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/*
*
* 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 <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 32 4-bit pixels, stored in 4 32-bit words
* containing
* - 32 4-bit chunky pixels on input
* - permutated planar data (1 plane per 32-bit word) on output
*/
static void c2p_32x4(CARD32 d[4])
{
transp4(d, 16, 2);
transp4(d, 8, 1);
transp4(d, 4, 2);
transp4(d, 2, 1);
transp4(d, 1, 2);
}
/*
* Store a full block of permutated planar data after c2p conversion
*/
static inline void store_afb4(void *dst, unsigned int stride,
const CARD32 d[4])
{
CARD8 *p = dst;
*(CARD32 *)p = d[3]; p += stride;
*(CARD32 *)p = d[1]; p += stride;
*(CARD32 *)p = d[2]; p += stride;
*(CARD32 *)p = d[0]; p += stride;
}
void
shadowUpdateAfb4(ScreenPtr pScreen, shadowBufPtr pBuf)
{
RegionPtr damage = shadowDamage(pBuf);
PixmapPtr pShadow = pBuf->pPixmap;
int nbox = RegionNumRects(damage);
BoxPtr pbox = RegionRects(damage);
FbBits *shaBase;
CARD32 *shaLine, *sha;
FbStride shaStride;
int scrLine;
_X_UNUSED int shaBpp, shaXoff, shaYoff;
int x, y, w, h;
int i, n;
CARD32 *win;
CARD32 off, winStride;
union {
CARD8 bytes[16];
CARD32 words[4];
} d;
fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
shaYoff);
if (sizeof(FbBits) != sizeof(CARD32))
shaStride = shaStride * sizeof(FbBits) / sizeof(CARD32);
while (nbox--) {
x = pbox->x1;
y = pbox->y1;
w = pbox->x2 - pbox->x1;
h = pbox->y2 - pbox->y1;
scrLine = (x & -32) / 2;
shaLine = (CARD32 *)shaBase + y * shaStride + scrLine / sizeof(CARD32);
off = scrLine / 4; /* byte offset in bitplane scanline */
n = ((x & 31) + w + 31) / 32; /* number of c2p units in scanline */
while (h--) {
sha = shaLine;
win = (CARD32 *) (*pBuf->window) (pScreen,
y,
off,
SHADOW_WINDOW_WRITE,
&winStride,
pBuf->closure);
if (!win)
return;
for (i = 0; i < n; i++) {
memcpy(d.bytes, sha, sizeof(d.bytes));
c2p_32x4(d.words);
store_afb4(win++, winStride, d.words);
sha += sizeof(d.bytes) / sizeof(*sha);
}
shaLine += shaStride;
y++;
}
pbox++;
}
}
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