third_party/WebKit/LayoutTests/fast/canvas/webgl/texture-complete.html

   1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   2   "http://www.w3.org/TR/html4/loose.dtd">
   3 <html>
   4 <head>
   5 <title>WebGL "Texture Complete" texture conformance test.</title>
   6 <script src="../../../resources/js-test.js"></script>
   7 <script src="resources/webgl-test.js"> </script>
   8 </head>
   9 <body>
  10 <canvas id="example" width="40" height="40" style="width: 40px; height: 40px;"></canvas>
  11 <canvas id="canvas2d" width="16" height="16" style="width: 40px; height: 40px;"></canvas>
  12 <div id="description"></div>
  13 <div id="console"></div>
  14 <script id="vshader" type="x-shader/x-vertex">
  15 #ifdef GL_ES
  16 precision highp float;
  17 #endif
  18 attribute vec4 vPosition;
  19 attribute vec2 texCoord0;
  20 varying vec2 texCoord;
  21 void main()
  22 {
  23     gl_Position = vPosition;
  24     texCoord = texCoord0;
  25 }
  26 </script>
  27
  28 <script id="fshader" type="x-shader/x-fragment">
  29 #ifdef GL_ES
  30 precision highp float;
  31 #endif
  32 uniform sampler2D tex;
  33 varying vec2 texCoord;
  34 void main()
  35 {
  36     gl_FragColor = texture2D(tex, texCoord);
  37 }
  38 </script>
  39
  40 <script>
  41 function init()
  42 {
  43   if (window.initNonKhronosFramework) {
  44     window.initNonKhronosFramework(false);
  45   }
  46
  47   if (window.internals)
  48     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  49
  50   debug("Checks that a texture that is not -texture-complete- does not draw if"+
  51         " filtering needs mips");
  52   debug("");
  53
  54   var canvas2d = document.getElementById("canvas2d");
  55   var ctx2d = canvas2d.getContext("2d");
  56   ctx2d.fillStyle = "rgba(0,192,128,255)";
  57   ctx2d.fillRect(0, 0, 16, 16);
  58
  59   gl = initWebGL("example", "vshader", "fshader", [ "vPosition", "texCoord0"],
  60                  [ 0, 0, 0, 1 ], 1);
  61
  62   gl.disable(gl.DEPTH_TEST);
  63   gl.disable(gl.BLEND);
  64
  65   var vertexObject = gl.createBuffer();
  66   gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
  67   gl.bufferData(gl.ARRAY_BUFFER,
  68                 new Float32Array([ -1,1,0, 1,1,0, -1,-1,0,
  69                                    -1,-1,0, 1,1,0, 1,-1,0 ]),
  70                 gl.STATIC_DRAW);
  71   gl.enableVertexAttribArray(0);
  72   gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
  73
  74   var vertexObject = gl.createBuffer();
  75   gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
  76   gl.bufferData(gl.ARRAY_BUFFER,
  77                 new Float32Array([ 0,0, 1,0, 0,1,
  78                                    0,1, 1,0, 1,1 ]),
  79                 gl.STATIC_DRAW);
  80   gl.enableVertexAttribArray(1);
  81   gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);
  82
  83   var tex = gl.createTexture();
  84   gl.bindTexture(gl.TEXTURE_2D, tex);
  85   // 16x16 texture no mips
  86   gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas2d);
  87
  88   var loc = gl.getUniformLocation(gl.program, "tex");
  89   gl.uniform1i(loc, 0);
  90
  91   checkBuffer(0,0,0,255,
  92       "texture that is not -texture-complete- when " +
  93       "TEXTURE_MIN_FILTER not NEAREST or LINEAR should draw with 0,0,0,255");
  94
  95   function checkBuffer(r, g, b, a, msg) {
  96     gl.clearColor(1,1,1,1);
  97     gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  98     gl.drawArrays(gl.TRIANGLES, 0, 6);
  99     gl.flush();
 100     var buf = new Uint8Array(4 * 4 * 4);
 101     gl.readPixels(0, 0, 4, 4, gl.RGBA, gl.UNSIGNED_BYTE, buf);
 102     for (var i = 0; i < 4 * 4; ++i) {
 103       var offset = i * 4;
 104       if (buf[offset + 0] != r ||
 105           buf[offset + 1] != g ||
 106           buf[offset + 2] != b ||
 107           buf[offset + 3] != a) {
 108         debug('expected: ' + r + ', ' + g + ', ' + b + ', ' + a +
 109               ' was: ' +
 110               buf[offset + 0] + ', ' +
 111               buf[offset + 1] + ', ' +
 112               buf[offset + 2] + ', ' +
 113               buf[offset + 3]);
 114         testFailed(msg);
 115         return;
 116       }
 117     }
 118     testPassed(msg);
 119   }
 120 }
 121
 122 init();
 123 </script>
 124
 125
 126 </body>
 127 </html>
 128