fix: Remove dependency on Numpy and Pillow

Cargo.toml

@@ -9,7 +9,6 @@ name = "resvg_py"
 crate-type = ["cdylib"]
 
 [dependencies]
-numpy = "0.18.0"
 pyo3 = "0.18.1"
 resvg = "0.30.0"
 tiny-skia = "0.8.3"

README.md

@@ -19,17 +19,15 @@ Overall, `resvg-py` provides a simple and powerful way to work with SVG images i
 from pathlib import Path
 
 import resvg_py
-from PIL import Image
 
 options = resvg_py.SVGOptions()
 r = resvg_py.Resvg(options)
 
 with Path("resources/examples/svg/octocat.svg").open("r") as f:
     rendered = r.render(f.read(), 400, 400)
-    array = rendered.as_array()
-    im = Image.fromarray(array)
-    im.save("image.png")
 
+    with open("image.png", "wb") as f:
+        f.write(rendered.as_png())
 ```
 
 # Options

pyproject.toml

@@ -11,10 +11,7 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = [
-    "numpy",
-    "Pillow",
-]
+dependencies = []
 
 [project.optional-dependencies]
 dev = ["pytest", "pytest-snapshot"]

src/lib.rs

@@ -1,5 +1,3 @@
-use numpy::ndarray::Array3;
-use numpy::{IntoPyArray, PyArray3};
 use pyo3::prelude::*;
 use pyo3::types::PyBytes;
 use resvg::tiny_skia::Pixmap;
@@ -128,30 +126,6 @@ impl RenderedImage {
         self.pixmap.height()
     }
 
-    /// Returns the rendered image as a numpy array.
-    ///
-    /// The array has shape (height, width, 4) and contains RGBA data.
-    pub fn as_array<'py>(&self, py: Python<'py>) -> PyResult<&'py PyArray3<u8>> {
-        let pixels = self.pixmap.pixels();
-
-        Ok(Array3::from_shape_fn(
-            ((self.height()) as usize, (self.width()) as usize, 4),
-            |(y, x, c)| {
-                let index = y * self.width() as usize + x;
-                let pixel = &pixels[index];
-
-                match c {
-                    0 => pixel.red(),
-                    1 => pixel.green(),
-                    2 => pixel.blue(),
-                    3 => pixel.alpha(),
-                    _ => unreachable!(),
-                }
-            },
-        )
-        .into_pyarray(py))
-    }
-
     /// Returns the rendered image as bytes in PNG format.
     fn as_png(&self, py: Python) -> PyResult<PyObject> {
         self.pixmap