| File: | cursor.c |
| Location: | line 445, column 9 |
| Description: | Assigned value is garbage or undefined |
| 1 | /* | |||
| 2 | * Copyright © 2002 Keith Packard | |||
| 3 | * | |||
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its | |||
| 5 | * documentation for any purpose is hereby granted without fee, provided that | |||
| 6 | * the above copyright notice appear in all copies and that both that | |||
| 7 | * copyright notice and this permission notice appear in supporting | |||
| 8 | * documentation, and that the name of Keith Packard not be used in | |||
| 9 | * advertising or publicity pertaining to distribution of the software without | |||
| 10 | * specific, written prior permission. Keith Packard makes no | |||
| 11 | * representations about the suitability of this software for any purpose. It | |||
| 12 | * is provided "as is" without express or implied warranty. | |||
| 13 | * | |||
| 14 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |||
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |||
| 16 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |||
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |||
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |||
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |||
| 20 | * PERFORMANCE OF THIS SOFTWARE. | |||
| 21 | */ | |||
| 22 | ||||
| 23 | #include "xcursorint.h" | |||
| 24 | #include <X11/Xlibint.h> | |||
| 25 | #include <X11/Xutil.h> | |||
| 26 | ||||
| 27 | XcursorCursors * | |||
| 28 | XcursorCursorsCreate (Display *dpy, int size) | |||
| 29 | { | |||
| 30 | XcursorCursors *cursors; | |||
| 31 | ||||
| 32 | cursors = malloc (sizeof (XcursorCursors) + | |||
| 33 | size * sizeof (Cursor)); | |||
| 34 | if (!cursors) | |||
| 35 | return NULL((void*)0); | |||
| 36 | cursors->ref = 1; | |||
| 37 | cursors->dpy = dpy; | |||
| 38 | cursors->ncursor = 0; | |||
| 39 | cursors->cursors = (Cursor *) (cursors + 1); | |||
| 40 | return cursors; | |||
| 41 | } | |||
| 42 | ||||
| 43 | void | |||
| 44 | XcursorCursorsDestroy (XcursorCursors *cursors) | |||
| 45 | { | |||
| 46 | int n; | |||
| 47 | ||||
| 48 | if (!cursors) | |||
| 49 | return; | |||
| 50 | ||||
| 51 | --cursors->ref; | |||
| 52 | if (cursors->ref > 0) | |||
| 53 | return; | |||
| 54 | ||||
| 55 | for (n = 0; n < cursors->ncursor; n++) | |||
| 56 | XFreeCursor (cursors->dpy, cursors->cursors[n]); | |||
| 57 | free (cursors); | |||
| 58 | } | |||
| 59 | ||||
| 60 | XcursorAnimate * | |||
| 61 | XcursorAnimateCreate (XcursorCursors *cursors) | |||
| 62 | { | |||
| 63 | XcursorAnimate *animate; | |||
| 64 | ||||
| 65 | animate = malloc (sizeof (XcursorAnimate)); | |||
| 66 | if (!animate) | |||
| 67 | return NULL((void*)0); | |||
| 68 | animate->cursors = cursors; | |||
| 69 | cursors->ref++; | |||
| 70 | animate->sequence = 0; | |||
| 71 | return animate; | |||
| 72 | } | |||
| 73 | ||||
| 74 | void | |||
| 75 | XcursorAnimateDestroy (XcursorAnimate *animate) | |||
| 76 | { | |||
| 77 | if (!animate) | |||
| 78 | return; | |||
| 79 | ||||
| 80 | XcursorCursorsDestroy (animate->cursors); | |||
| 81 | free (animate); | |||
| 82 | } | |||
| 83 | ||||
| 84 | Cursor | |||
| 85 | XcursorAnimateNext (XcursorAnimate *animate) | |||
| 86 | { | |||
| 87 | Cursor cursor = animate->cursors->cursors[animate->sequence++]; | |||
| 88 | ||||
| 89 | if (animate->sequence >= animate->cursors->ncursor) | |||
| 90 | animate->sequence = 0; | |||
| 91 | return cursor; | |||
| 92 | } | |||
| 93 | ||||
| 94 | static int | |||
| 95 | nativeByteOrder (void) | |||
| 96 | { | |||
| 97 | int x = 1; | |||
| 98 | ||||
| 99 | return (*((char *) &x) == 1) ? LSBFirst0 : MSBFirst1; | |||
| 100 | } | |||
| 101 | ||||
| 102 | static XcursorUInt | |||
| 103 | _XcursorPixelBrightness (XcursorPixel p) | |||
| 104 | { | |||
| 105 | XcursorPixel alpha = p >> 24; | |||
| 106 | XcursorPixel r, g, b; | |||
| 107 | ||||
| 108 | if (!alpha) | |||
| 109 | return 0; | |||
| 110 | r = ((p >> 8) & 0xff00) / alpha; | |||
| 111 | if (r > 0xff) r = 0xff; | |||
| 112 | g = ((p >> 0) & 0xff00) / alpha; | |||
| 113 | if (g > 0xff) g = 0xff; | |||
| 114 | b = ((p << 8) & 0xff00) / alpha; | |||
| 115 | if (b > 0xff) b = 0xff; | |||
| 116 | return (r * 153 + g * 301 + b * 58) >> 9; | |||
| 117 | } | |||
| 118 | ||||
| 119 | static unsigned short | |||
| 120 | _XcursorDivideAlpha (XcursorUInt value, XcursorUInt alpha) | |||
| 121 | { | |||
| 122 | if (!alpha) | |||
| 123 | return 0; | |||
| 124 | value = value * 255 / alpha; | |||
| 125 | if (value > 255) | |||
| 126 | value = 255; | |||
| 127 | return value | (value << 8); | |||
| 128 | } | |||
| 129 | ||||
| 130 | static void | |||
| 131 | _XcursorPixelToColor (XcursorPixel p, XColor *color) | |||
| 132 | { | |||
| 133 | XcursorPixel alpha = p >> 24; | |||
| 134 | ||||
| 135 | color->pixel = 0; | |||
| 136 | color->red = _XcursorDivideAlpha ((p >> 16) & 0xff, alpha); | |||
| 137 | color->green = _XcursorDivideAlpha ((p >> 8) & 0xff, alpha); | |||
| 138 | color->blue = _XcursorDivideAlpha ((p >> 0) & 0xff, alpha); | |||
| 139 | color->flags = DoRed(1<<0)|DoGreen(1<<1)|DoBlue(1<<2); | |||
| 140 | } | |||
| 141 | ||||
| 142 | #undef DEBUG_IMAGE | |||
| 143 | #ifdef DEBUG_IMAGE | |||
| 144 | static void | |||
| 145 | _XcursorDumpImage (XImage *image) | |||
| 146 | { | |||
| 147 | FILE *f = fopen ("/tmp/images", "a"); | |||
| 148 | int x, y; | |||
| 149 | if (!f) | |||
| 150 | return; | |||
| 151 | fprintf (f, "%d x %x\n", image->width, image->height); | |||
| 152 | for (y = 0; y < image->height; y++) | |||
| 153 | { | |||
| 154 | for (x = 0; x < image->width; x++) | |||
| 155 | fprintf (f, "%c", XGetPixel (image, x, y)((*((image)->f.get_pixel))((image), (x), (y))) ? '*' : ' '); | |||
| 156 | fprintf (f, "\n"); | |||
| 157 | } | |||
| 158 | fflush (f); | |||
| 159 | fclose (f); | |||
| 160 | } | |||
| 161 | ||||
| 162 | static void | |||
| 163 | _XcursorDumpColor (XColor *color, char *name) | |||
| 164 | { | |||
| 165 | FILE *f = fopen ("/tmp/images", "a"); | |||
| 166 | fprintf (f, "%s: %x %x %x\n", name, | |||
| 167 | color->red, color->green, color->blue); | |||
| 168 | fflush (f); | |||
| 169 | fclose (f); | |||
| 170 | } | |||
| 171 | #endif | |||
| 172 | ||||
| 173 | static int | |||
| 174 | _XcursorCompareRed (const void *a, const void *b) | |||
| 175 | { | |||
| 176 | const XcursorPixel *ap = a, *bp = b; | |||
| 177 | ||||
| 178 | return (int) (((*ap >> 16) & 0xff) - ((*bp >> 16) & 0xff)); | |||
| 179 | } | |||
| 180 | ||||
| 181 | static int | |||
| 182 | _XcursorCompareGreen (const void *a, const void *b) | |||
| 183 | { | |||
| 184 | const XcursorPixel *ap = a, *bp = b; | |||
| 185 | ||||
| 186 | return (int) (((*ap >> 8) & 0xff) - ((*bp >> 8) & 0xff)); | |||
| 187 | } | |||
| 188 | ||||
| 189 | static int | |||
| 190 | _XcursorCompareBlue (const void *a, const void *b) | |||
| 191 | { | |||
| 192 | const XcursorPixel *ap = a, *bp = b; | |||
| 193 | ||||
| 194 | return (int) (((*ap >> 0) & 0xff) - ((*bp >> 0) & 0xff)); | |||
| 195 | } | |||
| 196 | ||||
| 197 | static XcursorPixel | |||
| 198 | _XcursorAverageColor (XcursorPixel *pixels, int npixels) | |||
| 199 | { | |||
| 200 | XcursorPixel p; | |||
| 201 | XcursorPixel red, green, blue; | |||
| 202 | int n = npixels; | |||
| 203 | ||||
| 204 | if (n < 1) | |||
| 205 | return 0; | |||
| 206 | ||||
| 207 | blue = green = red = 0; | |||
| 208 | while (n--) | |||
| 209 | { | |||
| 210 | p = *pixels++; | |||
| 211 | red += (p >> 16) & 0xff; | |||
| 212 | green += (p >> 8) & 0xff; | |||
| 213 | blue += (p >> 0) & 0xff; | |||
| 214 | } | |||
| 215 | return (0xffU << 24) | ((red/npixels) << 16) | ((green/npixels) << 8) | (blue/npixels); | |||
| 216 | } | |||
| 217 | ||||
| 218 | typedef struct XcursorCoreCursor { | |||
| 219 | XImage *src_image; | |||
| 220 | XImage *msk_image; | |||
| 221 | XColor on_color; | |||
| 222 | XColor off_color; | |||
| 223 | } XcursorCoreCursor; | |||
| 224 | ||||
| 225 | static Boolint | |||
| 226 | _XcursorHeckbertMedianCut (const XcursorImage *image, XcursorCoreCursor *core) | |||
| 227 | { | |||
| 228 | XImage *src_image = core->src_image, *msk_image = core->msk_image; | |||
| 229 | unsigned int npixels = image->width * image->height; | |||
| 230 | int ncolors; | |||
| 231 | int n; | |||
| 232 | XcursorPixel *po, *pn, *pc; | |||
| 233 | XcursorPixel p; | |||
| 234 | XcursorPixel red, green, blue, alpha; | |||
| 235 | XcursorPixel max_red, min_red, max_green, min_green, max_blue, min_blue; | |||
| 236 | XcursorPixel *temp, *pixels, *colors; | |||
| 237 | int split; | |||
| 238 | XcursorPixel leftColor, centerColor, rightColor; | |||
| 239 | int (*compare) (const void *, const void *); | |||
| 240 | int x, y; | |||
| 241 | ||||
| 242 | /* | |||
| 243 | * Temp space for converted image and converted colors | |||
| 244 | */ | |||
| 245 | temp = malloc (npixels * sizeof (XcursorPixel) * 2); | |||
| 246 | if (!temp) | |||
| 247 | return False0; | |||
| 248 | ||||
| 249 | pixels = temp; | |||
| 250 | colors = pixels + npixels; | |||
| 251 | ||||
| 252 | /* | |||
| 253 | * Convert to 2-value alpha and build | |||
| 254 | * array of opaque color values and an | |||
| 255 | */ | |||
| 256 | po = image->pixels; | |||
| 257 | pn = pixels; | |||
| 258 | pc = colors; | |||
| 259 | max_blue = max_green = max_red = 0; | |||
| 260 | min_blue = min_green = min_red = 255; | |||
| 261 | n = npixels; | |||
| 262 | while (n--) | |||
| 263 | { | |||
| 264 | p = *po++; | |||
| 265 | alpha = (p >> 24) & 0xff; | |||
| 266 | red = (p >> 16) & 0xff; | |||
| 267 | green = (p >> 8) & 0xff; | |||
| 268 | blue = (p >> 0) & 0xff; | |||
| 269 | if (alpha >= 0x80) | |||
| 270 | { | |||
| 271 | red = red * 255 / alpha; | |||
| 272 | green = green * 255 / alpha; | |||
| 273 | blue = blue * 255 / alpha; | |||
| 274 | if (red < min_red) min_red = red; | |||
| 275 | if (red > max_red) max_red = red; | |||
| 276 | if (green < min_green) min_green = green; | |||
| 277 | if (green > max_green) max_green = green; | |||
| 278 | if (blue < min_blue) min_blue = blue; | |||
| 279 | if (blue > max_blue) max_blue = blue; | |||
| 280 | p = ((0xffU << 24) | (red << 16) | | |||
| 281 | (green << 8) | (blue << 0)); | |||
| 282 | *pc++ = p; | |||
| 283 | } | |||
| 284 | else | |||
| 285 | p = 0; | |||
| 286 | *pn++ = p; | |||
| 287 | } | |||
| 288 | ncolors = pc - colors; | |||
| 289 | ||||
| 290 | /* | |||
| 291 | * Compute longest dimension and sort | |||
| 292 | */ | |||
| 293 | if ((max_green - min_green) >= (max_red - min_red) && | |||
| 294 | (max_green - min_green) >= (max_blue - min_blue)) | |||
| 295 | compare = _XcursorCompareGreen; | |||
| 296 | else if ((max_red - min_red) >= (max_blue - min_blue)) | |||
| 297 | compare = _XcursorCompareRed; | |||
| 298 | else | |||
| 299 | compare = _XcursorCompareBlue; | |||
| 300 | qsort (colors, ncolors, sizeof (XcursorPixel), compare); | |||
| 301 | /* | |||
| 302 | * Compute average colors on both sides of the cut | |||
| 303 | */ | |||
| 304 | split = ncolors >> 1; | |||
| 305 | leftColor = _XcursorAverageColor (colors, split); | |||
| 306 | centerColor = colors[split]; | |||
| 307 | rightColor = _XcursorAverageColor (colors + split, ncolors - split); | |||
| 308 | /* | |||
| 309 | * Select best color for each pixel | |||
| 310 | */ | |||
| 311 | pn = pixels; | |||
| 312 | for (y = 0; y < image->height; y++) | |||
| 313 | for (x = 0; x < image->width; x++) | |||
| 314 | { | |||
| 315 | p = *pn++; | |||
| 316 | if (p & 0xff000000) | |||
| 317 | { | |||
| 318 | XPutPixel (msk_image, x, y, 1)((*((msk_image)->f.put_pixel))((msk_image), (x), (y), (1)) ); | |||
| 319 | if ((*compare) (&p, ¢erColor) >= 0) | |||
| 320 | XPutPixel (src_image, x, y, 0)((*((src_image)->f.put_pixel))((src_image), (x), (y), (0)) ); | |||
| 321 | else | |||
| 322 | XPutPixel (src_image, x, y, 1)((*((src_image)->f.put_pixel))((src_image), (x), (y), (1)) ); | |||
| 323 | } | |||
| 324 | else | |||
| 325 | { | |||
| 326 | XPutPixel (msk_image, x, y, 0)((*((msk_image)->f.put_pixel))((msk_image), (x), (y), (0)) ); | |||
| 327 | XPutPixel (src_image, x, y, 0)((*((src_image)->f.put_pixel))((src_image), (x), (y), (0)) ); | |||
| 328 | } | |||
| 329 | } | |||
| 330 | free (temp); | |||
| 331 | _XcursorPixelToColor (rightColor, &core->off_color); | |||
| 332 | _XcursorPixelToColor (leftColor, &core->on_color); | |||
| 333 | return True1; | |||
| 334 | } | |||
| 335 | ||||
| 336 | #if 0 | |||
| 337 | #define DITHER_DIM2 4 | |||
| 338 | static XcursorPixel orderedDither[4][4] = { | |||
| 339 | { 1, 9, 3, 11 }, | |||
| 340 | { 13, 5, 15, 7 }, | |||
| 341 | { 4, 12, 2, 10 }, | |||
| 342 | { 16, 8, 14, 6 } | |||
| 343 | }; | |||
| 344 | #else | |||
| 345 | #define DITHER_DIM2 2 | |||
| 346 | static XcursorPixel orderedDither[2][2] = { | |||
| 347 | { 1, 3, }, | |||
| 348 | { 4, 2, }, | |||
| 349 | }; | |||
| 350 | #endif | |||
| 351 | ||||
| 352 | #define DITHER_SIZE((sizeof orderedDither / sizeof orderedDither[0][0]) + 1) ((sizeof orderedDither / sizeof orderedDither[0][0]) + 1) | |||
| 353 | ||||
| 354 | static Boolint | |||
| 355 | _XcursorBayerOrderedDither (const XcursorImage *image, XcursorCoreCursor *core) | |||
| 356 | { | |||
| 357 | int x, y; | |||
| 358 | XcursorPixel *pixel, p; | |||
| 359 | XcursorPixel a, i, d; | |||
| 360 | ||||
| 361 | pixel = image->pixels; | |||
| 362 | for (y = 0; y < image->height; y++) | |||
| 363 | for (x = 0; x < image->width; x++) | |||
| 364 | { | |||
| 365 | p = *pixel++; | |||
| 366 | a = ((p >> 24) * DITHER_SIZE((sizeof orderedDither / sizeof orderedDither[0][0]) + 1) + 127) / 255; | |||
| 367 | i = (_XcursorPixelBrightness (p) * DITHER_SIZE((sizeof orderedDither / sizeof orderedDither[0][0]) + 1) + 127) / 255; | |||
| 368 | d = orderedDither[y&(DITHER_DIM2-1)][x&(DITHER_DIM2-1)]; | |||
| 369 | if (a > d) | |||
| 370 | { | |||
| 371 | XPutPixel (core->msk_image, x, y, 1)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (1))); | |||
| 372 | if (i > d) | |||
| 373 | XPutPixel (core->src_image, x, y, 0)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (0))); /* white */ | |||
| 374 | else | |||
| 375 | XPutPixel (core->src_image, x, y, 1)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (1))); /* black */ | |||
| 376 | } | |||
| 377 | else | |||
| 378 | { | |||
| 379 | XPutPixel (core->msk_image, x, y, 0)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (0))); | |||
| 380 | XPutPixel (core->src_image, x, y, 0)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (0))); | |||
| 381 | } | |||
| 382 | } | |||
| 383 | core->on_color.red = 0; | |||
| 384 | core->on_color.green = 0; | |||
| 385 | core->on_color.blue = 0; | |||
| 386 | core->off_color.red = 0xffff; | |||
| 387 | core->off_color.green = 0xffff; | |||
| 388 | core->off_color.blue = 0xffff; | |||
| 389 | return True1; | |||
| 390 | } | |||
| 391 | ||||
| 392 | static Boolint | |||
| 393 | _XcursorFloydSteinberg (const XcursorImage *image, XcursorCoreCursor *core) | |||
| 394 | { | |||
| 395 | int *aPicture, *iPicture, *aP, *iP; | |||
| 396 | XcursorPixel *pixel, p; | |||
| 397 | int aR, iR, aA, iA; | |||
| 398 | unsigned int npixels = image->width * image->height; | |||
| 399 | int n; | |||
| 400 | int right = 1; | |||
| 401 | int belowLeft = image->width - 1; | |||
| 402 | int below = image->width; | |||
| 403 | int belowRight = image->width + 1; | |||
| 404 | int iError, aError; | |||
| 405 | int iErrorRight, aErrorRight; | |||
| 406 | int iErrorBelowLeft, aErrorBelowLeft; | |||
| 407 | int iErrorBelow, aErrorBelow; | |||
| 408 | int iErrorBelowRight, aErrorBelowRight; | |||
| 409 | int x, y; | |||
| 410 | int max_inten, min_inten, mean_inten; | |||
| 411 | ||||
| 412 | iPicture = malloc (npixels * sizeof (int) * 2); | |||
| 413 | if (!iPicture) | |||
| 414 | return False0; | |||
| 415 | aPicture = iPicture + npixels; | |||
| 416 | ||||
| 417 | /* | |||
| 418 | * Compute raw gray and alpha arrays | |||
| 419 | */ | |||
| 420 | pixel = image->pixels; | |||
| 421 | iP = iPicture; | |||
| 422 | aP = aPicture; | |||
| 423 | n = npixels; | |||
| 424 | max_inten = 0; | |||
| 425 | min_inten = 0xff; | |||
| 426 | while (n--) | |||
| 427 | { | |||
| 428 | p = *pixel++; | |||
| 429 | *aP++ = (int) (p >> 24); | |||
| 430 | iR = (int) _XcursorPixelBrightness (p); | |||
| 431 | if (iR > max_inten) max_inten = iR; | |||
| 432 | if (iR < min_inten) min_inten = iR; | |||
| 433 | *iP++ = iR; | |||
| 434 | } | |||
| 435 | /* | |||
| 436 | * Draw the image while diffusing the error | |||
| 437 | */ | |||
| 438 | iP = iPicture; | |||
| 439 | aP = aPicture; | |||
| 440 | mean_inten = (max_inten + min_inten + 1) >> 1; | |||
| 441 | for (y = 0; y < image->height; y++) | |||
| 442 | for (x = 0; x < image->width; x++) | |||
| 443 | { | |||
| 444 | aR = *aP; | |||
| 445 | iR = *iP; | |||
| ||||
| 446 | if (aR >= 0x80) | |||
| 447 | { | |||
| 448 | XPutPixel (core->msk_image, x, y, 1)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (1))); | |||
| 449 | aA = 0xff; | |||
| 450 | } | |||
| 451 | else | |||
| 452 | { | |||
| 453 | XPutPixel (core->msk_image, x, y, 0)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (0))); | |||
| 454 | aA = 0x00; | |||
| 455 | } | |||
| 456 | if (iR >= mean_inten) | |||
| 457 | { | |||
| 458 | XPutPixel (core->src_image, x, y, 0)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (0))); | |||
| 459 | iA = max_inten; | |||
| 460 | } | |||
| 461 | else | |||
| 462 | { | |||
| 463 | XPutPixel (core->src_image, x, y, 1)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (1))); | |||
| 464 | iA = min_inten; | |||
| 465 | } | |||
| 466 | iError = iR - iA; | |||
| 467 | aError = aR - aA; | |||
| 468 | iErrorRight = (iError * 7) >> 4; | |||
| 469 | iErrorBelowLeft = (iError * 3) >> 4; | |||
| 470 | iErrorBelow = (iError * 5) >> 4; | |||
| 471 | iErrorBelowRight = (iError - iErrorRight - | |||
| 472 | iErrorBelowLeft - iErrorBelow); | |||
| 473 | aErrorRight = (aError * 7) >> 4; | |||
| 474 | aErrorBelowLeft = (aError * 3) >> 4; | |||
| 475 | aErrorBelow = (aError * 5) >> 4; | |||
| 476 | aErrorBelowRight = (aError - aErrorRight - | |||
| 477 | aErrorBelowLeft - aErrorBelow); | |||
| 478 | if (x < image->width - 1) | |||
| 479 | { | |||
| 480 | iP[right] += iErrorRight; | |||
| 481 | aP[right] += aErrorRight; | |||
| 482 | } | |||
| 483 | if (y < image->height - 1) | |||
| 484 | { | |||
| 485 | if (x) | |||
| 486 | { | |||
| 487 | iP[belowLeft] += iErrorBelowLeft; | |||
| 488 | aP[belowLeft] += aErrorBelowLeft; | |||
| 489 | } | |||
| 490 | iP[below] += iErrorBelow; | |||
| 491 | aP[below] += aErrorBelow; | |||
| 492 | if (x < image->width - 1) | |||
| 493 | { | |||
| 494 | iP[belowRight] += iErrorBelowRight; | |||
| 495 | aP[belowRight] += aErrorBelowRight; | |||
| 496 | } | |||
| 497 | } | |||
| 498 | aP++; | |||
| 499 | iP++; | |||
| 500 | } | |||
| 501 | free (iPicture); | |||
| 502 | core->on_color.red = | |||
| 503 | core->on_color.green = | |||
| 504 | core->on_color.blue = (min_inten | min_inten << 8); | |||
| 505 | core->off_color.red = | |||
| 506 | core->off_color.green = | |||
| 507 | core->off_color.blue = (max_inten | max_inten << 8); | |||
| 508 | return True1; | |||
| 509 | } | |||
| 510 | ||||
| 511 | static Boolint | |||
| 512 | _XcursorThreshold (const XcursorImage *image, XcursorCoreCursor *core) | |||
| 513 | { | |||
| 514 | XcursorPixel *pixel, p; | |||
| 515 | int x, y; | |||
| 516 | ||||
| 517 | /* | |||
| 518 | * Draw the image, picking black for dark pixels and white for light | |||
| 519 | */ | |||
| 520 | pixel = image->pixels; | |||
| 521 | for (y = 0; y < image->height; y++) | |||
| 522 | for (x = 0; x < image->width; x++) | |||
| 523 | { | |||
| 524 | p = *pixel++; | |||
| 525 | if ((p >> 24) >= 0x80) | |||
| 526 | { | |||
| 527 | XPutPixel (core->msk_image, x, y, 1)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (1))); | |||
| 528 | if (_XcursorPixelBrightness (p) > 0x80) | |||
| 529 | XPutPixel (core->src_image, x, y, 0)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (0))); | |||
| 530 | else | |||
| 531 | XPutPixel (core->src_image, x, y, 1)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (1))); | |||
| 532 | } | |||
| 533 | else | |||
| 534 | { | |||
| 535 | XPutPixel (core->msk_image, x, y, 0)((*((core->msk_image)->f.put_pixel))((core->msk_image ), (x), (y), (0))); | |||
| 536 | XPutPixel (core->src_image, x, y, 0)((*((core->src_image)->f.put_pixel))((core->src_image ), (x), (y), (0))); | |||
| 537 | } | |||
| 538 | } | |||
| 539 | core->on_color.red = | |||
| 540 | core->on_color.green = | |||
| 541 | core->on_color.blue = 0; | |||
| 542 | core->off_color.red = | |||
| 543 | core->off_color.green = | |||
| 544 | core->off_color.blue = 0xffff; | |||
| 545 | return True1; | |||
| 546 | } | |||
| 547 | ||||
| 548 | Cursor | |||
| 549 | XcursorImageLoadCursor (Display *dpy, const XcursorImage *image) | |||
| 550 | { | |||
| 551 | Cursor cursor; | |||
| 552 | ||||
| 553 | #if RENDER_MAJOR0 > 0 || RENDER_MINOR11 >= 5 | |||
| 554 | if (XcursorSupportsARGB (dpy)) | |||
| 555 | { | |||
| 556 | XImage ximage; | |||
| 557 | int screen = DefaultScreen (dpy)(((_XPrivDisplay)(dpy))->default_screen); | |||
| 558 | Pixmap pixmap; | |||
| 559 | Picture picture; | |||
| 560 | GC gc; | |||
| 561 | XRenderPictFormat *format; | |||
| 562 | ||||
| 563 | ximage.width = image->width; | |||
| 564 | ximage.height = image->height; | |||
| 565 | ximage.xoffset = 0; | |||
| 566 | ximage.format = ZPixmap2; | |||
| 567 | ximage.data = (char *) image->pixels; | |||
| 568 | ximage.byte_order = nativeByteOrder (); | |||
| 569 | ximage.bitmap_unit = 32; | |||
| 570 | ximage.bitmap_bit_order = ximage.byte_order; | |||
| 571 | ximage.bitmap_pad = 32; | |||
| 572 | ximage.depth = 32; | |||
| 573 | ximage.bits_per_pixel = 32; | |||
| 574 | ximage.bytes_per_line = image->width * 4; | |||
| 575 | ximage.red_mask = 0xff0000; | |||
| 576 | ximage.green_mask = 0x00ff00; | |||
| 577 | ximage.blue_mask = 0x0000ff; | |||
| 578 | ximage.obdata = NULL((void*)0); | |||
| 579 | if (!XInitImage (&ximage)) | |||
| 580 | return None0L; | |||
| 581 | pixmap = XCreatePixmap (dpy, RootWindow (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->root), | |||
| 582 | image->width, image->height, 32); | |||
| 583 | gc = XCreateGC (dpy, pixmap, 0, NULL((void*)0)); | |||
| 584 | XPutImage (dpy, pixmap, gc, &ximage, | |||
| 585 | 0, 0, 0, 0, image->width, image->height); | |||
| 586 | XFreeGC (dpy, gc); | |||
| 587 | format = XRenderFindStandardFormat (dpy, PictStandardARGB320); | |||
| 588 | picture = XRenderCreatePicture (dpy, pixmap, format, 0, NULL((void*)0)); | |||
| 589 | XFreePixmap (dpy, pixmap); | |||
| 590 | cursor = XRenderCreateCursor (dpy, picture, | |||
| 591 | image->xhot, image->yhot); | |||
| 592 | XRenderFreePicture (dpy, picture); | |||
| 593 | } | |||
| 594 | else | |||
| 595 | #endif | |||
| 596 | { | |||
| 597 | XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); | |||
| 598 | int screen = DefaultScreen (dpy)(((_XPrivDisplay)(dpy))->default_screen); | |||
| 599 | XcursorCoreCursor core; | |||
| 600 | Pixmap src_pixmap, msk_pixmap; | |||
| 601 | GC gc; | |||
| 602 | XGCValues gcv; | |||
| 603 | ||||
| 604 | if (!info) | |||
| 605 | return 0; | |||
| 606 | ||||
| 607 | core.src_image = XCreateImage (dpy, NULL((void*)0), 1, ZPixmap2, | |||
| 608 | 0, NULL((void*)0), image->width, image->height, | |||
| 609 | 32, 0); | |||
| 610 | core.src_image->data = Xmalloc (image->height *malloc(((image->height * core.src_image->bytes_per_line ) == 0 ? 1 : (image->height * core.src_image->bytes_per_line ))) | |||
| 611 | core.src_image->bytes_per_line)malloc(((image->height * core.src_image->bytes_per_line ) == 0 ? 1 : (image->height * core.src_image->bytes_per_line ))); | |||
| 612 | core.msk_image = XCreateImage (dpy, NULL((void*)0), 1, ZPixmap2, | |||
| 613 | 0, NULL((void*)0), image->width, image->height, | |||
| 614 | 32, 0); | |||
| 615 | core.msk_image->data = Xmalloc (image->height *malloc(((image->height * core.msk_image->bytes_per_line ) == 0 ? 1 : (image->height * core.msk_image->bytes_per_line ))) | |||
| 616 | core.msk_image->bytes_per_line)malloc(((image->height * core.msk_image->bytes_per_line ) == 0 ? 1 : (image->height * core.msk_image->bytes_per_line ))); | |||
| 617 | ||||
| 618 | switch (info->dither) { | |||
| 619 | case XcursorDitherThreshold: | |||
| 620 | if (!_XcursorThreshold (image, &core)) | |||
| 621 | return 0; | |||
| 622 | break; | |||
| 623 | case XcursorDitherMedian: | |||
| 624 | if (!_XcursorHeckbertMedianCut (image, &core)) | |||
| 625 | return 0; | |||
| 626 | break; | |||
| 627 | case XcursorDitherOrdered: | |||
| 628 | if (!_XcursorBayerOrderedDither (image, &core)) | |||
| 629 | return 0; | |||
| 630 | break; | |||
| 631 | case XcursorDitherDiffuse: | |||
| 632 | if (!_XcursorFloydSteinberg (image, &core)) | |||
| 633 | return 0; | |||
| 634 | break; | |||
| 635 | default: | |||
| 636 | return 0; | |||
| 637 | } | |||
| 638 | ||||
| 639 | /* | |||
| 640 | * Create the cursor | |||
| 641 | */ | |||
| 642 | src_pixmap = XCreatePixmap (dpy, RootWindow (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->root), | |||
| 643 | image->width, image->height, 1); | |||
| 644 | msk_pixmap = XCreatePixmap (dpy, RootWindow (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->root), | |||
| 645 | image->width, image->height, 1); | |||
| 646 | gcv.foreground = 1; | |||
| 647 | gcv.background = 0; | |||
| 648 | gc = XCreateGC (dpy, src_pixmap, | |||
| 649 | GCForeground(1L<<2)|GCBackground(1L<<3), | |||
| 650 | &gcv); | |||
| 651 | XPutImage (dpy, src_pixmap, gc, core.src_image, | |||
| 652 | 0, 0, 0, 0, image->width, image->height); | |||
| 653 | ||||
| 654 | XPutImage (dpy, msk_pixmap, gc, core.msk_image, | |||
| 655 | 0, 0, 0, 0, image->width, image->height); | |||
| 656 | XFreeGC (dpy, gc); | |||
| 657 | ||||
| 658 | #ifdef DEBUG_IMAGE | |||
| 659 | _XcursorDumpColor (&core.on_color, "on_color"); | |||
| 660 | _XcursorDumpColor (&core.off_color, "off_color"); | |||
| 661 | _XcursorDumpImage (core.src_image); | |||
| 662 | _XcursorDumpImage (core.msk_image); | |||
| 663 | #endif | |||
| 664 | XDestroyImage (core.src_image)((*((core.src_image)->f.destroy_image))((core.src_image))); | |||
| 665 | XDestroyImage (core.msk_image)((*((core.msk_image)->f.destroy_image))((core.msk_image))); | |||
| 666 | ||||
| 667 | cursor = XCreatePixmapCursor (dpy, src_pixmap, msk_pixmap, | |||
| 668 | &core.on_color, &core.off_color, | |||
| 669 | image->xhot, image->yhot); | |||
| 670 | XFreePixmap (dpy, src_pixmap); | |||
| 671 | XFreePixmap (dpy, msk_pixmap); | |||
| 672 | } | |||
| 673 | return cursor; | |||
| 674 | } | |||
| 675 | ||||
| 676 | XcursorCursors * | |||
| 677 | XcursorImagesLoadCursors (Display *dpy, const XcursorImages *images) | |||
| 678 | { | |||
| 679 | XcursorCursors *cursors = XcursorCursorsCreate (dpy, images->nimage); | |||
| 680 | int n; | |||
| 681 | ||||
| 682 | if (!cursors) | |||
| 683 | return NULL((void*)0); | |||
| 684 | for (n = 0; n < images->nimage; n++) | |||
| 685 | { | |||
| 686 | cursors->cursors[n] = XcursorImageLoadCursor (dpy, images->images[n]); | |||
| 687 | if (!cursors->cursors[n]) | |||
| 688 | { | |||
| 689 | XcursorCursorsDestroy (cursors); | |||
| 690 | return NULL((void*)0); | |||
| 691 | } | |||
| 692 | cursors->ncursor++; | |||
| 693 | } | |||
| 694 | return cursors; | |||
| 695 | } | |||
| 696 | ||||
| 697 | Cursor | |||
| 698 | XcursorImagesLoadCursor (Display *dpy, const XcursorImages *images) | |||
| 699 | { | |||
| 700 | Cursor cursor; | |||
| 701 | if (images->nimage == 1 || !XcursorSupportsAnim (dpy)) | |||
| 702 | cursor = XcursorImageLoadCursor (dpy, images->images[0]); | |||
| 703 | else | |||
| 704 | { | |||
| 705 | XcursorCursors *cursors = XcursorImagesLoadCursors (dpy, images); | |||
| 706 | XAnimCursor *anim; | |||
| 707 | int n; | |||
| 708 | ||||
| 709 | if (!cursors) | |||
| 710 | return 0; | |||
| 711 | anim = malloc (cursors->ncursor * sizeof (XAnimCursor)); | |||
| 712 | if (!anim) | |||
| 713 | { | |||
| 714 | XcursorCursorsDestroy (cursors); | |||
| 715 | return 0; | |||
| 716 | } | |||
| 717 | for (n = 0; n < cursors->ncursor; n++) | |||
| 718 | { | |||
| 719 | anim[n].cursor = cursors->cursors[n]; | |||
| 720 | anim[n].delay = images->images[n]->delay; | |||
| 721 | } | |||
| 722 | cursor = XRenderCreateAnimCursor (dpy, cursors->ncursor, anim); | |||
| 723 | XcursorCursorsDestroy(cursors); | |||
| 724 | free (anim); | |||
| 725 | } | |||
| 726 | #if defined HAVE_XFIXES1 && XFIXES_MAJOR5 >= 2 | |||
| 727 | if (images->name) | |||
| 728 | XFixesSetCursorName (dpy, cursor, images->name); | |||
| 729 | #endif | |||
| 730 | return cursor; | |||
| 731 | } | |||
| 732 | ||||
| 733 | ||||
| 734 | Cursor | |||
| 735 | XcursorFilenameLoadCursor (Display *dpy, const char *file) | |||
| 736 | { | |||
| 737 | int size = XcursorGetDefaultSize (dpy); | |||
| 738 | XcursorImages *images = XcursorFilenameLoadImages (file, size); | |||
| 739 | Cursor cursor; | |||
| 740 | ||||
| 741 | if (!images) | |||
| 742 | return None0L; | |||
| 743 | cursor = XcursorImagesLoadCursor (dpy, images); | |||
| 744 | XcursorImagesDestroy (images); | |||
| 745 | return cursor; | |||
| 746 | } | |||
| 747 | ||||
| 748 | XcursorCursors * | |||
| 749 | XcursorFilenameLoadCursors (Display *dpy, const char *file) | |||
| 750 | { | |||
| 751 | int size = XcursorGetDefaultSize (dpy); | |||
| 752 | XcursorImages *images = XcursorFilenameLoadImages (file, size); | |||
| 753 | XcursorCursors *cursors; | |||
| 754 | ||||
| 755 | if (!images) | |||
| ||||
| 756 | return NULL((void*)0); | |||
| 757 | cursors = XcursorImagesLoadCursors (dpy, images); | |||
| 758 | XcursorImagesDestroy (images); | |||
| 759 | return cursors; | |||
| 760 | } | |||
| 761 | ||||
| 762 | /* | |||
| 763 | * Stolen from XCreateGlyphCursor (which we cruelly override) | |||
| 764 | */ | |||
| 765 | ||||
| 766 | Cursor | |||
| 767 | _XcursorCreateGlyphCursor(Display *dpy, | |||
| 768 | Font source_font, | |||
| 769 | Font mask_font, | |||
| 770 | unsigned int source_char, | |||
| 771 | unsigned int mask_char, | |||
| 772 | XColor _Xconstconst *foreground, | |||
| 773 | XColor _Xconstconst *background) | |||
| 774 | { | |||
| 775 | Cursor cid; | |||
| 776 | register xCreateGlyphCursorReq *req; | |||
| 777 | ||||
| 778 | LockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->lock_display )(dpy); | |||
| 779 | GetReq(CreateGlyphCursor, req)req = (xCreateGlyphCursorReq *) _XGetRequest(dpy, 94, 32); | |||
| 780 | cid = req->cid = XAllocID(dpy)((*((_XPrivDisplay)(dpy))->resource_alloc)((dpy))); | |||
| 781 | req->source = source_font; | |||
| 782 | req->mask = mask_font; | |||
| 783 | req->sourceChar = source_char; | |||
| 784 | req->maskChar = mask_char; | |||
| 785 | req->foreRed = foreground->red; | |||
| 786 | req->foreGreen = foreground->green; | |||
| 787 | req->foreBlue = foreground->blue; | |||
| 788 | req->backRed = background->red; | |||
| 789 | req->backGreen = background->green; | |||
| 790 | req->backBlue = background->blue; | |||
| 791 | UnlockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->unlock_display )(dpy); | |||
| 792 | SyncHandle()if (dpy->synchandler) (*dpy->synchandler)(dpy); | |||
| 793 | return (cid); | |||
| 794 | } | |||
| 795 | ||||
| 796 | /* | |||
| 797 | * Stolen from XCreateFontCursor (which we cruelly override) | |||
| 798 | */ | |||
| 799 | ||||
| 800 | Cursor | |||
| 801 | _XcursorCreateFontCursor (Display *dpy, unsigned int shape) | |||
| 802 | { | |||
| 803 | static XColor _Xconstconst foreground = { 0, 0, 0, 0 }; /* black */ | |||
| 804 | static XColor _Xconstconst background = { 0, 65535, 65535, 65535 }; /* white */ | |||
| 805 | ||||
| 806 | /* | |||
| 807 | * the cursor font contains the shape glyph followed by the mask | |||
| 808 | * glyph; so character position 0 contains a shape, 1 the mask for 0, | |||
| 809 | * 2 a shape, etc. <X11/cursorfont.h> contains hash define names | |||
| 810 | * for all of these. | |||
| 811 | */ | |||
| 812 | ||||
| 813 | if (dpy->cursor_font == None0L) | |||
| 814 | { | |||
| 815 | dpy->cursor_font = XLoadFont (dpy, CURSORFONT"cursor"); | |||
| 816 | if (dpy->cursor_font == None0L) | |||
| 817 | return None0L; | |||
| 818 | } | |||
| 819 | ||||
| 820 | return _XcursorCreateGlyphCursor (dpy, dpy->cursor_font, dpy->cursor_font, | |||
| 821 | shape, shape + 1, &foreground, &background); | |||
| 822 | } | |||
| 823 |