diff options
Diffstat (limited to 'xorg-server/miext/shadow/shiplan2p4.c')
| -rw-r--r-- | xorg-server/miext/shadow/shiplan2p4.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/xorg-server/miext/shadow/shiplan2p4.c b/xorg-server/miext/shadow/shiplan2p4.c new file mode 100644 index 000000000..0e46bae7a --- /dev/null +++ b/xorg-server/miext/shadow/shiplan2p4.c @@ -0,0 +1,136 @@ +/* + * Copyright © 2013 Geert Uytterhoeven + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Based on shpacked.c, which is Copyright © 2000 Keith Packard + */ + +#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" +#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++; + } +} |