xref: /openbmc/qemu/ui/vnc-palette.h (revision 4a09d0bb)
1 /*
2  * QEMU VNC display driver: palette hash table
3  *
4  * From libvncserver/libvncserver/tight.c
5  * Copyright (C) 2000, 2001 Const Kaplinsky.  All Rights Reserved.
6  * Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
7  *
8  * Copyright (C) 2010 Corentin Chary <corentin.chary@gmail.com>
9  *
10  * Permission is hereby granted, free of charge, to any person obtaining a copy
11  * of this software and associated documentation files (the "Software"), to deal
12  * in the Software without restriction, including without limitation the rights
13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14  * copies of the Software, and to permit persons to whom the Software is
15  * furnished to do so, subject to the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be included in
18  * all copies or substantial portions of the Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26  * THE SOFTWARE.
27  */
28 
29 #ifndef VNC_PALETTE_H
30 #define VNC_PALETTE_H
31 
32 #include "qapi/qmp/qlist.h"
33 #include "qemu/queue.h"
34 
35 #define VNC_PALETTE_HASH_SIZE 256
36 #define VNC_PALETTE_MAX_SIZE  256
37 
38 typedef struct VncPaletteEntry {
39     int idx;
40     uint32_t color;
41     QLIST_ENTRY(VncPaletteEntry) next;
42 } VncPaletteEntry;
43 
44 typedef struct VncPalette {
45     VncPaletteEntry pool[VNC_PALETTE_MAX_SIZE];
46     size_t size;
47     size_t max;
48     int bpp;
49     QLIST_HEAD(,VncPaletteEntry) table[VNC_PALETTE_HASH_SIZE];
50 } VncPalette;
51 
52 VncPalette *palette_new(size_t max, int bpp);
53 void palette_init(VncPalette *palette, size_t max, int bpp);
54 void palette_destroy(VncPalette *palette);
55 
56 int palette_put(VncPalette *palette, uint32_t color);
57 int palette_idx(const VncPalette *palette, uint32_t color);
58 size_t palette_size(const VncPalette *palette);
59 
60 void palette_iter(const VncPalette *palette,
61                   void (*iter)(int idx, uint32_t color, void *opaque),
62                   void *opaque);
63 uint32_t palette_color(const VncPalette *palette, int idx, bool *found);
64 size_t palette_fill(const VncPalette *palette,
65                     uint32_t colors[VNC_PALETTE_MAX_SIZE]);
66 
67 #endif /* VNC_PALETTE_H */
68