Archipelago » qemu

/*

 * QEMU Epson S1D13744/S1D13745 templates

 *

 * Copyright (C) 2008 Nokia Corporation

 * Written by Andrzej Zaborowski <andrew@openedhand.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 or

 * (at your option) version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#define SKIP_PIXEL(to)         (to += deststep)

#if DEPTH == 8

# define PIXEL_TYPE            uint8_t

# define COPY_PIXEL(to, from)  do { *to = from; SKIP_PIXEL(to); } while (0)

# define COPY_PIXEL1(to, from) (*to++ = from)

#elif DEPTH == 15 || DEPTH == 16

# define PIXEL_TYPE            uint16_t

# define COPY_PIXEL(to, from)  do { *to = from; SKIP_PIXEL(to); } while (0)

# define COPY_PIXEL1(to, from) (*to++ = from)

#elif DEPTH == 24

# define PIXEL_TYPE            uint8_t

# define COPY_PIXEL(to, from) \

    do {                      \

        to[0] = from;         \

        to[1] = (from) >> 8;  \

        to[2] = (from) >> 16; \

        SKIP_PIXEL(to);       \

    } while (0)

# define COPY_PIXEL1(to, from) \

    do {                       \

        *to++ = from;          \

        *to++ = (from) >> 8;   \

        *to++ = (from) >> 16;  \

    } while (0)

#elif DEPTH == 32

# define PIXEL_TYPE            uint32_t

# define COPY_PIXEL(to, from)  do { *to = from; SKIP_PIXEL(to); } while (0)

# define COPY_PIXEL1(to, from) (*to++ = from)

#else

# error unknown bit depth

#endif

#ifdef HOST_WORDS_BIGENDIAN

# define SWAP_WORDS        1

#endif

static void glue(blizzard_draw_line16_, DEPTH)(PIXEL_TYPE *dest,

                const uint16_t *src, unsigned int width)

{

#if !defined(SWAP_WORDS) && DEPTH == 16

    memcpy(dest, src, width);

#else

    uint16_t data;

    unsigned int r, g, b;

    const uint16_t *end = (const void *) src + width;

    while (src < end) {

        data = *src ++;

        b = (data & 0x1f) << 3;

        data >>= 5;

        g = (data & 0x3f) << 2;

        data >>= 6;

        r = (data & 0x1f) << 3;

        data >>= 5;

        COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));

    }

#endif

}

static void glue(blizzard_draw_line24mode1_, DEPTH)(PIXEL_TYPE *dest,

                const uint8_t *src, unsigned int width)

{

    /* TODO: check if SDL 24-bit planes are not in the same format and

     * if so, use memcpy */

    unsigned int r[2], g[2], b[2];

    const uint8_t *end = src + width;

    while (src < end) {

        g[0] = *src ++;

        r[0] = *src ++;

        r[1] = *src ++;

        b[0] = *src ++;

        COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[0], g[0], b[0]));

        b[1] = *src ++;

        g[1] = *src ++;

        COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[1], g[1], b[1]));

    }

}

static void glue(blizzard_draw_line24mode2_, DEPTH)(PIXEL_TYPE *dest,

                const uint8_t *src, unsigned int width)

{

    unsigned int r, g, b;

    const uint8_t *end = src + width;

    while (src < end) {

        r = *src ++;

        src ++;

        b = *src ++;

        g = *src ++;

        COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));

    }

}

/* No rotation */

static blizzard_fn_t glue(blizzard_draw_fn_, DEPTH)[0x10] = {

    NULL,

    /* RGB 5:6:5*/

    (blizzard_fn_t) glue(blizzard_draw_line16_, DEPTH),

    /* RGB 6:6:6 mode 1 */

    (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),

    /* RGB 8:8:8 mode 1 */

    (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),

    NULL, NULL,

    /* RGB 6:6:6 mode 2 */

    (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),

    /* RGB 8:8:8 mode 2 */

    (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),

    /* YUV 4:2:2 */

    NULL,

    /* YUV 4:2:0 */

    NULL,

    NULL, NULL, NULL, NULL, NULL, NULL,

};

/* 90deg, 180deg and 270deg rotation */

static blizzard_fn_t glue(blizzard_draw_fn_r_, DEPTH)[0x10] = {

    /* TODO */

    [0 ... 0xf] = NULL,

};

#undef DEPTH

#undef SKIP_PIXEL

#undef COPY_PIXEL

#undef COPY_PIXEL1

#undef PIXEL_TYPE

#undef SWAP_WORDS