Max width PNG

[peterkroon]

Hi,
Just compiled the code and it works smooth.
However, it looks like the maximum width of the PNG is 32000px.
Could this be raised?
Best,
Peter

[peterkroon]

http://www.libpng.org/pub/png/libpng-manual.txt
This documents mentions:

User limits

The PNG specification allows the width and height of an image to be as
large as 2^31-1 (0x7fffffff), or about 2.147 billion rows and columns.
Since very few applications really need to process such large images,
we have imposed an arbitrary 1-million limit on rows and columns.
Larger images will be rejected immediately with a png_error() call. If
you wish to change this limit, you can use

   png_set_user_limits(png_ptr, width_max, height_max);

to set your own limits, or use width_max = height_max = 0x7fffffffL
to allow all valid dimensions (libpng may reject some very large images
anyway because of potential buffer overflow conditions).

I'll play with this some myself as well.

[peterkroon]

I've managed to to put the extra code in.
The width is indeed 40000px but the waveform is drawn till 32000px and fails to open in my image viewer.

Used code:

//added line below where the static's are set
static png_structp png_ptr;
//and added the line below in the init
png_set_user_limits(png_ptr, width_max, height_max)

[peterkroon]

Looks like it's got nothing to do with the PNG lib but with the code in main.c
I've reverted my changes.