feat(engine): add support for textures with 8-bit rgba data

2 files changed, 36 insertions, 7 deletions

diff --git a/engine/src/opengl/texture.rs b/engine/src/opengl/texture.rs
index c7bf75b..68ac050 100644
--- a/engine/src/opengl/texture.rs
+++ b/engine/src/opengl/texture.rs
@@ -32,18 +32,23 @@ impl Texture
         cb(currently_bound);
     }
 
-    pub fn generate(_: &CurrentlyBound<Self>, dimens: &Vec2<u32>, data: &[u8])
+    pub fn generate(
+        _: &CurrentlyBound<Self>,
+        dimens: &Vec2<u32>,
+        data: &[u8],
+        pixel_data_format: PixelDataFormat,
+    )
     {
         #[allow(clippy::cast_possible_wrap)]
         unsafe {
             gl::TexImage2D(
                 gl::TEXTURE_2D,
                 0,
-                gl::RGB as i32,
+                pixel_data_format.to_gl() as i32,
                 dimens.x as i32,
                 dimens.y as i32,
                 0,
-                gl::RGB,
+                pixel_data_format.to_gl(),
                 gl::UNSIGNED_BYTE,
                 data.as_ptr().cast(),
             );
@@ -142,3 +147,22 @@ impl Filtering
         }
     }
 }
+
+/// Texture pixel data format.
+#[derive(Debug, Clone, Copy)]
+pub enum PixelDataFormat
+{
+    Rgb,
+    Rgba,
+}
+
+impl PixelDataFormat
+{
+    fn to_gl(self) -> gl::types::GLenum
+    {
+        match self {
+            Self::Rgb => gl::RGB,
+            Self::Rgba => gl::RGBA,
+        }
+    }
+}
diff --git a/engine/src/texture.rs b/engine/src/texture.rs
index 7874df4..bde3cd2 100644
--- a/engine/src/texture.rs
+++ b/engine/src/texture.rs
@@ -3,7 +3,7 @@ use std::path::Path;
 use image::io::Reader as ImageReader;
 use image::{DynamicImage, ImageError};
 
-use crate::opengl::texture::Texture as InnerTexture;
+use crate::opengl::texture::{PixelDataFormat, Texture as InnerTexture};
 use crate::vector::Vec2;
 
 mod reexports
@@ -35,9 +35,13 @@ impl Texture
             .decode()
             .map_err(Error::DecodeImageFailed)?;
 
-        if !matches!(image, DynamicImage::ImageRgb8(_)) {
-            return Err(Error::UnsupportedImageDataKind);
-        }
+        let pixel_data_format = match &image {
+            DynamicImage::ImageRgb8(_) => PixelDataFormat::Rgb,
+            DynamicImage::ImageRgba8(_) => PixelDataFormat::Rgba,
+            _ => {
+                return Err(Error::UnsupportedImageDataKind);
+            }
+        };
 
         let inner = InnerTexture::new();
 
@@ -46,6 +50,7 @@ impl Texture
                 &texture_curr_bound,
                 &Vec2 { x: image.width(), y: image.height() },
                 image.as_bytes(),
+                pixel_data_format,
             );
         });