fix(refr): NOT draw if scale is 0

Signed-off-by: pengyiqiang <pengyiqiang@xiaomi.com>

src/core/lv_obj_style.h

@@ -273,14 +273,14 @@ lv_text_align_t lv_obj_calculate_style_text_align(const lv_obj_t * obj, lv_part_
 
 static inline int32_t lv_obj_get_style_transform_scale_x_safe(const lv_obj_t * obj, lv_part_t part)
 {
-    int16_t zoom = lv_obj_get_style_transform_scale_x(obj, part);
-    return zoom != 0 ? zoom : 1;
+    int32_t scale = lv_obj_get_style_transform_scale_x(obj, part);
+    return scale > 0 ? scale : 1;
 }
 
 static inline int32_t lv_obj_get_style_transform_scale_y_safe(const lv_obj_t * obj, lv_part_t part)
 {
-    int16_t zoom = lv_obj_get_style_transform_scale_y(obj, part);
-    return zoom != 0 ? zoom : 1;
+    int32_t scale = lv_obj_get_style_transform_scale_y(obj, part);
+    return scale > 0 ? scale : 1;
 }
 
 /**

src/core/lv_refr.c

@@ -923,6 +923,11 @@ static void refr_obj_matrix(lv_layer_t * layer, lv_obj_t * obj)
     int32_t skew_x = lv_obj_get_style_transform_skew_x(obj, 0);
     int32_t skew_y = lv_obj_get_style_transform_skew_y(obj, 0);
 
+    if(scale_x <= 0 || scale_y <= 0) {
+        /* NOT draw if scale is negative or zero */
+        return;
+    }
+
     /* generate the obj matrix */
     lv_matrix_translate(&obj_matrix, pivot.x, pivot.y);
     if(rotation != 0) {

src/draw/lv_draw_image.c

@@ -65,6 +65,11 @@ lv_draw_image_dsc_t * lv_draw_task_get_image_dsc(lv_draw_task_t * task)
 
 void lv_draw_layer(lv_layer_t * layer, const lv_draw_image_dsc_t * dsc, const lv_area_t * coords)
 {
+    if(dsc->scale_x <= 0 || dsc->scale_y <= 0) {
+        /* NOT draw if scale is negative or zero */
+        return;
+    }
+
     lv_draw_task_t * t = lv_draw_add_task(layer, coords);
 
     t->draw_dsc = lv_malloc(sizeof(*dsc));
@@ -90,6 +95,11 @@ void lv_draw_image(lv_layer_t * layer, const lv_draw_image_dsc_t * dsc, const lv
     }
     if(dsc->opa <= LV_OPA_MIN) return;
 
+    if(dsc->scale_x <= 0 || dsc->scale_y <= 0) {
+        /* NOT draw if scale is negative or zero */
+        return;
+    }
+
     LV_PROFILER_BEGIN;
 
     lv_draw_image_dsc_t * new_image_dsc = lv_malloc(sizeof(*dsc));