diff options
Diffstat (limited to 'xorg-server/miext/shadow/shplanar8.c')
| -rw-r--r-- | xorg-server/miext/shadow/shplanar8.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/xorg-server/miext/shadow/shplanar8.c b/xorg-server/miext/shadow/shplanar8.c new file mode 100644 index 000000000..6d8defa58 --- /dev/null +++ b/xorg-server/miext/shadow/shplanar8.c @@ -0,0 +1,175 @@ +/* + * + * Copyright © 2000 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Keith Packard not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Keith Packard makes no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <stdlib.h> + +#include <X11/X.h> +#include "scrnintstr.h" +#include "windowstr.h" +#include <X11/fonts/font.h> +#include "dixfontstr.h" +#include <X11/fonts/fontstruct.h> +#include "mi.h" +#include "regionstr.h" +#include "globals.h" +#include "gcstruct.h" +#include "shadow.h" +#include "fb.h" + +/* + * Expose 8bpp depth 4 + */ + +/* + * 32->8 conversion: + * + * 7 6 5 4 3 2 1 0 + * A B C D E F G H + * + * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * m1 D x x x x x x x C x x x x x x x B x x x x x x x A x x x x x x x sha[0] << (7-(p)) + * m2 x x x x H x x x x x x x G x x x x x x x F x x x x x x x E x x x sha[1] << (3-(p)) + * m3 D C B A m1 & 0x80808080 + * m4 H G F E m2 & 0x08080808 + * m5 D H C G B F A E m3 | m4 + * m6 D H C G B F m5 >> 9 + * m7 D H C D G H B C F G A B E F m5 | m6 + * m8 D H C D G H m7 >> 18 + * m9 D H C D G H B C D F G H A B C D E F G H m7 | m8 + */ + +#define PL_SHIFT 8 +#define PL_UNIT (1 << PL_SHIFT) +#define PL_MASK (PL_UNIT - 1) + +#if 0 +#define GetBits(p,o,d) { \ + CARD32 m1,m2,m3,m4,m5,m6,m7,m8; \ + m1 = sha[o] << (7 - (p)); \ + m2 = sha[(o)+1] << (3 - (p)); \ + m3 = m1 & 0x80808080; \ + m4 = m2 & 0x08080808; \ + m5 = m3 | m4; \ + m6 = m5 >> 9; \ + m7 = m5 | m6; \ + m8 = m7 >> 18; \ + d = m7 | m8; \ +} +#else +#define GetBits(p,o,d) { \ + CARD32 m5,m7; \ + m5 = ((sha[o] << (7 - (p))) & 0x80808080) | ((sha[(o)+1] << (3 - (p))) & 0x08080808); \ + m7 = m5 | (m5 >> 9); \ + d = m7 | (m7 >> 18); \ +} +#endif + +void +shadowUpdatePlanar4x8 (ScreenPtr pScreen, + shadowBufPtr pBuf) +{ + RegionPtr damage = shadowDamage (pBuf); + PixmapPtr pShadow = pBuf->pPixmap; + int nbox = REGION_NUM_RECTS (damage); + BoxPtr pbox = REGION_RECTS (damage); + CARD32 *shaBase, *shaLine, *sha; + CARD8 s1, s2, s3, s4; + FbStride shaStride; + int scrBase, scrLine, scr; + int shaBpp; + int shaXoff, shaYoff; /* XXX assumed to be zero */ + int x, y, w, h, width; + int i; + CARD32 *winBase = NULL, *win; + CARD32 winSize; + int plane; + + fbGetStipDrawable (&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, shaYoff); + while (nbox--) + { + x = pbox->x1 * shaBpp; + y = pbox->y1; + w = (pbox->x2 - pbox->x1) * shaBpp; + h = pbox->y2 - pbox->y1; + + w = (w + (x & PL_MASK) + PL_MASK) >> PL_SHIFT; + x &= ~PL_MASK; + + scrLine = (x >> PL_SHIFT); + shaLine = shaBase + y * shaStride + (x >> FB_SHIFT); + + while (h--) + { + for (plane = 0; plane < 4; plane++) + { + width = w; + scr = scrLine; + sha = shaLine; + winSize = 0; + scrBase = 0; + while (width) { + /* how much remains in this window */ + i = scrBase + winSize - scr; + if (i <= 0 || scr < scrBase) + { + winBase = (CARD32 *) (*pBuf->window) (pScreen, + y, + (scr << 4) | (plane), + SHADOW_WINDOW_WRITE, + &winSize, + pBuf->closure); + if(!winBase) + return; + winSize >>= 2; + scrBase = scr; + i = winSize; + } + win = winBase + (scr - scrBase); + if (i > width) + i = width; + width -= i; + scr += i; + + while (i--) + { + GetBits(plane,0,s1); + GetBits(plane,2,s2); + GetBits(plane,4,s3); + GetBits(plane,6,s4); + *win++ = s1 | (s2 << 8) | (s3 << 16) | (s4 << 24); + sha += 8; + } + } + } + shaLine += shaStride; + y++; + } + pbox++; + } +} + |