add tonemapping shaders

shader/r_gbuffer.frag

@@ -0,0 +1,44 @@
+#version 460 core
+/**
+ * Copyright (c) 2018-2020 www.hyzgame.com
+ *
+ * Create by ShaderMaker
+ */
+layout(push_constant) uniform Consts
+{
+    mat4 local_to_world;
+    mat3 normal;
+    vec3 object_position;
+    vec3 object_size;
+} pc;
+layout(binding = 0) uniform WorldMatrix     // hgl/math/Math.h
+{
+    mat4 ortho;
+
+    mat4 projection;
+    mat4 inverse_projection;
+
+    mat4 modelview;
+    mat4 inverse_modelview;
+
+    mat4 mvp;
+    mat4 inverse_mvp;
+
+    vec4 view_pos;
+} world;
+
+layout(location=0) out vec4 gb_color_metallic;
+layout(location=1) out vec4 gb_normal_roughness;
+
+void main()
+{
+    vec3 BaseColor;
+    vec3 Normal;
+    float Metallic;
+    float Roughness;
+//[Begin] Your code------------------------------------
+
+//[End] Your code--------------------------------------
+    gb_color_metallic   =vec4(BaseColor,Metallic);
+    gb_normal_roughness =vec4(Normal,   Roughness);
+}