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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/readbuffer.html b/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/readbuffer.html new file mode 100644 index 0000000000..56bfd656a4 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/readbuffer.html @@ -0,0 +1,174 @@ +<!-- +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>Test readBuffer 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="20" height="20"> </canvas> +<script> +"use strict"; +description("This tests reading from fbo"); + +var clearDrawingbuffer = function(color) { + gl.clearColor(color[0] / 255, color[1] / 255, color[2] / 255, color[3] / 255); + gl.clear(gl.COLOR_BUFFER_BIT); +} + +var validateReadingFromFramebuffer = function(color, expected, msg) { + var pixels = new Uint8Array(1 * 1 * 4); + gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); + wtu.glErrorShouldBe(gl, expected, msg); + if (expected == gl.NO_ERROR) + wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, color, + "the color should be [" + color + "]"); +} + +var setupRenderbuffer = function(attachment) { + var renderbuffer = gl.createRenderbuffer(); + gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer); + gl.framebufferRenderbuffer(gl.FRAMEBUFFER, attachment, gl.RENDERBUFFER, renderbuffer); + gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, canvas.width, canvas.height); + return renderbuffer; +} + +var testReadBufferOnDefaultFB = function() { + gl.readBuffer(gl.NONE); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, + "calling readBuffer with GL_NONE on the default framebuffer should succeed."); + var pixels = new Uint8Array(1 * 1 * 4); + gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); + wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, + "should generate INVALID_OPERATION when reading from framebuffer and read buffer is GL_NONE."); + gl.readBuffer(gl.BACK); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, + "calling readBuffer with GL_BACK on the default framebuffer should succeed."); + + gl.readBuffer(gl.COLOR_ATTACHMENT0); + wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, + "calling readBuffer with GL_COLOR_ATTACHMENT0 on the default framebuffer should generate INVALID_OPERATION."); +} + +var testReadBufferOnFBO = function() { + gl.readBuffer(gl.BACK); + wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, + "calling readBuffer with GL_BACK on fbo should generate INVALID_OPERATION."); + + gl.readBuffer(gl.NONE); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, + "calling readBuffer with GL_NONE on fbo should succeed."); + var pixels = new Uint8Array(1 * 1 * 4); + gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, pixels); + wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, + "should generate INVALID_OPERATION when reading from framebuffer and read buffer is GL_NONE."); + gl.readBuffer(gl.COLOR_ATTACHMENT0); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, + "calling readBuffer with GL_COLOR_ATTACHMENT0 on fbo should succeed."); + + var maxColorAttachments = gl.getParameter(gl.MAX_COLOR_ATTACHMENTS); + gl.readBuffer(gl.COLOR_ATTACHMENT0 + maxColorAttachments); + wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, + "calling readBuffer with GL_COLOR_ATTACHMENTi that exceeds MAX_COLOR_ATTACHMENT on fbo should generate INVALID_OPERATION."); + gl.readBuffer(gl.COLOR_ATTACHMENT1); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, + "calling readBuffer with GL_COLOR_ATTACHMENT1 on the fbo should succeed."); + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.COLOR_ATTACHMENT1'); +} + +debug(""); +debug("Canvas.getContext"); + +var wtu = WebGLTestUtils; +var canvas = document.getElementById("canvas"); +var gl = wtu.create3DContext(canvas, undefined, 2); +if (!gl) { + testFailed("context does not exist"); +} else { + testPassed("context exists"); + + debug(""); + debug("Checking reading from framebuffer."); + + // Test on the default framebuffer. Read buffer is GL_BACK by default. + var backColor = [0, 0, 0, 255]; + clearDrawingbuffer(backColor); + validateReadingFromFramebuffer(backColor, gl.NO_ERROR, + "should be no errors when reading from GL_BACK on the default framebuffer."); + + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.BACK'); + testReadBufferOnDefaultFB(); + + // Test on fbo. Read buffer is GL_COLOR_ATTACHMENT0 by default + var fb = gl.createFramebuffer(); + gl.bindFramebuffer(gl.FRAMEBUFFER, fb); + var colorbuffer = setupRenderbuffer(gl.COLOR_ATTACHMENT0); + var red = [255, 0, 0, 255]; + clearDrawingbuffer(red); + validateReadingFromFramebuffer(red, gl.NO_ERROR, + "should be no errors when reading from GL_COLOR_ATTACHMENT0 on fbo."); + + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.COLOR_ATTACHMENT0'); + testReadBufferOnFBO(); + + // Test on user defined read buffer (GL_COLOR_ATTACHMENT1) with or without corresponding image on fbo. + gl.bindFramebuffer(gl.FRAMEBUFFER, fb); + var colorbuffer1 = setupRenderbuffer(gl.COLOR_ATTACHMENT1); + var green = [0, 255, 0, 255]; + gl.drawBuffers([gl.NONE, gl.COLOR_ATTACHMENT1]); + clearDrawingbuffer(green); + wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after setup and clear render buffer"); + gl.readBuffer(gl.COLOR_ATTACHMENT1); + validateReadingFromFramebuffer(green, gl.NO_ERROR, + "should be no errors when reading from GL_COLOR_ATTACHMENT1 on fbo."); + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.COLOR_ATTACHMENT1'); + // Need to reset draw buffers, otherwise it triggers a mac driver bug. + // We add a separate test for that bug: conformance2/rendering/framebuffer-completeness-unaffected.html + gl.drawBuffers([gl.COLOR_ATTACHMENT0]); + + gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT1, gl.RENDERBUFFER, null) + gl.readBuffer(gl.COLOR_ATTACHMENT1); + validateReadingFromFramebuffer(null, gl.INVALID_OPERATION, + "should generate INVALID_OPERATION when reading from GL_COLOR_ATTACHMENT1 but this attachment has no image currently."); + + // switch to another fbo, read buffer is GL_COLOR_ATTACHMENT0, not GL_COLOR_ATTACHMENT1 + var fb1 = gl.createFramebuffer(); + gl.bindFramebuffer(gl.FRAMEBUFFER, fb1); + var buffer = setupRenderbuffer(gl.COLOR_ATTACHMENT0); + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.COLOR_ATTACHMENT0'); + var blue = [0, 0, 255, 255]; + clearDrawingbuffer(blue); + validateReadingFromFramebuffer(blue, gl.NO_ERROR, + "should be no errors when reading from GL_COLOR_ATTACHMENT0 on another fbo."); + + // switch from fbo to default fb, read buffer will switch to GL_BACK from GL_COLOR_ATTACHMENT0 + gl.bindFramebuffer(gl.FRAMEBUFFER, null); + shouldBe('gl.getParameter(gl.READ_BUFFER)', 'gl.BACK'); + validateReadingFromFramebuffer(backColor, gl.NO_ERROR, + "should be no errors when reading from GL_BACK on the default framebuffer."); + + gl.deleteFramebuffer(fb); + gl.deleteRenderbuffer(colorbuffer); + gl.deleteRenderbuffer(colorbuffer1); + gl.deleteFramebuffer(fb1); + gl.deleteRenderbuffer(buffer); +} + +debug(""); +var successfullyParsed = true; + +</script> +<script src="../../js/js-test-post.js"></script> + +</body> +</html> |