a1b8e7f1e6
Add support for Amiga-style bitplanes, with 4 bits per pixel. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Keith Packard <keithp@keithp.com>
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/*
|
|
*
|
|
* 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++;
|
|
}
|
|
}
|