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Implement missing tag types and signed 64-bit support

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Kal Conley committed 2021-03-17 01:24:32 +01:00
1 parent 2cba04dfe7
commit d086e289dd
8 files changed
+334 -14
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src/decoder/ifd.rs
+57 -6
View File
@@ -10,8 +10,8 @@ use crate::tags::{Tag, Type};
use crate::{TiffError, TiffFormatError, TiffResult};
use self::Value::{
Ascii, Byte, Double, Float, List, Rational, RationalBig, SRational, SRationalBig, Short,
Signed, SignedBig, Unsigned, UnsignedBig,
Ascii, Byte, Double, Float, Ifd, IfdBig, List, Rational, RationalBig, SRational, SRationalBig,
Short, Signed, SignedBig, Unsigned, UnsignedBig,
};
#[allow(unused_qualifications)]
@@ -31,6 +31,8 @@ pub enum Value {
SRational(i32, i32),
SRationalBig(i64, i64),
Ascii(String),
Ifd(u32),
IfdBig(u64),
#[doc(hidden)] // Do not match against this.
__NonExhaustive,
}
@@ -59,6 +61,8 @@ impl Value {
Short(val) => Ok(val.into()),
Unsigned(val) => Ok(val),
UnsignedBig(val) => Ok(u32::try_from(val)?),
Ifd(val) => Ok(val),
IfdBig(val) => Ok(u32::try_from(val)?),
val => Err(TiffError::FormatError(
TiffFormatError::UnsignedIntegerExpected(val),
)),
@@ -80,6 +84,8 @@ impl Value {
Short(val) => Ok(val.into()),
Unsigned(val) => Ok(val.into()),
UnsignedBig(val) => Ok(val),
Ifd(val) => Ok(val.into()),
IfdBig(val) => Ok(val),
val => Err(TiffError::FormatError(
TiffFormatError::UnsignedIntegerExpected(val),
)),
@@ -138,6 +144,8 @@ impl Value {
RationalBig(numerator, denominator) => {
Ok(vec![u32::try_from(numerator)?, u32::try_from(denominator)?])
}
Ifd(val) => Ok(vec![val]),
IfdBig(val) => Ok(vec![u32::try_from(val)?]),
Ascii(val) => Ok(val.chars().map(u32::from).collect()),
val => Err(TiffError::FormatError(
TiffFormatError::UnsignedIntegerExpected(val),
@@ -254,6 +262,8 @@ impl Value {
UnsignedBig(val) => Ok(vec![val]),
Rational(numerator, denominator) => Ok(vec![numerator.into(), denominator.into()]),
RationalBig(numerator, denominator) => Ok(vec![numerator, denominator]),
Ifd(val) => Ok(vec![val.into()]),
IfdBig(val) => Ok(vec![val]),
Ascii(val) => Ok(val.chars().map(u32::from).map(u64::from).collect()),
val => Err(TiffError::FormatError(
TiffFormatError::UnsignedIntegerExpected(val),
@@ -342,8 +352,13 @@ impl Entry {
* match self.type_ {
Type::BYTE | Type::SBYTE | Type::ASCII | Type::UNDEFINED => 1,
Type::SHORT | Type::SSHORT => 2,
Type::LONG | Type::SLONG | Type::FLOAT => 4,
Type::LONG8 | Type::DOUBLE | Type::RATIONAL | Type::SRATIONAL => 8,
Type::LONG | Type::SLONG | Type::FLOAT | Type::IFD => 4,
Type::LONG8
| Type::SLONG8
| Type::DOUBLE
| Type::RATIONAL
| Type::SRATIONAL
| Type::IFD8 => 8,
Type::__NonExhaustive => unreachable!(),
};
@@ -353,6 +368,7 @@ impl Entry {
if decoder.bigtiff && value_bytes > 4 && value_bytes <= 8 {
return Ok(match self.type_ {
Type::LONG8 => UnsignedBig(self.r(bo).read_u64()?),
Type::SLONG8 => SignedBig(self.r(bo).read_i64()?),
Type::DOUBLE => Double(self.r(bo).read_f64()?),
Type::RATIONAL => {
let mut r = self.r(bo);
@@ -362,6 +378,7 @@ impl Entry {
let mut r = self.r(bo);
SRational(r.read_i32()?, r.read_i32()?)
}
Type::IFD8 => IfdBig(self.r(bo).read_u64()?),
Type::BYTE
| Type::SBYTE
| Type::ASCII
@@ -370,7 +387,8 @@ impl Entry {
| Type::SSHORT
| Type::LONG
| Type::SLONG
| Type::FLOAT => unreachable!(),
| Type::FLOAT
| Type::IFD => unreachable!(),
Type::__NonExhaustive => unreachable!(),
});
}
@@ -396,6 +414,10 @@ impl Entry {
decoder.goto_offset(self.r(bo).read_u32()?)?;
UnsignedBig(decoder.read_long8()?)
}
Type::SLONG8 => {
decoder.goto_offset(self.r(bo).read_u32()?)?;
SignedBig(decoder.read_slong8()?)
}
Type::DOUBLE => {
decoder.goto_offset(self.r(bo).read_u32()?)?;
Double(decoder.read_double()?)
@@ -408,6 +430,11 @@ impl Entry {
decoder.goto_offset(self.r(bo).read_u32()?)?;
SRational(decoder.read_slong()?, decoder.read_slong()?)
}
Type::IFD => Ifd(self.r(bo).read_u32()?),
Type::IFD8 => {
decoder.goto_offset(self.r(bo).read_u32()?)?;
IfdBig(decoder.read_long8()?)
}
Type::__NonExhaustive => unreachable!(),
});
}
@@ -472,7 +499,22 @@ impl Entry {
}
return Ok(List(v));
}
Type::LONG8 | Type::RATIONAL | Type::SRATIONAL | Type::DOUBLE => unreachable!(),
Type::IFD => {
let mut r = self.r(bo);
let mut v = Vec::new();
for _ in 0..self.count {
v.push(Ifd(r.read_u32()?));
}
return Ok(List(v));
}
Type::LONG8
| Type::SLONG8
| Type::RATIONAL
| Type::SRATIONAL
| Type::DOUBLE
| Type::IFD8 => {
unreachable!()
}
Type::__NonExhaustive => unreachable!(),
}
}
@@ -514,6 +556,15 @@ impl Entry {
Type::LONG8 => self.decode_offset(self.count, bo, limits, decoder, |decoder| {
Ok(UnsignedBig(decoder.read_long8()?))
}),
Type::SLONG8 => self.decode_offset(self.count, bo, limits, decoder, |decoder| {
Ok(SignedBig(decoder.read_slong8()?))
}),
Type::IFD => self.decode_offset(self.count, bo, limits, decoder, |decoder| {
Ok(Ifd(decoder.read_long()?))
}),
Type::IFD8 => self.decode_offset(self.count, bo, limits, decoder, |decoder| {
Ok(IfdBig(decoder.read_long8()?))
}),
Type::UNDEFINED => self.decode_offset(self.count, bo, limits, decoder, |decoder| {
Ok(Byte(u8::from(decoder.read_byte()?)))
}),