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Add gif -> video support

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This commit is contained in:
Andreas Krühlmann
2025-12-09 15:59:05 +01:00
parent d40b77c98f
commit 750cb227ff
8 changed files with 544 additions and 20 deletions
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22
src/main/java/com/imgfloat/app/model/Asset.java
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@@ -33,6 +33,8 @@ public class Asset {
private Double speed;
private Boolean muted;
private String mediaType;
private String originalMediaType;
private Integer zIndex;
private boolean hidden;
private Instant createdAt;
@@ -51,6 +53,7 @@ public class Asset {
this.rotation = 0;
this.speed = 1.0;
this.muted = false;
this.zIndex = 0;
this.hidden = false;
this.createdAt = Instant.now();
}
@@ -74,6 +77,9 @@ public class Asset {
if (this.muted == null) {
this.muted = Boolean.FALSE;
}
if (this.zIndex == null) {
this.zIndex = 0;
}
}
public String getId() {
@@ -168,6 +174,14 @@ public class Asset {
this.mediaType = mediaType;
}
public String getOriginalMediaType() {
return originalMediaType;
}
public void setOriginalMediaType(String originalMediaType) {
this.originalMediaType = originalMediaType;
}
public boolean isVideo() {
return mediaType != null && mediaType.toLowerCase(Locale.ROOT).startsWith("video/");
}
@@ -188,6 +202,14 @@ public class Asset {
this.createdAt = createdAt;
}
public Integer getZIndex() {
return zIndex == null ? 0 : zIndex;
}
public void setZIndex(Integer zIndex) {
this.zIndex = zIndex;
}
private static String normalize(String value) {
return value == null ? null : value.toLowerCase(Locale.ROOT);
}

9
src/main/java/com/imgfloat/app/model/TransformRequest.java
View File

@@ -8,6 +8,7 @@ public class TransformRequest {
private double rotation;
private Double speed;
private Boolean muted;
private Integer zIndex;
public double getX() {
return x;
@@ -64,4 +65,12 @@ public class TransformRequest {
public void setMuted(Boolean muted) {
this.muted = muted;
}
public Integer getZIndex() {
return zIndex;
}
public void setZIndex(Integer zIndex) {
this.zIndex = zIndex;
}
}

135
src/main/java/com/imgfloat/app/service/ChannelDirectoryService.java
View File

@@ -10,6 +10,7 @@ import com.imgfloat.app.repository.AssetRepository;
import com.imgfloat.app.repository.ChannelRepository;
import org.jcodec.api.FrameGrab;
import org.jcodec.api.JCodecException;
import org.jcodec.api.awt.AWTSequenceEncoder;
import org.jcodec.common.io.ByteBufferSeekableByteChannel;
import org.jcodec.common.model.Picture;
import org.slf4j.Logger;
@@ -21,21 +22,30 @@ import org.springframework.web.multipart.MultipartFile;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.URLConnection;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.util.Base64;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.IIOImage;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.ImageInputStream;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
@Service
public class ChannelDirectoryService {
private static final int MIN_GIF_DELAY_MS = 20;
private static final Logger logger = LoggerFactory.getLogger(ChannelDirectoryService.class);
private final ChannelRepository channelRepository;
private final AssetRepository assetRepository;
@@ -76,11 +86,11 @@ public class ChannelDirectoryService {
}
public Collection<Asset> getAssetsForAdmin(String broadcaster) {
return assetRepository.findByBroadcaster(normalize(broadcaster));
return sortByZIndex(assetRepository.findByBroadcaster(normalize(broadcaster)));
}
public Collection<Asset> getVisibleAssets(String broadcaster) {
return assetRepository.findByBroadcasterAndHiddenFalse(normalize(broadcaster));
return sortByZIndex(assetRepository.findByBroadcasterAndHiddenFalse(normalize(broadcaster)));
}
public CanvasSettingsRequest getCanvasSettings(String broadcaster) {
@@ -115,9 +125,11 @@ public class ChannelDirectoryService {
double width = optimized.width() > 0 ? optimized.width() : 640;
double height = optimized.height() > 0 ? optimized.height() : 360;
Asset asset = new Asset(channel.getBroadcaster(), name, dataUrl, width, height);
asset.setOriginalMediaType(mediaType);
asset.setMediaType(optimized.mediaType());
asset.setSpeed(1.0);
asset.setMuted(optimized.mediaType().startsWith("video/"));
asset.setZIndex(nextZIndex(channel.getBroadcaster()));
assetRepository.save(asset);
messagingTemplate.convertAndSend(topicFor(broadcaster), AssetEvent.created(broadcaster, asset));
@@ -134,6 +146,9 @@ public class ChannelDirectoryService {
asset.setWidth(request.getWidth());
asset.setHeight(request.getHeight());
asset.setRotation(request.getRotation());
if (request.getZIndex() != null) {
asset.setZIndex(request.getZIndex());
}
if (request.getSpeed() != null && request.getSpeed() > 0) {
asset.setSpeed(request.getSpeed());
}
@@ -200,6 +215,20 @@ public class ChannelDirectoryService {
return value == null ? null : value.toLowerCase();
}
private List<Asset> sortByZIndex(Collection<Asset> assets) {
return assets.stream()
.sorted(Comparator.comparingInt(Asset::getZIndex)
.thenComparing(Asset::getCreatedAt, Comparator.nullsFirst(Comparator.naturalOrder())))
.toList();
}
private int nextZIndex(String broadcaster) {
return assetRepository.findByBroadcaster(normalize(broadcaster)).stream()
.mapToInt(Asset::getZIndex)
.max()
.orElse(0) + 1;
}
private String detectMediaType(MultipartFile file, byte[] bytes) {
String contentType = Optional.ofNullable(file.getContentType()).orElse("application/octet-stream");
if (!"application/octet-stream".equals(contentType) && !contentType.isBlank()) {
@@ -230,6 +259,13 @@ public class ChannelDirectoryService {
}
private OptimizedAsset optimizeAsset(byte[] bytes, String mediaType) throws IOException {
if ("image/gif".equalsIgnoreCase(mediaType)) {
OptimizedAsset transcoded = transcodeGifToVideo(bytes);
if (transcoded != null) {
return transcoded;
}
}
if (mediaType.startsWith("image/") && !"image/gif".equalsIgnoreCase(mediaType)) {
BufferedImage image = ImageIO.read(new ByteArrayInputStream(bytes));
if (image == null) {
@@ -259,6 +295,99 @@ public class ChannelDirectoryService {
return null;
}
private OptimizedAsset transcodeGifToVideo(byte[] bytes) {
try {
List<GifFrame> frames = readGifFrames(bytes);
if (frames.isEmpty()) {
return null;
}
int baseDelay = frames.stream()
.mapToInt(frame -> normalizeDelay(frame.delayMs()))
.reduce(this::greatestCommonDivisor)
.orElse(100);
int fps = Math.max(1, (int) Math.round(1000.0 / baseDelay));
File temp = File.createTempFile("gif-convert", ".mp4");
temp.deleteOnExit();
try {
AWTSequenceEncoder encoder = AWTSequenceEncoder.createSequenceEncoder(temp, fps);
for (GifFrame frame : frames) {
int repeats = Math.max(1, normalizeDelay(frame.delayMs()) / baseDelay);
for (int i = 0; i < repeats; i++) {
encoder.encodeImage(frame.image());
}
}
encoder.finish();
BufferedImage cover = frames.get(0).image();
byte[] video = Files.readAllBytes(temp.toPath());
return new OptimizedAsset(video, "video/mp4", cover.getWidth(), cover.getHeight());
} finally {
Files.deleteIfExists(temp.toPath());
}
} catch (IOException e) {
logger.warn("Unable to transcode GIF to video", e);
return null;
}
}
private List<GifFrame> readGifFrames(byte[] bytes) throws IOException {
try (ImageInputStream stream = ImageIO.createImageInputStream(new ByteArrayInputStream(bytes))) {
var readers = ImageIO.getImageReadersByFormatName("gif");
if (!readers.hasNext()) {
return List.of();
}
ImageReader reader = readers.next();
try {
reader.setInput(stream, false, false);
int count = reader.getNumImages(true);
var frames = new java.util.ArrayList<GifFrame>(count);
for (int i = 0; i < count; i++) {
BufferedImage image = reader.read(i);
IIOMetadata metadata = reader.getImageMetadata(i);
int delay = extractDelayMs(metadata);
frames.add(new GifFrame(image, delay));
}
return frames;
} finally {
reader.dispose();
}
}
}
private int extractDelayMs(IIOMetadata metadata) {
if (metadata == null) {
return 100;
}
try {
String format = metadata.getNativeMetadataFormatName();
Node root = metadata.getAsTree(format);
NodeList children = root.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node node = children.item(i);
if ("GraphicControlExtension".equals(node.getNodeName()) && node.getAttributes() != null) {
Node delay = node.getAttributes().getNamedItem("delayTime");
if (delay != null) {
int hundredths = Integer.parseInt(delay.getNodeValue());
return Math.max(hundredths * 10, MIN_GIF_DELAY_MS);
}
}
}
} catch (Exception e) {
logger.warn("Unable to parse GIF delay", e);
}
return 100;
}
private int normalizeDelay(int delayMs) {
return Math.max(delayMs, MIN_GIF_DELAY_MS);
}
private int greatestCommonDivisor(int a, int b) {
if (b == 0) {
return Math.max(a, 1);
}
return greatestCommonDivisor(b, a % b);
}
private byte[] compressPng(BufferedImage image) throws IOException {
var writers = ImageIO.getImageWritersByFormatName("png");
if (!writers.hasNext()) {
@@ -299,5 +428,7 @@ public class ChannelDirectoryService {
private record OptimizedAsset(byte[] bytes, String mediaType, int width, int height) { }
private record GifFrame(BufferedImage image, int delayMs) { }
private record Dimension(int width, int height) { }
}

8
src/main/resources/static/css/styles.css
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@@ -172,6 +172,14 @@ body {
border-color: rgba(148, 163, 184, 0.2);
}
.badge-row {
display: flex;
gap: 8px;
flex-wrap: wrap;
align-items: center;
margin-top: 6px;
}
.feature-list {
list-style: none;
padding: 0;

226
src/main/resources/static/js/admin.js
View File

@@ -9,6 +9,7 @@ canvas.height = canvasSettings.height;
const assets = new Map();
const mediaCache = new Map();
const renderStates = new Map();
const animatedCache = new Map();
let selectedAssetId = null;
let interactionState = null;
let animationFrameId = null;
@@ -24,6 +25,8 @@ const speedInput = document.getElementById('asset-speed');
const muteInput = document.getElementById('asset-muted');
const selectedAssetName = document.getElementById('selected-asset-name');
const selectedAssetMeta = document.getElementById('selected-asset-meta');
const selectedZLabel = document.getElementById('asset-z-level');
const selectedTypeLabel = document.getElementById('asset-type-label');
const aspectLockState = new Map();
if (widthInput) widthInput.addEventListener('input', () => handleSizeInputChange('width'));
@@ -88,7 +91,7 @@ function renderAssets(list) {
function handleEvent(event) {
if (event.type === 'DELETED') {
assets.delete(event.assetId);
mediaCache.delete(event.assetId);
clearMedia(event.assetId);
renderStates.delete(event.assetId);
if (selectedAssetId === event.assetId) {
selectedAssetId = null;
@@ -107,7 +110,20 @@ function drawAndList() {
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
assets.forEach((asset) => drawAsset(asset));
getZOrderedAssets().forEach((asset) => drawAsset(asset));
}
function getZOrderedAssets() {
return Array.from(assets.values()).sort(zComparator);
}
function zComparator(a, b) {
const aZ = a?.zIndex ?? 0;
const bZ = b?.zIndex ?? 0;
if (aZ !== bZ) {
return aZ - bZ;
}
return new Date(a?.createdAt || 0) - new Date(b?.createdAt || 0);
}
function drawAsset(asset) {
@@ -119,10 +135,11 @@ function drawAsset(asset) {
ctx.rotate(renderState.rotation * Math.PI / 180);
const media = ensureMedia(asset);
const ready = media && (isVideoElement(media) ? media.readyState >= 2 : media.complete);
const drawSource = media?.isAnimated ? media.bitmap : media;
const ready = isDrawable(media);
if (ready) {
ctx.globalAlpha = asset.hidden ? 0.35 : 0.9;
ctx.drawImage(media, -halfWidth, -halfHeight, renderState.width, renderState.height);
ctx.drawImage(drawSource, -halfWidth, -halfHeight, renderState.width, renderState.height);
} else {
ctx.globalAlpha = asset.hidden ? 0.2 : 0.4;
ctx.fillStyle = 'rgba(124, 58, 237, 0.35)';
@@ -375,6 +392,47 @@ function isVideoElement(element) {
return element && element.tagName === 'VIDEO';
}
function getDisplayMediaType(asset) {
const raw = asset.originalMediaType || asset.mediaType || '';
if (!raw) {
return 'Unknown';
}
const parts = raw.split('/');
return parts.length > 1 ? parts[1].toUpperCase() : raw.toUpperCase();
}
function isGifAsset(asset) {
return (asset.mediaType && asset.mediaType.toLowerCase() === 'image/gif') || asset.url?.startsWith('data:image/gif');
}
function isDrawable(element) {
if (!element) {
return false;
}
if (element.isAnimated) {
return !!element.bitmap;
}
if (isVideoElement(element)) {
return element.readyState >= 2;
}
if (typeof ImageBitmap !== 'undefined' && element instanceof ImageBitmap) {
return true;
}
return !!element.complete;
}
function clearMedia(assetId) {
mediaCache.delete(assetId);
const animated = animatedCache.get(assetId);
if (animated) {
animated.cancelled = true;
clearTimeout(animated.timeout);
animated.bitmap?.close?.();
animated.decoder?.close?.();
animatedCache.delete(assetId);
}
}
function ensureMedia(asset) {
const cached = mediaCache.get(asset.id);
if (cached && cached.src === asset.url) {
@@ -382,6 +440,14 @@ function ensureMedia(asset) {
return cached;
}
if (isGifAsset(asset) && 'ImageDecoder' in window) {
const animated = ensureAnimatedImage(asset);
if (animated) {
mediaCache.set(asset.id, animated);
return animated;
}
}
const element = isVideoAsset(asset) ? document.createElement('video') : new Image();
if (isVideoElement(element)) {
element.loop = true;
@@ -400,6 +466,83 @@ function ensureMedia(asset) {
return element;
}
function ensureAnimatedImage(asset) {
const cached = animatedCache.get(asset.id);
if (cached && cached.url === asset.url) {
return cached;
}
if (cached) {
clearMedia(asset.id);
}
const controller = {
id: asset.id,
url: asset.url,
src: asset.url,
decoder: null,
bitmap: null,
timeout: null,
cancelled: false,
isAnimated: true
};
fetch(asset.url)
.then((r) => r.blob())
.then((blob) => new ImageDecoder({ data: blob, type: blob.type || 'image/gif' }))
.then((decoder) => {
if (controller.cancelled) {
decoder.close?.();
return null;
}
controller.decoder = decoder;
scheduleNextFrame(controller);
return controller;
})
.catch(() => {
animatedCache.delete(asset.id);
});
animatedCache.set(asset.id, controller);
return controller;
}
function scheduleNextFrame(controller) {
if (controller.cancelled || !controller.decoder) {
return;
}
controller.decoder.decode().then(({ image, complete }) => {
if (controller.cancelled) {
image.close?.();
return;
}
controller.bitmap?.close?.();
createImageBitmap(image)
.then((bitmap) => {
controller.bitmap = bitmap;
draw();
})
.finally(() => image.close?.());
const durationMicros = image.duration || 0;
const delay = durationMicros > 0 ? durationMicros / 1000 : 100;
const hasMore = !complete;
controller.timeout = setTimeout(() => {
if (controller.cancelled) {
return;
}
if (hasMore) {
scheduleNextFrame(controller);
} else {
controller.decoder.reset();
scheduleNextFrame(controller);
}
}, delay);
}).catch(() => {
animatedCache.delete(controller.id);
});
}
function applyMediaSettings(element, asset) {
if (!isVideoElement(element)) {
return;
@@ -429,9 +572,7 @@ function renderAssetList() {
return;
}
const sortedAssets = Array.from(assets.values()).sort(
(a, b) => new Date(b.createdAt || 0) - new Date(a.createdAt || 0)
);
const sortedAssets = getZOrderedAssets().reverse();
sortedAssets.forEach((asset) => {
const li = document.createElement('li');
li.className = 'asset-item';
@@ -449,7 +590,7 @@ function renderAssetList() {
const name = document.createElement('strong');
name.textContent = asset.name || `Asset ${asset.id.slice(0, 6)}`;
const details = document.createElement('small');
details.textContent = `${Math.round(asset.width)}x${Math.round(asset.height)} · ${asset.hidden ? 'Hidden' : 'Visible'}`;
details.textContent = `Z ${asset.zIndex ?? 0} · ${Math.round(asset.width)}x${Math.round(asset.height)} · ${getDisplayMediaType(asset)} · ${asset.hidden ? 'Hidden' : 'Visible'}`;
meta.appendChild(name);
meta.appendChild(details);
@@ -530,7 +671,13 @@ function updateSelectedAssetControls() {
controlsPanel.classList.remove('hidden');
lastSizeInputChanged = null;
selectedAssetName.textContent = asset.name || `Asset ${asset.id.slice(0, 6)}`;
selectedAssetMeta.textContent = `${Math.round(asset.width)}x${Math.round(asset.height)} · ${asset.hidden ? 'Hidden' : 'Visible'}`;
selectedAssetMeta.textContent = `Z ${asset.zIndex ?? 0} · ${Math.round(asset.width)}x${Math.round(asset.height)} · ${getDisplayMediaType(asset)} · ${asset.hidden ? 'Hidden' : 'Visible'}`;
if (selectedZLabel) {
selectedZLabel.textContent = asset.zIndex ?? 0;
}
if (selectedTypeLabel) {
selectedTypeLabel.textContent = getDisplayMediaType(asset);
}
if (widthInput) widthInput.value = Math.round(asset.width);
if (heightInput) heightInput.value = Math.round(asset.height);
@@ -618,6 +765,56 @@ function recenterSelectedAsset() {
drawAndList();
}
function bringForward() {
const asset = getSelectedAsset();
if (!asset) return;
const ordered = getZOrderedAssets();
const index = ordered.findIndex((item) => item.id === asset.id);
if (index === -1 || index === ordered.length - 1) return;
[ordered[index], ordered[index + 1]] = [ordered[index + 1], ordered[index]];
applyZOrder(ordered);
}
function bringBackward() {
const asset = getSelectedAsset();
if (!asset) return;
const ordered = getZOrderedAssets();
const index = ordered.findIndex((item) => item.id === asset.id);
if (index <= 0) return;
[ordered[index], ordered[index - 1]] = [ordered[index - 1], ordered[index]];
applyZOrder(ordered);
}
function bringToFront() {
const asset = getSelectedAsset();
if (!asset) return;
const ordered = getZOrderedAssets().filter((item) => item.id !== asset.id);
ordered.push(asset);
applyZOrder(ordered);
}
function sendToBack() {
const asset = getSelectedAsset();
if (!asset) return;
const ordered = getZOrderedAssets().filter((item) => item.id !== asset.id);
ordered.unshift(asset);
applyZOrder(ordered);
}
function applyZOrder(ordered) {
const changed = [];
ordered.forEach((item, index) => {
if ((item.zIndex ?? 0) !== index) {
item.zIndex = index;
changed.push(item);
}
assets.set(item.id, item);
renderStates.set(item.id, { ...item });
});
changed.forEach((item) => persistTransform(item, true));
drawAndList();
}
function getAssetAspectRatio(asset) {
const media = ensureMedia(asset);
if (isVideoElement(media) && media?.videoWidth && media?.videoHeight) {
@@ -726,11 +923,11 @@ function isPointOnAsset(asset, x, y) {
}
function findAssetAtPoint(x, y) {
const ordered = Array.from(assets.values()).reverse();
const ordered = getZOrderedAssets().reverse();
return ordered.find((asset) => isPointOnAsset(asset, x, y)) || null;
}
function persistTransform(asset) {
function persistTransform(asset, silent = false) {
fetch(`/api/channels/${broadcaster}/assets/${asset.id}/transform`, {
method: 'PUT',
headers: { 'Content-Type': 'application/json' },
@@ -741,11 +938,14 @@ function persistTransform(asset) {
height: asset.height,
rotation: asset.rotation,
speed: asset.speed,
muted: asset.muted
muted: asset.muted,
zIndex: asset.zIndex
})
}).then((r) => r.json()).then((updated) => {
assets.set(updated.id, updated);
drawAndList();
if (!silent) {
drawAndList();
}
});
}

143
src/main/resources/static/js/broadcast.js
View File

@@ -6,6 +6,7 @@ canvas.height = canvasSettings.height;
const assets = new Map();
const mediaCache = new Map();
const renderStates = new Map();
const animatedCache = new Map();
let animationFrameId = null;
function connect() {
@@ -51,14 +52,14 @@ function resizeCanvas() {
function handleEvent(event) {
if (event.type === 'DELETED') {
assets.delete(event.assetId);
mediaCache.delete(event.assetId);
clearMedia(event.assetId);
renderStates.delete(event.assetId);
} else if (event.payload && !event.payload.hidden) {
assets.set(event.payload.id, event.payload);
ensureMedia(event.payload);
} else if (event.payload && event.payload.hidden) {
assets.delete(event.payload.id);
mediaCache.delete(event.payload.id);
clearMedia(event.payload.id);
renderStates.delete(event.payload.id);
}
draw();
@@ -66,7 +67,20 @@ function handleEvent(event) {
function draw() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
assets.forEach(drawAsset);
getZOrderedAssets().forEach(drawAsset);
}
function getZOrderedAssets() {
return Array.from(assets.values()).sort(zComparator);
}
function zComparator(a, b) {
const aZ = a?.zIndex ?? 0;
const bZ = b?.zIndex ?? 0;
if (aZ !== bZ) {
return aZ - bZ;
}
return new Date(a?.createdAt || 0) - new Date(b?.createdAt || 0);
}
function drawAsset(asset) {
@@ -78,9 +92,10 @@ function drawAsset(asset) {
ctx.rotate(renderState.rotation * Math.PI / 180);
const media = ensureMedia(asset);
const ready = media && (isVideoElement(media) ? media.readyState >= 2 : media.complete);
const drawSource = media?.isAnimated ? media.bitmap : media;
const ready = isDrawable(media);
if (ready) {
ctx.drawImage(media, -halfWidth, -halfHeight, renderState.width, renderState.height);
ctx.drawImage(drawSource, -halfWidth, -halfHeight, renderState.width, renderState.height);
}
ctx.restore();
@@ -117,6 +132,38 @@ function isVideoElement(element) {
return element && element.tagName === 'VIDEO';
}
function isGifAsset(asset) {
return (asset.mediaType && asset.mediaType.toLowerCase() === 'image/gif') || asset.url?.startsWith('data:image/gif');
}
function isDrawable(element) {
if (!element) {
return false;
}
if (element.isAnimated) {
return !!element.bitmap;
}
if (isVideoElement(element)) {
return element.readyState >= 2;
}
if (typeof ImageBitmap !== 'undefined' && element instanceof ImageBitmap) {
return true;
}
return !!element.complete;
}
function clearMedia(assetId) {
mediaCache.delete(assetId);
const animated = animatedCache.get(assetId);
if (animated) {
animated.cancelled = true;
clearTimeout(animated.timeout);
animated.bitmap?.close?.();
animated.decoder?.close?.();
animatedCache.delete(assetId);
}
}
function ensureMedia(asset) {
const cached = mediaCache.get(asset.id);
if (cached && cached.src === asset.url) {
@@ -124,6 +171,14 @@ function ensureMedia(asset) {
return cached;
}
if (isGifAsset(asset) && 'ImageDecoder' in window) {
const animated = ensureAnimatedImage(asset);
if (animated) {
mediaCache.set(asset.id, animated);
return animated;
}
}
const element = isVideoAsset(asset) ? document.createElement('video') : new Image();
if (isVideoElement(element)) {
element.loop = true;
@@ -142,6 +197,84 @@ function ensureMedia(asset) {
return element;
}
function ensureAnimatedImage(asset) {
const cached = animatedCache.get(asset.id);
if (cached && cached.url === asset.url) {
return cached;
}
if (cached) {
clearMedia(asset.id);
}
const controller = {
id: asset.id,
url: asset.url,
src: asset.url,
decoder: null,
bitmap: null,
timeout: null,
cancelled: false,
isAnimated: true
};
fetch(asset.url)
.then((r) => r.blob())
.then((blob) => new ImageDecoder({ data: blob, type: blob.type || 'image/gif' }))
.then((decoder) => {
if (controller.cancelled) {
decoder.close?.();
return null;
}
controller.decoder = decoder;
scheduleNextFrame(controller);
return controller;
})
.catch(() => {
animatedCache.delete(asset.id);
});
animatedCache.set(asset.id, controller);
return controller;
}
function scheduleNextFrame(controller) {
if (controller.cancelled || !controller.decoder) {
return;
}
controller.decoder.decode().then(({ image, complete }) => {
if (controller.cancelled) {
image.close?.();
return;
}
controller.bitmap?.close?.();
createImageBitmap(image)
.then((bitmap) => {
controller.bitmap = bitmap;
draw();
})
.finally(() => image.close?.());
const durationMicros = image.duration || 0;
const delay = durationMicros > 0 ? durationMicros / 1000 : 100;
const hasMore = !complete;
controller.timeout = setTimeout(() => {
if (controller.cancelled) {
return;
}
if (hasMore) {
scheduleNextFrame(controller);
} else {
controller.decoder.reset();
scheduleNextFrame(controller);
}
}, delay);
}).catch(() => {
// If decoding fails, clear animated cache so static fallback is used next render
animatedCache.delete(controller.id);
});
}
function applyMediaSettings(element, asset) {
if (!isVideoElement(element)) {
return;

15
src/main/resources/templates/admin.html
View File

@@ -54,12 +54,27 @@
Muted (videos)
</label>
</div>
<div class="control-grid">
<label>
Layer (Z)
<div class="badge-row">
<span id="asset-z-level" class="badge">0</span>
<span id="asset-type-label" class="badge subtle"></span>
</div>
</label>
</div>
<div class="control-actions">
<button type="button" onclick="nudgeRotation(-5)" class="secondary">Rotate left</button>
<button type="button" onclick="nudgeRotation(5)" class="secondary">Rotate right</button>
<button type="button" onclick="applyTransformFromInputs()">Apply size</button>
<button type="button" onclick="recenterSelectedAsset()" class="secondary">Re-center asset</button>
</div>
<div class="control-actions">
<button type="button" onclick="sendToBack()" class="secondary">Send to back</button>
<button type="button" onclick="bringBackward()" class="secondary">Bring backward</button>
<button type="button" onclick="bringForward()" class="secondary">Bring forward</button>
<button type="button" onclick="bringToFront()" class="secondary">Bring to front</button>
</div>
</div>
</div>
</section>