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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>WebGL Framebuffer Test Against WebGL 2</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>
+<canvas id="canvas" width="2" height="2"> </canvas>
+<script>
+"use strict";
+var wtu = WebGLTestUtils;
+var gl;
+
+function testFramebufferRenderbuffer() {
+ debug("");
+ debug("Checking framebuffer/renderbuffer stuff.");
+
+ gl.getFramebufferAttachmentParameter(
+ gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
+ wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
+ "getFramebufferAttachmentParameter(COLOR_ATTACHMENT0) on the default framebuffer.");
+ gl.getFramebufferAttachmentParameter(
+ gl.FRAMEBUFFER, gl.BACK, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "getFramebufferAttachmentParameter(BACK) on the default framebuffer.");
+ gl.checkFramebufferStatus(gl.FRAMEBUFFER);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "checkFramebufferStatus on the default framebuffer.");
+
+ var tex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ 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, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "attach a texture to default framebuffer.");
+
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "detach default renderbuffer from default framebuffer.");
+
+ var rb = gl.createRenderbuffer();
+ gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
+ gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, canvas.width, canvas.height);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "allocate renderbuffer storage of a newly created renderbuffer.");
+
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "attach a renderbuffer to the default framebuffer.");
+
+ var fbtex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, fbtex);
+ gl.texImage2D(
+ gl.TEXTURE_2D, 0, gl.RGBA, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+ var fb = gl.createFramebuffer();
+
+ gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "bind a newly created framebuffer.");
+
+ var target = gl.READ_FRAMEBUFFER;
+ gl.getFramebufferAttachmentParameter(
+ target, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "getFramebufferAttachmentParameter(READ_FRAMEBUFFER).");
+ assertMsg(gl.checkFramebufferStatus(target) != 0,
+ "checkFramebufferStatus(READ_FRAMEBUFFER) should succeed.");
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "checkFramebufferStatus(READ_FRAMEBUFFER).");
+ var readFB = gl.createFramebuffer();
+ gl.bindFramebuffer(target, readFB);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "bindFramebuffer(READ_FRAMEBUFFER).");
+ assertMsg(readFB == gl.getParameter(gl.READ_FRAMEBUFFER_BINDING),
+ "bindFramebuffer(READ_FRAMEBUFFER) should change READ_FRAMEBUFFER_BINDING.");
+ assertMsg(fb == gl.getParameter(gl.DRAW_FRAMEBUFFER_BINDING),
+ "bindFramebuffer(READ_FRAMEBUFFER) should not change DRAW_FRAMEBUFFER_BINDING.");
+ gl.getFramebufferAttachmentParameter(
+ target, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE) with no attachment.");
+ gl.framebufferTexture2D(target, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "framebufferTexImage2D(READ_FRAMEBUFFER).");
+ gl.framebufferRenderbuffer(target, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "framebufferRenderbuffer(READ_FRAMEBUFFER).");
+
+ var colorAttachmentsNum = gl.getParameter(gl.MAX_COLOR_ATTACHMENTS);
+ if (colorAttachmentsNum >= 2) {
+ var attachment = gl.COLOR_ATTACHMENT1;
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, attachment, gl.TEXTURE_2D, fbtex, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "framebufferTexImage2D(COLOR_ATTACHMENT1).");
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, attachment, gl.TEXTURE_2D, null, 0);
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, attachment, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "framebufferRenderbuffer(COLOR_ATTACHMENT1).");
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, attachment, gl.RENDERBUFFER, null);
+ }
+
+ gl.getFramebufferAttachmentParameter(
+ gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "with no attachment.");
+
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "attach a texture to a framebuffer.");
+
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, null, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "detach a texture from a framebuffer.");
+
+ function numLevelsFromSize(size) {
+ var levels = 0;
+ while ((size >> levels) > 0) {
+ ++levels;
+ }
+ return levels;
+ }
+
+ var maxTexSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
+ var maxLevels = numLevelsFromSize(maxTexSize);
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, maxLevels - 1);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "framebufferTexture2D with an appropriate mipmap level.");
+ gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, maxLevels);
+ wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "framebufferTexture2D with a mipmap level out of range.");
+
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "attach a renderbuffer to a framebuffer.");
+
+ gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "detach a renderbuffer from a framebuffer.");
+
+ gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "bind default (null) framebuffer.");
+
+ // attach/detach a 2d texture to one framebuffer binding point,
+ // while no attachment to the other binding point.
+ function attachAndDetachTexture(targetA, targetB) {
+ gl.framebufferTexture2D(targetA, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "attach a texture to read/draw framebuffer binding point.");
+ gl.getFramebufferAttachmentParameter(
+ targetA, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on read/draw framebuffer.");
+ gl.getFramebufferAttachmentParameter(
+ targetB, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on read/draw framebuffer with no attachment.");
+ gl.framebufferTexture2D(targetA, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, null, 0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "detach a texture from read/draw framebuffer.");
+ }
+
+ var readFBWithTexture = gl.createFramebuffer();
+ var drawFBWithTexture = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.READ_FRAMEBUFFER, readFBWithTexture);
+ gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, drawFBWithTexture);
+ attachAndDetachTexture(gl.READ_FRAMEBUFFER, gl.DRAW_FRAMEBUFFER);
+ attachAndDetachTexture(gl.DRAW_FRAMEBUFFER, gl.READ_FRAMEBUFFER);
+
+ // attach different textures as color attachment to read and draw framebuffer respectively,
+ // then detach these attachments.
+ var fbtex1 = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, fbtex1);
+ gl.texImage2D(
+ gl.TEXTURE_2D, 0, gl.RG8, canvas.width, canvas.height, 0, gl.RG, gl.UNSIGNED_BYTE, null);
+ gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex1, 0);
+ gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, fbtex, 0);
+ shouldBeNonZero('gl.getFramebufferAttachmentParameter(gl.READ_FRAMEBUFFER, ' +
+ 'gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_BLUE_SIZE)');
+ shouldBe('gl.getFramebufferAttachmentParameter(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, ' +
+ 'gl.FRAMEBUFFER_ATTACHMENT_BLUE_SIZE)', '0');
+
+ gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, null, 0);
+ gl.getFramebufferAttachmentParameter(
+ gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on read framebuffer with no attachment.");
+ gl.getFramebufferAttachmentParameter(
+ gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on draw framebuffer.");
+ gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, null, 0);
+ gl.getFramebufferAttachmentParameter(
+ gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on draw framebuffer with no attachment.");
+
+ // attach/detach a renderbuffer to one framebuffer binding point,
+ // while no attachment to the other binding point.
+ function attachAndDetachRenderbuffer(targetA, targetB) {
+ gl.framebufferRenderbuffer(targetA, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "attaching a renderbuffer to a read/draw framebuffer.");
+ gl.getFramebufferAttachmentParameter(
+ targetA, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on read/draw framebuffer.");
+ gl.getFramebufferAttachmentParameter(
+ targetB, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING) " +
+ "on read/draw framebuffer with no attachment.");
+ gl.framebufferRenderbuffer(targetA, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "detach a renderbuffer from a read/draw framebuffer.");
+ }
+
+ var readFBWithRenderbuffer = gl.createFramebuffer();
+ var drawFBWithRenderbuffer = gl.createFramebuffer();
+ gl.bindFramebuffer(gl.READ_FRAMEBUFFER, readFBWithRenderbuffer);
+ gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, drawFBWithRenderbuffer);
+ attachAndDetachRenderbuffer(gl.READ_FRAMEBUFFER, gl.DRAW_FRAMEBUFFER);
+ attachAndDetachRenderbuffer(gl.DRAW_FRAMEBUFFER, gl.READ_FRAMEBUFFER);
+
+ // attach different renderbuffers to read and draw framebuffer respectively,
+ // then detach these attachments.
+ var depthRB = gl.createRenderbuffer();
+ gl.bindRenderbuffer(gl.RENDERBUFFER, depthRB);
+ gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, canvas.width, canvas.height);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR,
+ "allocating renderbuffer storage of a newly created renderbuffer.");
+ gl.framebufferRenderbuffer(gl.DRAW_FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, depthRB);
+ gl.framebufferRenderbuffer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);
+ shouldBeNonZero('gl.getFramebufferAttachmentParameter(gl.READ_FRAMEBUFFER, ' +
+ 'gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_RED_SIZE)');
+ gl.getFramebufferAttachmentParameter(
+ gl.READ_FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_DEPTH_SIZE);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE) " +
+ "on read framebuffer without depth attachment.");
+ shouldBeNonZero('gl.getFramebufferAttachmentParameter(gl.DRAW_FRAMEBUFFER, ' +
+ 'gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE)');
+ gl.getFramebufferAttachmentParameter(
+ gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_RED_SIZE);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_RED_SIZE) " +
+ "on draw framebuffer without color attachment.");
+
+ gl.framebufferRenderbuffer(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, null);
+ gl.getFramebufferAttachmentParameter(
+ gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_RED_SIZE);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_RED_SIZE) " +
+ "on read framebuffer with no attachment.");
+ shouldBeNonZero('gl.getFramebufferAttachmentParameter(gl.DRAW_FRAMEBUFFER, ' +
+ 'gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE)');
+ gl.framebufferRenderbuffer(gl.DRAW_FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, null);
+ gl.getFramebufferAttachmentParameter(
+ gl.DRAW_FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_DEPTH_SIZE);
+ wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
+ "getFramebufferAttachmentParameter(FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE) " +
+ "on draw framebuffer with no attachment.");
+
+ // binding read/draw framebuffer to default framebuffer
+ gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "bind read framebuffer to default (null) framebuffer.");
+
+ gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "bind draw framebuffer to default (null) framebuffer.");
+}
+
+description("This tests framebuffer/renderbuffer-related functions");
+
+var canvas = document.getElementById("canvas");
+shouldBeNonNull("gl = wtu.create3DContext(canvas, undefined, 2)");
+
+testFramebufferRenderbuffer();
+
+debug("");
+var successfullyParsed = true;
+
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 04:44:34 +0000