/*   rdesktop: A Remote Desktop Protocol client.   Cache routines   Copyright (C) Matthew Chapman 1999-2002      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 2 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, write to the Free Software   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.*/#include "rdesktop.h"#define NUM_ELEMENTS(array) (sizeof(array) / sizeof(array[0]))/* BITMAP CACHE */static HBITMAP bmpcache[3][600];/* Retrieve a bitmap from the cache */HBITMAPcache_get_bitmap(uint8 cache_id, uint16 cache_idx){	HBITMAP bitmap;	if ((cache_id < NUM_ELEMENTS(bmpcache)) && (cache_idx < NUM_ELEMENTS(bmpcache[0])))	{		bitmap = bmpcache[cache_id][cache_idx];		if (bitmap != NULL)			return bitmap;	}	error("get bitmap %d:%d\n", cache_id, cache_idx);	return NULL;}/* Store a bitmap in the cache */voidcache_put_bitmap(uint8 cache_id, uint16 cache_idx, HBITMAP bitmap){	HBITMAP old;	if ((cache_id < NUM_ELEMENTS(bmpcache)) && (cache_idx < NUM_ELEMENTS(bmpcache[0])))	{		old = bmpcache[cache_id][cache_idx];		if (old != NULL)			ui_destroy_bitmap(old);		bmpcache[cache_id][cache_idx] = bitmap;	}	else	{		error("put bitmap %d:%d\n", cache_id, cache_idx);	}}/* FONT CACHE */static FONTGLYPH fontcache[12][256];/* Retrieve a glyph from the font cache */FONTGLYPH *cache_get_font(uint8 font, uint16 character){	FONTGLYPH *glyph;	if ((font < NUM_ELEMENTS(fontcache)) && (character < NUM_ELEMENTS(fontcache[0])))	{		glyph = &fontcache[font][character];		if (glyph->pixmap != NULL)			return glyph;	}	error("get font %d:%d\n", font, character);	return NULL;}/* Store a glyph in the font cache */voidcache_put_font(uint8 font, uint16 character, uint16 offset,	       uint16 baseline, uint16 width, uint16 height, HGLYPH pixmap){	FONTGLYPH *glyph;	if ((font < NUM_ELEMENTS(fontcache)) && (character < NUM_ELEMENTS(fontcache[0])))	{		glyph = &fontcache[font][character];		if (glyph->pixmap != NULL)			ui_destroy_glyph(glyph->pixmap);		glyph->offset = offset;		glyph->baseline = baseline;		glyph->width = width;		glyph->height = height;		glyph->pixmap = pixmap;	}	else	{		error("put font %d:%d\n", font, character);	}}/* TEXT CACHE */static DATABLOB textcache[256];/* Retrieve a text item from the cache */DATABLOB *cache_get_text(uint8 cache_id){	DATABLOB *text;	if (cache_id < NUM_ELEMENTS(textcache))	{		text = &textcache[cache_id];		if (text->data != NULL)			return text;	}	error("get text %d\n", cache_id);	return NULL;}/* Store a text item in the cache */voidcache_put_text(uint8 cache_id, void *data, int length){	DATABLOB *text;	if (cache_id < NUM_ELEMENTS(textcache))	{		text = &textcache[cache_id];		if (text->data != NULL)			xfree(text->data);		text->data = xmalloc(length);		text->size = length;		memcpy(text->data, data, length);	}	else	{		error("put text %d\n", cache_id);	}}/* DESKTOP CACHE */static uint8 deskcache[0x38400 * 4];/* Retrieve desktop data from the cache */uint8 *cache_get_desktop(uint32 offset, int cx, int cy, int bytes_per_pixel){	int length = cx * cy * bytes_per_pixel;	if ((offset + length) <= sizeof(deskcache))	{		return &deskcache[offset];	}	error("get desktop %d:%d\n", offset, length);	return NULL;}/* Store desktop data in the cache */voidcache_put_desktop(uint32 offset, int cx, int cy, int scanline, int bytes_per_pixel, uint8 * data){	int length = cx * cy * bytes_per_pixel;	if ((offset + length) <= sizeof(deskcache))	{		cx *= bytes_per_pixel;		while (cy--)		{			memcpy(&deskcache[offset], data, cx);			data += scanline;			offset += cx;		}	}	else	{		error("put desktop %d:%d\n", offset, length);	}}/* CURSOR CACHE */static HCURSOR cursorcache[0x20];/* Retrieve cursor from cache */HCURSORcache_get_cursor(uint16 cache_idx){	HCURSOR cursor;	if (cache_idx < NUM_ELEMENTS(cursorcache))	{		cursor = cursorcache[cache_idx];		if (cursor != NULL)			return cursor;	}	error("get cursor %d\n", cache_idx);	return NULL;}/* Store cursor in cache */voidcache_put_cursor(uint16 cache_idx, HCURSOR cursor){	HCURSOR old;	if (cache_idx < NUM_ELEMENTS(cursorcache))	{		old = cursorcache[cache_idx];		if (old != NULL)			ui_destroy_cursor(old);		cursorcache[cache_idx] = cursor;	}	else	{		error("put cursor %d\n", cache_idx);	}}