public void TextUtilsShadowParametersConstructor()
{
tlog.Debug(tag, $"TextUtilsShadowParametersConstructor START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersConstructor END (OK)");
}
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)));
}
}
public void TextUtilsShadowParametersOffset()
{
tlog.Debug(tag, $"TextUtilsShadowParametersOffset START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.Offset = new Vector2(0.3f, 0.8f);
Assert.AreEqual(0.3f, testingTarget.Offset.X, "Should be equal!");
Assert.AreEqual(0.8f, testingTarget.Offset.Y, "Should be equal!");
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersOffset END (OK)");
}
public void TextUtilsShadowParametersInput()
{
tlog.Debug(tag, $"TextUtilsShadowParametersInput START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.Input = new PixelBuffer(30, 50, PixelFormat.A8);
Assert.AreEqual(30, testingTarget.Input.GetWidth(), "Should be equal!");
Assert.AreEqual(50, testingTarget.Input.GetHeight(), "Should be equal!");
Assert.AreEqual(PixelFormat.A8, testingTarget.Input.GetPixelFormat(), "Should be equal!");
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersInput END (OK)");
}
public void TextUtilsShadowParametersTextColor()
{
tlog.Debug(tag, $"TextUtilsShadowParametersTextColor START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.TextColor = new Vector4(0.3f, 0.8f, 1.0f, 0.0f);
Assert.AreEqual(0.3f, testingTarget.TextColor.R, "Should be equal!");
Assert.AreEqual(0.8f, testingTarget.TextColor.G, "Should be equal!");
Assert.AreEqual(1.0f, testingTarget.TextColor.B, "Should be equal!");
Assert.AreEqual(0.0f, testingTarget.TextColor.A, "Should be equal!");
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersTextColor END (OK)");
}
public void TextUtilsCreateShadow()
{
tlog.Debug(tag, $"TextUtilsCreateShadow START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.Input = new PixelBuffer(30, 50, PixelFormat.A8);
testingTarget.blendShadow = true;
var result = TextUtils.CreateShadow(testingTarget);
Assert.IsNotNull(result, "Can't create success object PixelBuffer");
Assert.IsInstanceOf <PixelBuffer>(result, "Should be an instance of PixelBuffer type.");
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsCreateShadow END (OK)");
}
public void TextUtilsShadowParametersColor()
{
tlog.Debug(tag, $"TextUtilsShadowParametersColor START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.Input = new PixelBuffer(30, 50, PixelFormat.A8);
testingTarget.Color = new Vector4(0.3f, 0.8f, 1.0f, 0.0f);
var color = new Vector4(0.3f, 0.8f, 1.0f, 0.0f);
Assert.AreEqual(true, CheckColor(color, testingTarget.Color), "Should be true!");
color.Dispose();
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersColor END (OK)");
}
public void TextUtilsShadowParametersblendShadow()
{
tlog.Debug(tag, $"TextUtilsShadowParametersblendShadow START");
var testingTarget = new ShadowParameters();
Assert.IsNotNull(testingTarget, "Can't create success object ShadowParameters");
Assert.IsInstanceOf <ShadowParameters>(testingTarget, "Should be an instance of ShadowParameters type.");
testingTarget.blendShadow = true;
try
{
var result = testingTarget.blendShadow;
}
catch (Exception e)
{
tlog.Debug(tag, e.Message.ToString());
Assert.Fail("Caught Exception: Failed!");
}
testingTarget.Dispose();
tlog.Debug(tag, $"TextUtilsShadowParametersblendShadow END (OK)");
}
public static void DrawShadow(Cairo.Context cr, double x, double y, double width,
double height, double radius, ShadowParameters shadowParams)
{
using (Surface sr = cr.CreateSimilarToTarget((int)width + (int)(2 * shadowParams.shadowRadius) + (int)x,
(int)height + (int)(2 * shadowParams.shadowRadius) + (int)y))
{
using (Context cairo = new Context(sr))
{
radius++;
y++;
height--;
Cairo.Gradient shadow;
/* Top Left */
using (shadow = new Cairo.RadialGradient(x + radius, y + radius, radius,
x + radius, y + radius, radius + shadowParams.shadowRadius))
{
cairo.Rectangle(x - shadowParams.shadowRadius, y - shadowParams.shadowRadius,
radius + shadowParams.shadowRadius, radius + shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Top */
using (shadow = new Cairo.LinearGradient(0.0, y, 0.0, y - shadowParams.shadowRadius))
{
cairo.Rectangle(x + radius, y - shadowParams.shadowRadius,
width - radius * 2, shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Top Right */
using (shadow = new Cairo.RadialGradient(width + x - radius, y + radius, radius,
width + x - radius, y + radius, radius + shadowParams.shadowRadius))
{
cairo.Rectangle(width + x - radius, y - shadowParams.shadowRadius,
radius + shadowParams.shadowRadius, radius + shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Right */
using (shadow = new Cairo.LinearGradient(width + x, 0.0,
width + x + shadowParams.shadowRadius, 0.0))
{
cairo.Rectangle(width + x, y + radius, shadowParams.shadowRadius, height - radius * 2);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Bottom Right */
using (shadow = new Cairo.RadialGradient(width + x - radius, height + y - radius, radius,
width + x - radius, height + y - radius, radius + shadowParams.shadowRadius))
{
cairo.Rectangle(width + x - radius, height + y - radius,
radius + shadowParams.shadowRadius, radius + shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Bottom */
using (shadow = new Cairo.LinearGradient(0.0, height + y,
0.0, height + y + shadowParams.shadowRadius))
{
cairo.Rectangle(x + radius, height + y,
width - radius * 2, shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Bottom Left */
using (shadow = new Cairo.RadialGradient(x + radius, height + y - radius, radius,
x + radius, height + y - radius, radius + shadowParams.shadowRadius))
{
cairo.Rectangle(x - shadowParams.shadowRadius, height + y - radius,
radius + shadowParams.shadowRadius, radius + shadowParams.shadowRadius);
FillShadowPattern(cairo, shadow, shadowParams);
}
/* Left */
using (shadow = new Cairo.LinearGradient(x, 0.0,
x - shadowParams.shadowRadius, 0.0))
{
cairo.Rectangle(x - shadowParams.shadowRadius, y + radius,
radius + shadowParams.shadowRadius, height - radius * 2);
FillShadowPattern(cairo, shadow, shadowParams);
}
y--;
height++;
/* Clear inner rectangle */
GetFrame(cairo, x, y, width, height, radius);
cairo.Operator = Cairo.Operator.Clear;
cairo.Fill();
cr.SetSource(sr);
cr.Paint();
}
}
}
static void FillShadowPattern(Cairo.Context cairo, Cairo.Gradient shadow, ShadowParameters shadowParams)
{
GetShadowPattern(shadow, shadowParams);
cairo.SetSource(shadow);
cairo.Fill();
}
