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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Canvas Compositing Test</title> |
| <link rel="stylesheet" href="../resources/js-test-style.css"/> |
| <script src="../resources/js-test-pre.js"></script> |
| <script src="../conformance/resources/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| Below are 2 50x50 pixel canvas but using CSS to display them at 100x100 pixels. <br/> |
| They are solid black with a red triangle<br/> |
| They each have a 10px CSS solid black border around them.<br/> |
| Depending on how the browser composites the canvas with the page they will get |
| a white outline<hr/> |
| <div> |
| 2d canvas<br/> |
| <canvas id="example2" width="50" height="50" style="width: 100px; height: 100px; border: 10px solid black;"></canvas> |
| </div> |
| <hr/> |
| 3d canvas<br/> |
| <div> |
| <canvas id="example" width="50" height="50" style="width: 100px; height: 100px; border: 10px solid black;"></canvas> |
| </div> |
| <hr/> |
| img tag<br/> |
| <img src="50x50pixel-black-with-red-triangle.png" style="width: 100px; height: 100px; border: 10px solid black;"/> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vshader" type="x-shader/x-vertex"> |
| attribute vec4 vPosition; |
| void main() |
| { |
| gl_Position = vPosition; |
| } |
| </script> |
| |
| <script id="fshader" type="x-shader/x-fragment"> |
| void main() |
| { |
| gl_FragColor = vec4(1.0,0.0,0.0,1.0); |
| } |
| </script> |
| |
| <script> |
| "use strict"; |
| function init() |
| { |
| var wtu = WebGLTestUtils; |
| var canvas2d = document.getElementById("example2"); |
| var ctx2d = canvas2d.getContext("2d"); |
| ctx2d.fillStyle = "rgba(0, 0, 0, 255)" |
| ctx2d.fillRect(0, 0, 50, 50); |
| ctx2d.fillStyle = "rgba(255, 0, 0, 255)" |
| ctx2d.beginPath(); |
| ctx2d.moveTo(25, 12.5); |
| ctx2d.lineTo(12.5, 37.5); |
| ctx2d.lineTo(37.5, 37.5); |
| ctx2d.lineTo(25, 12.5); |
| ctx2d.fill(); |
| |
| |
| var gl = wtu.create3DContext("example"); |
| var program = wtu.setupProgram(["vshader", "fshader"], ["vPosition"]); |
| |
| var vertexObject = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); |
| gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW); |
| gl.enableVertexAttribArray(0); |
| gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0); |
| |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| gl.drawArrays(gl.TRIANGLES, 0, 3); |
| } |
| |
| init(); |
| var successfullyParsed = true; |
| </script> |
| </body> |
| <script src="../resources/js-test-post.js"></script> |
| </body> |
| </html> |
