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/*
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 */
HBITMAP
cache_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 */
void
cache_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 */
void
cache_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 */
void
cache_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];
/* 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 */
void
cache_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 */
HCURSOR
cache_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 */
void
cache_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);
}
}
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