fixed alpha blending for 'radial' inner circle

render.c

@@ -784,10 +784,10 @@ struct renderer* rd_new(const char** paths, const char* entry, const char* force
                     
                     #ifdef GLFW_TRANSPARENT_FRAMEBUFFER
                     glfwWindowHint(GLFW_TRANSPARENT_FRAMEBUFFER, native_opacity ? GLFW_TRUE : GLFW_FALSE);
-                    if (native_opacity) gl->use_alpha = false;
+                    // if (native_opacity) gl->use_alpha = false;
                     #elif GLFW_TRANSPARENT
                     glfwWindowHint(GLFW_TRANSPARENT, native_opacity ? GLFW_TRUE : GLFW_FALSE);
-                    if (native_opacity) gl->use_alpha = false;
+                    // if (native_opacity) gl->use_alpha = false;
                     #else
                     if (native_opacity)
                         printf("WARNING: the linked version of GLFW3 does not have transparency support"

shaders/radial/1.frag

@@ -32,7 +32,7 @@ void main() {
 
     #if USE_ALPHA > 0
     #define APPLY_FRAG(f, c) f = vec4(f.rgb * f.a + c.rgb * (1 - f.a), max(c.a, f.a))
-    fragment.a = 0;
+    fragment.a;
     #else
     #define APPLY_FRAG(f, c) f = c
     #endif
@@ -46,9 +46,9 @@ void main() {
     float theta = atan(dy, dx); /* fragment angle with the center of the screen as the origin */
     float d = sqrt((dx * dx) + (dy * dy)); /* distance */
     if (d > C_RADIUS - (float(C_LINE) / 2.0F) && d < C_RADIUS + (float(C_LINE) / 2.0F)) {
-        fragment = OUTLINE;
+        APPLY_FRAG(fragment, OUTLINE);
         #if USE_ALPHA > 0
-        fragment.a *= ((float(C_LINE) / 2.0F) - abs(d - C_RADIUS)) * C_ALIAS_FACTOR;
+        fragment.a *= clamp(((C_LINE / 2) - abs(C_RADIUS - d)) * C_ALIAS_FACTOR, 0, 1);
         #else
         return; /* return immediately if there is no alpha blending available */
         #endif

shaders/rc.glsl

@@ -55,7 +55,7 @@
 
 /* Window background color (RGB format).
    Only works with `setopacity "none"` */
-#request setbg 3C3C3C
+#request setbg 000000
 
 /* (X11 only) EWMH Window type. Possible values are: