fix(vg_lite): fixed clip_radius image cropping error (#6780)

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

src/draw/vg_lite/lv_draw_vg_lite_img.c

@@ -134,22 +134,17 @@ void lv_draw_vg_lite_img(lv_draw_unit_t * draw_unit, const lv_draw_image_dsc_t *
         lv_vg_lite_path_t * path = lv_vg_lite_path_get(u, VG_LITE_FP32);
 
         if(dsc->clip_radius) {
-            int32_t width = lv_area_get_width(coords);
-            int32_t height = lv_area_get_height(coords);
-            float r_short = LV_MIN(width, height) / 2.0f;
-            float radius = LV_MIN(dsc->clip_radius, r_short);
-
-            /**
-             * When clip_radius is enabled, the clipping edges
-             * are aligned with the image edges
-             */
+            /* apply the image transform to the path */
+            lv_vg_lite_path_set_transform(path, &matrix);
             lv_vg_lite_path_append_rect(
                 path,
-                coords->x1, coords->y1,
-                width, height,
-                radius);
+                0, 0,
+                lv_area_get_width(coords), lv_area_get_height(coords),
+                dsc->clip_radius);
+            lv_vg_lite_path_set_transform(path, NULL);
         }
         else {
+            /* append normal rect to the path */
             lv_vg_lite_path_append_rect(
                 path,
                 clip_area.x1, clip_area.y1,

src/draw/vg_lite/lv_vg_lite_path.c

@@ -36,8 +36,10 @@
 
 struct lv_vg_lite_path_t {
     vg_lite_path_t base;
+    vg_lite_matrix_t matrix;
     size_t mem_size;
     uint8_t format_len;
+    bool has_transform;
 };
 
 typedef struct {
@@ -138,6 +140,7 @@ void lv_vg_lite_path_reset(lv_vg_lite_path_t * path, vg_lite_format_t data_forma
     path->base.quality = VG_LITE_MEDIUM;
     path->base.path_type = VG_LITE_DRAW_ZERO;
     path->format_len = lv_vg_lite_path_format_len(data_format);
+    path->has_transform = false;
 }
 
 vg_lite_path_t * lv_vg_lite_path_get_path(lv_vg_lite_path_t * path)
@@ -234,6 +237,16 @@ bool lv_vg_lite_path_update_bonding_box(lv_vg_lite_path_t * path)
     return true;
 }
 
+void lv_vg_lite_path_set_transform(lv_vg_lite_path_t * path, const vg_lite_matrix_t * matrix)
+{
+    LV_ASSERT_NULL(path);
+    if(matrix) {
+        path->matrix = *matrix;
+    }
+
+    path->has_transform = matrix ? true : false;
+}
+
 void lv_vg_lite_path_set_quality(lv_vg_lite_path_t * path, vg_lite_quality_t quality)
 {
     LV_ASSERT_NULL(path);
@@ -267,6 +280,15 @@ static void lv_vg_lite_path_append_op(lv_vg_lite_path_t * path, uint32_t op)
 
 static void lv_vg_lite_path_append_point(lv_vg_lite_path_t * path, float x, float y)
 {
+    if(path->has_transform) {
+        LV_VG_LITE_ASSERT_MATRIX(&path->matrix);
+        /* transform point */
+        float ori_x = x;
+        float ori_y = y;
+        x = ori_x * path->matrix.m[0][0] + ori_y * path->matrix.m[0][1] + path->matrix.m[0][2];
+        y = ori_x * path->matrix.m[1][0] + ori_y * path->matrix.m[1][1] + path->matrix.m[1][2];
+    }
+
     if(path->base.format == VG_LITE_FP32) {
         lv_vg_lite_path_append_data(path, &x, sizeof(x));
         lv_vg_lite_path_append_data(path, &y, sizeof(y));

src/draw/vg_lite/lv_vg_lite_path.h

@@ -61,6 +61,8 @@ void lv_vg_lite_path_get_bonding_box(lv_vg_lite_path_t * path,
 
 bool lv_vg_lite_path_update_bonding_box(lv_vg_lite_path_t * path);
 
+void lv_vg_lite_path_set_transform(lv_vg_lite_path_t * path, const vg_lite_matrix_t * matrix);
+
 void lv_vg_lite_path_set_quality(lv_vg_lite_path_t * path, vg_lite_quality_t quality);
 
 vg_lite_path_t * lv_vg_lite_path_get_path(lv_vg_lite_path_t * path);

tests/src/test_cases/widgets/test_image.c

@@ -365,7 +365,12 @@ void test_image_ignore_transformation_settings_when_tiled(void)
 
 void test_image_clip_radius(void)
 {
-    lv_obj_t * img = lv_img_create(lv_screen_active());
+    lv_obj_t * par = lv_obj_create(lv_screen_active());
+    lv_obj_set_scrollbar_mode(par, LV_SCROLLBAR_MODE_OFF);
+    lv_obj_set_style_radius(par, 0, 0);
+    lv_obj_center(par);
+
+    lv_obj_t * img = lv_img_create(par);
     lv_image_set_src(img, &test_arc_bg);
     lv_obj_center(img);
 
@@ -374,6 +379,12 @@ void test_image_clip_radius(void)
 
     lv_obj_set_style_radius(img, LV_RADIUS_CIRCLE, 0);
     TEST_ASSERT_EQUAL_SCREENSHOT("widgets/image_clip_radius_circle.png");
+
+    /* parent cliped */
+    lv_obj_set_pos(img, -50, -20);
+    lv_image_set_scale(img, LV_SCALE_NONE * 2);
+    lv_image_set_rotation(img, 450);
+    TEST_ASSERT_EQUAL_SCREENSHOT("widgets/image_clip_radius_circle_scaled_rotated.png");
 }
 
 void test_image_properties(void)