1 files changed, 51 insertions, 0 deletions
diff --git a/src/texture.rs b/src/texture.rs
new file mode 100644
index 0000000..a7c9893
--- /dev/null
+++ b/src/texture.rs
@@ -0,0 +1,51 @@
+use glow::HasContext;
+use image::EncodableLayout;
+
+use crate::context;
+
+pub struct Texture {
+    pub tex: glow::Texture,
+}
+
+impl Texture {
+    pub fn new(ctx: &context::Context, bytes: &[u8]) -> Self {
+        let rgba = image::io::Reader::new(std::io::Cursor::new(bytes))
+            .with_guessed_format()
+            .expect("failed to guess image format")
+            .decode()
+            .expect("failed to decode image")
+            .into_rgba8();
+        let pixels = rgba.as_bytes();
+        unsafe {
+            let tex = ctx.gl.create_texture().expect("failed to create texture");
+            ctx.gl.bind_texture(glow::TEXTURE_2D, Some(tex));
+            ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_WRAP_S, glow::CLAMP_TO_EDGE as i32);
+            ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_WRAP_T, glow::CLAMP_TO_EDGE as i32);
+            ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_MIN_FILTER, glow::NEAREST as i32);
+            ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_MAG_FILTER, glow::NEAREST as i32);
+            ctx.gl.tex_image_2d(
+                glow::TEXTURE_2D,
+                0,
+                glow::RGBA as i32,
+                rgba.width() as i32,
+                rgba.height() as i32,
+                0,
+                glow::RGBA,
+                glow::UNSIGNED_BYTE,
+                Some(pixels),
+            );
+            ctx.gl.generate_mipmap(glow::TEXTURE_2D);
+
+            Self {
+                tex,
+            }
+        }
+    }
+
+    pub fn bind(&self, ctx: &context::Context) {
+        unsafe {
+            ctx.gl.active_texture(glow::TEXTURE0);
+            ctx.gl.bind_texture(glow::TEXTURE_2D, Some(self.tex));
+        }
+    }
+}