LibertyBSD_xenocara/xenocara/xserver/fb/fbutil.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"

FbBits
fbReplicatePixel(Pixel p, int bpp)
{
    FbBits b = p;

    b &= FbFullMask(bpp);
    while (bpp < FB_UNIT) {
        b |= b << bpp;
        bpp <<= 1;
    }
    return b;
}

void
fbReduceRasterOp(int rop, FbBits fg, FbBits pm, FbBits * andp, FbBits * xorp)
{
    FbBits and, xor;

    switch (rop) {
    default:
    case GXclear:              /* 0 0 0 0 */
        and = 0;
        xor = 0;
        break;
    case GXand:                /* 0 0 0 1 */
        and = fg;
        xor = 0;
        break;
    case GXandReverse:         /* 0 0 1 0 */
        and = fg;
        xor = fg;
        break;
    case GXcopy:               /* 0 0 1 1 */
        and = 0;
        xor = fg;
        break;
    case GXandInverted:        /* 0 1 0 0 */
        and = ~fg;
        xor = 0;
        break;
    case GXnoop:               /* 0 1 0 1 */
        and = FB_ALLONES;
        xor = 0;
        break;
    case GXxor:                /* 0 1 1 0 */
        and = FB_ALLONES;
        xor = fg;
        break;
    case GXor:                 /* 0 1 1 1 */
        and = ~fg;
        xor = fg;
        break;
    case GXnor:                /* 1 0 0 0 */
        and = ~fg;
        xor = ~fg;
        break;
    case GXequiv:              /* 1 0 0 1 */
        and = FB_ALLONES;
        xor = ~fg;
        break;
    case GXinvert:             /* 1 0 1 0 */
        and = FB_ALLONES;
        xor = FB_ALLONES;
        break;
    case GXorReverse:          /* 1 0 1 1 */
        and = ~fg;
        xor = FB_ALLONES;
        break;
    case GXcopyInverted:       /* 1 1 0 0 */
        and = 0;
        xor = ~fg;
        break;
    case GXorInverted:         /* 1 1 0 1 */
        and = fg;
        xor = ~fg;
        break;
    case GXnand:               /* 1 1 1 0 */
        and = fg;
        xor = FB_ALLONES;
        break;
    case GXset:                /* 1 1 1 1 */
        and = 0;
        xor = FB_ALLONES;
        break;
    }
    and |= ~pm;
    xor &= pm;
    *andp = and;
    *xorp = xor;
}

#define O 0
#define I FB_ALLONES

const FbMergeRopRec FbMergeRopBits[16] = {
    {O, O, O, O},               /* clear         0x0         0 */
    {I, O, O, O},               /* and           0x1         src AND dst */
    {I, O, I, O},               /* andReverse    0x2         src AND NOT dst */
    {O, O, I, O},               /* copy          0x3         src */
    {I, I, O, O},               /* andInverted   0x4         NOT src AND dst */
    {O, I, O, O},               /* noop          0x5         dst */
    {O, I, I, O},               /* xor           0x6         src XOR dst */
    {I, I, I, O},               /* or            0x7         src OR dst */
    {I, I, I, I},               /* nor           0x8         NOT src AND NOT dst */
    {O, I, I, I},               /* equiv         0x9         NOT src XOR dst */
    {O, I, O, I},               /* invert        0xa         NOT dst */
    {I, I, O, I},               /* orReverse     0xb         src OR NOT dst */
    {O, O, I, I},               /* copyInverted  0xc         NOT src */
    {I, O, I, I},               /* orInverted    0xd         NOT src OR dst */
    {I, O, O, I},               /* nand          0xe         NOT src OR NOT dst */
    {O, O, O, I},               /* set           0xf         1 */
};

/*
 * 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))

#if FB_UNIT == 16
#define fbStipple16Bits 0
#define fbStipple8Bits 0
const FbBits fbStipple4Bits[16] = {
    C4(0, 4), C4(1, 4), C4(2, 4), C4(3, 4), C4(4, 4), C4(5, 4),
    C4(6, 4), C4(7, 4), C4(8, 4), C4(9, 4), C4(10, 4), C4(11, 4),
    C4(12, 4), C4(13, 4), C4(14, 4), C4(15, 4),
};

const FbBits fbStipple2Bits[4] = {
    C2(0, 8), C2(1, 8), C2(2, 8), C2(3, 8),
};

const FbBits fbStipple1Bits[2] = {
    C1(0, 16), C1(1, 16),
};
#endif
#if FB_UNIT == 32
#define fbStipple16Bits 0
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),
};

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),
};

const FbBits fbStipple2Bits[4] = {
    C2(0, 16), C2(1, 16), C2(2, 16), C2(3, 16),
};

const FbBits fbStipple1Bits[2] = {
    C1(0, 32), C1(1, 32),
};
#endif
#if FB_UNIT == 64
const FbBits fbStipple16Bits[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),
};

const FbBits fbStipple8Bits[256] = {
    C8(0, 8), C8(1, 8), C8(2, 8), C8(3, 8), C8(4, 8), C8(5, 8),
    C8(6, 8), C8(7, 8), C8(8, 8), C8(9, 8), C8(10, 8), C8(11, 8),
    C8(12, 8), C8(13, 8), C8(14, 8), C8(15, 8), C8(16, 8), C8(17, 8),
    C8(18, 8), C8(19, 8), C8(20, 8), C8(21, 8), C8(22, 8), C8(23, 8),
    C8(24, 8), C8(25, 8), C8(26, 8), C8(27, 8), C8(28, 8), C8(29, 8),
    C8(30, 8), C8(31, 8), C8(32, 8), C8(33, 8), C8(34, 8), C8(35, 8),
    C8(36, 8), C8(37, 8), C8(38, 8), C8(39, 8), C8(40, 8), C8(41, 8),
    C8(42, 8), C8(43, 8), C8(44, 8), C8(45, 8), C8(46, 8), C8(47, 8),
    C8(48, 8), C8(49, 8), C8(50, 8), C8(51, 8), C8(52, 8), C8(53, 8),
    C8(54, 8), C8(55, 8), C8(56, 8), C8(57, 8), C8(58, 8), C8(59, 8),
    C8(60, 8), C8(61, 8), C8(62, 8), C8(63, 8), C8(64, 8), C8(65, 8),
    C8(66, 8), C8(67, 8), C8(68, 8), C8(69, 8), C8(70, 8), C8(71, 8),
    C8(72, 8), C8(73, 8), C8(74, 8), C8(75, 8), C8(76, 8), C8(77, 8),
    C8(78, 8), C8(79, 8), C8(80, 8), C8(81, 8), C8(82, 8), C8(83, 8),
    C8(84, 8), C8(85, 8), C8(86, 8), C8(87, 8), C8(88, 8), C8(89, 8),
    C8(90, 8), C8(91, 8), C8(92, 8), C8(93, 8), C8(94, 8), C8(95, 8),
    C8(96, 8), C8(97, 8), C8(98, 8), C8(99, 8), C8(100, 8), C8(101, 8),
    C8(102, 8), C8(103, 8), C8(104, 8), C8(105, 8), C8(106, 8), C8(107, 8),
    C8(108, 8), C8(109, 8), C8(110, 8), C8(111, 8), C8(112, 8), C8(113, 8),
    C8(114, 8), C8(115, 8), C8(116, 8), C8(117, 8), C8(118, 8), C8(119, 8),
    C8(120, 8), C8(121, 8), C8(122, 8), C8(123, 8), C8(124, 8), C8(125, 8),
    C8(126, 8), C8(127, 8), C8(128, 8), C8(129, 8), C8(130, 8), C8(131, 8),
    C8(132, 8), C8(133, 8), C8(134, 8), C8(135, 8), C8(136, 8), C8(137, 8),
    C8(138, 8), C8(139, 8), C8(140, 8), C8(141, 8), C8(142, 8), C8(143, 8),
    C8(144, 8), C8(145, 8), C8(146, 8), C8(147, 8), C8(148, 8), C8(149, 8),
    C8(150, 8), C8(151, 8), C8(152, 8), C8(153, 8), C8(154, 8), C8(155, 8),
    C8(156, 8), C8(157, 8), C8(158, 8), C8(159, 8), C8(160, 8), C8(161, 8),
    C8(162, 8), C8(163, 8), C8(164, 8), C8(165, 8), C8(166, 8), C8(167, 8),
    C8(168, 8), C8(169, 8), C8(170, 8), C8(171, 8), C8(172, 8), C8(173, 8),
    C8(174, 8), C8(175, 8), C8(176, 8), C8(177, 8), C8(178, 8), C8(179, 8),
    C8(180, 8), C8(181, 8), C8(182, 8), C8(183, 8), C8(184, 8), C8(185, 8),
    C8(186, 8), C8(187, 8), C8(188, 8), C8(189, 8), C8(190, 8), C8(191, 8),
    C8(192, 8), C8(193, 8), C8(194, 8), C8(195, 8), C8(196, 8), C8(197, 8),
    C8(198, 8), C8(199, 8), C8(200, 8), C8(201, 8), C8(202, 8), C8(203, 8),
    C8(204, 8), C8(205, 8), C8(206, 8), C8(207, 8), C8(208, 8), C8(209, 8),
    C8(210, 8), C8(211, 8), C8(212, 8), C8(213, 8), C8(214, 8), C8(215, 8),
    C8(216, 8), C8(217, 8), C8(218, 8), C8(219, 8), C8(220, 8), C8(221, 8),
    C8(222, 8), C8(223, 8), C8(224, 8), C8(225, 8), C8(226, 8), C8(227, 8),
    C8(228, 8), C8(229, 8), C8(230, 8), C8(231, 8), C8(232, 8), C8(233, 8),
    C8(234, 8), C8(235, 8), C8(236, 8), C8(237, 8), C8(238, 8), C8(239, 8),
    C8(240, 8), C8(241, 8), C8(242, 8), C8(243, 8), C8(244, 8), C8(245, 8),
    C8(246, 8), C8(247, 8), C8(248, 8), C8(249, 8), C8(250, 8), C8(251, 8),
    C8(252, 8), C8(253, 8), C8(254, 8), C8(255, 8),
};

const FbBits fbStipple4Bits[16] = {
    C4(0, 16), C4(1, 16), C4(2, 16), C4(3, 16), C4(4, 16), C4(5, 16),
    C4(6, 16), C4(7, 16), C4(8, 16), C4(9, 16), C4(10, 16), C4(11, 16),
    C4(12, 16), C4(13, 16), C4(14, 16), C4(15, 16),
};

const FbBits fbStipple2Bits[4] = {
    C2(0, 32), C2(1, 32), C2(2, 32), C2(3, 32),
};

#define fbStipple1Bits 0
#endif
const FbBits *const fbStippleTable[] = {
    0,
    fbStipple1Bits,
    fbStipple2Bits,
    0,
    fbStipple4Bits,
    0,
    0,
    0,
    fbStipple8Bits,
};