update graphic driver interface.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1465 bbd45198-f89e-11dd-88c7-29a3b14d5316
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@ -721,7 +721,7 @@ struct rt_device_graphic_ops
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void (*blit_line) (const char* pixel, int x, int y, rt_size_t size);
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};
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#define rt_graphix_ops(device) (struct rt_device_graphic_ops*)(device->user_data)
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#define rt_graphix_ops(device) ((struct rt_device_graphic_ops*)(device->user_data))
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/*@}*/
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/**
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