pstcache.c File Reference

#include "rdesktop.h"

Include dependency graph for pstcache.c:

Go to the source code of this file.

Macros
#define	MAX_CELL_SIZE   0x1000 /* pixels */
#define	IS_PERSISTENT(id)   (id < 8 && This->pstcache_fd[id] > 0)

Functions
void	pstcache_touch_bitmap (RDPCLIENT *This, uint8 cache_id, uint16 cache_idx, uint32 stamp)
BOOL	pstcache_load_bitmap (RDPCLIENT *This, uint8 cache_id, uint16 cache_idx)
BOOL	pstcache_save_bitmap (RDPCLIENT *This, uint8 cache_id, uint16 cache_idx, uint8 *key, uint8 width, uint8 height, uint16 length, uint8 *data)
int	pstcache_enumerate (RDPCLIENT *This, uint8 id, HASH_KEY *keylist)
BOOL	pstcache_init (RDPCLIENT *This, uint8 cache_id)

Variables
const uint8	zero_key [] = { 0, 0, 0, 0, 0, 0, 0, 0 }

Macro Definition Documentation

IS_PERSISTENT

#define IS_PERSISTENT

(

id

)

(id < 8 && This->pstcache_fd[id] > 0)

Definition at line 25 of file pstcache.c.

MAX_CELL_SIZE

#define MAX_CELL_SIZE   0x1000 /* pixels */

Definition at line 23 of file pstcache.c.

Function Documentation

pstcache_enumerate()

int pstcache_enumerate	(	RDPCLIENT *	This,
		uint8	id,
		HASH_KEY *	keylist
	)

Definition at line 104 of file pstcache.c.

{
    int fd, n;
    uint16 idx;
    sint16 mru_idx[0xa00];
    uint32 mru_stamp[0xa00];
    CELLHEADER cellhdr;

    if (!(This->bitmap_cache && This->bitmap_cache_persist_enable && IS_PERSISTENT(id)))
        return 0;

    /* The server disconnects if the bitmap cache content is sent more than once */
    if (This->pstcache_enumerated)
        return 0;

    DEBUG_RDP5(("Persistent bitmap cache enumeration... "));
    for (idx = 0; idx < BMPCACHE2_NUM_PSTCELLS; idx++)
    {
        fd = This->pstcache_fd[id];
        rd_lseek_file(fd, idx * (This->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 (This->bitmap_cache_precache && cellhdr.stamp && This->server_depth > 8)
                pstcache_load_bitmap(This, 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(This, id, mru_idx, idx);
    This->pstcache_enumerated = True;
    return idx;
}

pstcache_init()

BOOL pstcache_init	(	RDPCLIENT *	This,
		uint8	cache_id
	)

Definition at line 160 of file pstcache.c.

{
    int fd;
    char filename[256];

    if (This->pstcache_enumerated)
        return True;

    This->pstcache_fd[cache_id] = 0;

    if (!(This->bitmap_cache && This->bitmap_cache_persist_enable))
        return False;

    if (!rd_pstcache_mkdir())
    {
        DEBUG(("failed to get/make cache directory!\n"));
        return False;
    }

    This->pstcache_Bpp = (This->server_depth + 7) / 8;
    sprintf(filename, "cache/pstcache_%d_%d", cache_id, This->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;
    }

    This->pstcache_fd[cache_id] = fd;
    return True;
}

pstcache_load_bitmap()

BOOL pstcache_load_bitmap	(	RDPCLIENT *	This,
		uint8	cache_id,
		uint16	cache_idx
	)

Definition at line 46 of file pstcache.c.

{
    uint8 *celldata;
    int fd;
    CELLHEADER cellhdr;
    HBITMAP bitmap;

    if (!This->bitmap_cache_persist_enable)
        return False;

    if (!IS_PERSISTENT(cache_id) || cache_idx >= BMPCACHE2_NUM_PSTCELLS)
        return False;

    fd = This->pstcache_fd[cache_id];
    rd_lseek_file(fd, cache_idx * (This->pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
    rd_read_file(fd, &cellhdr, sizeof(CELLHEADER));
    celldata = (uint8 *) malloc(cellhdr.length);

    if(celldata == NULL)
        return False;

    rd_read_file(fd, celldata, cellhdr.length);

    bitmap = ui_create_bitmap(This, cellhdr.width, cellhdr.height, celldata);
    DEBUG(("Load bitmap from disk: id=%d, idx=%d, bmp=0x%x)\n", cache_id, cache_idx, bitmap));
    cache_put_bitmap(This, cache_id, cache_idx, bitmap);

    free(celldata);
    return True;
}

pstcache_save_bitmap()

BOOL pstcache_save_bitmap	(	RDPCLIENT *	This,
		uint8	cache_id,
		uint16	cache_idx,
		uint8 *	key,
		uint8	width,
		uint8	height,
		uint16	length,
		uint8 *	data
	)

Definition at line 79 of file pstcache.c.

{
    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 = This->pstcache_fd[cache_id];
    rd_lseek_file(fd, cache_idx * (This->pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
    rd_write_file(fd, &cellhdr, sizeof(CELLHEADER));
    rd_write_file(fd, data, length);

    return True;
}

pstcache_touch_bitmap()

void pstcache_touch_bitmap	(	RDPCLIENT *	This,
		uint8	cache_id,
		uint16	cache_idx,
		uint32	stamp
	)

Definition at line 32 of file pstcache.c.

{
    int fd;

    if (!IS_PERSISTENT(cache_id) || cache_idx >= BMPCACHE2_NUM_PSTCELLS)
        return;

    fd = This->pstcache_fd[cache_id];
    rd_lseek_file(fd, 12 + cache_idx * (This->pstcache_Bpp * MAX_CELL_SIZE + sizeof(CELLHEADER)));
    rd_write_file(fd, &stamp, sizeof(stamp));
}

Variable Documentation

zero_key

const uint8 zero_key[] = { 0, 0, 0, 0, 0, 0, 0, 0 }

Definition at line 27 of file pstcache.c.