<html>
<head>
<script src="../../../resources/js-test.js"></script>
<script src="resources/webgl-test.js"></script>
<script src="resources/webgl-test-utils.js"></script>
</head>
<body>
<canvas id="testbed" width="16" height="16"></canvas>
<canvas id="c" width="16" height="16"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
description('Tests texSubImage2D with bad arguments');

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

var wtu = WebGLTestUtils;
var canvas = document.getElementById("testbed");
var c = document.getElementById("c");

var gl = wtu.create3DContext(canvas);
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.NO_ERROR, "Setup should succeed"); 

// FIXME: this behavior is still being discussed on the public_webgl mailing list and may
// need to be changed to throw TypeError because the argument is not nullable.
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 4, 4, gl.RGBA, gl.UNSIGNED_BYTE, null);
glErrorShouldBe(gl, gl.INVALID_VALUE, "null argument");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 1, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_VALUE, "y + height > texture height");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_VALUE, "x + width > texture width");
gl.texSubImage2D(gl.TEXTURE_2D, 0, -1, 0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_VALUE, "negative x");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, -1, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_VALUE, "negative y");
gl.texSubImage2D(gl.TEXTURE_2D, -1, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_VALUE, "negative level");
gl.texSubImage2D(gl.FLOAT, 0, 0,0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_ENUM, "bad target");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.NO_ERROR, "good args");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGB, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "format not same as original");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGBA, gl.UNSIGNED_SHORT_4_4_4_4, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "type not same as original");
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.NO_ERROR, "make texture RGB");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGB, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.NO_ERROR, "format same as original RGB");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "format not same as original RGB");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGB, gl.UNSIGNED_SHORT_5_6_5, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "type not same as original RGB");
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_SHORT_4_4_4_4, c);
glErrorShouldBe(gl, gl.NO_ERROR, "make texture RGBA 4_4_4_4");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGBA, gl.UNSIGNED_SHORT_4_4_4_4, c);
glErrorShouldBe(gl, gl.NO_ERROR, "format same as original RGBA 4_4_4_4");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGB, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "format not same as original RGBA 4_4_4_4");
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0,0, gl.RGBA, gl.UNSIGNED_BYTE, c);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "type not same as original RGBA 4_4_4_4");
</script>
</body>
</html>