hw/display/cirrus_vga_template.h

   1 /*
   2  * QEMU Cirrus VGA Emulator templates
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #if DEPTH == 8
  26 #define BPP 1
  27 #elif DEPTH == 15 || DEPTH == 16
  28 #define BPP 2
  29 #elif DEPTH == 32
  30 #define BPP 4
  31 #else
  32 #error unsupported depth
  33 #endif
  34
  35 static void glue(vga_draw_cursor_line_, DEPTH)(uint8_t *d1,
  36                                                const uint8_t *src1,
  37                                                int poffset, int w,
  38                                                unsigned int color0,
  39                                                unsigned int color1,
  40                                                unsigned int color_xor)
  41 {
  42     const uint8_t *plane0, *plane1;
  43     int x, b0, b1;
  44     uint8_t *d;
  45
  46     d = d1;
  47     plane0 = src1;
  48     plane1 = src1 + poffset;
  49     for (x = 0; x < w; x++) {
  50         b0 = (plane0[x >> 3] >> (7 - (x & 7))) & 1;
  51         b1 = (plane1[x >> 3] >> (7 - (x & 7))) & 1;
  52 #if DEPTH == 8
  53         switch (b0 | (b1 << 1)) {
  54         case 0:
  55             break;
  56         case 1:
  57             d[0] ^= color_xor;
  58             break;
  59         case 2:
  60             d[0] = color0;
  61             break;
  62         case 3:
  63             d[0] = color1;
  64             break;
  65         }
  66 #elif DEPTH == 16
  67         switch (b0 | (b1 << 1)) {
  68         case 0:
  69             break;
  70         case 1:
  71             ((uint16_t *)d)[0] ^= color_xor;
  72             break;
  73         case 2:
  74             ((uint16_t *)d)[0] = color0;
  75             break;
  76         case 3:
  77             ((uint16_t *)d)[0] = color1;
  78             break;
  79         }
  80 #elif DEPTH == 32
  81         switch (b0 | (b1 << 1)) {
  82         case 0:
  83             break;
  84         case 1:
  85             ((uint32_t *)d)[0] ^= color_xor;
  86             break;
  87         case 2:
  88             ((uint32_t *)d)[0] = color0;
  89             break;
  90         case 3:
  91             ((uint32_t *)d)[0] = color1;
  92             break;
  93         }
  94 #else
  95 #error unsupported depth
  96 #endif
  97         d += BPP;
  98     }
  99 }
 100
 101 #undef DEPTH
 102 #undef BPP