The Bitmap file image style was introduced.

介绍了位图图像文件的基本格式。

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This is not a valid bitmap file, or its format is not currently supported.

无效的位图文件，或者当前尚不支持这种文件格式。

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And specify the bitmap file path and the color on it to be made transparent.

并指定位图文件路径和它的颜色是透明的。

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