Shadow: Add support for Amiga afb8
Add support for Amiga-style bitplanes, with 8 bits per pixel. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
parent
a1b8e7f1e6
commit
cfd1057681
|
@ -10,6 +10,7 @@ libshadow_la_SOURCES = \
|
|||
shadow.c \
|
||||
shadow.h \
|
||||
shafb4.c \
|
||||
shafb8.c \
|
||||
shalloc.c \
|
||||
shiplan2p4.c \
|
||||
shiplan2p8.c \
|
||||
|
|
|
@ -98,6 +98,9 @@ extern _X_EXPORT void *shadowAlloc(int width, int height, int bpp);
|
|||
extern _X_EXPORT void
|
||||
shadowUpdateAfb4(ScreenPtr pScreen, shadowBufPtr pBuf);
|
||||
|
||||
extern _X_EXPORT void
|
||||
shadowUpdateAfb8(ScreenPtr pScreen, shadowBufPtr pBuf);
|
||||
|
||||
extern _X_EXPORT void
|
||||
shadowUpdateIplan2p4(ScreenPtr pScreen, shadowBufPtr pBuf);
|
||||
|
||||
|
|
|
@ -0,0 +1,143 @@
|
|||
/*
|
||||
*
|
||||
* 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 8-bit pixels, stored in 8 32-bit words
|
||||
* containing
|
||||
* - 32 8-bit chunky pixels on input
|
||||
* - permutated planar data (1 plane per 32-bit word) on output
|
||||
*/
|
||||
|
||||
static void c2p_32x8(CARD32 d[8])
|
||||
{
|
||||
transp8(d, 16, 4);
|
||||
transp8(d, 8, 2);
|
||||
transp8(d, 4, 1);
|
||||
transp8(d, 2, 4);
|
||||
transp8(d, 1, 2);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Store a full block of permutated planar data after c2p conversion
|
||||
*/
|
||||
|
||||
static inline void store_afb8(void *dst, unsigned int stride,
|
||||
const CARD32 d[8])
|
||||
{
|
||||
CARD8 *p = dst;
|
||||
|
||||
*(CARD32 *)p = d[7]; p += stride;
|
||||
*(CARD32 *)p = d[5]; p += stride;
|
||||
*(CARD32 *)p = d[3]; p += stride;
|
||||
*(CARD32 *)p = d[1]; p += stride;
|
||||
*(CARD32 *)p = d[6]; p += stride;
|
||||
*(CARD32 *)p = d[4]; p += stride;
|
||||
*(CARD32 *)p = d[2]; p += stride;
|
||||
*(CARD32 *)p = d[0]; p += stride;
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
shadowUpdateAfb8(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[32];
|
||||
CARD32 words[8];
|
||||
} 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;
|
||||
shaLine = (CARD32 *)shaBase + y * shaStride + scrLine / sizeof(CARD32);
|
||||
|
||||
off = scrLine / 8; /* 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_32x8(d.words);
|
||||
store_afb8(win++, winStride, d.words);
|
||||
sha += sizeof(d.bytes) / sizeof(*sha);
|
||||
}
|
||||
shaLine += shaStride;
|
||||
y++;
|
||||
}
|
||||
pbox++;
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue