xorg-server-1.4/mi/migc.c

   1 /*
   2
   3 Copyright 1993, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included
  12 in all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  17 IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 OTHER DEALINGS IN THE SOFTWARE.
  21
  22 Except as contained in this notice, the name of The Open Group shall
  23 not be used in advertising or otherwise to promote the sale, use or
  24 other dealings in this Software without prior written authorization
  25 from The Open Group.
  26
  27 */
  28
  29
  30 #ifdef HAVE_DIX_CONFIG_H
  31 #include <dix-config.h>
  32 #endif
  33
  34 #include "scrnintstr.h"
  35 #include "gcstruct.h"
  36 #include "pixmapstr.h"
  37 #include "windowstr.h"
  38 #include "migc.h"
  39
  40 /* ARGSUSED */
  41 _X_EXPORT void
  42 miChangeGC(pGC, mask)
  43     GCPtr           pGC;
  44     unsigned long   mask;
  45 {
  46     return;
  47 }
  48
  49 _X_EXPORT void
  50 miDestroyGC(pGC)
  51     GCPtr           pGC;
  52 {
  53     if (pGC->pRotatedPixmap)
  54         (*pGC->pScreen->DestroyPixmap) (pGC->pRotatedPixmap);
  55     if (pGC->freeCompClip)
  56         REGION_DESTROY(pGC->pScreen, pGC->pCompositeClip);
  57     miDestroyGCOps(pGC->ops);
  58 }
  59
  60 /*
  61  * create a private op array for a gc
  62  */
  63
  64 _X_EXPORT GCOpsPtr
  65 miCreateGCOps(prototype)
  66     GCOpsPtr        prototype;
  67 {
  68     GCOpsPtr        ret;
  69
  70      /* XXX */ Must_have_memory = TRUE;
  71     ret = (GCOpsPtr) xalloc(sizeof(GCOps));
  72      /* XXX */ Must_have_memory = FALSE;
  73     if (!ret)
  74         return 0;
  75     *ret = *prototype;
  76     ret->devPrivate.val = 1;
  77     return ret;
  78 }
  79
  80 _X_EXPORT void
  81 miDestroyGCOps(ops)
  82     GCOpsPtr        ops;
  83 {
  84     if (ops->devPrivate.val)
  85         xfree(ops);
  86 }
  87
  88
  89 _X_EXPORT void
  90 miDestroyClip(pGC)
  91     GCPtr           pGC;
  92 {
  93     if (pGC->clientClipType == CT_NONE)
  94         return;
  95     else if (pGC->clientClipType == CT_PIXMAP)
  96     {
  97         (*pGC->pScreen->DestroyPixmap) ((PixmapPtr) (pGC->clientClip));
  98     }
  99     else
 100     {
 101         /*
 102          * we know we'll never have a list of rectangles, since ChangeClip
 103          * immediately turns them into a region
 104          */
 105         REGION_DESTROY(pGC->pScreen, pGC->clientClip);
 106     }
 107     pGC->clientClip = NULL;
 108     pGC->clientClipType = CT_NONE;
 109 }
 110
 111 _X_EXPORT void
 112 miChangeClip(pGC, type, pvalue, nrects)
 113     GCPtr           pGC;
 114     int             type;
 115     pointer         pvalue;
 116     int             nrects;
 117 {
 118     (*pGC->funcs->DestroyClip) (pGC);
 119     if (type == CT_PIXMAP)
 120     {
 121         /* convert the pixmap to a region */
 122         pGC->clientClip = (pointer) BITMAP_TO_REGION(pGC->pScreen,
 123                                                         (PixmapPtr) pvalue);
 124         (*pGC->pScreen->DestroyPixmap) (pvalue);
 125     }
 126     else if (type == CT_REGION)
 127     {
 128         /* stuff the region in the GC */
 129         pGC->clientClip = pvalue;
 130     }
 131     else if (type != CT_NONE)
 132     {
 133         pGC->clientClip = (pointer) RECTS_TO_REGION(pGC->pScreen, nrects,
 134                                                       (xRectangle *) pvalue,
 135                                                                     type);
 136         xfree(pvalue);
 137     }
 138     pGC->clientClipType = (type != CT_NONE && pGC->clientClip) ? CT_REGION : CT_NONE;
 139     pGC->stateChanges |= GCClipMask;
 140 }
 141
 142 _X_EXPORT void
 143 miCopyClip(pgcDst, pgcSrc)
 144     GCPtr           pgcDst, pgcSrc;
 145 {
 146     RegionPtr       prgnNew;
 147
 148     switch (pgcSrc->clientClipType)
 149     {
 150       case CT_PIXMAP:
 151         ((PixmapPtr) pgcSrc->clientClip)->refcnt++;
 152         /* Fall through !! */
 153       case CT_NONE:
 154         (*pgcDst->funcs->ChangeClip) (pgcDst, (int) pgcSrc->clientClipType,
 155                                    pgcSrc->clientClip, 0);
 156         break;
 157       case CT_REGION:
 158         prgnNew = REGION_CREATE(pgcSrc->pScreen, NULL, 1);
 159         REGION_COPY(pgcDst->pScreen, prgnNew,
 160                                         (RegionPtr) (pgcSrc->clientClip));
 161         (*pgcDst->funcs->ChangeClip) (pgcDst, CT_REGION, (pointer) prgnNew, 0);
 162         break;
 163     }
 164 }
 165
 166 /* ARGSUSED */
 167 _X_EXPORT void
 168 miCopyGC(pGCSrc, changes, pGCDst)
 169     GCPtr           pGCSrc;
 170     unsigned long   changes;
 171     GCPtr           pGCDst;
 172 {
 173     return;
 174 }
 175
 176 _X_EXPORT void
 177 miComputeCompositeClip(pGC, pDrawable)
 178     GCPtr           pGC;
 179     DrawablePtr     pDrawable;
 180 {
 181     ScreenPtr       pScreen;
 182
 183     /* This prevents warnings about pScreen not being used. */
 184     pGC->pScreen = pScreen = pGC->pScreen;
 185
 186     if (pDrawable->type == DRAWABLE_WINDOW)
 187     {
 188         WindowPtr       pWin = (WindowPtr) pDrawable;
 189         RegionPtr       pregWin;
 190         Bool            freeTmpClip, freeCompClip;
 191
 192         if (pGC->subWindowMode == IncludeInferiors)
 193         {
 194             pregWin = NotClippedByChildren(pWin);
 195             freeTmpClip = TRUE;
 196         }
 197         else
 198         {
 199             pregWin = &pWin->clipList;
 200             freeTmpClip = FALSE;
 201         }
 202         freeCompClip = pGC->freeCompClip;
 203
 204         /*
 205          * if there is no client clip, we can get by with just keeping the
 206          * pointer we got, and remembering whether or not should destroy (or
 207          * maybe re-use) it later.  this way, we avoid unnecessary copying of
 208          * regions.  (this wins especially if many clients clip by children
 209          * and have no client clip.)
 210          */
 211         if (pGC->clientClipType == CT_NONE)
 212         {
 213             if (freeCompClip)
 214                 REGION_DESTROY(pScreen, pGC->pCompositeClip);
 215             pGC->pCompositeClip = pregWin;
 216             pGC->freeCompClip = freeTmpClip;
 217         }
 218         else
 219         {
 220             /*
 221              * we need one 'real' region to put into the composite clip. if
 222              * pregWin the current composite clip are real, we can get rid of
 223              * one. if pregWin is real and the current composite clip isn't,
 224              * use pregWin for the composite clip. if the current composite
 225              * clip is real and pregWin isn't, use the current composite
 226              * clip. if neither is real, create a new region.
 227              */
 228
 229             REGION_TRANSLATE(pScreen, pGC->clientClip,
 230                                          pDrawable->x + pGC->clipOrg.x,
 231                                          pDrawable->y + pGC->clipOrg.y);
 232
 233             if (freeCompClip)
 234             {
 235                 REGION_INTERSECT(pGC->pScreen, pGC->pCompositeClip,
 236                                             pregWin, pGC->clientClip);
 237                 if (freeTmpClip)
 238                     REGION_DESTROY(pScreen, pregWin);
 239             }
 240             else if (freeTmpClip)
 241             {
 242                 REGION_INTERSECT(pScreen, pregWin, pregWin, pGC->clientClip);
 243                 pGC->pCompositeClip = pregWin;
 244             }
 245             else
 246             {
 247                 pGC->pCompositeClip = REGION_CREATE(pScreen, NullBox, 0);
 248                 REGION_INTERSECT(pScreen, pGC->pCompositeClip,
 249                                        pregWin, pGC->clientClip);
 250             }
 251             pGC->freeCompClip = TRUE;
 252             REGION_TRANSLATE(pScreen, pGC->clientClip,
 253                                          -(pDrawable->x + pGC->clipOrg.x),
 254                                          -(pDrawable->y + pGC->clipOrg.y));
 255         }
 256     }   /* end of composite clip for a window */
 257     else
 258     {
 259         BoxRec          pixbounds;
 260
 261         /* XXX should we translate by drawable.x/y here ? */
 262         /* If you want pixmaps in offscreen memory, yes */
 263         pixbounds.x1 = pDrawable->x;
 264         pixbounds.y1 = pDrawable->y;
 265         pixbounds.x2 = pDrawable->x + pDrawable->width;
 266         pixbounds.y2 = pDrawable->y + pDrawable->height;
 267
 268         if (pGC->freeCompClip)
 269         {
 270             REGION_RESET(pScreen, pGC->pCompositeClip, &pixbounds);
 271         }
 272         else
 273         {
 274             pGC->freeCompClip = TRUE;
 275             pGC->pCompositeClip = REGION_CREATE(pScreen, &pixbounds, 1);
 276         }
 277
 278         if (pGC->clientClipType == CT_REGION)
 279         {
 280             if(pDrawable->x || pDrawable->y) {
 281                 REGION_TRANSLATE(pScreen, pGC->clientClip,
 282                                           pDrawable->x + pGC->clipOrg.x,
 283                                           pDrawable->y + pGC->clipOrg.y);
 284                 REGION_INTERSECT(pScreen, pGC->pCompositeClip,
 285                                 pGC->pCompositeClip, pGC->clientClip);
 286                 REGION_TRANSLATE(pScreen, pGC->clientClip,
 287                                           -(pDrawable->x + pGC->clipOrg.x),
 288                                           -(pDrawable->y + pGC->clipOrg.y));
 289             } else {
 290                 REGION_TRANSLATE(pScreen, pGC->pCompositeClip,
 291                                          -pGC->clipOrg.x, -pGC->clipOrg.y);
 292                 REGION_INTERSECT(pScreen, pGC->pCompositeClip,
 293                                 pGC->pCompositeClip, pGC->clientClip);
 294                 REGION_TRANSLATE(pScreen, pGC->pCompositeClip,
 295                                          pGC->clipOrg.x, pGC->clipOrg.y);
 296             }
 297         }
 298     }   /* end of composite clip for pixmap */
 299 } /* end miComputeCompositeClip */