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diff --git a/layout/reftests/svg/smil/anim-feTurbulence-numOctaves-01.svg b/layout/reftests/svg/smil/anim-feTurbulence-numOctaves-01.svg new file mode 100644 index 0000000000..e48a6bd55e --- /dev/null +++ b/layout/reftests/svg/smil/anim-feTurbulence-numOctaves-01.svg @@ -0,0 +1,217 @@ +<svg xmlns="http://www.w3.org/2000/svg" + xmlns:xlink="http://www.w3.org/1999/xlink" + class="reftest-wait" + onload="setTimeAndSnapshot(5, true)"> + <title>Test animation of the "numOctaves" <integer> attribute on the "feTurbulence" element</title> + <script xlink:href="smil-util.js" type="text/javascript"/> + + + <!-- Our implementation strategy for animating integers with + calcMode="linear" is to use round(), with the slight twist that we + round "to the NEXT value" when the current time puts us exactly midway + between two integer values. (This is so that the result of midpoint + rounding does not depend on whether we're animating up to a higher + value or animating down to a lower value.) Note that one of the quirks + of using round() is that the start and end values of any integer + range only receive half as much time as any intermediary values. This + is as you would expect mathematically, but it's probably unexpected + for most users! + + We could try to avoid this round() quirk by coming up with a better + implementation strategy for calcMode="linear", but animation of the + few integer attributes in SVG 1.1 is extremely unlikely (so this + issue is very low priority), and it's actually difficult to find a + better strategy that doesn't have its own undesirable quirks. + + One alternative could be to divide the time evenly amoungst each + integer. (I.e. it would be similar to calcMode="discrete", except it + would also visit all the intermediary values, not just the start and + end values). The issue with this approach is that for a simple "to" + animation the animation wouldn't actually seem to change anything until + interpolation reaches the second integer value. This could be avoided + by skipping the initial value and distributing the time between the + other values, but then in the case of a "from-to" animation where the + from value is different to the underlying attribute value, the + animation would seem to skip the first value. Not that the same sort of + problem exists at the other end of the simple duration, where it will + reach the final integer value before the end of the simple duration. + This could be avoided by only setting the final value right at the end + of the simple duration and distributing the time between evenly + between the other values, but then the final value will only be seen if + fill="freeze". + + There are many other problems with other implementation strategies. The + more you think about them, add the complexity of 'values', 'by' etc, + and think of cases where they behave strangely (e.g. animating between + just two adjacent integers, up or down, etc.), the more ugly it gets. + It's really not worth it for SVG 1.1. Maybe if you could use SMIL for + 'font-size' or something even more likely to be animated it would be. + --> + + + <!-- Some calcMode="linear" tests animating *up* to higher values. --> + + <!-- At 5s the animated value should be 3. --> + <filter id="filter_1" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6.1s" + to="4" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="0" width="20" height="20" filter="url(#filter_1)"/> + + <!-- At exactly 5s the animated value should change to 4. --> + <filter id="filter_2" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6s" + to="4" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" width="20" height="20" filter="url(#filter_2)"/> + + + <!-- Some calcMode="linear" tests animating *down* to lower values. --> + + <!-- At 5s the animated value should be 2. --> + <filter id="filter_3" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6.1s" + to="1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="0" y="20" width="20" height="20" filter="url(#filter_3)"/> + + <!-- At exactly 5s the animated value should change to 1. --> + <filter id="filter_4" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6s" + to="1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" y="20" width="20" height="20" filter="url(#filter_4)"/> + + + <!-- Some 'by' animation tests --> + + <!-- At 5s the animated value should be 3. --> + <filter id="filter_5" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6.1s" + by="3" + fill="freeze"/> + </feTurbulence> + </filter> + <rect y="40" width="20" height="20" filter="url(#filter_5)"/> + + <!-- At exactly 5s the animated value should change to 4. --> + <filter id="filter_6" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="linear" + begin="0s" dur="6s" + by="3" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" y="40" width="20" height="20" filter="url(#filter_6)"/> + + + <!-- calcMode="paced" tests --> + + <!-- At 5s the animated value should be 2. --> + <filter id="filter_7" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="paced" + begin="0s" dur="6.1s" + values="4; 3; 1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect y="60" width="20" height="20" filter="url(#filter_7)"/> + + <!-- At exactly 5s the animated value should change to 1. --> + <filter id="filter_8" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="paced" + begin="0s" dur="6s" + values="4; 3; 1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" y="60" width="20" height="20" filter="url(#filter_8)"/> + + + <!-- Some calcMode="discrete" tests animating *up* to higher values. --> + + <!-- At 5s the animated value should be 1. --> + <filter id="filter_9" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="discrete" + begin="0s" dur="10.1s" + from="1" + to="4" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="0" y="80" width="20" height="20" filter="url(#filter_9)"/> + + <!-- At exactly 5s the animated value should change to 4. --> + <filter id="filter_10" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="1"> + <animate attributeName="numOctaves" + calcMode="discrete" + begin="0s" dur="10s" + from="1" + to="4" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" y="80" width="20" height="20" filter="url(#filter_10)"/> + + + <!-- Some calcMode="discrete" tests animating *down* to lower values. --> + + <!-- At 5s the animated value should be 4. --> + <filter id="filter_11" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="discrete" + begin="0s" dur="10.1s" + from="4" + to="1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="0" y="100" width="20" height="20" filter="url(#filter_11)"/> + + <!-- At exactly 5s the animated value should change to 1. --> + <filter id="filter_12" x="0%" y="0%" width="100%" height="100%"> + <feTurbulence type="turbulence" baseFrequency="0.01" numOctaves="4"> + <animate attributeName="numOctaves" + calcMode="discrete" + begin="0s" dur="10s" + from="4" + to="1" + fill="freeze"/> + </feTurbulence> + </filter> + <rect x="20" y="100" width="20" height="20" filter="url(#filter_12)"/> + +</svg> |