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a09e091a JB |
1 | /* |
2 | * Copyright © 1999 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_CONFIG_H | |
24 | #include <kdrive-config.h> | |
25 | #endif | |
26 | #include "kdrive.h" | |
27 | ||
28 | Bool | |
29 | KdShadowFbAlloc(KdScreenInfo * screen, Bool rotate) | |
30 | { | |
31 | int paddedWidth; | |
32 | void *buf; | |
33 | int width = rotate ? screen->height : screen->width; | |
34 | int height = rotate ? screen->width : screen->height; | |
35 | int bpp = screen->fb.bitsPerPixel; | |
36 | ||
37 | /* use fb computation for width */ | |
38 | paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits); | |
39 | buf = malloc(paddedWidth * height); | |
40 | if (!buf) | |
41 | return FALSE; | |
42 | if (screen->fb.shadow) | |
43 | free(screen->fb.frameBuffer); | |
44 | screen->fb.shadow = TRUE; | |
45 | screen->fb.frameBuffer = buf; | |
46 | screen->fb.byteStride = paddedWidth; | |
47 | screen->fb.pixelStride = paddedWidth * 8 / bpp; | |
48 | return TRUE; | |
49 | } | |
50 | ||
51 | void | |
52 | KdShadowFbFree(KdScreenInfo * screen) | |
53 | { | |
54 | if (screen->fb.shadow) { | |
55 | free(screen->fb.frameBuffer); | |
56 | screen->fb.frameBuffer = 0; | |
57 | screen->fb.shadow = FALSE; | |
58 | } | |
59 | } | |
60 | ||
61 | Bool | |
62 | KdShadowSet(ScreenPtr pScreen, int randr, ShadowUpdateProc update, | |
63 | ShadowWindowProc window) | |
64 | { | |
65 | KdScreenPriv(pScreen); | |
66 | KdScreenInfo *screen = pScreenPriv->screen; | |
67 | ||
68 | shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen)); | |
69 | if (screen->fb.shadow) { | |
70 | return shadowAdd(pScreen, pScreen->GetScreenPixmap(pScreen), | |
71 | update, window, randr, 0); | |
72 | } | |
73 | return TRUE; | |
74 | } | |
75 | ||
76 | void | |
77 | KdShadowUnset(ScreenPtr pScreen) | |
78 | { | |
79 | shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen)); | |
80 | } |