1 files changed, 33 insertions, 0 deletions
diff --git a/src/lua/embed/graphics.lua.h b/src/lua/embed/graphics.lua.h
index 1414efc..1bad4f5 100644
--- a/src/lua/embed/graphics.lua.h
+++ b/src/lua/embed/graphics.lua.h
@@ -1,4 +1,37 @@
 /* graphics.lua */
 static const char* graphics_lua = R"(
 jin.graphics = jin.graphics or {} 
+
+local default_shader = nil
+local default_shader_source = [[
+#VERTEX_SHADER
+
+Vertex vert(Vertex v)
+{
+    return v;
+}
+
+#END_VERTEX_SHADER
+
+#FRAGMENT_SHADER
+
+Color frag(Color col, Texture tex, Vertex v)
+{
+    return col;
+}
+
+#END_FRAGMENT_SHADER
+]]
+local _init = jin.graphics.init
+
+jin.graphics.init = function(setting) 
+    _init(setting);
+    default_shader = jin.graphics.newShader(default_shader_source)
+    jin.graphics.useShader(default_shader)
+end
+
+jin.graphics.unuseShader = function()
+    jin.graphics.useShader(default_shader)
+end
+
 )";