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
  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 */