<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>WebGL uniform array Conformance Tests</title>
<script src="../../../resources/js-test.js"></script>
<script src="resources/webgl-test.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<canvas id="example" width="2" height="2"> </canvas>
<script id="vshader" type="x-shader/x-vertex">
    attribute vec4 vPosition;
    void main()
    {
        gl_Position = vPosition;
    }
</script>

<script id="fshader" type="x-shader/x-fragment">
    #ifdef GL_ES
    precision mediump float;
    #endif
    uniform $type color[3];
    void main()
    {
        gl_FragColor = vec4(color[0]$elem, color[1]$elem, color[2]$elem, 1);
    }
</script>
<script>
function loadShader(ctx, shaderType, shaderSource) {
  // Create the shader object
  var shader = ctx.createShader(shaderType);
  if (shader == null) {
    debug("*** Error: unable to create shader '"+shader+"'");
    return null;
  }

  // Load the shader source
  ctx.shaderSource(shader, shaderSource);

  // Compile the shader
  ctx.compileShader(shader);

  // Check the compile status
  var compiled = ctx.getShaderParameter(shader, ctx.COMPILE_STATUS);
  if (!compiled) {
    // Something went wrong during compilation; get the error
    var error = ctx.getShaderInfoLog(shader);
    debug("*** Error compiling shader '"+shader+"':"+error);
    ctx.deleteShader(shader);
    return null;
  }

  return shader;
}

function loadProgram(ctx, vertexShaderSrc, fragmentShaderSrc) {
  var program = ctx.createProgram();
  var vShader = loadShader(ctx, ctx.VERTEX_SHADER, vertexShaderSrc)
  var fShader = loadShader(ctx, ctx.FRAGMENT_SHADER, fragmentShaderSrc);
  ctx.attachShader(program, vShader);
  ctx.attachShader(program, fShader);
  ctx.linkProgram(program);
  var linked = ctx.getProgramParameter(program, ctx.LINK_STATUS);
  if (!linked) {
    // something went wrong with the link
    var error = ctx.getProgramInfoLog (ctx.program);
    debug("Error in program linking:" + error);
    ctx.deleteProgram(ctx.program);
    program = null;
  }
//  ctx.deleteShader(fShader);
//  ctx.deleteShader(vShader);
  return program;
}

description("This test ensures WebGL implementations handle uniform arrays correctly.");

debug("");

if (window.internals)
    window.internals.settings.setWebGLErrorsToConsoleEnabled(false);

var gl = create3DContext(document.getElementById("example"));

var vSrc = document.getElementById("vshader").text;
var fTemplate = document.getElementById("fshader").text;

var typeInfos = [
  { type: 'float',
    jsTypeOf: 'number',
    setter: 'uniform1fv',
    elem: '',
    numSrcValues: 3,
    invalidSet: function(loc) {
      gl.uniform2fv(loc, [1, 2]);
    },
    srcValueAsString: function(index, srcValues) {
      return srcValues[index].toString();
    },
    returnValueAsString: function(value) {
      return value === null ? 'null' : value.toString();
    },
    checkType: function(value) {
      return typeof value === 'number';
    },
    checkValue: function(typeInfo, index, value) {
      return typeInfo.srcValues[index] == value;
    },
    srcValues: [16, 15, 14],
    srcValuesLess: [],
    srcValuesNonMultiple: null,
  },
  { type: 'vec2',
    jsTypeOf: 'Float32Array',
    setter: 'uniform2fv',
    elem: '[1]',
    numSrcValues: 3,
    invalidSet: function(loc) {
      gl.uniform1fv(loc, [2]);
    },
    illegalSet: function(loc) {
      gl.uniform1fv(loc, 2);
    },
    srcValueAsString: function(index, srcValues) {
      return "[" + srcValues[index * 2 + 0].toString() + ", " +
                   srcValues[index * 2 + 1].toString() + "]";
    },
    returnValueAsString: function(value) {
      return value === null ? 'null' : ("[" + value[0] + ", " + value[1] + "]");
    },
    checkType: function(value) {
      return value &&
             typeof value.length === 'number' &&
             value.length == 2;
    },
    checkValue: function(typeInfo, index, value) {
      return value !== null &&
             typeInfo.srcValues[index * 2 + 0] == value[0] &&
             typeInfo.srcValues[index * 2 + 1] == value[1];
    },
    srcValues: [16, 15, 14, 13, 12, 11],
    srcValuesLess: [16],
    srcValuesNonMultiple: [16, 15, 14, 13, 12, 11, 10],
  },
  { type: 'vec3',
    jsTypeOf: 'Float32Array',
    setter: 'uniform3fv',
    elem: '[2]',
    numSrcValues: 3,
    invalidSet: function(loc) {
      gl.uniform1fv(loc, [2]);
    },
    illegalSet: function(loc) {
      gl.uniform1fv(loc, 2);
    },
    srcValueAsString: function(index, srcValues) {
      return "[" + srcValues[index * 3 + 0].toString() + ", " +
                   srcValues[index * 3 + 1].toString() + ", " +
                   srcValues[index * 3 + 2].toString() + "]";
    },
    returnValueAsString: function(value) {
      return value === null ? 'null' :
          ("[" + value[0] + ", " + value[1] + ", " + value[2] + "]");
    },
    checkType: function(value) {
      return value &&
             typeof value.length === 'number' &&
             value.length == 3;
    },
    checkValue: function(typeInfo, index, value) {
      return value !== null &&
             typeInfo.srcValues[index * 3 + 0] == value[0] &&
             typeInfo.srcValues[index * 3 + 1] == value[1] &&
             typeInfo.srcValues[index * 3 + 2] == value[2];
    },
    srcValues: [16, 15, 14, 13, 12, 11, 10, 9, 8],
    srcValuesLess: [16, 15],
    srcValuesNonMultiple: [16, 15, 14, 13, 12, 11, 10, 9, 8, 7],
  },
  { type: 'vec4',
    jsTypeOf: 'Float32Array',
    setter: 'uniform4fv',
    elem: '[3]',
    numSrcValues: 3,
    invalidSet: function(loc) {
      gl.uniform1fv(loc, [2]);
    },
    illegalSet: function(loc) {
      gl.uniform1fv(loc, 2);
    },
    srcValueAsString: function(index, srcValues) {
      return "[" + srcValues[index * 4 + 0].toString() + ", " +
                   srcValues[index * 4 + 1].toString() + ", " +
                   srcValues[index * 4 + 2].toString() + ", " +
                   srcValues[index * 4 + 3].toString() + "]";
    },
    returnValueAsString: function(value) {
      return value === null ? 'null' :
          ("[" + value[0] + ", " + value[1] +
           ", " + value[2] + ", " + value[3] + "]");
    },
    checkType: function(value) {
      return value &&
             typeof value.length === 'number' &&
             value.length == 4;
    },
    checkValue: function(typeInfo, index, value) {
      return value !== null &&
             typeInfo.srcValues[index * 4 + 0] == value[0] &&
             typeInfo.srcValues[index * 4 + 1] == value[1] &&
             typeInfo.srcValues[index * 4 + 2] == value[2] &&
             typeInfo.srcValues[index * 4 + 3] == value[3];
    },
    srcValues: [16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5],
    srcValuesLess: [16, 15, 14],
    srcValuesNonMultiple: [16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4],
  }
];

for (var tt = 0; tt < typeInfos.length; ++tt) {
  var typeInfo = typeInfos[tt];
  debug("");
  debug("check " + typeInfo.type);
  var fSrc = fTemplate.replace(/\$type/g, typeInfo.type).
                       replace(/\$elem/g, typeInfo.elem);
  //debug("fSrc: " + fSrc);
  var program = loadProgram(gl, vSrc, fSrc);

  var numUniforms = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);
  assertMsg(numUniforms == 1, "1 uniform found");
  var info = gl.getActiveUniform(program, 0);
  assertMsg(info.name == "color[0]",
            "uniform name is 'color[0]' not 'color' as per OpenGL ES 2.0.24 section 2.10");
  var loc = gl.getUniformLocation(program, "color[0]");
  var srcValues = typeInfo.srcValues;
  var srcValuesLess = typeInfo.srcValuesLess;
  var srcValuesNonMultiple = typeInfo.srcValuesNonMultiple;

  // Try setting the value before using the program
  gl[typeInfo.setter](loc, srcValues);
  glErrorShouldBe(gl, gl.INVALID_OPERATION,
                  "should fail if there is no current program");

  gl.useProgram(program);
  gl[typeInfo.setter](loc, srcValuesLess);
  glErrorShouldBe(gl, gl.INVALID_VALUE,
                  "should fail with insufficient array size with gl." + typeInfo.setter);
  if (srcValuesNonMultiple) {
    gl[typeInfo.setter](loc, srcValuesNonMultiple);
    glErrorShouldBe(gl, gl.INVALID_VALUE,
                    "should fail with non-multiple array size with gl." + typeInfo.setter);
  }
  gl[typeInfo.setter](loc, srcValues);
  glErrorShouldBe(gl, gl.NO_ERROR,
                  "can set an array of uniforms with gl." + typeInfo.setter);
  var values = gl.getUniform(program, loc);
  glErrorShouldBe(gl, gl.NO_ERROR,
                  "can call gl.getUniform");
  assertMsg(typeInfo.checkType(values),
            "gl.getUniform returns the correct type.");
  for (var ii = 0; ii < typeInfo.numSrcValues; ++ii) {
    var elemLoc = gl.getUniformLocation(program, "color[" + ii + "]");
    glErrorShouldBe(gl, gl.NO_ERROR,
                    "can get location of element " + ii +
                    " of array from gl.getUniformLocation");
    var value = gl.getUniform(program, elemLoc);
    glErrorShouldBe(gl, gl.NO_ERROR,
                    "can get value of element " + ii + " of array from gl.getUniform");
    assertMsg(typeInfo.checkValue(typeInfo, ii, value),
              "value put in (" + typeInfo.srcValueAsString(ii, srcValues) +
              ") matches value pulled out (" +
              typeInfo.returnValueAsString(value) + ")");
  }
  typeInfo.invalidSet(loc);
  glErrorShouldBe(gl, gl.INVALID_OPERATION,
                  "using the wrong size of gl.Uniform fails");
  var exceptionCaught = false;
  if (typeInfo.illegalSet) {
    try {
      typeInfo.illegalSet(loc);
    } catch (e) {
      exceptionCaught = true;
    }
    assertMsg(exceptionCaught, "passing non-array to glUniform*fv should throw TypeError");
  }

  gl.useProgram(null);
  glErrorShouldBe(gl, gl.NO_ERROR,
                  "can call gl.useProgram(null)");
}
debug("");

</script>
</body>
</html>