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EtheaDev / SVGIconImageList

Three engines to render SVG (Delphi Image32, Skia4Delphi, Direct2D wrapper) and four components to simplify use of SVG images (resize, fixedcolor, grayscale...)
Apache License 2.0
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Incorrect painting of elliptic arcs #134

Closed pyscripter closed 3 years ago

pyscripter commented 3 years ago

Try this one:

<svg width="320" height="320" xmlns="http://www.w3.org/2000/svg">
  <path d="M 10 315
           L 110 215
           A 30 50 0 0 1 162.55 162.45
           L 172.55 152.45
           L 315 10" stroke="black" fill="green" stroke-width="2" fill-opacity="0.5"/>    
</svg>

Solution

In TSVGPathEllipticArc.AddToPath

Change step 4 to:

  //
  // Step 4 : Compute the angleStart (angle1) and the angleExtent (dangle)
  //
  ux := (x1 - CX1) {/ LRX};
  uy := (y1 - CY1) {/ LRY};
  vx := (-x1 - CX1) {/ LRX};
  vy := (-y1 - CY1) {/ LRY};
carloBarazzetta commented 3 years ago

Ok, pushed.