| File: | render/filter.c |
| Location: | line 339, column 30 |
| Description: | Call to 'malloc' has an allocation size of 0 bytes |
| 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 | #ifdef HAVE_DIX_CONFIG_H1 | |||
| 24 | #include <dix-config.h> | |||
| 25 | #endif | |||
| 26 | ||||
| 27 | #include "misc.h" | |||
| 28 | #include "scrnintstr.h" | |||
| 29 | #include "os.h" | |||
| 30 | #include "regionstr.h" | |||
| 31 | #include "validate.h" | |||
| 32 | #include "windowstr.h" | |||
| 33 | #include "input.h" | |||
| 34 | #include "resource.h" | |||
| 35 | #include "colormapst.h" | |||
| 36 | #include "cursorstr.h" | |||
| 37 | #include "dixstruct.h" | |||
| 38 | #include "gcstruct.h" | |||
| 39 | #include "servermd.h" | |||
| 40 | #include "picturestr.h" | |||
| 41 | ||||
| 42 | static char **filterNames; | |||
| 43 | static int nfilterNames; | |||
| 44 | ||||
| 45 | /* | |||
| 46 | * standard but not required filters don't have constant indices | |||
| 47 | */ | |||
| 48 | ||||
| 49 | int | |||
| 50 | PictureGetFilterId(const char *filter, int len, Bool makeit) | |||
| 51 | { | |||
| 52 | int i; | |||
| 53 | char *name; | |||
| 54 | char **names; | |||
| 55 | ||||
| 56 | if (len < 0) | |||
| 57 | len = strlen(filter); | |||
| 58 | for (i = 0; i < nfilterNames; i++) | |||
| 59 | if (!CompareISOLatin1Lowered((const unsigned char *) filterNames[i], -1, | |||
| 60 | (const unsigned char *) filter, len)) | |||
| 61 | return i; | |||
| 62 | if (!makeit) | |||
| 63 | return -1; | |||
| 64 | name = malloc(len + 1); | |||
| 65 | if (!name) | |||
| 66 | return -1; | |||
| 67 | memcpy(name, filter, len)__builtin___memcpy_chk (name, filter, len, __builtin_object_size (name, 0)); | |||
| 68 | name[len] = '\0'; | |||
| 69 | if (filterNames) | |||
| 70 | names = realloc(filterNames, (nfilterNames + 1) * sizeof(char *)); | |||
| 71 | else | |||
| 72 | names = malloc(sizeof(char *)); | |||
| 73 | if (!names) { | |||
| 74 | free(name); | |||
| 75 | return -1; | |||
| 76 | } | |||
| 77 | filterNames = names; | |||
| 78 | i = nfilterNames++; | |||
| 79 | filterNames[i] = name; | |||
| 80 | return i; | |||
| 81 | } | |||
| 82 | ||||
| 83 | static Bool | |||
| 84 | PictureSetDefaultIds(void) | |||
| 85 | { | |||
| 86 | /* careful here -- this list must match the #define values */ | |||
| 87 | ||||
| 88 | if (PictureGetFilterId(FilterNearest"nearest", -1, TRUE1) != PictFilterNearest0) | |||
| 89 | return FALSE0; | |||
| 90 | if (PictureGetFilterId(FilterBilinear"bilinear", -1, TRUE1) != PictFilterBilinear1) | |||
| 91 | return FALSE0; | |||
| 92 | ||||
| 93 | if (PictureGetFilterId(FilterFast"fast", -1, TRUE1) != PictFilterFast2) | |||
| 94 | return FALSE0; | |||
| 95 | if (PictureGetFilterId(FilterGood"good", -1, TRUE1) != PictFilterGood3) | |||
| 96 | return FALSE0; | |||
| 97 | if (PictureGetFilterId(FilterBest"best", -1, TRUE1) != PictFilterBest4) | |||
| 98 | return FALSE0; | |||
| 99 | ||||
| 100 | if (PictureGetFilterId(FilterConvolution"convolution", -1, TRUE1) != | |||
| 101 | PictFilterConvolution5) | |||
| 102 | return FALSE0; | |||
| 103 | return TRUE1; | |||
| 104 | } | |||
| 105 | ||||
| 106 | char * | |||
| 107 | PictureGetFilterName(int id) | |||
| 108 | { | |||
| 109 | if (0 <= id && id < nfilterNames) | |||
| 110 | return filterNames[id]; | |||
| 111 | else | |||
| 112 | return 0; | |||
| 113 | } | |||
| 114 | ||||
| 115 | static void | |||
| 116 | PictureFreeFilterIds(void) | |||
| 117 | { | |||
| 118 | int i; | |||
| 119 | ||||
| 120 | for (i = 0; i < nfilterNames; i++) | |||
| 121 | free(filterNames[i]); | |||
| 122 | free(filterNames); | |||
| 123 | nfilterNames = 0; | |||
| 124 | filterNames = 0; | |||
| 125 | } | |||
| 126 | ||||
| 127 | int | |||
| 128 | PictureAddFilter(ScreenPtr pScreen, | |||
| 129 | const char *filter, | |||
| 130 | PictFilterValidateParamsProcPtr ValidateParams, | |||
| 131 | int width, int height) | |||
| 132 | { | |||
| 133 | PictureScreenPtr ps = GetPictureScreen(pScreen)((PictureScreenPtr)dixLookupPrivate(&(pScreen)->devPrivates , (&PictureScreenPrivateKeyRec))); | |||
| 134 | int id = PictureGetFilterId(filter, -1, TRUE1); | |||
| 135 | int i; | |||
| 136 | PictFilterPtr filters; | |||
| 137 | ||||
| 138 | if (id < 0) | |||
| 139 | return -1; | |||
| 140 | /* | |||
| 141 | * It's an error to attempt to reregister a filter | |||
| 142 | */ | |||
| 143 | for (i = 0; i < ps->nfilters; i++) | |||
| 144 | if (ps->filters[i].id == id) | |||
| 145 | return -1; | |||
| 146 | if (ps->filters) | |||
| 147 | filters = | |||
| 148 | realloc(ps->filters, (ps->nfilters + 1) * sizeof(PictFilterRec)); | |||
| 149 | else | |||
| 150 | filters = malloc(sizeof(PictFilterRec)); | |||
| 151 | if (!filters) | |||
| 152 | return -1; | |||
| 153 | ps->filters = filters; | |||
| 154 | i = ps->nfilters++; | |||
| 155 | ps->filters[i].name = PictureGetFilterName(id); | |||
| 156 | ps->filters[i].id = id; | |||
| 157 | ps->filters[i].ValidateParams = ValidateParams; | |||
| 158 | ps->filters[i].width = width; | |||
| 159 | ps->filters[i].height = height; | |||
| 160 | return id; | |||
| 161 | } | |||
| 162 | ||||
| 163 | Bool | |||
| 164 | PictureSetFilterAlias(ScreenPtr pScreen, const char *filter, const char *alias) | |||
| 165 | { | |||
| 166 | PictureScreenPtr ps = GetPictureScreen(pScreen)((PictureScreenPtr)dixLookupPrivate(&(pScreen)->devPrivates , (&PictureScreenPrivateKeyRec))); | |||
| 167 | int filter_id = PictureGetFilterId(filter, -1, FALSE0); | |||
| 168 | int alias_id = PictureGetFilterId(alias, -1, TRUE1); | |||
| 169 | int i; | |||
| 170 | ||||
| 171 | if (filter_id < 0 || alias_id < 0) | |||
| 172 | return FALSE0; | |||
| 173 | for (i = 0; i < ps->nfilterAliases; i++) | |||
| 174 | if (ps->filterAliases[i].alias_id == alias_id) | |||
| 175 | break; | |||
| 176 | if (i == ps->nfilterAliases) { | |||
| 177 | PictFilterAliasPtr aliases; | |||
| 178 | ||||
| 179 | if (ps->filterAliases) | |||
| 180 | aliases = realloc(ps->filterAliases, | |||
| 181 | (ps->nfilterAliases + 1) * | |||
| 182 | sizeof(PictFilterAliasRec)); | |||
| 183 | else | |||
| 184 | aliases = malloc(sizeof(PictFilterAliasRec)); | |||
| 185 | if (!aliases) | |||
| 186 | return FALSE0; | |||
| 187 | ps->filterAliases = aliases; | |||
| 188 | ps->filterAliases[i].alias = PictureGetFilterName(alias_id); | |||
| 189 | ps->filterAliases[i].alias_id = alias_id; | |||
| 190 | ps->nfilterAliases++; | |||
| 191 | } | |||
| 192 | ps->filterAliases[i].filter_id = filter_id; | |||
| 193 | return TRUE1; | |||
| 194 | } | |||
| 195 | ||||
| 196 | PictFilterPtr | |||
| 197 | PictureFindFilter(ScreenPtr pScreen, char *name, int len) | |||
| 198 | { | |||
| 199 | PictureScreenPtr ps = GetPictureScreen(pScreen)((PictureScreenPtr)dixLookupPrivate(&(pScreen)->devPrivates , (&PictureScreenPrivateKeyRec))); | |||
| 200 | int id = PictureGetFilterId(name, len, FALSE0); | |||
| 201 | int i; | |||
| 202 | ||||
| 203 | if (id < 0) | |||
| 204 | return 0; | |||
| 205 | /* Check for an alias, allow them to recurse */ | |||
| 206 | for (i = 0; i < ps->nfilterAliases; i++) | |||
| 207 | if (ps->filterAliases[i].alias_id == id) { | |||
| 208 | id = ps->filterAliases[i].filter_id; | |||
| 209 | i = 0; | |||
| 210 | } | |||
| 211 | /* find the filter */ | |||
| 212 | for (i = 0; i < ps->nfilters; i++) | |||
| 213 | if (ps->filters[i].id == id) | |||
| 214 | return &ps->filters[i]; | |||
| 215 | return 0; | |||
| 216 | } | |||
| 217 | ||||
| 218 | static Bool | |||
| 219 | convolutionFilterValidateParams(ScreenPtr pScreen, | |||
| 220 | int filter, | |||
| 221 | xFixed * params, | |||
| 222 | int nparams, int *width, int *height) | |||
| 223 | { | |||
| 224 | int w, h; | |||
| 225 | ||||
| 226 | if (nparams < 3) | |||
| 227 | return FALSE0; | |||
| 228 | ||||
| 229 | if (xFixedFrac(params[0])((params[0]) & ((((pixman_fixed_t) ((1) << 16))) - ( (pixman_fixed_t) 1))) || xFixedFrac(params[1])((params[1]) & ((((pixman_fixed_t) ((1) << 16))) - ( (pixman_fixed_t) 1)))) | |||
| 230 | return FALSE0; | |||
| 231 | ||||
| 232 | w = xFixedToInt(params[0])((int) ((params[0]) >> 16)); | |||
| 233 | h = xFixedToInt(params[1])((int) ((params[1]) >> 16)); | |||
| 234 | ||||
| 235 | nparams -= 2; | |||
| 236 | if (w * h > nparams) | |||
| 237 | return FALSE0; | |||
| 238 | ||||
| 239 | *width = w; | |||
| 240 | *height = h; | |||
| 241 | return TRUE1; | |||
| 242 | } | |||
| 243 | ||||
| 244 | Bool | |||
| 245 | PictureSetDefaultFilters(ScreenPtr pScreen) | |||
| 246 | { | |||
| 247 | if (!filterNames) | |||
| 248 | if (!PictureSetDefaultIds()) | |||
| 249 | return FALSE0; | |||
| 250 | if (PictureAddFilter(pScreen, FilterNearest"nearest", 0, 1, 1) < 0) | |||
| 251 | return FALSE0; | |||
| 252 | if (PictureAddFilter(pScreen, FilterBilinear"bilinear", 0, 2, 2) < 0) | |||
| 253 | return FALSE0; | |||
| 254 | ||||
| 255 | if (!PictureSetFilterAlias(pScreen, FilterNearest"nearest", FilterFast"fast")) | |||
| 256 | return FALSE0; | |||
| 257 | if (!PictureSetFilterAlias(pScreen, FilterBilinear"bilinear", FilterGood"good")) | |||
| 258 | return FALSE0; | |||
| 259 | if (!PictureSetFilterAlias(pScreen, FilterBilinear"bilinear", FilterBest"best")) | |||
| 260 | return FALSE0; | |||
| 261 | ||||
| 262 | if (PictureAddFilter | |||
| 263 | (pScreen, FilterConvolution"convolution", convolutionFilterValidateParams, 0, 0) < 0) | |||
| 264 | return FALSE0; | |||
| 265 | ||||
| 266 | return TRUE1; | |||
| 267 | } | |||
| 268 | ||||
| 269 | void | |||
| 270 | PictureResetFilters(ScreenPtr pScreen) | |||
| 271 | { | |||
| 272 | PictureScreenPtr ps = GetPictureScreen(pScreen)((PictureScreenPtr)dixLookupPrivate(&(pScreen)->devPrivates , (&PictureScreenPrivateKeyRec))); | |||
| 273 | ||||
| 274 | free(ps->filters); | |||
| 275 | free(ps->filterAliases); | |||
| 276 | ||||
| 277 | /* Free the filters when the last screen is closed */ | |||
| 278 | if (pScreen->myNum == 0) | |||
| 279 | PictureFreeFilterIds(); | |||
| 280 | } | |||
| 281 | ||||
| 282 | int | |||
| 283 | SetPictureFilter(PicturePtr pPicture, char *name, int len, xFixed * params, | |||
| 284 | int nparams) | |||
| 285 | { | |||
| 286 | PictFilterPtr pFilter; | |||
| 287 | ScreenPtr pScreen; | |||
| 288 | ||||
| 289 | if (pPicture->pDrawable != NULL((void*)0)) | |||
| ||||
| 290 | pScreen = pPicture->pDrawable->pScreen; | |||
| 291 | else | |||
| 292 | pScreen = screenInfo.screens[0]; | |||
| 293 | ||||
| 294 | pFilter = PictureFindFilter(pScreen, name, len); | |||
| 295 | ||||
| 296 | if (!pFilter) | |||
| 297 | return BadName15; | |||
| 298 | ||||
| 299 | if (pPicture->pDrawable == NULL((void*)0)) { | |||
| 300 | int s; | |||
| 301 | ||||
| 302 | /* For source pictures, the picture isn't tied to a screen. So, ensure | |||
| 303 | * that all screens can handle a filter we set for the picture. | |||
| 304 | */ | |||
| 305 | for (s = 1; s < screenInfo.numScreens; s++) { | |||
| 306 | PictFilterPtr pScreenFilter; | |||
| 307 | ||||
| 308 | pScreenFilter = PictureFindFilter(screenInfo.screens[s], name, len); | |||
| 309 | if (!pScreenFilter || pScreenFilter->id != pFilter->id) | |||
| 310 | return BadMatch8; | |||
| 311 | } | |||
| 312 | } | |||
| 313 | return SetPicturePictFilter(pPicture, pFilter, params, nparams); | |||
| 314 | } | |||
| 315 | ||||
| 316 | int | |||
| 317 | SetPicturePictFilter(PicturePtr pPicture, PictFilterPtr pFilter, | |||
| 318 | xFixed * params, int nparams) | |||
| 319 | { | |||
| 320 | ScreenPtr pScreen; | |||
| 321 | int i; | |||
| 322 | ||||
| 323 | if (pPicture->pDrawable) | |||
| 324 | pScreen = pPicture->pDrawable->pScreen; | |||
| 325 | else | |||
| 326 | pScreen = screenInfo.screens[0]; | |||
| 327 | ||||
| 328 | if (pFilter->ValidateParams) { | |||
| 329 | int width, height; | |||
| 330 | ||||
| 331 | if (!(*pFilter->ValidateParams) | |||
| 332 | (pScreen, pFilter->id, params, nparams, &width, &height)) | |||
| 333 | return BadMatch8; | |||
| 334 | } | |||
| 335 | else if (nparams) | |||
| 336 | return BadMatch8; | |||
| 337 | ||||
| 338 | if (nparams != pPicture->filter_nparams) { | |||
| 339 | xFixed *new_params = malloc(nparams * sizeof(xFixed)); | |||
| ||||
| 340 | ||||
| 341 | if (!new_params && nparams) | |||
| 342 | return BadAlloc11; | |||
| 343 | free(pPicture->filter_params); | |||
| 344 | pPicture->filter_params = new_params; | |||
| 345 | pPicture->filter_nparams = nparams; | |||
| 346 | } | |||
| 347 | for (i = 0; i < nparams; i++) | |||
| 348 | pPicture->filter_params[i] = params[i]; | |||
| 349 | pPicture->filter = pFilter->id; | |||
| 350 | ||||
| 351 | if (pPicture->pDrawable) { | |||
| 352 | PictureScreenPtr ps = GetPictureScreen(pScreen)((PictureScreenPtr)dixLookupPrivate(&(pScreen)->devPrivates , (&PictureScreenPrivateKeyRec))); | |||
| 353 | int result; | |||
| 354 | ||||
| 355 | result = (*ps->ChangePictureFilter) (pPicture, pPicture->filter, | |||
| 356 | params, nparams); | |||
| 357 | return result; | |||
| 358 | } | |||
| 359 | return Success0; | |||
| 360 | } |