I just posted the GIL code sample files and regression tests. You can get them from http://opensource.adobe.com/gil/download.html The following example files are included: 1. resize.cpp Scales an image using bilinear or nearest-neighbor resampling 2. affine.cpp Performs an arbitrary affine transformation on the image 3. convolution.cpp Convolves the image with a Gaussian kernel 4. mandelbrot.cpp Creates a synthetic image defining the Mandelbrot set 5. interleaved_ptr.cpp Illustrates how to create a custom pixel reference and iterator. Creates a GIL image view over user-supplied data without the need to cast to GIL pixel type 6. x_gradient.cpp Horizontal gradient, from the tutorial 7. histogram.cpp Algorithm to compute the histogram of an image 8. packed_pixel.cpp Illustrates how to create a custom pixel model - a pixel whose channel size is not divisible by bytes 9. dynamic_image.cpp Example of using images whose type is instantiated at run time ____________________ You should also resync to the latest GIL. The change: When you assign a channel to a grayscale pixel you must qualify it with the channel type. For example, the following code will no longer compile: gray8_pixel_t p(5); // error gray8_image_t img(100,100); img[10] = 5; // error You must now do: gray8_pixel_t p(bits8(5)); gray8_image_t img(100,100); img[10] = bits8(5); This affects the x_gradient code in the tutorial/presentation. We updated the tutorial. ____________________ I am away this weekend. I may not have email access until Monday. Lubomir