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CODE SNIPPET: static MagickBooleanType GetEXIFProperty(const Image *image, |
const char *property) |
{ |
#define MaxDirectoryStack 16 |
#define EXIF_DELIMITER "\n" |
#define EXIF_NUM_FORMATS 12 |
#define EXIF_FMT_BYTE 1 |
#define EXIF_FMT_STRING 2 |
#define EXIF_FMT_USHORT 3 |
#define EXIF_FMT_ULONG 4 |
#define EXIF_FMT_URATIONAL 5 |
#define EXIF_FMT_SBYTE 6 |
#define EXIF_FMT_UNDEFINED 7 |
#define EXIF_FMT_SSHORT 8 |
#define EXIF_FMT_SLONG 9 |
#define EXIF_FMT_SRATIONAL 10 |
#define EXIF_FMT_SINGLE 11 |
#define EXIF_FMT_DOUBLE 12 |
#define TAG_EXIF_OFFSET 0x8769 |
#define TAG_GPS_OFFSET 0x8825 |
#define TAG_INTEROP_OFFSET 0xa005 |
#define EXIFMultipleValues(size,format,arg) \ |
{ \ |
ssize_t \ |
component; \ |
\ |
size_t \ |
length; \ |
\ |
unsigned char \ |
*p1; \ |
\ |
length=0; \ |
p1=p; \ |
for (component=0; component < components; component++) \ |
{ \ |
length+=FormatLocaleString(buffer+length,MaxTextExtent-length, \ |
format", ",arg); \ |
if (length >= (MaxTextExtent-1)) \ |
length=MaxTextExtent-1; \ |
p1+=size; \ |
} \ |
if (length > 1) \ |
buffer[length-2]='\0'; \ |
value=AcquireString(buffer); \ |
} |
#define EXIFMultipleFractions(size,format,arg1,arg2) \ |
{ \ |
ssize_t \ |
component; \ |
\ |
size_t \ |
length; \ |
\ |
unsigned char \ |
*p1; \ |
\ |
length=0; \ |
p1=p; \ |
for (component=0; component < components; component++) \ |
{ \ |
length+=FormatLocaleString(buffer+length,MaxTextExtent-length, \ |
format", ",(arg1),(arg2)); \ |
if (length >= (MaxTextExtent-1)) \ |
length=MaxTextExtent-1; \ |
p1+=size; \ |
} \ |
if (length > 1) \ |
buffer[length-2]='\0'; \ |
value=AcquireString(buffer); \ |
} |
typedef struct _DirectoryInfo |
{ |
const unsigned char |
*directory; |
size_t |
entry; |
ssize_t |
offset; |
} DirectoryInfo; |
typedef struct _TagInfo |
{ |
size_t |
tag; |
const char |
description[36]; |
} TagInfo; |
static const TagInfo |
EXIFTag[] = |
{ |
{ 0x001, "exif:InteroperabilityIndex" }, |
{ 0x002, "exif:InteroperabilityVersion" }, |
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