fix(matrix): fix matrix transformation area coordinate error (#8928)

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

tests/src/test_cases/test_display.c

@@ -1,5 +1,6 @@
 #if LV_BUILD_TEST
 #include "../lvgl.h"
+#include "../../lvgl_private.h"
 #include "unity/unity.h"
 
 /*Bypassing resolution check*/
@@ -132,6 +133,45 @@ void test_get_invalidated_drawbuf_size_i1_partial()
     exec_invalidated_drawbuf_size_test(&test_set);
 }
 
+#if LV_DRAW_TRANSFORM_USE_MATRIX
+static void test_matrix_transform_area(lv_display_t * display)
+{
+    lv_area_t ori_area = { 0 };
+    lv_area_set_width(&ori_area, 100);
+    lv_area_set_height(&ori_area, 100);
+
+    lv_matrix_t matrix;
+    lv_matrix_identity(&matrix);
+
+    const int32_t hor_res = lv_display_get_original_horizontal_resolution(display);
+    const int32_t ver_res = lv_display_get_original_vertical_resolution(display);
+
+    switch(lv_display_get_rotation(display)) {
+        case LV_DISPLAY_ROTATION_0:
+            break;
+        case LV_DISPLAY_ROTATION_90:
+            lv_matrix_rotate(&matrix, 270);
+            lv_matrix_translate(&matrix, -ver_res, 0);
+            break;
+        case LV_DISPLAY_ROTATION_180:
+            lv_matrix_rotate(&matrix, 180);
+            lv_matrix_translate(&matrix, -hor_res, -ver_res);
+            break;
+        case LV_DISPLAY_ROTATION_270:
+            lv_matrix_rotate(&matrix, 90);
+            lv_matrix_translate(&matrix, 0, -hor_res);
+            break;
+    }
+
+    lv_area_t disp_area = ori_area;
+    lv_display_rotate_area(display, &disp_area);
+
+    lv_area_t matrix_area = lv_matrix_transform_area(&matrix, &ori_area);
+
+    TEST_ASSERT_TRUE(lv_area_is_equal(&disp_area, &matrix_area));
+}
+#endif
+
 void test_display_matrix_rotation(void)
 {
 #if LV_DRAW_TRANSFORM_USE_MATRIX
@@ -145,23 +185,28 @@ void test_display_matrix_rotation(void)
     TEST_ASSERT_TRUE(lv_display_get_matrix_rotation(disp));
 
     lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_0);
+    test_matrix_transform_area(disp);
     lv_label_set_text(label, "Rotation: 0 degrees");
     TEST_DISPLAY_ASSERT_EQUAL_SCREENSHOT("display_matrix_rotation_0.png");
 
     lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_90);
+    test_matrix_transform_area(disp);
     lv_label_set_text(label, "Rotation: 90 degrees");
     TEST_DISPLAY_ASSERT_EQUAL_SCREENSHOT("display_matrix_rotation_90.png");
 
     lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_180);
+    test_matrix_transform_area(disp);
     lv_label_set_text(label, "Rotation: 180 degrees");
     TEST_DISPLAY_ASSERT_EQUAL_SCREENSHOT("display_matrix_rotation_180.png");
 
     lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_270);
+    test_matrix_transform_area(disp);
     lv_label_set_text(label, "Rotation: 270 degrees");
     TEST_DISPLAY_ASSERT_EQUAL_SCREENSHOT("display_matrix_rotation_270.png");
 
     lv_display_set_matrix_rotation(disp, false);
     lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_0);
+    test_matrix_transform_area(disp);
     lv_label_set_text(label, "Rotation: 0 degrees");
     TEST_DISPLAY_ASSERT_EQUAL_SCREENSHOT("display_matrix_rotation_0.png");
 #else