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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>Deleted Object Behavior</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="canvases">
+<canvas id="canvas1">
+</div>
+<div id="console"></div>
+
+<script>
+"use strict";
+description("Verifies behavior of deleted objects");
+
+const wtu = WebGLTestUtils;
+const canvas1 = document.getElementById("canvas1");
+const sz = 64;
+canvas1.width = sz;
+canvas1.height = sz;
+const gl = wtu.create3DContext("canvas1");
+let tex, rb; // for shouldBe
+
+function testBoundFBOTexture() {
+ debug("Verifies that a texture attached to a bound framebuffer and then deleted is automatically detached");
+
+ let fb = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ tex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, sz, sz, 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, "should be no errors during framebuffer setup");
+ // The WebGL 1.0 spec guarantees that this combination of attachments results
+ // in a complete framebuffer.
+ shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE",
+ "Framebuffer should be complete after setup");
+ debug("Texture should still be bound to the context");
+ shouldBe("gl.getParameter(gl.TEXTURE_BINDING_2D)", "tex");
+ // Delete the texture.
+ gl.deleteTexture(tex);
+ debug("Texture should have been unbound from the context");
+ shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
+ debug("Framebuffer should report that the texture was detached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
+ debug("Framebuffer should be incomplete after texture was deleted");
+ shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+ debug("Texture should not report that it's still a texture after deletion");
+ shouldBe("gl.isTexture(tex)", "false");
+ // Framebuffer should not function.
+ gl.clearColor(0.0, 1.0, 0.0, 1.0);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION, "Framebuffer should not work after deleting its only attachment");
+ // Default framebuffer shouldn't have been touched.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 0, 0, 0], "default framebuffer should be transparent black");
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors after verifying default framebuffer's contents");
+ // Attempt to bind deleted texture should fail.
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "from binding deleted texture");
+ debug("");
+ gl.deleteFramebuffer(fb);
+}
+
+function testUnboundFBOTexture() {
+ debug("Verifies that a texture attached to an unbound framebuffer and then deleted remains usable until detached");
+
+ let fb = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ tex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, sz, sz, 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, "should be no errors during framebuffer setup");
+ // The WebGL 1.0 spec guarantees that this combination of attachments results
+ // in a complete framebuffer.
+ shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE",
+ "Framebuffer should be complete after setup");
+ // Unbind the framebuffer from the context so that deleting the texture
+ // doesn't automatically unbind it from the framebuffer.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ debug("Texture should still be bound to the context");
+ shouldBe("gl.getParameter(gl.TEXTURE_BINDING_2D)", "tex");
+ // Delete the texture.
+ gl.deleteTexture(tex);
+ debug("Texture should have been unbound from the context");
+ shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
+ // Framebuffer should still be complete.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ debug("Framebuffer should still be complete after texture was deleted");
+ shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+ debug("Framebuffer should report that the texture is still attached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "tex");
+ debug("Texture should not report that it's still a texture after deletion");
+ shouldBe("gl.isTexture(tex)", "false");
+ // Framebuffer should still function.
+ gl.clearColor(0.0, 1.0, 0.0, 1.0);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 255, 0, 255], "framebuffer should be green");
+ // Deleting texture a second time should not unbind it from the framebuffer.
+ gl.deleteTexture(tex);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "deleting an object twice is not an error");
+ debug("Framebuffer should still report that the texture is attached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "tex");
+ // Default framebuffer shouldn't have been touched.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 0, 0, 0], "default framebuffer should be transparent black");
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors after verifying framebuffers' contents");
+ // Attempt to bind deleted texture should fail.
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "from binding deleted texture");
+ debug("");
+ gl.deleteFramebuffer(fb);
+}
+
+function testBoundFBORenderbuffer() {
+ debug("Verifies that a renderbuffer attached to a bound framebuffer and then deleted is automatically detached");
+
+ let fb = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ rb = gl.createRenderbuffer();
+ gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
+ gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, sz, sz)
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors during framebuffer setup");
+ // The WebGL 1.0 spec doesn't guarantee that this framebuffer configuration
+ // will be complete.
+ if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
+ debug("Framebuffer with GL_RGBA4 renderbuffer was incomplete; skipping test");
+ return;
+ }
+ debug("Renderbuffer should still be bound to the context");
+ shouldBe("gl.getParameter(gl.RENDERBUFFER_BINDING)", "rb");
+ // Delete the renderbuffer.
+ gl.deleteRenderbuffer(rb);
+ debug("Renderbuffer should have been unbound from the context");
+ shouldBeNull("gl.getParameter(gl.RENDERBUFFER_BINDING)");
+ debug("Framebuffer should report that the texture was detached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
+ debug("Framebuffer should be incomplete after renderbuffer was deleted");
+ shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+ debug("Renderbuffer should not report that it's still a renderbuffer after deletion");
+ shouldBe("gl.isRenderbuffer(rb)", "false");
+ // Framebuffer should not function.
+ gl.clearColor(0.0, 1.0, 0.0, 1.0);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION, "Framebuffer should not work after deleting its only attachment");
+ // Default framebuffer shouldn't have been touched.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 0, 0, 0], "default framebuffer should be transparent black");
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors after verifying framebuffers' contents");
+ // Attempt to bind deleted renderbuffer should fail.
+ gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "from binding deleted renderbuffer");
+ debug("");
+ gl.deleteFramebuffer(fb);
+}
+
+function testUnboundFBORenderbuffer() {
+ debug("Verifies that a renderbuffer attached to an unbound framebuffer and then deleted remains usable until detached");
+
+ let fb = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ rb = gl.createRenderbuffer();
+ gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
+ gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, sz, sz)
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors during framebuffer setup");
+ // The WebGL 1.0 spec doesn't guarantee that this framebuffer configuration
+ // will be complete.
+ if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
+ debug("Framebuffer with GL_RGBA4 renderbuffer was incomplete; skipping test");
+ return;
+ }
+ // Unbind the framebuffer from the context so that deleting the renderbuffer
+ // doesn't automatically unbind it from the framebuffer.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ debug("Renderbuffer should still be bound to the context");
+ shouldBe("gl.getParameter(gl.RENDERBUFFER_BINDING)", "rb");
+ // Delete the renderbuffer.
+ gl.deleteRenderbuffer(rb);
+ debug("Renderbuffer should have been unbound from the context");
+ shouldBeNull("gl.getParameter(gl.RENDERBUFFER_BINDING)");
+ // Framebuffer should still be complete.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ debug("Framebuffer should still be complete after renderbuffer was deleted");
+ shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+ debug("Framebuffer should report that the renderbuffer is still attached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rb");
+ debug("Renderbuffer should not report that it's still a renderbuffer after deletion");
+ shouldBe("gl.isRenderbuffer(rb)", "false");
+ // Framebuffer should still function.
+ gl.clearColor(0.0, 1.0, 0.0, 1.0);
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ // Use a high tolerance to accommodate low bit depth precision.
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 255, 0, 255], "framebuffer should be green", 20);
+ // Deleting renderbuffer a second time should not unbind it from the framebuffer.
+ gl.deleteRenderbuffer(rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "deleting an object twice is not an error");
+ debug("Framebuffer should still report that the renderbuffer is attached");
+ shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rb");
+ // Default framebuffer shouldn't have been touched.
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ wtu.checkCanvasRect(gl, 0, 0, sz, sz, [0, 0, 0, 0], "default framebuffer should be transparent black");
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors after verifying framebuffers' contents");
+ // Attempt to bind deleted renderbuffer should fail.
+ gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "from binding deleted renderbuffer");
+ debug("");
+ gl.deleteFramebuffer(fb);
+}
+
+function runTests() {
+ testBoundFBOTexture();
+ testUnboundFBOTexture();
+ testBoundFBORenderbuffer();
+ testUnboundFBORenderbuffer();
+ finishTest();
+}
+
+requestAnimationFrame(runTests);
+
+var successfullyParsed = true;
+</script>
+</body>
+</html>
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