fix(draw): revert handling of style_opa on not MAIN parts

src/core/lv_obj_draw.c

@@ -38,11 +38,24 @@
 
 void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint32_t part, lv_draw_rect_dsc_t * draw_dsc)
 {
+    lv_opa_t opa;
+    if(part != LV_PART_MAIN) {
+        opa = lv_obj_get_style_opa(obj, part);
+        if(opa <= LV_OPA_MIN) {
+            draw_dsc->bg_opa = LV_OPA_TRANSP;
+            draw_dsc->bg_img_opa = LV_OPA_TRANSP;
+            draw_dsc->border_opa = LV_OPA_TRANSP;
+            draw_dsc->outline_opa = LV_OPA_TRANSP;
+            draw_dsc->shadow_opa = LV_OPA_TRANSP;
+            return;
+        }
+    }
 
 #if LV_DRAW_COMPLEX
-    draw_dsc->radius = lv_obj_get_style_radius(obj, part);
     if(part != LV_PART_MAIN) draw_dsc->blend_mode = lv_obj_get_style_blend_mode(obj, part);
 
+    draw_dsc->radius = lv_obj_get_style_radius(obj, part);
+
     if(draw_dsc->bg_opa != LV_OPA_TRANSP) {
         draw_dsc->bg_opa = lv_obj_get_style_bg_opa(obj, part);
         if(draw_dsc->bg_opa > LV_OPA_MIN) {
@@ -167,6 +180,16 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint32_t part, lv_draw_rect_dsc_t
         }
     }
 #endif
+
+    if(part != LV_PART_MAIN) {
+        if(opa < LV_OPA_MAX) {
+            draw_dsc->bg_opa = (opa * draw_dsc->shadow_opa) >> 8;
+            draw_dsc->bg_img_opa = (opa * draw_dsc->shadow_opa) >> 8;
+            draw_dsc->border_opa = (opa * draw_dsc->shadow_opa) >> 8;
+            draw_dsc->outline_opa = (opa * draw_dsc->shadow_opa) >> 8;
+            draw_dsc->shadow_opa = (opa * draw_dsc->shadow_opa) >> 8;
+        }
+    }
 }
 
 void lv_obj_init_draw_label_dsc(lv_obj_t * obj, uint32_t part, lv_draw_label_dsc_t * draw_dsc)
@@ -174,6 +197,17 @@ void lv_obj_init_draw_label_dsc(lv_obj_t * obj, uint32_t part, lv_draw_label_dsc
     draw_dsc->opa = lv_obj_get_style_text_opa(obj, part);
     if(draw_dsc->opa <= LV_OPA_MIN) return;
 
+    if(part != LV_PART_MAIN) {
+        lv_opa_t opa = lv_obj_get_style_opa(obj, part);
+        if(opa <= LV_OPA_MIN) {
+            draw_dsc->opa = LV_OPA_TRANSP;
+            return;
+        }
+        if(opa < LV_OPA_MAX) {
+            draw_dsc->opa = (opa * draw_dsc->opa) >> 8;
+        }
+    }
+
     draw_dsc->color = lv_obj_get_style_text_color_filtered(obj, part);
     draw_dsc->letter_space = lv_obj_get_style_text_letter_space(obj, part);
     draw_dsc->line_space = lv_obj_get_style_text_line_space(obj, part);
@@ -194,7 +228,18 @@ void lv_obj_init_draw_label_dsc(lv_obj_t * obj, uint32_t part, lv_draw_label_dsc
 void lv_obj_init_draw_img_dsc(lv_obj_t * obj, uint32_t part, lv_draw_img_dsc_t * draw_dsc)
 {
     draw_dsc->opa = lv_obj_get_style_img_opa(obj, part);
-    if(draw_dsc->opa <= LV_OPA_MIN)  return;
+    if(draw_dsc->opa <= LV_OPA_MIN) return;
+
+    if(part != LV_PART_MAIN) {
+        lv_opa_t opa = lv_obj_get_style_opa(obj, part);
+        if(opa <= LV_OPA_MIN) {
+            draw_dsc->opa = LV_OPA_TRANSP;
+            return;
+        }
+        if(opa < LV_OPA_MAX) {
+            draw_dsc->opa = (opa * draw_dsc->opa) >> 8;
+        }
+    }
 
     draw_dsc->angle = 0;
     draw_dsc->zoom = LV_IMG_ZOOM_NONE;
@@ -212,12 +257,23 @@ void lv_obj_init_draw_img_dsc(lv_obj_t * obj, uint32_t part, lv_draw_img_dsc_t *
 
 void lv_obj_init_draw_line_dsc(lv_obj_t * obj, uint32_t part, lv_draw_line_dsc_t * draw_dsc)
 {
-    draw_dsc->width = lv_obj_get_style_line_width(obj, part);
-    if(draw_dsc->width == 0) return;
-
     draw_dsc->opa = lv_obj_get_style_line_opa(obj, part);
     if(draw_dsc->opa <= LV_OPA_MIN)  return;
 
+    if(part != LV_PART_MAIN) {
+        lv_opa_t opa = lv_obj_get_style_opa(obj, part);
+        if(opa <= LV_OPA_MIN) {
+            draw_dsc->opa = LV_OPA_TRANSP;
+            return;
+        }
+        if(opa < LV_OPA_MAX) {
+            draw_dsc->opa = (opa * draw_dsc->opa) >> 8;
+        }
+    }
+
+    draw_dsc->width = lv_obj_get_style_line_width(obj, part);
+    if(draw_dsc->width == 0) return;
+
     draw_dsc->color = lv_obj_get_style_line_color_filtered(obj, part);
 
     draw_dsc->dash_width = lv_obj_get_style_line_dash_width(obj, part);
@@ -241,6 +297,17 @@ void lv_obj_init_draw_arc_dsc(lv_obj_t * obj, uint32_t part, lv_draw_arc_dsc_t *
     draw_dsc->opa = lv_obj_get_style_arc_opa(obj, part);
     if(draw_dsc->opa <= LV_OPA_MIN)  return;
 
+    if(part != LV_PART_MAIN) {
+        lv_opa_t opa = lv_obj_get_style_opa(obj, part);
+        if(opa <= LV_OPA_MIN) {
+            draw_dsc->opa = LV_OPA_TRANSP;
+            return;
+        }
+        if(opa < LV_OPA_MAX) {
+            draw_dsc->opa = (opa * draw_dsc->opa) >> 8;
+        }
+    }
+
     draw_dsc->color = lv_obj_get_style_arc_color_filtered(obj, part);
     draw_dsc->img_src = lv_obj_get_style_arc_img_src(obj, part);