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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>WebGL CopyTexImage from/to the same texture Tests</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="64" height="64"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var wtu = WebGLTestUtils;
description("This test verifies CopyTexImage2D works if source/destination images belong to the same texture");
debug("");
var gl = wtu.create3DContext("example", undefined, 2);
function enumToString(value) {
return wtu.glEnumToString(gl, value);
}
function checkFramebuffer(expected) {
var actual = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
if (expected.indexOf(actual) < 0) {
var msg = "checkFramebufferStatus expects [";
for (var index = 0; index < expected.length; ++index) {
msg += wtu.glEnumToString(gl, expected[index]);
if (index + 1 < expected.length)
msg += ", ";
}
msg += "], was " + wtu.glEnumToString(gl, actual);
testFailed(msg);
} else {
var msg = "checkFramebufferStatus got " + wtu.glEnumToString(gl, actual) +
" as expected";
testPassed(msg);
}
}
function checkTextureLevelColor(texture, level, level_width, level_height, x, y, width, height, color) {
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var color_renderable_tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, color_renderable_tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, level_width, level_height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, color_renderable_tex, 0);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
var program = wtu.setupTexturedQuad(gl);
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, level);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAX_LEVEL, level);
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.REPEAT);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvasRect(gl, x, y, width, height, color);
gl.deleteTexture(color_renderable_tex);
gl.deleteFramebuffer(fbo);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Check texture level color should generate no GL errors.");
}
function testChangeTargetTextureLevelSize() {
debug("");
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var texture = gl.createTexture();
wtu.fillTexture(gl, texture, 64, 64, [255, 0, 0, 255], 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA8);
gl.generateMipmap(gl.TEXTURE_2D);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 1);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
// fbo source texture is |texture| level 1, 32x32. Target is |texture| level 2, 64x64.
// Only one quarter of the target 64x64 will come from the source.
// Implementations may insert internal commands before copying over 32x32 in order to
// initialize undefined three quarters to 0 as WebGL spec requires. This will actually create
// a 64x64 image at level 2 and make the fbo incomplete, thus, the copying will fail.
gl.copyTexImage2D(gl.TEXTURE_2D, 2, gl.RGBA8, 0, 0, 64, 64, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "copyTexImage2D should succeed.");
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT]);
checkTextureLevelColor(texture, 2, 64, 64, 0, 0, 32, 32, [255, 0, 0, 255]);
checkTextureLevelColor(texture, 2, 64, 64, 0, 32, 64, 32, [0, 0, 0, 0]);
checkTextureLevelColor(texture, 2, 64, 64, 32, 32, 32, 32, [0, 0, 0, 0]);
gl.deleteFramebuffer(fbo);
gl.deleteTexture(texture);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Test should generate no GL errors.");
}
function testChangeTargetTextureLevelFormat() {
debug("");
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
var texture = gl.createTexture();
wtu.fillTexture(gl, texture, 64, 64, [255, 0, 0, 255], 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA8);
gl.generateMipmap(gl.TEXTURE_2D);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 1);
checkFramebuffer([gl.FRAMEBUFFER_COMPLETE]);
// Using LUNIMANCE_ALPHA format may trigger implementations' emulation code path
// on desktop core profile GL, which might change level 2 image definition first
// and make the fbo incomplete, thus, the actual copying will fail.
gl.copyTexImage2D(gl.TEXTURE_2D, 2, gl.LUMINANCE_ALPHA, 0, 0, 16, 16, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "copyTexImage2D should succeed.");
checkFramebuffer([gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT]);
checkTextureLevelColor(texture, 2, 16, 16, 0, 0, 16, 16, [255, 255, 255, 255]);
gl.deleteFramebuffer(fbo);
gl.deleteTexture(texture);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Test should generate no GL errors.");
}
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
testChangeTargetTextureLevelSize();
testChangeTargetTextureLevelFormat();
}
var successfullyParsed = true;
</script>
<script src="../../../js/js-test-post.js"></script>
</body>
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