| 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 | #ifdef HAVE_DIX_CONFIG_H |
| 30 | #include <dix-config.h> |
| 31 | #endif |
| 32 | |
| 33 | #include "scrnintstr.h" |
| 34 | #include "gcstruct.h" |
| 35 | #include "pixmapstr.h" |
| 36 | #include "windowstr.h" |
| 37 | #include "migc.h" |
| 38 | |
| 39 | /* ARGSUSED */ |
| 40 | void |
| 41 | miChangeGC(GCPtr pGC, unsigned long mask) |
| 42 | { |
| 43 | return; |
| 44 | } |
| 45 | |
| 46 | void |
| 47 | miDestroyGC(GCPtr pGC) |
| 48 | { |
| 49 | if (pGC->pRotatedPixmap) |
| 50 | (*pGC->pScreen->DestroyPixmap) (pGC->pRotatedPixmap); |
| 51 | if (pGC->freeCompClip) |
| 52 | RegionDestroy(pGC->pCompositeClip); |
| 53 | } |
| 54 | |
| 55 | void |
| 56 | miDestroyClip(GCPtr pGC) |
| 57 | { |
| 58 | if (pGC->clientClipType == CT_NONE) |
| 59 | return; |
| 60 | else if (pGC->clientClipType == CT_PIXMAP) { |
| 61 | (*pGC->pScreen->DestroyPixmap) ((PixmapPtr) (pGC->clientClip)); |
| 62 | } |
| 63 | else { |
| 64 | /* |
| 65 | * we know we'll never have a list of rectangles, since ChangeClip |
| 66 | * immediately turns them into a region |
| 67 | */ |
| 68 | RegionDestroy(pGC->clientClip); |
| 69 | } |
| 70 | pGC->clientClip = NULL; |
| 71 | pGC->clientClipType = CT_NONE; |
| 72 | } |
| 73 | |
| 74 | void |
| 75 | miChangeClip(GCPtr pGC, int type, pointer pvalue, int nrects) |
| 76 | { |
| 77 | (*pGC->funcs->DestroyClip) (pGC); |
| 78 | if (type == CT_PIXMAP) { |
| 79 | /* convert the pixmap to a region */ |
| 80 | pGC->clientClip = (pointer) BitmapToRegion(pGC->pScreen, |
| 81 | (PixmapPtr) pvalue); |
| 82 | (*pGC->pScreen->DestroyPixmap) (pvalue); |
| 83 | } |
| 84 | else if (type == CT_REGION) { |
| 85 | /* stuff the region in the GC */ |
| 86 | pGC->clientClip = pvalue; |
| 87 | } |
| 88 | else if (type != CT_NONE) { |
| 89 | pGC->clientClip = (pointer) RegionFromRects(nrects, |
| 90 | (xRectangle *) pvalue, |
| 91 | type); |
| 92 | free(pvalue); |
| 93 | } |
| 94 | pGC->clientClipType = (type != CT_NONE && |
| 95 | pGC->clientClip) ? CT_REGION : CT_NONE; |
| 96 | pGC->stateChanges |= GCClipMask; |
| 97 | } |
| 98 | |
| 99 | void |
| 100 | miCopyClip(GCPtr pgcDst, GCPtr pgcSrc) |
| 101 | { |
| 102 | RegionPtr prgnNew; |
| 103 | |
| 104 | switch (pgcSrc->clientClipType) { |
| 105 | case CT_PIXMAP: |
| 106 | ((PixmapPtr) pgcSrc->clientClip)->refcnt++; |
| 107 | /* Fall through !! */ |
| 108 | case CT_NONE: |
| 109 | (*pgcDst->funcs->ChangeClip) (pgcDst, (int) pgcSrc->clientClipType, |
| 110 | pgcSrc->clientClip, 0); |
| 111 | break; |
| 112 | case CT_REGION: |
| 113 | prgnNew = RegionCreate(NULL, 1); |
| 114 | RegionCopy(prgnNew, (RegionPtr) (pgcSrc->clientClip)); |
| 115 | (*pgcDst->funcs->ChangeClip) (pgcDst, CT_REGION, (pointer) prgnNew, 0); |
| 116 | break; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /* ARGSUSED */ |
| 121 | void |
| 122 | miCopyGC(GCPtr pGCSrc, unsigned long changes, GCPtr pGCDst) |
| 123 | { |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | void |
| 128 | miComputeCompositeClip(GCPtr pGC, DrawablePtr pDrawable) |
| 129 | { |
| 130 | if (pDrawable->type == DRAWABLE_WINDOW) { |
| 131 | WindowPtr pWin = (WindowPtr) pDrawable; |
| 132 | RegionPtr pregWin; |
| 133 | Bool freeTmpClip, freeCompClip; |
| 134 | |
| 135 | if (pGC->subWindowMode == IncludeInferiors) { |
| 136 | pregWin = NotClippedByChildren(pWin); |
| 137 | freeTmpClip = TRUE; |
| 138 | } |
| 139 | else { |
| 140 | pregWin = &pWin->clipList; |
| 141 | freeTmpClip = FALSE; |
| 142 | } |
| 143 | freeCompClip = pGC->freeCompClip; |
| 144 | |
| 145 | /* |
| 146 | * if there is no client clip, we can get by with just keeping the |
| 147 | * pointer we got, and remembering whether or not should destroy (or |
| 148 | * maybe re-use) it later. this way, we avoid unnecessary copying of |
| 149 | * regions. (this wins especially if many clients clip by children |
| 150 | * and have no client clip.) |
| 151 | */ |
| 152 | if (pGC->clientClipType == CT_NONE) { |
| 153 | if (freeCompClip) |
| 154 | RegionDestroy(pGC->pCompositeClip); |
| 155 | pGC->pCompositeClip = pregWin; |
| 156 | pGC->freeCompClip = freeTmpClip; |
| 157 | } |
| 158 | else { |
| 159 | /* |
| 160 | * we need one 'real' region to put into the composite clip. if |
| 161 | * pregWin the current composite clip are real, we can get rid of |
| 162 | * one. if pregWin is real and the current composite clip isn't, |
| 163 | * use pregWin for the composite clip. if the current composite |
| 164 | * clip is real and pregWin isn't, use the current composite |
| 165 | * clip. if neither is real, create a new region. |
| 166 | */ |
| 167 | |
| 168 | RegionTranslate(pGC->clientClip, |
| 169 | pDrawable->x + pGC->clipOrg.x, |
| 170 | pDrawable->y + pGC->clipOrg.y); |
| 171 | |
| 172 | if (freeCompClip) { |
| 173 | RegionIntersect(pGC->pCompositeClip, pregWin, pGC->clientClip); |
| 174 | if (freeTmpClip) |
| 175 | RegionDestroy(pregWin); |
| 176 | } |
| 177 | else if (freeTmpClip) { |
| 178 | RegionIntersect(pregWin, pregWin, pGC->clientClip); |
| 179 | pGC->pCompositeClip = pregWin; |
| 180 | } |
| 181 | else { |
| 182 | pGC->pCompositeClip = RegionCreate(NullBox, 0); |
| 183 | RegionIntersect(pGC->pCompositeClip, pregWin, pGC->clientClip); |
| 184 | } |
| 185 | pGC->freeCompClip = TRUE; |
| 186 | RegionTranslate(pGC->clientClip, |
| 187 | -(pDrawable->x + pGC->clipOrg.x), |
| 188 | -(pDrawable->y + pGC->clipOrg.y)); |
| 189 | } |
| 190 | } /* end of composite clip for a window */ |
| 191 | else { |
| 192 | BoxRec pixbounds; |
| 193 | |
| 194 | /* XXX should we translate by drawable.x/y here ? */ |
| 195 | /* If you want pixmaps in offscreen memory, yes */ |
| 196 | pixbounds.x1 = pDrawable->x; |
| 197 | pixbounds.y1 = pDrawable->y; |
| 198 | pixbounds.x2 = pDrawable->x + pDrawable->width; |
| 199 | pixbounds.y2 = pDrawable->y + pDrawable->height; |
| 200 | |
| 201 | if (pGC->freeCompClip) { |
| 202 | RegionReset(pGC->pCompositeClip, &pixbounds); |
| 203 | } |
| 204 | else { |
| 205 | pGC->freeCompClip = TRUE; |
| 206 | pGC->pCompositeClip = RegionCreate(&pixbounds, 1); |
| 207 | } |
| 208 | |
| 209 | if (pGC->clientClipType == CT_REGION) { |
| 210 | if (pDrawable->x || pDrawable->y) { |
| 211 | RegionTranslate(pGC->clientClip, |
| 212 | pDrawable->x + pGC->clipOrg.x, |
| 213 | pDrawable->y + pGC->clipOrg.y); |
| 214 | RegionIntersect(pGC->pCompositeClip, |
| 215 | pGC->pCompositeClip, pGC->clientClip); |
| 216 | RegionTranslate(pGC->clientClip, |
| 217 | -(pDrawable->x + pGC->clipOrg.x), |
| 218 | -(pDrawable->y + pGC->clipOrg.y)); |
| 219 | } |
| 220 | else { |
| 221 | RegionTranslate(pGC->pCompositeClip, |
| 222 | -pGC->clipOrg.x, -pGC->clipOrg.y); |
| 223 | RegionIntersect(pGC->pCompositeClip, |
| 224 | pGC->pCompositeClip, pGC->clientClip); |
| 225 | RegionTranslate(pGC->pCompositeClip, |
| 226 | pGC->clipOrg.x, pGC->clipOrg.y); |
| 227 | } |
| 228 | } |
| 229 | } /* end of composite clip for pixmap */ |
| 230 | } /* end miComputeCompositeClip */ |