From d7181e567d1629c387b834da7eecdf618d14718e Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 10 Mar 2013 17:16:17 +0100 Subject: Shadow: Add support for Atari iplan2p8 Add support for Atari-style interleaved bitplanes, with 2 bytes interleave and 8 bits per pixel. Signed-off-by: Geert Uytterhoeven Acked-by: Keith Packard --- miext/shadow/Makefile.am | 1 + miext/shadow/shadow.h | 3 + miext/shadow/shiplan2p8.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 141 insertions(+) create mode 100644 miext/shadow/shiplan2p8.c (limited to 'miext') diff --git a/miext/shadow/Makefile.am b/miext/shadow/Makefile.am index adb10bfd4..882463e58 100644 --- a/miext/shadow/Makefile.am +++ b/miext/shadow/Makefile.am @@ -11,6 +11,7 @@ libshadow_la_SOURCES = \ shadow.h \ shalloc.c \ shiplan2p4.c \ + shiplan2p8.c \ shpacked.c \ shplanar8.c \ shplanar.c \ diff --git a/miext/shadow/shadow.h b/miext/shadow/shadow.h index d62903cb7..e190cd48f 100644 --- a/miext/shadow/shadow.h +++ b/miext/shadow/shadow.h @@ -98,6 +98,9 @@ extern _X_EXPORT void *shadowAlloc(int width, int height, int bpp); extern _X_EXPORT void shadowUpdateIplan2p4(ScreenPtr pScreen, shadowBufPtr pBuf); +extern _X_EXPORT void + shadowUpdateIplan2p8(ScreenPtr pScreen, shadowBufPtr pBuf); + extern _X_EXPORT void shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf); diff --git a/miext/shadow/shiplan2p8.c b/miext/shadow/shiplan2p8.c new file mode 100644 index 000000000..55762f6d1 --- /dev/null +++ b/miext/shadow/shiplan2p8.c @@ -0,0 +1,137 @@ +/* + * + * Copyright © 2013 Geert Uytterhoeven + * + * 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 Geert Uytterhoeven not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Geert Uytterhoeven makes no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * GEERT UYTTERHOEVEN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL GEERT UYTTERHOEVEN 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. + * + * Based on shpacked.c, which is Copyright © 2000 Keith Packard + */ + +#ifdef HAVE_DIX_CONFIG_H +#include +#endif + +#include + +#include +#include "scrnintstr.h" +#include "windowstr.h" +#include +#include "dixfontstr.h" +#include +#include "mi.h" +#include "regionstr.h" +#include "globals.h" +#include "gcstruct.h" +#include "shadow.h" +#include "fb.h" +#include "c2p_core.h" + + + /* + * Perform a full C2P step on 16 8-bit pixels, stored in 4 32-bit words + * containing + * - 16 8-bit chunky pixels on input + * - permutated planar data (2 planes per 32-bit word) on output + */ + +static void c2p_16x8(CARD32 d[4]) +{ + transp4(d, 8, 2); + transp4(d, 1, 2); + transp4x(d, 16, 2); + transp4x(d, 2, 2); + transp4(d, 4, 1); +} + + + /* + * Store a full block of permutated iplan2p8 data after c2p conversion + */ + +static inline void store_iplan2p8(void *dst, const CARD32 d[4]) +{ + CARD32 *p = dst; + + *p++ = d[1]; + *p++ = d[3]; + *p++ = d[0]; + *p++ = d[2]; +} + + +void +shadowUpdateIplan2p8(ScreenPtr pScreen, shadowBufPtr pBuf) +{ + RegionPtr damage = shadowDamage(pBuf); + PixmapPtr pShadow = pBuf->pPixmap; + int nbox = RegionNumRects(damage); + BoxPtr pbox = RegionRects(damage); + FbBits *shaBase; + CARD16 *shaLine, *sha; + FbStride shaStride; + int scrLine; + _X_UNUSED int shaBpp, shaXoff, shaYoff; + int x, y, w, h; + int i, n; + CARD16 *win; + _X_UNUSED CARD32 winSize; + union { + CARD8 bytes[16]; + CARD32 words[4]; + } d; + + fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, + shaYoff); + shaStride *= sizeof(FbBits) / sizeof(CARD16); + + while (nbox--) { + x = pbox->x1; + y = pbox->y1; + w = pbox->x2 - pbox->x1; + h = pbox->y2 - pbox->y1; + + scrLine = x & -16; + shaLine = (CARD16 *)shaBase + y * shaStride + scrLine / sizeof(CARD16); + + n = ((x & 15) + w + 15) / 16; /* number of c2p units in scanline */ + + while (h--) { + sha = shaLine; + win = (CARD16 *) (*pBuf->window) (pScreen, + y, + scrLine, + SHADOW_WINDOW_WRITE, + &winSize, + pBuf->closure); + if (!win) + return; + for (i = 0; i < n; i++) { + memcpy(d.bytes, sha, sizeof(d.bytes)); + c2p_16x8(d.words); + store_iplan2p8(win, d.words); + sha += sizeof(d.bytes) / sizeof(*sha); + win += sizeof(d.bytes) / sizeof(*win); + } + shaLine += shaStride; + y++; + } + pbox++; + } +} -- cgit v1.2.3