aboutsummaryrefslogtreecommitdiff
path: root/graphics/jpeg-mmx/files/patch-rdjpgcom.c
diff options
context:
space:
mode:
Diffstat (limited to 'graphics/jpeg-mmx/files/patch-rdjpgcom.c')
-rw-r--r--graphics/jpeg-mmx/files/patch-rdjpgcom.c218
1 files changed, 0 insertions, 218 deletions
diff --git a/graphics/jpeg-mmx/files/patch-rdjpgcom.c b/graphics/jpeg-mmx/files/patch-rdjpgcom.c
deleted file mode 100644
index db6bd23c249f..000000000000
--- a/graphics/jpeg-mmx/files/patch-rdjpgcom.c
+++ /dev/null
@@ -1,218 +0,0 @@
---- rdjpgcom.c.orig Sun Oct 12 00:41:04 1997
-+++ rdjpgcom.c Thu Mar 18 06:37:23 2004
-@@ -14,6 +14,7 @@
- #define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
- #include "jinclude.h" /* get auto-config symbols, <stdio.h> */
-
-+#include <locale.h> /* to declare setlocale() */
- #include <ctype.h> /* to declare isupper(), tolower() */
- #ifdef USE_SETMODE
- #include <fcntl.h> /* to declare setmode()'s parameter macros */
-@@ -120,6 +121,7 @@
- #define M_EOI 0xD9 /* End Of Image (end of datastream) */
- #define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
- #define M_APP0 0xE0 /* Application-specific marker, type N */
-+#define M_APP1 0xE1 /* Typically EXIF marker */
- #define M_APP12 0xEC /* (we don't bother to list all 16 APPn's) */
- #define M_COM 0xFE /* COMment */
-
-@@ -210,6 +212,175 @@
- }
- }
-
-+/*
-+ * Helper routine to skip the given number of bytes.
-+ */
-+
-+static void
-+skip_n (unsigned int length)
-+{
-+ while (length > 0) {
-+ (void) read_1_byte();
-+ length--;
-+ }
-+}
-+
-+/*
-+ * Parses an APP1 marker looking for EXIF data. If EXIF, the orientation is
-+ * reported to stdout.
-+ */
-+
-+static void
-+process_APP1 (void)
-+{
-+ unsigned int length, i;
-+ int is_motorola; /* byte order indicator */
-+ unsigned int offset, number_of_tags, tagnum;
-+ int orientation;
-+ char *ostr;
-+ /* This 64K buffer would probably be best if allocated dynamically, but it's
-+ * the only one on this program so it's really not that
-+ * important. Allocating on the stack is not an option, as 64K might be too
-+ * big for some (crippled) platforms. */
-+ static unsigned char exif_data[65536L];
-+
-+ /* Get the marker parameter length count */
-+ length = read_2_bytes();
-+ /* Length includes itself, so must be at least 2 */
-+ if (length < 2)
-+ ERREXIT("Erroneous JPEG marker length");
-+ length -= 2;
-+
-+ /* We only care if APP1 is really an EXIF marker. Minimum length is 6 for
-+ * signature plus 12 for an IFD. */
-+ if (length < 18) {
-+ skip_n(length);
-+ return;
-+ }
-+
-+ /* Check for actual EXIF marker */
-+ for (i=0; i < 6; i++)
-+ exif_data[i] = (unsigned char) read_1_byte();
-+ length -= 6;
-+ if (exif_data[0] != 0x45 ||
-+ exif_data[1] != 0x78 ||
-+ exif_data[2] != 0x69 ||
-+ exif_data[3] != 0x66 ||
-+ exif_data[4] != 0 ||
-+ exif_data[5] != 0) {
-+ skip_n(length);
-+ return;
-+ }
-+
-+ /* Read all EXIF body */
-+ for (i=0; i < length; i++)
-+ exif_data[i] = (unsigned char) read_1_byte();
-+
-+ /* Discover byte order */
-+ if (exif_data[0] == 0x49 && exif_data[1] == 0x49)
-+ is_motorola = 0;
-+ else if (exif_data[0] == 0x4D && exif_data[1] == 0x4D)
-+ is_motorola = 1;
-+ else
-+ return;
-+
-+ /* Check Tag Mark */
-+ if (is_motorola) {
-+ if (exif_data[2] != 0) return;
-+ if (exif_data[3] != 0x2A) return;
-+ } else {
-+ if (exif_data[3] != 0) return;
-+ if (exif_data[2] != 0x2A) return;
-+ }
-+
-+ /* Get first IFD offset (offset to IFD0) */
-+ if (is_motorola) {
-+ if (exif_data[4] != 0) return;
-+ if (exif_data[5] != 0) return;
-+ offset = exif_data[6];
-+ offset <<= 8;
-+ offset += exif_data[7];
-+ } else {
-+ if (exif_data[7] != 0) return;
-+ if (exif_data[6] != 0) return;
-+ offset = exif_data[5];
-+ offset <<= 8;
-+ offset += exif_data[4];
-+ }
-+ if (offset > length - 2) return; /* check end of data segment */
-+
-+ /* Get the number of directory entries contained in this IFD */
-+ if (is_motorola) {
-+ number_of_tags = exif_data[offset];
-+ number_of_tags <<= 8;
-+ number_of_tags += exif_data[offset+1];
-+ } else {
-+ number_of_tags = exif_data[offset+1];
-+ number_of_tags <<= 8;
-+ number_of_tags += exif_data[offset];
-+ }
-+ if (number_of_tags == 0) return;
-+ offset += 2;
-+
-+ /* Search for Orientation Tag in IFD0 */
-+ for (;;) {
-+ if (offset > length - 12) return; /* check end of data segment */
-+ /* Get Tag number */
-+ if (is_motorola) {
-+ tagnum = exif_data[offset];
-+ tagnum <<= 8;
-+ tagnum += exif_data[offset+1];
-+ } else {
-+ tagnum = exif_data[offset+1];
-+ tagnum <<= 8;
-+ tagnum += exif_data[offset];
-+ }
-+ if (tagnum == 0x0112) break; /* found Orientation Tag */
-+ if (--number_of_tags == 0) return;
-+ offset += 12;
-+ }
-+
-+ /* Get the Orientation value */
-+ if (is_motorola) {
-+ if (exif_data[offset+8] != 0) return;
-+ orientation = exif_data[offset+9];
-+ } else {
-+ if (exif_data[offset+9] != 0) return;
-+ orientation = exif_data[offset+8];
-+ }
-+ if (orientation == 0 || orientation > 8) return;
-+
-+ /* Print the orientation (position of the 0th row - 0th column) */
-+ switch (orientation) {
-+ case 1:
-+ ostr = "top-left";
-+ break;
-+ case 2:
-+ ostr = "top-right";
-+ break;
-+ case 3:
-+ ostr = "bottom-right";
-+ break;
-+ case 4:
-+ ostr = "bottom-left";
-+ break;
-+ case 5:
-+ ostr = "left-top";
-+ break;
-+ case 6:
-+ ostr = "right-top";
-+ break;
-+ case 7:
-+ ostr = "right-bottom";
-+ break;
-+ case 8:
-+ ostr = "left-bottom";
-+ break;
-+ default:
-+ return;
-+ }
-+ printf("EXIF orientation: %s\n",ostr);
-+}
-
- /*
- * Process a COM marker.
-@@ -231,6 +402,7 @@
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
-
-+ setlocale(LC_ALL, "");
- while (length > 0) {
- ch = read_1_byte();
- /* Emit the character in a readable form.
-@@ -363,6 +535,15 @@
-
- case M_COM:
- process_COM();
-+ break;
-+
-+ case M_APP1:
-+ /* APP1 is usually the EXIF marker used by digital cameras, attempt to
-+ * process it to give some useful info. */
-+ if (verbose) {
-+ process_APP1();
-+ } else
-+ skip_variable();
- break;
-
- case M_APP12:
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-15 18:33:06 +0000