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/*
* 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++;
}
}
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