93 lines
3.0 KiB
HTML
93 lines
3.0 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<title>Rendering Test</title>
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<script src="../../../resources/js-test.js"></script>
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<script src="resources/webgl-test.js"> </script>
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</head>
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<body>
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<canvas id="example" width="50" height="50">
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There is supposed to be an example drawing here, but it's not important.
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</canvas>
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<div id="description"></div>
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<div id="console"></div>
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<script id="vshader" type="x-shader/x-vertex">
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attribute vec4 vPosition;
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void main()
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{
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gl_Position = vPosition;
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}
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</script>
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<script id="fshader" type="x-shader/x-fragment">
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void main()
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{
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gl_FragColor = vec4(1.0,0.0,0.0,1.0);
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}
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</script>
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<script>
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function fail(x,y, buf, shouldBe)
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{
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var i = (y*50+x) * 4;
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var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
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testFailed(reason);
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}
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function pass()
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{
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testPassed("drawing is correct");
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}
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function init()
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{
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if (window.initNonKhronosFramework) {
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window.initNonKhronosFramework(false);
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}
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gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);
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var vertexObject = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
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gl.enableVertexAttribArray(0);
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gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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gl.drawArrays(gl.TRIANGLES, 0, 3);
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var buf = new Uint8Array(50 * 50 * 4);
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gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
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// Test several locations
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// First line should be all black
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for (var i = 0; i < 50; ++i)
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if (buf[i*4] != 0 || buf[i*4+1] != 0 || buf[i*4+2] != 0 || buf[i*4+3] != 255) {
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fail(i, 0, buf, "(0,0,0,255)");
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return;
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}
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// Line 15 should be red for at least 10 red pixels starting 20 pixels in
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var offset = (15*50+20) * 4;
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for (var i = 0; i < 10; ++i)
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if (buf[offset+i*4] != 255 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
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fail(20 + i, 15, buf, "(255,0,0,255)");
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return;
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}
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// Last line should be all black
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offset = (49*50) * 4;
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for (var i = 0; i < 50; ++i)
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if (buf[offset+i*4] != 0 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
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fail(i, 49, buf, "(0,0,0,255)");
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return;
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}
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pass();
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}
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init();
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</script>
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</body>
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</html>
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