LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance2/rendering/blitframebuffer-resolve-to-back-buffer.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2017 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
 ** distribute, sublicense, and/or sell copies of the Materials, and to
 ** permit persons to whom the Materials are furnished to do so, subject to
 ** the following conditions:
 **
 ** The above copyright notice and this permission notice shall be included
 ** in all copies or substantial portions of the Materials.
 **
 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

 -->

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL BlitFramebuffer Resolve to Back Buffer</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="canvasHeader"></div>
 <div id="console"></div>

 <script>
 "use strict";

 var wtu = WebGLTestUtils;
 description("This test verifies the behavior of blitFramebuffer when resolving directly to the back buffer.");

 debug("Regression test for <a href='http://crbug.com/699566'>http://crbug.com/699566</a>");

 function runTest(testParams) {
     // Assume a square framebuffer. Doesn't need to match the size of the canvas, necessarily.
     let sz = 64;

     debug('');
     debug('Testing with alpha = ' + testParams.attribs.alpha +
           ', antialias = ' + testParams.attribs.antialias +
           ', internalformat = ' + testParams.internalformat);

     var canvas = document.createElement('canvas');
     canvas.width = sz;
     canvas.height = sz;
     document.getElementById('canvasHeader').appendChild(canvas);
     var gl = wtu.create3DContext(canvas, testParams.attribs, 2);

     // Find the supported samples for a multisampled renderbuffer of the appropriate internal format.
     let samples = gl.getInternalformatParameter(gl.RENDERBUFFER, gl[testParams.internalformat], gl.SAMPLES);
     if (!samples || !samples.length) {
         testFailed("At least one multisampled format is required to be supported");
         return;
     }

     // Create a framebuffer with a multisampled renderbuffer.
     let rb = gl.createRenderbuffer();
     gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
     gl.renderbufferStorageMultisample(gl.RENDERBUFFER, samples[0], gl[testParams.internalformat], sz, sz);

     // Create a framebuffer.
     let fb = gl.createFramebuffer();
     gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
     gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);

     // Check for completeness.
     if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
         testFailed("Rendering to a multisampled renderbuffer of format " + testParams.internalformat + " is required by the spec");
         return;
     }

     // Clear to specified color.
     gl.clearColor.apply(gl, testParams.clearColor);
     gl.clear(gl.COLOR_BUFFER_BIT);

     // Unbind draw framebuffer. Read framebuffer is now user framebuffer;
     // draw framebuffer is default framebuffer.
     gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);

     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors before blit");

     // Blit from user framebuffer to default framebuffer.
     gl.blitFramebuffer(0, 0, sz, sz, 0, 0, sz, sz, gl.COLOR_BUFFER_BIT, gl.NEAREST);

     if (testParams.shouldSucceed) {
         wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be legal to blit/resolve to default back buffer");
     } else {
         wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "incompatible src/dest blitFramebuffer combination must fail");
     }

     // Unbind user framebuffer completely.
     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);

     if (testParams.shouldSucceed) {
         wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error before readback");
         wtu.checkCanvasRect(gl, 0, 0, 8, 8, testParams.resultColor);
         wtu.glErrorShouldBe(gl, gl.NO_ERROR);
     }
 }

 var tests = [
     // No-alpha, no-antialias, RGB8 source
     {
         attribs: {
             alpha: false,
             antialias: false,
         },
         internalformat: 'RGB8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: true,
     },
     // Alpha, no-antialias, RGB8 source
     {
         attribs: {
             alpha: true,
             antialias: false,
         },
         internalformat: 'RGB8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: false,
     },
     // No-alpha, no-antialias, RGBA8 source
     // premultiplyAlpha:false just to avoid semantically incorrect
     // colors (should only affect rendering, not contents of WebGL
     // back buffer)
     {
         attribs: {
             alpha: false,
             antialias: false,
             premultiplyAlpha: false,
         },
         internalformat: 'RGBA8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: false,
     },
     // Alpha, no-antialias, RGBA8 source
     // premultiplyAlpha:false just to avoid semantically incorrect
     // colors (should only affect rendering, not contents of WebGL
     // back buffer)
     {
         attribs: {
             alpha: true,
             antialias: false,
             premultiplyAlpha: false,
         },
         internalformat: 'RGBA8',
         clearColor: [ 0.0, 1.0, 0.0, 0.0 ],
         resultColor: [ 0, 255, 0, 0 ],
         shouldSucceed: true,
     },

     // All attempts to blit to an antialiased back buffer should fail.

     // No-alpha, antialias, RGB8 source
     {
         attribs: {
             alpha: false,
             antialias: true,
         },
         internalformat: 'RGB8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: false,
     },
     // Alpha, antialias, RGB8 source
     {
         attribs: {
             alpha: true,
             antialias: true,
         },
         internalformat: 'RGB8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: false,
     },
     // No-alpha, antialias, RGBA8 source
     // premultiplyAlpha:false just to avoid semantically incorrect
     // colors (should only affect rendering, not contents of WebGL
     // back buffer)
     {
         attribs: {
             alpha: false,
             antialias: true,
             premultiplyAlpha: false,
         },
         internalformat: 'RGBA8',
         clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
         resultColor: [ 0, 255, 0, 255 ],
         shouldSucceed: false,
     },
     // Alpha, antialias, RGBA8 source
     // premultiplyAlpha:false just to avoid semantically incorrect
     // colors (should only affect rendering, not contents of WebGL
     // back buffer)
     {
         attribs: {
             alpha: true,
             antialias: true,
             premultiplyAlpha: false,
         },
         internalformat: 'RGBA8',
         clearColor: [ 0.0, 1.0, 0.0, 0.0 ],
         resultColor: [ 0, 255, 0, 0 ],
         shouldSucceed: false,
     },
 ];

 for (var ii in tests) {
     runTest(tests[ii]);
 }

 var successfullyParsed = true;
 </script>
 <script src="../../js/js-test-post.js"></script>

 </body>
 </html>
	<!--

	/*
	** Copyright (c) 2017 The Khronos Group Inc.
	**
	** Permission is hereby granted, free of charge, to any person obtaining a
	** copy of this software and/or associated documentation files (the
	** "Materials"), to deal in the Materials without restriction, including
	** without limitation the rights to use, copy, modify, merge, publish,
	** distribute, sublicense, and/or sell copies of the Materials, and to
	** permit persons to whom the Materials are furnished to do so, subject to
	** the following conditions:
	**
	** The above copyright notice and this permission notice shall be included
	** in all copies or substantial portions of the Materials.
	**
	** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
	*/

	-->

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebGL BlitFramebuffer Resolve to Back Buffer</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="canvasHeader"></div>
	<div id="console"></div>

	<script>
	"use strict";

	var wtu = WebGLTestUtils;
	description("This test verifies the behavior of blitFramebuffer when resolving directly to the back buffer.");

	debug("Regression test for <a href='http://crbug.com/699566'>http://crbug.com/699566</a>");

	function runTest(testParams) {
	// Assume a square framebuffer. Doesn't need to match the size of the canvas, necessarily.
	let sz = 64;

	debug('');
	debug('Testing with alpha = ' + testParams.attribs.alpha +
	', antialias = ' + testParams.attribs.antialias +
	', internalformat = ' + testParams.internalformat);

	var canvas = document.createElement('canvas');
	canvas.width = sz;
	canvas.height = sz;
	document.getElementById('canvasHeader').appendChild(canvas);
	var gl = wtu.create3DContext(canvas, testParams.attribs, 2);

	// Find the supported samples for a multisampled renderbuffer of the appropriate internal format.
	let samples = gl.getInternalformatParameter(gl.RENDERBUFFER, gl[testParams.internalformat], gl.SAMPLES);
	if (!samples \|\| !samples.length) {
	testFailed("At least one multisampled format is required to be supported");
	return;
	}

	// Create a framebuffer with a multisampled renderbuffer.
	let rb = gl.createRenderbuffer();
	gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
	gl.renderbufferStorageMultisample(gl.RENDERBUFFER, samples[0], gl[testParams.internalformat], sz, sz);

	// Create a framebuffer.
	let fb = gl.createFramebuffer();
	gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
	gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rb);

	// Check for completeness.
	if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
	testFailed("Rendering to a multisampled renderbuffer of format " + testParams.internalformat + " is required by the spec");
	return;
	}

	// Clear to specified color.
	gl.clearColor.apply(gl, testParams.clearColor);
	gl.clear(gl.COLOR_BUFFER_BIT);

	// Unbind draw framebuffer. Read framebuffer is now user framebuffer;
	// draw framebuffer is default framebuffer.
	gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);

	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors before blit");

	// Blit from user framebuffer to default framebuffer.
	gl.blitFramebuffer(0, 0, sz, sz, 0, 0, sz, sz, gl.COLOR_BUFFER_BIT, gl.NEAREST);

	if (testParams.shouldSucceed) {
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be legal to blit/resolve to default back buffer");
	} else {
	wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "incompatible src/dest blitFramebuffer combination must fail");
	}

	// Unbind user framebuffer completely.
	gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);

	if (testParams.shouldSucceed) {
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error before readback");
	wtu.checkCanvasRect(gl, 0, 0, 8, 8, testParams.resultColor);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR);
	}
	}

	var tests = [
	// No-alpha, no-antialias, RGB8 source
	{
	attribs: {
	alpha: false,
	antialias: false,
	},
	internalformat: 'RGB8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: true,
	},
	// Alpha, no-antialias, RGB8 source
	{
	attribs: {
	alpha: true,
	antialias: false,
	},
	internalformat: 'RGB8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: false,
	},
	// No-alpha, no-antialias, RGBA8 source
	// premultiplyAlpha:false just to avoid semantically incorrect
	// colors (should only affect rendering, not contents of WebGL
	// back buffer)
	{
	attribs: {
	alpha: false,
	antialias: false,
	premultiplyAlpha: false,
	},
	internalformat: 'RGBA8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: false,
	},
	// Alpha, no-antialias, RGBA8 source
	// premultiplyAlpha:false just to avoid semantically incorrect
	// colors (should only affect rendering, not contents of WebGL
	// back buffer)
	{
	attribs: {
	alpha: true,
	antialias: false,
	premultiplyAlpha: false,
	},
	internalformat: 'RGBA8',
	clearColor: [ 0.0, 1.0, 0.0, 0.0 ],
	resultColor: [ 0, 255, 0, 0 ],
	shouldSucceed: true,
	},

	// All attempts to blit to an antialiased back buffer should fail.

	// No-alpha, antialias, RGB8 source
	{
	attribs: {
	alpha: false,
	antialias: true,
	},
	internalformat: 'RGB8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: false,
	},
	// Alpha, antialias, RGB8 source
	{
	attribs: {
	alpha: true,
	antialias: true,
	},
	internalformat: 'RGB8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: false,
	},
	// No-alpha, antialias, RGBA8 source
	// premultiplyAlpha:false just to avoid semantically incorrect
	// colors (should only affect rendering, not contents of WebGL
	// back buffer)
	{
	attribs: {
	alpha: false,
	antialias: true,
	premultiplyAlpha: false,
	},
	internalformat: 'RGBA8',
	clearColor: [ 0.0, 1.0, 0.0, 1.0 ],
	resultColor: [ 0, 255, 0, 255 ],
	shouldSucceed: false,
	},
	// Alpha, antialias, RGBA8 source
	// premultiplyAlpha:false just to avoid semantically incorrect
	// colors (should only affect rendering, not contents of WebGL
	// back buffer)
	{
	attribs: {
	alpha: true,
	antialias: true,
	premultiplyAlpha: false,
	},
	internalformat: 'RGBA8',
	clearColor: [ 0.0, 1.0, 0.0, 0.0 ],
	resultColor: [ 0, 255, 0, 0 ],
	shouldSucceed: false,
	},
	];

	for (var ii in tests) {
	runTest(tests[ii]);
	}

	var successfullyParsed = true;
	</script>
	<script src="../../js/js-test-post.js"></script>

	</body>
	</html>