1 files changed, 51 insertions, 0 deletions
diff --git a/src/graphics/image.rs b/src/graphics/image.rs
new file mode 100644
index 0000000..26833c0
--- /dev/null
+++ b/src/graphics/image.rs
@@ -0,0 +1,51 @@
+// TODO: このファイルは好きな設計ではないので破壊する。
+
+use super::texture::TextureWrapper;
+use png::{BitDepth, ColorType, Decoder};
+use std::io::Cursor;
+use wgpu::{Device, Queue, TextureFormat, TextureUsages};
+
+#[derive(Clone, Copy)]
+pub enum ImageId {
+    Image,
+}
+
+static IMAGE_DATAS: [&[u8]; 1] = [include_bytes!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/assets/image.png"
+))];
+
+pub fn create_textures(device: &Device, queue: &Queue) -> Vec<TextureWrapper> {
+    IMAGE_DATAS
+        .iter()
+        .map(|data| create_texture(device, queue, data))
+        .collect()
+}
+
+fn create_texture(device: &Device, queue: &Queue, data: &[u8]) -> TextureWrapper {
+    let mut reader = Decoder::new(Cursor::new(data))
+        .read_info()
+        .expect("fatal: failed to load image");
+    let mut buf = vec![
+        0x00;
+        reader
+            .output_buffer_size()
+            .expect("fatal: image is too large")
+    ];
+    let info = reader
+        .next_frame(&mut buf)
+        .expect("fatal: failed to decode image");
+    if info.color_type != ColorType::Rgba || info.bit_depth != BitDepth::Eight {
+        panic!("fatal: image is not 8-bit RGBA");
+    }
+
+    let texture = TextureWrapper::new(
+        device,
+        info.width,
+        info.height,
+        TextureFormat::Rgba8UnormSrgb,
+        TextureUsages::TEXTURE_BINDING | TextureUsages::COPY_DST,
+    );
+    texture.write(queue, &buf[..info.buffer_size()]);
+    texture
+}