+++ /dev/null
-/* -*- c-basic-offset: 8 -*-
- rdesktop: A Remote Desktop Protocol client.
- Persistent Bitmap Cache routines
- Copyright (C) Jeroen Meijer <jeroen@oldambt7.com> 2004-2008
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "precomp.h"
-
-#define MAX_CELL_SIZE 0x1000 /* pixels */
-
-#define IS_PERSISTENT(id) (id < 8 && g_pstcache_fd[id] > 0)
-
-extern int g_server_depth;
-extern RD_BOOL g_bitmap_cache;
-extern RD_BOOL g_bitmap_cache_persist_enable;
-extern RD_BOOL g_bitmap_cache_precache;
-
-int g_pstcache_fd[8];
-int g_pstcache_Bpp;
-RD_BOOL g_pstcache_enumerated = False;
-uint8 zero_key[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
-
-
-/* Update mru stamp/index for a bitmap */
-void
-pstcache_touch_bitmap(uint8 cache_id, uint16 cache_idx, uint32 stamp)
-{
- int fd;
-
- if (!IS_PERSISTENT(cache_id) || cache_idx >= BMPCACHE2_NUM_PSTCELLS)
- return;
-
- fd = g_pstcache_fd[cache_id];
- rd_lseek_file(fd, 12 + cache_idx * (g_pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
- rd_write_file(fd, &stamp, sizeof(stamp));
-}
-
-/* Load a bitmap from the persistent cache */
-RD_BOOL
-pstcache_load_bitmap(uint8 cache_id, uint16 cache_idx)
-{
- uint8 *celldata;
- int fd;
- CELLHEADER cellhdr;
- RD_HBITMAP bitmap;
-
- if (!g_bitmap_cache_persist_enable)
- return False;
-
- if (!IS_PERSISTENT(cache_id) || cache_idx >= BMPCACHE2_NUM_PSTCELLS)
- return False;
-
- fd = g_pstcache_fd[cache_id];
- rd_lseek_file(fd, cache_idx * (g_pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
- rd_read_file(fd, &cellhdr, sizeof(CELLHEADER));
- celldata = (uint8 *) xmalloc(cellhdr.length);
- rd_read_file(fd, celldata, cellhdr.length);
-
- bitmap = ui_create_bitmap(cellhdr.width, cellhdr.height, celldata);
- DEBUG(("Load bitmap from disk: id=%d, idx=%d, bmp=%p)\n", cache_id, cache_idx, bitmap));
- cache_put_bitmap(cache_id, cache_idx, bitmap);
-
- xfree(celldata);
- return True;
-}
-
-/* Store a bitmap in the persistent cache */
-RD_BOOL
-pstcache_save_bitmap(uint8 cache_id, uint16 cache_idx, uint8 * key,
- uint8 width, uint8 height, uint16 length, uint8 * data)
-{
- int fd;
- CELLHEADER cellhdr;
-
- if (!IS_PERSISTENT(cache_id) || cache_idx >= BMPCACHE2_NUM_PSTCELLS)
- return False;
-
- memcpy(cellhdr.key, key, sizeof(HASH_KEY));
- cellhdr.width = width;
- cellhdr.height = height;
- cellhdr.length = length;
- cellhdr.stamp = 0;
-
- fd = g_pstcache_fd[cache_id];
- rd_lseek_file(fd, cache_idx * (g_pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
- rd_write_file(fd, &cellhdr, sizeof(CELLHEADER));
- rd_write_file(fd, data, length);
-
- return True;
-}
-
-/* List the bitmap keys from the persistent cache file */
-int
-pstcache_enumerate(uint8 id, HASH_KEY * keylist)
-{
- int fd, n;
- uint16 idx;
- sint16 mru_idx[0xa00];
- uint32 mru_stamp[0xa00];
- CELLHEADER cellhdr;
-
- if (!(g_bitmap_cache && g_bitmap_cache_persist_enable && IS_PERSISTENT(id)))
- return 0;
-
- /* The server disconnects if the bitmap cache content is sent more than once */
- if (g_pstcache_enumerated)
- return 0;
-
- DEBUG_RDP5(("Persistent bitmap cache enumeration... "));
- for (idx = 0; idx < BMPCACHE2_NUM_PSTCELLS; idx++)
- {
- fd = g_pstcache_fd[id];
- rd_lseek_file(fd, idx * (g_pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
- if (rd_read_file(fd, &cellhdr, sizeof(CELLHEADER)) <= 0)
- break;
-
- if (memcmp(cellhdr.key, zero_key, sizeof(HASH_KEY)) != 0)
- {
- memcpy(keylist[idx], cellhdr.key, sizeof(HASH_KEY));
-
- /* Pre-cache (not possible for 8 bit colour depth cause it needs a colourmap) */
- if (g_bitmap_cache_precache && cellhdr.stamp && g_server_depth > 8)
- pstcache_load_bitmap(id, idx);
-
- /* Sort by stamp */
- for (n = idx; n > 0 && cellhdr.stamp < mru_stamp[n - 1]; n--)
- {
- mru_idx[n] = mru_idx[n - 1];
- mru_stamp[n] = mru_stamp[n - 1];
- }
-
- mru_idx[n] = idx;
- mru_stamp[n] = cellhdr.stamp;
- }
- else
- {
- break;
- }
- }
-
- DEBUG_RDP5(("%d cached bitmaps.\n", idx));
-
- cache_rebuild_bmpcache_linked_list(id, mru_idx, idx);
- g_pstcache_enumerated = True;
- return idx;
-}
-
-/* initialise the persistent bitmap cache */
-RD_BOOL
-pstcache_init(uint8 cache_id)
-{
- int fd;
- char filename[256];
-
- if (g_pstcache_enumerated)
- return True;
-
- g_pstcache_fd[cache_id] = 0;
-
- if (!(g_bitmap_cache && g_bitmap_cache_persist_enable))
- return False;
-
- if (!rd_pstcache_mkdir())
- {
- DEBUG(("failed to get/make cache directory!\n"));
- return False;
- }
-
- g_pstcache_Bpp = (g_server_depth + 7) / 8;
- sprintf(filename, "cache/pstcache_%d_%d", cache_id, g_pstcache_Bpp);
- DEBUG(("persistent bitmap cache file: %s\n", filename));
-
- fd = rd_open_file(filename);
- if (fd == -1)
- return False;
-
- if (!rd_lock_file(fd, 0, 0))
- {
- warning("Persistent bitmap caching is disabled. (The file is already in use)\n");
- rd_close_file(fd);
- return False;
- }
-
- g_pstcache_fd[cache_id] = fd;
- return True;
-}
projects / reactos.git / blobdiff