Added support for custom shader widget for iced_wgpu backend.

1 files changed, 39 insertions, 0 deletions

diff --git a/examples/custom_shader/src/primitive/buffer.rs b/examples/custom_shader/src/primitive/buffer.rs
new file mode 100644
index 00000000..377ce1bb
--- /dev/null
+++ b/examples/custom_shader/src/primitive/buffer.rs
@@ -0,0 +1,39 @@
+// A custom buffer container for dynamic resizing.
+pub struct Buffer {
+    pub raw: wgpu::Buffer,
+    label: &'static str,
+    size: u64,
+    usage: wgpu::BufferUsages,
+}
+
+impl Buffer {
+    pub fn new(
+        device: &wgpu::Device,
+        label: &'static str,
+        size: u64,
+        usage: wgpu::BufferUsages,
+    ) -> Self {
+        Self {
+            raw: device.create_buffer(&wgpu::BufferDescriptor {
+                label: Some(label),
+                size,
+                usage,
+                mapped_at_creation: false,
+            }),
+            label,
+            size,
+            usage,
+        }
+    }
+
+    pub fn resize(&mut self, device: &wgpu::Device, new_size: u64) {
+        if new_size > self.size {
+            self.raw = device.create_buffer(&wgpu::BufferDescriptor {
+                label: Some(self.label),
+                size: new_size,
+                usage: self.usage,
+                mapped_at_creation: false,
+            });
+        }
+    }
+}