PNGwriter is a C++ library for creating PNG images.
Edit By BS Editor: PNGwriter is a C++ library for creating PNG images.

PNGwriter enables you to do the following with an image:
Plot
Get the colour of a pixel
Open an already-existing PNG file.
Plot in the HSV and CMYK colour spaces.
Get the colour of a pixel in the HSV and CMYK colour spaces.
Plot lines, filled or hollow circles and rectangles, Opaque and translucent.
Plot text, using any TrueType font.
Adjust the images gamma.
Choose the level of compression.
Change the file name.
Scale the image.
Get the height, width and bit depth of an image.
and much more!. you can free download PNGwriter 0.5.4 now.