gtk2/tests/reftests/linear-gradient.css

@import url("reset-to-defaults.css");

/* One caveat that apply to cairo gradients, and make things therefor
 * untestable:
 *   The start and end points must be identical when drawing
 * This means that you cannot:
 * ... add extra color stops, even if they'd be invisible
 * ... mirror the gradient (ie 'to left, red, green' vs 'to right, green, red')
 * ... test a repeating gradient against a non repeating one
 * and probably a bunch of other things.
 * These things can cause off-by-one rounding errors in pixman (and probably
 * your GPU, too) and that'd trigger test failures.
 */
#a {
  background-image: linear-gradient(to bottom, blue 0%, green 15px, red 100%);
}

#reference #a {
  background-image: linear-gradient(blue, green, red);
}

#b {
  background-image: linear-gradient(to left, pink 0, cyan, red 0, green 50%, blue 40px, violet -10em);
}

#reference #b {
  background-image: linear-gradient(270deg, red, green, blue);
}

#c {
  background-image: linear-gradient(3.5turn, red, green 10px, red 20px, green 30px, red 40px);
}

#reference #c {
  background-image: repeating-linear-gradient(to bottom, red, green 10px, red 20px, green 30px, red 40px);
}

#d {
    background-image: repeating-linear-gradient(180deg, red, green 10px, red 20px);
}

#reference #d {
    background-image: repeating-linear-gradient(to bottom, red, green 10px, red 20px);
}