/*      $OpenBSD: rasops4.c,v 1.13 2023/01/18 11:08:49 nicm Exp $       */
/*      $NetBSD: rasops4.c,v 1.4 2001/11/15 09:48:15 lukem Exp $        */

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Doran.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

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

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

int     rasops4_copycols(void *, int, int, int, int);
int     rasops4_erasecols(void *, int, int, int, uint32_t);
int     rasops4_do_cursor(struct rasops_info *);
int     rasops4_putchar(void *, int, int col, u_int, uint32_t);
#ifndef RASOPS_SMALL
int     rasops4_putchar8(void *, int, int col, u_int, uint32_t);
int     rasops4_putchar12(void *, int, int col, u_int, uint32_t);
int     rasops4_putchar16(void *, int, int col, u_int, uint32_t);
void    rasops4_makestamp(struct rasops_info *, uint32_t);

/*
 * 4x1 stamp for optimized character blitting
 */
static u_int16_t        stamp[16];
static uint32_t stamp_attr;
static int      stamp_mutex;    /* XXX see note in README */
#endif

/*
 * Initialize rasops_info struct for this colordepth.
 */
void
rasops4_init(struct rasops_info *ri)
{
        rasops_masks_init();

        switch (ri->ri_font->fontwidth) {
#ifndef RASOPS_SMALL
        case 8:
                ri->ri_ops.putchar = rasops4_putchar8;
                break;
        case 12:
                ri->ri_ops.putchar = rasops4_putchar12;
                break;
        case 16:
                ri->ri_ops.putchar = rasops4_putchar16;
                break;
#endif  /* !RASOPS_SMALL */
        default:
                panic("fontwidth not 8/12/16 or RASOPS_SMALL - fixme!");
                ri->ri_ops.putchar = rasops4_putchar;
                break;
        }

        if ((ri->ri_font->fontwidth & 1) != 0) {
                ri->ri_ops.erasecols = rasops4_erasecols;
                ri->ri_ops.copycols = rasops4_copycols;
                ri->ri_do_cursor = rasops4_do_cursor;
        }
}

#ifdef notyet
/*
 * Paint a single character. This is the generic version, this is ugly.
 */
int
rasops4_putchar(void *cookie, int row, int col, u_int uc, uint32_t attr)
{
        int height, width, fs, rs, fb, bg, fg, lmask, rmask;
        struct rasops_info *ri;
        int32_t *rp;
        u_char *fr;

        ri = (struct rasops_info *)cookie;

#ifdef RASOPS_CLIPPING
        /* Catches 'row < 0' case too */
        if ((unsigned)row >= (unsigned)ri->ri_rows)
                return 0;

        if ((unsigned)col >= (unsigned)ri->ri_cols)
                return 0;
#endif

        width = ri->ri_font->fontwidth << 1;
        height = ri->ri_font->fontheight;
        col *= width;
        rp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale + ((col >> 3) & ~3));
        col = col & 31;
        rs = ri->ri_stride;

        bg = ri->ri_devcmap[(attr >> 16) & 0xf];
        fg = ri->ri_devcmap[(attr >> 24) & 0xf];

        /* If fg and bg match this becomes a space character */
        if (fg == bg || uc == ' ') {
                uc = (u_int)-1;
                fr = 0;         /* shutup gcc */
                fs = 0;         /* shutup gcc */
        } else {
                uc -= ri->ri_font->firstchar;
                fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
                fs = ri->ri_font->stride;
        }

        /* Single word, one mask */
        if ((col + width) <= 32) {
                rmask = rasops_pmask[col][width];
                lmask = ~rmask;

                if (uc == (u_int)-1) {
                        bg &= rmask;

                        while (height--) {
                                *rp = (*rp & lmask) | bg;
                                DELTA(rp, rs, int32_t *);
                        }
                } else {
                        while (height--) {
                                /* get bits, mask */
                                /* compose sl */
                                /* mask sl */
                                /* put word */
                        }
                }

                /* Do underline */
                if (attr & WSATTR_UNDERLINE) {
                        DELTA(rp, -(ri->ri_stride << 1), int32_t *);
                        *rp = (*rp & lmask) | (fg & rmask);
                }
        } else {
                lmask = ~rasops_lmask[col];
                rmask = ~rasops_rmask[(col + width) & 31];

                if (uc == (u_int)-1) {
                        bg = bg & ~lmask;
                        width = bg & ~rmask;

                        while (height--) {
                                rp[0] = (rp[0] & lmask) | bg;
                                rp[1] = (rp[1] & rmask) | width;
                                DELTA(rp, rs, int32_t *);
                        }
                } else {
                        width = 32 - col;

                        /* NOT fontbits if bg is white */
                        while (height--) {
                                fb = ~(fr[3] | (fr[2] << 8) |
                                    (fr[1] << 16) | (fr[0] << 24));

                                rp[0] = (rp[0] & lmask)
                                    | MBE((u_int)fb >> col);

                                rp[1] = (rp[1] & rmask)
                                   | (MBE((u_int)fb << width) & ~rmask);

                                fr += fs;
                                DELTA(rp, rs, int32_t *);
                        }
                }

                /* Do underline */
                if (attr & WSATTR_UNDERLINE) {
                        DELTA(rp, -(ri->ri_stride << 1), int32_t *);
                        rp[0] = (rp[0] & lmask) | (fg & ~lmask);
                        rp[1] = (rp[1] & rmask) | (fg & ~rmask);
                }
        }

        return 0;
}
#endif

/*
 * Put a single character. This is the generic version.
 */
int
rasops4_putchar(void *cookie, int row, int col, u_int uc, uint32_t attr)
{

        /* XXX punt */
        return (EAGAIN);
}

#ifndef RASOPS_SMALL
/*
 * Recompute the blitting stamp.
 */
void
rasops4_makestamp(struct rasops_info *ri, uint32_t attr)
{
        int i, fg, bg;

        fg = ri->ri_devcmap[(attr >> 24) & 0xf] & 0xf;
        bg = ri->ri_devcmap[(attr >> 16) & 0xf] & 0xf;
        stamp_attr = attr;

        for (i = 0; i < 16; i++) {
#if BYTE_ORDER == LITTLE_ENDIAN
                stamp[i] =  (i & 1 ? fg : bg) << 8;
                stamp[i] |= (i & 2 ? fg : bg) << 12;
                stamp[i] |= (i & 4 ? fg : bg) << 0;
                stamp[i] |= (i & 8 ? fg : bg) << 4;
#else
                stamp[i] =  (i & 1 ? fg : bg) << 0;
                stamp[i] |= (i & 2 ? fg : bg) << 4;
                stamp[i] |= (i & 4 ? fg : bg) << 8;
                stamp[i] |= (i & 8 ? fg : bg) << 12;
#endif
        }
}

/*
 * Put a single character. This is for 8-pixel wide fonts.
 */
int
rasops4_putchar8(void *cookie, int row, int col, u_int uc, uint32_t attr)
{
        struct rasops_info *ri;
        int height, fs, rs;
        u_char *fr;
        u_int16_t *rp;

        /* Can't risk remaking the stamp if it's already in use */
        if (stamp_mutex++) {
                stamp_mutex--;
                return rasops4_putchar(cookie, row, col, uc, attr);
        }

        ri = (struct rasops_info *)cookie;

#ifdef RASOPS_CLIPPING
        /* Catches 'row < 0' case too */
        if ((unsigned)row >= (unsigned)ri->ri_rows) {
                stamp_mutex--;
                return 0;
        }

        if ((unsigned)col >= (unsigned)ri->ri_cols) {
                stamp_mutex--;
                return 0;
        }
#endif

        rp = (u_int16_t *)(ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale);
        height = ri->ri_font->fontheight;
        rs = ri->ri_stride / sizeof(*rp);

        /* Recompute stamp? */
        if (attr != stamp_attr)
                rasops4_makestamp(ri, attr);

        if (uc == ' ') {
                u_int16_t c = stamp[0];
                while (height--) {
                        rp[0] = c;
                        rp[1] = c;
                        rp += rs;
                }
        } else {
                uc -= ri->ri_font->firstchar;
                fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
                fs = ri->ri_font->stride;

                while (height--) {
                        rp[0] = stamp[(*fr >> 4) & 0xf];
                        rp[1] = stamp[*fr & 0xf];
                        fr += fs;
                        rp += rs;
                }
        }

        /* Do underline */
        if ((attr & WSATTR_UNDERLINE) != 0) {
                rp -= (rs << 1);
                rp[0] = stamp[15];
                rp[1] = stamp[15];
        }

        stamp_mutex--;

        return 0;
}

/*
 * Put a single character. This is for 12-pixel wide fonts.
 */
int
rasops4_putchar12(void *cookie, int row, int col, u_int uc, uint32_t attr)
{
        struct rasops_info *ri;
        int height, fs, rs;
        u_char *fr;
        u_int16_t *rp;

        /* Can't risk remaking the stamp if it's already in use */
        if (stamp_mutex++) {
                stamp_mutex--;
                return rasops4_putchar(cookie, row, col, uc, attr);
        }

        ri = (struct rasops_info *)cookie;

#ifdef RASOPS_CLIPPING
        /* Catches 'row < 0' case too */
        if ((unsigned)row >= (unsigned)ri->ri_rows) {
                stamp_mutex--;
                return 0;
        }

        if ((unsigned)col >= (unsigned)ri->ri_cols) {
                stamp_mutex--;
                return 0;
        }
#endif

        rp = (u_int16_t *)(ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale);
        height = ri->ri_font->fontheight;
        rs = ri->ri_stride / sizeof(*rp);

        /* Recompute stamp? */
        if (attr != stamp_attr)
                rasops4_makestamp(ri, attr);

        if (uc == ' ') {
                u_int16_t c = stamp[0];
                while (height--) {
                        rp[0] = c;
                        rp[1] = c;
                        rp[2] = c;
                        rp += rs;
                }
        } else {
                uc -= ri->ri_font->firstchar;
                fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
                fs = ri->ri_font->stride;

                while (height--) {
                        rp[0] = stamp[(fr[0] >> 4) & 0xf];
                        rp[1] = stamp[fr[0] & 0xf];
                        rp[2] = stamp[(fr[1] >> 4) & 0xf];
                        fr += fs;
                        rp += rs;
                }
        }

        /* Do underline */
        if ((attr & WSATTR_UNDERLINE) != 0) {
                rp -= (rs << 1);
                rp[0] = stamp[15];
                rp[1] = stamp[15];
                rp[2] = stamp[15];
        }

        stamp_mutex--;

        return 0;
}

/*
 * Put a single character. This is for 16-pixel wide fonts.
 */
int
rasops4_putchar16(void *cookie, int row, int col, u_int uc, uint32_t attr)
{
        struct rasops_info *ri;
        int height, fs, rs;
        u_char *fr;
        u_int16_t *rp;

        /* Can't risk remaking the stamp if it's already in use */
        if (stamp_mutex++) {
                stamp_mutex--;
                return rasops4_putchar(cookie, row, col, uc, attr);
        }

        ri = (struct rasops_info *)cookie;

#ifdef RASOPS_CLIPPING
        /* Catches 'row < 0' case too */
        if ((unsigned)row >= (unsigned)ri->ri_rows) {
                stamp_mutex--;
                return 0;
        }

        if ((unsigned)col >= (unsigned)ri->ri_cols) {
                stamp_mutex--;
                return 0;
        }
#endif

        rp = (u_int16_t *)(ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale);
        height = ri->ri_font->fontheight;
        rs = ri->ri_stride / sizeof(*rp);

        /* Recompute stamp? */
        if (attr != stamp_attr)
                rasops4_makestamp(ri, attr);

        if (uc == ' ') {
                u_int16_t c = stamp[0];
                while (height--) {
                        rp[0] = c;
                        rp[1] = c;
                        rp[2] = c;
                        rp[3] = c;
                        rp += rs;
                }
        } else {
                uc -= ri->ri_font->firstchar;
                fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
                fs = ri->ri_font->stride;

                while (height--) {
                        rp[0] = stamp[(fr[0] >> 4) & 0xf];
                        rp[1] = stamp[fr[0] & 0xf];
                        rp[2] = stamp[(fr[1] >> 4) & 0xf];
                        rp[3] = stamp[fr[1] & 0xf];
                        fr += fs;
                        rp += rs;
                }
        }

        /* Do underline */
        if ((attr & WSATTR_UNDERLINE) != 0) {
                rp -= (rs << 1);
                rp[0] = stamp[15];
                rp[1] = stamp[15];
                rp[2] = stamp[15];
                rp[3] = stamp[15];
        }

        stamp_mutex--;

        return 0;
}
#endif  /* !RASOPS_SMALL */

/*
 * Grab routines common to depths where (bpp < 8)
 */
#define NAME(ident)     rasops4_##ident
#define PIXEL_SHIFT     2

#include <dev/rasops/rasops_bitops.h>