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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Clear sRGB Color Buffer</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<canvas id="example" width="8" height="8"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var wtu = WebGLTestUtils;
description("This test verifies the functionality of clearing srgb color buffer.");
var gl = wtu.create3DContext("example", undefined, 2);
var tex = gl.createTexture();
var fbo = gl.createFramebuffer();
var size = 8;
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
// Create a srgb color buffer
init();
clear_srgb_color_buffer(0);
clear_srgb_color_buffer(1);
}
function init() {
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.SRGB8_ALPHA8, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
testFailed("Framebuffer incomplete.");
return;
} else {
testPassed("framebuffer complete!");
}
}
function clear_srgb_color_buffer(iter) {
debug("");
debug("Clear sRGB color buffer through glClear or glClearBufferfv");
var color = [0x33, 0x88, 0xbb, 0xff];
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
if (iter == 0) {
gl.clearColor(color[0] / 255, color[1] / 255, color[2] / 255, color[3] / 255);
gl.clear(gl.COLOR_BUFFER_BIT);
} else {
var data = new Float32Array([color[0] / 255, color[1] / 255, color[2] / 255, color[3] / 255]);
gl.clearBufferfv(gl.COLOR, 0, data);
}
var color_ref = wtu.linearToSRGB(color);
var tolerance = 3;
var msg = "";
wtu.checkCanvasRect(gl, 0, 0, size, size, color_ref, msg, tolerance);
}
gl.bindTexture(gl.TEXTURE_2D, null);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.deleteTexture(tex);
gl.deleteFramebuffer(fbo);
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>