Use embedded glslang for runtime glsl-to-spirv and add Android example (#740)

Use embedded glslang for runtime glsl-to-spirv and add Android example

Cargo.toml

@@ -29,6 +29,22 @@ default = [
     "mp3",
     "x11",
 ]
+
+supported_android_features = [
+    # cpal is not supported yet
+    # "bevy_audio",
+    "bevy_dynamic_plugin",
+    "bevy_gilrs",
+    "bevy_gltf",
+    "bevy_wgpu",
+    "bevy_winit",
+    "render",
+    "png",
+    "hdr",
+    # "mp3",
+    "x11",
+]
+
 profiler = ["bevy_ecs/profiler", "bevy_diagnostic/profiler"]
 wgpu_trace = ["bevy_wgpu/trace"]
 
@@ -90,6 +106,11 @@ log = "0.4"
 ron = "0.6"
 anyhow = "1.0"
 
+# bevy (Android)
+[target.'cfg(target_os = "android")'.dependencies]
+ndk-glue = { version = "0.2", features = ["logger"] }
+android_logger = "0.9"
+
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 console_error_panic_hook = "0.1.6"
 console_log = { version = "0.2", features = ["color"] }
@@ -314,3 +335,16 @@ name = "assets_wasm"
 path = "examples/wasm/assets_wasm.rs"
 required-features = ["bevy_winit"]
 
+[[example]]
+name = "bevy_android"
+path = "examples/android/bevy_android.rs"
+crate-type = ["cdylib"]
+
+[package.metadata.android]
+build_targets = [ "aarch64-linux-android", "armv7-linux-androideabi" ]
+target_sdk_version = 28
+min_sdk_version = 28
+
+[[package.metadata.android.feature]]
+name = "android.hardware.vulkan.level"
+version = "1"

crates/bevy_render/Cargo.toml

@@ -48,7 +48,7 @@ parking_lot = "0.11.0"
 spirv-reflect = "0.2.3"
 
 [target.'cfg(all(not(target_os = "ios"), not(target_arch = "wasm32")))'.dependencies]
-bevy-glsl-to-spirv = "0.1.7"
+bevy-glsl-to-spirv = "0.2.0"
 
 [target.'cfg(target_os = "ios")'.dependencies]
 shaderc = "0.6.3"

crates/bevy_render/src/shader/shader.rs

@@ -28,12 +28,7 @@ fn glsl_to_spirv(
     stage: ShaderStage,
     shader_defs: Option<&[String]>,
 ) -> Vec<u32> {
-    use std::io::Read;
-
-    let mut output = bevy_glsl_to_spirv::compile(glsl_source, stage.into(), shader_defs).unwrap();
-    let mut spv_bytes = Vec::new();
-    output.read_to_end(&mut spv_bytes).unwrap();
-    bytes_to_words(&spv_bytes)
+    bevy_glsl_to_spirv::compile(glsl_source, stage.into(), shader_defs).unwrap()
 }
 
 #[cfg(target_os = "ios")]

examples/android/bevy_android.rs

@@ -0,0 +1,10 @@
+// Edit to run any single file example from Bevy.
+include!("../3d/3d_scene.rs");
+
+#[cfg_attr(
+    target_os = "android",
+    ndk_glue::main(logger(level = "trace", tag = "bevy_android"), backtrace = "full")
+)]
+pub fn android_main() {
+    main();
+}