hw/display/omap_lcd_template.h

   1 /*
   2  * QEMU OMAP LCD Emulator templates
   3  *
   4  * Copyright (c) 2006 Andrzej Zaborowski  <balrog@zabor.org>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  19  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  25  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #if DEPTH == 8
  31 # define BPP 1
  32 # define PIXEL_TYPE uint8_t
  33 #elif DEPTH == 15 || DEPTH == 16
  34 # define BPP 2
  35 # define PIXEL_TYPE uint16_t
  36 #elif DEPTH == 32
  37 # define BPP 4
  38 # define PIXEL_TYPE uint32_t
  39 #else
  40 # error unsupport depth
  41 #endif
  42
  43 /*
  44  * 2-bit colour
  45  */
  46 static void glue(draw_line2_, DEPTH)(void *opaque,
  47                 uint8_t *d, const uint8_t *s, int width, int deststep)
  48 {
  49     uint16_t *pal = opaque;
  50     uint8_t v, r, g, b;
  51
  52     do {
  53         v = ldub_p((void *) s);
  54         r = (pal[v & 3] >> 4) & 0xf0;
  55         g = pal[v & 3] & 0xf0;
  56         b = (pal[v & 3] << 4) & 0xf0;
  57         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
  58         d += BPP;
  59         v >>= 2;
  60         r = (pal[v & 3] >> 4) & 0xf0;
  61         g = pal[v & 3] & 0xf0;
  62         b = (pal[v & 3] << 4) & 0xf0;
  63         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
  64         d += BPP;
  65         v >>= 2;
  66         r = (pal[v & 3] >> 4) & 0xf0;
  67         g = pal[v & 3] & 0xf0;
  68         b = (pal[v & 3] << 4) & 0xf0;
  69         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
  70         d += BPP;
  71         v >>= 2;
  72         r = (pal[v & 3] >> 4) & 0xf0;
  73         g = pal[v & 3] & 0xf0;
  74         b = (pal[v & 3] << 4) & 0xf0;
  75         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
  76         d += BPP;
  77         s ++;
  78         width -= 4;
  79     } while (width > 0);
  80 }
  81
  82 /*
  83  * 4-bit colour
  84  */
  85 static void glue(draw_line4_, DEPTH)(void *opaque,
  86                 uint8_t *d, const uint8_t *s, int width, int deststep)
  87 {
  88     uint16_t *pal = opaque;
  89     uint8_t v, r, g, b;
  90
  91     do {
  92         v = ldub_p((void *) s);
  93         r = (pal[v & 0xf] >> 4) & 0xf0;
  94         g = pal[v & 0xf] & 0xf0;
  95         b = (pal[v & 0xf] << 4) & 0xf0;
  96         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
  97         d += BPP;
  98         v >>= 4;
  99         r = (pal[v & 0xf] >> 4) & 0xf0;
 100         g = pal[v & 0xf] & 0xf0;
 101         b = (pal[v & 0xf] << 4) & 0xf0;
 102         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
 103         d += BPP;
 104         s ++;
 105         width -= 2;
 106     } while (width > 0);
 107 }
 108
 109 /*
 110  * 8-bit colour
 111  */
 112 static void glue(draw_line8_, DEPTH)(void *opaque,
 113                 uint8_t *d, const uint8_t *s, int width, int deststep)
 114 {
 115     uint16_t *pal = opaque;
 116     uint8_t v, r, g, b;
 117
 118     do {
 119         v = ldub_p((void *) s);
 120         r = (pal[v] >> 4) & 0xf0;
 121         g = pal[v] & 0xf0;
 122         b = (pal[v] << 4) & 0xf0;
 123         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
 124         s ++;
 125         d += BPP;
 126     } while (-- width != 0);
 127 }
 128
 129 /*
 130  * 12-bit colour
 131  */
 132 static void glue(draw_line12_, DEPTH)(void *opaque,
 133                 uint8_t *d, const uint8_t *s, int width, int deststep)
 134 {
 135     uint16_t v;
 136     uint8_t r, g, b;
 137
 138     do {
 139         v = lduw_p((void *) s);
 140         r = (v >> 4) & 0xf0;
 141         g = v & 0xf0;
 142         b = (v << 4) & 0xf0;
 143         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
 144         s += 2;
 145         d += BPP;
 146     } while (-- width != 0);
 147 }
 148
 149 /*
 150  * 16-bit colour
 151  */
 152 static void glue(draw_line16_, DEPTH)(void *opaque,
 153                 uint8_t *d, const uint8_t *s, int width, int deststep)
 154 {
 155 #if DEPTH == 16 && defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
 156     memcpy(d, s, width * 2);
 157 #else
 158     uint16_t v;
 159     uint8_t r, g, b;
 160
 161     do {
 162         v = lduw_p((void *) s);
 163         r = (v >> 8) & 0xf8;
 164         g = (v >> 3) & 0xfc;
 165         b = (v << 3) & 0xf8;
 166         ((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
 167         s += 2;
 168         d += BPP;
 169     } while (-- width != 0);
 170 #endif
 171 }
 172
 173 #undef DEPTH
 174 #undef BPP
 175 #undef PIXEL_TYPE