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// This block needs to be outside the onload handler in order for this
// test to run reliably in WebKit's test harness (at least the
// Chromium port). https://bugs.webkit.org/show_bug.cgi?id=87448
if (window.initNonKhronosFramework) {
window.initNonKhronosFramework(true);
}
function generateTest(pixelFormat, pixelType, prologue) {
var wtu = WebGLTestUtils;
var gl = null;
var textureLoc = null;
var successfullyParsed = false;
var init = function()
{
description('Verify texImage2D and texSubImage2D code paths taking video elements (' + pixelFormat + '/' + pixelType + ')');
gl = wtu.create3DContext("example");
if (!prologue(gl)) {
finishTest();
return;
}
var program = wtu.setupTexturedQuad(gl);
gl.clearColor(0,0,0,1);
gl.clearDepth(1);
textureLoc = gl.getUniformLocation(program, "tex");
var video = document.getElementById("vid");
video.addEventListener(
"playing", function() { runTest(video); }, true);
video.loop = true;
video.play();
}
function runOneIteration(videoElement, useTexSubImage2D, flipY, topColor, bottomColor)
{
debug('Testing ' + (useTexSubImage2D ? 'texSubImage2D' : 'texImage2D') +
' with flipY=' + flipY);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
// Disable any writes to the alpha channel
gl.colorMask(1, 1, 1, 0);
var texture = gl.createTexture();
// Bind the texture to texture unit 0
gl.bindTexture(gl.TEXTURE_2D, texture);
// Set up texture parameters
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
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);
// Set up pixel store parameters
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, false);
// Upload the videoElement into the texture
if (useTexSubImage2D) {
// Initialize the texture to black first
gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat],
videoElement.videoWidth, videoElement.videoHeight, 0,
gl[pixelFormat], gl[pixelType], null);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl[pixelFormat], gl[pixelType], videoElement);
} else {
gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat], gl[pixelFormat], gl[pixelType], videoElement);
}
var c = document.createElement("canvas");
c.width = 16;
c.height = 16;
c.style.border = "1px solid black";
var ctx = c.getContext("2d");
ctx.drawImage(videoElement, 0, 0, 16, 16);
document.body.appendChild(c);
// Point the uniform sampler to texture unit 0
gl.uniform1i(textureLoc, 0);
// Draw the triangles
wtu.drawQuad(gl, [0, 0, 0, 255]);
// Check a few pixels near the top and bottom and make sure they have
// the right color.
debug("Checking lower left corner");
wtu.checkCanvasRect(gl, 4, 4, 2, 2, bottomColor,
"shouldBe " + bottomColor);
debug("Checking upper left corner");
wtu.checkCanvasRect(gl, 4, gl.canvas.height - 8, 2, 2, topColor,
"shouldBe " + topColor);
}
function runTest(videoElement)
{
var red = [255, 0, 0];
var green = [0, 255, 0];
runOneIteration(videoElement, false, true, red, green);
runOneIteration(videoElement, false, false, green, red);
runOneIteration(videoElement, true, true, red, green);
runOneIteration(videoElement, true, false, green, red);
glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
finishTest();
}
return init;
}
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