text: /*
   * 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
  