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/*
** Copyright (c) 2012 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.
*/

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<link rel="stylesheet" type="text/css" href="../unit.css" />
<script type="application/x-javascript" src="../unit.js"></script>
<script type="application/x-javascript" src="../util.js"></script>
<script type="application/x-javascript">

var verts = [0.0, 0.0, 0.0,   1.0, 0.0, 0.0,   0.0, 1.0, 0.0];
var normals = [0.0, 0.0, 1.0,   0.0, 0.0, 1.0,   0.0, 0.0, 1.0];
var texcoords = [0.0,0.0,  1.0,0.0,  0.0,1.0];

var vertsA = new Float32Array(verts);
var normalsA = new Float32Array(normals);
var texcoordsA = new Float32Array(texcoords);

Tests.startUnit = function () {
  var canvas = document.getElementById('gl');
  var gl = wrapGLContext(getGLContext(canvas));
  var prog = new Shader(gl, 'vert', 'frag');
  prog.use();
  var v = prog.attrib('Vertex');
  var n = prog.attrib('Normal');
  var t = prog.attrib('Tex');
  return [gl,prog,v,n,t];
}

Tests.setup = function(gl, prog, v,n,t) {
  return [gl, prog, v,n,t];
}
Tests.teardown = function(gl, prog, v,n,t) {
  gl.disableVertexAttribArray(v);
  gl.disableVertexAttribArray(n);
  gl.disableVertexAttribArray(t);
}

Tests.endUnit = function(gl, prog, v,n,t) {
  prog.destroy();
}

Tests.testDrawArraysEmpty = function(gl, prog, v,n,t) {
  var b = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, b);
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
  assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);})
  gl.enableVertexAttribArray(v);
  assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
  gl.deleteBuffer(b);
}

Tests.testDrawArraysOutOfBounds = function(gl, prog, v,n,t) {
  var b = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, b);
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
  assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);});
  gl.enableVertexAttribArray(v);
  assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
  assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
  assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000000000000",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
  assertGLError(gl, gl.INVALID_OPERATION, "zero size array fraction",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 1.6);});
  assertGLError(gl, gl.INVALID_VALUE, "negative offset",
      function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
  assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count",
      function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
  assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
      function(){gl.drawArrays(gl.TRIANGLES, -1, 1);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
      function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
  gl.deleteBuffer(b);
}


Tests.testDrawArraysWithDataOutOfBounds = function(gl, prog, v,n,t) {
  var b = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, b);
  gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  assertGLError(gl, gl.INVALID_OPERATION, "3 element array",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
  assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000000000000",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
  assertGLError(gl, gl.INVALID_OPERATION, "fractional count",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 1.6);});
  assertGLError(gl, gl.INVALID_VALUE, "negative offset",
      function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
  assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count",
      function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
  assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
      function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
      function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
  gl.deleteBuffer(b);
}

Tests.testDrawArraysMultiOutOfBounds = function(gl, prog, v,n,t) {
  var bs = [];
  bs.push(gl.createBuffer());
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
  gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  bs.push(gl.createBuffer());
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
  gl.bufferData(gl.ARRAY_BUFFER, normalsA, gl.STATIC_DRAW);
  gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
  bs.push(gl.createBuffer());
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
  gl.bufferData(gl.ARRAY_BUFFER, texcoordsA, gl.STATIC_DRAW);
  gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  gl.enableVertexAttribArray(n);
  gl.enableVertexAttribArray(t);
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 1",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  bs.push(gl.createBuffer());
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(verts.concat(verts)), gl.STATIC_DRAW);
  bs.push(gl.createBuffer());
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(texcoords.concat(texcoords)), gl.STATIC_DRAW);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
  gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
  gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  gl.enableVertexAttribArray(n);
  gl.enableVertexAttribArray(t);
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 2",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 3",
      function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
  gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
  gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  gl.enableVertexAttribArray(n);
  gl.enableVertexAttribArray(t);
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 4",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 5",
      function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
  gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[4]);
  gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  gl.enableVertexAttribArray(n);
  gl.enableVertexAttribArray(t);
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 6",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 7",
      function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
  gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
  gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
  gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  gl.enableVertexAttribArray(n);
  gl.enableVertexAttribArray(t);
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 8",
      function(){gl.drawArrays(gl.TRIANGLES, 4, 1);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count",
      function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "zero count???",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
  assertGLError(gl, gl.INVALID_OPERATION, "multi array 9",
      function(){gl.drawArrays(gl.TRIANGLES, 1, 4);});
  bs.forEach(function(b){ gl.deleteBuffer(b) });
}


Tests.testDrawArraysVBOOutOfBounds = function(gl, prog, v,n,t) {
  var vbo = new VBO(gl, {size:3, data:Quad.vertices});
  vbo.use(v);
  assertGLError(gl, gl.INVALID_OPERATION, "1",
      function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count",
      function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
  assertGLError(gl, gl.INVALID_OPERATION, "3",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
  assertGLError(gl, gl.INVALID_OPERATION, "4",
      function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
  vbo.destroy();
}

Tests.testDrawArraysVBOMultiOutOfBounds = function(gl, prog, v,n,t) {
  // creates VBOs for the quad arrays, binds them with
  // vertexAttribPointer and calls drawArrays
  var vbo = new VBO(gl,
    {size:3, data:Quad.vertices},
    {size:3, data:Quad.normals},
    {size:2, data:Quad.texcoords});
  vbo.use(v, n, t);
  assertGLError(gl, gl.INVALID_OPERATION, "1",
      function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
  assertGLError(gl, gl.INVALID_VALUE, "negative count",
      function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
  assertGLError(gl, gl.INVALID_OPERATION, "2",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
  assertGLError(gl, gl.INVALID_OPERATION, "3",
      function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
  vbo.destroy();
}

Tests.testDrawArraysOOBShaderJuggle = function(gl, prog, v,n,t) {
  var vbo = new VBO(gl,
    {size:3, data:[0,0,0]},
    {size:3, data:[0,0,0,0,0,0]});
  vbo.init();
  gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[0]);
  gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(v);
  assertGLError(gl, gl.INVALID_OPERATION, "offset too big",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
  var sh2 = new Shader(gl, 'vert', 'frag');
  sh2.use();
  gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[1]);
  gl.vertexAttribPointer(sh2.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(sh2.attrib('Vertex'));
  assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "offset too big 2",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
  prog.use();
  gl.vertexAttribPointer(prog.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
  gl.enableVertexAttribArray(prog.attrib('Vertex'));
  assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
  assertGLError(gl, gl.INVALID_OPERATION, "offset too big 3",
      function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
  sh2.destroy();
}

</script>
<script id="vert" type="x-shader/x-vertex">
  attribute vec3 Vertex;
  attribute vec3 Normal;
  attribute vec2 Tex;

  varying vec4 texCoord0;
  void main()
  {
    gl_Position = vec4(Vertex * Normal, 1.0);
    texCoord0 = vec4(Tex,0.0,0.0) + gl_Position;
  }
</script>
<script id="frag" type="x-shader/x-fragment">
  precision mediump float;

  varying vec4 texCoord0;
  void main()
  {
    gl_FragColor = texCoord0;
  }
</script>


<style>canvas{ position:absolute; }</style>
</head><body>
  <canvas id="gl" width="1" height="1"></canvas>
</body></html>