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_DIX_CONFIG_H
24 #include <dix-config.h>
25 #endif
26 #include "kdrive.h"
27
28 Bool
KdShadowFbAlloc(KdScreenInfo * screen,Bool rotate)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 = xallocarray(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
KdShadowFbFree(KdScreenInfo * screen)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
KdShadowSet(ScreenPtr pScreen,int randr,ShadowUpdateProc update,ShadowWindowProc window)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
KdShadowUnset(ScreenPtr pScreen)77 KdShadowUnset(ScreenPtr pScreen)
78 {
79 shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
80 }
81