third_party/WebKit/LayoutTests/fast/canvas/canvas_arc_largeangles.html

   1 <!DOCTYPE html>
   2 <html>
   3   <body>
   4         <a id="result"></a>
   5            <script>
   6             if (window.testRunner)
   7               testRunner.dumpAsText();
   8
   9                 canvas = document.createElement("canvas");
  10                 document.body.appendChild(canvas);
  11                 canvas.width = 100;
  12                 canvas.height = 100;
  13                 ctx = canvas.getContext("2d");
  14                 ctx.moveTo(25,25);
  15                 ctx.arc(25, 25, 25, Math.PI, 500*Math.PI, false);
  16                 ctx.closePath();
  17
  18                 ctx.moveTo(75, 75);
  19                 ctx.arc(75, 75, 25, 500*Math.PI, Math.PI, true);
  20                 ctx.fillStyle = '#0f0';
  21                 ctx.fill();
  22
  23                 var result = document.getElementById("result");
  24                 var passed = true;
  25
  26                 checkPixel(25, 25, 0, 255, 0, 255);
  27                 checkPixel(75, 75, 0, 255, 0, 255);
  28                 if (passed) result.innerHTML = "PASSED";
  29
  30                 function checkPixel(x, y, r, g, b, a) {
  31                         var data = ctx.getImageData(x,y,1,1).data;
  32                         var red = data[0];
  33                         var green = data[1];
  34                         var blue = data[2];
  35                         var alpha = data[3];
  36
  37                         if (red != r) {
  38                                 result.innerHTML += "Red should be "+r+", but was "+red+". ";
  39                                 passed = false;
  40                         }
  41                         if (green != g) {
  42                                 result.innerHTML += "green should be "+g+", but was "+green+". ";
  43                                 passed = false;
  44                         }
  45                         if (blue != b) {
  46                                 result.innerHTML += "blue should be "+b+", but was "+blue+". ";
  47                                 passed = false;
  48                         }
  49                         if (alpha != a) {
  50                                 result.innerHTML += "alpha should be "+a+", but was "+alpha+". ";
  51                                 passed = false;
  52                         }
  53                 }
  54
  55     </script>
  56   </body>
  57 </html>
  58