/* $NetBSD: rasops_putchar.h,v 1.9 2025/11/02 22:16:24 nia Exp $ */

/* NetBSD: rasops8.c,v 1.41 2019/07/25 03:02:44 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.
 */

#if RASOPS_DEPTH != 8 && RASOPS_DEPTH != 15 && RASOPS_DEPTH != 24 && \
    RASOPS_DEPTH != 32
#error "Depth not supported"
#endif

#if   RASOPS_DEPTH == 8
#define COLOR_TYPE              uint8_t
#elif RASOPS_DEPTH ==  15
#define COLOR_TYPE              uint16_t
#else
#define COLOR_TYPE              uint32_t
#endif

#if RASOPS_DEPTH != 24
#define PIXEL_TYPE              COLOR_TYPE
#define PIXEL_BYTES             sizeof(PIXEL_TYPE)
#define SET_COLOR(p, index)     *(p)++ = clr[index]
#define SET_RGB(p, r, g, b)                                             \
        *(p)++ = (((r) >> (8 - ri->ri_rnum)) << ri->ri_rpos) |          \
                 (((g) >> (8 - ri->ri_gnum)) << ri->ri_gpos) |          \
                 (((b) >> (8 - ri->ri_bnum)) << ri->ri_bpos)
#endif

#if RASOPS_DEPTH == 24
#define PIXEL_TYPE              uint8_t
#define PIXEL_BYTES             3
#define SET_COLOR(p, index)                                             \
        do {                                                            \
                COLOR_TYPE c = clr[index];                              \
                *(p)++ = c >> 16;                                       \
                *(p)++ = c >> 8;                                        \
                *(p)++ = c;                                             \
        } while (0 /* CONSTCOND */)
#define SET_RGB(p, r, g, b)                                             \
        do {                                                            \
                (p)[R_OFF] = (r);                                       \
                (p)[G_OFF] = (g);                                       \
                (p)[B_OFF] = (b);                                       \
                (p) += 3;                                               \
        } while (0 /* CONSTCOND */)
#endif

#define AV(p, w)        (((w) * (p)[1] + (0xff - (w)) * (p)[0]) >> 8)

#if BYTE_ORDER == LITTLE_ENDIAN
#define R_OFF   (ri->ri_rpos / 8)
#define G_OFF   (ri->ri_gpos / 8)
#define B_OFF   (ri->ri_bpos / 8)
#else /* BIG_ENDIAN XXX not tested */
#define R_OFF   (2 - ri->ri_rpos / 8)
#define G_OFF   (2 - ri->ri_gpos / 8)
#define B_OFF   (2 - ri->ri_bpos / 8)
#endif

#define NAME(depth)     NAME1(depth)
#ifndef RASOPS_AA
#define NAME1(depth)    rasops ## depth ## _putchar
#else
#define NAME1(depth)    rasops ## depth ## _putchar_aa
#endif

/*
 * Put a single character.
 */
static void
NAME(RASOPS_DEPTH)(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, cnt;
        uint8_t *fr;
        COLOR_TYPE clr[2];
        PIXEL_TYPE *dp, *rp, *hp;

        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;

        rp = (PIXEL_TYPE *)(ri->ri_bits + FBOFFSET(ri, row, col));
        if (ri->ri_hwbits)
                hp = (PIXEL_TYPE *)(ri->ri_hwbits + FBOFFSET(ri, row, col));

        clr[0] = (COLOR_TYPE)ATTR_BG(ri, attr);
        clr[1] = (COLOR_TYPE)ATTR_FG(ri, attr);

        if (uc == ' ') {
                while (height--) {
                        dp = rp;
                        for (cnt = width; cnt; cnt--)
                                SET_COLOR(dp, 0);
                        if (ri->ri_hwbits) {
                                uint16_t bytes = width * PIXEL_BYTES;
                                        /* XXX GCC */
                                memcpy(hp, rp, bytes);
                                DELTA(hp, ri->ri_stride, PIXEL_TYPE *);
                        }
                        DELTA(rp, ri->ri_stride, PIXEL_TYPE *);
                }
        } else {
                fr = FONT_GLYPH(uc, font, ri);

#ifdef RASOPS_AA
                int off[2];
                uint8_t r[2], g[2], b[2];

                /*
                 * This is independent to positions/lengths of RGB in pixel.
                 */
                off[0] = (((uint32_t)attr >> 16) & 0xff) * 3;
                off[1] = (((uint32_t)attr >> 24) & 0xff) * 3;

                if (ri->ri_caps & WSSCREEN_256COL) {
                        r[0] = rasops_ecmap[off[0]];
                        r[1] = rasops_ecmap[off[1]];
                        g[0] = rasops_ecmap[off[0] + 1];
                        g[1] = rasops_ecmap[off[1] + 1];
                        b[0] = rasops_ecmap[off[0] + 2];
                        b[1] = rasops_ecmap[off[1] + 2];
                } else {
                        r[0] = rasops_cmap[off[0]];
                        r[1] = rasops_cmap[off[1]];
                        g[0] = rasops_cmap[off[0] + 1];
                        g[1] = rasops_cmap[off[1] + 1];
                        b[0] = rasops_cmap[off[0] + 2];
                        b[1] = rasops_cmap[off[1] + 2];
                }
#endif

                while (height--) {
                        dp = rp;

#ifndef RASOPS_AA
                        uint32_t fb = rasops_be32uatoh(fr);
                        fr += ri->ri_font->stride;

                        for (cnt = width; cnt; cnt--) {
                                SET_COLOR(dp, (fb >> 31) & 1);
                                fb <<= 1;
                        }
#else /* RASOPS_AA */
                        for (cnt = width; cnt; cnt--) {
                                int w = *fr++;
                                if (w == 0xff)
                                        SET_COLOR(dp, 1);
                                else if (w == 0)
                                        SET_COLOR(dp, 0);
                                else
                                        SET_RGB(dp,
                                            AV(r, w), AV(g, w), AV(b, w));
                        }
#endif
                        if (ri->ri_hwbits) {
                                uint16_t bytes = width * PIXEL_BYTES;
                                        /* XXX GCC */
                                memcpy(hp, rp, bytes);
                                DELTA(hp, ri->ri_stride, PIXEL_TYPE *);
                        }
                        DELTA(rp, ri->ri_stride, PIXEL_TYPE *);
                }
        }

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

                for (height = ri->ri_ul.height; height; height--) {
                        DELTA(rp, - ri->ri_stride, PIXEL_TYPE *);
                        dp = rp;
                        for (cnt = width; cnt; cnt--)
                                SET_COLOR(dp, 1);
                        if (ri->ri_hwbits) {
                                DELTA(hp, - ri->ri_stride, PIXEL_TYPE *);
                                uint16_t bytes = width * PIXEL_BYTES;
                                        /* XXX GCC */
                                memcpy(hp, rp, bytes);
                        }
                }
        }
}

#undef  COLOR_TYPE

#undef  PIXEL_TYPE
#undef  PIXEL_BYTES
#undef  SET_COLOR
#undef  SET_RGB

#undef  AV

#undef  R_OFF
#undef  G_OFF
#undef  B_OFF

#undef  NAME
#undef  NAME1