Experimental wgpu WebGL backend support

- Added missing `draw_cache_align_4x4` call for `brush_glyph` on wasm32 target
- Added WebGL support to `integratio_wgpu` example
- Fixed test.yml CI workflow
- Removed spir-v shader in `integration_wgpu`; Fixed formatting
- Removed redundant `BoxStream` typedef

4 files changed, 10 insertions, 0 deletions

diff --git a/examples/integration_wgpu/src/shader/frag.spv b/examples/integration_wgpu/src/shader/frag.spv
deleted file mode 100644
index 9d6807c9..00000000
--- a/examples/integration_wgpu/src/shader/frag.spv
+++ /dev/null
diff --git a/examples/integration_wgpu/src/shader/frag.wgsl b/examples/integration_wgpu/src/shader/frag.wgsl
new file mode 100644
index 00000000..a6f61336
--- /dev/null
+++ b/examples/integration_wgpu/src/shader/frag.wgsl
@@ -0,0 +1,4 @@
+[[stage(fragment)]]
+fn main() -> [[location(0)]] vec4<f32> {
+    return vec4<f32>(1.0, 0.0, 0.0, 1.0);
+}
diff --git a/examples/integration_wgpu/src/shader/vert.spv b/examples/integration_wgpu/src/shader/vert.spv
deleted file mode 100644
index 0cabc9c0..00000000
--- a/examples/integration_wgpu/src/shader/vert.spv
+++ /dev/null
diff --git a/examples/integration_wgpu/src/shader/vert.wgsl b/examples/integration_wgpu/src/shader/vert.wgsl
new file mode 100644
index 00000000..7ef47fb2
--- /dev/null
+++ b/examples/integration_wgpu/src/shader/vert.wgsl
@@ -0,0 +1,6 @@
+[[stage(vertex)]]
+fn main([[builtin(vertex_index)]] in_vertex_index: u32) -> [[builtin(position)]] vec4<f32> {
+    let x = f32(1 - i32(in_vertex_index)) * 0.5;
+    let y = f32(1 - i32(in_vertex_index & 1u) * 2) * 0.5;
+    return vec4<f32>(x, y, 0.0, 1.0);
+}