Is this library could decode png to bmp?

Question

cyang812 opened this issue 7 years ago · 4 comments

I know ok_png_read() can get png info, but how can I get bitmap data and write it to a file?

Answer 1 · 2018-04-10T07:51:34.000Z

I try to use this sentence to write a file, but output is not correct. I mean output file size is correct, but content is not.

fwrite(image->data, sizeof(uint8_t), image->width * image->height * 4, file)

Answer 2 · 2018-04-10T16:23:58.000Z

Is this library could decode png to bmp?

ok-file-formats doesn't have an encoders, so if you want to encode to BMP you'll have to use a different library (or write it yourself).

As far as the code sample goes, it looks like you're creating a RAW file.

What do you mean by "output is not correct"?

Answer 3 · 2018-04-11T01:36:44.000Z

How to check the output RAW file is correct?
I use XnView software to open it, but it doesn't looks like a real image.

Answer 4 · 2018-04-11T02:42:14.000Z

Never mind, I get it.
Thanks a lot.