| File: | hw/xnest/GC.c |
| Location: | line 145, column 23 |
| Description: | Access to field 'font_struct' results in a dereference of a null pointer |
| 1 | /* | |||||
| 2 | ||||||
| 3 | Copyright 1993 by Davor Matic | |||||
| 4 | ||||||
| 5 | Permission to use, copy, modify, distribute, and sell this software | |||||
| 6 | and its documentation for any purpose is hereby granted without fee, | |||||
| 7 | provided that the above copyright notice appear in all copies and that | |||||
| 8 | both that copyright notice and this permission notice appear in | |||||
| 9 | supporting documentation. Davor Matic makes no representations about | |||||
| 10 | the suitability of this software for any purpose. It is provided "as | |||||
| 11 | is" without express or implied warranty. | |||||
| 12 | ||||||
| 13 | */ | |||||
| 14 | ||||||
| 15 | #ifdef HAVE_XNEST_CONFIG_H1 | |||||
| 16 | #include <xnest-config.h> | |||||
| 17 | #endif | |||||
| 18 | ||||||
| 19 | #include <X11/X.h> | |||||
| 20 | #include <X11/Xproto.h> | |||||
| 21 | #include "gcstruct.h" | |||||
| 22 | #include "windowstr.h" | |||||
| 23 | #include "pixmapstr.h" | |||||
| 24 | #include "scrnintstr.h" | |||||
| 25 | #include <X11/fonts/fontstruct.h> | |||||
| 26 | #include "mistruct.h" | |||||
| 27 | #include "region.h" | |||||
| 28 | ||||||
| 29 | #include "Xnest.h" | |||||
| 30 | ||||||
| 31 | #include "Display.h" | |||||
| 32 | #include "XNGC.h" | |||||
| 33 | #include "GCOps.h" | |||||
| 34 | #include "Drawable.h" | |||||
| 35 | #include "XNFont.h" | |||||
| 36 | #include "Color.h" | |||||
| 37 | ||||||
| 38 | DevPrivateKeyRec xnestGCPrivateKeyRec; | |||||
| 39 | ||||||
| 40 | static GCFuncs xnestFuncs = { | |||||
| 41 | xnestValidateGC, | |||||
| 42 | xnestChangeGC, | |||||
| 43 | xnestCopyGC, | |||||
| 44 | xnestDestroyGC, | |||||
| 45 | xnestChangeClip, | |||||
| 46 | xnestDestroyClip, | |||||
| 47 | xnestCopyClip, | |||||
| 48 | }; | |||||
| 49 | ||||||
| 50 | static GCOps xnestOps = { | |||||
| 51 | xnestFillSpans, | |||||
| 52 | xnestSetSpans, | |||||
| 53 | xnestPutImage, | |||||
| 54 | xnestCopyArea, | |||||
| 55 | xnestCopyPlane, | |||||
| 56 | xnestPolyPoint, | |||||
| 57 | xnestPolylines, | |||||
| 58 | xnestPolySegment, | |||||
| 59 | xnestPolyRectangle, | |||||
| 60 | xnestPolyArc, | |||||
| 61 | xnestFillPolygon, | |||||
| 62 | xnestPolyFillRect, | |||||
| 63 | xnestPolyFillArc, | |||||
| 64 | xnestPolyText8, | |||||
| 65 | xnestPolyText16, | |||||
| 66 | xnestImageText8, | |||||
| 67 | xnestImageText16, | |||||
| 68 | xnestImageGlyphBlt, | |||||
| 69 | xnestPolyGlyphBlt, | |||||
| 70 | xnestPushPixels | |||||
| 71 | }; | |||||
| 72 | ||||||
| 73 | Boolint | |||||
| 74 | xnestCreateGC(GCPtr pGC) | |||||
| 75 | { | |||||
| 76 | pGC->funcs = &xnestFuncs; | |||||
| 77 | pGC->ops = &xnestOps; | |||||
| 78 | ||||||
| 79 | pGC->miTranslate = 1; | |||||
| 80 | ||||||
| 81 | xnestGCPriv(pGC)((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates, (&xnestGCPrivateKeyRec)))->gc = XCreateGC(xnestDisplay, | |||||
| 82 | xnestDefaultDrawables[pGC->depth], | |||||
| 83 | 0L, NULL((void*)0)); | |||||
| 84 | ||||||
| 85 | return True1; | |||||
| 86 | } | |||||
| 87 | ||||||
| 88 | void | |||||
| 89 | xnestValidateGC(GCPtr pGC, unsigned long changes, DrawablePtr pDrawable) | |||||
| 90 | { | |||||
| 91 | } | |||||
| 92 | ||||||
| 93 | void | |||||
| 94 | xnestChangeGC(GCPtr pGC, unsigned long mask) | |||||
| 95 | { | |||||
| 96 | XGCValues values; | |||||
| 97 | ||||||
| 98 | if (mask & GCFunction(1L<<0)) | |||||
| ||||||
| 99 | values.function = pGC->alu; | |||||
| 100 | ||||||
| 101 | if (mask & GCPlaneMask(1L<<1)) | |||||
| 102 | values.plane_mask = pGC->planemask; | |||||
| 103 | ||||||
| 104 | if (mask & GCForeground(1L<<2)) | |||||
| 105 | values.foreground = xnestPixel(pGC->fgPixel)(pGC->fgPixel); | |||||
| 106 | ||||||
| 107 | if (mask & GCBackground(1L<<3)) | |||||
| 108 | values.background = xnestPixel(pGC->bgPixel)(pGC->bgPixel); | |||||
| 109 | ||||||
| 110 | if (mask & GCLineWidth(1L<<4)) | |||||
| 111 | values.line_width = pGC->lineWidth; | |||||
| 112 | ||||||
| 113 | if (mask & GCLineStyle(1L<<5)) | |||||
| 114 | values.line_style = pGC->lineStyle; | |||||
| 115 | ||||||
| 116 | if (mask & GCCapStyle(1L<<6)) | |||||
| 117 | values.cap_style = pGC->capStyle; | |||||
| 118 | ||||||
| 119 | if (mask & GCJoinStyle(1L<<7)) | |||||
| 120 | values.join_style = pGC->joinStyle; | |||||
| 121 | ||||||
| 122 | if (mask & GCFillStyle(1L<<8)) | |||||
| 123 | values.fill_style = pGC->fillStyle; | |||||
| 124 | ||||||
| 125 | if (mask & GCFillRule(1L<<9)) | |||||
| 126 | values.fill_rule = pGC->fillRule; | |||||
| 127 | ||||||
| 128 | if (mask & GCTile(1L<<10)) { | |||||
| 129 | if (pGC->tileIsPixel) | |||||
| 130 | mask &= ~GCTile(1L<<10); | |||||
| 131 | else | |||||
| 132 | values.tile = xnestPixmap(pGC->tile.pixmap)(((xnestPrivPixmap *) dixLookupPrivate(&(pGC->tile.pixmap )->devPrivates, (&xnestPixmapPrivateKeyRec)))->pixmap ); | |||||
| 133 | } | |||||
| 134 | ||||||
| 135 | if (mask & GCStipple(1L<<11)) | |||||
| 136 | values.stipple = xnestPixmap(pGC->stipple)(((xnestPrivPixmap *) dixLookupPrivate(&(pGC->stipple) ->devPrivates, (&xnestPixmapPrivateKeyRec)))->pixmap ); | |||||
| 137 | ||||||
| 138 | if (mask & GCTileStipXOrigin(1L<<12)) | |||||
| 139 | values.ts_x_origin = pGC->patOrg.x; | |||||
| 140 | ||||||
| 141 | if (mask & GCTileStipYOrigin(1L<<13)) | |||||
| 142 | values.ts_y_origin = pGC->patOrg.y; | |||||
| 143 | ||||||
| 144 | if (mask & GCFont(1L<<14)) | |||||
| 145 | values.font = xnestFont(pGC->font)((((xnestPrivFont *)((xnestFontPrivateIndex) > (pGC->font )->maxPrivate ? (void *) 0 : (pGC->font)->devPrivates [xnestFontPrivateIndex]))->font_struct)->fid); | |||||
| ||||||
| 146 | ||||||
| 147 | if (mask & GCSubwindowMode(1L<<15)) | |||||
| 148 | values.subwindow_mode = pGC->subWindowMode; | |||||
| 149 | ||||||
| 150 | if (mask & GCGraphicsExposures(1L<<16)) | |||||
| 151 | values.graphics_exposures = pGC->graphicsExposures; | |||||
| 152 | ||||||
| 153 | if (mask & GCClipXOrigin(1L<<17)) | |||||
| 154 | values.clip_x_origin = pGC->clipOrg.x; | |||||
| 155 | ||||||
| 156 | if (mask & GCClipYOrigin(1L<<18)) | |||||
| 157 | values.clip_y_origin = pGC->clipOrg.y; | |||||
| 158 | ||||||
| 159 | if (mask & GCClipMask(1L<<19)) /* this is handled in change clip */ | |||||
| 160 | mask &= ~GCClipMask(1L<<19); | |||||
| 161 | ||||||
| 162 | if (mask & GCDashOffset(1L<<20)) | |||||
| 163 | values.dash_offset = pGC->dashOffset; | |||||
| 164 | ||||||
| 165 | if (mask & GCDashList(1L<<21)) { | |||||
| 166 | mask &= ~GCDashList(1L<<21); | |||||
| 167 | XSetDashes(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 168 | pGC->dashOffset, (char *) pGC->dash, pGC->numInDashList); | |||||
| 169 | } | |||||
| 170 | ||||||
| 171 | if (mask & GCArcMode(1L<<22)) | |||||
| 172 | values.arc_mode = pGC->arcMode; | |||||
| 173 | ||||||
| 174 | if (mask) | |||||
| 175 | XChangeGC(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), mask, &values); | |||||
| 176 | } | |||||
| 177 | ||||||
| 178 | void | |||||
| 179 | xnestCopyGC(GCPtr pGCSrc, unsigned long mask, GCPtr pGCDst) | |||||
| 180 | { | |||||
| 181 | XCopyGC(xnestDisplay, xnestGC(pGCSrc)(((xnestPrivGC *) dixLookupPrivate(&(pGCSrc)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), mask, xnestGC(pGCDst)(((xnestPrivGC *) dixLookupPrivate(&(pGCDst)->devPrivates , (&xnestGCPrivateKeyRec)))->gc)); | |||||
| 182 | } | |||||
| 183 | ||||||
| 184 | void | |||||
| 185 | xnestDestroyGC(GCPtr pGC) | |||||
| 186 | { | |||||
| 187 | XFreeGC(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc)); | |||||
| 188 | } | |||||
| 189 | ||||||
| 190 | void | |||||
| 191 | xnestChangeClip(GCPtr pGC, int type, void *pValue, int nRects) | |||||
| 192 | { | |||||
| 193 | int i; | |||||
| 194 | BoxPtr pBox; | |||||
| 195 | XRectangle *pRects; | |||||
| 196 | ||||||
| 197 | xnestDestroyClip(pGC); | |||||
| 198 | ||||||
| 199 | switch (type) { | |||||
| 200 | case CT_NONE0: | |||||
| 201 | XSetClipMask(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), None0L); | |||||
| 202 | pValue = NULL((void*)0); | |||||
| 203 | break; | |||||
| 204 | ||||||
| 205 | case CT_REGION2: | |||||
| 206 | nRects = RegionNumRects((RegionPtr) pValue); | |||||
| 207 | pRects = xallocarray(nRects, sizeof(*pRects))xreallocarray(((void*)0), (nRects), (sizeof(*pRects))); | |||||
| 208 | pBox = RegionRects((RegionPtr) pValue); | |||||
| 209 | for (i = nRects; i-- > 0;) { | |||||
| 210 | pRects[i].x = pBox[i].x1; | |||||
| 211 | pRects[i].y = pBox[i].y1; | |||||
| 212 | pRects[i].width = pBox[i].x2 - pBox[i].x1; | |||||
| 213 | pRects[i].height = pBox[i].y2 - pBox[i].y1; | |||||
| 214 | } | |||||
| 215 | XSetClipRectangles(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), 0, 0, | |||||
| 216 | pRects, nRects, Unsorted0); | |||||
| 217 | free((char *) pRects); | |||||
| 218 | break; | |||||
| 219 | ||||||
| 220 | case CT_PIXMAP1: | |||||
| 221 | XSetClipMask(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 222 | xnestPixmap((PixmapPtr) pValue)(((xnestPrivPixmap *) dixLookupPrivate(&((PixmapPtr) pValue )->devPrivates, (&xnestPixmapPrivateKeyRec)))->pixmap )); | |||||
| 223 | /* | |||||
| 224 | * Need to change into region, so subsequent uses are with | |||||
| 225 | * current pixmap contents. | |||||
| 226 | */ | |||||
| 227 | pGC->clientClip = (*pGC->pScreen->BitmapToRegion) ((PixmapPtr) pValue); | |||||
| 228 | (*pGC->pScreen->DestroyPixmap) ((PixmapPtr) pValue); | |||||
| 229 | pValue = pGC->clientClip; | |||||
| 230 | break; | |||||
| 231 | ||||||
| 232 | case CT_UNSORTED6: | |||||
| 233 | XSetClipRectangles(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 234 | pGC->clipOrg.x, pGC->clipOrg.y, | |||||
| 235 | (XRectangle *) pValue, nRects, Unsorted0); | |||||
| 236 | break; | |||||
| 237 | ||||||
| 238 | case CT_YSORTED10: | |||||
| 239 | XSetClipRectangles(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 240 | pGC->clipOrg.x, pGC->clipOrg.y, | |||||
| 241 | (XRectangle *) pValue, nRects, YSorted1); | |||||
| 242 | break; | |||||
| 243 | ||||||
| 244 | case CT_YXSORTED14: | |||||
| 245 | XSetClipRectangles(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 246 | pGC->clipOrg.x, pGC->clipOrg.y, | |||||
| 247 | (XRectangle *) pValue, nRects, YXSorted2); | |||||
| 248 | break; | |||||
| 249 | ||||||
| 250 | case CT_YXBANDED18: | |||||
| 251 | XSetClipRectangles(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), | |||||
| 252 | pGC->clipOrg.x, pGC->clipOrg.y, | |||||
| 253 | (XRectangle *) pValue, nRects, YXBanded3); | |||||
| 254 | break; | |||||
| 255 | } | |||||
| 256 | ||||||
| 257 | switch (type) { | |||||
| 258 | default: | |||||
| 259 | break; | |||||
| 260 | ||||||
| 261 | case CT_UNSORTED6: | |||||
| 262 | case CT_YSORTED10: | |||||
| 263 | case CT_YXSORTED14: | |||||
| 264 | case CT_YXBANDED18: | |||||
| 265 | /* server clip representation is a region */ | |||||
| 266 | pGC->clientClip = RegionFromRects(nRects, (xRectangle *) pValue, type); | |||||
| 267 | free(pValue); | |||||
| 268 | pValue = pGC->clientClip; | |||||
| 269 | break; | |||||
| 270 | } | |||||
| 271 | ||||||
| 272 | pGC->clientClip = pValue; | |||||
| 273 | } | |||||
| 274 | ||||||
| 275 | void | |||||
| 276 | xnestDestroyClip(GCPtr pGC) | |||||
| 277 | { | |||||
| 278 | if (pGC->clientClip) { | |||||
| 279 | RegionDestroy(pGC->clientClip); | |||||
| 280 | XSetClipMask(xnestDisplay, xnestGC(pGC)(((xnestPrivGC *) dixLookupPrivate(&(pGC)->devPrivates , (&xnestGCPrivateKeyRec)))->gc), None0L); | |||||
| 281 | pGC->clientClip = NULL((void*)0); | |||||
| 282 | } | |||||
| 283 | } | |||||
| 284 | ||||||
| 285 | void | |||||
| 286 | xnestCopyClip(GCPtr pGCDst, GCPtr pGCSrc) | |||||
| 287 | { | |||||
| 288 | if (pGCSrc->clientClip) { | |||||
| 289 | RegionPtr pRgn = RegionCreate(NULL((void*)0), 1); | |||||
| 290 | RegionCopy(pRgn, pGCSrc->clientClip); | |||||
| 291 | xnestChangeClip(pGCDst, CT_REGION2, pRgn, 0); | |||||
| 292 | } else { | |||||
| 293 | xnestDestroyClip(pGCDst); | |||||
| 294 | } | |||||
| 295 | } |