wim/image-tiff
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Format code using 'cargo fmt'

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This commit is contained in:
Atul Bhosale committed 2019-04-18 00:04:43 +05:30
1 parent fc743cfd27
commit 522fbd1a69
10 files changed
+488 -292
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src/encoder/mod.rs
+51 -32
View File
@@ -1,15 +1,15 @@
use std::io::{Write, Seek};
use byteorder::NativeEndian;
use std::collections::BTreeMap;
use byteorder::{NativeEndian};
use std::io::{Seek, Write};
use crate::decoder::ifd::{self, Tag};
use crate::error::{TiffResult, TiffFormatError, TiffError};
use crate::error::{TiffError, TiffFormatError, TiffResult};
mod writer;
pub mod colortype;
mod writer;
use self::writer::*;
use self::colortype::*;
use self::writer::*;
/// Type to represent tiff values of type `RATIONAL`
#[derive(Clone)]
@@ -60,9 +60,8 @@ impl TiffValue for [u16] {
fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
// We write using nativeedian so this sould be safe
let slice = unsafe {
std::slice::from_raw_parts(self.as_ptr() as *const u8, self.len()*2)
};
let slice =
unsafe { std::slice::from_raw_parts(self.as_ptr() as *const u8, self.len() * 2) };
writer.write_bytes(slice)?;
Ok(())
}
@@ -78,9 +77,8 @@ impl TiffValue for [u32] {
fn write<W: Write>(&self, writer: &mut TiffWriter<W>) -> TiffResult<()> {
// We write using nativeedian so this sould be safe
let slice = unsafe {
std::slice::from_raw_parts(self.as_ptr() as *const u8, self.len()*4)
};
let slice =
unsafe { std::slice::from_raw_parts(self.as_ptr() as *const u8, self.len() * 4) };
writer.write_bytes(slice)?;
Ok(())
}
@@ -172,8 +170,7 @@ impl TiffValue for str {
writer.write_bytes(self.as_bytes())?;
writer.write_u8(0)?;
Ok(())
}
else {
} else {
Err(TiffError::FormatError(TiffFormatError::InvalidTag))
}
}
@@ -219,7 +216,7 @@ impl<W: Write + Seek> TiffEncoder<W> {
let mut encoder = TiffEncoder {
writer: TiffWriter::new(writer),
};
NativeEndian::write_header(&mut encoder.writer)?;
Ok(encoder)
@@ -231,20 +228,32 @@ impl<W: Write + Seek> TiffEncoder<W> {
}
/// Create an 'ImageEncoder' to encode an image one slice at a time.
pub fn new_image<C: ColorType>(&mut self, width: u32, height: u32) -> TiffResult<ImageEncoder<W, C>> {
pub fn new_image<C: ColorType>(
&mut self,
width: u32,
height: u32,
) -> TiffResult<ImageEncoder<W, C>> {
let encoder = DirectoryEncoder::new(&mut self.writer)?;
ImageEncoder::new(encoder, width, height)
}
/// Convenience function to write an entire image from memory.
pub fn write_image<C: ColorType>(&mut self, width: u32, height: u32, data: &[C::Inner]) -> TiffResult<()> where [C::Inner]: TiffValue {
pub fn write_image<C: ColorType>(
&mut self,
width: u32,
height: u32,
data: &[C::Inner],
) -> TiffResult<()>
where
[C::Inner]: TiffValue,
{
let encoder = DirectoryEncoder::new(&mut self.writer)?;
let mut image: ImageEncoder<W, C> = ImageEncoder::new(encoder, width, height).unwrap();
let mut idx = 0;
while image.next_strip_sample_count() > 0 {
let sample_count = image.next_strip_sample_count() as usize;
image.write_strip(&data[idx..idx+sample_count]).unwrap();
image.write_strip(&data[idx..idx + sample_count]).unwrap();
idx += sample_count;
}
image.finish()
@@ -285,7 +294,8 @@ impl<'a, W: Write + Seek> DirectoryEncoder<'a, W> {
value.write(&mut writer).unwrap();
}
self.ifd.insert(tag.to_u16(), (<T>::FIELD_TYPE as u16, value.count(), bytes));
self.ifd
.insert(tag.to_u16(), (<T>::FIELD_TYPE as u16, value.count(), bytes));
}
fn write_directory(&mut self) -> TiffResult<u64> {
@@ -297,15 +307,14 @@ impl<'a, W: Write + Seek> DirectoryEncoder<'a, W> {
*bytes = vec![0, 0, 0, 0];
let mut writer = TiffWriter::new(bytes as &mut [u8]);
writer.write_u32(offset as u32)?;
}
else {
} else {
while bytes.len() < 4 {
bytes.push(0);
}
}
}
let offset = self.writer.offset();
let offset = self.writer.offset();
self.writer.write_u16(self.ifd.len() as u16)?;
for (tag, (field_type, count, offset)) in self.ifd.iter() {
@@ -355,7 +364,6 @@ impl<'a, W: Write + Seek> Drop for DirectoryEncoder<'a, W> {
}
}
/// Type to encode images strip by strip.
///
/// You should call `finish` on this when you are finished with it.
@@ -393,7 +401,11 @@ pub struct ImageEncoder<'a, W: Write + Seek, C: ColorType> {
}
impl<'a, W: Write + Seek, T: ColorType> ImageEncoder<'a, W, T> {
fn new(mut encoder: DirectoryEncoder<'a, W>, width: u32, height: u32) -> TiffResult<ImageEncoder<'a, W, T>> {
fn new(
mut encoder: DirectoryEncoder<'a, W>,
width: u32,
height: u32,
) -> TiffResult<ImageEncoder<'a, W, T>> {
let row_samples = u64::from(width) * <T>::BITS_PER_SAMPLE.len() as u64;
let row_bytes = row_samples * u64::from(<T::Inner>::BYTE_LEN);
@@ -412,10 +424,10 @@ impl<'a, W: Write + Seek, T: ColorType> ImageEncoder<'a, W, T> {
encoder.write_tag(Tag::RowsPerStrip, rows_per_strip as u32);
encoder.write_tag(Tag::SamplesPerPixel, <T>::BITS_PER_SAMPLE.len() as u16);
encoder.write_tag(Tag::XResolution, Rational {n: 1, d: 1});
encoder.write_tag(Tag::YResolution, Rational {n: 1, d: 1});
encoder.write_tag(Tag::XResolution, Rational { n: 1, d: 1 });
encoder.write_tag(Tag::YResolution, Rational { n: 1, d: 1 });
encoder.write_tag(Tag::ResolutionUnit, 1u16);
Ok(ImageEncoder {
encoder,
strip_count,
@@ -433,17 +445,23 @@ impl<'a, W: Write + Seek, T: ColorType> ImageEncoder<'a, W, T> {
/// Number of samples the next strip should have.
pub fn next_strip_sample_count(&self) -> u64 {
if self.strip_idx >= self.strip_count {
return 0
return 0;
}
let start_row = std::cmp::min(u64::from(self.height), self.strip_idx * self.rows_per_strip);
let end_row = std::cmp::min(u64::from(self.height), (self.strip_idx+1)*self.rows_per_strip);
let end_row = std::cmp::min(
u64::from(self.height),
(self.strip_idx + 1) * self.rows_per_strip,
);
(end_row - start_row) * self.row_samples
}
/// Write a single strip.
pub fn write_strip(&mut self, value: &[T::Inner]) -> TiffResult<()> where [T::Inner]: TiffValue {
pub fn write_strip(&mut self, value: &[T::Inner]) -> TiffResult<()>
where
[T::Inner]: TiffValue,
{
// TODO: Compression
let samples = self.next_strip_sample_count();
assert_eq!(value.len() as u64, samples);
@@ -479,8 +497,10 @@ impl<'a, W: Write + Seek, T: ColorType> ImageEncoder<'a, W, T> {
}
fn finish_internal(&mut self) -> TiffResult<()> {
self.encoder.write_tag(Tag::StripOffsets, &*self.strip_offsets);
self.encoder.write_tag(Tag::StripByteCounts, &*self.strip_byte_count);
self.encoder
.write_tag(Tag::StripOffsets, &*self.strip_offsets);
self.encoder
.write_tag(Tag::StripByteCounts, &*self.strip_byte_count);
self.dropped = true;
self.encoder.finish_internal()
@@ -504,4 +524,3 @@ impl<'a, W: Write + Seek, C: ColorType> Drop for ImageEncoder<'a, W, C> {
}
}
}