static void
SampleValue(float aPortion, Animation& aAnimation, StyleAnimationValue& aStart,
StyleAnimationValue& aEnd, Animatable* aValue)
{
StyleAnimationValue interpolatedValue;
NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() ||
aStart.GetUnit() == StyleAnimationValue::eUnit_None ||
aEnd.GetUnit() == StyleAnimationValue::eUnit_None,
"Must have same unit");
StyleAnimationValue::Interpolate(aAnimation.property(), aStart, aEnd,
aPortion, interpolatedValue);
if (aAnimation.property() == eCSSProperty_opacity) {
*aValue = interpolatedValue.GetFloatValue();
return;
}
nsCSSValueSharedList* interpolatedList =
interpolatedValue.GetCSSValueSharedListValue();
TransformData& data = aAnimation.data().get_TransformData();
nsPoint origin = data.origin();
// we expect all our transform data to arrive in css pixels, so here we must
// adjust to dev pixels.
double cssPerDev = double(nsDeviceContext::AppUnitsPerCSSPixel())
/ double(data.appUnitsPerDevPixel());
gfxPoint3D transformOrigin = data.transformOrigin();
transformOrigin.x = transformOrigin.x * cssPerDev;
transformOrigin.y = transformOrigin.y * cssPerDev;
gfxPoint3D perspectiveOrigin = data.perspectiveOrigin();
perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev;
perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev;
nsDisplayTransform::FrameTransformProperties props(interpolatedList,
transformOrigin,
perspectiveOrigin,
data.perspective());
gfx3DMatrix transform =
nsDisplayTransform::GetResultingTransformMatrix(props, origin,
data.appUnitsPerDevPixel(),
&data.bounds());
gfxPoint3D scaledOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(origin.x, data.appUnitsPerDevPixel())),
NS_round(NSAppUnitsToFloatPixels(origin.y, data.appUnitsPerDevPixel())),
0.0f);
transform.Translate(scaledOrigin);
InfallibleTArray<TransformFunction> functions;
functions.AppendElement(TransformMatrix(ToMatrix4x4(transform)));
*aValue = functions;
}
static void
InvertSign(StyleAnimationValue& aValue)
{
switch (aValue.GetUnit()) {
case StyleAnimationValue::eUnit_Coord:
aValue.SetCoordValue(-aValue.GetCoordValue());
break;
case StyleAnimationValue::eUnit_Percent:
aValue.SetPercentValue(-aValue.GetPercentValue());
break;
case StyleAnimationValue::eUnit_Float:
aValue.SetFloatValue(-aValue.GetFloatValue());
break;
default:
NS_NOTREACHED("Calling InvertSign with an unsupported unit");
break;
}
}