update DrawRect2D shaders

shader/DrawRect2D.vert

@@ -1,6 +1,7 @@
 #version 450 core
 
 layout(location = 0) in vec4 Vertex;
+layout(location = 1) in vec4 TexCoord;
 
 layout(binding=0) uniform WorldMatrix     // hgl/math/Math.h
 {
@@ -20,6 +21,8 @@ layout(binding=0) uniform WorldMatrix     // hgl/math/Math.h
     vec2 viewport_resolution;
 }world;
 
+layout(location=0) out vec4 GeometryTexCoord;
+
 void main()
 {
     vec4 lt=vec4(Vertex.xy,vec2(0,1));
@@ -28,5 +31,7 @@ void main()
     vec4 lt_fin=lt*world.ortho;
     vec4 rb_fin=rb*world.ortho;
 
+    GeometryTexCoord=TexCoord;
+
     gl_Position=vec4(lt_fin.xy,rb_fin.xy);
 }