From 4e7159c22c6be90f61aa715d5eb6811f805cb597 Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Fri, 28 Feb 2020 14:38:42 +0100
Subject: Stop creating image pipeline when unnecessary

---
 wgpu/src/image/atlas/allocation.rs | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 wgpu/src/image/atlas/allocation.rs

(limited to 'wgpu/src/image/atlas/allocation.rs')

diff --git a/wgpu/src/image/atlas/allocation.rs b/wgpu/src/image/atlas/allocation.rs
new file mode 100644
index 00000000..59b7239f
--- /dev/null
+++ b/wgpu/src/image/atlas/allocation.rs
@@ -0,0 +1,35 @@
+use crate::image::atlas::{self, allocator};
+
+#[derive(Debug)]
+pub enum Allocation {
+    Partial {
+        layer: usize,
+        region: allocator::Region,
+    },
+    Full {
+        layer: usize,
+    },
+}
+
+impl Allocation {
+    pub fn position(&self) -> (u32, u32) {
+        match self {
+            Allocation::Partial { region, .. } => region.position(),
+            Allocation::Full { .. } => (0, 0),
+        }
+    }
+
+    pub fn size(&self) -> (u32, u32) {
+        match self {
+            Allocation::Partial { region, .. } => region.size(),
+            Allocation::Full { .. } => (atlas::SIZE, atlas::SIZE),
+        }
+    }
+
+    pub fn layer(&self) -> usize {
+        match self {
+            Allocation::Partial { layer, .. } => *layer,
+            Allocation::Full { layer } => *layer,
+        }
+    }
+}
-- 
cgit