/*      $NetBSD: rasops1.c,v 1.37 2019/08/10 01:24:17 rin 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rasops1.c,v 1.37 2019/08/10 01:24:17 rin Exp $");

#ifdef _KERNEL_OPT
#include "opt_rasops.h"
#endif

#include <sys/param.h>

#include <machine/endian.h>

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

#define _RASOPS_PRIVATE
#define RASOPS_DEPTH    1
#include <dev/rasops/rasops.h>
#include <dev/rasops/rasops_masks.h>

static void     rasops1_copycols(void *, int, int, int, int);
static void     rasops1_erasecols(void *, int, int, int, long);
static void     rasops1_do_cursor(struct rasops_info *);
static void     rasops1_putchar(void *, int, int col, u_int, long);
#ifndef RASOPS_SMALL
static void     rasops1_putchar8(void *, int, int col, u_int, long);
static void     rasops1_putchar16(void *, int, int col, u_int, long);
#endif

/*
 * Initialize rasops_info struct for this colordepth.
 */
void
rasops1_init(struct rasops_info *ri)
{

        if ((ri->ri_font->fontwidth & 7) != 0) {
                ri->ri_ops.erasecols = rasops1_erasecols;
                ri->ri_ops.copycols = rasops1_copycols;
                ri->ri_do_cursor = rasops1_do_cursor;
        }

        switch (ri->ri_font->fontwidth) {
#ifndef RASOPS_SMALL
        case 8:
                ri->ri_ops.putchar = rasops1_putchar8;
                break;
        case 16:
                ri->ri_ops.putchar = rasops1_putchar16;
                break;
#endif
        default:
                ri->ri_ops.putchar = rasops1_putchar;
                break;
        }
}

/*
 * Paint a single character. This is the generic version, this is ugly.
 */
static void
rasops1_putchar(void *cookie, int row, int col, u_int uc, long attr)
{
        struct rasops_info *ri = (struct rasops_info *)cookie;
        struct wsdisplay_font *font = PICK_FONT(ri, uc);
        int height, width;
        uint32_t bg, fg, lbg, rbg, fb, lmask, rmask, tmp, tmp0, tmp1;
        uint32_t *rp, *hp;
        uint8_t *fr;
        bool space;

        hp = NULL;      /* XXX GCC */

        if (__predict_false(!CHAR_IN_FONT(uc, font)))
                return;

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

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

        height = font->fontheight;
        width = font->fontwidth;
        col *= width;

        rp = (uint32_t *)(ri->ri_bits + row * ri->ri_yscale +
            ((col >> 3) & ~3));
        if (ri->ri_hwbits)
                hp = (uint32_t *)(ri->ri_hwbits + row * ri->ri_yscale +
                    ((col >> 3) & ~3));

        col &= 31;

        bg = ATTR_BG(ri, attr);
        fg = ATTR_FG(ri, attr);

        /* If fg and bg match this becomes a space character */
        if (uc == ' ' || __predict_false(fg == bg)) {
                space = true;
                fr = NULL;      /* XXX GCC */
        } else {
                space = false;
                fr = FONT_GLYPH(uc, font, ri);
        }

        if (col + width <= 32) {
                /* Single word, only one mask */
                rmask = rasops_pmask[col][width & 31];
                lmask = ~rmask;

                if (space) {
                        bg &= rmask;
                        while (height--) {
                                tmp = (*rp & lmask) | bg;
                                *rp = tmp;
                                if (ri->ri_hwbits) {
                                        *hp = tmp;
                                        DELTA(hp, ri->ri_stride, uint32_t *);
                                }
                                DELTA(rp, ri->ri_stride, uint32_t *);
                        }
                } else {
                        while (height--) {
                                fb = rasops_be32uatoh(fr);
                                fr += font->stride;
                                if (bg)
                                        fb = ~fb;

                                tmp = *rp & lmask;
                                tmp |= (MBE(fb >> col) & rmask);
                                *rp = tmp;

                                if (ri->ri_hwbits) {
                                        *hp = tmp;
                                        DELTA(hp, ri->ri_stride, uint32_t *);
                                }

                                DELTA(rp, ri->ri_stride, uint32_t *);
                        }
                }

                /* Do underline */
                if ((attr & WSATTR_UNDERLINE) != 0) {
                        DELTA(rp, - ri->ri_stride * ri->ri_ul.off, uint32_t *);
                        if (ri->ri_hwbits)
                                DELTA(hp, - ri->ri_stride * ri->ri_ul.off,
                                    uint32_t *);

                        for (height = ri->ri_ul.height; height; height--) {
                                DELTA(rp, - ri->ri_stride, uint32_t *);
                                tmp = (*rp & lmask) | (fg & rmask);
                                *rp = tmp;
                                if (ri->ri_hwbits) {
                                        DELTA(hp, - ri->ri_stride, uint32_t *);
                                        *hp = tmp;
                                }
                        }
                }
        } else {
                /* Word boundary, two masks needed */
                lmask = ~rasops_lmask[col];
                rmask = ~rasops_rmask[(col + width) & 31];

                if (space) {
                        lbg = bg & ~lmask;
                        rbg = bg & ~rmask;

                        while (height--) {
                                tmp0 = (rp[0] & lmask) | lbg;
                                tmp1 = (rp[1] & rmask) | rbg;

                                rp[0] = tmp0;
                                rp[1] = tmp1;

                                if (ri->ri_hwbits) {
                                        hp[0] = tmp0;
                                        hp[1] = tmp1;
                                        DELTA(hp, ri->ri_stride, uint32_t *);
                                }

                                DELTA(rp, ri->ri_stride, uint32_t *);
                        }
                } else {
                        width = 32 - col;

                        while (height--) {
                                fb = rasops_be32uatoh(fr);
                                fr += font->stride;
                                if (bg)
                                        fb = ~fb;

                                tmp0 = rp[0] & lmask;
                                tmp0 |= MBE(fb >> col);

                                tmp1 = rp[1] & rmask;
                                tmp1 |= (MBE(fb << width) & ~rmask);

                                rp[0] = tmp0;
                                rp[1] = tmp1;

                                if (ri->ri_hwbits) {
                                        hp[0] = tmp0;
                                        hp[1] = tmp1;
                                        DELTA(hp, ri->ri_stride, uint32_t *);
                                }

                                DELTA(rp, ri->ri_stride, uint32_t *);
                        }
                }

                /* Do underline */
                if ((attr & WSATTR_UNDERLINE) != 0) {
                        DELTA(rp, - ri->ri_stride * ri->ri_ul.off, uint32_t *);
                        if (ri->ri_hwbits)
                                DELTA(hp, - ri->ri_stride * ri->ri_ul.off,
                                    uint32_t *);

                        for (height = ri->ri_ul.height; height; height--) {
                                DELTA(rp, - ri->ri_stride, uint32_t *);
                                tmp0 = (rp[0] & lmask) | (fg & ~lmask);
                                tmp1 = (rp[1] & rmask) | (fg & ~rmask);
                                rp[0] = tmp0;
                                rp[1] = tmp1;
                                if (ri->ri_hwbits) {
                                        DELTA(hp, - ri->ri_stride, uint32_t *);
                                        hp[0] = tmp0;
                                        hp[1] = tmp1;
                                }
                        }
                }
        }
}

#ifndef RASOPS_SMALL
/*
 * Width-optimized putchar functions
 */
#define RASOPS_WIDTH    8
#include <dev/rasops/rasops1_putchar_width.h>
#undef  RASOPS_WIDTH

#define RASOPS_WIDTH    16
#include <dev/rasops/rasops1_putchar_width.h>
#undef  RASOPS_WIDTH

#endif  /* !RASOPS_SMALL */

/*
 * Grab routines common to depths where (bpp < 8)
 */
#include <dev/rasops/rasops_bitops.h>