dom/canvas/test/webgl-conf/checkout/conformance2/rendering/depth-stencil-feedback-loop.html

   1 <!--
   2 Copyright (c) 2019 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 -->
   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL Rendering and Sampling Feedback Loop Tests for Depth/Stencil Buffer</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/js-test-pre.js"></script>
  14 <script src="../../js/webgl-test-utils.js"></script>
  15 </head>
  16 <body>
  17 <canvas id="example" width="8" height="8"></canvas>
  18 <div id="description"></div>
  19 <div id="console"></div>
  20
  21 <script id="vshader" type="x-shader/x-vertex">#version 300 es
  22 in highp vec4 aPosition;
  23 in vec2 aTexCoord;
  24 out vec2 texCoord;
  25 void main() {
  26     gl_Position = aPosition;
  27     texCoord = aTexCoord;
  28 }
  29 </script>
  30
  31 <script id="fshader" type="x-shader/x-fragment">#version 300 es
  32 precision mediump float;
  33 uniform sampler2D tex;
  34 in vec2 texCoord;
  35 out vec4 oColor;
  36 void main() {
  37     oColor = texture(tex, texCoord);
  38 }
  39 </script>
  40
  41 <script>
  42 "use strict";
  43
  44 var wtu = WebGLTestUtils;
  45 description("This test verifies the functionality of rendering to the same texture where it samples from.");
  46
  47 var gl = wtu.create3DContext("example", undefined, 2);
  48
  49 var width = 8;
  50 var height = 8;
  51 var tex0;
  52 var tex1;
  53 var tex2;
  54 var fbo;
  55 var program;
  56 var positionLoc;
  57 var texCoordLoc;
  58
  59 if (!gl) {
  60     testFailed("WebGL context does not exist");
  61 } else {
  62     testPassed("WebGL context exists");
  63
  64     init();
  65     detect_depth_stencil_feedback_loop();
  66     deinit();
  67 }
  68
  69 function init() {
  70     // Setup program
  71     program = wtu.setupProgram(gl, ['vshader', 'fshader'], ['aPosition', 'aTexCoord'], [0, 1]);
  72     positionLoc = gl.getAttribLocation(program, "aPosition");
  73     texCoordLoc = gl.getAttribLocation(program, "aTexCoord");
  74     if (!program || positionLoc < 0 || texCoordLoc < 0) {
  75         testFailed("Set up program failed");
  76         return;
  77     }
  78     testPassed("Set up program succeeded");
  79
  80     wtu.setupUnitQuad(gl, 0, 1);
  81     gl.viewport(0, 0, width, height);
  82
  83     var texLoc = gl.getUniformLocation(program, "tex");
  84     gl.uniform1i(texLoc, 0);
  85
  86     // Create textures and allocate storage
  87     tex0 = gl.createTexture();
  88     tex1 = gl.createTexture();
  89     tex2 = gl.createTexture();
  90     wtu.fillTexture(gl, tex0, width, height, [0x0, 0xff, 0x0, 0xff], 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA);
  91     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  92     wtu.fillTexture(gl, tex1, width, height, [0x80], 0, gl.DEPTH_COMPONENT, gl.UNSIGNED_INT, gl.DEPTH_COMPONENT16);
  93     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  94     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  95     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_COMPARE_MODE, gl.COMPARE_REF_TO_TEXTURE);
  96     wtu.fillTexture(gl, tex2, width, height, [0x40], 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, gl.DEPTH24_STENCIL8);
  97     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  98     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  99     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_COMPARE_MODE, gl.COMPARE_REF_TO_TEXTURE);
 100     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Succeed to create textures.");
 101
 102     fbo = gl.createFramebuffer();
 103     gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
 104     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex0, 0);
 105 }
 106
 107 function detect_depth_stencil_feedback_loop() {
 108     // Test rendering and sampling feedback loop for depth buffer
 109     gl.bindTexture(gl.TEXTURE_2D, tex1);
 110     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, tex1, 0);
 111     if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
 112         testFailed("Framebuffer incomplete.");
 113         return;
 114     }
 115     gl.enable(gl.DEPTH_TEST);
 116     wtu.clearAndDrawUnitQuad(gl);
 117     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as depth buffer during rendering.");
 118
 119     gl.depthMask(gl.FALSE);
 120     wtu.clearAndDrawUnitQuad(gl);
 121     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as depth buffer. A feedback loop is formed regardless of the status of depth mask.");
 122
 123     gl.depthMask(gl.TRUE);
 124     gl.disable(gl.DEPTH_TEST);
 125     wtu.clearAndDrawUnitQuad(gl);
 126     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as depth buffer. A feedback loop is formed regardless of whether the depth test is enabled.");
 127
 128     // Test rendering and sampling feedback loop for stencil buffer
 129     gl.bindTexture(gl.TEXTURE_2D, tex2);
 130     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.TEXTURE_2D, null, 0);
 131     gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.TEXTURE_2D, tex2, 0);
 132     if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
 133         testFailed("Framebuffer incomplete.");
 134         return;
 135     }
 136
 137     gl.enable(gl.STENCIL_TEST);
 138     wtu.clearAndDrawUnitQuad(gl);
 139     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as stencil buffer during rendering.");
 140
 141     gl.stencilMask(0x0);
 142     wtu.clearAndDrawUnitQuad(gl);
 143     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test sampls from a image. The same image is used as stencil buffer. A feedback loop is formed regardless of the status of stencil mask.");
 144
 145     gl.stencilMask(0xffff);
 146     gl.disable(gl.STENCIL_TEST);
 147     wtu.clearAndDrawUnitQuad(gl);
 148     wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "The test samples from a image. The same image is used as stencil buffer. A feedback loop is formed regardless of whether the stencil test is enabled.");
 149 }
 150
 151 function deinit() {
 152     gl.bindTexture(gl.TEXTURE_2D, null);
 153     gl.bindFramebuffer(gl.FRAMEBUFFER, null);
 154     gl.deleteTexture(tex0);
 155     gl.deleteTexture(tex1);
 156     gl.deleteTexture(tex2);
 157     gl.deleteFramebuffer(fbo);
 158 }
 159
 160 var successfullyParsed = true;
 161 </script>
 162 <script src="../../js/js-test-post.js"></script>
 163
 164 </body>
 165 </html>