Greg Haerr's new loadable font. No more #ifdef font-style, removed old

propfont and loadable font code. New font file format.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2269 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 228 insertions, 0 deletions

diff --git a/firmware/font.c b/firmware/font.c
new file mode 100644
index 0000000000..5bde2ff1bc
--- /dev/null
+++ b/firmware/font.c
@@ -0,0 +1,228 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (c) 2002 by Greg Haerr <greg@censoft.com>
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+/*
+ * Rockbox startup font initialization
+ * This file specifies which fonts get compiled-in and
+ * loaded at startup, as well as their mapping into
+ * the FONT_SYSFIXED, FONT_UI and FONT_MP3 ids.
+ */
+#include "config.h"
+
+#if defined(HAVE_LCD_BITMAP) || defined(SIMULATOR)
+
+#include <stdio.h>
+#include <string.h>
+#include "lcd.h"
+#include "font.h"
+#include "debug.h"
+#include "panic.h"
+
+/* available compiled-in fonts*/
+extern MWCFONT font_X5x8;
+/*extern MWCFONT font_X6x9; */
+/*extern MWCFONT font_courB08; */
+/*extern MWCFONT font_timR08; */
+
+/* structure filled in by rbf_load_font*/
+static MWCFONT font_UI;
+
+/* system font table, in order of FONT_xxx definition*/
+struct corefont sysfonts[MAXFONTS] = {
+    { &font_X5x8, NULL          }, /* compiled-in FONT_SYSFIXED*/
+    { &font_UI,   "/system.fnt" }, /* loaded FONT_UI*/
+    { NULL,       NULL          }, /* no FONT_MP3*/
+};
+
+void
+font_init(void)
+{
+    struct corefont *cfp;
+
+    for (cfp=sysfonts; cfp < &sysfonts[MAXFONTS]; ++cfp) {
+        if (cfp->pf && cfp->diskname) {
+            cfp->pf = rbf_load_font(cfp->diskname, cfp->pf);
+#if defined(DEBUG) || defined(SIMULATOR)
+            if (!cfp->pf)
+                DEBUGF("Font load failed: %s\n", cfp->diskname);
+#endif
+        }
+    }
+}
+
+/*
+ * Return a pointer to an incore font structure.
+ * If the requested font isn't loaded/compiled-in,
+ * decrement the font number and try again.
+ */
+PMWCFONT
+getfont(int font)
+{
+    PMWCFONT pf;
+
+    while (1) {
+        pf = sysfonts[font].pf;
+        if (pf && pf->height)
+            return pf;
+        if (--font < 0)
+            panicf("No font!");
+    }
+}
+
+/*
+ * Return width and height of a given font.
+ */
+void lcd_getfontsize(int font, int *width, int *height)
+{
+   PMWCFONT pf = getfont(font);
+
+   *width =  pf->maxwidth;
+   *height = pf->height;
+}
+
+/*
+ * Return width and height of a given font.
+ */
+//FIXME rename to font_gettextsize, add baseline
+int
+lcd_getstringsize(unsigned char *str, int font, int *w, int *h)
+{
+    PMWCFONT pf = getfont(font);
+    int ch;
+    int width = 0;
+
+    while((ch = *str++)) {
+
+        /* check input range*/
+        if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
+                ch = pf->defaultchar;
+        ch -= pf->firstchar;
+
+        /* get proportional width and glyph bits*/
+        width += pf->width? pf->width[ch]: pf->maxwidth;
+    }
+    *w = width;
+    *h = pf->height;
+
+    return width;
+}
+
+/*
+ * Take an MWIMAGEBITS bitmap and convert to Rockbox format.
+ * Used for converting font glyphs for the time being.
+ * Can use for standard X11 and Win32 images as well.
+ *
+ * Doing it this way keeps fonts in standard formats,
+ * as well as keeping Rockbox hw bitmap format.
+ */
+static void
+rotleft(unsigned char *dst, MWIMAGEBITS *src, unsigned int width,
+        unsigned int height)
+{
+    unsigned int i,j;
+    unsigned int dst_col = 0;           /* destination column*/
+    unsigned int dst_shift = 0;         /* destination shift amount*/
+    unsigned int dst_linelen;           /* # bytes per output row*/
+    unsigned int src_words;             /* # words of input image*/
+    
+    /* calc bytes per output row*/
+    dst_linelen = (height-1)/8+1;
+
+    /* calc words of input image*/
+    src_words = MWIMAGE_WORDS(width) * height;
+
+    /* clear background*/
+    memset(dst, 0, dst_linelen*height);
+
+    for (i=0; i < src_words; i++) {
+        MWIMAGEBITS srcmap;     /* current src input bit*/
+        MWIMAGEBITS dstmap;     /* current dst output bit*/
+        
+        /* calc src input bit*/
+        srcmap = 1 << (sizeof(MWIMAGEBITS)*8-1);
+
+        /* calc dst output bit*/
+        if (i>0 && (i%8==0)) {
+            ++dst_col;
+            dst_shift = 0;
+        }
+        dstmap = 1 << dst_shift++;
+
+        /* for each input column...*/
+        for(j=0; j < width; j++) {
+
+            /* calc input bitmask*/
+            MWIMAGEBITS bit = srcmap >> j;
+            if (bit==0) {
+                srcmap = 1 << (sizeof(MWIMAGEBITS)*8-1);
+                bit = srcmap >> (j % 16);
+            }
+
+            /* if set in input, set in rotated output*/
+            if (bit & src[i]) {
+                /* input column j becomes output row*/
+                dst[j*dst_linelen + dst_col] |= dstmap;
+            }
+            //printf((bit & src[i])? "*": ".");
+        }
+        //printf("\n");
+    }
+}
+
+/*
+ * Put a string at specified bit position
+ */
+//FIXME rename font_putsxy?
+void
+lcd_putsxy(int x, int y, unsigned char *str, int font)
+{
+    int ch;
+    unsigned char *src;
+    PMWCFONT pf = getfont(font);
+
+    while (((ch = *str++) != '\0')) {
+        MWIMAGEBITS *bits;
+        int width;
+        unsigned char outbuf[256];
+
+        /* check input range*/
+        if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
+                ch = pf->defaultchar;
+        ch -= pf->firstchar;
+
+        /* get proportional width and glyph bits*/
+        width = pf->width? pf->width[ch]: pf->maxwidth;
+        if(x + width > LCD_WIDTH)
+            break;
+        bits = pf->bits + (pf->offset? pf->offset[ch]: (pf->height * ch));
+
+        /* rotate left for lcd_bitmap function input*/
+        rotleft(outbuf, bits, width, pf->height);
+        src = outbuf;
+
+        lcd_bitmap (src, x, y, width, pf->height, true);
+        x += width;
+    }
+}
+#endif /* HAVE_LCD_BITMAP */
+
+/* -----------------------------------------------------------------
+ * local variables:
+ * eval: (load-file "rockbox-mode.el")
+ * end:
+ */