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<meta charset="utf-8">
<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>
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<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var wtu = WebGLTestUtils;
var gl;
function checkFramebuffer(expected) {
var actual = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
if (expected.indexOf(actual) < 0) {
var msg = "checkFramebufferStatus expects [";
for (var index = 0; index < expected.length; ++index) {
msg += wtu.glEnumToString(gl, expected[index]);
if (index + 1 < expected.length)
msg += ", ";
}
msg += "], was " + wtu.glEnumToString(gl, actual);
testFailed(msg);
} else {
var msg = "checkFramebufferStatus got " + wtu.glEnumToString(gl, actual) +
" as expected";
testPassed(msg);
}
}
function checkBufferBits(attachment0, attachment1) {
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE)
return;
var haveDepthBuffer = attachment0 == gl.DEPTH_ATTACHMENT ||
attachment0 == gl.DEPTH_STENCIL_ATTACHMENT ||
attachment1 == gl.DEPTH_ATTACHMENT ||
attachment1 == gl.DEPTH_STENCIL_ATTACHMENT;
var haveStencilBuffer = attachment0 == gl.STENCIL_ATTACHMENT ||
attachment0 == gl.DEPTH_STENCIL_ATTACHMENT ||
attachment1 == gl.STENCIL_ATTACHMENT ||
attachment1 == gl.DEPTH_STENCIL_ATTACHMENT;
shouldBeTrue("gl.getParameter(gl.RED_BITS) + gl.getParameter(gl.GREEN_BITS) + " +
"gl.getParameter(gl.BLUE_BITS) + gl.getParameter(gl.ALPHA_BITS) >= 16");
if (haveDepthBuffer)
shouldBeTrue("gl.getParameter(gl.DEPTH_BITS) >= 16");
else
shouldBeTrue("gl.getParameter(gl.DEPTH_BITS) == 0");
if (haveStencilBuffer)
shouldBeTrue("gl.getParameter(gl.STENCIL_BITS) >= 8");
else
shouldBeTrue("gl.getParameter(gl.STENCIL_BITS) == 0");
}
function testFramebufferWebGL1RequiredCombinations() {
debug("Checking combinations of framebuffer attachments required to be valid by WebGL 1");
// Per discussion with the OpenGL ES working group, the following framebuffer attachment
// combinations are required to work in all WebGL 1 implementations:
// 1. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture
// 2. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture + DEPTH_ATTACHMENT = DEPTH_COMPONENT16 renderbuffer
// 3. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture + DEPTH_STENCIL_ATTACHMENT = DEPTH_STENCIL renderbuffer
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var width = 64;
var height = 64;
// 1. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits();
// 2. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture + DEPTH_ATTACHMENT = DEPTH_COMPONENT16 renderbuffer
var renderbuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, width, height);
gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, renderbuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_ATTACHMENT);
gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, null);
// 3. COLOR_ATTACHMENT0 = RGBA/UNSIGNED_BYTE texture + DEPTH_STENCIL_ATTACHMENT = DEPTH_STENCIL renderbuffer
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, width, height);
gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, renderbuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_STENCIL_ATTACHMENT);
// Clean up
gl.deleteRenderbuffer(renderbuffer);
gl.deleteTexture(texture);
gl.deleteFramebuffer(fbo);
}
function testDepthStencilAttachmentBehaviors() {
debug("");
debug("Checking ES3 DEPTH_STENCIL_ATTACHMENT behaviors are implemented for WebGL 2");
// DEPTH_STENCIL_ATTACHMENT is treated as an independent attachment point in WebGL 1;
// however, in WebGL 2, it is treated as an alias for DEPTH_ATTACHMENT + STENCIL_ATTACHMENT.
var size = 16;
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var colorBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, size, size);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
var depthBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, depthBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, size, size);
var stencilBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, stencilBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, size, size);
var depthStencilBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, depthStencilBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, size, size);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
debug("color + depth");
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthBuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_ATTACHMENT);
debug("color + depth + stencil: depth != stencil");
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, stencilBuffer);
checkFramebuffer([gl.FRAMEBUFFER_UNSUPPORTED]);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, null);
debug("color + depth: DEPTH_STENCIL for DEPTH_ATTACHMENT");
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthStencilBuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_ATTACHMENT);
debug("color + depth + stencil: DEPTH_STENCIL for DEPTH_ATTACHMENT and STENCIL_ATTACHMENT");
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, depthStencilBuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_STENCIL_ATTACHMENT);
debug("color + depth_stencil");
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.DEPTH24_STENCIL8, size, size, 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, null);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.TEXTURE_2D, texture, 0);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.TEXTURE_2D, null, 0);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, depthStencilBuffer);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_STENCIL_ATTACHMENT);
debug("DEPTH_STENCIL_ATTACHMENT overwrites DEPTH_ATTACHMENT/STENCIL_ATTACHMENT")
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, depthStencilBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, null);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits();
debug("STENCIL_ATTACHMENT overwrites stencil set by DEPTH_STENCIL_ATTACHMENT")
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, depthStencilBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, null);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
checkBufferBits(gl.DEPTH_ATTACHMENT);
}
function testFramebufferIncompleteAttachment() {
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var colorBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
debug("");
debug("Wrong storage type for type of attachment should be FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 16, 16);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT]);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
debug("");
debug("0 size attachment should be FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 0, 0);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT]);
gl.deleteRenderbuffer(colorBuffer);
gl.deleteFramebuffer(fbo);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
}
function testFramebufferIncompleteMissingAttachment() {
debug("");
debug("No attachments should be INCOMPLETE_FRAMEBUFFER_MISSING_ATTACHMENT");
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT]);
var colorBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, null);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT]);
gl.deleteRenderbuffer(colorBuffer);
gl.deleteFramebuffer(fbo);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
}
function testFramebufferWithImagesOfDifferentSizes() {
debug("");
debug("Attachments of different sizes should NOT be allowed");
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var colorBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16);
var depthBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, depthBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 16, 16);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 32, 16);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_DIMENSIONS]);
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 32);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_DIMENSIONS]);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 16, 16, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 32, 16, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_DIMENSIONS]);
}
gl.deleteTexture(tex);
gl.deleteRenderbuffer(depthBuffer);
gl.deleteRenderbuffer(colorBuffer);
gl.deleteFramebuffer(fbo);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
}
function testUsingIncompleteFramebuffer() {
debug("");
debug("Test drawing or reading from an incomplete framebuffer");
var program = wtu.setupTexturedQuad(gl);
var tex = gl.createTexture();
wtu.fillTexture(gl, tex, 1, 1, [0,255,0,255]);
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT]);
debug("");
debug("Drawing or reading from an incomplete framebuffer should generate INVALID_FRAMEBUFFER_OPERATION");
testRenderingAndReading();
var colorBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, colorBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, colorBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 0, 0);
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT]);
debug("");
debug("Drawing or reading from an incomplete framebuffer should generate INVALID_FRAMEBUFFER_OPERATION");
testRenderingAndReading();
function testRenderingAndReading() {
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
wtu.clearAndDrawUnitQuad(gl);
wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION, "drawArrays with incomplete framebuffer");
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array(4));
wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION, "readPixels from incomplete framebuffer");
// copyTexImage and copyTexSubImage can be either INVALID_FRAMEBUFFER_OPERATION because
// the framebuffer is invalid OR INVALID_OPERATION because in the case of no attachments
// the framebuffer is not of a compatible type.
gl.copyTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 0, 0, 1, 1);
wtu.glErrorShouldBe(gl, [gl.INVALID_FRAMEBUFFER_OPERATION, gl.INVALID_OPERATION],
"copyTexImage2D from incomplete framebuffer");
gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, 1, 1, 0);
wtu.glErrorShouldBe(gl, [gl.INVALID_FRAMEBUFFER_OPERATION, gl.INVALID_OPERATION],
"copyTexSubImage2D from incomplete framebuffer");
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION, "clear with incomplete framebuffer");
}
gl.deleteRenderbuffer(colorBuffer);
gl.deleteFramebuffer(fbo);
gl.deleteTexture(tex);
gl.deleteProgram(program);
}
function testReadingFromMissingAttachment() {
debug("");
debug("Test drawing or reading from a framebuffer with no color image");
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var size = 16;
// The only scenario we can verify is an attempt to read or copy
// from a missing color attachment while the framebuffer is still
// complete.
var depthBuffer = gl.createRenderbuffer();
gl.bindRenderbuffer(gl.RENDERBUFFER, depthBuffer);
gl.framebufferRenderbuffer(
gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthBuffer);
gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, size, size);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "After depth renderbuffer setup");
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
// The FBO has no color attachment. ReadPixels, CopyTexImage2D,
// and CopyTexSubImage2D should all generate INVALID_OPERATION.
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Before ReadPixels from missing attachment");
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array(4));
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "After ReadPixels from missing attachment");
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Before CopyTexImage2D from missing attachment");
gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, size, size, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "After CopyTexImage2D from missing attachment");
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Before CopyTexSubImage2D from missing attachment");
gl.copyTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 0, 0, size, size);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "After CopyTexSubImage2D from missing attachment");
gl.deleteTexture(tex);
}
gl.deleteRenderbuffer(depthBuffer);
gl.deleteFramebuffer(fbo);
}
description("Test framebuffer object attachment behaviors");
shouldBeNonNull("gl = wtu.create3DContext(undefined, undefined, 2)");
testFramebufferWebGL1RequiredCombinations();
testDepthStencilAttachmentBehaviors();
testFramebufferIncompleteAttachment();
testFramebufferIncompleteMissingAttachment();
testFramebufferWithImagesOfDifferentSizes();
testUsingIncompleteFramebuffer();
testReadingFromMissingAttachment();
debug("")
var successfullyParsed = true;
</script>
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