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c++imageargbpixel-manipulation

C++ Converting image to integer array

How would I go about converting the pixels in an image (.png file) to an integer array, where each pixel is converted to its ARGB integer equivalent? Not a 2D integer array by the way, a 1D one (where access is through array[row*width+col]).

Thanks.

Solution

  • Once you have read image data to some buffer, ordinary cast should do the trick:

    GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file ("image.png", NULL);
unsigned char *pixels = gdk_pixbuf_get_pixels (pixbuf);
int *array = reinterpret_cast<int*>(pixels);

    Example uses GdkPixbuf library, but other libraries should be similar.