New font format (already rotated) saves code, space and time. On the downside this new format is incompatible, so get the new fonts, too.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5015 a1c6a512-1295-4272-9138-f99709370657

5 files changed, 169 insertions, 167 deletions

diff --git a/apps/plugins/lib/gray_putsxy.c b/apps/plugins/lib/gray_putsxy.c
index 51f1ca1..20af8a3 100644
--- a/apps/plugins/lib/gray_putsxy.c
+++ b/apps/plugins/lib/gray_putsxy.c
@@ -37,7 +37,7 @@
 void gray_putsxy(int x, int y, const unsigned char *str)
 {
     int ch, width;
-    bitmap_t *bits;
+    unsigned char *bits;
     struct font *pf = _graybuf->curfont;
 
     if ((unsigned) x >= (unsigned) _graybuf->width
diff --git a/firmware/drivers/lcd-recorder.c b/firmware/drivers/lcd-recorder.c
index c9781e7..a791a79 100644
--- a/firmware/drivers/lcd-recorder.c
+++ b/firmware/drivers/lcd-recorder.c
@@ -407,14 +407,14 @@ static void lcd_putsxyofs(int x, int y, int ofs, const unsigned char *str)
         if (width > 0)
         {
             unsigned int i;
-            bitmap_t* bits = pf->bits +
+            unsigned char* bits = pf->bits +
                 (pf->offset ? pf->offset[ch] : (pf->height * ch));
 
             if (ofs != 0)
             {
                 for (i = 0; i < pf->height; i += 8)
                 {
-                    lcd_bitmap (((unsigned char*) bits) + ofs, x, y + i, width,
+                    lcd_bitmap (bits + ofs, x, y + i, width,
                                 MIN(8, pf->height - i), true);
                     bits = (bitmap_t *)((int)bits + gwidth);
                 }
diff --git a/firmware/export/font.h b/firmware/export/font.h
index 14a683a..fff7d05 100644
--- a/firmware/export/font.h
+++ b/firmware/export/font.h
@@ -72,7 +72,7 @@ enum {
  */
 
 /* loadable font magic and version #*/
-#define VERSION		"RB11"
+#define VERSION		"RB12"
 
 typedef unsigned short bitmap_t; /* bitmap image unit size*/
 
@@ -88,15 +88,14 @@ typedef unsigned short bitmap_t; /* bitmap image unit size*/
 /* builtin C-based proportional/fixed font structure */
 /* based on The Microwindows Project http://microwindows.org */
 struct font {
-    char *	name;		/* font name*/
     int		maxwidth;	/* max width in pixels*/
     unsigned int height;	/* height in pixels*/
     int		ascent;		/* ascent (baseline) height*/
     int		firstchar;	/* first character in bitmap*/
     int		size;		/* font size in glyphs*/
-    bitmap_t *bits;		/* 16-bit right-padded bitmap data*/
-    unsigned long *offset;	/* offsets into bitmap data*/
-    unsigned char *width;	/* character widths or NULL if fixed*/
+    const unsigned char *bits;		/* 8-bit column bitmap data*/
+    const unsigned short *offset;	/* offsets into bitmap data*/
+    const unsigned char *width;	/* character widths or NULL if fixed*/
     int		defaultchar;	/* default char (not glyph index)*/
     long	bits_size;	/* # words of bitmap_t bits*/
 };
diff --git a/firmware/font.c b/firmware/font.c
index 343dd0b..9d46e0d 100644
--- a/firmware/font.c
+++ b/firmware/font.c
@@ -53,15 +53,8 @@ static unsigned char *freeptr = mbuf;
 static unsigned char *fileptr;
 static unsigned char *eofptr;
 
-static void rotate_font_bits(const struct font* pf);
-static void rotleft(unsigned char *dst, 
-                    const bitmap_t *src,
-                    unsigned int width,
-                    unsigned int height);
-
 void font_init(void)
 {
-    rotate_font_bits(&sysfont);
     memset(&font_ui, 0, sizeof(struct font));
 }
 
@@ -95,25 +88,6 @@ static int readstr(char *buf, int count)
     return (fileptr <= eofptr)? count: 0;
 }
 
-/* read totlen bytes, return NUL terminated string*/
-/* may write 1 past buf[totlen]; removes blank pad*/
-static int readstrpad(char *buf, int totlen)
-{
-    char *p = buf;
-    int n = totlen;
-
-    while (--n >= 0)
-        *p++ = *fileptr++;
-    if (fileptr > eofptr)
-        return 0;
-
-    p = &buf[totlen];
-    *p-- = 0;
-    while (*p == ' ' && p >= buf)
-        *p-- = '\0';
-    return totlen;
-}
-
 void font_reset(void)
 {
     memset(&font_ui, 0, sizeof(struct font));
@@ -127,7 +101,6 @@ struct font* font_load(const char *path)
     unsigned long firstchar, defaultchar, size;
     unsigned long i, nbits, noffset, nwidth;
     char version[4+1];
-    char copyright[256+1];
     struct font* pf = &font_ui;
 
     /* open and read entire font file*/
@@ -163,15 +136,6 @@ struct font* font_load(const char *path)
     if (strcmp(version, VERSION) != 0)
         return NULL;
 
-    /* internal font name*/
-    pf->name = fileptr;
-    if (readstrpad(pf->name, 64) != 64)
-        return NULL;
-
-    /* copyright, not currently stored*/
-    if (readstrpad(copyright, 256) != 256)
-        return NULL;
-
     /* font info*/
     if (!readshort(&maxwidth))
         return NULL;
@@ -198,7 +162,6 @@ struct font* font_load(const char *path)
     /* # words of bitmap_t*/
     if (!readlong(&nbits))
         return NULL;
-    pf->bits_size = nbits;
 
     /* # longs of offset*/
     if (!readlong(&noffset))
@@ -209,18 +172,21 @@ struct font* font_load(const char *path)
         return NULL;
 
     /* variable font data*/
-    pf->bits = (bitmap_t *)fileptr;
-    for (i=0; i<nbits; ++i)
-        if (!readshort(&pf->bits[i]))
-            return NULL;
-    /* pad to longword boundary*/
-    fileptr = (unsigned char *)(((int)fileptr + 3) & ~3);
+    pf->bits = (unsigned char *)fileptr;
+    fileptr += nbits*sizeof(unsigned char);
+
+    /* pad to 16 bit boundary*/
+    fileptr = (unsigned char *)(((int)fileptr + 1) & ~1);
 
     if (noffset) {
-        pf->offset = (unsigned long *)fileptr;
+        pf->offset = (unsigned short *)fileptr;
         for (i=0; i<noffset; ++i)
-            if (!readlong(&pf->offset[i]))
+        {
+            unsigned short offset;
+            if (!readshort(&offset))
                 return NULL;
+            ((unsigned short*)(pf->offset))[i] = (unsigned short)offset;
+        }
     }
     else
         pf->offset = NULL;
@@ -235,9 +201,6 @@ struct font* font_load(const char *path)
     if (fileptr > eofptr)
         return NULL;
 
-    /* one-time rotate font bits to rockbox format*/
-    rotate_font_bits(pf);
-
     return pf;    /* success!*/
 }
 
@@ -262,93 +225,6 @@ struct font* font_get(int font)
     }
 }
 
-/* convert font bitmap data inplace to rockbox format*/
-static void rotate_font_bits(const struct font* pf)
-{
-    int i;
-    unsigned long defaultchar = pf->defaultchar - pf->firstchar;
-    bool did_defaultchar = false;
-    unsigned char buf[256];
-
-    for (i=0; i<pf->size; ++i) {
-        bitmap_t *bits = pf->bits +
-            (pf->offset ? pf->offset[i] : (pf->height * i));
-        int width = pf->width? pf->width[i]: pf->maxwidth;
-        int src_bytes = BITMAP_BYTES(width) * pf->height;
-
-        /*
-         * Due to the way the offset map works,
-         * non-mapped characters are mapped to the default
-         * character, and shouldn't be rotated twice.
-         */
-
-        if (pf->offset && pf->offset[i] == defaultchar) {
-            if (did_defaultchar)
-                continue;
-            did_defaultchar = true;
-        }
-
-        /* rotate left for lcd_bitmap function input*/
-        rotleft(buf, bits, width, pf->height);
-
-        /* copy back into original location*/
-        memcpy(bits, buf, src_bytes);
-    }
-}
-
-/*
- * Take an bitmap_t 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.
- * See format description in lcd-recorder.c
- *
- * Doing it this way keeps fonts in standard formats,
- * as well as keeping Rockbox hw bitmap format.
- */
-static void rotleft(unsigned char *dst, const bitmap_t *src,
-                    unsigned int width, unsigned int height)
-{
-    unsigned int i,j;
-    unsigned int src_words;        /* # words of input image*/
-    unsigned int dst_mask;      /* bit mask for destination */
-    bitmap_t src_mask;          /* bit mask for source */
-
-    /* calc words of input image*/
-    src_words = BITMAP_WORDS(width) * height;
-
-    /* clear background*/
-    memset(dst, 0, ((height + 7) / 8) * width);
-
-    dst_mask = 1;
-
-    for (i=0; i < src_words; i++) {
-
-        /* calc src input bit*/
-        src_mask = 1 << (sizeof (bitmap_t) * 8 - 1);
-        
-        /* for each input column...*/
-        for(j=0; j < width; j++) {
-
-            /* if set in input, set in rotated output */
-            if (src[i] & src_mask)
-                dst[j] |= dst_mask;
-
-            src_mask >>= 1;    /* next input bit */
-            if (src_mask == 0) /* input word done? */
-            {
-                src_mask = 1 << (sizeof (bitmap_t) * 8 - 1);
-                i++;           /* next input word */
-            }
-        }
-
-        dst_mask <<= 1;          /* next output bit (row) */
-        if (dst_mask > (1 << 7)) /* output bit > 7? */
-        {
-            dst_mask = 1;
-            dst += width;        /* next output byte row */
-        }
-    }
-}
 #endif /* HAVE_LCD_BITMAP */
 
 /* -----------------------------------------------------------------
diff --git a/tools/convbdf.c b/tools/convbdf.c
index ac88ea8..e369a91 100644
--- a/tools/convbdf.c
+++ b/tools/convbdf.c
@@ -12,9 +12,15 @@
 #include <string.h>
 #include <time.h>
 
+#define ROTATE /* define this for the new, rotated format */
+
 /* BEGIN font.h*/
 /* loadable font magic and version #*/
+#ifdef ROTATE
+#define VERSION		"RB12" /* newer version */
+#else
 #define VERSION		"RB11"
+#endif
 
 /* bitmap_t helper macros*/
 #define BITMAP_WORDS(x)         (((x)+15)/16)	/* image size in words*/
@@ -30,7 +36,6 @@ typedef unsigned short bitmap_t; /* bitmap image unit size*/
 /* builtin C-based proportional/fixed font structure */
 /* based on The Microwindows Project http://microwindows.org */
 struct font {
-    char *	name;		/* font name*/
     int		maxwidth;	/* max width in pixels*/
     int 	height;		/* height in pixels*/
     int		ascent;		/* ascent (baseline) height*/
@@ -43,6 +48,8 @@ struct font {
     long	bits_size;	/* # words of bitmap_t bits*/
     
     /* unused by runtime system, read in by convbdf*/
+    unsigned long* offrot;	/* offsets into rotated bitmap data*/
+    char *	name;		/* font name*/
     char *	facename;	/* facename of font*/
     char *	copyright;	/* copyright info for loadable fonts*/
     int		pixel_size;
@@ -259,6 +266,8 @@ void free_font(struct font* pf)
         free(pf->bits);
     if (pf->offset)
         free(pf->offset);
+    if (pf->offrot)
+        free(pf->offrot);
     if (pf->width)
         free(pf->width);
     free(pf);
@@ -426,9 +435,10 @@ int bdf_read_header(FILE *fp, struct font* pf)
     /* allocate bits, offset, and width arrays*/
     pf->bits = (bitmap_t *)malloc(pf->bits_size * sizeof(bitmap_t) + EXTRA);
     pf->offset = (unsigned long *)malloc(pf->size * sizeof(unsigned long));
+    pf->offrot = (unsigned long *)malloc(pf->size * sizeof(unsigned long));
     pf->width = (unsigned char *)malloc(pf->size * sizeof(unsigned char));
 	
-    if (!pf->bits || !pf->offset || !pf->width) {
+    if (!pf->bits || !pf->offset || !pf->offrot || !pf->width) {
         fprintf(stderr, "Error: no memory for font load\n");
         return 0;
     }
@@ -440,6 +450,7 @@ int bdf_read_header(FILE *fp, struct font* pf)
 int bdf_read_bitmaps(FILE *fp, struct font* pf)
 {
     long ofs = 0;
+    long ofr = 0;
     int maxwidth = 0;
     int i, k, encoding, width;
     int bbw, bbh, bbx, bby;
@@ -504,6 +515,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
                 continue;
             }
             pf->offset[encoding-pf->firstchar] = ofs;
+            pf->offrot[encoding-pf->firstchar] = ofr;
 
             /* calc char width*/
             if (bbx < 0) {
@@ -560,6 +572,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
             }
 
             ofs += BITMAP_WORDS(width) * pf->height;
+            ofr += pf->width[encoding-pf->firstchar] * ((pf->height+7)/8);
 
             continue;
         }
@@ -576,6 +589,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
 
         if (pf->offset[i] == (unsigned long)-1) {
             pf->offset[i] = pf->offset[defchar];
+            pf->offrot[i] = pf->offrot[defchar];
             pf->width[i] = pf->width[defchar];
         }
     }
@@ -622,6 +636,10 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
         }
     }
 
+#ifdef ROTATE
+    pf->bits_size = ofr; /* always update, rotated is smaller */
+#endif
+
     return 1;
 }
 
@@ -674,6 +692,62 @@ bitmap_t bdf_hexval(unsigned char *buf, int ndx1, int ndx2)
     return val;
 }
 
+/*
+ * Take an bitmap_t 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.
+ * See format description in lcd-recorder.c
+ *
+ * Doing it this way keeps fonts in standard formats,
+ * as well as keeping Rockbox hw bitmap format.
+ */
+int rotleft(unsigned char *dst, bitmap_t *src, unsigned int width,
+                    unsigned int height)
+{
+    unsigned int i,j;
+    unsigned int src_words;        /* # words of input image*/
+    unsigned int dst_mask;      /* bit mask for destination */
+    bitmap_t src_mask;          /* bit mask for source */
+
+    /* calc words of input image*/
+    src_words = BITMAP_WORDS(width) * height;
+
+    /* clear background*/
+    memset(dst, 0, ((height + 7) / 8) * width);
+
+    dst_mask = 1;
+
+    for (i=0; i < src_words; i++) {
+
+        /* calc src input bit*/
+        src_mask = 1 << (sizeof (bitmap_t) * 8 - 1);
+        
+        /* for each input column...*/
+        for(j=0; j < width; j++) {
+
+            /* if set in input, set in rotated output */
+            if (src[i] & src_mask)
+                dst[j] |= dst_mask;
+
+            src_mask >>= 1;    /* next input bit */
+            if (src_mask == 0) /* input word done? */
+            {
+                src_mask = 1 << (sizeof (bitmap_t) * 8 - 1);
+                i++;           /* next input word */
+            }
+        }
+
+        dst_mask <<= 1;          /* next output bit (row) */
+        if (dst_mask > (1 << 7)) /* output bit > 7? */
+        {
+            dst_mask = 1;
+            dst += width;        /* next output byte row */
+        }
+    }
+    return ((height + 7) / 8) * width; /* return result size in bytes */
+}
+
+
 /* generate C source from in-core font*/
 int gen_c_source(struct font* pf, char *path)
 {
@@ -704,7 +778,7 @@ int gen_c_source(struct font* pf, char *path)
         "*/\n"
         "\n"
         "/* Font character bitmap data. */\n"
-        "static bitmap_t _font_bits[] = {\n"
+        "static const unsigned char _font_bits[] = {\n"
     };
 
     ofp = fopen(path, "w");
@@ -786,6 +860,27 @@ int gen_c_source(struct font* pf, char *path)
             fprintf(ofp, " */\n");
 
         bits = pf->bits + (pf->offset? pf->offset[i]: (pf->height * i));
+#ifdef ROTATE /* pre-rotated into Rockbox bitmap format */
+        {
+          unsigned char bytemap[256];
+          int y8, ix=0;
+          
+          rotleft(bytemap, bits, width, pf->height);
+          ofs = (bitmap_t*)bytemap;
+          for (y8=0; y8<pf->height; y8+=8) /* column rows */
+          {
+            for (x=0; x<width; x++) {
+                fprintf(ofp, "0x%02x, ", bytemap[ix]);
+                if (!did_syncmsg && bytemap[ix] != *ofs++) {
+                    fprintf(stderr, "Warning: found encoding values in non-sorted order (not an error).\n");
+                    did_syncmsg = 1;
+                }
+                ix++;
+            }	
+            fprintf(ofp, "\n");
+          }
+        }
+#else
         for (x=BITMAP_WORDS(width)*pf->height; x>0; --x) {
             fprintf(ofp, "0x%04x,\n", *bits);
             if (!did_syncmsg && *bits++ != *ofs++) {
@@ -793,24 +888,29 @@ int gen_c_source(struct font* pf, char *path)
                 did_syncmsg = 1;
             }
         }	
+#endif
     }
     fprintf(ofp, "};\n\n");
 
     if (pf->offset) {
         /* output offset table*/
         fprintf(ofp, "/* Character->glyph mapping. */\n"
-                "static unsigned long _sysfont_offset[] = {\n");
+                "static const unsigned short _sysfont_offset[] = {\n");
 
         for (i=0; i<pf->size; ++i)
             fprintf(ofp, "  %ld,\t/* (0x%02x) */\n", 
+#ifdef ROTATE
+                    pf->offrot[i], i+pf->firstchar);
+#else
                     pf->offset[i], i+pf->firstchar);
+#endif
         fprintf(ofp, "};\n\n");
     }
 
     /* output width table for proportional fonts*/
     if (pf->width) {
         fprintf(ofp, "/* Character width data. */\n"
-                "static unsigned char _sysfont_width[] = {\n");
+                "static const unsigned char _sysfont_width[] = {\n");
 
         for (i=0; i<pf->size; ++i)
             fprintf(ofp, "  %d,\t/* (0x%02x) */\n", 
@@ -822,28 +922,25 @@ int gen_c_source(struct font* pf, char *path)
     if (pf->offset)
         sprintf(obuf, "_sysfont_offset,");
     else
-        sprintf(obuf, "0,  /* no encode table*/");
+        sprintf(obuf, "0,  /* no encode table */");
 
     if (pf->width)
-        sprintf(buf, "_sysfont_width,");
+        sprintf(buf, "_sysfont_width,  /* width */");
     else
-        sprintf(buf, "0,  /* fixed width*/");
+        sprintf(buf, "0,  /* fixed width */");
 
     fprintf(ofp, 	"/* Exported structure definition. */\n"
-            "struct font sysfont = {\n"
-            "  \"%s\",\n"
-            "  %d,\n"
-            "  %d,\n"
-            "  %d,\n"
-            "  %d,\n"
-            "  %d,\n"
-            "  _font_bits,\n"
+            "const struct font sysfont = {\n"
+            "  %d,  /* maxwidth */\n"
+            "  %d,  /* height */\n"
+            "  %d,  /* ascent */\n"
+            "  %d,  /* firstchar */\n"
+            "  %d,  /* size */\n"
+            "  _font_bits, /* bits */\n"
+            "  %s  /* offset */\n"
             "  %s\n"
-            "  %s\n"
-            "  %d,\n"
-            "  sizeof(_font_bits)/sizeof(bitmap_t),\n"
+            "  %d,  /* defaultchar */\n"
             "};\n",
-            pf->name,
             pf->maxwidth, pf->height,
             pf->ascent,
             pf->firstchar,
@@ -899,6 +996,7 @@ int gen_fnt_file(struct font* pf, char *path)
 {
     FILE *ofp;
     int i;
+    int did_defaultchar = 0;
 
     ofp = fopen(path, "wb");
     if (!ofp) {
@@ -908,13 +1006,13 @@ int gen_fnt_file(struct font* pf, char *path)
 
     /* write magic and version #*/
     writestr(ofp, VERSION, 4);
-
+#ifndef ROTATE
     /* internal font name*/
     writestrpad(ofp, pf->name, 64);
 
     /* copyright*/
     writestrpad(ofp, pf->copyright, 256);
-
+#endif
     /* font info*/
     writeshort(ofp, pf->maxwidth);
     writeshort(ofp, pf->height);
@@ -928,8 +1026,37 @@ int gen_fnt_file(struct font* pf, char *path)
     writelong(ofp, pf->bits_size);		  /* # words of bitmap_t*/
     writelong(ofp, pf->offset? pf->size: 0);  /* # longs of offset*/
     writelong(ofp, pf->width? pf->size: 0);	  /* # bytes of width*/
-
     /* variable font data*/
+#ifdef ROTATE
+    for (i=0; i<pf->size; ++i)
+    {
+        bitmap_t* bits = pf->bits + (pf->offset? pf->offset[i]: (pf->height * i));
+        int width = pf->width ? pf->width[i] : pf->maxwidth;
+        int size;  
+        unsigned char bytemap[256];
+  
+        if (pf->offset && 
+            (pf->offset[i] == pf->offset[pf->defaultchar-pf->firstchar])) {
+            if (did_defaultchar)
+                continue;
+            did_defaultchar = 1;
+        }
+
+        size = rotleft(bytemap, bits, width, pf->height);
+        writestr(ofp, bytemap, size);
+    }
+
+    if (ftell(ofp) & 1)
+        writebyte(ofp, 0);		/* pad to 16-bit boundary*/
+
+    if (pf->offset)
+        for (i=0; i<pf->size; ++i)
+            writeshort(ofp, pf->offrot[i]);
+
+    if (pf->width)
+        for (i=0; i<pf->size; ++i)
+            writebyte(ofp, pf->width[i]);
+#else
     for (i=0; i<pf->bits_size; ++i)
         writeshort(ofp, pf->bits[i]);
     if (ftell(ofp) & 2)
@@ -942,7 +1069,7 @@ int gen_fnt_file(struct font* pf, char *path)
     if (pf->width)
         for (i=0; i<pf->size; ++i)
             writebyte(ofp, pf->width[i]);
-
+#endif
     fclose(ofp);
     return 0;
 }