| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <title>Canvas test: 2d.transformation.combined.3d.transforms</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/html/canvas/resources/canvas-tests.js"></script> |
| <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css"> |
| <body class="show_output"> |
| |
| <h1>2d.transformation.combined.3d.transforms</h1> |
| <p class="desc">perspective and rotate3d work together</p> |
| |
| |
| <p class="output">Actual output:</p> |
| <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> |
| <p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt=""> |
| <ul id="d"></ul> |
| <script> |
| var t = async_test("perspective and rotate3d work together"); |
| _addTest(function(canvas, ctx) { |
| |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, 100, 50); |
| |
| // Create a perspective transform in combiation with fillRect to draw a red |
| // trapezoid then draw a smaller green trapezoid inside it. |
| ctx.translate(50, 5); |
| ctx.perspective(100); |
| ctx.rotate3d(Math.PI/4, 0, 0); |
| ctx.fillStyle = "#f00"; |
| ctx.fillRect(-30, 0, 60, 40); |
| ctx.fillStyle = "#0f0"; |
| ctx.fillRect(-15, 10, 30, 20); |
| |
| // These are the expected points of those two trapezoids from putting |
| // the corners of the filled rectangles through the perspective transform. |
| const bigTrapezoid = [[81, 5], [93, 45], [7, 45], [19, 5]]; |
| const smallTrapezoid = [[32, 31], [68, 31], [65, 13], [35, 13]]; |
| |
| // Now filling a shape with green at those exact points with an identity |
| // transform should result in a purely green image. |
| ctx.resetTransform(); |
| ctx.beginPath(); |
| ctx.moveTo(bigTrapezoid[3][0], bigTrapezoid[3][1]); |
| for (const point of bigTrapezoid) ctx.lineTo(point[0], point[1]) |
| ctx.lineTo(smallTrapezoid[3][0], smallTrapezoid[3][1]); |
| for (const point of smallTrapezoid) ctx.lineTo(point[0], point[1]) |
| ctx.fill(); |
| _assertPixel(canvas, 21,11, 0,255,0,255, "21,11", "0,255,0,255"); |
| _assertPixel(canvas, 79,11, 0,255,0,255, "79,11", "0,255,0,255"); |
| _assertPixel(canvas, 21,39, 0,255,0,255, "21,39", "0,255,0,255"); |
| _assertPixel(canvas, 79,39, 0,255,0,255, "79,39", "0,255,0,255"); |
| _assertPixel(canvas, 39,19, 0,255,0,255, "39,19", "0,255,0,255"); |
| _assertPixel(canvas, 61,19, 0,255,0,255, "61,19", "0,255,0,255"); |
| _assertPixel(canvas, 39,31, 0,255,0,255, "39,31", "0,255,0,255"); |
| _assertPixel(canvas, 61,31, 0,255,0,255, "61,31", "0,255,0,255"); |
| |
| |
| }); |
| </script> |
| |
