140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/*
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* Copyright © 2013 Geert Uytterhoeven
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Based on shpacked.c, which is Copyright © 2000 Keith Packard
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <stdlib.h>
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#include <X11/X.h>
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#include "scrnintstr.h"
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#include "windowstr.h"
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#include <X11/fonts/font.h>
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#include "dixfontstr.h"
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#include <X11/fonts/fontstruct.h>
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#include "mi.h"
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#include "regionstr.h"
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#include "globals.h"
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#include "gcstruct.h"
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#include "shadow.h"
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#include "fb.h"
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#include "c2p_core.h"
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/*
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* Perform a full C2P step on 32 4-bit pixels, stored in 4 32-bit words
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* containing
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* - 32 4-bit chunky pixels on input
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* - permutated planar data (1 plane per 32-bit word) on output
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*/
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static void c2p_32x4(CARD32 d[4])
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{
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transp4(d, 16, 2);
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transp4(d, 8, 1);
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transp4(d, 4, 2);
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transp4(d, 2, 1);
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transp4(d, 1, 2);
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}
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/*
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* Store a full block of permutated planar data after c2p conversion
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*/
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static inline void store_afb4(void *dst, unsigned int stride,
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const CARD32 d[4])
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{
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CARD8 *p = dst;
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*(CARD32 *)p = d[3]; p += stride;
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*(CARD32 *)p = d[1]; p += stride;
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*(CARD32 *)p = d[2]; p += stride;
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*(CARD32 *)p = d[0]; p += stride;
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}
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void
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shadowUpdateAfb4(ScreenPtr pScreen, shadowBufPtr pBuf)
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{
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RegionPtr damage = shadowDamage(pBuf);
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PixmapPtr pShadow = pBuf->pPixmap;
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int nbox = RegionNumRects(damage);
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BoxPtr pbox = RegionRects(damage);
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FbBits *shaBase;
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CARD32 *shaLine, *sha;
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FbStride shaStride;
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int scrLine;
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_X_UNUSED int shaBpp, shaXoff, shaYoff;
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int x, y, w, h;
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int i, n;
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CARD32 *win;
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CARD32 off, winStride;
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union {
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CARD8 bytes[16];
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CARD32 words[4];
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} d;
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fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
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shaYoff);
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if (sizeof(FbBits) != sizeof(CARD32))
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shaStride = shaStride * sizeof(FbBits) / sizeof(CARD32);
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while (nbox--) {
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x = pbox->x1;
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y = pbox->y1;
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w = pbox->x2 - pbox->x1;
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h = pbox->y2 - pbox->y1;
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scrLine = (x & -32) / 2;
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shaLine = (CARD32 *)shaBase + y * shaStride + scrLine / sizeof(CARD32);
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off = scrLine / 4; /* byte offset in bitplane scanline */
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n = ((x & 31) + w + 31) / 32; /* number of c2p units in scanline */
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while (h--) {
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sha = shaLine;
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win = (CARD32 *) (*pBuf->window) (pScreen,
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y,
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off,
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SHADOW_WINDOW_WRITE,
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&winStride,
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pBuf->closure);
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if (!win)
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return;
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for (i = 0; i < n; i++) {
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memcpy(d.bytes, sha, sizeof(d.bytes));
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c2p_32x4(d.words);
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store_afb4(win++, winStride, d.words);
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sha += sizeof(d.bytes) / sizeof(*sha);
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}
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shaLine += shaStride;
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y++;
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}
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pbox++;
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}
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}
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