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a09e091a JB |
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 */ |