feat():initial version

insDavi2.0/Res/shader/prog_font_attr_alpha.fp

@@ -0,0 +1,10 @@
+uniform sampler2D u_sam_tex;
+uniform vec3 u_v3_clr;
+uniform float u_flt_inv_alpha;
+varying vec2 v_v2_txc;
+varying float v_flt_alpha;
+void main()
+{
+	float alpha = texture2D(u_sam_tex, v_v2_txc).a*v_flt_alpha;
+	gl_FragColor = vec4(u_v3_clr.r, u_v3_clr.g, u_v3_clr.b, (1.0-u_flt_inv_alpha)*alpha);
+}