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Factor tags into own module

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Tag representations are not decoder- or encoder-specific, so should live
in their own module accessible to both for reuse. The decoder::ifd
module remains since this module is mainly dedicated to decoding the
IFD.
This commit is contained in:
Andrew Champion committed 2019-12-21 15:57:24 +00:00
1 parent f9cace84da
commit f92be13f6c
9 files changed
+242 -238
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src/encoder/colortype.rs
+1 -1
View File
@@ -1,4 +1,4 @@
use decoder::PhotometricInterpretation;
use tags::PhotometricInterpretation;
/// Trait for different colortypes that can be encoded.
pub trait ColorType {
src/encoder/mod.rs
+22 -29
View File
@@ -3,7 +3,7 @@ use std::collections::BTreeMap;
use std::io::{Seek, Write};
use std::mem;
use decoder::ifd::{self, Tag, U16Tag};
use tags::{self, ResolutionUnit, Tag, Type, U16Tag};
use error::{TiffError, TiffFormatError, TiffResult};
pub mod colortype;
@@ -25,17 +25,10 @@ pub struct SRational {
pub d: i32,
}
/// Type to represent resolution units
pub enum ResolutionUnit {
None = 1,
Inch = 2,
Centimeter = 3,
}
/// Trait for types that can be encoded in a tiff file
pub trait TiffValue {
const BYTE_LEN: u32;
const FIELD_TYPE: ifd::Type;
const FIELD_TYPE: Type;
fn count(&self) -> u32;
fn bytes(&self) -> u32 {
self.count() * Self::BYTE_LEN
@@ -45,7 +38,7 @@ pub trait TiffValue {
impl TiffValue for [u8] {
const BYTE_LEN: u32 = 1;
const FIELD_TYPE: ifd::Type = ifd::Type::BYTE;
const FIELD_TYPE: Type = Type::BYTE;
fn count(&self) -> u32 {
self.len() as u32
@@ -59,7 +52,7 @@ impl TiffValue for [u8] {
impl TiffValue for [i8] {
const BYTE_LEN: u32 = 1;
const FIELD_TYPE: ifd::Type = ifd::Type::SBYTE;
const FIELD_TYPE: Type = Type::SBYTE;
fn count(&self) -> u32 {
self.len() as u32
@@ -76,7 +69,7 @@ impl TiffValue for [i8] {
impl TiffValue for [u16] {
const BYTE_LEN: u32 = 2;
const FIELD_TYPE: ifd::Type = ifd::Type::SHORT;
const FIELD_TYPE: Type = Type::SHORT;
fn count(&self) -> u32 {
self.len() as u32
@@ -93,7 +86,7 @@ impl TiffValue for [u16] {
impl TiffValue for [i16] {
const BYTE_LEN: u32 = 2;
const FIELD_TYPE: ifd::Type = ifd::Type::SSHORT;
const FIELD_TYPE: Type = Type::SSHORT;
fn count(&self) -> u32 {
self.len() as u32
@@ -110,7 +103,7 @@ impl TiffValue for [i16] {
impl TiffValue for [u32] {
const BYTE_LEN: u32 = 4;
const FIELD_TYPE: ifd::Type = ifd::Type::LONG;
const FIELD_TYPE: Type = Type::LONG;
fn count(&self) -> u32 {
self.len() as u32
@@ -127,7 +120,7 @@ impl TiffValue for [u32] {
impl TiffValue for [i32] {
const BYTE_LEN: u32 = 4;
const FIELD_TYPE: ifd::Type = ifd::Type::SLONG;
const FIELD_TYPE: Type = Type::SLONG;
fn count(&self) -> u32 {
self.len() as u32
@@ -144,7 +137,7 @@ impl TiffValue for [i32] {
impl TiffValue for [u64] {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::LONG8;
const FIELD_TYPE: Type = Type::LONG8;
fn count(&self) -> u32 {
self.len() as u32
@@ -161,7 +154,7 @@ impl TiffValue for [u64] {
impl TiffValue for [Rational] {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::RATIONAL;
const FIELD_TYPE: Type = Type::RATIONAL;
fn count(&self) -> u32 {
self.len() as u32
@@ -177,7 +170,7 @@ impl TiffValue for [Rational] {
impl TiffValue for [SRational] {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::SRATIONAL;
const FIELD_TYPE: Type = Type::SRATIONAL;
fn count(&self) -> u32 {
self.len() as u32
@@ -193,7 +186,7 @@ impl TiffValue for [SRational] {
impl TiffValue for u8 {
const BYTE_LEN: u32 = 1;
const FIELD_TYPE: ifd::Type = ifd::Type::BYTE;
const FIELD_TYPE: Type = Type::BYTE;
fn count(&self) -> u32 {
1
@@ -207,7 +200,7 @@ impl TiffValue for u8 {
impl TiffValue for i8 {
const BYTE_LEN: u32 = 1;
const FIELD_TYPE: ifd::Type = ifd::Type::SBYTE;
const FIELD_TYPE: Type = Type::SBYTE;
fn count(&self) -> u32 {
1
@@ -221,7 +214,7 @@ impl TiffValue for i8 {
impl TiffValue for u16 {
const BYTE_LEN: u32 = 2;
const FIELD_TYPE: ifd::Type = ifd::Type::SHORT;
const FIELD_TYPE: Type = Type::SHORT;
fn count(&self) -> u32 {
1
@@ -235,7 +228,7 @@ impl TiffValue for u16 {
impl TiffValue for i16 {
const BYTE_LEN: u32 = 2;
const FIELD_TYPE: ifd::Type = ifd::Type::SSHORT;
const FIELD_TYPE: Type = Type::SSHORT;
fn count(&self) -> u32 {
1
@@ -249,7 +242,7 @@ impl TiffValue for i16 {
impl TiffValue for u32 {
const BYTE_LEN: u32 = 4;
const FIELD_TYPE: ifd::Type = ifd::Type::LONG;
const FIELD_TYPE: Type = Type::LONG;
fn count(&self) -> u32 {
1
@@ -263,7 +256,7 @@ impl TiffValue for u32 {
impl TiffValue for i32 {
const BYTE_LEN: u32 = 4;
const FIELD_TYPE: ifd::Type = ifd::Type::SLONG;
const FIELD_TYPE: Type = Type::SLONG;
fn count(&self) -> u32 {
1
@@ -277,7 +270,7 @@ impl TiffValue for i32 {
impl TiffValue for u64 {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::LONG8;
const FIELD_TYPE: Type = Type::LONG8;
fn count(&self) -> u32 {
1
@@ -291,7 +284,7 @@ impl TiffValue for u64 {
impl TiffValue for Rational {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::RATIONAL;
const FIELD_TYPE: Type = Type::RATIONAL;
fn count(&self) -> u32 {
1
@@ -306,7 +299,7 @@ impl TiffValue for Rational {
impl TiffValue for SRational {
const BYTE_LEN: u32 = 8;
const FIELD_TYPE: ifd::Type = ifd::Type::SRATIONAL;
const FIELD_TYPE: Type = Type::SRATIONAL;
fn count(&self) -> u32 {
1
@@ -321,7 +314,7 @@ impl TiffValue for SRational {
impl TiffValue for str {
const BYTE_LEN: u32 = 1;
const FIELD_TYPE: ifd::Type = ifd::Type::ASCII;
const FIELD_TYPE: Type = Type::ASCII;
fn count(&self) -> u32 {
self.len() as u32 + 1
@@ -340,7 +333,7 @@ impl TiffValue for str {
impl<'a, T: TiffValue + ?Sized> TiffValue for &'a T {
const BYTE_LEN: u32 = T::BYTE_LEN;
const FIELD_TYPE: ifd::Type = T::FIELD_TYPE;
const FIELD_TYPE: Type = T::FIELD_TYPE;
fn count(&self) -> u32 {
(*self).count()