add WIP simplified version
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Zellyn Hunter
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>WebGL port of OpenEmulator NTSC shader</title>
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<style>
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</style>
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<style>
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.wrapper {
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display: grid;
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grid-gap: 10px;
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grid-template-columns: auto 20em;
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}
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.controls {
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order: 2;
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}
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.screen {
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order: 1;
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}
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</style>
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</head>
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<body>
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<script src="screenEmu-simplified.js"></script>
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<div class="wrapper">
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<div class="controls">
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<form>
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<table>
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<tr>
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<td>Image</td>
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<td>
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<select id="input-image" class="input-image">
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</select>
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</td>
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</tr>
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<tr>
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<td> </td>
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<td></td>
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</tr>
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<tr>
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<td>Decoder</td>
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<td>
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Composite Y'UV
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</td>
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</tr>
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<tr>
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<td>Contrast</td>
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<td><input type="range" min="0" max="2" step="0.01" value="1" class="slider update" id="videoContrast"></td>
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</tr>
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<tr>
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<td>Saturation</td>
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<td><input type="range" min="0" max="2" step="0.01" value="1" class="slider update" id="videoSaturation"></td>
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</tr>
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<tr>
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<td>Hue</td>
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<td><input type="range" min="-0.5" max="0.5" step="0.01" value="0" class="slider update" id="videoHue"></td>
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</tr>
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<tr>
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<td>Horizontal Center</td>
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<td><input type="range" min="-0.1" max="0.1" step="0.01" value="0" class="slider update" id="videoHorizontalCenter"></td>
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</tr>
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<tr>
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<td>Horizontal Size</td>
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<td><input type="range" min="0.85" max="1.25" step="0.01" value="1.05" class="slider update" id="videoHorizontalSize"></td>
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</tr>
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<tr>
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<td>Vertical Center</td>
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<td><input type="range" min="-0.1" max="0.1" step="0.01" value="0" class="slider update" id="videoVerticalCenter"></td>
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</tr>
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<tr>
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<td>Vertical Size</td>
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<td><input type="range" min="0.85" max="1.25" step="0.01" value="1.05" class="slider update" id="videoVerticalSize"></td>
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</tr>
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<tr>
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<td>Luma Bandwidth</td>
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<td><input type="range" min="0" max="7159090" step="1" value="2000000" class="slider update" id="videoLumaBandwidth"></td>
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</tr>
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<tr>
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<td>Chroma Bandwidth</td>
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<td><input type="range" min="0" max="7159090" step="1" value="600000" class="slider update" id="videoChromaBandwidth"></td>
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</tr>
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<tr>
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<td> </td>
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<td></td>
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</tr>
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<tr>
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<td></td>
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<td><input type="reset" id="reset" value="Reset"></td>
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</tr>
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</table>
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</form>
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</div>
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<div class="screen">
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<canvas id="d" width="768" height="576"></canvas>
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</div>
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</div><!-- class="wrapper" -->
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<div class="notes">
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<p>
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This is a WebGL port by Zellyn Hunter of Marc S. Ressl's NTSC
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emulation from OpenEmulator. The source code is <a href="https://github.com/zellyn/apple2shader">here</a>.
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</p>
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<p>You can find out more about OpenEmulator at
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the <a href="http://openemulatorproject.github.io/">OpenEmulator
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project website</a>, or download
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a <a href="https://archive.org/details/OpenEmulatorSnapshots">recent
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build from the Internet Archive</a>, thanks to 4am.
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</p>
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</div>
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<script>
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function updateDisplayConfig(config) {
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config.videoContrast = Number(document.getElementById('videoContrast').value);
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config.videoSaturation = Number(document.getElementById('videoSaturation').value);
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config.videoHue = Number(document.getElementById('videoHue').value);
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config.videoCenter = new screenEmu.Point(
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Number(document.getElementById('videoHorizontalCenter').value),
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Number(document.getElementById('videoVerticalCenter').value)
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);
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config.videoSize = new screenEmu.Size(
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Number(document.getElementById('videoHorizontalSize').value),
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Number(document.getElementById('videoVerticalSize').value)
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);
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config.videoLumaBandwidth = Number(document.getElementById('videoLumaBandwidth').value);
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config.videoChromaBandwidth = Number(document.getElementById('videoChromaBandwidth').value);
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}
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async function setupScreenView() {
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const images = [ // path, title, DHGR
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["images/airheart-560x192.png", "Airheart", true ],
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["images/battle-chess.png", "Battle Chess", true ],
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["images/archon.png", "Archon", false],
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["images/archon-ii.png", "Archon II", false],
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["images/lode-runner.png", "Lode Runner", false],
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["images/championship-lode-runner.png", "Championship Lode Runner", false],
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["images/marty-reader.png", "Marty's Family Reader", true ],
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["images/bards-tale.png", "Bard's Tale", false],
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["images/dazzledraw-flower.png", "DazzleDraw flower", true ],
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["images/rescue-raiders-pic.png", "Rescue Raiders (a)", false],
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["images/rescue-raiders-words.png", "Rescue Raiders (b)", false],
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["images/ancient-legends.png", "Ancient Legends", false],
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["images/u5-shadowlords.png", "Ultima 5", false],
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["images/wild-things-3-2-1-contact.png", "Wild Things 3-2-1 Contact", false],
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["images/burger.png", "BURGER", false],
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];
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const image1 = await screenEmu.loadImage("images/airheart-560x192.png");
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const image2 = await screenEmu.loadImage("images/battle-chess.png");
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const image3 = await screenEmu.loadImage("images/archon.png");
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const image4 = await screenEmu.loadImage("images/archon-ii.png");
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const image5 = await screenEmu.loadImage("images/lode-runner.png");
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const image6 = await screenEmu.loadImage("images/marty-reader.png");
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const imsel = document.getElementById('input-image');
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for (let i = 0; i < images.length; i++) {
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const image = await screenEmu.loadImage(images[i][0]);
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images[i].push(image);
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const option = document.createElement("option");
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option.text = images[i][1];
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option.value = i;
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imsel.appendChild(option);
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}
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let canvas = document.getElementById("d");
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let sv = new screenEmu.ScreenView(canvas);
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await sv.initOpenGL();
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let displayConfig = new screenEmu.DisplayConfiguration();
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displayConfig.displayResolution = new screenEmu.Size(d.width, d.height);
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sv.displayConfiguration = displayConfig;
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update = () => {
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updateDisplayConfig(displayConfig);
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sv.displayConfiguration = displayConfig;
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sv.vsync();
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}
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for (const elem of document.getElementsByClassName('update')) {
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elem.onchange = update;
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}
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updateImage = () => {
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const index = Number(imsel.value);
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const [imageCanvas, imageData] = screenEmu.screenData(images[index][3],
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images[index][2]);
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let imageInfo = new screenEmu.ImageInfo(imageData);
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sv.image = imageInfo;
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sv.vsync();
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}
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updateImage();
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imsel.onchange = updateImage;
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document.getElementById('reset').onclick = () => {
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setTimeout(() => {
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update();
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updateImage();
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}, 0);
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}
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// sv.freeOpenGL();
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}
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setupScreenView();
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</script>
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</body>
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</html>
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