Remove `image` abstractions in `iced_graphics`

4 files changed, 111 insertions, 276 deletions

diff --git a/graphics/src/image.rs b/graphics/src/image.rs
index 04f4ff9d..2f634252 100644
--- a/graphics/src/image.rs
+++ b/graphics/src/image.rs
@@ -1,10 +1,94 @@
-//! Render images.
-#[cfg(feature = "image_rs")]
-pub mod raster;
+//! Load and operate on images.
+use crate::core::image::{Data, Handle};
 
-#[cfg(feature = "svg")]
-pub mod vector;
+use bitflags::bitflags;
 
-pub mod storage;
+pub use ::image as image_rs;
 
-pub use storage::Storage;
+pub fn load(handle: &Handle) -> image_rs::ImageResult<image_rs::DynamicImage> {
+    match handle.data() {
+        Data::Path(path) => {
+            let image = ::image::open(path)?;
+
+            let operation = std::fs::File::open(path)
+                .ok()
+                .map(std::io::BufReader::new)
+                .and_then(|mut reader| Operation::from_exif(&mut reader).ok())
+                .unwrap_or_else(Operation::empty);
+
+            Ok(operation.perform(image))
+        }
+        Data::Bytes(bytes) => {
+            let image = ::image::load_from_memory(bytes)?;
+            let operation =
+                Operation::from_exif(&mut std::io::Cursor::new(bytes))
+                    .ok()
+                    .unwrap_or_else(Operation::empty);
+
+            Ok(operation.perform(image))
+        }
+        Data::Rgba {
+            width,
+            height,
+            pixels,
+        } => {
+            if let Some(image) = image_rs::ImageBuffer::from_vec(
+                *width,
+                *height,
+                pixels.to_vec(),
+            ) {
+                Ok(image_rs::DynamicImage::ImageRgba8(image))
+            } else {
+                Err(image_rs::error::ImageError::Limits(
+                    image_rs::error::LimitError::from_kind(
+                        image_rs::error::LimitErrorKind::DimensionError,
+                    ),
+                ))
+            }
+        }
+    }
+}
+
+bitflags! {
+    struct Operation: u8 {
+        const FLIP_HORIZONTALLY = 0b001;
+        const ROTATE_180 = 0b010;
+        const FLIP_DIAGONALLY = 0b100;
+    }
+}
+
+impl Operation {
+    // Meaning of the returned value is described e.g. at:
+    // https://magnushoff.com/articles/jpeg-orientation/
+    fn from_exif<R>(reader: &mut R) -> Result<Self, exif::Error>
+    where
+        R: std::io::BufRead + std::io::Seek,
+    {
+        let exif = exif::Reader::new().read_from_container(reader)?;
+
+        Ok(exif
+            .get_field(exif::Tag::Orientation, exif::In::PRIMARY)
+            .and_then(|field| field.value.get_uint(0))
+            .and_then(|value| u8::try_from(value).ok())
+            .and_then(|value| Self::from_bits(value.saturating_sub(1)))
+            .unwrap_or_else(Self::empty))
+    }
+
+    fn perform(self, mut image: image::DynamicImage) -> image::DynamicImage {
+        use image::imageops;
+
+        if self.contains(Self::FLIP_DIAGONALLY) {
+            imageops::flip_vertical_in_place(&mut image)
+        }
+
+        if self.contains(Self::ROTATE_180) {
+            imageops::rotate180_in_place(&mut image);
+        }
+
+        if self.contains(Self::FLIP_HORIZONTALLY) {
+            imageops::flip_horizontal_in_place(&mut image);
+        }
+
+        image
+    }
+}
diff --git a/graphics/src/image/raster.rs b/graphics/src/image/raster.rs
deleted file mode 100644
index 03211160..00000000
--- a/graphics/src/image/raster.rs
+++ /dev/null
@@ -1,242 +0,0 @@
-//! Raster image loading and caching.
-use crate::image::Storage;
-
-use iced_core::image;
-use iced_core::Size;
-
-use bitflags::bitflags;
-use std::collections::{HashMap, HashSet};
-
-/// Entry in cache corresponding to an image handle
-#[derive(Debug)]
-pub enum Memory<T: Storage> {
-    /// Image data on host
-    Host(::image_rs::ImageBuffer<::image_rs::Rgba<u8>, Vec<u8>>),
-    /// Storage entry
-    Device(T::Entry),
-    /// Image not found
-    NotFound,
-    /// Invalid image data
-    Invalid,
-}
-
-impl<T: Storage> Memory<T> {
-    /// Width and height of image
-    pub fn dimensions(&self) -> Size<u32> {
-        use crate::image::storage::Entry;
-
-        match self {
-            Memory::Host(image) => {
-                let (width, height) = image.dimensions();
-
-                Size::new(width, height)
-            }
-            Memory::Device(entry) => entry.size(),
-            Memory::NotFound => Size::new(1, 1),
-            Memory::Invalid => Size::new(1, 1),
-        }
-    }
-}
-
-/// Caches image raster data
-#[derive(Debug)]
-pub struct Cache<T: Storage> {
-    map: HashMap<u64, Memory<T>>,
-    hits: HashSet<u64>,
-}
-
-impl<T: Storage> Cache<T> {
-    /// Load image
-    pub fn load(&mut self, handle: &image::Handle) -> &mut Memory<T> {
-        if self.contains(handle) {
-            return self.get(handle).unwrap();
-        }
-
-        let memory = match handle.data() {
-            image::Data::Path(path) => {
-                if let Ok(image) = image_rs::open(path) {
-                    let operation = std::fs::File::open(path)
-                        .ok()
-                        .map(std::io::BufReader::new)
-                        .and_then(|mut reader| {
-                            Operation::from_exif(&mut reader).ok()
-                        })
-                        .unwrap_or_else(Operation::empty);
-
-                    Memory::Host(operation.perform(image.to_rgba8()))
-                } else {
-                    Memory::NotFound
-                }
-            }
-            image::Data::Bytes(bytes) => {
-                if let Ok(image) = image_rs::load_from_memory(bytes) {
-                    let operation =
-                        Operation::from_exif(&mut std::io::Cursor::new(bytes))
-                            .ok()
-                            .unwrap_or_else(Operation::empty);
-
-                    Memory::Host(operation.perform(image.to_rgba8()))
-                } else {
-                    Memory::Invalid
-                }
-            }
-            image::Data::Rgba {
-                width,
-                height,
-                pixels,
-            } => {
-                if let Some(image) = image_rs::ImageBuffer::from_vec(
-                    *width,
-                    *height,
-                    pixels.to_vec(),
-                ) {
-                    Memory::Host(image)
-                } else {
-                    Memory::Invalid
-                }
-            }
-        };
-
-        self.insert(handle, memory);
-        self.get(handle).unwrap()
-    }
-
-    /// Load image and upload raster data
-    pub fn upload(
-        &mut self,
-        handle: &image::Handle,
-        state: &mut T::State<'_>,
-        storage: &mut T,
-    ) -> Option<&T::Entry> {
-        let memory = self.load(handle);
-
-        if let Memory::Host(image) = memory {
-            let (width, height) = image.dimensions();
-
-            let entry = storage.upload(width, height, image, state)?;
-
-            *memory = Memory::Device(entry);
-        }
-
-        if let Memory::Device(allocation) = memory {
-            Some(allocation)
-        } else {
-            None
-        }
-    }
-
-    /// Trim cache misses from cache
-    pub fn trim(&mut self, storage: &mut T, state: &mut T::State<'_>) {
-        let hits = &self.hits;
-
-        self.map.retain(|k, memory| {
-            let retain = hits.contains(k);
-
-            if !retain {
-                if let Memory::Device(entry) = memory {
-                    storage.remove(entry, state);
-                }
-            }
-
-            retain
-        });
-
-        self.hits.clear();
-    }
-
-    fn get(&mut self, handle: &image::Handle) -> Option<&mut Memory<T>> {
-        let _ = self.hits.insert(handle.id());
-
-        self.map.get_mut(&handle.id())
-    }
-
-    fn insert(&mut self, handle: &image::Handle, memory: Memory<T>) {
-        let _ = self.map.insert(handle.id(), memory);
-    }
-
-    fn contains(&self, handle: &image::Handle) -> bool {
-        self.map.contains_key(&handle.id())
-    }
-}
-
-impl<T: Storage> Default for Cache<T> {
-    fn default() -> Self {
-        Self {
-            map: HashMap::new(),
-            hits: HashSet::new(),
-        }
-    }
-}
-
-bitflags! {
-    struct Operation: u8 {
-        const FLIP_HORIZONTALLY = 0b001;
-        const ROTATE_180 = 0b010;
-        const FLIP_DIAGONALLY = 0b100;
-    }
-}
-
-impl Operation {
-    // Meaning of the returned value is described e.g. at:
-    // https://magnushoff.com/articles/jpeg-orientation/
-    fn from_exif<R>(reader: &mut R) -> Result<Self, exif::Error>
-    where
-        R: std::io::BufRead + std::io::Seek,
-    {
-        let exif = exif::Reader::new().read_from_container(reader)?;
-
-        Ok(exif
-            .get_field(exif::Tag::Orientation, exif::In::PRIMARY)
-            .and_then(|field| field.value.get_uint(0))
-            .and_then(|value| u8::try_from(value).ok())
-            .and_then(|value| Self::from_bits(value.saturating_sub(1)))
-            .unwrap_or_else(Self::empty))
-    }
-
-    fn perform<P>(
-        self,
-        image: image_rs::ImageBuffer<P, Vec<P::Subpixel>>,
-    ) -> image_rs::ImageBuffer<P, Vec<P::Subpixel>>
-    where
-        P: image_rs::Pixel + 'static,
-    {
-        use image_rs::imageops;
-
-        let mut image = if self.contains(Self::FLIP_DIAGONALLY) {
-            flip_diagonally(image)
-        } else {
-            image
-        };
-
-        if self.contains(Self::ROTATE_180) {
-            imageops::rotate180_in_place(&mut image);
-        }
-
-        if self.contains(Self::FLIP_HORIZONTALLY) {
-            imageops::flip_horizontal_in_place(&mut image);
-        }
-
-        image
-    }
-}
-
-fn flip_diagonally<I>(
-    image: I,
-) -> image_rs::ImageBuffer<I::Pixel, Vec<<I::Pixel as image_rs::Pixel>::Subpixel>>
-where
-    I: image_rs::GenericImage,
-    I::Pixel: 'static,
-{
-    let (width, height) = image.dimensions();
-    let mut out = image_rs::ImageBuffer::new(height, width);
-
-    for x in 0..width {
-        for y in 0..height {
-            let p = image.get_pixel(x, y);
-
-            out.put_pixel(y, x, p);
-        }
-    }
-
-    out
-}
diff --git a/graphics/src/lib.rs b/graphics/src/lib.rs
index c6f9cf57..0c50db52 100644
--- a/graphics/src/lib.rs
+++ b/graphics/src/lib.rs
@@ -28,13 +28,15 @@ mod viewport;
 
 pub mod backend;
 pub mod compositor;
-pub mod image;
 pub mod primitive;
 pub mod renderer;
 
 #[cfg(feature = "geometry")]
 pub mod geometry;
 
+#[cfg(feature = "image")]
+pub mod image;
+
 pub use antialiasing::Antialiasing;
 pub use backend::Backend;
 pub use compositor::Compositor;
diff --git a/graphics/src/image/vector.rs b/wgpu/src/image/vector.rs
index 32729acd..3624e46b 100644
--- a/graphics/src/image/vector.rs
+++ b/wgpu/src/image/vector.rs
@@ -1,8 +1,6 @@
-//! Vector image loading and caching
-use crate::image::Storage;
-
-use iced_core::svg;
-use iced_core::{Color, Size};
+use crate::core::svg;
+use crate::core::{Color, Size};
+use crate::image::atlas::{self, Atlas};
 
 use resvg::tiny_skia;
 use resvg::usvg;
@@ -32,17 +30,17 @@ impl Svg {
 }
 
 /// Caches svg vector and raster data
-#[derive(Debug)]
-pub struct Cache<T: Storage> {
+#[derive(Debug, Default)]
+pub struct Cache {
     svgs: HashMap<u64, Svg>,
-    rasterized: HashMap<(u64, u32, u32, ColorFilter), T::Entry>,
+    rasterized: HashMap<(u64, u32, u32, ColorFilter), atlas::Entry>,
     svg_hits: HashSet<u64>,
     rasterized_hits: HashSet<(u64, u32, u32, ColorFilter)>,
 }
 
 type ColorFilter = Option<[u8; 4]>;
 
-impl<T: Storage> Cache<T> {
+impl Cache {
     /// Load svg
     pub fn load(&mut self, handle: &svg::Handle) -> &Svg {
         if self.svgs.contains_key(&handle.id()) {
@@ -73,13 +71,15 @@ impl<T: Storage> Cache<T> {
     /// Load svg and upload raster data
     pub fn upload(
         &mut self,
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        encoder: &mut wgpu::CommandEncoder,
         handle: &svg::Handle,
         color: Option<Color>,
         [width, height]: [f32; 2],
         scale: f32,
-        state: &mut T::State<'_>,
-        storage: &mut T,
-    ) -> Option<&T::Entry> {
+        atlas: &mut Atlas,
+    ) -> Option<&atlas::Entry> {
         let id = handle.id();
 
         let (width, height) = (
@@ -136,7 +136,9 @@ impl<T: Storage> Cache<T> {
                     });
                 }
 
-                let allocation = storage.upload(width, height, &rgba, state)?;
+                let allocation = atlas
+                    .upload(device, queue, encoder, width, height, &rgba)?;
+
                 log::debug!("allocating {} {}x{}", id, width, height);
 
                 let _ = self.svg_hits.insert(id);
@@ -150,7 +152,7 @@ impl<T: Storage> Cache<T> {
     }
 
     /// Load svg and upload raster data
-    pub fn trim(&mut self, storage: &mut T, state: &mut T::State<'_>) {
+    pub fn trim(&mut self, atlas: &mut Atlas) {
         let svg_hits = &self.svg_hits;
         let rasterized_hits = &self.rasterized_hits;
 
@@ -159,7 +161,7 @@ impl<T: Storage> Cache<T> {
             let retain = rasterized_hits.contains(k);
 
             if !retain {
-                storage.remove(entry, state);
+                atlas.remove(entry);
             }
 
             retain
@@ -169,17 +171,6 @@ impl<T: Storage> Cache<T> {
     }
 }
 
-impl<T: Storage> Default for Cache<T> {
-    fn default() -> Self {
-        Self {
-            svgs: HashMap::new(),
-            rasterized: HashMap::new(),
-            svg_hits: HashSet::new(),
-            rasterized_hits: HashSet::new(),
-        }
-    }
-}
-
 impl std::fmt::Debug for Svg {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {