File: | fb/fbarc.c |
Location: | line 130, column 17 |
Description: | Value stored to 'wrapped' is never read |
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_H1 |
24 | #include <dix-config.h> |
25 | #endif |
26 | |
27 | #include "fb.h" |
28 | #include "mizerarc.h" |
29 | #include <limits.h> |
30 | |
31 | typedef void (*FbArc) (FbBits * dst, |
32 | FbStride dstStride, |
33 | int dstBpp, |
34 | xArc * arc, int dx, int dy, FbBits and, FbBits xor); |
35 | |
36 | void |
37 | fbPolyArcwfbPolyArc(DrawablePtr pDrawable, GCPtr pGC, int narcs, xArc * parcs) |
38 | { |
39 | FbArc arc; |
40 | |
41 | if (pGC->lineWidth == 0) { |
42 | arc = 0; |
43 | if (pGC->lineStyle == LineSolid0 && pGC->fillStyle == FillSolid0) { |
44 | switch (pDrawable->bitsPerPixel) { |
45 | case 8: |
46 | arc = fbArc8wfbArc8; |
47 | break; |
48 | case 16: |
49 | arc = fbArc16wfbArc16; |
50 | break; |
51 | case 24: |
52 | arc = fbArc24wfbArc24; |
53 | break; |
54 | case 32: |
55 | arc = fbArc32wfbArc32; |
56 | break; |
57 | } |
58 | } |
59 | if (arc) { |
60 | FbGCPrivPtr pPriv = fbGetGCPrivate(pGC)((FbGCPrivPtr) dixLookupPrivate(&(pGC)->devPrivates, ( &((FbScreenPrivPtr) dixLookupPrivate(&((pGC)->pScreen )->devPrivates, wfbGetScreenPrivateKey()))->gcPrivateKeyRec ))); |
61 | FbBits *dst; |
62 | FbStride dstStride; |
63 | int dstBpp; |
64 | int dstXoff, dstYoff; |
65 | BoxRec box; |
66 | int x2, y2; |
67 | RegionPtr cclip; |
68 | |
69 | #ifdef FB_ACCESS_WRAPPER1 |
70 | int wrapped = 1; |
71 | #endif |
72 | |
73 | cclip = fbGetCompositeClip(pGC)((pGC)->pCompositeClip); |
74 | fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff){ PixmapPtr _pPix; { if ((pDrawable)->type != 1) { (_pPix) = ((PixmapPtr) dixLookupPrivate(&((WindowPtr)(pDrawable) )->devPrivates, (&((FbScreenPrivPtr) dixLookupPrivate( &(((DrawablePtr) (pDrawable))->pScreen)->devPrivates , wfbGetScreenPrivateKey()))->winPrivateKeyRec))); (dstXoff ) = (((_pPix)->drawable.x) - (_pPix)->screen_x); (dstYoff ) = (((_pPix)->drawable.y) - (_pPix)->screen_y); } else { (_pPix) = (PixmapPtr) (pDrawable); (dstXoff) = (((_pPix)-> drawable.x)); (dstYoff) = (((_pPix)->drawable.y)); } ((FbScreenPrivPtr ) dixLookupPrivate(&((pDrawable)->pScreen)->devPrivates , wfbGetScreenPrivateKey()))->setupWrap( &wfbReadMemory , &wfbWriteMemory, (pDrawable)); }; { (dst) = (FbBits *) ( _pPix)->devPrivate.ptr; (dstStride) = ((int) (_pPix)->devKind ) / sizeof (FbBits); (void)(dstStride); (dstBpp) = (_pPix)-> drawable.bitsPerPixel; (void)(dstBpp); }; }; |
75 | while (narcs--) { |
76 | if (miCanZeroArc(parcs)(((parcs)->width == (parcs)->height) || (((parcs)->width <= 800) && ((parcs)->height <= 800)))) { |
77 | box.x1 = parcs->x + pDrawable->x; |
78 | box.y1 = parcs->y + pDrawable->y; |
79 | /* |
80 | * Because box.x2 and box.y2 get truncated to 16 bits, and the |
81 | * RECT_IN_REGION test treats the resulting number as a signed |
82 | * integer, the RECT_IN_REGION test alone can go the wrong way. |
83 | * This can result in a server crash because the rendering |
84 | * routines in this file deal directly with cpu addresses |
85 | * of pixels to be stored, and do not clip or otherwise check |
86 | * that all such addresses are within their respective pixmaps. |
87 | * So we only allow the RECT_IN_REGION test to be used for |
88 | * values that can be expressed correctly in a signed short. |
89 | */ |
90 | x2 = box.x1 + (int) parcs->width + 1; |
91 | box.x2 = x2; |
92 | y2 = box.y1 + (int) parcs->height + 1; |
93 | box.y2 = y2; |
94 | if ((x2 <= SHRT_MAX32767) && (y2 <= SHRT_MAX32767) && |
95 | (RegionContainsRect(cclip, &box) == rgnIN1)) { |
96 | #ifdef FB_ACCESS_WRAPPER1 |
97 | if (!wrapped) { |
98 | fbPrepareAccess(pDrawable)((FbScreenPrivPtr) dixLookupPrivate(&((pDrawable)->pScreen )->devPrivates, wfbGetScreenPrivateKey()))->setupWrap( & wfbReadMemory, &wfbWriteMemory, (pDrawable)); |
99 | wrapped = 1; |
100 | } |
101 | #endif |
102 | (*arc) (dst, dstStride, dstBpp, |
103 | parcs, pDrawable->x + dstXoff, |
104 | pDrawable->y + dstYoff, pPriv->and, pPriv->xor); |
105 | } |
106 | else { |
107 | #ifdef FB_ACCESS_WRAPPER1 |
108 | if (wrapped) { |
109 | fbFinishAccess(pDrawable)((FbScreenPrivPtr) dixLookupPrivate(&((pDrawable)->pScreen )->devPrivates, wfbGetScreenPrivateKey()))->finishWrap( pDrawable); |
110 | wrapped = 0; |
111 | } |
112 | #endif |
113 | miZeroPolyArc(pDrawable, pGC, 1, parcs); |
114 | } |
115 | } |
116 | else { |
117 | #ifdef FB_ACCESS_WRAPPER1 |
118 | if (wrapped) { |
119 | fbFinishAccess(pDrawable)((FbScreenPrivPtr) dixLookupPrivate(&((pDrawable)->pScreen )->devPrivates, wfbGetScreenPrivateKey()))->finishWrap( pDrawable); |
120 | wrapped = 0; |
121 | } |
122 | #endif |
123 | miPolyArc(pDrawable, pGC, 1, parcs); |
124 | } |
125 | parcs++; |
126 | } |
127 | #ifdef FB_ACCESS_WRAPPER1 |
128 | if (wrapped) { |
129 | fbFinishAccess(pDrawable)((FbScreenPrivPtr) dixLookupPrivate(&((pDrawable)->pScreen )->devPrivates, wfbGetScreenPrivateKey()))->finishWrap( pDrawable); |
130 | wrapped = 0; |
Value stored to 'wrapped' is never read | |
131 | } |
132 | #endif |
133 | } |
134 | else |
135 | miZeroPolyArc(pDrawable, pGC, narcs, parcs); |
136 | } |
137 | else |
138 | miPolyArc(pDrawable, pGC, narcs, parcs); |
139 | } |