Test that checks the capability of the stop opacity in linear and radial gradients.

There are two tests which contain rectangles with gradients using stop-opacity properties. A cyan color text string "Background" is put behind both of the rectangles to help demonstrate the opacity concept.

From top-down the appearance of objects is as follows.

The first rectangle has a linear gradient fill with a vector starting at top left and going to bottom right. The stop colors are at 20% spacing apart and are in the following order : violet, blue, lime, yellow, orange, black. Also a stop opacity is given to the colors in the following order: 1, 0.2, 0.5, 0, 0.8, 1 Because the gradient vector vector goes from (0,0) to (1,1) in object bounding box space and because the object bounding box has a larger width than height, the gradient vector is skewed off of a pure 45 degree angle. The gradient stripes are also skewed so that they are no longer perpendicular to the gradient vector.

The next rectangle has a radial gradient fill with a multi-color stops from innermost to outermost in the following order: black, yellow, red, blue, white, green. Also a stop opacity is given to the colors in the following order: 1, 0.2, 0.5, 0, 0.8, 1