/*      $OpenBSD: omrasops1.c,v 1.4 2021/07/31 05:22:36 aoyama Exp $    */

/*
 * Copyright (c) 2005, Miodrag Vallat.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */
/*
 * Copyright (c) 1996 Jason R. Thorpe.  All rights reserved.
 * Copyright (c) 1991 University of Utah.
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department and Mark Davies of the Department of Computer
 * Science, Victoria University of Wellington, New Zealand.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Utah $Hdr: grf_hy.c 1.2 93/08/13$
 *
 *      @(#)grf_hy.c    8.4 (Berkeley) 1/12/94
 */

/*
 * Graphics routines for OMRON LUNA 1bpp and 4bpp frame buffer.
 * On LUNA's frame buffer, pixels are not byte-addressed.
 *
 * Based on src/sys/arch/hp300/dev/diofb_mono.c
 */

#include <sys/param.h>
#include <sys/systm.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>
#include <dev/rasops/rasops_masks.h>

#include <luna88k/dev/maskbits.h>
#include <luna88k/dev/omrasops.h>

#include <machine/board.h>
#define OMFB_FB_WADDR   (BMAP_BMP + 8)  /* common plane */

/* prototypes */
int om1_windowmove(struct rasops_info *, u_int16_t, u_int16_t,
        u_int16_t, u_int16_t, u_int16_t, u_int16_t, int16_t,
        int16_t /* ignored */);
int om4_windowmove(struct rasops_info *, u_int16_t, u_int16_t,
        u_int16_t, u_int16_t, u_int16_t, u_int16_t, int16_t,
        int16_t /* ignored */);

/*
 * Block-move function - 1bpp version
 */
int
om1_windowmove(struct rasops_info *ri, u_int16_t sx, u_int16_t sy,
        u_int16_t dx, u_int16_t dy, u_int16_t cx, u_int16_t cy, int16_t rop,
        int16_t planemask /* ignored */)
{
        int width;              /* add to get to same position in next line */

        u_int32_t *psrcLine, *pdstLine;
                                /* pointers to line with current src and dst */
        u_int32_t *psrc;        /* pointer to current src longword */
        u_int32_t *pdst;        /* pointer to current dst longword */

                                /* following used for looping through a line */
        u_int32_t startmask, endmask;  /* masks for writing ends of dst */
        int nlMiddle;           /* whole longwords in dst */
        int nl;                 /* temp copy of nlMiddle */
        int xoffSrc;            /* offset (>= 0, < 32) from which to
                                   fetch whole longwords fetched in src */
        int nstart;             /* number of ragged bits at start of dst */
        int nend;               /* number of ragged bits at end of dst */
        int srcStartOver;       /* pulling nstart bits from src
                                   overflows into the next word? */

        width = ri->ri_stride / 4;      /* convert to number in longword */

        if (sy < dy) {  /* start at last scanline of rectangle */
                psrcLine = ((u_int32_t *)OMFB_FB_WADDR)
                                 + ((sy + cy - 1) * width);
                pdstLine = ((u_int32_t *)OMFB_FB_WADDR)
                                 + ((dy + cy - 1) * width);
                width = -width;
        } else {        /* start at first scanline */
                psrcLine = ((u_int32_t *)OMFB_FB_WADDR) + (sy * width);
                pdstLine = ((u_int32_t *)OMFB_FB_WADDR) + (dy * width);
        }

        /* x direction doesn't matter for < 1 longword */
        if (cx <= 32) {
                int srcBit, dstBit;     /* bit offset of src and dst */

                pdstLine += (dx >> 5);
                psrcLine += (sx >> 5);
                psrc = psrcLine;
                pdst = pdstLine;

                srcBit = sx & 0x1f;
                dstBit = dx & 0x1f;

                while (cy--) {
                        getandputrop(P0(psrc), srcBit, dstBit, cx, P0(pdst), rop);
                        pdst += width;
                        psrc += width;
                }
        } else {
                maskbits(dx, cx, startmask, endmask, nlMiddle);
                if (startmask)
                        nstart = 32 - (dx & 0x1f);
                else
                        nstart = 0;
                if (endmask)
                        nend = (dx + cx) & 0x1f;
                else
                        nend = 0;

                xoffSrc = ((sx & 0x1f) + nstart) & 0x1f;
                srcStartOver = ((sx & 0x1f) + nstart) > 31;

                if (sx >= dx) { /* move left to right */
                        pdstLine += (dx >> 5);
                        psrcLine += (sx >> 5);

                        while (cy--) {
                                psrc = psrcLine;
                                pdst = pdstLine;

                                if (startmask) {
                                        getandputrop(P0(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P0(pdst), rop);
                                        pdst++;
                                        if (srcStartOver)
                                                psrc++;
                                }

                                /* special case for aligned operations */
                                if (xoffSrc == 0) {
                                        nl = nlMiddle;
                                        while (nl--) {
                                                if (rop == RR_CLEAR)
                                                        *P0(pdst) = 0;
                                                else
                                                        *P0(pdst) = *P0(psrc);
                                                psrc++;
                                                pdst++;
                                        }
                                } else {
                                        nl = nlMiddle + 1;
                                        while (--nl) {
                                                if (rop == RR_CLEAR)
                                                        *P0(pdst) = 0;
                                                else
                                                        getunalignedword(P0(psrc),
                                                            xoffSrc, *P0(pdst));
                                                pdst++;
                                                psrc++;
                                        }
                                }

                                if (endmask) {
                                        getandputrop(P0(psrc), xoffSrc, 0, nend,
                                            P0(pdst), rop);
                                }

                                pdstLine += width;
                                psrcLine += width;
                        }
                } else {        /* move right to left */
                        pdstLine += ((dx + cx) >> 5);
                        psrcLine += ((sx + cx) >> 5);
                        /*
                         * If fetch of last partial bits from source crosses
                         * a longword boundary, start at the previous longword
                         */
                        if (xoffSrc + nend >= 32)
                                --psrcLine;

                        while (cy--) {
                                psrc = psrcLine;
                                pdst = pdstLine;

                                if (endmask) {
                                        getandputrop(P0(psrc), xoffSrc, 0, nend,
                                            P0(pdst), rop);
                                }

                                nl = nlMiddle + 1;
                                while (--nl) {
                                        --psrc;
                                        --pdst;
                                        if (rop == RR_CLEAR)
                                                *P0(pdst) = 0;
                                        else
                                                getunalignedword(P0(psrc), xoffSrc,
                                                    *P0(pdst));
                                }

                                if (startmask) {
                                        if (srcStartOver)
                                                --psrc;
                                        --pdst;
                                        getandputrop(P0(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P0(pdst), rop);
                                }

                                pdstLine += width;
                                psrcLine += width;
                        }
                }
        }

        return (0);
}

/*
 * Block-move function - 4bpp version
 */
int
om4_windowmove(struct rasops_info *ri, u_int16_t sx, u_int16_t sy,
        u_int16_t dx, u_int16_t dy, u_int16_t cx, u_int16_t cy, int16_t rop,
        int16_t planemask /* ignored */)
{
        int width;              /* add to get to same position in next line */

        u_int32_t *psrcLine, *pdstLine;
                                /* pointers to line with current src and dst */
        u_int32_t *psrc;        /* pointer to current src longword */
        u_int32_t *pdst;        /* pointer to current dst longword */

                                /* following used for looping through a line */
        u_int32_t startmask, endmask;  /* masks for writing ends of dst */
        int nlMiddle;           /* whole longwords in dst */
        int nl;                 /* temp copy of nlMiddle */
        int xoffSrc;            /* offset (>= 0, < 32) from which to
                                   fetch whole longwords fetched in src */
        int nstart;             /* number of ragged bits at start of dst */
        int nend;               /* number of ragged bits at end of dst */
        int srcStartOver;       /* pulling nstart bits from src
                                   overflows into the next word? */

        width = ri->ri_stride / 4;      /* convert to number in longword */

        if (sy < dy) {  /* start at last scanline of rectangle */
                psrcLine = ((u_int32_t *)OMFB_FB_WADDR)
                                 + ((sy + cy - 1) * width);
                pdstLine = ((u_int32_t *)OMFB_FB_WADDR)
                                 + ((dy + cy - 1) * width);
                width = -width;
        } else {        /* start at first scanline */
                psrcLine = ((u_int32_t *)OMFB_FB_WADDR) + (sy * width);
                pdstLine = ((u_int32_t *)OMFB_FB_WADDR) + (dy * width);
        }

        /* x direction doesn't matter for < 1 longword */
        if (cx <= 32) {
                int srcBit, dstBit;     /* bit offset of src and dst */

                pdstLine += (dx >> 5);
                psrcLine += (sx >> 5);
                psrc = psrcLine;
                pdst = pdstLine;

                srcBit = sx & 0x1f;
                dstBit = dx & 0x1f;

                while (cy--) {
                        getandputrop(P0(psrc), srcBit, dstBit, cx, P0(pdst), rop);
                        getandputrop(P1(psrc), srcBit, dstBit, cx, P1(pdst), rop);
                        getandputrop(P2(psrc), srcBit, dstBit, cx, P2(pdst), rop);
                        getandputrop(P3(psrc), srcBit, dstBit, cx, P3(pdst), rop);
                        pdst += width;
                        psrc += width;
                }
        } else {
                maskbits(dx, cx, startmask, endmask, nlMiddle);
                if (startmask)
                        nstart = 32 - (dx & 0x1f);
                else
                        nstart = 0;
                if (endmask)
                        nend = (dx + cx) & 0x1f;
                else
                        nend = 0;

                xoffSrc = ((sx & 0x1f) + nstart) & 0x1f;
                srcStartOver = ((sx & 0x1f) + nstart) > 31;

                if (sx >= dx) { /* move left to right */
                        pdstLine += (dx >> 5);
                        psrcLine += (sx >> 5);

                        while (cy--) {
                                psrc = psrcLine;
                                pdst = pdstLine;

                                if (startmask) {
                                        getandputrop(P0(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P0(pdst), rop);
                                        getandputrop(P1(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P1(pdst), rop);
                                        getandputrop(P2(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P2(pdst), rop);
                                        getandputrop(P3(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P3(pdst), rop);
                                        pdst++;
                                        if (srcStartOver)
                                                psrc++;
                                }

                                /* special case for aligned operations */
                                if (xoffSrc == 0) {
                                        nl = nlMiddle;
                                        while (nl--) {
                                                if (rop == RR_CLEAR) {
                                                        *P0(pdst) = 0;
                                                        *P1(pdst) = 0;
                                                        *P2(pdst) = 0;
                                                        *P3(pdst) = 0;
                                                } else {
                                                        *P0(pdst) = *P0(psrc);
                                                        *P1(pdst) = *P1(psrc);
                                                        *P2(pdst) = *P2(psrc);
                                                        *P3(pdst) = *P3(psrc);
                                                }
                                                psrc++;
                                                pdst++;
                                        }
                                } else {
                                        nl = nlMiddle + 1;
                                        while (--nl) {
                                                if (rop == RR_CLEAR) {
                                                        *P0(pdst) = 0;
                                                        *P1(pdst) = 0;
                                                        *P2(pdst) = 0;
                                                        *P3(pdst) = 0;
                                                } else {
                                                        getunalignedword(P0(psrc),
                                                            xoffSrc, *P0(pdst));
                                                        getunalignedword(P1(psrc),
                                                            xoffSrc, *P1(pdst));
                                                        getunalignedword(P2(psrc),
                                                            xoffSrc, *P2(pdst));
                                                        getunalignedword(P3(psrc),
                                                            xoffSrc, *P3(pdst));
                                                }
                                                pdst++;
                                                psrc++;
                                        }
                                }

                                if (endmask) {
                                        getandputrop(P0(psrc), xoffSrc, 0, nend,
                                            P0(pdst), rop);
                                        getandputrop(P1(psrc), xoffSrc, 0, nend,
                                            P1(pdst), rop);
                                        getandputrop(P2(psrc), xoffSrc, 0, nend,
                                            P2(pdst), rop);
                                        getandputrop(P3(psrc), xoffSrc, 0, nend,
                                            P3(pdst), rop);
                                }

                                pdstLine += width;
                                psrcLine += width;
                        }
                } else {        /* move right to left */
                        pdstLine += ((dx + cx) >> 5);
                        psrcLine += ((sx + cx) >> 5);
                        /*
                         * If fetch of last partial bits from source crosses
                         * a longword boundary, start at the previous longword
                         */
                        if (xoffSrc + nend >= 32)
                                --psrcLine;

                        while (cy--) {
                                psrc = psrcLine;
                                pdst = pdstLine;

                                if (endmask) {
                                        getandputrop(P0(psrc), xoffSrc, 0, nend,
                                            P0(pdst), rop);
                                        getandputrop(P1(psrc), xoffSrc, 0, nend,
                                            P1(pdst), rop);
                                        getandputrop(P2(psrc), xoffSrc, 0, nend,
                                            P2(pdst), rop);
                                        getandputrop(P3(psrc), xoffSrc, 0, nend,
                                            P3(pdst), rop);
                                }

                                nl = nlMiddle + 1;
                                while (--nl) {
                                        --psrc;
                                        --pdst;
                                        if (rop == RR_CLEAR) {
                                                *P0(pdst) = 0;
                                                *P1(pdst) = 0;
                                                *P2(pdst) = 0;
                                                *P3(pdst) = 0;
                                        } else {
                                                getunalignedword(P0(psrc),
                                                    xoffSrc, *P0(pdst));
                                                getunalignedword(P1(psrc),
                                                    xoffSrc, *P1(pdst));
                                                getunalignedword(P2(psrc),
                                                    xoffSrc, *P2(pdst));
                                                getunalignedword(P3(psrc),
                                                    xoffSrc, *P3(pdst));
                                        }
                                }

                                if (startmask) {
                                        if (srcStartOver)
                                                --psrc;
                                        --pdst;
                                        getandputrop(P0(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P0(pdst), rop);
                                        getandputrop(P1(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P1(pdst), rop);
                                        getandputrop(P2(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P2(pdst), rop);
                                        getandputrop(P3(psrc), (sx & 0x1f),
                                            (dx & 0x1f), nstart, P3(pdst), rop);
                                }

                                pdstLine += width;
                                psrcLine += width;
                        }
                }
        }

        return (0);
}