| public AddColorStop ( double offset, Color c ) : Status | ||
| offset | double | |
| c | Color | |
| return | Status | |
static void GetShadowPattern(Cairo.Gradient shadow, ShadowParameters shadowParams)
{
double denLog = Math.Log(1.0f / shadowParams.shadowRadius);
shadow.AddColorStop(0.0, new Cairo.Color(0, 0, 0, shadowParams.shadowAlpha));
for (int i = 2; i <= shadowParams.shadowRadius; i++)
{
double step = i / shadowParams.shadowRadius;
shadow.AddColorStop(step, new Cairo.Color(0, 0, 0, shadowParams.shadowAlpha * (Math.Log(step) / denLog)));
}
}
static void ShadowGradient(Cairo.Gradient lg, double strength)
{
lg.AddColorStop(0, new Cairo.Color(0, 0, 0, strength));
lg.AddColorStop(1.0 / 6.0, new Cairo.Color(0, 0, 0, .85 * strength));
lg.AddColorStop(2.0 / 6.0, new Cairo.Color(0, 0, 0, .54 * strength));
lg.AddColorStop(3.0 / 6.0, new Cairo.Color(0, 0, 0, .24 * strength));
lg.AddColorStop(4.0 / 6.0, new Cairo.Color(0, 0, 0, .07 * strength));
lg.AddColorStop(5.0 / 6.0, new Cairo.Color(0, 0, 0, .01 * strength));
lg.AddColorStop(1, new Cairo.Color(0, 0, 0, 0));
}