gpu_display: provides wayland based output for virtio-gpu

This provides virtual display style output, useful for debugging
virtio-gpu. Although using virtio-gpu for display purposes clashes with
the more integreated virtio-wayland support, it is nonetheless helpful
for debugging virtio-gpu, and is technically required to fully implement
that device.

TEST=cargo build -p gpu_display
BUG=chromium:837073
CQ-DEPEND=CL:1096300

Change-Id: I59f895e951ef593d4119e7558168dd34223519ee
Reviewed-on: https://chromium-review.googlesource.com/1043446
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/gpu_display/src/dwl.rs b/gpu_display/src/dwl.rs
new file mode 100644
index 0000000..9101c82
--- /dev/null
+++ b/gpu_display/src/dwl.rs
@@ -0,0 +1,81 @@
+/* automatically generated by rust-bindgen */
+
+# [ repr ( C ) ]
+# [ derive ( Debug , Copy , Clone ) ]
+pub struct dwl_context {
+    _unused: [u8; 0],
+}
+# [ repr ( C ) ]
+# [ derive ( Debug , Copy , Clone ) ]
+pub struct dwl_dmabuf {
+    _unused: [u8; 0],
+}
+# [ repr ( C ) ]
+# [ derive ( Debug , Copy , Clone ) ]
+pub struct dwl_surface {
+    _unused: [u8; 0],
+}
+extern "C" {
+    pub fn dwl_context_new() -> *mut dwl_context;
+}
+extern "C" {
+    pub fn dwl_context_destroy(self_: *mut *mut dwl_context);
+}
+extern "C" {
+    pub fn dwl_context_setup(self_: *mut dwl_context) -> bool;
+}
+extern "C" {
+    pub fn dwl_context_fd(self_: *mut dwl_context) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn dwl_context_dispatch(self_: *mut dwl_context);
+}
+extern "C" {
+    pub fn dwl_context_dmabuf_new(self_: *mut dwl_context,
+                                  fd: ::std::os::raw::c_int,
+                                  offset: u32,
+                                  stride: u32,
+                                  modifiers: u64,
+                                  width: u32,
+                                  height: u32,
+                                  fourcc: u32)
+                                  -> *mut dwl_dmabuf;
+}
+extern "C" {
+    pub fn dwl_dmabuf_in_use(self_: *mut dwl_dmabuf) -> bool;
+}
+extern "C" {
+    pub fn dwl_dmabuf_destroy(self_: *mut *mut dwl_dmabuf);
+}
+extern "C" {
+    pub fn dwl_context_surface_new(self_: *mut dwl_context,
+                                   parent: *mut dwl_surface,
+                                   shm_fd: ::std::os::raw::c_int,
+                                   shm_size: usize,
+                                   buffer_size: usize,
+                                   width: u32,
+                                   height: u32,
+                                   stride: u32)
+                                   -> *mut dwl_surface;
+}
+extern "C" {
+    pub fn dwl_surface_destroy(self_: *mut *mut dwl_surface);
+}
+extern "C" {
+    pub fn dwl_surface_commit(self_: *mut dwl_surface);
+}
+extern "C" {
+    pub fn dwl_surface_buffer_in_use(self_: *mut dwl_surface, buffer_index: usize) -> bool;
+}
+extern "C" {
+    pub fn dwl_surface_flip(self_: *mut dwl_surface, buffer_index: usize);
+}
+extern "C" {
+    pub fn dwl_surface_flip_to(self_: *mut dwl_surface, dmabuf: *mut dwl_dmabuf);
+}
+extern "C" {
+    pub fn dwl_surface_close_requested(self_: *const dwl_surface) -> bool;
+}
+extern "C" {
+    pub fn dwl_surface_set_position(self_: *mut dwl_surface, x: u32, y: u32);
+}
\ No newline at end of file