Mercurial > hg > xemacs-beta
annotate lwlib/lwlib-colors.c @ 5481:5008a40f7460
Added tag r21-5-31 for changeset f5a0b32f4687
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Fri, 29 Apr 2011 22:57:14 +0900 |
| parents | 308d34e9f07d |
| children | cb65bfaf7110 |
| rev | line source |
|---|---|
| 3094 | 1 /* Color data structures for X and Xft. |
| 2 | |
| 3 Copyright (C) 2004 Free Software Foundation, Inc. | |
| 4 | |
| 5 Author: Stephen J. Turnbull <stephen@xemacs.org> | |
| 6 Created: 24 Jul 2004 by Stephen J. Turnbull | |
| 7 | |
| 8 This file is part of XEmacs. | |
| 9 | |
|
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10 XEmacs is free software: you can redistribute it and/or modify it |
| 3094 | 11 under the terms of the GNU General Public License as published by the |
|
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changeset
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12 Free Software Foundation, either version 3 of the License, or (at your |
|
308d34e9f07d
Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
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13 option) any later version. |
| 3094 | 14 |
| 15 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 18 for more details. | |
| 19 | |
| 20 You should have received a copy of the GNU General Public License | |
|
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Changed bulk of GPLv2 or later files identified by script
Mats Lidell <matsl@xemacs.org>
parents:
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changeset
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21 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 3094 | 22 |
| 23 /* Synched up with: Not in GNU Emacs. */ | |
| 24 | |
| 25 #include <config.h> | |
| 26 #include <limits.h> /* for ULONG_MAX */ | |
| 27 #include <stdlib.h> /* for malloc() */ | |
| 28 #include <stdio.h> | |
| 29 #include <X11/Xlib.h> | |
| 30 #include <X11/IntrinsicP.h> | |
| 31 #include <X11/ShellP.h> /* for ShellWidget */ | |
| 32 #include "lwlib-colors.h" | |
| 33 | |
| 34 static int debug_colors = 1; | |
| 35 | |
| 36 #ifdef __cplusplus | |
| 37 #define X_CLASSFIELD c_class | |
| 38 #else | |
| 39 #define X_CLASSFIELD class | |
| 40 #endif | |
| 41 | |
| 42 #define MINL(x,y) ((((unsigned long) (x)) < ((unsigned long) (y))) \ | |
| 43 ? ((unsigned long) (x)) : ((unsigned long) (y))) | |
| 44 | |
| 45 /* WIDGET is an Xt widget, VISUAL and DEPTH are return values */ | |
| 46 void | |
| 47 visual_info_from_widget (Widget widget, Visual **visual, int *depth) | |
| 48 { | |
| 49 /* grab the visual and depth from the nearest shell ancestor */ | |
| 50 Widget p = XtParent(widget); | |
| 51 | |
| 52 *visual = CopyFromParent; | |
| 53 *depth = -1; | |
| 54 while (*visual == CopyFromParent && p) | |
| 55 { | |
| 56 if (XtIsShell(p)) | |
| 57 { | |
| 58 *visual = ((ShellWidget)p)->shell.visual; | |
| 59 *depth = p->core.depth; | |
| 60 } | |
| 61 p = XtParent(p); | |
| 62 } | |
| 63 if (*visual == CopyFromParent || !*visual) | |
| 64 { | |
| 65 if (debug_colors > 1) | |
| 66 fprintf (stderr, "\nvisual_info_from_widget:" | |
| 67 " failed, using DefaultVisualOfScreen"); | |
| 68 *visual = DefaultVisualOfScreen (XtScreen (widget)); | |
| 69 *depth = DefaultDepthOfScreen (XtScreen (widget)); | |
| 70 } | |
| 71 else if (debug_colors > 1) | |
| 72 fprintf (stderr, "\nvisual_info_from_widget: succeeded"); | |
| 73 } | |
| 74 | |
| 75 /* Do we need all this hair on modern hardware? */ | |
| 76 | |
| 77 /* Replacement for XAllocColor() that tries to return the nearest | |
| 78 available color if the colormap is full. Original was from FSFmacs, | |
| 79 but rewritten by Jareth Hein <jareth@camelot-soft.com> 97/11/25 | |
| 80 Modified by Lee Kindness <lkindness@csl.co.uk> 31/08/99 to handle previous | |
| 81 total failure which was due to a read/write colorcell being the nearest | |
| 82 match - tries the next nearest... | |
| 83 | |
| 84 Return value is 1 for normal success, 2 for nearest color success, | |
| 85 3 for Non-deallocable success. */ | |
| 86 int | |
| 87 x_allocate_nearest_color (Display *display, Colormap colormap, | |
| 88 Visual *visual, XColor *color_def) | |
| 89 { | |
| 90 int status; | |
| 91 | |
| 92 /* #### [[Apparently this is often called with data derived from a widget | |
| 93 with no ShellWidget ancestor, or before the shell has a visual. | |
| 94 Currently this recovery code is in xlwmenu.c and xlwscrollbar.c, but | |
| 95 likely should come here.]] | |
| 96 I suspect the problem is that the visual-tracing code was improperly | |
| 97 written, missing a level of indirection. | |
| 98 CopyFromParent == NULL in XFree86/Darwin. | |
| 99 */ | |
| 100 if (visual == CopyFromParent || !visual) | |
| 101 { | |
| 102 Screen *screen = DefaultScreenOfDisplay (display); | |
| 103 fprintf (stderr, "\nx_allocate_nearest_color: bad visual (%08lx)", | |
| 104 (unsigned long) visual); | |
| 105 visual = DefaultVisualOfScreen (screen); | |
| 106 } | |
| 107 | |
| 108 if (visual->X_CLASSFIELD == DirectColor || visual->X_CLASSFIELD == TrueColor) | |
| 109 { | |
| 110 if (XAllocColor (display, colormap, color_def) != 0) | |
| 111 { | |
| 112 status = 1; | |
| 113 } | |
| 114 else | |
| 115 { | |
| 116 /* We're dealing with a TrueColor/DirectColor visual, so play games | |
| 117 with the RGB values in the XColor struct. */ | |
| 118 /* #### JH: I'm not sure how a call to XAllocColor can fail in a | |
| 119 TrueColor or DirectColor visual, so I will just reformat the | |
| 120 request to match the requirements of the visual, and re-issue | |
| 121 the request. If this fails for anybody, I wanna know about it | |
| 122 so I can come up with a better plan */ | |
| 123 | |
| 124 unsigned long rshift,gshift,bshift,rbits,gbits,bbits,junk; | |
| 125 junk = visual->red_mask; | |
| 126 rshift = 0; | |
| 127 while ((junk & 0x1) == 0) { | |
| 128 junk = junk >> 1; | |
| 129 rshift ++; | |
| 130 } | |
| 131 rbits = 0; | |
| 132 while (junk != 0) { | |
| 133 junk = junk >> 1; | |
| 134 rbits++; | |
| 135 } | |
| 136 junk = visual->green_mask; | |
| 137 gshift = 0; | |
| 138 while ((junk & 0x1) == 0) { | |
| 139 junk = junk >> 1; | |
| 140 gshift ++; | |
| 141 } | |
| 142 gbits = 0; | |
| 143 while (junk != 0) { | |
| 144 junk = junk >> 1; | |
| 145 gbits++; | |
| 146 } | |
| 147 junk = visual->blue_mask; | |
| 148 bshift = 0; | |
| 149 while ((junk & 0x1) == 0) { | |
| 150 junk = junk >> 1; | |
| 151 bshift ++; | |
| 152 } | |
| 153 bbits = 0; | |
| 154 while (junk != 0) { | |
| 155 junk = junk >> 1; | |
| 156 bbits++; | |
| 157 } | |
| 158 | |
| 159 color_def->red = color_def->red >> (16 - rbits); | |
| 160 color_def->green = color_def->green >> (16 - gbits); | |
| 161 color_def->blue = color_def->blue >> (16 - bbits); | |
| 162 if (XAllocColor (display, colormap, color_def) != 0) | |
| 163 status = 1; | |
| 164 else | |
| 165 { | |
| 166 int rd, gr, bl; | |
| 167 /* #### JH: I'm punting here, knowing that doing this will at | |
| 168 least draw the color correctly. However, unless we convert | |
| 169 all of the functions that allocate colors (graphics | |
| 170 libraries, etc) to use this function doing this is very | |
| 171 likely to cause problems later... */ | |
| 172 | |
| 173 if (rbits > 8) | |
| 174 rd = color_def->red << (rbits - 8); | |
| 175 else | |
| 176 rd = color_def->red >> (8 - rbits); | |
| 177 if (gbits > 8) | |
| 178 gr = color_def->green << (gbits - 8); | |
| 179 else | |
| 180 gr = color_def->green >> (8 - gbits); | |
| 181 if (bbits > 8) | |
| 182 bl = color_def->blue << (bbits - 8); | |
| 183 else | |
| 184 bl = color_def->blue >> (8 - bbits); | |
| 185 color_def->pixel = (rd << rshift) | (gr << gshift) | (bl << | |
| 186 bshift); | |
| 187 status = 3; | |
| 188 } | |
| 189 } | |
| 190 } | |
| 191 else | |
| 192 { | |
| 193 XColor *cells = NULL; | |
| 194 /* JH: I can't believe there's no way to go backwards from a | |
| 195 colormap ID and get its visual and number of entries, but X | |
| 196 apparently isn't built that way... */ | |
| 197 int no_cells = visual->map_entries; | |
| 198 status = 0; | |
| 199 | |
| 200 if (XAllocColor (display, colormap, color_def) != 0) | |
| 201 status = 1; | |
| 202 else while( status != 2 ) | |
| 203 { | |
| 204 /* If we got to this point, the colormap is full, so we're | |
| 205 going to try and get the next closest color. The algorithm used | |
| 206 is a least-squares matching, which is what X uses for closest | |
| 207 color matching with StaticColor visuals. */ | |
| 208 int nearest; | |
| 209 long nearest_delta, trial_delta; | |
| 210 int x; | |
| 211 | |
| 212 if( cells == NULL ) | |
| 213 { | |
| 214 /* #### this could be annoyingly slow | |
| 215 tell me again why lwlib can't use alloca & friends? */ | |
| 216 cells = (XColor *) malloc (sizeof(XColor)*no_cells); | |
| 217 for (x = 0; x < no_cells; x++) | |
| 218 cells[x].pixel = x; | |
| 219 | |
| 220 /* read the current colormap */ | |
| 221 XQueryColors (display, colormap, cells, no_cells); | |
| 222 } | |
| 223 | |
| 224 nearest = 0; | |
| 225 /* I'm assuming CSE so I'm not going to condense this. */ | |
| 226 nearest_delta = ((((color_def->red >> 8) - (cells[0].red >> 8)) | |
| 227 * ((color_def->red >> 8) - (cells[0].red >> 8))) | |
| 228 + | |
| 229 (((color_def->green >> 8) - (cells[0].green >> 8)) | |
| 230 * ((color_def->green >> 8) - (cells[0].green >> | |
| 231 8))) | |
| 232 + | |
| 233 (((color_def->blue >> 8) - (cells[0].blue >> 8)) | |
| 234 * ((color_def->blue >> 8) - (cells[0].blue >> | |
| 235 8)))); | |
| 236 for (x = 1; x < no_cells; x++) | |
| 237 { | |
| 238 trial_delta = ((((color_def->red >> 8) - (cells[x].red >> 8)) | |
| 239 * ((color_def->red >> 8) - (cells[x].red >> 8))) | |
| 240 + | |
| 241 (((color_def->green >> 8) - (cells[x].green >> 8)) | |
| 242 * ((color_def->green >> 8) - (cells[x].green >> | |
| 243 8))) | |
| 244 + | |
| 245 (((color_def->blue >> 8) - (cells[x].blue >> 8)) | |
| 246 * ((color_def->blue >> 8) - (cells[x].blue >> | |
| 247 8)))); | |
| 248 | |
| 249 /* less? Ignore cells marked as previously failing */ | |
| 250 if( (trial_delta < nearest_delta) && | |
| 251 (cells[x].pixel != ULONG_MAX) ) | |
| 252 { | |
| 253 nearest = x; | |
| 254 nearest_delta = trial_delta; | |
| 255 } | |
| 256 } | |
| 257 color_def->red = cells[nearest].red; | |
| 258 color_def->green = cells[nearest].green; | |
| 259 color_def->blue = cells[nearest].blue; | |
| 260 if (XAllocColor (display, colormap, color_def) != 0) | |
| 261 status = 2; | |
| 262 else | |
| 263 /* LSK: Either the colour map has changed since | |
| 264 * we read it, or the colour is allocated | |
| 265 * read/write... Mark this cmap entry so it's | |
| 266 * ignored in the next iteration. | |
| 267 */ | |
| 268 cells[nearest].pixel = ULONG_MAX; | |
| 269 } | |
| 270 } | |
| 271 return status; | |
| 272 } | |
| 273 | |
| 274 #if 0 | |
| 275 /* Replacement for XAllocColor() that tries to return the nearest | |
| 276 available color if the colormap is full. From GNU Emacs. | |
| 277 #### Review this to see if there's anything our hairy version could use. */ | |
| 278 | |
| 279 int | |
| 280 FIXME_allocate_nearest_color (Display *display, Colormap screen_colormap, | |
| 281 XColor *color_def) | |
| 282 { | |
| 283 int status = XAllocColor (display, screen_colormap, color_def); | |
| 284 if (status) | |
| 285 return status; | |
| 286 | |
| 287 { | |
| 288 /* If we got to this point, the colormap is full, so we're | |
| 289 going to try to get the next closest color. | |
| 290 The algorithm used is a least-squares matching, which is | |
| 291 what X uses for closest color matching with StaticColor visuals. */ | |
| 292 | |
| 293 int nearest, x; | |
| 294 unsigned long nearest_delta = ULONG_MAX; | |
| 295 | |
| 296 int no_cells = XDisplayCells (display, XDefaultScreen (display)); | |
| 297 /* Don't use alloca here because lwlib doesn't have the | |
| 298 necessary configuration information that src does. */ | |
| 299 XColor *cells = (XColor *) malloc (sizeof (XColor) * no_cells); | |
| 300 | |
| 301 for (x = 0; x < no_cells; x++) | |
| 302 cells[x].pixel = x; | |
| 303 | |
| 304 XQueryColors (display, screen_colormap, cells, no_cells); | |
| 305 | |
| 306 for (nearest = 0, x = 0; x < no_cells; x++) | |
| 307 { | |
| 308 long dred = (color_def->red >> 8) - (cells[x].red >> 8); | |
| 309 long dgreen = (color_def->green >> 8) - (cells[x].green >> 8); | |
| 310 long dblue = (color_def->blue >> 8) - (cells[x].blue >> 8); | |
| 311 unsigned long delta = dred * dred + dgreen * dgreen + dblue * dblue; | |
| 312 | |
| 313 if (delta < nearest_delta) | |
| 314 { | |
| 315 nearest = x; | |
| 316 nearest_delta = delta; | |
| 317 } | |
| 318 } | |
| 319 color_def->red = cells[nearest].red; | |
| 320 color_def->green = cells[nearest].green; | |
| 321 color_def->blue = cells[nearest].blue; | |
| 322 free (cells); | |
| 323 return XAllocColor (display, screen_colormap, color_def); | |
| 324 } | |
| 325 } | |
| 326 #endif | |
| 327 | |
| 328 | |
|
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329 #ifdef HAVE_XFT |
| 3094 | 330 |
| 331 XftColor | |
| 332 xft_convert_color (Display *dpy, Colormap cmap, Visual *visual, int c, int dim) | |
| 333 { | |
| 334 static XColor color; /* #### why is this static ?? */ | |
| 335 XftColor result; | |
| 336 | |
| 337 color.pixel = c; | |
| 338 XQueryColor(dpy, cmap, &color); | |
| 339 | |
| 340 if (dim) | |
| 341 { | |
| 342 color.red = MINL (65535, color.red * 1.5); | |
| 343 color.green = MINL (65535, color.green * 1.5); | |
| 344 color.blue = MINL (65535, color.blue * 1.5); | |
| 345 x_allocate_nearest_color (dpy, cmap, visual, &color); | |
| 346 } | |
| 347 | |
| 348 result.pixel = color.pixel; | |
| 349 result.color.red = color.red; | |
| 350 result.color.green = color.green; | |
| 351 result.color.blue = color.blue; | |
| 352 result.color.alpha = 0xffff; | |
| 353 | |
| 354 return result; | |
| 355 } | |
| 356 | |
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split USE_XFT into HAVE_XFT/USE_XFT
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
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357 #endif /* HAVE_XFT */ |
| 3094 | 358 |
| 359 /* end of lwlib-colors.c */ |