LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance2/rendering/depth-stencil-feedback-loop.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2016 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 Rendering and Sampling Feedback Loop Tests for Depth/Stencil 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>
 <canvas id="example" width="8" height="8"></canvas>
 <div id="description"></div>
 <div id="console"></div>

 <script id="vshader" type="x-shader/x-vertex">#version 300 es
 in highp vec4 aPosition;
 in vec2 aTexCoord;
 out vec2 texCoord;
 void main() {
     gl_Position = aPosition;
     texCoord = aTexCoord;
 }
 </script>

 <script id="fshader" type="x-shader/x-fragment">#version 300 es
 precision mediump float;
 uniform sampler2D tex;
 in vec2 texCoord;
 out vec4 oColor;
 void main() {
     oColor = texture(tex, texCoord);
 }
 </script>

 <script>
 "use strict";

 var wtu = WebGLTestUtils;
 description("This test verifies the functionality of rendering to the same texture where it samples from.");

 var gl = wtu.create3DContext("example", undefined, 2);

 var width = 8;
 var height = 8;
 var tex0;
 var tex1;
 var tex2;
 var fbo;
 var program;
 var positionLoc;
 var texCoordLoc;

 if (!gl) {
     testFailed("WebGL context does not exist");
 } else {
     testPassed("WebGL context exists");

     init();
     detect_depth_stencil_feedback_loop();
     deinit();
 }

 function init() {
     // Setup program
     program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['aPosition', 'aTexCoord'], [0, 1]);
     positionLoc = gl.getAttribLocation(program, "aPosition");
     texCoordLoc = gl.getAttribLocation(program, "aTexCoord");
     if (!program || positionLoc < 0 || texCoordLoc < 0) {
         testFailed("Set up program failed");
         return;
     }
     testPassed("Set up program succeeded");

     wtu.setupUnitQuad(gl, 0, 1);
     gl.viewport(0, 0, width, height);

     var texLoc = gl.getUniformLocation(program, "tex");
     gl.uniform1i(texLoc, 0);

     // Create textures and allocate storage
     tex0 = gl.createTexture();
     tex1 = gl.createTexture();
     tex2 = gl.createTexture();
     wtu.fillTexture(gl, tex0, width, height, [0x0, 0xff, 0x0, 0xff], 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA);
     wtu.fillTexture(gl, tex1, width, height, [0x80], 0, gl.DEPTH_COMPONENT, gl.UNSIGNED_INT, gl.DEPTH_COMPONENT16);
     wtu.fillTexture(gl, tex2, width, height, [0x40], 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, gl.DEPTH24_STENCIL8);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Succeed to create textures.");

     fbo = gl.createFramebuffer();
     gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex0, 0);
 }

 function detect_depth_stencil_feedback_loop() {
     // Test rendering and sampling feedback loop for depth buffer
     gl.bindTexture(gl.TEXTURE_2D, tex1);
     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, tex1, 0);
     if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
         testFailed("Framebuffer incomplete.");
         return;
     }

     gl.enable(gl.DEPTH_TEST);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as depth buffer during rendering.");

     gl.depthMask(gl.FALSE);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test sampls from a image. The same image is used as depth buffer. But depth mask is false.");

     gl.depthMask(gl.TRUE);
     gl.disable(gl.DEPTH_TEST);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test samples from a image. The same image is used as depth buffer. But depth test is not enabled during rendering.");

     // Test rendering and sampling feedback loop for stencil buffer
     gl.bindTexture(gl.TEXTURE_2D, tex2);
     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, null, 0);
     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.TEXTURE_2D, tex2, 0);
     if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
         testFailed("Framebuffer incomplete.");
         return;
     }

     gl.enable(gl.STENCIL_TEST);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as stencil buffer during rendering.");

     gl.stencilMask(0x0);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test sampls from a image. The same image is used as stencil buffer. But stencil mask is zero.");

     gl.stencilMask(0xffff);
     gl.disable(gl.STENCIL_TEST);
     wtu.clearAndDrawUnitQuad(gl);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test samples from a image. The same image is used as stencil buffer. But stencil test is not enabled during rendering.");
 }

 function deinit() {
     gl.bindTexture(gl.TEXTURE_2D, null);
     gl.bindFramebuffer(gl.FRAMEBUFFER, null);
     gl.deleteTexture(tex0);
     gl.deleteTexture(tex1);
     gl.deleteTexture(tex2);
     gl.deleteFramebuffer(fbo);
 }

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

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

	/*
	** Copyright (c) 2016 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 Rendering and Sampling Feedback Loop Tests for Depth/Stencil 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>
	<canvas id="example" width="8" height="8"></canvas>
	<div id="description"></div>
	<div id="console"></div>

	<script id="vshader" type="x-shader/x-vertex">#version 300 es
	in highp vec4 aPosition;
	in vec2 aTexCoord;
	out vec2 texCoord;
	void main() {
	gl_Position = aPosition;
	texCoord = aTexCoord;
	}
	</script>

	<script id="fshader" type="x-shader/x-fragment">#version 300 es
	precision mediump float;
	uniform sampler2D tex;
	in vec2 texCoord;
	out vec4 oColor;
	void main() {
	oColor = texture(tex, texCoord);
	}
	</script>

	<script>
	"use strict";

	var wtu = WebGLTestUtils;
	description("This test verifies the functionality of rendering to the same texture where it samples from.");

	var gl = wtu.create3DContext("example", undefined, 2);

	var width = 8;
	var height = 8;
	var tex0;
	var tex1;
	var tex2;
	var fbo;
	var program;
	var positionLoc;
	var texCoordLoc;

	if (!gl) {
	testFailed("WebGL context does not exist");
	} else {
	testPassed("WebGL context exists");

	init();
	detect_depth_stencil_feedback_loop();
	deinit();
	}

	function init() {
	// Setup program
	program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['aPosition', 'aTexCoord'], [0, 1]);
	positionLoc = gl.getAttribLocation(program, "aPosition");
	texCoordLoc = gl.getAttribLocation(program, "aTexCoord");
	if (!program \|\| positionLoc < 0 \|\| texCoordLoc < 0) {
	testFailed("Set up program failed");
	return;
	}
	testPassed("Set up program succeeded");

	wtu.setupUnitQuad(gl, 0, 1);
	gl.viewport(0, 0, width, height);

	var texLoc = gl.getUniformLocation(program, "tex");
	gl.uniform1i(texLoc, 0);

	// Create textures and allocate storage
	tex0 = gl.createTexture();
	tex1 = gl.createTexture();
	tex2 = gl.createTexture();
	wtu.fillTexture(gl, tex0, width, height, [0x0, 0xff, 0x0, 0xff], 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA);
	wtu.fillTexture(gl, tex1, width, height, [0x80], 0, gl.DEPTH_COMPONENT, gl.UNSIGNED_INT, gl.DEPTH_COMPONENT16);
	wtu.fillTexture(gl, tex2, width, height, [0x40], 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, gl.DEPTH24_STENCIL8);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Succeed to create textures.");

	fbo = gl.createFramebuffer();
	gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
	gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex0, 0);
	}

	function detect_depth_stencil_feedback_loop() {
	// Test rendering and sampling feedback loop for depth buffer
	gl.bindTexture(gl.TEXTURE_2D, tex1);
	gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, tex1, 0);
	if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
	testFailed("Framebuffer incomplete.");
	return;
	}

	gl.enable(gl.DEPTH_TEST);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as depth buffer during rendering.");

	gl.depthMask(gl.FALSE);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test sampls from a image. The same image is used as depth buffer. But depth mask is false.");

	gl.depthMask(gl.TRUE);
	gl.disable(gl.DEPTH_TEST);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test samples from a image. The same image is used as depth buffer. But depth test is not enabled during rendering.");

	// Test rendering and sampling feedback loop for stencil buffer
	gl.bindTexture(gl.TEXTURE_2D, tex2);
	gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, null, 0);
	gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.TEXTURE_2D, tex2, 0);
	if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
	testFailed("Framebuffer incomplete.");
	return;
	}

	gl.enable(gl.STENCIL_TEST);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as stencil buffer during rendering.");

	gl.stencilMask(0x0);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test sampls from a image. The same image is used as stencil buffer. But stencil mask is zero.");

	gl.stencilMask(0xffff);
	gl.disable(gl.STENCIL_TEST);
	wtu.clearAndDrawUnitQuad(gl);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "The test samples from a image. The same image is used as stencil buffer. But stencil test is not enabled during rendering.");
	}

	function deinit() {
	gl.bindTexture(gl.TEXTURE_2D, null);
	gl.bindFramebuffer(gl.FRAMEBUFFER, null);
	gl.deleteTexture(tex0);
	gl.deleteTexture(tex1);
	gl.deleteTexture(tex2);
	gl.deleteFramebuffer(fbo);
	}

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

	</body>
	</html>