RGB to PNG wrong alignment?

[avafinger]

Hi @lvandeve , thanks for your work.
I am trying to convert the data portion of a windows bitmap to png but it fails when (h % 4 ) > 0.
There seems some alignment issue, I could not figure out.

The environment and compiler are Windows and Visual C, 32 bit.
Perhaps I should force some alignment during compilation, can you suggest a possible fix or where I should look for in order to fix this?

Attached are the results of a successful conversion (264x264) and a failed one (198x198).

• Works:
  
  original file:test_264x264.bmp.zip
  converted file: test_264x264.png.zip

• Error:
  
  original file: test_198x198.bmp.zip
  converted file: test_198x198.png.zip

[avafinger]

FYI, the bmp header info is not filled up completely, you must assume the size, but there is something wrong with the padding.

[avafinger]

Tested on Linux x64, same problem.
So, lodepng_encode24_file(szbuf, data, bmInfoHeader->biWidth, bmInfoHeader->biHeight); does not consider padding.

[avafinger]

passing data without the padding worked.