From 9aafb51e0be1720019db1c3d0a294ce9a42653df Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Thu, 2 Nov 2023 20:22:33 +0100
Subject: feat(engine): add texturing

---
 engine/src/texture.rs | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 engine/src/texture.rs

(limited to 'engine/src/texture.rs')

diff --git a/engine/src/texture.rs b/engine/src/texture.rs
new file mode 100644
index 0000000..7874df4
--- /dev/null
+++ b/engine/src/texture.rs
@@ -0,0 +1,100 @@
+use std::path::Path;
+
+use image::io::Reader as ImageReader;
+use image::{DynamicImage, ImageError};
+
+use crate::opengl::texture::Texture as InnerTexture;
+use crate::vector::Vec2;
+
+mod reexports
+{
+    pub use crate::opengl::texture::{Filtering, Wrapping};
+}
+
+pub use reexports::*;
+
+#[derive(Debug)]
+pub struct Texture
+{
+    inner: InnerTexture,
+}
+
+impl Texture
+{
+    /// Opens a texture image.
+    ///
+    /// # Errors
+    /// Will return `Err` if:
+    /// - Opening the image fails
+    /// - The image data is not 8-bit/color RGB
+    #[allow(clippy::new_without_default)]
+    pub fn open(path: &Path) -> Result<Self, Error>
+    {
+        let image = ImageReader::open(path)
+            .map_err(Error::OpenImageFailed)?
+            .decode()
+            .map_err(Error::DecodeImageFailed)?;
+
+        if !matches!(image, DynamicImage::ImageRgb8(_)) {
+            return Err(Error::UnsupportedImageDataKind);
+        }
+
+        let inner = InnerTexture::new();
+
+        inner.bind(|texture_curr_bound| {
+            InnerTexture::generate(
+                &texture_curr_bound,
+                &Vec2 { x: image.width(), y: image.height() },
+                image.as_bytes(),
+            );
+        });
+
+        let me = Self { inner };
+
+        me.set_wrap(Wrapping::Repeat);
+        me.set_magnifying_filter(Filtering::Linear);
+        me.set_minifying_filter(Filtering::Nearest);
+
+        Ok(me)
+    }
+
+    pub fn set_wrap(&self, wrapping: Wrapping)
+    {
+        self.inner.bind(|texture_curr_bound| {
+            InnerTexture::set_wrap(texture_curr_bound, wrapping);
+        });
+    }
+
+    pub fn set_magnifying_filter(&self, filtering: Filtering)
+    {
+        self.inner.bind(|texture_curr_bound| {
+            InnerTexture::set_magnifying_filter(texture_curr_bound, filtering);
+        });
+    }
+
+    pub fn set_minifying_filter(&self, filtering: Filtering)
+    {
+        self.inner.bind(|texture_curr_bound| {
+            InnerTexture::set_minifying_filter(texture_curr_bound, filtering);
+        });
+    }
+
+    pub(crate) fn inner(&self) -> &InnerTexture
+    {
+        &self.inner
+    }
+}
+
+/// Texture error.
+#[derive(Debug, thiserror::Error)]
+pub enum Error
+{
+    #[error("Failed to open texture image")]
+    OpenImageFailed(#[source] std::io::Error),
+
+    #[error("Failed to decode texture image")]
+    DecodeImageFailed(#[source] ImageError),
+
+    #[error("Unsupported image data kind")]
+    UnsupportedImageDataKind,
+}
-- 
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