改回以左下角为基准计算坐标，还是不能解决右对齐问题

src/qelmt/dynamictext.rs

@@ -155,17 +155,13 @@ impl From<&DynamicText> for XMLElement {
         // 计算基础位置（不考虑旋转）
         // txt.x和txt.y现在是对齐点坐标，需要根据对齐方式计算出左上角位置
         // 首先根据水平对齐方式计算左边界的x坐标
-        let left_x = match txt.h_alignment {
-            HAlignment::Left => txt.align_x,
-            HAlignment::Center => txt.align_x - txt_width / 2.0,
-            HAlignment::Right => txt.align_x - txt_width,
-        };
+        let left_x = txt.x;
         
         // 根据垂直对齐方式计算顶部的y坐标
         let top_y = match txt.v_alignment {
-            VAlignment::Top => txt.align_y+pt_size * 1.5,
-            VAlignment::Center => txt.align_y+pt_size,
-            VAlignment::Bottom => txt.align_y+pt_size / 2.0,
+            VAlignment::Top => txt.align_y + pt_size / 2.0,
+            VAlignment::Center => txt.align_y - pt_size / 2.0,
+            VAlignment::Bottom => txt.align_y - pt_size + pt_size / 2.0,
         };
 
         println!("左上角位置: x={}, y={}", left_x, top_y);
@@ -181,7 +177,7 @@ impl From<&DynamicText> for XMLElement {
         //     HAlignment::Right => cjk_offset,
         // };
 
-        let base_y = top_y + 0.5 - (7.0 / 5.0 * pt_size + 26.0 / 5.0)+pt_size;
+        let base_y = top_y + 0.5 - (7.0 / 5.0 * pt_size + 26.0 / 5.0) + pt_size;
 
         // 如果有旋转角度，应用旋转变换
         let (x_pos, y_pos) = if txt.rotation != 0.0 {