62 lines
1.5 KiB
HTML
62 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset='utf-8'>
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<title>Bug 1426289 - vertexAttrib4f should actually update.</title>
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<script src='/tests/SimpleTest/SimpleTest.js'></script>
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<link rel='stylesheet' href='/tests/SimpleTest/test.css'>
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<script src='webgl-util.js'></script>
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</head>
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<body>
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<script id='eVertSource' type='none'>
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attribute vec4 aColor;
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varying vec4 vColor;
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void main() {
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gl_PointSize = 64.0;
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gl_Position = vec4(vec3(0.0), 1.0);
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vColor = aColor;
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}
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</script>
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<script id='eFragSource' type='none'>
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precision mediump float;
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varying vec4 vColor;
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void main() {
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gl_FragColor = vColor;
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}
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</script>
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<script>
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const canvas = document.createElement('canvas');
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canvas.width = 1;
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canvas.height = 1;
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const gl = canvas.getContext('webgl');
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const prog = WebGLUtil.linkProgramByIds(gl, eVertSource, eFragSource);
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gl.useProgram(prog);
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function getRgb() {
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const data = new Uint32Array(1);
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gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array(data.buffer));
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return data[0] & 0xffffff;
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}
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gl.clearColor(0.0, 0.0, 0.0, 1.0);
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gl.clear(gl.COLOR_BUFFER_BIT);
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let was = getRgb();
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ok(was == 0x000000, '0x'+was.toString(16));
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gl.disableVertexAttribArray(prog.aColor);
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gl.vertexAttrib4f(prog.aColor, 1, 0, 0, 1);
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gl.drawArrays(gl.POINTS, 0, 1);
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was = getRgb();
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ok(was == 0x0000ff, '0x'+was.toString(16));
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gl.vertexAttrib4f(prog.aColor, 0, 1, 0, 1);
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gl.drawArrays(gl.POINTS, 0, 1);
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was = getRgb();
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ok(was == 0x00ff00, '0x'+was.toString(16));
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</script>
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</body>
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</html>
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