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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import invariant from 'invariant';
import {Group} from 'pts';
import {EffectFrameContext} from './Effect';
export type MaskCanvas = {
maskCanvas: OffscreenCanvas;
bounds: number[][];
scaleX: number;
scaleY: number;
};
import {Effects} from '@/common/components/video/effects/Effects';
import type {CarbonIconType} from '@carbon/icons-react';
import {
AppleDash,
Asterisk,
Barcode,
CenterCircle,
ColorPalette,
ColorSwitch,
Development,
Erase,
FaceWink,
Humidity,
Image,
Overlay,
TextFont,
} from '@carbon/icons-react';
export type DemoEffect = {
title: string;
Icon: CarbonIconType;
effectName: keyof Effects;
};
export const backgroundEffects: DemoEffect[] = [
{title: 'Original', Icon: Image, effectName: 'Original'},
{title: 'Erase', Icon: Erase, effectName: 'EraseBackground'},
{
title: 'Gradient',
Icon: ColorPalette,
effectName: 'Gradient',
},
{
title: 'Pixelate',
Icon: Development,
effectName: 'Pixelate',
},
{title: 'Desaturate', Icon: ColorSwitch, effectName: 'Desaturate'},
{title: 'Text', Icon: TextFont, effectName: 'BackgroundText'},
{title: 'Blur', Icon: Humidity, effectName: 'BackgroundBlur'},
{title: 'Outline', Icon: AppleDash, effectName: 'Sobel'},
];
export const highlightEffects: DemoEffect[] = [
{title: 'Original', Icon: Image, effectName: 'Cutout'},
{title: 'Erase', Icon: Erase, effectName: 'EraseForeground'},
{title: 'Gradient', Icon: ColorPalette, effectName: 'VibrantMask'},
{title: 'Pixelate', Icon: Development, effectName: 'PixelateMask'},
{
title: 'Overlay',
Icon: Overlay,
effectName: 'Overlay',
},
{title: 'Emoji', Icon: FaceWink, effectName: 'Replace'},
{title: 'Burst', Icon: Asterisk, effectName: 'Burst'},
{title: 'Spotlight', Icon: CenterCircle, effectName: 'Scope'},
];
export const moreEffects: DemoEffect[] = [
{title: 'Noisy', Icon: Barcode, effectName: 'NoisyMask'},
];
// Store existing content in a temporary canvas
// This can be used in HighlightEffect composite blending, so that the existing background effect can be put back via "destination-over"
export function copyCanvasContent(
ctx: CanvasRenderingContext2D,
effectContext: EffectFrameContext,
): OffscreenCanvas {
const {width, height} = effectContext;
const previousContent = ctx.getImageData(0, 0, width, height);
const tempCanvas = new OffscreenCanvas(width, height);
const tempCtx = tempCanvas.getContext('2d');
tempCtx?.putImageData(previousContent, 0, 0);
return tempCanvas;
}
export function isInvalidMask(bound: number[][] | Group) {
return (
bound[0].length < 2 ||
bound[1].length < 2 ||
bound[1][0] - bound[0][0] < 1 ||
bound[1][1] - bound[0][1] < 1
);
}
export type MaskRenderingData = {
canvas: OffscreenCanvas;
scale: number[];
bounds: number[][];
};
export class EffectLayer {
canvas: OffscreenCanvas;
ctx: OffscreenCanvasRenderingContext2D;
width: number;
height: number;
constructor(context: EffectFrameContext) {
this.canvas = new OffscreenCanvas(context.width, context.height);
const ctx = this.canvas.getContext('2d');
invariant(ctx !== null, 'context cannot be null');
this.ctx = ctx;
this.width = context.width;
this.height = context.height;
}
image(source: CanvasImageSourceWebCodecs) {
this.ctx.drawImage(source, 0, 0);
}
filter(filterString: string) {
this.ctx.filter = filterString;
}
composite(blend: GlobalCompositeOperation) {
this.ctx.globalCompositeOperation = blend;
}
fill(color: string) {
this.ctx.fillStyle = color;
this.ctx.fillRect(0, 0, this.width, this.height);
}
clear() {
this.ctx.clearRect(0, 0, this.width, this.height);
}
}
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