hw/display/blizzard_template.h

   1 /*
   2  * QEMU Epson S1D13744/S1D13745 templates
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Written by Andrzej Zaborowski <andrew@openedhand.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 or
  10  * (at your option) version 3 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #define SKIP_PIXEL(to)          to += deststep
  22 #if DEPTH == 8
  23 # define PIXEL_TYPE             uint8_t
  24 # define COPY_PIXEL(to, from)   *to = from; SKIP_PIXEL(to)
  25 # define COPY_PIXEL1(to, from)  *to ++ = from
  26 #elif DEPTH == 15 || DEPTH == 16
  27 # define PIXEL_TYPE             uint16_t
  28 # define COPY_PIXEL(to, from)   *to = from; SKIP_PIXEL(to)
  29 # define COPY_PIXEL1(to, from)  *to ++ = from
  30 #elif DEPTH == 24
  31 # define PIXEL_TYPE             uint8_t
  32 # define COPY_PIXEL(to, from)   \
  33     to[0] = from; to[1] = (from) >> 8; to[2] = (from) >> 16; SKIP_PIXEL(to)
  34 # define COPY_PIXEL1(to, from)  \
  35     *to ++ = from; *to ++ = (from) >> 8; *to ++ = (from) >> 16
  36 #elif DEPTH == 32
  37 # define PIXEL_TYPE             uint32_t
  38 # define COPY_PIXEL(to, from)   *to = from; SKIP_PIXEL(to)
  39 # define COPY_PIXEL1(to, from)  *to ++ = from
  40 #else
  41 # error unknown bit depth
  42 #endif
  43
  44 #ifdef HOST_WORDS_BIGENDIAN
  45 # define SWAP_WORDS     1
  46 #endif
  47
  48 static void glue(blizzard_draw_line16_, DEPTH)(PIXEL_TYPE *dest,
  49                 const uint16_t *src, unsigned int width)
  50 {
  51 #if !defined(SWAP_WORDS) && DEPTH == 16
  52     memcpy(dest, src, width);
  53 #else
  54     uint16_t data;
  55     unsigned int r, g, b;
  56     const uint16_t *end = (const void *) src + width;
  57     while (src < end) {
  58         data = *src ++;
  59         b = (data & 0x1f) << 3;
  60         data >>= 5;
  61         g = (data & 0x3f) << 2;
  62         data >>= 6;
  63         r = (data & 0x1f) << 3;
  64         data >>= 5;
  65         COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));
  66     }
  67 #endif
  68 }
  69
  70 static void glue(blizzard_draw_line24mode1_, DEPTH)(PIXEL_TYPE *dest,
  71                 const uint8_t *src, unsigned int width)
  72 {
  73     /* TODO: check if SDL 24-bit planes are not in the same format and
  74      * if so, use memcpy */
  75     unsigned int r[2], g[2], b[2];
  76     const uint8_t *end = src + width;
  77     while (src < end) {
  78         g[0] = *src ++;
  79         r[0] = *src ++;
  80         r[1] = *src ++;
  81         b[0] = *src ++;
  82         COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[0], g[0], b[0]));
  83         b[1] = *src ++;
  84         g[1] = *src ++;
  85         COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r[1], g[1], b[1]));
  86     }
  87 }
  88
  89 static void glue(blizzard_draw_line24mode2_, DEPTH)(PIXEL_TYPE *dest,
  90                 const uint8_t *src, unsigned int width)
  91 {
  92     unsigned int r, g, b;
  93     const uint8_t *end = src + width;
  94     while (src < end) {
  95         r = *src ++;
  96         src ++;
  97         b = *src ++;
  98         g = *src ++;
  99         COPY_PIXEL1(dest, glue(rgb_to_pixel, DEPTH)(r, g, b));
 100     }
 101 }
 102
 103 /* No rotation */
 104 static blizzard_fn_t glue(blizzard_draw_fn_, DEPTH)[0x10] = {
 105     NULL,
 106     /* RGB 5:6:5*/
 107     (blizzard_fn_t) glue(blizzard_draw_line16_, DEPTH),
 108     /* RGB 6:6:6 mode 1 */
 109     (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),
 110     /* RGB 8:8:8 mode 1 */
 111     (blizzard_fn_t) glue(blizzard_draw_line24mode1_, DEPTH),
 112     NULL, NULL,
 113     /* RGB 6:6:6 mode 2 */
 114     (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),
 115     /* RGB 8:8:8 mode 2 */
 116     (blizzard_fn_t) glue(blizzard_draw_line24mode2_, DEPTH),
 117     /* YUV 4:2:2 */
 118     NULL,
 119     /* YUV 4:2:0 */
 120     NULL,
 121     NULL, NULL, NULL, NULL, NULL, NULL,
 122 };
 123
 124 /* 90deg, 180deg and 270deg rotation */
 125 static blizzard_fn_t glue(blizzard_draw_fn_r_, DEPTH)[0x10] = {
 126     /* TODO */
 127     [0 ... 0xf] = NULL,
 128 };
 129
 130 #undef DEPTH
 131 #undef SKIP_PIXEL
 132 #undef COPY_PIXEL
 133 #undef COPY_PIXEL1
 134 #undef PIXEL_TYPE
 135
 136 #undef SWAP_WORDS