Convolution Border Mode Conformance Test Proposal
Jack Middleton, Sun (Jack.Middleton@Eng.Sun.COM)

This test checks the operation of convolution border modes. It tests 2D
and separable cases. Each border mode is tested against each operation
that is effected by convolution borders.

/********** 2D test **************/

for each 2D convolution filter {
   for	each border mode {
       /* glDrawPixels test
	     call glClear
	     set convolution filter and border parameters
	     set raster position, call glDrawPixels
	     check the image */

       /* glCopyPixels test
	     call glClear
	     disable convolution
	     draw image
	     enable  convolution, set filter and border parameters
	     call glCopyPixels on image
	     check the new image  */


       /* glReadPixels test
	     call glClear
	     disable convolution
	     draw image
	     enable  convolution, set filter and border parameters
	     call glReadPixels on image
	     check image in memory */

       /* glTexImage2D test
	     call glClear
	     set convolution filter and border parameters
	     call glTexImage2D
	     texture map image onto rectangle
	     check the resulting image */

       /* glTexSubImage2D test
	     call glClear
	     set convolution filter and border parameters
	     call glTexSubImage2D
	     texture map image onto rectangle
	     check the resulting image */


       /* glCopyTexImage2D test
	     call glClear
	     disable convolution
	     draw image
	     enable  convolution, set filter and border parameters
	     call glCopyTexImage2D
	     texture map image onto rectangle
	     check the resulting image */

       /* glCopyTexSubImage2D test
	     call glClear
	     disable convolution
	     draw image
	     enable  convolution, set filter and border parameters
	     call glCopyTexSubImage2D
	     texture map image onto rectangle
	     check the resulting image */
   }
}

/********** separable filter tests  **************/

for each separable filter {
   for each border mode {
      /*  same case as 2D tests above */
   }
}

Conformance Criteria:

    filters:
    3X3 RGBA FLOAT  for 2D
    1X3 RGBA FLOAT's  for separable

    REDUCE test:
	Use a white image and check the edges to ensure that no color is
	present in the border pixels (outer 2 pixels for a 5X5 filter).

    IGNORE_BORDER test:
	Use a white image and check the edges to ensure that the border
	pixels are white.

    CONSTANT_BORDER test:
	Use a image with no color and a border with color and check the
	edges to see if color is present in the border pixels.

    REPLICATE_BORDER test:
	Use a white image and check the edges to see if the border
	pixels are white.