1 files changed, 59 insertions, 0 deletions
diff --git a/old/vgcodec/src/app.rs b/old/vgcodec/src/app.rs
new file mode 100644
index 0000000..b51284c
--- /dev/null
+++ b/old/vgcodec/src/app.rs
@@ -0,0 +1,59 @@
+use std::sync::Arc;
+
+use wgpu::{Adapter, Device, Extent3d, ImageCopyTexture, Instance, Origin3d, Queue, Texture};
+
+pub struct App {
+    pub instance: Instance,
+    pub device: Device,
+    pub adapter: Adapter,
+    pub queue: Queue,
+}
+
+impl App {
+    pub async fn new() -> Arc<Self> {
+        let instance = wgpu::Instance::new(wgpu::Backends::all());
+        let adapter = instance
+            .request_adapter(&wgpu::RequestAdapterOptions::default())
+            .await
+            .unwrap();
+        let (device, queue) = adapter
+            .request_device(
+                &wgpu::DeviceDescriptor {
+                    label: None,
+                    features: wgpu::Features::empty(),
+                    limits: wgpu::Limits::downlevel_defaults(),
+                },
+                None,
+            )
+            .await
+            .unwrap();
+        Arc::new(Self {
+            adapter,
+            device,
+            instance,
+            queue,
+        })
+    }
+
+    pub fn copy_texture(&self, source: &Texture, destination: &Texture, size: Extent3d) {
+        let mut encoder = self
+            .device
+            .create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None });
+        encoder.copy_texture_to_texture(
+            ImageCopyTexture {
+                aspect: wgpu::TextureAspect::All,
+                mip_level: 0,
+                origin: Origin3d::ZERO,
+                texture: source,
+            },
+            ImageCopyTexture {
+                aspect: wgpu::TextureAspect::All,
+                mip_level: 0,
+                origin: Origin3d::ZERO,
+                texture: destination,
+            },
+            size,
+        );
+        self.queue.submit(Some(encoder.finish()));
+    }
+}