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<!--
Copyright (c) 2021 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">
<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>
<div id="console"></div>
<script>
"use strict";
description("This test verifies correct channel mapping of different PNG image types.");
const testData = {
"Grayscale": {
src: [
// [0x40]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAAAAAA6fptVAAAACklEQVQI12NwAAAAQgBBg7nsrQAAAABJRU5ErkJggg==",
// [0x4040]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABEAAAAABq7kcWAAAAC0lEQVQI12NwcAAAAMMAgUenLEIAAAAASUVORK5CYII="
],
expectations: [
{ color: [0x00, 0x00, 0x00, 0xFF], format: "ALPHA" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "RGB" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "RGBA" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "LUMINANCE" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "LUMINANCE_ALPHA" },
{ color: [0x40, 0x00, 0x00, 0xFF], format: "RED", internalformat: "R8" },
{ color: [0x40, 0x40, 0x00, 0xFF], format: "RG", internalformat: "RG8" }
]
},
"Grayscale Alpha": {
src: [
// [0x40, 0x80]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVQI12NwaAAAAQMAwUxZTl4AAAAASUVORK5CYII=",
// [0x4040, 0x8080]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABEAQAAADljNBBAAAADUlEQVQI12NwcGhoAAADRQGBoxssPgAAAABJRU5ErkJggg=="
],
expectations: [
{ color: [0x00, 0x00, 0x00, 0x80], format: "ALPHA" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "RGB" },
{ color: [0x40, 0x40, 0x40, 0x80], format: "RGBA" },
{ color: [0x40, 0x40, 0x40, 0xFF], format: "LUMINANCE" },
{ color: [0x40, 0x40, 0x40, 0x80], format: "LUMINANCE_ALPHA" },
{ color: [0x40, 0x00, 0x00, 0xFF], format: "RED", internalformat: "R8" },
{ color: [0x40, 0x40, 0x00, 0xFF], format: "RG", internalformat: "RG8" }
]
},
"Color": {
src: [
// [0xBF, 0x7F, 0xFF]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVQI12PYX/8fAAQ+Aj5BqwprAAAAAElFTkSuQmCC",
// [0xBFBF, 0x7F7F, 0xFFFF]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABEAIAAADA54+dAAAAD0lEQVQI12PYv7++/v9/AA6yBHvtbgBNAAAAAElFTkSuQmCC"
],
expectations: [
{ color: [0x00, 0x00, 0x00, 0xFF], format: "ALPHA" },
{ color: [0xBF, 0x7F, 0xFF, 0xFF], format: "RGB" },
{ color: [0xBF, 0x7F, 0xFF, 0xFF], format: "RGBA" },
{ color: [0xBF, 0xBF, 0xBF, 0xFF], format: "LUMINANCE" },
{ color: [0xBF, 0xBF, 0xBF, 0xFF], format: "LUMINANCE_ALPHA" },
{ color: [0xBF, 0x00, 0x00, 0xFF], format: "RED", internalformat: "R8" },
{ color: [0xBF, 0x7F, 0x00, 0xFF], format: "RG", internalformat: "RG8" }
]
},
"Color Alpha": {
src: [
// [0xBF, 0x7F, 0xFF, 0x40]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQI12PYX//fAQAGvAJ+xPMwKQAAAABJRU5ErkJggg==",
// [0xBFBF, 0x7F7F, 0xFFFF, 0x4040]
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABEAYAAABPhRjKAAAAEUlEQVQI12PYv7++/v9/BwcAGGgE+8YN4XUAAAAASUVORK5CYII="
],
expectations: [
{ color: [0x00, 0x00, 0x00, 0x40], format: "ALPHA" },
{ color: [0xBF, 0x7F, 0xFF, 0xFF], format: "RGB" },
{ color: [0xBF, 0x7F, 0xFF, 0x40], format: "RGBA" },
{ color: [0xBF, 0xBF, 0xBF, 0xFF], format: "LUMINANCE" },
{ color: [0xBF, 0xBF, 0xBF, 0x40], format: "LUMINANCE_ALPHA" },
{ color: [0xBF, 0x00, 0x00, 0xFF], format: "RED", internalformat: "R8" },
{ color: [0xBF, 0x7F, 0x00, 0xFF], format: "RG", internalformat: "RG8" }
]
}
};
const wtu = WebGLTestUtils;
const gl = wtu.create3DContext();
wtu.setupTexturedQuad(gl);
gl.bindTexture(gl.TEXTURE_2D, gl.createTexture());
(async () => {
for (const [type, testCase] of Object.entries(testData)) {
if (testCase.src.length != 2) throw new Error('testCase.src.length != 2');
let images = testCase.src.map(src => loadImage(src));
images = await Promise.all(images);
debug("");
debug("");
debug(`PNG image type ${type} with RGBA values of ${testCase.expectations[2].color}`);
let formats = testCase.expectations;
if (!wtu.isWebGL2(gl)) {
formats = formats.filter((f) => !f.internalformat);
}
for (const f of formats) {
debug("");
debug(`GL format: ${f.format}`);
function check(data, description) {
debug(`Upload ${description}`);
gl.texImage2D(
gl.TEXTURE_2D,
0,
gl[f.internalformat || f.format],
gl[f.format],
gl.UNSIGNED_BYTE,
data
);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, f.color, undefined, 1);
}
check(images[0].image, "8-bit PNG from Image");
check(images[1].image, "16-bit PNG from Image");
if (images[0].bitmap) {
check(images[0].bitmap, "8-bit PNG from ImageBitmap");
check(images[1].bitmap, "16-bit PNG from ImageBitmap");
}
}
}
finishTest();
})();
async function loadImage(src) {
const img = new Image();
img.src = src;
await img.decode();
const ret = { image: img };
if (self.createImageBitmap) {
try {
ret.bitmap = await createImageBitmap(img, {
premultiplyAlpha: "none",
});
} catch {}
}
return ret;
}
var successfullyParsed = true;
</script>
</body>
</html>
|
