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-rw-r--r--src/main/bit-ops.c242
1 files changed, 220 insertions, 22 deletions
diff --git a/src/main/bit-ops.c b/src/main/bit-ops.c
index 063348d..ab111ca 100644
--- a/src/main/bit-ops.c
+++ b/src/main/bit-ops.c
@@ -1,5 +1,5 @@
/*
- * "$Id: bit-ops.c,v 1.9 2006/03/28 03:27:57 rlk Exp $"
+ * "$Id: bit-ops.c,v 1.9.8.2 2007/05/12 19:14:27 faust3 Exp $"
*
* Softweave calculator for Gutenprint.
*
@@ -73,6 +73,201 @@ stp_fold(const unsigned char *line,
}
}
+void
+stp_fold_3bit(const unsigned char *line,
+ int single_length,
+ unsigned char *outbuf)
+{
+ int i;
+ memset(outbuf, 0, single_length * 3);
+ for (i = 0; i < single_length; i++) {
+ outbuf[0] =
+ ((line[0] & (1 << 7)) >> 2) |
+ ((line[0] & (1 << 6)) >> 4) |
+ ((line[single_length] & (1 << 7)) >> 1) |
+ ((line[single_length] & (1 << 6)) >> 3) |
+ ((line[single_length] & (1 << 5)) >> 5) |
+ ((line[2*single_length] & (1 << 7)) << 0) |
+ ((line[2*single_length] & (1 << 6)) >> 2) |
+ ((line[2*single_length] & (1 << 5)) >> 4);
+ outbuf[1] =
+ ((line[0] & (1 << 5)) << 2) |
+ ((line[0] & (1 << 4)) << 0) |
+ ((line[0] & (1 << 3)) >> 2) |
+ ((line[single_length] & (1 << 4)) << 1) |
+ ((line[single_length] & (1 << 3)) >> 1) |
+ ((line[2*single_length] & (1 << 4)) << 2) |
+ ((line[2*single_length] & (1 << 3)) << 0) |
+ ((line[2*single_length] & (1 << 2)) >> 2);
+ outbuf[2] =
+ ((line[0] & (1 << 2)) << 4) |
+ ((line[0] & (1 << 1)) << 2) |
+ ((line[0] & (1 << 0)) << 0) |
+ ((line[single_length] & (1 << 2)) << 5) |
+ ((line[single_length] & (1 << 1)) << 3) |
+ ((line[single_length] & (1 << 0)) << 1) |
+ ((line[2*single_length] & (1 << 1)) << 4) |
+ ((line[2*single_length] & (1 << 0)) << 2);
+ line++;
+ outbuf += 3;
+ }
+}
+
+void
+stp_fold_3bit_323(const unsigned char *line,
+ int single_length,
+ unsigned char *outbuf)
+{
+ unsigned char A0,A1,A2,B0,B1,B2,C0,C1,C2;
+ const unsigned char *last= line+single_length;
+ memset(outbuf, 0, single_length * 3);
+ for (; line < last; line+=3, outbuf+=8) {
+
+ A0= line[0]; B0= line[single_length]; C0= line[2*single_length];
+
+ if (line<last-2) {
+ A1= line[1]; B1= line[single_length+1]; C1= line[2*single_length+1];
+ } else {
+ A1= 0; B1= 0; C1= 0;
+ }
+ if (line<last-1) {
+ A2= line[2]; B2= line[single_length+2]; C2= line[2*single_length+2];
+ } else {
+ A2= 0; B2= 0; C2= 0;
+ }
+
+ outbuf[0] =
+ ((C0 & 0x80) >> 0) |
+ ((B0 & 0x80) >> 1) |
+ ((A0 & 0x80) >> 2) |
+ ((B0 & 0x40) >> 2) |
+ ((A0 & 0x40) >> 3) |
+ ((C0 & 0x20) >> 3) |
+ ((B0 & 0x20) >> 4) |
+ ((A0 & 0x20) >> 5);
+ outbuf[1] =
+ ((C0 & 0x10) << 3) |
+ ((B0 & 0x10) << 2) |
+ ((A0 & 0x10) << 1) |
+ ((B0 & 0x08) << 1) |
+ ((A0 & 0x08) << 0) |
+ ((C0 & 0x04) >> 0) |
+ ((B0 & 0x04) >> 1) |
+ ((A0 & 0x04) >> 2);
+ outbuf[2] =
+ ((C0 & 0x02) << 6) |
+ ((B0 & 0x02) << 5) |
+ ((A0 & 0x02) << 4) |
+ ((B0 & 0x01) << 4) |
+ ((A0 & 0x01) << 3) |
+ ((C1 & 0x80) >> 5) |
+ ((B1 & 0x80) >> 6) |
+ ((A1 & 0x80) >> 7);
+ outbuf[3] =
+ ((C1 & 0x40) << 1) |
+ ((B1 & 0x40) << 0) |
+ ((A1 & 0x40) >> 1) |
+ ((B1 & 0x20) >> 1) |
+ ((A1 & 0x20) >> 2) |
+ ((C1 & 0x10) >> 2) |
+ ((B1 & 0x10) >> 3) |
+ ((A1 & 0x10) >> 4);
+ outbuf[4] =
+ ((C1 & 0x08) << 4) |
+ ((B1 & 0x08) << 3) |
+ ((A1 & 0x08) << 2) |
+ ((B1 & 0x04) << 2) |
+ ((A1 & 0x04) << 1) |
+ ((C1 & 0x02) << 1) |
+ ((B1 & 0x02) >> 0) |
+ ((A1 & 0x02) >> 1);
+ outbuf[5] =
+ ((C1 & 0x01) << 7) |
+ ((B1 & 0x01) << 6) |
+ ((A1 & 0x01) << 5) |
+ ((B2 & 0x80) >> 3) |
+ ((A2 & 0x80) >> 4) |
+ ((C2 & 0x40) >> 4) |
+ ((B2 & 0x40) >> 5) |
+ ((A2 & 0x40) >> 6);
+ outbuf[6] =
+ ((C2 & 0x20) << 2) |
+ ((B2 & 0x20) << 1) |
+ ((A2 & 0x20) << 0) |
+ ((B2 & 0x10) >> 0) |
+ ((A2 & 0x10) >> 1) |
+ ((C2 & 0x08) >> 1) |
+ ((B2 & 0x08) >> 2) |
+ ((A2 & 0x08) >> 3);
+ outbuf[7] =
+ ((C2 & 0x04) << 5) |
+ ((B2 & 0x04) << 4) |
+ ((A2 & 0x04) << 3) |
+ ((B2 & 0x02) << 3) |
+ ((A2 & 0x02) << 2) |
+ ((C2 & 0x01) << 2) |
+ ((B2 & 0x01) << 1) |
+ ((A2 & 0x01) << 0);
+ }
+}
+
+void
+stp_fold_4bit(const unsigned char *line,
+ int single_length,
+ unsigned char *outbuf)
+{
+ int i;
+ memset(outbuf, 0, single_length * 4);
+ for (i = 0; i < single_length; i++){
+ unsigned char l0 = line[0];
+ unsigned char l1 = line[single_length];
+ unsigned char l2 = line[single_length*2];
+ unsigned char l3 = line[single_length*3];
+ if(l0 || l1 || l2 || l3){
+ outbuf[0] =
+ ((l3 & (1<<7)) >> 0)|
+ ((l2 & (1<<7)) >> 1)|
+ ((l1 & (1<<7)) >> 2)|
+ ((l0 & (1<<7)) >> 3)|
+ ((l3 & (1<<6)) >> 3)|
+ ((l2 & (1<<6)) >> 4)|
+ ((l1 & (1<<6)) >> 5)|
+ ((l0 & (1<<6)) >> 6);
+
+ outbuf[1] =
+ ((l3 & (1<<5)) << 2)|
+ ((l2 & (1<<5)) << 1)|
+ ((l1 & (1<<5)) << 0)|
+ ((l0 & (1<<5)) >> 1)|
+ ((l3 & (1<<4)) >> 1)|
+ ((l2 & (1<<4)) >> 2)|
+ ((l1 & (1<<4)) >> 3)|
+ ((l0 & (1<<4)) >> 4);
+
+ outbuf[2] =
+ ((l3 & (1<<3)) << 4)|
+ ((l2 & (1<<3)) << 3)|
+ ((l1 & (1<<3)) << 2)|
+ ((l0 & (1<<3)) << 1)|
+ ((l3 & (1<<2)) << 1)|
+ ((l2 & (1<<2)) << 0)|
+ ((l1 & (1<<2)) >> 1)|
+ ((l0 & (1<<2)) >> 2);
+ outbuf[3] =
+ ((l3 & (1<<1)) << 6)|
+ ((l2 & (1<<1)) << 5)|
+ ((l1 & (1<<1)) << 4)|
+ ((l0 & (1<<1)) << 3)|
+ ((l3 & (1<<0)) << 3)|
+ ((l2 & (1<<0)) << 2)|
+ ((l1 & (1<<0)) << 1)|
+ ((l0 & (1<<0)) << 0);
+ }
+ line++;
+ outbuf += 4;
+ }
+}
+
static void
stpi_split_2_1(int length,
const unsigned char *in,
@@ -950,27 +1145,30 @@ stpi_unpack_16_2(int length,
if (tempin & 3)
temp[7] |= ((tempin & 3) << 6) >> shift;
- tempin = *in++;
-
- if (tempin & 192)
- temp[8] |= (tempin & 192) >> shift;
- if (tempin & 48)
- temp[9] |= ((tempin & 48) << 2) >> shift;
- if (tempin & 12)
- temp[10] |= ((tempin & 12) << 4) >> shift;
- if (tempin & 3)
- temp[11] |= ((tempin & 3) << 6) >> shift;
-
- tempin = *in++;
-
- if (tempin & 192)
- temp[12] |= (tempin & 192) >> shift;
- if (tempin & 48)
- temp[13] |= ((tempin & 48) << 2) >> shift;
- if (tempin & 12)
- temp[14] |= ((tempin & 12) << 4) >> shift;
- if (tempin & 3)
- temp[15] |= ((tempin & 3) << 6) >> shift;
+ if (length-- > 0)
+ {
+ tempin = *in++;
+
+ if (tempin & 192)
+ temp[8] |= (tempin & 192) >> shift;
+ if (tempin & 48)
+ temp[9] |= ((tempin & 48) << 2) >> shift;
+ if (tempin & 12)
+ temp[10] |= ((tempin & 12) << 4) >> shift;
+ if (tempin & 3)
+ temp[11] |= ((tempin & 3) << 6) >> shift;
+
+ tempin = *in++;
+
+ if (tempin & 192)
+ temp[12] |= (tempin & 192) >> shift;
+ if (tempin & 48)
+ temp[13] |= ((tempin & 48) << 2) >> shift;
+ if (tempin & 12)
+ temp[14] |= ((tempin & 12) << 4) >> shift;
+ if (tempin & 3)
+ temp[15] |= ((tempin & 3) << 6) >> shift;
+ }
if (shift < 6)
shift += 2;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 16:45:47 +0000