vnc-encoding-hextile.c

   1 /*
   2  * QEMU VNC display driver: hextile encoding
   3  *
   4  * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
   5  * Copyright (C) 2006 Fabrice Bellard
   6  * Copyright (C) 2009 Red Hat, Inc
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "vnc.h"
  28
  29 static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
  30 {
  31     ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
  32     ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
  33 }
  34
  35 #define BPP 8
  36 #include "vnchextile.h"
  37 #undef BPP
  38
  39 #define BPP 16
  40 #include "vnchextile.h"
  41 #undef BPP
  42
  43 #define BPP 32
  44 #include "vnchextile.h"
  45 #undef BPP
  46
  47 #define GENERIC
  48 #define BPP 8
  49 #include "vnchextile.h"
  50 #undef BPP
  51 #undef GENERIC
  52
  53 #define GENERIC
  54 #define BPP 16
  55 #include "vnchextile.h"
  56 #undef BPP
  57 #undef GENERIC
  58
  59 #define GENERIC
  60 #define BPP 32
  61 #include "vnchextile.h"
  62 #undef BPP
  63 #undef GENERIC
  64
  65 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
  66                                         int y, int w, int h)
  67 {
  68     int i, j;
  69     int has_fg, has_bg;
  70     uint8_t *last_fg, *last_bg;
  71     VncDisplay *vd = vs->vd;
  72
  73     last_fg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
  74     last_bg = (uint8_t *) qemu_malloc(vd->server->pf.bytes_per_pixel);
  75     has_fg = has_bg = 0;
  76     for (j = y; j < (y + h); j += 16) {
  77         for (i = x; i < (x + w); i += 16) {
  78             vs->send_hextile_tile(vs, i, j,
  79                                   MIN(16, x + w - i), MIN(16, y + h - j),
  80                                   last_bg, last_fg, &has_bg, &has_fg);
  81         }
  82     }
  83     free(last_fg);
  84     free(last_bg);
  85
  86     return 1;
  87 }
  88
  89 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
  90 {
  91     if (!generic) {
  92         switch (vs->ds->surface->pf.bits_per_pixel) {
  93             case 8:
  94                 vs->send_hextile_tile = send_hextile_tile_8;
  95                 break;
  96             case 16:
  97                 vs->send_hextile_tile = send_hextile_tile_16;
  98                 break;
  99             case 32:
 100                 vs->send_hextile_tile = send_hextile_tile_32;
 101                 break;
 102         }
 103     } else {
 104         switch (vs->ds->surface->pf.bits_per_pixel) {
 105             case 8:
 106                 vs->send_hextile_tile = send_hextile_tile_generic_8;
 107                 break;
 108             case 16:
 109                 vs->send_hextile_tile = send_hextile_tile_generic_16;
 110                 break;
 111             case 32:
 112                 vs->send_hextile_tile = send_hextile_tile_generic_32;
 113                 break;
 114         }
 115     }
 116 }