dmabuf: add PlaneVec

src/video/dmabuf.rs

@@ -1,4 +1,9 @@
-use {crate::format::Format, std::rc::Rc, uapi::OwnedFd};
+use {
+    crate::{format::Format, video::Modifier},
+    arrayvec::ArrayVec,
+    std::rc::Rc,
+    uapi::OwnedFd,
+};
 
 #[derive(Clone)]
 pub struct DmaBufPlane {
@@ -12,6 +17,10 @@ pub struct DmaBuf {
     pub width: i32,
     pub height: i32,
     pub format: &'static Format,
-    pub modifier: u64,
-    pub planes: Vec<DmaBufPlane>,
+    pub modifier: Modifier,
+    pub planes: PlaneVec<DmaBufPlane>,
 }
+
+pub const MAX_PLANES: usize = 4;
+
+pub type PlaneVec<T> = ArrayVec<T, MAX_PLANES>;

src/video/gbm.rs

@@ -5,7 +5,7 @@ use {
         format::formats,
         utils::oserror::OsError,
         video::{
-            dmabuf::{DmaBuf, DmaBufPlane},
+            dmabuf::{DmaBuf, DmaBufPlane, PlaneVec},
             drm::{Drm, DrmError},
             ModifiedFormat, INVALID_MODIFIER,
         },
@@ -161,7 +161,7 @@ unsafe fn export_bo(bo: *mut Bo) -> Result<DmaBuf, GbmError> {
             }
         },
         planes: {
-            let mut planes = vec![];
+            let mut planes = PlaneVec::new();
             for plane in 0..gbm_bo_get_plane_count(bo) {
                 let offset = gbm_bo_get_offset(bo, plane);
                 let stride = gbm_bo_get_stride_for_plane(bo, plane);