xref: /openbmc/qemu/ui/vnc-enc-hextile.c (revision 0a553c12)
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 "qemu/osdep.h"
28 #include "vnc.h"
29 
hextile_enc_cord(uint8_t * ptr,int x,int y,int w,int h)30 static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h)
31 {
32     ptr[0] = ((x & 0x0F) << 4) | (y & 0x0F);
33     ptr[1] = (((w - 1) & 0x0F) << 4) | ((h - 1) & 0x0F);
34 }
35 
36 #define BPP 32
37 #include "vnc-enc-hextile-template.h"
38 #undef BPP
39 
40 #define GENERIC
41 #define BPP 32
42 #include "vnc-enc-hextile-template.h"
43 #undef BPP
44 #undef GENERIC
45 
vnc_hextile_send_framebuffer_update(VncState * vs,int x,int y,int w,int h)46 int vnc_hextile_send_framebuffer_update(VncState *vs, int x,
47                                         int y, int w, int h)
48 {
49     int i, j;
50     int has_fg, has_bg;
51     uint8_t *last_fg, *last_bg;
52 
53     last_fg = g_malloc(VNC_SERVER_FB_BYTES);
54     last_bg = g_malloc(VNC_SERVER_FB_BYTES);
55     has_fg = has_bg = 0;
56     for (j = y; j < (y + h); j += 16) {
57         for (i = x; i < (x + w); i += 16) {
58             vs->hextile.send_tile(vs, i, j,
59                                   MIN(16, x + w - i), MIN(16, y + h - j),
60                                   last_bg, last_fg, &has_bg, &has_fg);
61         }
62     }
63     g_free(last_fg);
64     g_free(last_bg);
65 
66     return 1;
67 }
68 
vnc_hextile_set_pixel_conversion(VncState * vs,int generic)69 void vnc_hextile_set_pixel_conversion(VncState *vs, int generic)
70 {
71     if (!generic) {
72         switch (VNC_SERVER_FB_BITS) {
73         case 32:
74             vs->hextile.send_tile = send_hextile_tile_32;
75             break;
76         }
77     } else {
78         switch (VNC_SERVER_FB_BITS) {
79         case 32:
80             vs->hextile.send_tile = send_hextile_tile_generic_32;
81             break;
82         }
83     }
84 }
85