font_gc, I2, 0, 0, 0, 0, bit_w, bit_h); | ||
299 | |||
300 | // free the image and data | ||
301 | XDestroyImage(I1); | ||
302 | XDestroyImage(I2); | ||
303 | } | ||
304 | |||
305 | /* free pixmap and GC ... */ | ||
306 | XFreePixmap(dpy, canvas); | ||
307 | XFreeGC(dpy, font_gc); | ||
308 | |||
309 | } | ||
310 | |||
311 | void XFontImp::freeRotFont() { | ||
312 | if (m_rotfont == 0) | ||
313 | return; | ||
314 | // loop through each character and free its pixmap | ||
315 | for (int ichar = m_rotfont->min_char - 32; | ||
316 | ichar <= m_rotfont->max_char - 32; ++ichar) { | ||
317 | XFreePixmap(App::instance()->display(), m_rotfont->per_char[ichar].glyph.bm); | ||
318 | } | ||
319 | |||
320 | delete m_rotfont; | ||
321 | m_rotfont = 0; | ||
322 | } | ||
323 | |||
324 | void XFontImp::drawRotText(Drawable w, int screen, GC gc, const char *text, size_t len, int x, int y) const { | ||
325 | |||
326 | Display *dpy = App::instance()->display(); | ||
327 | static GC my_gc = 0; | ||
328 | int xp, yp, dir, ichar; | ||
329 | |||
330 | if (text == NULL || len<1) | ||
331 | return; | ||
332 | |||
333 | dir = m_rotfont->dir; | ||
334 | if (my_gc == 0) | ||
335 | my_gc = XCreateGC(dpy, w, 0, 0); | ||
336 | |||
337 | XCopyGC(dpy, gc, GCForeground|GCBackground, my_gc); | ||
338 | |||
339 | // vertical or upside down | ||
340 | |||
341 | XSetFillStyle(dpy, my_gc, FillStippled); | ||
342 | |||
343 | // loop through each character in texting | ||
344 | for (size_t i = 0; i<len; i++) { | ||
345 | ichar = text[i]-32; | ||
346 | |||
347 | // make sure it's a printing character | ||
348 | if (ichar >= 0 && ichar<95) { | ||
349 | // suitable offset | ||
350 | if (dir == 1) { | ||
351 | xp = x-m_rotfont->per_char[ichar].ascent; | ||
352 | yp = y-m_rotfont->per_char[ichar].rbearing; | ||
353 | } else if (dir == 2) { | ||
354 | xp = x-m_rotfont->per_char[ichar].rbearing; | ||
355 | yp = y-m_rotfont->per_char[ichar].descent+1; | ||
356 | } else { | ||
357 | xp = x-m_rotfont->per_char[ichar].descent+1; | ||
358 | yp = y+m_rotfont->per_char[ichar].lbearing; | ||
359 | } | ||
360 | |||
361 | // draw the glyph | ||
362 | XSetStipple(dpy, my_gc, m_rotfont->per_char[ichar].glyph.bm); | ||
363 | |||
364 | XSetTSOrigin(dpy, my_gc, xp, yp); | ||
365 | |||
366 | XFillRectangle(dpy, w, my_gc, xp, yp, | ||
367 | m_rotfont->per_char[ichar].glyph.bit_w, | ||
368 | m_rotfont->per_char[ichar].glyph.bit_h); | ||
369 | |||
370 | // advance position | ||
371 | if (dir == 1) | ||
372 | y -= m_rotfont->per_char[ichar].width; | ||
373 | else if (dir == 2) | ||
374 | x -= m_rotfont->per_char[ichar].width; | ||
375 | else | ||
376 | y += m_rotfont->per_char[ichar].width; | ||
377 | } | ||
378 | } | ||
379 | } | ||
380 | |||
381 | |||
382 | unsigned int XFontImp::rotTextWidth(const char * const text, unsigned int size) const { | ||
383 | |||
384 | if (text == 0) | ||
385 | return 0; | ||
386 | |||
387 | unsigned int width = 0; | ||
388 | for (size_t i = 0; i<size; i++) { | ||
389 | int ichar = text[i] - 32; | ||
390 | // make sure it's a printing character | ||
391 | if (ichar >= 0 && ichar < 95) | ||
392 | width += m_rotfont->per_char[ichar].width; | ||
393 | } | ||
394 | |||
395 | return width; | ||
396 | } | ||
397 | |||
398 | }; | ||