ui/vnc-palette.h

   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 #include <stdint.h>
  35 #include <stdbool.h>
  36
  37 #define VNC_PALETTE_HASH_SIZE 256
  38 #define VNC_PALETTE_MAX_SIZE  256
  39
  40 typedef struct VncPaletteEntry {
  41     int idx;
  42     uint32_t color;
  43     QLIST_ENTRY(VncPaletteEntry) next;
  44 } VncPaletteEntry;
  45
  46 typedef struct VncPalette {
  47     VncPaletteEntry pool[VNC_PALETTE_MAX_SIZE];
  48     size_t size;
  49     size_t max;
  50     int bpp;
  51     QLIST_HEAD(,VncPaletteEntry) table[VNC_PALETTE_HASH_SIZE];
  52 } VncPalette;
  53
  54 VncPalette *palette_new(size_t max, int bpp);
  55 void palette_init(VncPalette *palette, size_t max, int bpp);
  56 void palette_destroy(VncPalette *palette);
  57
  58 int palette_put(VncPalette *palette, uint32_t color);
  59 int palette_idx(const VncPalette *palette, uint32_t color);
  60 size_t palette_size(const VncPalette *palette);
  61
  62 void palette_iter(const VncPalette *palette,
  63                   void (*iter)(int idx, uint32_t color, void *opaque),
  64                   void *opaque);
  65 uint32_t palette_color(const VncPalette *palette, int idx, bool *found);
  66 size_t palette_fill(const VncPalette *palette,
  67                     uint32_t colors[VNC_PALETTE_MAX_SIZE]);
  68
  69 #endif /* VNC_PALETTE_H */