464 lines
15 KiB
C
464 lines
15 KiB
C
/*
|
|
* Copyright © 1998 Keith Packard
|
|
*
|
|
* 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 Keith Packard not be used in
|
|
* advertising or publicity pertaining to distribution of the software without
|
|
* specific, written prior permission. Keith Packard makes no
|
|
* representations about the suitability of this software for any purpose. It
|
|
* is provided "as is" without express or implied warranty.
|
|
*
|
|
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL KEITH PACKARD 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.
|
|
*/
|
|
|
|
#ifdef HAVE_DIX_CONFIG_H
|
|
#include <dix-config.h>
|
|
#endif
|
|
|
|
#include "fb.h"
|
|
|
|
/*
|
|
* Stipple masks are independent of bit/byte order as long
|
|
* as bitorder == byteorder. FB doesn't handle the case
|
|
* where these differ
|
|
*/
|
|
#define BitsMask(x,w) ((FB_ALLONES << ((x) & FB_MASK)) & \
|
|
(FB_ALLONES >> ((FB_UNIT - ((x) + (w))) & FB_MASK)))
|
|
|
|
#define Mask(x,w) BitsMask((x)*(w),(w))
|
|
|
|
#define SelMask(b,n,w) ((((b) >> n) & 1) * Mask(n,w))
|
|
|
|
#define C1(b,w) \
|
|
(SelMask(b,0,w))
|
|
|
|
#define C2(b,w) \
|
|
(SelMask(b,0,w) | \
|
|
SelMask(b,1,w))
|
|
|
|
#define C4(b,w) \
|
|
(SelMask(b,0,w) | \
|
|
SelMask(b,1,w) | \
|
|
SelMask(b,2,w) | \
|
|
SelMask(b,3,w))
|
|
|
|
#define C8(b,w) \
|
|
(SelMask(b,0,w) | \
|
|
SelMask(b,1,w) | \
|
|
SelMask(b,2,w) | \
|
|
SelMask(b,3,w) | \
|
|
SelMask(b,4,w) | \
|
|
SelMask(b,5,w) | \
|
|
SelMask(b,6,w) | \
|
|
SelMask(b,7,w))
|
|
|
|
static const FbBits fbStipple8Bits[256] = {
|
|
C8(0, 4), C8(1, 4), C8(2, 4), C8(3, 4), C8(4, 4), C8(5, 4),
|
|
C8(6, 4), C8(7, 4), C8(8, 4), C8(9, 4), C8(10, 4), C8(11, 4),
|
|
C8(12, 4), C8(13, 4), C8(14, 4), C8(15, 4), C8(16, 4), C8(17, 4),
|
|
C8(18, 4), C8(19, 4), C8(20, 4), C8(21, 4), C8(22, 4), C8(23, 4),
|
|
C8(24, 4), C8(25, 4), C8(26, 4), C8(27, 4), C8(28, 4), C8(29, 4),
|
|
C8(30, 4), C8(31, 4), C8(32, 4), C8(33, 4), C8(34, 4), C8(35, 4),
|
|
C8(36, 4), C8(37, 4), C8(38, 4), C8(39, 4), C8(40, 4), C8(41, 4),
|
|
C8(42, 4), C8(43, 4), C8(44, 4), C8(45, 4), C8(46, 4), C8(47, 4),
|
|
C8(48, 4), C8(49, 4), C8(50, 4), C8(51, 4), C8(52, 4), C8(53, 4),
|
|
C8(54, 4), C8(55, 4), C8(56, 4), C8(57, 4), C8(58, 4), C8(59, 4),
|
|
C8(60, 4), C8(61, 4), C8(62, 4), C8(63, 4), C8(64, 4), C8(65, 4),
|
|
C8(66, 4), C8(67, 4), C8(68, 4), C8(69, 4), C8(70, 4), C8(71, 4),
|
|
C8(72, 4), C8(73, 4), C8(74, 4), C8(75, 4), C8(76, 4), C8(77, 4),
|
|
C8(78, 4), C8(79, 4), C8(80, 4), C8(81, 4), C8(82, 4), C8(83, 4),
|
|
C8(84, 4), C8(85, 4), C8(86, 4), C8(87, 4), C8(88, 4), C8(89, 4),
|
|
C8(90, 4), C8(91, 4), C8(92, 4), C8(93, 4), C8(94, 4), C8(95, 4),
|
|
C8(96, 4), C8(97, 4), C8(98, 4), C8(99, 4), C8(100, 4), C8(101, 4),
|
|
C8(102, 4), C8(103, 4), C8(104, 4), C8(105, 4), C8(106, 4), C8(107, 4),
|
|
C8(108, 4), C8(109, 4), C8(110, 4), C8(111, 4), C8(112, 4), C8(113, 4),
|
|
C8(114, 4), C8(115, 4), C8(116, 4), C8(117, 4), C8(118, 4), C8(119, 4),
|
|
C8(120, 4), C8(121, 4), C8(122, 4), C8(123, 4), C8(124, 4), C8(125, 4),
|
|
C8(126, 4), C8(127, 4), C8(128, 4), C8(129, 4), C8(130, 4), C8(131, 4),
|
|
C8(132, 4), C8(133, 4), C8(134, 4), C8(135, 4), C8(136, 4), C8(137, 4),
|
|
C8(138, 4), C8(139, 4), C8(140, 4), C8(141, 4), C8(142, 4), C8(143, 4),
|
|
C8(144, 4), C8(145, 4), C8(146, 4), C8(147, 4), C8(148, 4), C8(149, 4),
|
|
C8(150, 4), C8(151, 4), C8(152, 4), C8(153, 4), C8(154, 4), C8(155, 4),
|
|
C8(156, 4), C8(157, 4), C8(158, 4), C8(159, 4), C8(160, 4), C8(161, 4),
|
|
C8(162, 4), C8(163, 4), C8(164, 4), C8(165, 4), C8(166, 4), C8(167, 4),
|
|
C8(168, 4), C8(169, 4), C8(170, 4), C8(171, 4), C8(172, 4), C8(173, 4),
|
|
C8(174, 4), C8(175, 4), C8(176, 4), C8(177, 4), C8(178, 4), C8(179, 4),
|
|
C8(180, 4), C8(181, 4), C8(182, 4), C8(183, 4), C8(184, 4), C8(185, 4),
|
|
C8(186, 4), C8(187, 4), C8(188, 4), C8(189, 4), C8(190, 4), C8(191, 4),
|
|
C8(192, 4), C8(193, 4), C8(194, 4), C8(195, 4), C8(196, 4), C8(197, 4),
|
|
C8(198, 4), C8(199, 4), C8(200, 4), C8(201, 4), C8(202, 4), C8(203, 4),
|
|
C8(204, 4), C8(205, 4), C8(206, 4), C8(207, 4), C8(208, 4), C8(209, 4),
|
|
C8(210, 4), C8(211, 4), C8(212, 4), C8(213, 4), C8(214, 4), C8(215, 4),
|
|
C8(216, 4), C8(217, 4), C8(218, 4), C8(219, 4), C8(220, 4), C8(221, 4),
|
|
C8(222, 4), C8(223, 4), C8(224, 4), C8(225, 4), C8(226, 4), C8(227, 4),
|
|
C8(228, 4), C8(229, 4), C8(230, 4), C8(231, 4), C8(232, 4), C8(233, 4),
|
|
C8(234, 4), C8(235, 4), C8(236, 4), C8(237, 4), C8(238, 4), C8(239, 4),
|
|
C8(240, 4), C8(241, 4), C8(242, 4), C8(243, 4), C8(244, 4), C8(245, 4),
|
|
C8(246, 4), C8(247, 4), C8(248, 4), C8(249, 4), C8(250, 4), C8(251, 4),
|
|
C8(252, 4), C8(253, 4), C8(254, 4), C8(255, 4),
|
|
};
|
|
|
|
static const FbBits fbStipple4Bits[16] = {
|
|
C4(0, 8), C4(1, 8), C4(2, 8), C4(3, 8), C4(4, 8), C4(5, 8),
|
|
C4(6, 8), C4(7, 8), C4(8, 8), C4(9, 8), C4(10, 8), C4(11, 8),
|
|
C4(12, 8), C4(13, 8), C4(14, 8), C4(15, 8),
|
|
};
|
|
|
|
static const FbBits fbStipple2Bits[4] = {
|
|
C2(0, 16), C2(1, 16), C2(2, 16), C2(3, 16),
|
|
};
|
|
|
|
static const FbBits fbStipple1Bits[2] = {
|
|
C1(0, 32), C1(1, 32),
|
|
};
|
|
|
|
#ifdef __clang__
|
|
/* shift overflow is intentional */
|
|
#pragma clang diagnostic ignored "-Wshift-overflow"
|
|
#endif
|
|
|
|
/*
|
|
* Example: srcX = 13 dstX = 8 (FB unit 32 dstBpp 8)
|
|
*
|
|
* **** **** **** **** **** **** **** ****
|
|
* ^
|
|
* ******** ******** ******** ********
|
|
* ^
|
|
* leftShift = 12
|
|
* rightShift = 20
|
|
*
|
|
* Example: srcX = 0 dstX = 8 (FB unit 32 dstBpp 8)
|
|
*
|
|
* **** **** **** **** **** **** **** ****
|
|
* ^
|
|
* ******** ******** ******** ********
|
|
* ^
|
|
*
|
|
* leftShift = 24
|
|
* rightShift = 8
|
|
*/
|
|
|
|
#define LoadBits {\
|
|
if (leftShift) { \
|
|
bitsRight = (src < srcEnd ? READ(src++) : 0); \
|
|
bits = (FbStipLeft (bitsLeft, leftShift) | \
|
|
FbStipRight(bitsRight, rightShift)); \
|
|
bitsLeft = bitsRight; \
|
|
} else \
|
|
bits = (src < srcEnd ? READ(src++) : 0); \
|
|
}
|
|
|
|
void
|
|
fbBltOne(FbStip * src, FbStride srcStride, /* FbStip units per scanline */
|
|
int srcX, /* bit position of source */
|
|
FbBits * dst, FbStride dstStride, /* FbBits units per scanline */
|
|
int dstX, /* bit position of dest */
|
|
int dstBpp, /* bits per destination unit */
|
|
int width, /* width in bits of destination */
|
|
int height, /* height in scanlines */
|
|
FbBits fgand, /* rrop values */
|
|
FbBits fgxor, FbBits bgand, FbBits bgxor)
|
|
{
|
|
const FbBits *fbBits;
|
|
FbBits *srcEnd;
|
|
int pixelsPerDst; /* dst pixels per FbBits */
|
|
int unitsPerSrc; /* src patterns per FbStip */
|
|
int leftShift, rightShift; /* align source with dest */
|
|
FbBits startmask, endmask; /* dest scanline masks */
|
|
FbStip bits = 0, bitsLeft, bitsRight; /* source bits */
|
|
FbStip left;
|
|
FbBits mask;
|
|
int nDst; /* dest longwords (w.o. end) */
|
|
int w;
|
|
int n, nmiddle;
|
|
int dstS; /* stipple-relative dst X coordinate */
|
|
Bool copy; /* accelerate dest-invariant */
|
|
Bool transparent; /* accelerate 0 nop */
|
|
int srcinc; /* source units consumed */
|
|
Bool endNeedsLoad = FALSE; /* need load for endmask */
|
|
int startbyte, endbyte;
|
|
|
|
/*
|
|
* Do not read past the end of the buffer!
|
|
*/
|
|
srcEnd = src + height * srcStride;
|
|
|
|
/*
|
|
* Number of destination units in FbBits == number of stipple pixels
|
|
* used each time
|
|
*/
|
|
pixelsPerDst = FB_UNIT / dstBpp;
|
|
|
|
/*
|
|
* Number of source stipple patterns in FbStip
|
|
*/
|
|
unitsPerSrc = FB_STIP_UNIT / pixelsPerDst;
|
|
|
|
copy = FALSE;
|
|
transparent = FALSE;
|
|
if (bgand == 0 && fgand == 0)
|
|
copy = TRUE;
|
|
else if (bgand == FB_ALLONES && bgxor == 0)
|
|
transparent = TRUE;
|
|
|
|
/*
|
|
* Adjust source and dest to nearest FbBits boundary
|
|
*/
|
|
src += srcX >> FB_STIP_SHIFT;
|
|
dst += dstX >> FB_SHIFT;
|
|
srcX &= FB_STIP_MASK;
|
|
dstX &= FB_MASK;
|
|
|
|
FbMaskBitsBytes(dstX, width, copy,
|
|
startmask, startbyte, nmiddle, endmask, endbyte);
|
|
|
|
/*
|
|
* Compute effective dest alignment requirement for
|
|
* source -- must align source to dest unit boundary
|
|
*/
|
|
dstS = dstX / dstBpp;
|
|
/*
|
|
* Compute shift constants for effective alignement
|
|
*/
|
|
if (srcX >= dstS) {
|
|
leftShift = srcX - dstS;
|
|
rightShift = FB_STIP_UNIT - leftShift;
|
|
}
|
|
else {
|
|
rightShift = dstS - srcX;
|
|
leftShift = FB_STIP_UNIT - rightShift;
|
|
}
|
|
/*
|
|
* Get pointer to stipple mask array for this depth
|
|
*/
|
|
fbBits = 0; /* unused */
|
|
switch (pixelsPerDst) {
|
|
case 8:
|
|
fbBits = fbStipple8Bits;
|
|
break;
|
|
case 4:
|
|
fbBits = fbStipple4Bits;
|
|
break;
|
|
case 2:
|
|
fbBits = fbStipple2Bits;
|
|
break;
|
|
case 1:
|
|
fbBits = fbStipple1Bits;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Compute total number of destination words written, but
|
|
* don't count endmask
|
|
*/
|
|
nDst = nmiddle;
|
|
if (startmask)
|
|
nDst++;
|
|
|
|
dstStride -= nDst;
|
|
|
|
/*
|
|
* Compute total number of source words consumed
|
|
*/
|
|
|
|
srcinc = (nDst + unitsPerSrc - 1) / unitsPerSrc;
|
|
|
|
if (srcX > dstS)
|
|
srcinc++;
|
|
if (endmask) {
|
|
endNeedsLoad = nDst % unitsPerSrc == 0;
|
|
if (endNeedsLoad)
|
|
srcinc++;
|
|
}
|
|
|
|
srcStride -= srcinc;
|
|
|
|
/*
|
|
* Copy rectangle
|
|
*/
|
|
while (height--) {
|
|
w = nDst; /* total units across scanline */
|
|
n = unitsPerSrc; /* units avail in single stipple */
|
|
if (n > w)
|
|
n = w;
|
|
|
|
bitsLeft = 0;
|
|
if (srcX > dstS)
|
|
bitsLeft = READ(src++);
|
|
if (n) {
|
|
/*
|
|
* Load first set of stipple bits
|
|
*/
|
|
LoadBits;
|
|
|
|
/*
|
|
* Consume stipple bits for startmask
|
|
*/
|
|
if (startmask) {
|
|
mask = fbBits[FbLeftStipBits(bits, pixelsPerDst)];
|
|
if (mask || !transparent)
|
|
FbDoLeftMaskByteStippleRRop(dst, mask,
|
|
fgand, fgxor, bgand, bgxor,
|
|
startbyte, startmask);
|
|
bits = FbStipLeft(bits, pixelsPerDst);
|
|
dst++;
|
|
n--;
|
|
w--;
|
|
}
|
|
/*
|
|
* Consume stipple bits across scanline
|
|
*/
|
|
for (;;) {
|
|
w -= n;
|
|
if (copy) {
|
|
while (n--) {
|
|
mask = fbBits[FbLeftStipBits(bits, pixelsPerDst)];
|
|
WRITE(dst, FbOpaqueStipple(mask, fgxor, bgxor));
|
|
dst++;
|
|
bits = FbStipLeft(bits, pixelsPerDst);
|
|
}
|
|
}
|
|
else {
|
|
while (n--) {
|
|
left = FbLeftStipBits(bits, pixelsPerDst);
|
|
if (left || !transparent) {
|
|
mask = fbBits[left];
|
|
WRITE(dst, FbStippleRRop(READ(dst), mask, fgand,
|
|
fgxor, bgand, bgxor));
|
|
}
|
|
dst++;
|
|
bits = FbStipLeft(bits, pixelsPerDst);
|
|
}
|
|
}
|
|
if (!w)
|
|
break;
|
|
/*
|
|
* Load another set and reset number of available units
|
|
*/
|
|
LoadBits;
|
|
n = unitsPerSrc;
|
|
if (n > w)
|
|
n = w;
|
|
}
|
|
}
|
|
/*
|
|
* Consume stipple bits for endmask
|
|
*/
|
|
if (endmask) {
|
|
if (endNeedsLoad) {
|
|
LoadBits;
|
|
}
|
|
mask = fbBits[FbLeftStipBits(bits, pixelsPerDst)];
|
|
if (mask || !transparent)
|
|
FbDoRightMaskByteStippleRRop(dst, mask, fgand, fgxor,
|
|
bgand, bgxor, endbyte, endmask);
|
|
}
|
|
dst += dstStride;
|
|
src += srcStride;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Not very efficient, but simple -- copy a single plane
|
|
* from an N bit image to a 1 bit image
|
|
*/
|
|
|
|
void
|
|
fbBltPlane(FbBits * src,
|
|
FbStride srcStride,
|
|
int srcX,
|
|
int srcBpp,
|
|
FbStip * dst,
|
|
FbStride dstStride,
|
|
int dstX,
|
|
int width,
|
|
int height,
|
|
FbStip fgand,
|
|
FbStip fgxor, FbStip bgand, FbStip bgxor, Pixel planeMask)
|
|
{
|
|
FbBits *s;
|
|
FbBits pm;
|
|
FbBits srcMask;
|
|
FbBits srcMaskFirst;
|
|
FbBits srcMask0 = 0;
|
|
FbBits srcBits;
|
|
|
|
FbStip dstBits;
|
|
FbStip *d;
|
|
FbStip dstMask;
|
|
FbStip dstMaskFirst;
|
|
FbStip dstUnion;
|
|
int w;
|
|
int wt;
|
|
|
|
if (!width)
|
|
return;
|
|
|
|
src += srcX >> FB_SHIFT;
|
|
srcX &= FB_MASK;
|
|
|
|
dst += dstX >> FB_STIP_SHIFT;
|
|
dstX &= FB_STIP_MASK;
|
|
|
|
w = width / srcBpp;
|
|
|
|
pm = fbReplicatePixel(planeMask, srcBpp);
|
|
srcMaskFirst = pm & FbBitsMask(srcX, srcBpp);
|
|
srcMask0 = pm & FbBitsMask(0, srcBpp);
|
|
|
|
dstMaskFirst = FbStipMask(dstX, 1);
|
|
while (height--) {
|
|
d = dst;
|
|
dst += dstStride;
|
|
s = src;
|
|
src += srcStride;
|
|
|
|
srcMask = srcMaskFirst;
|
|
srcBits = READ(s++);
|
|
|
|
dstMask = dstMaskFirst;
|
|
dstUnion = 0;
|
|
dstBits = 0;
|
|
|
|
wt = w;
|
|
|
|
while (wt--) {
|
|
if (!srcMask) {
|
|
srcBits = READ(s++);
|
|
srcMask = srcMask0;
|
|
}
|
|
if (!dstMask) {
|
|
WRITE(d, FbStippleRRopMask(READ(d), dstBits,
|
|
fgand, fgxor, bgand, bgxor,
|
|
dstUnion));
|
|
d++;
|
|
dstMask = FbStipMask(0, 1);
|
|
dstUnion = 0;
|
|
dstBits = 0;
|
|
}
|
|
if (srcBits & srcMask)
|
|
dstBits |= dstMask;
|
|
dstUnion |= dstMask;
|
|
if (srcBpp == FB_UNIT)
|
|
srcMask = 0;
|
|
else
|
|
srcMask = FbScrRight(srcMask, srcBpp);
|
|
dstMask = FbStipRight(dstMask, 1);
|
|
}
|
|
if (dstUnion)
|
|
WRITE(d, FbStippleRRopMask(READ(d), dstBits,
|
|
fgand, fgxor, bgand, bgxor, dstUnion));
|
|
}
|
|
}
|