mirror of
https://github.com/scratchfoundation/scratch-vm.git
synced 2024-12-24 06:52:40 -05:00
Move methods around to sort the public interface nearer the top
This commit is contained in:
Corey Frang
Michael "Z" Goddard
parent
992e884668
commit
e4bd9cf6b2
1 changed files with 149 additions and 144 deletions
293
src/io/video.js
293
src/io/video.js
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@ -120,44 +120,8 @@ class Video {
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}
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/**
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* Create a video stream.
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* Should probably be moved to -render or somewhere similar later
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* @private
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* @return {Promise} When video has been received, rejected if video is not received
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* Disable video stream (turn video off)
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*/
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_setupVideo () {
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if (this._singleSetup) {
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return this._singleSetup;
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}
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this._video = document.createElement('video');
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const video = new Promise((resolve, reject) => {
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navigator.getUserMedia({
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audio: false,
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video: {
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width: {min: 480, ideal: 640},
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height: {min: 360, ideal: 480}
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}
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}, stream => {
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this._video.src = window.URL.createObjectURL(stream);
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// Hint to the stream that it should load. A standard way to do this
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// is add the video tag to the DOM. Since this extension wants to
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// hide the video tag and instead render a sample of the stream into
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// the webgl rendered Scratch canvas, another hint like this one is
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// needed.
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this._track = stream.getTracks()[0];
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resolve(this._video);
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}, err => {
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// There are probably some error types we could handle gracefully here.
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this._singleSetup = null;
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reject(err);
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});
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});
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this._singleSetup = video.then(() => this._setupPreview());
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return this._singleSetup;
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}
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disableVideo () {
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this._disablePreview();
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this._singleSetup = null;
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@ -166,113 +130,6 @@ class Video {
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this._track = null;
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}
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_disablePreview () {
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if (this._skin && this._drawable) {
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this._skin.clear();
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this._drawable.updateProperties({visible: false});
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}
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this._renderPreviewFrame = null;
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}
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_setupPreview () {
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const {renderer} = this.runtime;
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if (!renderer) return;
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if (this._skinId === -1 && this._skin === null && this._drawable === -1) {
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this._skinId = renderer.createPenSkin();
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this._skin = renderer._allSkins[this._skinId];
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this._drawable = renderer.createDrawable();
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renderer.setDrawableOrder(
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this._drawable,
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Video.ORDER
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);
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renderer.updateDrawableProperties(this._drawable, {
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skinId: this._skinId
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});
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}
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// if we haven't already created and started a preview frame render loop, do so
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if (!this._renderPreviewFrame) {
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this._drawable.updateProperties({visible: true});
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this._renderPreviewFrame = () => {
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if (!this._renderPreviewFrame) {
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return;
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}
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setTimeout(this._renderPreviewFrame, this.runtime.currentStepTime);
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const canvas = this.getFrame({format: Video.FORMAT_CANVAS});
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if (!canvas) {
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return;
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}
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const xOffset = Video.DIMENSIONS[0] / -2;
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const yOffset = Video.DIMENSIONS[1] / 2;
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this._skin.drawStamp(canvas, xOffset, yOffset);
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this.runtime.requestRedraw();
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};
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this._renderPreviewFrame();
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}
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}
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/**
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* Set the preview ghost effect
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* @param {number} ghost from 0 (visible) to 100 (invisible) - ghost effect
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*/
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setPreviewGhost (ghost) {
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if (this._drawable) {
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this._drawable.updateProperties({ghost});
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}
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}
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get videoReady () {
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if (!this._video) {
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return false;
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}
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if (!this._track) {
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return false;
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}
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const {videoWidth, videoHeight} = this._video;
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if (typeof videoWidth !== 'number' || typeof videoHeight !== 'number') {
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return false;
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}
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if (videoWidth === 0 || videoHeight === 0) {
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return false;
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}
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return true;
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}
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/**
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* get an internal workspace for canvas/context/caches
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* this uses some document stuff to create a canvas and what not, probably needs abstraction
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* into the renderer layer?
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* @private
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* @return {object} A workspace for canvas/data storage. Internal format not documented intentionally
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*/
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_getWorkspace ({dimensions, mirror}) {
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let workspace = this._workspace.find(space => (
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space.dimensions.join('-') === dimensions.join('-') &&
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space.mirror === mirror
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));
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if (!workspace) {
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workspace = {
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dimensions,
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mirror,
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canvas: document.createElement('canvas'),
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lastUpdate: 0,
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cacheData: {}
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};
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workspace.canvas.width = dimensions[0];
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workspace.canvas.height = dimensions[1];
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workspace.context = workspace.canvas.getContext('2d');
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this._workspace.push(workspace);
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}
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return workspace;
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}
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/**
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* Return frame data from the video feed in a specified dimensions, format, and mirroring.
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* @return {ArrayBuffer|Canvas|string|null} Frame data in requested format, null when errors.
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@ -337,6 +194,154 @@ class Video {
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return formatCache.lastData;
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}
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/**
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* Set the preview ghost effect
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* @param {number} ghost from 0 (visible) to 100 (invisible) - ghost effect
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*/
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setPreviewGhost (ghost) {
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if (this._drawable) {
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this._drawable.updateProperties({ghost});
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}
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}
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/**
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* Create a video stream.
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* Should probably be moved to -render or somewhere similar later
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* @private
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* @return {Promise} When video has been received, rejected if video is not received
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*/
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_setupVideo () {
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if (this._singleSetup) {
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return this._singleSetup;
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}
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this._video = document.createElement('video');
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const video = new Promise((resolve, reject) => {
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navigator.getUserMedia({
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audio: false,
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video: {
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width: {min: 480, ideal: 640},
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height: {min: 360, ideal: 480}
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}
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}, stream => {
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this._video.src = window.URL.createObjectURL(stream);
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// Hint to the stream that it should load. A standard way to do this
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// is add the video tag to the DOM. Since this extension wants to
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// hide the video tag and instead render a sample of the stream into
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// the webgl rendered Scratch canvas, another hint like this one is
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// needed.
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this._track = stream.getTracks()[0];
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resolve(this._video);
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}, err => {
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// There are probably some error types we could handle gracefully here.
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this._singleSetup = null;
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reject(err);
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});
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});
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this._singleSetup = video.then(() => this._setupPreview());
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return this._singleSetup;
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}
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_disablePreview () {
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if (this._skin && this._drawable) {
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this._skin.clear();
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this._drawable.updateProperties({visible: false});
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}
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this._renderPreviewFrame = null;
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}
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_setupPreview () {
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const {renderer} = this.runtime;
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if (!renderer) return;
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if (this._skinId === -1 && this._skin === null && this._drawable === -1) {
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this._skinId = renderer.createPenSkin();
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this._skin = renderer._allSkins[this._skinId];
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this._drawable = renderer.createDrawable();
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renderer.setDrawableOrder(
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this._drawable,
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Video.ORDER
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);
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renderer.updateDrawableProperties(this._drawable, {
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skinId: this._skinId
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});
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}
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// if we haven't already created and started a preview frame render loop, do so
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if (!this._renderPreviewFrame) {
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this._drawable.updateProperties({visible: true});
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this._renderPreviewFrame = () => {
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if (!this._renderPreviewFrame) {
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return;
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}
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setTimeout(this._renderPreviewFrame, this.runtime.currentStepTime);
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const canvas = this.getFrame({format: Video.FORMAT_CANVAS});
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if (!canvas) {
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return;
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}
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const xOffset = Video.DIMENSIONS[0] / -2;
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const yOffset = Video.DIMENSIONS[1] / 2;
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this._skin.drawStamp(canvas, xOffset, yOffset);
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this.runtime.requestRedraw();
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};
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this._renderPreviewFrame();
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}
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}
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get videoReady () {
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if (!this._video) {
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return false;
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}
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if (!this._track) {
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return false;
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}
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const {videoWidth, videoHeight} = this._video;
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if (typeof videoWidth !== 'number' || typeof videoHeight !== 'number') {
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return false;
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}
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if (videoWidth === 0 || videoHeight === 0) {
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return false;
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}
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return true;
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}
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/**
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* get an internal workspace for canvas/context/caches
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* this uses some document stuff to create a canvas and what not, probably needs abstraction
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* into the renderer layer?
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* @private
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* @return {object} A workspace for canvas/data storage. Internal format not documented intentionally
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*/
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_getWorkspace ({dimensions, mirror}) {
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let workspace = this._workspace.find(space => (
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space.dimensions.join('-') === dimensions.join('-') &&
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space.mirror === mirror
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));
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if (!workspace) {
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workspace = {
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dimensions,
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mirror,
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canvas: document.createElement('canvas'),
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lastUpdate: 0,
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cacheData: {}
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};
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workspace.canvas.width = dimensions[0];
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workspace.canvas.height = dimensions[1];
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workspace.context = workspace.canvas.getContext('2d');
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this._workspace.push(workspace);
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}
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return workspace;
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}
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}
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