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osd chinese display

Hello!

platform:DM8168,dvrrdk3.0. carefully study  demo_osd. C file,  reading  ascii_420sp_1078_28. C, ascii_422i_1078_28. C, unicode_cn_420sp_420_30. C and unicode_cn_422i_420_30. C four files can display Numbers and letters and "通道" two chinese characters, but I  want to support more chinese font, according to  the reference docs \ AppNotes DM81xx_DVR_RDK_Software_OSD_Text_Render_Notes documents,  know how to make unicode_cn file, but that is also only limited  Chinese, now the problem is as follows:

1. operate the osd buffer: read bitmap fonts(chinese), then give a corresponding yuv color values, write bufInfo. VirtAddr refers to the buffer, is it  feasible?

Please  guidance! Thank you very much!