Move `Target` to its own module

1 files changed, 74 insertions, 0 deletions

diff --git a/wgpu/src/renderer/target.rs b/wgpu/src/renderer/target.rs
new file mode 100644
index 00000000..d9d05bf0
--- /dev/null
+++ b/wgpu/src/renderer/target.rs
@@ -0,0 +1,74 @@
+use crate::{Renderer, Transformation};
+
+use raw_window_handle::HasRawWindowHandle;
+
+pub struct Target {
+    surface: wgpu::Surface,
+    width: u16,
+    height: u16,
+    transformation: Transformation,
+    swap_chain: wgpu::SwapChain,
+}
+
+impl Target {
+    pub fn dimensions(&self) -> (u16, u16) {
+        (self.width, self.height)
+    }
+
+    pub fn transformation(&self) -> Transformation {
+        self.transformation
+    }
+
+    pub fn next_frame(&mut self) -> wgpu::SwapChainOutput {
+        self.swap_chain.get_next_texture()
+    }
+}
+
+impl iced_native::renderer::Target for Target {
+    type Renderer = Renderer;
+
+    fn new<W: HasRawWindowHandle>(
+        window: &W,
+        width: u16,
+        height: u16,
+        renderer: &Renderer,
+    ) -> Target {
+        let surface = wgpu::Surface::create(window);
+        let swap_chain =
+            new_swap_chain(&surface, width, height, &renderer.device);
+
+        Target {
+            surface,
+            width,
+            height,
+            transformation: Transformation::orthographic(width, height),
+            swap_chain,
+        }
+    }
+
+    fn resize(&mut self, width: u16, height: u16, renderer: &Renderer) {
+        self.width = width;
+        self.height = height;
+        self.transformation = Transformation::orthographic(width, height);
+        self.swap_chain =
+            new_swap_chain(&self.surface, width, height, &renderer.device);
+    }
+}
+
+fn new_swap_chain(
+    surface: &wgpu::Surface,
+    width: u16,
+    height: u16,
+    device: &wgpu::Device,
+) -> wgpu::SwapChain {
+    device.create_swap_chain(
+        &surface,
+        &wgpu::SwapChainDescriptor {
+            usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
+            format: wgpu::TextureFormat::Bgra8UnormSrgb,
+            width: u32::from(width),
+            height: u32::from(height),
+            present_mode: wgpu::PresentMode::Vsync,
+        },
+    )
+}