render: implement a vulkan renderer

src/gfx_apis.rs

@@ -1,13 +1,49 @@
 use {
     crate::{
+        async_engine::AsyncEngine,
         gfx_api::{GfxContext, GfxError},
+        io_uring::IoUring,
+        utils::errorfmt::ErrorFmt,
         video::drm::Drm,
     },
+    jay_config::video::GfxApi,
     std::rc::Rc,
 };
 
 pub mod gl;
+mod vulkan;
 
-pub fn create_gfx_context(drm: &Drm) -> Result<Rc<dyn GfxContext>, GfxError> {
-    gl::create_gfx_context(drm)
+pub fn create_gfx_context(
+    eng: &Rc<AsyncEngine>,
+    ring: &Rc<IoUring>,
+    drm: &Drm,
+    api: GfxApi,
+) -> Result<Rc<dyn GfxContext>, GfxError> {
+    let mut apis = [GfxApi::OpenGl, GfxApi::Vulkan];
+    apis.sort_by_key(|&a| if a == api { -1 } else { a as i32 });
+    let mut last_err = None;
+    for api in apis {
+        let res = create_gfx_context_(eng, ring, drm, api);
+        match res {
+            Ok(_) => return res,
+            Err(e) => {
+                log::warn!("Could not create {:?} API: {}", api, ErrorFmt(&e));
+                last_err = Some(e);
+            }
+        }
+    }
+    Err(last_err.unwrap())
+}
+
+fn create_gfx_context_(
+    eng: &Rc<AsyncEngine>,
+    ring: &Rc<IoUring>,
+    drm: &Drm,
+    api: GfxApi,
+) -> Result<Rc<dyn GfxContext>, GfxError> {
+    match api {
+        GfxApi::OpenGl => gl::create_gfx_context(drm),
+        GfxApi::Vulkan => vulkan::create_graphics_context(eng, ring, drm),
+        _ => unreachable!(),
+    }
 }