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<!--
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>CopyTexSubImage2D partial destination texture test</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>
<div id="description"></div>
<canvas id="canvas"></canvas>
<div id="console"></div>
<script>
"use strict";
description("Verifies that copyTexSubImage2D redefining part of the destination texture works as expected.");
////
var kWidth = 16;
var kHeight = 16;
////
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
canvas.width = kWidth;
canvas.height = kHeight;
var gl = wtu.create3DContext(canvas);
////
function clearTo(color) {
gl.clearColor(color[0], color[1], color[2], color[3]);
gl.clear(gl.COLOR_BUFFER_BIT);
}
function readInto(view) {
gl.readPixels(0, 0, kWidth, kHeight, gl.RGBA, gl.UNSIGNED_BYTE,
new Uint8Array(view.buffer));
}
////
function runTest() {
gl.enable(gl.SCISSOR_TEST);
gl.scissor(0, 0, kWidth/2, kHeight/2);
clearTo([1,0,0,1]);
gl.scissor(kWidth/2, 0, kWidth/2, kHeight/2);
clearTo([0,1,0,1]);
gl.scissor(0, kHeight/2, kWidth/2, kHeight/2);
clearTo([0,0,1,1]);
gl.scissor(kWidth/2, kHeight/2, kWidth/2, kHeight/2);
clearTo([0,1,1,1]);
var srcData = new Uint32Array(kWidth * kHeight);
readInto(srcData);
console.log('0x' + srcData[0].toString(16));
////
var dstTex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, dstTex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, kWidth, kHeight,
0, gl.RGBA, gl.UNSIGNED_BYTE, null); // Uploads zeros.
var dstRefData = new Uint32Array(kWidth * kHeight); // Also cleared to zeros!
var dstTestData = new Uint32Array(kWidth * kHeight);
var dstFB = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, dstFB);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0,
gl.TEXTURE_2D, dstTex, 0);
////
function pixelPos(x, y) {
return y * kWidth + x;
}
function testCmd(tuple) {
var dstX0, dstY0, srcX0, srcY0, width, height;
[dstX0, dstY0, srcX0, srcY0, width, height] = tuple
debug("copyTexSubImage2D(" +
[dstX0+','+dstY0, srcX0+','+srcY0, width+','+height].join(', ') +
")");
// Test
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.copyTexSubImage2D(gl.TEXTURE_2D, 0,
dstX0, dstY0, srcX0, srcY0, width, height);
// Emulate for reference
for (var x = 0; x < width; x++) {
var srcX = srcX0 + x;
var dstX = dstX0 + x;
if (srcX < 0 || srcX >= kWidth ||
dstX < 0 || dstX >= kWidth)
{
continue;
}
for (var y = 0; y < height; y++) {
var srcY = srcY0 + y;
var dstY = dstY0 + y;
if (srcY < 0 || srcY >= kHeight ||
dstY < 0 || dstY >= kHeight)
{
continue;
}
var srcPos = pixelPos(srcX, srcY);
var dstPos = pixelPos(dstX, dstY);
dstRefData[dstPos] = srcData[srcPos];
}
}
// Compare
gl.bindFramebuffer(gl.FRAMEBUFFER, dstFB);
readInto(dstTestData);
for (var x = 0; x < kWidth; x++) {
for (var y = 0; y < kHeight; y++) {
var pos = pixelPos(x, y);
var refPixel = dstRefData[pos];
var testPixel = dstTestData[pos];
//console.log([x, y].join(",") + ":",
// testPixel.toString(16), refPixel.toString(16))
if (testPixel == refPixel)
continue;
testFailed("Mismatch at (" + [x, y].join(", ") + "): " +
" Should be 0x" + refPixel.toString(16) +
", was 0x" + testPixel.toString(16));
return false;
}
}
return true;
}
var tests = [
[0,0, 0,0, 2,3],
[0,0, 5,8, 2,3],
[1,0, 0,0, 2,3],
[1,7, 0,0, 2,3],
];
tests.every(x => testCmd(x));
}
runTest();
debug("");
var successfullyParsed = true;
</script>
<script src="../../../js/js-test-post.js"></script>
</body>
</html>