Merge branch 'master' of https://github.com/ali-rostami/lvgl into ali-rostami-master

lv_objx/lv_img.c

@@ -78,6 +78,8 @@ lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
     ext->w = lv_obj_get_width(new_img);
     ext->h = lv_obj_get_height(new_img);
     ext->auto_size = 1;
+    ext->offset.x = 0;
+    ext->offset.y = 0;
 #if USE_LV_MULTI_LANG
     ext->lang_txt_id = LV_LANG_TXT_ID_NONE;
 #endif
@@ -235,6 +237,52 @@ void lv_img_set_auto_size(lv_obj_t * img, bool en)
     ext->auto_size = (en == false ? 0 : 1);
 }
 
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param x: the new offset along x axis.
+ * @param y: the new offset along y axis.
+ */
+void lv_img_set_offset(lv_obj_t *img, lv_coord_t x, lv_coord_t y)
+{
+    lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
+
+    if((x < ext->w - 1) && (y < ext->h - 1)) {
+        ext->offset.x = x;
+        ext->offset.y = y;
+    }
+}
+
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param x: the new offset along x axis.
+ */
+void lv_img_set_offset_x(lv_obj_t *img, lv_coord_t x)
+{
+    lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
+
+    if(x < ext->w - 1) {
+        ext->offset.x = x;
+    }
+}
+
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param y: the new offset along y axis.
+ */
+void lv_img_set_offset_y(lv_obj_t *img, lv_coord_t y)
+{
+    lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
+
+    if(y < ext->h - 1) {
+        ext->offset.y = y;
+    }
+}
 
 /*=====================
  * Getter functions
@@ -325,6 +373,9 @@ static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode
         lv_obj_get_coords(img, &coords);
 
         if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_VARIABLE) {
+            coords.x1 -= ext->offset.x;
+            coords.y1 -= ext->offset.y;
+            
             LV_LOG_TRACE("lv_img_design: start to draw image");
             lv_area_t cords_tmp;
             cords_tmp.y1 = coords.y1;

lv_objx/lv_img.h

@@ -40,7 +40,7 @@ typedef struct
     /*No inherited ext. because inherited from the base object*/ /*Ext. of ancestor*/
     /*New data for this type */
     const void * src;             /*Image source: Pointer to an array or a file or a symbol*/
-
+    lv_point_t offset;
     lv_coord_t w;               /*Width of the image (Handled by the library)*/
     lv_coord_t h;               /*Height of the image (Handled by the library)*/
 #if USE_LV_MULTI_LANG
@@ -103,6 +103,31 @@ static inline void lv_img_set_file(lv_obj_t * img, const char * fn)
  */
 void lv_img_set_auto_size(lv_obj_t * img, bool autosize_en);
 
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param x: the new offset along x axis.
+ * @param y: the new offset along y axis.
+ */
+void lv_img_set_offset(lv_obj_t *img, lv_coord_t x, lv_coord_t y);
+
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param x: the new offset along x axis.
+ */
+void lv_img_set_offset_x(lv_obj_t *img, lv_coord_t x);
+
+/**
+ * Set an offset for the source of an image.
+ * so the image will be displayed from the new origin.
+ * @param img pointer to an image
+ * @param y: the new offset along y axis.
+ */
+void lv_img_set_offset_y(lv_obj_t *img, lv_coord_t y);
+    
 /**
  * Set the style of an image
  * @param img pointer to an image object