feat : design 单品新增 镜像旋转功能

app/service/design_fast/utils/synthesis_item.py

@@ -151,9 +151,11 @@ def synthesis(data, size, basic_info):
             if layer['image'] is not None:
                 if layer['name'] != "body":
                     test_image = Image.new('RGBA', size, (0, 0, 0, 0))
-                    test_image.paste(layer['image'], (layer['adaptive_position'][1], layer['adaptive_position'][0]), layer['image'])
+                    paste_img, position = transpose_rotate(layer, layer['image'])
+                    test_image.paste(paste_img, position, paste_img)
                     mask_data = np.where(all_mask > 0, 255, 0).astype(np.uint8)
                     mask_alpha = Image.fromarray(mask_data)
+                    mask_alpha.paste(paste_img.getchannel('A'), position, paste_img.getchannel('A'))
                     cropped_image = Image.composite(test_image, Image.new("RGBA", test_image.size, (255, 255, 255, 0)), mask_alpha)
                     base_image.paste(test_image, (0, 0), cropped_image)  # test_image 已经按照坐标贴到最大宽值的图片上 坐着这里坐标为00
                 else:
@@ -232,3 +234,26 @@ def update_base_size_priority(layers):
     for info in layers:
         info['adaptive_position'] = (info['position'][0], info['position'][1] - min_x)
     return layers, (new_width, new_height)
+
+
+def transpose_rotate(layer, image):
+    transpose = layer.get('transpose', False)
+    rotate = layer.get('rotate', 0)
+    paste_x, paste_y = layer['adaptive_position'][1], layer['adaptive_position'][0]
+    if transpose:
+        flip = 0 if transpose == "left_right" else 1
+        image = image.transpose(flip)
+    if rotate:
+        image = image.rotate(rotate, expand=True)
+        # 4. 计算粘贴位置以保持视觉中心一致
+        # 原本 (15, 36) 是 288*288 的左上角，我们计算其中心点
+        target_center_x = 15 + 288 // 2
+        target_center_y = 36 + 288 // 2
+
+        # 获取旋转后图像的新尺寸
+        new_w, new_h = image.size
+
+        # 计算新的左上角坐标，使得旋转后的图像中心依然在原定的中心位置
+        paste_x = target_center_x - new_w // 2
+        paste_y = target_center_y - new_h // 2
+    return image, (paste_x, paste_y)