From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/ui/vnc-palette.c | 160 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 qemu/ui/vnc-palette.c (limited to 'qemu/ui/vnc-palette.c') diff --git a/qemu/ui/vnc-palette.c b/qemu/ui/vnc-palette.c new file mode 100644 index 000000000..c130deee9 --- /dev/null +++ b/qemu/ui/vnc-palette.c @@ -0,0 +1,160 @@ +/* + * QEMU VNC display driver: palette hash table + * + * From libvncserver/libvncserver/tight.c + * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved. + * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved. + * + * Copyright (C) 2010 Corentin Chary + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "vnc-palette.h" +#include +#include + +static VncPaletteEntry *palette_find(const VncPalette *palette, + uint32_t color, unsigned int hash) +{ + VncPaletteEntry *entry; + + QLIST_FOREACH(entry, &palette->table[hash], next) { + if (entry->color == color) { + return entry; + } + } + + return NULL; +} + +static unsigned int palette_hash(uint32_t rgb, int bpp) +{ + if (bpp == 16) { + return ((unsigned int)(((rgb >> 8) + rgb) & 0xFF)); + } else { + return ((unsigned int)(((rgb >> 16) + (rgb >> 8)) & 0xFF)); + } +} + +VncPalette *palette_new(size_t max, int bpp) +{ + VncPalette *palette; + + palette = g_malloc0(sizeof(*palette)); + palette_init(palette, max, bpp); + return palette; +} + +void palette_init(VncPalette *palette, size_t max, int bpp) +{ + memset(palette, 0, sizeof (*palette)); + palette->max = max; + palette->bpp = bpp; +} + +void palette_destroy(VncPalette *palette) +{ + g_free(palette); +} + +int palette_put(VncPalette *palette, uint32_t color) +{ + unsigned int hash; + unsigned int idx = palette->size; + VncPaletteEntry *entry; + + hash = palette_hash(color, palette->bpp) % VNC_PALETTE_HASH_SIZE; + entry = palette_find(palette, color, hash); + + if (!entry && palette->size >= palette->max) { + return 0; + } + if (!entry) { + VncPaletteEntry *entry; + + entry = &palette->pool[palette->size]; + entry->color = color; + entry->idx = idx; + QLIST_INSERT_HEAD(&palette->table[hash], entry, next); + palette->size++; + } + return palette->size; +} + +int palette_idx(const VncPalette *palette, uint32_t color) +{ + VncPaletteEntry *entry; + unsigned int hash; + + hash = palette_hash(color, palette->bpp) % VNC_PALETTE_HASH_SIZE; + entry = palette_find(palette, color, hash); + return (entry == NULL ? -1 : entry->idx); +} + +size_t palette_size(const VncPalette *palette) +{ + return palette->size; +} + +void palette_iter(const VncPalette *palette, + void (*iter)(int idx, uint32_t color, void *opaque), + void *opaque) +{ + int i; + VncPaletteEntry *entry; + + for (i = 0; i < VNC_PALETTE_HASH_SIZE; i++) { + QLIST_FOREACH(entry, &palette->table[i], next) { + iter(entry->idx, entry->color, opaque); + } + } +} + +uint32_t palette_color(const VncPalette *palette, int idx, bool *found) +{ + int i; + VncPaletteEntry *entry; + + for (i = 0; i < VNC_PALETTE_HASH_SIZE; i++) { + QLIST_FOREACH(entry, &palette->table[i], next) { + if (entry->idx == idx) { + *found = true; + return entry->color; + } + } + } + + *found = false; + return -1; +} + +static void palette_fill_cb(int idx, uint32_t color, void *opaque) +{ + uint32_t *colors = opaque; + + colors[idx] = color; +} + +size_t palette_fill(const VncPalette *palette, + uint32_t colors[VNC_PALETTE_MAX_SIZE]) +{ + palette_iter(palette, palette_fill_cb, colors); + return palette_size(palette); +} -- cgit 1.2.3-korg