@ -6,13 +6,11 @@
namespace ImageSharp.Drawing.Processors
{
using System ;
using System.Collections.Generic ;
using System.Linq ;
using System.Numerics ;
using System.Threading.Tasks ;
using ImageSharp.Processing ;
using Pens ;
using Rectangle = ImageSharp . Rectangle ;
/// <summary>
/// Draws a path using the processor pipeline
@ -39,27 +37,18 @@ namespace ImageSharp.Drawing.Processors
}
/// <summary>
/// Gets the options.
/// Gets the graphics options.
/// </summary>
/// <value>
/// The options.
/// </value>
public GraphicsOptions Options { get ; }
/// <summary>
/// Gets the pen.
/// </summary>
/// <value>
/// The pen.
/// </value>
public IPen < TColor > Pen { get ; }
/// <summary>
/// Gets the path.
/// </summary>
/// <value>
/// The path.
/// </value>
public Drawable Path { get ; }
/// <inheritdoc/>
@ -68,7 +57,7 @@ namespace ImageSharp.Drawing.Processors
using ( PixelAccessor < TColor > sourcePixels = source . Lock ( ) )
using ( PenApplicator < TColor > applicator = this . Pen . CreateApplicator ( sourcePixels , this . Path . Bounds ) )
{
var rect = RectangleF . Ceiling ( applicator . RequiredRegion ) ;
Rectangle rect = RectangleF . Ceiling ( applicator . RequiredRegion ) ;
int polyStartY = rect . Y - PaddingFactor ;
int polyEndY = rect . Bottom + PaddingFactor ;
@ -98,49 +87,53 @@ namespace ImageSharp.Drawing.Processors
}
Parallel . For (
minY ,
maxY ,
this . ParallelOptions ,
( int y ) = >
{
int offsetY = y - polyStartY ;
for ( int x = minX ; x < maxX ; x + + )
minY ,
maxY ,
this . ParallelOptions ,
y = >
{
// TODO add find intersections code to skip and scan large regions of this.
int offsetX = x - startX ;
var info = this . Path . GetPointInfo ( offsetX , offsetY ) ;
int offsetY = y - polyStartY ;
var color = applicator . GetColor ( offsetX , offsetY , info ) ;
for ( int x = minX ; x < maxX ; x + + )
{
// TODO add find intersections code to skip and scan large regions of this.
int offsetX = x - startX ;
PointInfo info = this . Path . GetPointInfo ( offsetX , offsetY ) ;
var opacity = this . Opacity ( color . DistanceFromElement ) ;
ColoredPointInfo < TColor > color = applicator . GetColor ( offsetX , offsetY , info ) ;
if ( opacity > Constants . Epsilon )
{
int offsetColorX = x - minX ;
float opacity = this . Opacity ( color . DistanceFromElement ) ;
Vector4 backgroundVector = sourcePixels [ offsetX , offsetY ] . ToVector4 ( ) ;
Vector4 sourceVector = color . Color . ToVector4 ( ) ;
if ( opacity > Constants . Epsilon )
{
Vector4 backgroundVector = sourcePixels [ offsetX , offsetY ] . ToVector4 ( ) ;
Vector4 sourceVector = color . Color . ToVector4 ( ) ;
var finalColor = Vector4BlendTransforms . PremultipliedLerp ( backgroundVector , sourceVector , opacity ) ;
finalColor . W = backgroundVector . W ;
Vector4 finalColor = Vector4BlendTransforms . PremultipliedLerp ( backgroundVector , sourceVector , opacity ) ;
finalColor . W = backgroundVector . W ;
TColor packed = default ( TColor ) ;
packed . PackFromVector4 ( finalColor ) ;
sourcePixels [ offsetX , offsetY ] = packed ;
TColor packed = default ( TColor ) ;
packed . PackFromVector4 ( finalColor ) ;
sourcePixels [ offsetX , offsetY ] = packed ;
}
}
}
} ) ;
} ) ;
}
}
/// <summary>
/// Returns the correct opacity for the given distance.
/// </summary>
/// <param name="distance">Thw distance from the central point.</param>
/// <returns>The <see cref="float"/></returns>
private float Opacity ( float distance )
{
if ( distance < = 0 )
{
return 1 ;
}
else if ( this . Options . Antialias & & distance < AntialiasFactor )
if ( this . Options . Antialias & & distance < AntialiasFactor )
{
return 1 - ( distance / AntialiasFactor ) ;
}
James Jackson-South
9 years ago