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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.
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test draw framebuffer completeness when an incomplete framebuffer is bound to read framebuffer</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>
<div id="description"></div>
<div id="console"></div>
<script>
// This exposes a bug in Chrome 67: If the read framebuffer is incomplete, then draw can fail even if the draw framebuffer is complete.
"use strict";
description();
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext(undefined, undefined, 2);
if (!gl) {
testFailed("context does not exist");
} else {
testPassed("context exists");
var incompleteFb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, incompleteFb);
var incompleteTex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, incompleteTex);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, incompleteTex, 0);
shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT');
wtu.setupUnitQuad(gl, 0, 1);
var testProgram = wtu.setupSimpleColorProgram(gl, 0);
// If this is changed to gl.FRAMEBUFFER, the rendering succeeds on Chrome 67.
var drawFbTarget = gl.DRAW_FRAMEBUFFER;
var completeFb = gl.createFramebuffer();
gl.bindFramebuffer(drawFbTarget, completeFb);
var completeTex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, completeTex);
gl.texStorage2D(gl.TEXTURE_2D, 1, gl.RGBA8, 128, 128);
gl.framebufferTexture2D(drawFbTarget, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, completeTex, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after setup");
shouldBe('gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT');
shouldBe('gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
gl.viewport(0, 0, 128, 128);
gl.uniform4f(gl.getUniformLocation(testProgram, 'u_color'), 0, 1, 0, 1);
wtu.drawUnitQuad(gl);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after draw");
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, completeFb);
wtu.checkCanvasRect(gl, 0, 0, 128, 128, [0, 255, 0, 255], 'should be green', 2);
}
debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>