flutter texture render, mid commit

Signed-off-by: fufesou <shuanglongchen@yeah.net>

libs/scrap/src/common/mod.rs

@@ -43,6 +43,13 @@ pub const HW_STRIDE_ALIGN: usize = 0; // recommended by av_frame_get_buffer
 pub mod record;
 mod vpx;
 
+#[derive(Copy, Clone)]
+pub enum ImageFormat {
+    Raw,
+    ABGR,
+    ARGB,
+}
+
 #[inline]
 pub fn would_block_if_equal(old: &mut Vec<u8>, b: &[u8]) -> std::io::Result<()> {
     // does this really help?