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/* |
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rdesktop: A Remote Desktop Protocol client. |
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Cache routines |
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Copyright (C) Matthew Chapman 1999-2002 |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include "rdesktop.h" |
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|
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#define NUM_ELEMENTS(array) (sizeof(array) / sizeof(array[0])) |
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#define TOUCH(id, idx) (g_bmpcache[id][idx].usage = ++g_stamp) |
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#define IS_PERSISTENT(id) (g_pstcache_fd[id] > 0) |
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|
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extern int g_pstcache_fd[]; |
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|
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uint32 g_stamp; |
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int g_num_bitmaps_in_memory[3]; |
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|
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|
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/* BITMAP CACHE */ |
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static BMPCACHEENTRY g_bmpcache[3][0xa00]; |
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static HBITMAP g_volatile_bc[3]; |
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|
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/* Remove the least-recently used bitmap from the cache */ |
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void |
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cache_remove_lru_bitmap(uint8 cache_id) |
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{ |
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int i; |
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uint16 cache_idx = 0; |
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uint32 m = (uint32)-1; |
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BMPCACHEENTRY *pbce; |
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|
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for (i = 0; i < NUM_ELEMENTS(g_bmpcache[cache_id]); i++) |
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{ |
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if (g_bmpcache[cache_id][i].bitmap && g_bmpcache[cache_id][i].usage < m) |
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{ |
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cache_idx = i; |
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m = g_bmpcache[cache_id][i].usage; |
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} |
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} |
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|
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pbce = &g_bmpcache[cache_id][cache_idx]; |
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ui_destroy_bitmap(pbce->bitmap); |
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--g_num_bitmaps_in_memory[cache_id]; |
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pbce->bitmap = 0; |
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pbce->usage = 0; |
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} |
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|
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/* Retrieve a bitmap from the cache */ |
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HBITMAP |
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cache_get_bitmap(uint8 cache_id, uint16 cache_idx) |
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{ |
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HBITMAP *pbitmap; |
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|
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if ((cache_id < NUM_ELEMENTS(g_bmpcache)) && (cache_idx < NUM_ELEMENTS(g_bmpcache[0]))) |
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{ |
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pbitmap = &g_bmpcache[cache_id][cache_idx].bitmap; |
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if ((*pbitmap != 0) || pstcache_load_bitmap(cache_id, cache_idx)) |
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{ |
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if (IS_PERSISTENT(cache_id)) |
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TOUCH(cache_id, cache_idx); |
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|
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return *pbitmap; |
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} |
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} |
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else if ((cache_id < NUM_ELEMENTS(g_volatile_bc)) && (cache_idx == 0x7fff)) |
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{ |
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return g_volatile_bc[cache_id]; |
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} |
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|
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error("get bitmap %d:%d\n", cache_id, cache_idx); |
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return NULL; |
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} |
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|
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/* Store a bitmap in the cache */ |
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void |
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cache_put_bitmap(uint8 cache_id, uint16 cache_idx, HBITMAP bitmap, uint32 stamp) |
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{ |
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HBITMAP old; |
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|
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if ((cache_id < NUM_ELEMENTS(g_bmpcache)) && (cache_idx < NUM_ELEMENTS(g_bmpcache[0]))) |
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{ |
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old = g_bmpcache[cache_id][cache_idx].bitmap; |
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if (old != NULL) |
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{ |
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ui_destroy_bitmap(old); |
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} |
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else |
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{ |
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if (++g_num_bitmaps_in_memory[cache_id] > BMPCACHE2_C2_CELLS) |
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cache_remove_lru_bitmap(cache_id); |
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} |
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|
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g_bmpcache[cache_id][cache_idx].bitmap = bitmap; |
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g_bmpcache[cache_id][cache_idx].usage = stamp; |
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} |
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else if ((cache_id < NUM_ELEMENTS(g_volatile_bc)) && (cache_idx == 0x7fff)) |
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{ |
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old = g_volatile_bc[cache_id]; |
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if (old != NULL) |
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ui_destroy_bitmap(old); |
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g_volatile_bc[cache_id] = bitmap; |
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} |
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else |
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{ |
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error("put bitmap %d:%d\n", cache_id, cache_idx); |
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} |
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} |
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|
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/* Updates the persistent bitmap cache MRU information on exit */ |
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void |
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cache_save_state(void) |
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{ |
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int id, idx; |
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|
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for (id = 0; id < NUM_ELEMENTS(g_bmpcache); id++) |
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if (IS_PERSISTENT(id)) |
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for (idx = 0; idx < NUM_ELEMENTS(g_bmpcache[id]); idx++) |
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pstcache_touch_bitmap(id, idx, g_bmpcache[id][idx].usage); |
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} |
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|
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|
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/* FONT CACHE */ |
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static FONTGLYPH g_fontcache[12][256]; |
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|
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/* Retrieve a glyph from the font cache */ |
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FONTGLYPH * |
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cache_get_font(uint8 font, uint16 character) |
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{ |
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FONTGLYPH *glyph; |
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|
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if ((font < NUM_ELEMENTS(g_fontcache)) && (character < NUM_ELEMENTS(g_fontcache[0]))) |
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{ |
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glyph = &g_fontcache[font][character]; |
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if (glyph->pixmap != NULL) |
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return glyph; |
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} |
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|
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error("get font %d:%d\n", font, character); |
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return NULL; |
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} |
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|
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/* Store a glyph in the font cache */ |
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void |
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cache_put_font(uint8 font, uint16 character, uint16 offset, |
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uint16 baseline, uint16 width, uint16 height, HGLYPH pixmap) |
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{ |
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FONTGLYPH *glyph; |
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|
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if ((font < NUM_ELEMENTS(g_fontcache)) && (character < NUM_ELEMENTS(g_fontcache[0]))) |
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{ |
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glyph = &g_fontcache[font][character]; |
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if (glyph->pixmap != NULL) |
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ui_destroy_glyph(glyph->pixmap); |
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|
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glyph->offset = offset; |
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glyph->baseline = baseline; |
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glyph->width = width; |
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glyph->height = height; |
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glyph->pixmap = pixmap; |
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} |
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else |
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{ |
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error("put font %d:%d\n", font, character); |
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} |
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} |
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|
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|
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/* TEXT CACHE */ |
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static DATABLOB g_textcache[256]; |
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|
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/* Retrieve a text item from the cache */ |
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DATABLOB * |
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cache_get_text(uint8 cache_id) |
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{ |
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DATABLOB *text; |
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|
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if (cache_id < NUM_ELEMENTS(g_textcache)) |
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{ |
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text = &g_textcache[cache_id]; |
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if (text->data != NULL) |
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return text; |
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} |
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|
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error("get text %d\n", cache_id); |
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return NULL; |
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} |
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|
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/* Store a text item in the cache */ |
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void |
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cache_put_text(uint8 cache_id, void *data, int length) |
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{ |
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DATABLOB *text; |
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|
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if (cache_id < NUM_ELEMENTS(g_textcache)) |
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{ |
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text = &g_textcache[cache_id]; |
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if (text->data != NULL) |
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xfree(text->data); |
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|
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text->data = xmalloc(length); |
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text->size = length; |
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memcpy(text->data, data, length); |
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} |
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else |
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{ |
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error("put text %d\n", cache_id); |
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} |
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} |
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|
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|
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/* DESKTOP CACHE */ |
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static uint8 g_deskcache[0x38400 * 4]; |
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|
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/* Retrieve desktop data from the cache */ |
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uint8 * |
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cache_get_desktop(uint32 offset, int cx, int cy, int bytes_per_pixel) |
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{ |
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int length = cx * cy * bytes_per_pixel; |
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|
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if (offset > sizeof(g_deskcache)) |
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offset = 0; |
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|
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if ((offset + length) <= sizeof(g_deskcache)) |
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{ |
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return &g_deskcache[offset]; |
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} |
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|
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error("get desktop %d:%d\n", offset, length); |
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return NULL; |
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} |
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|
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/* Store desktop data in the cache */ |
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void |
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cache_put_desktop(uint32 offset, int cx, int cy, int scanline, int bytes_per_pixel, uint8 * data) |
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{ |
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int length = cx * cy * bytes_per_pixel; |
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|
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if (offset > sizeof(g_deskcache)) |
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offset = 0; |
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|
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if ((offset + length) <= sizeof(g_deskcache)) |
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{ |
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cx *= bytes_per_pixel; |
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while (cy--) |
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{ |
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memcpy(&g_deskcache[offset], data, cx); |
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data += scanline; |
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offset += cx; |
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} |
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} |
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else |
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{ |
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error("put desktop %d:%d\n", offset, length); |
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} |
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} |
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|
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|
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/* CURSOR CACHE */ |
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static HCURSOR g_cursorcache[0x20]; |
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|
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/* Retrieve cursor from cache */ |
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HCURSOR |
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cache_get_cursor(uint16 cache_idx) |
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{ |
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HCURSOR cursor; |
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|
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if (cache_idx < NUM_ELEMENTS(g_cursorcache)) |
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{ |
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cursor = g_cursorcache[cache_idx]; |
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if (cursor != NULL) |
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return cursor; |
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} |
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|
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error("get cursor %d\n", cache_idx); |
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return NULL; |
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} |
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|
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/* Store cursor in cache */ |
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void |
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cache_put_cursor(uint16 cache_idx, HCURSOR cursor) |
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{ |
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HCURSOR old; |
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|
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if (cache_idx < NUM_ELEMENTS(g_cursorcache)) |
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{ |
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old = g_cursorcache[cache_idx]; |
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if (old != NULL) |
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ui_destroy_cursor(old); |
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|
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g_cursorcache[cache_idx] = cursor; |
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} |
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else |
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{ |
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error("put cursor %d\n", cache_idx); |
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} |
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} |
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