<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL texture upload with FlipY and PremultiplyAlpha.</title>
<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
<script src="../../../js/js-test-pre.js"></script>
<script src="../../../js/webgl-test-utils.js"></script>
</head>
<body>
<canvas id="example" width="32" height="32" style="width: 40px; height: 40px;"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
// Regression test for crbug.com/765469
"use strict";
description("Checks uploading textures with FlipY and PremultiplyAlpha generates INVALID_OPERATION with invalid format/type");

var canvas;
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("example");

var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);

function testUpload() {
  // Because WEBGL_depth_texture is enabled, UNSIGNED_SHORT becomes a valid type, but RGBA/UNSIGNED_SHORT is invalid.
  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_SHORT, new Uint16Array(2*2*4));
  wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "texImage2D() with invalid format/type combination");
}

var ext = gl.getExtension('WEBGL_depth_texture');
if (ext) {
  debug("");
  debug("Testing with FlipY = false, PremultiplyAlpha = false");
  testUpload();

  debug("");
  debug("Testing with FlipY = true, PremultiplyAlpha = false");
  gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
  gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 0);
  testUpload();

  debug("");
  debug("Testing with FlipY = false, PremultiplyAlpha = true");
  gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 0);
  gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
  testUpload();

  debug("");
  debug("Testing with FlipY = true, PremultiplyAlpha = true");
  gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
  gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
  testUpload();
} else {
  testPassed("WEBGL_depth_texture not supported, skipping tests.");
}

gl.deleteTexture(tex);

debug("");
var successfullyParsed = true;
</script>
<script src="../../../js/js-test-post.js"></script>
</body>
</html>
