add a image-crate feature to allow using much less dependencies

Cargo.toml

@@ -15,7 +15,8 @@ license = "MIT OR Apache-2.0"
 audio = ["quad-snd"]
 log-rs = ["log"]
 glam-serde = ["glam/serde"]
-default = []
+default = ["image-crate"]
+image-crate = ["image"]
 
 [package.metadata.android]
 assets = "examples/"
@@ -30,7 +31,7 @@ all-features = true
 miniquad = { version = "=0.4.8", features = ["log-impl"] }
 quad-rand = "0.2.3"
 glam = { version = "0.27", features = ["scalar-math"] }
-image = { version = "0.24", default-features = false, features = ["png", "tga"] }
+image = { version = "0.24", default-features = false, features = ["png", "tga"], optional = true }
 macroquad_macro = { version = "0.1.8", path = "macroquad_macro" }
 fontdue = "0.9"
 backtrace = { version = "0.3.60", optional = true }

src/error.rs

@@ -6,6 +6,8 @@ pub enum Error {
         path: String,
     },
     ShaderError(miniquad::ShaderError),
+
+    #[cfg(feature = "image-crate")]
     ImageError(image::ImageError),
     UnknownError(&'static str),
 }
@@ -22,6 +24,7 @@ impl From<miniquad::ShaderError> for Error {
     }
 }
 
+#[cfg(feature = "image-crate")]
 impl From<image::ImageError> for Error {
     fn from(s: image::ImageError) -> Self {
         Error::ImageError(s)

src/prelude.rs

@@ -26,4 +26,5 @@ pub use crate::logging::*;
 
 pub use crate::{color_u8, DroppedFile};
 
+#[cfg(feature = "image-crate")]
 pub use image::ImageFormat;

src/texture.rs

@@ -1,9 +1,9 @@
 //! Loading and rendering textures. Also render textures, per-pixel image manipulations.
 
-use crate::{
-    color::Color, file::load_file, get_context, get_quad_context, math::Rect,
-    text::atlas::SpriteKey, Error,
-};
+use crate::{color::Color, get_context, get_quad_context, math::Rect, text::atlas::SpriteKey};
+
+#[cfg(feature = "image-crate")]
+use crate::{file::load_file, Error};
 
 pub use crate::quad_gl::FilterMode;
 use crate::quad_gl::{DrawMode, Vertex};
@@ -94,6 +94,7 @@ impl Image {
         }
     }
 
+    #[cfg(feature = "image-crate")]
     /// Creates an Image from a slice of bytes that contains an encoded image.
     ///
     /// If `format` is None, it will make an educated guess on the
@@ -303,6 +304,7 @@ impl Image {
         }
     }
 
+    #[cfg(feature = "image-crate")]
     /// Saves this image as a PNG file.
     /// This method is not supported on web and will panic.
     pub fn export_png(&self, path: &str) {
@@ -327,13 +329,15 @@ impl Image {
     }
 }
 
+#[cfg(feature = "image-crate")]
 /// Loads an [Image] from a file into CPU memory.
 pub async fn load_image(path: &str) -> Result<Image, Error> {
     let bytes = load_file(path).await?;
 
     Image::from_file_with_format(&bytes, None)
 }
 
+#[cfg(feature = "image-crate")]
 /// Loads a [Texture2D] from a file into GPU memory.
 pub async fn load_texture(path: &str) -> Result<Texture2D, Error> {
     let bytes = load_file(path).await?;
@@ -671,6 +675,7 @@ impl Texture2D {
         Texture2D::unmanaged(ctx.gl.white_texture)
     }
 
+    #[cfg(feature = "image-crate")]
     /// Creates a Texture2D from a slice of bytes that contains an encoded image.
     ///
     /// If `format` is None, it will make an educated guess on the