[Openexr-devel] OpenEXR from shared libs.

[Nikolaj Thygesen]

Hi list,

   I'm currently trying to interface to the OpenEXR library from my own 
shared library reading scanlines one at a time. My code is heavily based 
on the sample code on the OpenEXR home page describing the reading of an 
RGBA file using the RgbaInputFile class + a raw copy-paste of the 
C_IStream class using the old-skool stdio FILE *'s to access the bytes 
of files. When compiling my program as a stand-alone program, everything 
works fine for all sample *.exr files, but as soon as the code goes into 
a *.so, reading crashes in the "input_file.readPixels(dw.min.y);" call 
of the snippet below.

   I should mention that I'm running FreeBSD 6.2, using gcc 4.1and 
OpenEXR V1.2.2, which is the release currently available in the ports 
tree. My question is: Does OpenEXR have any issues with shared libs?? Do 
I need or should I avoid any certain compiler/linker flags??

           RgbaInputFile input_file;

           Box2i dw = input_file.dataWindow();
           Rgba pixels[width];
           input_file.setFrameBuffer(pixels - dw.min.x - dw.min.y * 
width, 1, width);
           input_file.readPixels(dw.min.y);
           dw.min.y++;
           lineno = line_number++;



   br - Nikolaj Thygesen