Merge pull request #2259 from PolyMeilex/wgpu-image-workaround-wgpu-gl-heuristics

[wgpu.image] Workaround WGPU OpenGL heuristics

1 files changed, 11 insertions, 3 deletions

diff --git a/wgpu/src/image/atlas.rs b/wgpu/src/image/atlas.rs
index 789e35b4..ea36e06d 100644
--- a/wgpu/src/image/atlas.rs
+++ b/wgpu/src/image/atlas.rs
@@ -23,11 +23,19 @@ pub struct Atlas {
 }
 
 impl Atlas {
-    pub fn new(device: &wgpu::Device) -> Self {
+    pub fn new(device: &wgpu::Device, backend: wgpu::Backend) -> Self {
+        let layers = match backend {
+            // On the GL backend we start with 2 layers, to help wgpu figure
+            // out that this texture is `GL_TEXTURE_2D_ARRAY` rather than `GL_TEXTURE_2D`
+            // https://github.com/gfx-rs/wgpu/blob/004e3efe84a320d9331371ed31fa50baa2414911/wgpu-hal/src/gles/mod.rs#L371
+            wgpu::Backend::Gl => vec![Layer::Empty, Layer::Empty],
+            _ => vec![Layer::Empty],
+        };
+
         let extent = wgpu::Extent3d {
             width: SIZE,
             height: SIZE,
-            depth_or_array_layers: 1,
+            depth_or_array_layers: layers.len() as u32,
         };
 
         let texture = device.create_texture(&wgpu::TextureDescriptor {
@@ -55,7 +63,7 @@ impl Atlas {
         Atlas {
             texture,
             texture_view,
-            layers: vec![Layer::Empty],
+            layers,
         }
     }