ref: 2f915be0ca122169285b9e6f9060675d645658d4
parent: 2bca368b854e226c243fd75085773b86bfbffb0f
author: Ali Gholami Rudi <ali@rudi.ir>
date: Fri Aug 15 07:37:04 EDT 2014
otf: remove length macros Following otf.c requires looking up the structures in the OpenType specification; defining the lengths of the structures or their offsets does not seem to help.
--- a/otf.c
+++ b/otf.c
@@ -19,11 +19,6 @@
#define S16(buf, off) ((s16) htons(*(u16 *) ((buf) + (off))))
#define S32(buf, off) ((s32) htonl(*(u32 *) ((buf) + (off))))
-#define OTFLEN 12 /* otf header length */
-#define OTFRECLEN 16 /* otf header record length */
-#define CMAPLEN 4 /* cmap header length */
-#define CMAPRECLEN 8 /* cmap record length */
-#define CMAP4LEN 8 /* format 4 cmap subtable header length */
#define GCTXLEN 16 /* number of context backtrack coverage arrays */
typedef unsigned int u32;
@@ -69,12 +64,10 @@
/* find the otf table with the given name */
static void *otf_table(void *otf, char *name)
{- void *recs = otf + OTFLEN; /* otf table records */
- void *rec; /* beginning of a table record */
int nrecs = U16(otf, 4);
int i;
for (i = 0; i < nrecs; i++) {- rec = recs + i * OTFRECLEN;
+ void *rec = otf + 12 + i * 16; /* an otf table record */
if (!strncmp(rec, name, 4))
return otf + U32(rec, 8);
}
@@ -135,19 +128,14 @@
/* parse otf cmap header */
static void otf_cmap(void *otf, void *cmap)
{- void *recs = cmap + CMAPLEN; /* cmap records */
- void *rec; /* a cmap record */
- void *tab; /* a cmap subtable */
- int plat, enc;
- int fmt;
int nrecs = U16(cmap, 2);
int i;
for (i = 0; i < nrecs; i++) {- rec = recs + i * CMAPRECLEN;
- plat = U16(rec, 0);
- enc = U16(rec, 2);
- tab = cmap + U32(rec, 4);
- fmt = U16(tab, 0);
+ void *rec = cmap + 4 + i * 8; /* a cmap record */
+ int plat = U16(rec, 0);
+ int enc = U16(rec, 2);
+ void *tab = cmap + U32(rec, 4); /* a cmap subtable */
+ int fmt = U16(tab, 0);
if (plat == 3 && enc == 1 && fmt == 4)
otf_cmap4(otf, tab);
}
@@ -158,8 +146,8 @@
void *post2; /* version 2.0 header */
void *index; /* glyph name indices */
void *names; /* glyph names */
- int i, idx;
int cname = 0;
+ int i;
if (U32(post, 0) != 0x00020000)
return;
post2 = post + 32;
@@ -167,7 +155,7 @@
index = post2 + 2;
names = index + 2 * glyph_n;
for (i = 0; i < glyph_n; i++) {- idx = U16(index, 2 * i);
+ int idx = U16(index, 2 * i);
if (idx <= 257) {strcpy(glyph_name[i], macset[idx]);
} else {@@ -217,24 +205,19 @@
static void otf_kern(void *otf, void *kern)
{- int n; /* number of kern subtables */
- void *tab; /* a kern subtable */
int off = 4;
- int npairs;
- int cov;
int i, j;
- int c1, c2, val;
- n = U16(kern, 2);
+ int n = U16(kern, 2); /* number of kern subtables */
for (i = 0; i < n; i++) {- tab = kern + off;
+ void *tab = kern + off; /* a kern subtable */
+ int cov = U16(tab, 4);
off += U16(tab, 2);
- cov = U16(tab, 4);
if ((cov >> 8) == 0 && (cov & 1)) { /* format 0 */- npairs = U16(tab, 6);
+ int npairs = U16(tab, 6);
for (j = 0; j < npairs; j++) {- c1 = U16(tab, 14 + 6 * j);
- c2 = U16(tab, 14 + 6 * j + 2);
- val = S16(tab, 14 + 6 * j + 4);
+ int c1 = U16(tab, 14 + 6 * j);
+ int c2 = U16(tab, 14 + 6 * j + 2);
+ int val = S16(tab, 14 + 6 * j + 4);
trfn_kern(glyph_name[c1], glyph_name[c2],
owid(val));
}
@@ -267,11 +250,10 @@
static int classdef(void *tab, int *gl, int *cls)
{int fmt = U16(tab, 0);
- int beg, end;
- int n, ngl = 0;
+ int ngl = 0;
int i, j;
if (fmt == 1) {- beg = U16(tab, 2);
+ int beg = U16(tab, 2);
ngl = U16(tab, 4);
for (i = 0; i < ngl; i++) {gl[i] = beg + i;
@@ -279,10 +261,10 @@
}
}
if (fmt == 2) {- n = U16(tab, 2);
+ int n = U16(tab, 2);
for (i = 0; i < n; i++) {- beg = U16(tab, 4 + 6 * i);
- end = U16(tab, 4 + 6 * i + 2);
+ int beg = U16(tab, 4 + 6 * i);
+ int end = U16(tab, 4 + 6 * i + 2);
for (j = beg; j <= end; j++) {gl[ngl] = j;
cls[ngl] = U16(tab, 4 + 6 * i + 4);
@@ -517,7 +499,6 @@
int cov[NGLYPHS];
int fmt = U16(sub, 0);
int ncov;
- int n;
int i;
ncov = coverage(sub + U16(sub, 2), cov);
if (fmt == 1) {@@ -531,7 +512,7 @@
}
}
if (fmt == 2) {- n = U16(sub, 4);
+ int n = U16(sub, 4);
for (i = 0; i < n; i++) { printf("gsub %s %d", feat, 2 + gctx_len(ctx, 1));gctx_backtrack(ctx);
@@ -702,13 +683,12 @@
void *scripts = gpos + U16(gpos, 4);
int nscripts, nlangs;
void *script;
- void *grec, *lrec;
char tag[8];
int i, j;
int n = 0;
nscripts = U16(scripts, 0);
for (i = 0; i < nscripts; i++) {- grec = scripts + 2 + 6 * i;
+ void *grec = scripts + 2 + 6 * i;
memcpy(tag, grec, 4);
tag[4] = '\0';
if (!trfn_script(tag, nscripts))
@@ -718,7 +698,7 @@
if (U16(script, 0) && trfn_lang(NULL, nlangs + (U16(script, 0) != 0)))
n += otf_lang(otf, gpos, script + U16(script, 0), lookups + n);
for (j = 0; j < nlangs; j++) {- lrec = script + 4 + 6 * j;
+ void *lrec = script + 4 + 6 * j;
memcpy(tag, lrec, 4);
tag[4] = '\0';
if (trfn_lang(tag, nlangs + (U16(script, 0) != 0)))