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Provide information about how the font could be reduced without glyph clipping

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20307 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Alexander Levin 2009-03-12 19:55:07 +00:00
parent 74aba34b58
commit d59e310375
1 changed files with 24 additions and 9 deletions
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33
tools/convbdf.c
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@ -57,6 +57,8 @@ struct font {
int nchars_declared; /* number of glyphs as declared in the header */ int nchars_declared; /* number of glyphs as declared in the header */
int ascent_declared; /* ascent as declared in the header */ int ascent_declared; /* ascent as declared in the header */
int descent_declared; /* descent as declared in the header */ int descent_declared; /* descent as declared in the header */
int max_char_ascent; /* max. char ascent (before adjusting) */
int max_char_descent; /* max. char descent (before adjusting) */
unsigned int* offrot; /* offsets into rotated bitmap data */ unsigned int* offrot; /* offsets into rotated bitmap data */
char* name; /* font name */ char* name; /* font name */
char* facename; /* facename of font */ char* facename; /* facename of font */
@ -503,6 +505,16 @@ struct font* bdf_read_font(char *path)
print_warning(VL_CLIP_FONT, "Generated font's height: %d\n", pf->height); print_warning(VL_CLIP_FONT, "Generated font's height: %d\n", pf->height);
} }
if (pf->ascent > pf->max_char_ascent) {
print_trace("Font's ascent could be reduced by %d to %d without clipping\n",
(pf->ascent - pf->max_char_ascent), pf->max_char_ascent);
}
if (pf->descent > pf->max_char_descent) {
print_trace("Font's descent could be reduced by %d to %d without clipping\n",
(pf->descent - pf->max_char_descent), pf->max_char_descent);
}
/* Alocate memory */ /* Alocate memory */
pf->bits_size = pf->size * BITMAP_WORDS(pf->maxwidth) * pf->height; pf->bits_size = pf->size * BITMAP_WORDS(pf->maxwidth) * pf->height;
pf->bits = (bitmap_t *)malloc(pf->bits_size * sizeof(bitmap_t)); pf->bits = (bitmap_t *)malloc(pf->bits_size * sizeof(bitmap_t));
@ -935,7 +947,7 @@ void bdf_correct_bbx(int *width, int *bbx) {
int bdf_analyze_font(FILE *fp, struct font* pf) { int bdf_analyze_font(FILE *fp, struct font* pf) {
char buf[256]; char buf[256];
int encoding; int encoding;
int width, bbw, bbh, bbx, bby, overflow; int width, bbw, bbh, bbx, bby, ascent, overflow;
int read_enc = 0, read_width = 0, read_bbx = 0, read_endchar = 1; int read_enc = 0, read_width = 0, read_bbx = 0, read_endchar = 1;
int ignore_char = 0; int ignore_char = 0;
@ -944,6 +956,7 @@ int bdf_analyze_font(FILE *fp, struct font* pf) {
pf->maxwidth = 0; pf->maxwidth = 0;
pf->nchars = 0; pf->nchars = 0;
pf->max_char_ascent = pf->max_char_descent = 0;
pf->max_over_ascent = pf->max_over_descent = 0; pf->max_over_ascent = pf->max_over_descent = 0;
for (;;) { for (;;) {
@ -983,14 +996,16 @@ int bdf_analyze_font(FILE *fp, struct font* pf) {
if (width > pf->maxwidth) { if (width > pf->maxwidth) {
pf->maxwidth = width; pf->maxwidth = width;
} }
overflow = bby + bbh - pf->ascent;
if (overflow > pf->max_over_ascent) { ascent = bby + bbh;
pf->max_over_ascent = overflow; pf->max_char_ascent = MAX(pf->max_char_ascent, ascent);
} overflow = ascent - pf->ascent;
overflow = -bby - pf->descent; pf->max_over_ascent = MAX(pf->max_over_ascent, overflow);
if (overflow > pf->max_over_descent) {
pf->max_over_descent = overflow; ascent = -bby;
} pf->max_char_descent = MAX(pf->max_char_descent, ascent);
overflow = ascent - pf->descent;
pf->max_over_descent = MAX(pf->max_over_descent, overflow);
} }
pf->nchars++; pf->nchars++;
read_endchar = 1; read_endchar = 1;