'bmp display' convert 24bit bmp to 16bit lcd format
Hi:
I had tested 'bmp display' command with 24bits bmp picture, **video_bmp_display** function always convert 24bits picture to RGB555 format if the lcd is 16bits. But most of all lcd controller is RGB565 format. Should we improve this?
Thanks
Hi Qianfan,
+Anatolij Gustschin
On Mon, 20 Dec 2021 at 18:22, qianfan qianfanguijin@qq.com wrote:
Hi:
I had tested 'bmp display' command with 24bits bmp picture, **video_bmp_display** function always convert 24bits picture to RGB555 format if the lcd is 16bits. But most of all lcd controller is RGB565 format. Should we improve this?
See also:
https://patchwork.ozlabs.org/project/uboot/patch/20211119202408.1815506-16-s...
Regards, Simon
在 2021/12/28 16:52, Simon Glass 写道:
Hi Qianfan,
+Anatolij Gustschin
On Mon, 20 Dec 2021 at 18:22, qianfan qianfanguijin@qq.com wrote:
Hi:
I had tested 'bmp display' command with 24bits bmp picture, **video_bmp_display** function always convert 24bits picture to RGB555 format if the lcd is 16bits. But most of all lcd controller is RGB565 format. Should we improve this?
See also:
https://patchwork.ozlabs.org/project/uboot/patch/20211119202408.1815506-16-s...
Hi, I read this patch and it is resolved this question. But I don't know if it is a good idea that just replace RGB555 to RGB565.
Maybe somedays after this patch merged, someone will complain about video_bmp_display doesn't support RGB555 mode.
Regards, Simon
Hi Qianfan,
On Tue, 28 Dec 2021 at 20:05, qianfan qianfanguijin@qq.com wrote:
在 2021/12/28 16:52, Simon Glass 写道:
Hi Qianfan,
+Anatolij Gustschin
On Mon, 20 Dec 2021 at 18:22, qianfan qianfanguijin@qq.com wrote:
Hi:
I had tested 'bmp display' command with 24bits bmp picture, **video_bmp_display** function always convert 24bits picture to RGB555 format if the lcd is 16bits. But most of all lcd controller is RGB565 format. Should we improve this?
See also:
https://patchwork.ozlabs.org/project/uboot/patch/20211119202408.1815506-16-s...
Hi, I read this patch and it is resolved this question. But I don't know if it is a good idea that just replace RGB555 to RGB565.
Maybe somedays after this patch merged, someone will complain about video_bmp_display doesn't support RGB555 mode.
Maybe, at which point it should really become an option. But you did say that 565 is more common. The existing BPP enum is not really descriptive enough.
Regards, Simon
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Simon Glass