From 3f7506b0fca72b2462b85bc4f613de809ae95859 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 10 Mar 2013 21:01:02 +0100 Subject: [PATCH] Shadow: Add support for Atari iplan2p4 Add support for Atari-style interleaved bitplanes, with 2 bytes interleave and 4 bits per pixel. Signed-off-by: Geert Uytterhoeven Acked-by: Keith Packard --- miext/shadow/Makefile.am | 1 + miext/shadow/shadow.h | 3 + miext/shadow/shiplan2p4.c | 136 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+) create mode 100644 miext/shadow/shiplan2p4.c diff --git a/miext/shadow/Makefile.am b/miext/shadow/Makefile.am index 30f7bda96..adb10bfd4 100644 --- a/miext/shadow/Makefile.am +++ b/miext/shadow/Makefile.am @@ -10,6 +10,7 @@ libshadow_la_SOURCES = \ shadow.c \ shadow.h \ shalloc.c \ + shiplan2p4.c \ shpacked.c \ shplanar8.c \ shplanar.c \ diff --git a/miext/shadow/shadow.h b/miext/shadow/shadow.h index 83de22ccc..d62903cb7 100644 --- a/miext/shadow/shadow.h +++ b/miext/shadow/shadow.h @@ -95,6 +95,9 @@ shadowInit(ScreenPtr pScreen, ShadowUpdateProc update, ShadowWindowProc window); extern _X_EXPORT void *shadowAlloc(int width, int height, int bpp); +extern _X_EXPORT void + shadowUpdateIplan2p4(ScreenPtr pScreen, shadowBufPtr pBuf); + extern _X_EXPORT void shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf); diff --git a/miext/shadow/shiplan2p4.c b/miext/shadow/shiplan2p4.c new file mode 100644 index 000000000..79ada99a4 --- /dev/null +++ b/miext/shadow/shiplan2p4.c @@ -0,0 +1,136 @@ +/* + * + * 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 4-bit pixels, stored in 2 32-bit words + * containing + * - 16 4-bit chunky pixels on input + * - permutated planar data (2 planes per 32-bit word) on output + */ + +static void c2p_16x4(CARD32 d[2]) +{ + transp2(d, 8); + transp2(d, 2); + transp2x(d, 1); + transp2(d, 16); + transp2(d, 4); + transp2(d, 1); +} + + + /* + * Store a full block of iplan2p4 data after c2p conversion + */ + +static inline void store_iplan2p4(void *dst, const CARD32 d[2]) +{ + CARD32 *p = dst; + + *p++ = d[0]; + *p++ = d[1]; +} + + +void +shadowUpdateIplan2p4(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[8]; + CARD32 words[2]; + } 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) / 2; + 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_16x4(d.words); + store_iplan2p4(win, d.words); + sha += sizeof(d.bytes) / sizeof(*sha); + win += sizeof(d.bytes) / sizeof(*win); + } + shaLine += shaStride; + y++; + } + pbox++; + } +}