bringing docs up to date

src/canvas/managed/shader/generic_shader.rs

@@ -18,6 +18,7 @@ use crate::canvas::managed::shader::shader_common::{ShaderType, CompiledGraphics
 use crate::canvas::managed::handles::CompiledShaderHandle;
 use crate::canvas::managed::shader::dynamic_vertex::RuntimeVertexDef;
 use crate::canvas::managed::ShaderSpecializationConstants;
+use crate::util::vertex::VertexTypes;
 
 /// CanvasShader holds the pipeline and render pass for the input shader source
 #[derive(Clone)]
@@ -32,7 +33,12 @@ pub struct GenericShader {
 }
 
 
-impl GenericShader {}
+impl GenericShader {
+
+    fn get(&self) -> VertexTypes {
+        VertexTypes::ImageType
+    }
+}
 
 /// Gives CanvasShader the resource functions
 impl CompiledGraphicsPipelineResources for GenericShader {}