Update dependencies and restrict writers to implement Seek as well

Signed-off-by: trivernis <trivernis@protonmail.com>

Cargo.toml

@@ -4,21 +4,21 @@ readme = "README.md"
 license = "Apache-2.0"
 authors = ["trivernis <trivernis@protonmail.com>"]
 description = "An image thumbnail creation library"
-version = "0.2.5"
+version = "0.3.0"
 edition = "2018"
 repository = "https://github.com/Trivernis/thumbnailer"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-webp = "0.2.0"
+webp = "^0.2.1"
-mime = "0.3.16"
+mime = "^0.3.16"
-rayon = "1.5.1"
+rayon = "^1.5.1"
-ffmpeg-next = {version = "4.4.0", optional=true}
+ffmpeg-next = {version = "^4.4.0", optional=true}
-tempfile = "3.2.0"
+tempfile = "^3.3.0"
 
 [dependencies.image]
-version = "0.23.14"
+version = "^0.24.0"
 
 [features]
 default = ["ffmpeg"]

src/lib.rs

@@ -7,6 +7,7 @@
 //! use thumbnailer::{create_thumbnails, Thumbnail, ThumbnailSize};
 //! use std::fs::File;
 //! use std::io::BufReader;
+//! use std::io::Cursor;
 //!
 //! fn main() {
 //!     let file = File::open("tests/assets/test.png").unwrap();
@@ -14,7 +15,7 @@
 //!     let mut  thumbnails = create_thumbnails(reader, mime::IMAGE_PNG, [ThumbnailSize::Small, ThumbnailSize::Medium]).unwrap();
 //!     
 //!     let thumbnail = thumbnails.pop().unwrap();
-//!     let mut buf = Vec::new();
+//!     let mut buf = Cursor::new(Vec::new());
 //!     thumbnail.write_png(&mut buf).unwrap();
 //! }
 //! ```
@@ -41,7 +42,7 @@ pub struct Thumbnail {
 
 impl Thumbnail {
     /// Writes the bytes of the image in a png format
-    pub fn write_png<W: Write>(self, writer: &mut W) -> ThumbResult<()> {
+    pub fn write_png<W: Write + Seek>(self, writer: &mut W) -> ThumbResult<()> {
         let image = DynamicImage::ImageRgba8(self.inner.into_rgba8());
         image.write_to(writer, ImageOutputFormat::Png)?;
 
@@ -49,7 +50,7 @@ impl Thumbnail {
     }
 
     /// Writes the bytes of the image in a jpeg format
-    pub fn write_jpeg<W: Write>(self, writer: &mut W, compression: u8) -> ThumbResult<()> {
+    pub fn write_jpeg<W: Write + Seek>(self, writer: &mut W, compression: u8) -> ThumbResult<()> {
         let image = DynamicImage::ImageRgb8(self.inner.into_rgb8());
         image.write_to(writer, ImageOutputFormat::Jpeg(compression))?;
 

tests/image_writing.rs

@@ -71,11 +71,11 @@ fn write_thumbnail(
     .pop()
     .unwrap();
 
-    let mut buf = Vec::new();
+    let mut buf = Cursor::new(Vec::new());
     match target_format {
         TargetFormat::Png => thumb.write_png(&mut buf)?,
         TargetFormat::Jpeg => thumb.write_jpeg(&mut buf, 8)?,
     }
 
-    Ok(buf)
+    Ok(buf.into_inner())
 }