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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL Texture Format Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
<script src="../../resources/js-test-pre.js"></script>
<script src="../resources/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<canvas id="canvas2d" width="2" height="2" style="width: 50px; height: 50px; border: 1px solid black;"></canvas>
<canvas id="canvas" width="2" height="2" style="width: 100px; height:100px; border: 1px solid black;"> </canvas>
<script>
"use strict";
description("This test ensures WebGL implementations allow the OpenGL ES 2.0 texture formats and do not allow DesktopGL texture formats.");

debug("");
debug("Canvas.getContext");

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("canvas");
if (!gl) {
  testFailed("context does not exist");
} else {
  testPassed("context exists");

  debug("");
  debug("Checking texture formats.");

  var createTexture = function(internalFormat, format, opt_border) {
      var border = (opt_border === undefined) ? 0 : opt_border;
      var tex = gl.createTexture();
      gl.bindTexture(gl.TEXTURE_2D, tex);
      gl.texImage2D(gl.TEXTURE_2D,
                    0,                 // level
                    internalFormat,    // internalFormat
                    16,                // width
                    16,                // height
                    border,            // border
                    format,            // format
                    gl.UNSIGNED_BYTE,  // type
                    null);             // data
  }

  var testValidFormat = function(internalFormat, formatName) {
      createTexture(internalFormat, internalFormat);
      wtu.glErrorShouldBe(gl, gl.NO_ERROR,
                "was able to create texture of " + formatName);
  }

  var testInvalidFormat = function(internalFormat, formatName) {
      createTexture(internalFormat, internalFormat);
      var err = gl.getError();
      if (err == gl.NO_ERROR) {
          testFailed("should NOT be able to create texture of type " + formatName);
      } else if (err == gl.INVALID_OPERATION) {
          testFailed("should return gl.INVALID_ENUM for type " + formatName);
      } else if (err == gl.INVALID_ENUM) {
          testPassed("not able to create invalid format: " + formatName);
      }
  }

  var invalidEnums = [
    '1',
    '2',
    '3',
    '4',
    'RGB4',
    'RGB5',
    'RGB8',
    'RGB10',
    'RGB12',
    'RGB16',
    'RGBA2',
    'RGBA4',
    'RGB5_A1',
    'RGBA8',
    'RGB10_A2',
    'RGBA12',
    'RGBA16',
    'BGR',
    'BGRA',
    'ALPHA4_EXT',
    'ALPHA8_EXT',
    'ALPHA12_EXT',
    'ALPHA16_EXT',
    'COMPRESSED_ALPHA',
    'COMPRESSED_LUMINANCE',
    'COMPRESSED_LUMINANCE_ALPHA',
    'COMPRESSED_INTENSITY',
    'COMPRESSED_RGB',
    'COMPRESSED_RGBA',
    'DEPTH_COMPONENT16',
    'DEPTH_COMPONENT24',
    'DEPTH_COMPONENT32',
    'LUMINANCE4_EXT',
    'LUMINANCE8_EXT',
    'LUMINANCE12_EXT',
    'LUMINANCE16_EXT',
    'LUMINANCE4_ALPHA4_EXT',
    'LUMINANCE6_ALPHA2_EXT',
    'LUMINANCE8_ALPHA8_EXT',
    'LUMINANCE12_ALPHA4_EXT',
    'LUMINANCE12_ALPHA12_EXT',
    'LUMINANCE16_ALPHA16_EXT',
    'INTENSITY_EXT',
    'INTENSITY4_EXT',
    'INTENSITY8_EXT',
    'INTENSITY12_EXT',
    'INTENSITY16_EXT',
    'RGB4_EXT',
    'RGB5_EXT',
    'RGB8_EXT',
    'RGB10_EXT',
    'RGB12_EXT',
    'RGB16_EXT',
    'RGBA2_EXT',
    'RGBA4_EXT',
    'RGB5_A1_EXT',
    'RGBA8_EXT',
    'RGB10_A2_EXT',
    'RGBA12_EXT',
    'RGBA16_EXT',
    'SLUMINANCE_EXT',
    'SLUMINANCE8_EXT',
    'SLUMINANCE_ALPHA_EXT',
    'SLUMINANCE8_ALPHA8_EXT',
    'SRGB_EXT',
    'SRGB8_EXT',
    'SRGB_ALPHA_EXT',
    'SRGB8_ALPHA8'
  ];

  for (var ii = 0; ii < invalidEnums.length; ++ii) {
    var formatName = invalidEnums[ii]
    if (desktopGL[formatName] === undefined) {
      debug("bad format" + formatName)
    } else {
      testInvalidFormat(desktopGL[formatName], "GL_" + formatName);
    }
  }

  var validEnums = [
    'ALPHA',
    'RGB',
    'RGBA',
    'LUMINANCE',
    'LUMINANCE_ALPHA'
  ];

  for (var ii = 0; ii < validEnums.length; ++ii) {
    var formatName = validEnums[ii]
    testValidFormat(gl[formatName], "gl." + formatName);
  }

  debug("");
  debug("checking non 0 border parameter to gl.TexImage2D");
  createTexture(gl['RGBA'], gl['RGBA'], 1);
  wtu.glErrorShouldBe(gl, gl.INVALID_VALUE,
            "non 0 border to gl.TexImage2D should return INVALID_VALUE");


  var checkTypes = function() {
    var tex = gl.createTexture();
    gl.bindTexture(gl.TEXTURE_2D, tex);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);

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

    var checkType = function(r, g, b, a, type, format, buf) {
      var typeName = wtu.glEnumToString(gl, type);
      var formatName = wtu.glEnumToString(gl, format);
      var desc = "format: " + formatName + ", type: " + typeName;
      debug("");
      debug("checking gl.texImage2D with " + desc);
      gl.texImage2D(gl.TEXTURE_2D,
                    0,                 // level
                    format,            // internalFormat
                    2,                 // width
                    2,                 // height
                    0,                 // border
                    format,            // format
                    type,              // type
                    buf);              // data

      wtu.glErrorShouldBe(gl, gl.NO_ERROR,
                "gl.texImage2D with " + desc + " should generate NO_ERROR");

      wtu.clearAndDrawUnitQuad(gl, [255, 0, 0, 255]);
      wtu.checkCanvas(gl, [r,g,b,a],
                      "texture " + desc + " should draw with " +
                      r + ", " + g + ", " + b + ", " + a);

   }
   checkType(
       0, 255, 0, 255, gl.UNSIGNED_BYTE, gl.RGBA,
       new Uint8Array(
         [ 0, 255, 0, 255,
           0, 255, 0, 255,
           0, 255, 0, 255,
           0, 255, 0, 255]));
   checkType(
       0, 0, 255, 255, gl.UNSIGNED_SHORT_4_4_4_4, gl.RGBA,
       new Uint16Array(
         [ 255, 255,
           255, 255,
           255, 255,
           255, 255]));
   checkType(
       0, 255, 0, 255, gl.UNSIGNED_SHORT_5_6_5, gl.RGB,
       new Uint16Array(
         [ 2016, 2016,
           2016, 2016,
           2016, 2016,
           2016, 2016]));
   checkType(
       0, 0, 255, 255, gl.UNSIGNED_SHORT_5_5_5_1, gl.RGBA,
       new Uint16Array(
         [ 63, 63,
           63, 63,
           63, 63,
           63, 63]));
   checkType(
       255, 255, 255, 255, gl.UNSIGNED_BYTE, gl.LUMINANCE,
       new Uint8Array([
           255,
           255,
           255,
           255]));
   checkType(
       0, 0, 0, 128, gl.UNSIGNED_BYTE, gl.ALPHA,
       new Uint8Array([
           128,
           128,
           128,
           128]));
   checkType(
       128, 128, 128, 192, gl.UNSIGNED_BYTE, gl.LUMINANCE_ALPHA,
       new Uint8Array([
           128, 192,
           128, 192,
           128, 192,
           128, 192]));
  }
  var program = wtu.setupTexturedQuad(gl);
  gl.pixelStorei(gl.UNPACK_ALIGNMENT, 1);
  checkTypes();
}

debug("");
var successfullyParsed = true;

</script>
<script src="../../resources/js-test-post.js"></script>

</body>
</html>
