227253cfe4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2552 a1c6a512-1295-4272-9138-f99709370657
366 lines
9.5 KiB
C
366 lines
9.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*
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* Rockbox startup font initialization
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* This file specifies which fonts get compiled-in and
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* loaded at startup, as well as their mapping into
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* the FONT_SYSFIXED, FONT_UI and FONT_MP3 ids.
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*/
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#include "config.h"
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#if defined(HAVE_LCD_BITMAP) || defined(SIMULATOR)
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#include <stdio.h>
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#include <string.h>
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#include "lcd.h"
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#include "font.h"
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#include "file.h"
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#include "debug.h"
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#include "panic.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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/* compiled-in font */
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extern struct font sysfont;
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/* structure filled in by font_load */
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static struct font font_ui;
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/* system font table, in order of FONT_xxx definition */
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static struct font* sysfonts[MAXFONTS] = { &sysfont, &font_ui };
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/* static buffer allocation structures */
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static unsigned char mbuf[MAX_FONT_SIZE];
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static unsigned char *freeptr = mbuf;
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static unsigned char *fileptr;
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static unsigned char *eofptr;
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static void rotate_font_bits(struct font* pf);
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static void rotleft(unsigned char *dst,
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bitmap_t *src,
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unsigned int width,
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unsigned int height);
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void font_init(void)
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{
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rotate_font_bits(&sysfont);
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memset(&font_ui, 0, sizeof(struct font));
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}
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static int readshort(unsigned short *sp)
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{
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unsigned short s;
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s = *fileptr++ & 0xff;
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*sp = (*fileptr++ << 8) | s;
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return (fileptr <= eofptr);
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}
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static int readlong(unsigned long *lp)
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{
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unsigned long l;
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l = *fileptr++ & 0xff;
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l |= *fileptr++ << 8;
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l |= *fileptr++ << 16;
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*lp = (*fileptr++ << 24) | l;
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return (fileptr <= eofptr);
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}
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/* read count bytes*/
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static int readstr(char *buf, int count)
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{
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int n = count;
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while (--n >= 0)
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*buf++ = *fileptr++;
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return (fileptr <= eofptr)? count: 0;
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}
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/* read totlen bytes, return NUL terminated string*/
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/* may write 1 past buf[totlen]; removes blank pad*/
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static int readstrpad(char *buf, int totlen)
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{
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char *p = buf;
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int n = totlen;
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while (--n >= 0)
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*p++ = *fileptr++;
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if (fileptr > eofptr)
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return 0;
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p = &buf[totlen];
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*p-- = 0;
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while (*p == ' ' && p >= buf)
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*p-- = '\0';
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return totlen;
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}
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void font_reset(void)
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{
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memset(&font_ui, 0, sizeof(struct font));
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}
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/* read and load font into incore font structure*/
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struct font* font_load(char *path)
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{
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int fd, filesize;
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unsigned short maxwidth, height, ascent, pad;
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unsigned long firstchar, defaultchar, size;
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unsigned long i, nbits, noffset, nwidth;
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char version[4+1];
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char copyright[256+1];
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struct font* pf = &font_ui;
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/* open and read entire font file*/
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fd = open(path, O_RDONLY|O_BINARY);
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if (fd < 0) {
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DEBUGF("Can't open font: %s\n", path);
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return NULL;
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}
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font_reset();
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/* currently, font loading replaces earlier font allocation*/
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freeptr = (unsigned char *)(((int)mbuf + 3) & ~3);
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fileptr = freeptr;
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filesize = read(fd, fileptr, MAX_FONT_SIZE);
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eofptr = fileptr + filesize;
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/* no need for multiple font loads currently*/
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/*freeptr += filesize;*/
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/*freeptr = (unsigned char *)(freeptr + 3) & ~3;*/ /* pad freeptr*/
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close(fd);
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if (filesize == MAX_FONT_SIZE) {
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DEBUGF("Font %s too large: %d\n", path, filesize);
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return NULL;
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}
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/* read magic and version #*/
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memset(version, 0, sizeof(version));
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if (readstr(version, 4) != 4)
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return NULL;
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if (strcmp(version, VERSION) != 0)
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return NULL;
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/* internal font name*/
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pf->name = fileptr;
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if (readstrpad(pf->name, 64) != 64)
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return NULL;
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/* copyright, not currently stored*/
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if (readstrpad(copyright, 256) != 256)
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return NULL;
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/* font info*/
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if (!readshort(&maxwidth))
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return NULL;
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pf->maxwidth = maxwidth;
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if (!readshort(&height))
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return NULL;
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pf->height = height;
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if (!readshort(&ascent))
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return NULL;
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pf->ascent = ascent;
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if (!readshort(&pad))
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return NULL;
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if (!readlong(&firstchar))
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return NULL;
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pf->firstchar = firstchar;
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if (!readlong(&defaultchar))
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return NULL;
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pf->defaultchar = defaultchar;
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if (!readlong(&size))
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return NULL;
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pf->size = size;
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/* get variable font data sizes*/
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/* # words of bitmap_t*/
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if (!readlong(&nbits))
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return NULL;
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pf->bits_size = nbits;
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/* # longs of offset*/
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if (!readlong(&noffset))
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return NULL;
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/* # bytes of width*/
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if (!readlong(&nwidth))
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return NULL;
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/* variable font data*/
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pf->bits = (bitmap_t *)fileptr;
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for (i=0; i<nbits; ++i)
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if (!readshort(&pf->bits[i]))
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return NULL;
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/* pad to longword boundary*/
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fileptr = (unsigned char *)(((int)fileptr + 3) & ~3);
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if (noffset) {
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pf->offset = (unsigned long *)fileptr;
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for (i=0; i<noffset; ++i)
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if (!readlong(&pf->offset[i]))
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return NULL;
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}
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else
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pf->offset = NULL;
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if (nwidth) {
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pf->width = (unsigned char *)fileptr;
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fileptr += nwidth*sizeof(unsigned char);
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}
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else
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pf->width = NULL;
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if (fileptr > eofptr)
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return NULL;
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/* one-time rotate font bits to rockbox format*/
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rotate_font_bits(pf);
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return pf; /* success!*/
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}
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/*
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* Return a pointer to an incore font structure.
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* If the requested font isn't loaded/compiled-in,
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* decrement the font number and try again.
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*/
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struct font* font_get(int font)
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{
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struct font* pf;
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if (font >= MAXFONTS)
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font = 0;
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while (1) {
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pf = sysfonts[font];
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if (pf && pf->height)
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return pf;
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if (--font < 0)
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panicf("No font!");
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}
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}
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/* convert font bitmap data inplace to rockbox format*/
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static void rotate_font_bits(struct font* pf)
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{
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int i;
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unsigned long defaultchar = pf->defaultchar - pf->firstchar;
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bool did_defaultchar = false;
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unsigned char buf[256];
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for (i=0; i<pf->size; ++i) {
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bitmap_t *bits = pf->bits +
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(pf->offset ? pf->offset[i] : (pf->height * i));
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int width = pf->width? pf->width[i]: pf->maxwidth;
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int src_bytes = BITMAP_BYTES(width) * pf->height;
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/*
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* Due to the way the offset map works,
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* non-mapped characters are mapped to the default
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* character, and shouldn't be rotated twice.
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*/
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if (pf->offset && pf->offset[i] == defaultchar) {
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if (did_defaultchar)
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continue;
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did_defaultchar = true;
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}
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/* rotate left for lcd_bitmap function input*/
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rotleft(buf, bits, width, pf->height);
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/* copy back into original location*/
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memcpy(bits, buf, src_bytes);
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}
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}
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/*
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* Take an bitmap_t bitmap and convert to Rockbox format.
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* Used for converting font glyphs for the time being.
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* Can use for standard X11 and Win32 images as well.
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*
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* Doing it this way keeps fonts in standard formats,
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* as well as keeping Rockbox hw bitmap format.
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*/
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static void rotleft(unsigned char *dst, bitmap_t *src, unsigned int width,
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unsigned int height)
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{
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unsigned int i,j;
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unsigned int dst_col = 0; /* destination column*/
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unsigned int dst_shift = 0; /* destination shift amount*/
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unsigned int dst_linelen; /* # bytes per output row*/
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unsigned int src_words; /* # words of input image*/
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/* calc bytes per output row*/
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dst_linelen = (height-1)/8+1;
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/* calc words of input image*/
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src_words = BITMAP_WORDS(width) * height;
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/* clear background*/
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memset(dst, 0, dst_linelen*width);
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for (i=0; i < src_words; i++) {
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bitmap_t srcmap; /* current src input bit*/
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bitmap_t dstmap; /* current dst output bit*/
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/* calc src input bit*/
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srcmap = 1 << (sizeof(bitmap_t)*8-1);
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/* calc dst output bit*/
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if (i>0 && (i%8==0)) {
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++dst_col;
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dst_shift = 0;
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}
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dstmap = 1 << dst_shift++;
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/* for each input column...*/
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for(j=0; j < width; j++) {
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/* calc input bitmask*/
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bitmap_t bit = srcmap >> j;
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if (bit==0) {
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srcmap = 1 << (sizeof(bitmap_t)*8-1);
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bit = srcmap >> (j % 16);
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}
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/* if set in input, set in rotated output*/
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if (bit & src[i]) {
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/* input column j becomes output row*/
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dst[j*dst_linelen + dst_col] |= dstmap;
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}
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/*debugf((bit & src[i])? "*": ".");*/
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}
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/*debugf("\n");*/
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}
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}
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#endif /* HAVE_LCD_BITMAP */
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/* -----------------------------------------------------------------
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* local variables:
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* eval: (load-file "rockbox-mode.el")
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* vim: et sw=4 ts=8 sts=4 tw=78
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* end:
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*/
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