| 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 | } |