[png-mng-implement] =?gb2312?B?tPC4tDogW3BuZy1tbmctaW1wbGVtZW50XSBxdWVzdGlvbiBhYm91dA==?= =?gb2312?B?IHJlYWQgcG5nIGZpbGU=?=

[yinhua <hy...@cd...>]

> Note that the idea here was to allow either RGB or RGBA at the end.  If
you
> always want RGBA (even if the alpha channel is blank), I think you call
> png_set_filler() or something like that.
Yes, in my application, it is always RGBA, and the alpha channel is a blank
transparency block in the image, I find some sample use png_set_filler()
with a colorkey, but I don't know how to treat transparency.

> Note that I haven't tested this with png_set_bgr(), but my impression is
that 
> that works fine, too (i.e., => ABGR output).  You'll still need to split
the
> alpha and BGR data into separate buffers yourself, if that's what you want
Is there any kind of this sample for this?
Sorry I'm a new guy for libpng, would you please give more help to solve
this problem?

Thanks a lot
Frank