Fix the default blending (#560)

The Default::default of an Option is None, which disables blending. That line was supposed to enable the default blending mode in golem, which is a sensible blending default.
ryanisaacg · Jan 9, 2020 · 53758a2 · 53758a2
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commit 53758a2
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diff --git a/CHANGES.md b/CHANGES.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## In-development
+- Fix the default blend mode: it should mix colors using their alphas
 - [Breaking] Remove support for image types other than jpeg and png
 
 ## 0.4.0-alpha0

diff --git a/src/graphics.rs b/src/graphics.rs
@@ -95,7 +95,7 @@ impl Graphics {
         let vb = VertexBuffer::new(&ctx)?;
         let eb = ElementBuffer::new(&ctx)?;
         shader.bind();
-        ctx.set_blend_mode(Default::default());
+        ctx.set_blend_mode(Some(Default::default()));
 
         Ok(Graphics {
             ctx,