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<!DOCTYPE HTML>
<html>
<head>
<meta charset='utf-8'/>
<script src='/tests/SimpleTest/SimpleTest.js'></script>
<link rel='stylesheet' href='/tests/SimpleTest/test.css'>
<script src='ensure-ext.js'></script>
</head>
<body>
<script id='g_vs' type='text/plain'>
void main() {
gl_PointSize = 1.0;
}
</script>
<script id='g_fs' type='text/plain'>
void main() {
gl_FragColor = vec4(0);
}
</script>
<script>
'use strict';
let gl = null;
function CheckTexFloatRenderable(rgbaInternal, type) {
const tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, rgbaInternal, 1, 1, 0, gl.RGBA, type, null);
const fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
return gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE;
}
function CheckRbFloatRenderable(format) {
const rb = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
gl.renderbufferStorage(gl.RENDERBUFFER, format, 1, 1);
const fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
return gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE;
}
function CheckBlending() {
function CompileShader(type, elem) {
const text = elem.innerHTML.trim();
const s = gl.createShader(type);
gl.shaderSource(s, text);
gl.compileShader(s);
return s;
}
const vs = CompileShader(gl.VERTEX_SHADER, g_vs);
const fs = CompileShader(gl.FRAGMENT_SHADER, g_fs);
const p = gl.createProgram();
gl.attachShader(p, vs);
gl.attachShader(p, fs);
gl.linkProgram(p);
gl.useProgram(p);
gl.drawArrays(gl.POINTS, 0, 1);
if (gl.getError()) throw new Error('Unexpected GL error,');
gl.enable(gl.BLEND);
gl.drawArrays(gl.POINTS, 0, 1);
return gl.getError() == 0;
}
function ResetGl(type) {
if (gl) {
const ext = gl.getExtension('WEBGL_lose_context');
ext.loseContext();
gl = null;
}
const c = document.createElement('canvas');
gl = c.getContext(type);
return !!gl;
}
function HasExt(name) {
return gl.getSupportedExtensions().indexOf(name) != -1;
}
ResetGl('webgl');
if (HasExt('EXT_color_buffer_half_float')) {
const ext = gl.getExtension('OES_texture_half_float');
const implicitEnabled = CheckTexFloatRenderable(gl.RGBA, ext.HALF_FLOAT_OES);
ok(implicitEnabled, 'OES_texture_half_float should implicitly enable EXT_color_buffer_half_float.');
}
ResetGl('webgl');
if (HasExt('WEBGL_color_buffer_float')) {
const ext = gl.getExtension('OES_texture_float');
const implicitEnabled = CheckTexFloatRenderable(gl.RGBA, gl.FLOAT);
ok(implicitEnabled, 'OES_texture_float should implicitly enable WEBGL_color_buffer_float.');
if (HasExt('EXT_float_blend')) {
ok(CheckBlending(), 'OES_texture_float should implicitly enable EXT_float_blend.');
}
}
ResetGl('webgl');
if (HasExt('EXT_float_blend')) {
const ext = gl.getExtension('WEBGL_color_buffer_float');
CheckRbFloatRenderable(ext.RGBA32F_EXT);
const implicitEnabled = CheckBlending();
ok(implicitEnabled, 'WEBGL_color_buffer_float should implicitly enable EXT_float_blend.');
}
if (ResetGl('webgl2')) {
if (HasExt('EXT_float_blend')) {
const ext = gl.getExtension('EXT_color_buffer_float');
CheckTexFloatRenderable(gl.RGBA32F, gl.FLOAT);
const implicitEnabled = CheckBlending();
ok(implicitEnabled, 'EXT_color_buffer_float should implicitly enable EXT_float_blend.');
}
}
</script>
</body>
</html>
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