micopy.c (9895B)
1 /* 2 * Copyright © 1998 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_H 24 #include <dix-config.h> 25 #endif 26 27 #include "mi.h" 28 #include "scrnintstr.h" 29 #include "gcstruct.h" 30 #include "pixmap.h" 31 #include "pixmapstr.h" 32 #include "windowstr.h" 33 34 void 35 miCopyRegion(DrawablePtr pSrcDrawable, 36 DrawablePtr pDstDrawable, 37 GCPtr pGC, 38 RegionPtr pDstRegion, 39 int dx, int dy, miCopyProc copyProc, Pixel bitPlane, void *closure) 40 { 41 int careful; 42 Bool reverse; 43 Bool upsidedown; 44 BoxPtr pbox; 45 int nbox; 46 BoxPtr pboxNew1, pboxNew2, pboxBase, pboxNext, pboxTmp; 47 48 pbox = RegionRects(pDstRegion); 49 nbox = RegionNumRects(pDstRegion); 50 51 /* XXX we have to err on the side of safety when both are windows, 52 * because we don't know if IncludeInferiors is being used. 53 */ 54 careful = ((pSrcDrawable == pDstDrawable) || 55 ((pSrcDrawable->type == DRAWABLE_WINDOW) && 56 (pDstDrawable->type == DRAWABLE_WINDOW))); 57 58 pboxNew1 = NULL; 59 pboxNew2 = NULL; 60 if (careful && dy < 0) { 61 upsidedown = TRUE; 62 63 if (nbox > 1) { 64 /* keep ordering in each band, reverse order of bands */ 65 pboxNew1 = xallocarray(nbox, sizeof(BoxRec)); 66 if (!pboxNew1) 67 return; 68 pboxBase = pboxNext = pbox + nbox - 1; 69 while (pboxBase >= pbox) { 70 while ((pboxNext >= pbox) && (pboxBase->y1 == pboxNext->y1)) 71 pboxNext--; 72 pboxTmp = pboxNext + 1; 73 while (pboxTmp <= pboxBase) { 74 *pboxNew1++ = *pboxTmp++; 75 } 76 pboxBase = pboxNext; 77 } 78 pboxNew1 -= nbox; 79 pbox = pboxNew1; 80 } 81 } 82 else { 83 /* walk source top to bottom */ 84 upsidedown = FALSE; 85 } 86 87 if (careful && dx < 0) { 88 /* walk source right to left */ 89 if (dy <= 0) 90 reverse = TRUE; 91 else 92 reverse = FALSE; 93 94 if (nbox > 1) { 95 /* reverse order of rects in each band */ 96 pboxNew2 = xallocarray(nbox, sizeof(BoxRec)); 97 if (!pboxNew2) { 98 free(pboxNew1); 99 return; 100 } 101 pboxBase = pboxNext = pbox; 102 while (pboxBase < pbox + nbox) { 103 while ((pboxNext < pbox + nbox) && 104 (pboxNext->y1 == pboxBase->y1)) 105 pboxNext++; 106 pboxTmp = pboxNext; 107 while (pboxTmp != pboxBase) { 108 *pboxNew2++ = *--pboxTmp; 109 } 110 pboxBase = pboxNext; 111 } 112 pboxNew2 -= nbox; 113 pbox = pboxNew2; 114 } 115 } 116 else { 117 /* walk source left to right */ 118 reverse = FALSE; 119 } 120 121 (*copyProc) (pSrcDrawable, 122 pDstDrawable, 123 pGC, 124 pbox, nbox, dx, dy, reverse, upsidedown, bitPlane, closure); 125 126 free(pboxNew1); 127 free(pboxNew2); 128 } 129 130 RegionPtr 131 miDoCopy(DrawablePtr pSrcDrawable, 132 DrawablePtr pDstDrawable, 133 GCPtr pGC, 134 int xIn, 135 int yIn, 136 int widthSrc, 137 int heightSrc, 138 int xOut, int yOut, miCopyProc copyProc, Pixel bitPlane, void *closure) 139 { 140 RegionPtr prgnSrcClip = NULL; /* may be a new region, or just a copy */ 141 Bool freeSrcClip = FALSE; 142 RegionPtr prgnExposed = NULL; 143 RegionRec rgnDst; 144 int dx; 145 int dy; 146 int numRects; 147 int box_x1; 148 int box_y1; 149 int box_x2; 150 int box_y2; 151 Bool fastSrc = FALSE; /* for fast clipping with pixmap source */ 152 Bool fastDst = FALSE; /* for fast clipping with one rect dest */ 153 Bool fastExpose = FALSE; /* for fast exposures with pixmap source */ 154 155 /* Short cut for unmapped windows */ 156 157 if (pDstDrawable->type == DRAWABLE_WINDOW && 158 !((WindowPtr) pDstDrawable)->realized) { 159 return NULL; 160 } 161 162 (*pSrcDrawable->pScreen->SourceValidate) (pSrcDrawable, xIn, yIn, 163 widthSrc, heightSrc, 164 pGC->subWindowMode); 165 166 /* Compute source clip region */ 167 if (pSrcDrawable->type == DRAWABLE_PIXMAP) { 168 if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip)) 169 prgnSrcClip = miGetCompositeClip(pGC); 170 else 171 fastSrc = TRUE; 172 } 173 else { 174 if (pGC->subWindowMode == IncludeInferiors) { 175 /* 176 * XFree86 DDX empties the border clip when the 177 * VT is inactive, make sure the region isn't empty 178 */ 179 if (!((WindowPtr) pSrcDrawable)->parent && 180 RegionNotEmpty(&((WindowPtr) pSrcDrawable)->borderClip)) { 181 /* 182 * special case bitblt from root window in 183 * IncludeInferiors mode; just like from a pixmap 184 */ 185 fastSrc = TRUE; 186 } 187 else if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip)) { 188 prgnSrcClip = miGetCompositeClip(pGC); 189 } 190 else { 191 prgnSrcClip = NotClippedByChildren((WindowPtr) pSrcDrawable); 192 freeSrcClip = TRUE; 193 } 194 } 195 else { 196 prgnSrcClip = &((WindowPtr) pSrcDrawable)->clipList; 197 } 198 } 199 200 xIn += pSrcDrawable->x; 201 yIn += pSrcDrawable->y; 202 203 xOut += pDstDrawable->x; 204 yOut += pDstDrawable->y; 205 206 box_x1 = xIn; 207 box_y1 = yIn; 208 box_x2 = xIn + widthSrc; 209 box_y2 = yIn + heightSrc; 210 211 dx = xIn - xOut; 212 dy = yIn - yOut; 213 214 /* Don't create a source region if we are doing a fast clip */ 215 if (fastSrc) { 216 RegionPtr cclip; 217 218 fastExpose = TRUE; 219 /* 220 * clip the source; if regions extend beyond the source size, 221 * make sure exposure events get sent 222 */ 223 if (box_x1 < pSrcDrawable->x) { 224 box_x1 = pSrcDrawable->x; 225 fastExpose = FALSE; 226 } 227 if (box_y1 < pSrcDrawable->y) { 228 box_y1 = pSrcDrawable->y; 229 fastExpose = FALSE; 230 } 231 if (box_x2 > pSrcDrawable->x + (int) pSrcDrawable->width) { 232 box_x2 = pSrcDrawable->x + (int) pSrcDrawable->width; 233 fastExpose = FALSE; 234 } 235 if (box_y2 > pSrcDrawable->y + (int) pSrcDrawable->height) { 236 box_y2 = pSrcDrawable->y + (int) pSrcDrawable->height; 237 fastExpose = FALSE; 238 } 239 240 /* Translate and clip the dst to the destination composite clip */ 241 box_x1 -= dx; 242 box_x2 -= dx; 243 box_y1 -= dy; 244 box_y2 -= dy; 245 246 /* If the destination composite clip is one rectangle we can 247 do the clip directly. Otherwise we have to create a full 248 blown region and call intersect */ 249 250 cclip = miGetCompositeClip(pGC); 251 if (RegionNumRects(cclip) == 1) { 252 BoxPtr pBox = RegionRects(cclip); 253 254 if (box_x1 < pBox->x1) 255 box_x1 = pBox->x1; 256 if (box_x2 > pBox->x2) 257 box_x2 = pBox->x2; 258 if (box_y1 < pBox->y1) 259 box_y1 = pBox->y1; 260 if (box_y2 > pBox->y2) 261 box_y2 = pBox->y2; 262 fastDst = TRUE; 263 } 264 } 265 266 /* Check to see if the region is empty */ 267 if (box_x1 >= box_x2 || box_y1 >= box_y2) { 268 RegionNull(&rgnDst); 269 } 270 else { 271 BoxRec box; 272 273 box.x1 = box_x1; 274 box.y1 = box_y1; 275 box.x2 = box_x2; 276 box.y2 = box_y2; 277 RegionInit(&rgnDst, &box, 1); 278 } 279 280 /* Clip against complex source if needed */ 281 if (!fastSrc) { 282 RegionIntersect(&rgnDst, &rgnDst, prgnSrcClip); 283 RegionTranslate(&rgnDst, -dx, -dy); 284 } 285 286 /* Clip against complex dest if needed */ 287 if (!fastDst) { 288 RegionIntersect(&rgnDst, &rgnDst, miGetCompositeClip(pGC)); 289 } 290 291 /* Do bit blitting */ 292 numRects = RegionNumRects(&rgnDst); 293 if (numRects && widthSrc && heightSrc) 294 miCopyRegion(pSrcDrawable, pDstDrawable, pGC, 295 &rgnDst, dx, dy, copyProc, bitPlane, closure); 296 297 /* Pixmap sources generate a NoExposed (we return NULL to do this) */ 298 if (!fastExpose && pGC->fExpose) 299 prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC, 300 xIn - pSrcDrawable->x, 301 yIn - pSrcDrawable->y, 302 widthSrc, heightSrc, 303 xOut - pDstDrawable->x, 304 yOut - pDstDrawable->y); 305 RegionUninit(&rgnDst); 306 if (freeSrcClip) 307 RegionDestroy(prgnSrcClip); 308 return prgnExposed; 309 }