Fix creating non-hardware-accelerated contexts

src/lib.rs

@@ -197,6 +197,7 @@ pub enum MouseCursor {
 #[allow(missing_docs)]
 #[derive(Debug)]
 pub struct PixelFormat {
+    pub hardware_accelerated: bool,
     pub red_bits: u8,
     pub green_bits: u8,
     pub blue_bits: u8,
@@ -286,6 +287,10 @@ impl<'a> BuilderAttribs<'a> {
 
         // TODO: do this more properly
         for (id, format) in iter {
+            if !format.hardware_accelerated {
+                continue;
+            }
+
             if format.red_bits + format.green_bits + format.blue_bits < self.color_bits.unwrap_or(0) {
                 continue;
             }