Move image/svg handling into iced_graphics

The `TextureStore` trait is implemented by the atlas, and can also be
implemented in the glow renderer or in a software renderer.

The API here may be improved in the future, but API stability is
presumably not a huge issue since these types will only be used by
renderer backends.

graphics/Cargo.toml

@@ -11,17 +11,33 @@ keywords = ["gui", "ui", "graphics", "interface", "widgets"]
 categories = ["gui"]
 
 [features]
+svg = ["resvg", "usvg", "tiny-skia"]
+image = ["png", "jpeg", "jpeg_rayon", "gif", "webp", "bmp"]
+png = ["image_rs/png"]
+jpeg = ["image_rs/jpeg"]
+jpeg_rayon = ["image_rs/jpeg_rayon"]
+gif = ["image_rs/gif"]
+webp = ["image_rs/webp"]
+pnm = ["image_rs/pnm"]
+ico = ["image_rs/ico"]
+bmp = ["image_rs/bmp"]
+hdr = ["image_rs/hdr"]
+dds = ["image_rs/dds"]
+farbfeld = ["image_rs/farbfeld"]
 canvas = ["lyon"]
 qr_code = ["qrcode", "canvas"]
 font-source = ["font-kit"]
 font-fallback = []
 font-icons = []
 opengl = []
+image_rs = ["kamadak-exif"]
 
 [dependencies]
 glam = "0.21.3"
+log = "0.4"
 raw-window-handle = "0.5"
 thiserror = "1.0"
+bitflags = "1.2"
 
 [dependencies.bytemuck]
 version = "1.4"
@@ -48,6 +64,28 @@ default-features = false
 version = "0.10"
 optional = true
 
+[dependencies.image_rs]
+version = "0.23"
+package = "image"
+default-features = false
+optional = true
+
+[dependencies.resvg]
+version = "0.18"
+optional = true
+
+[dependencies.usvg]
+version = "0.18"
+optional = true
+
+[dependencies.tiny-skia]
+version = "0.6"
+optional = true
+
+[dependencies.kamadak-exif]
+version = "0.5"
+optional = true
+
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]
 all-features = true