mirror of
https://github.com/GoogleChromeLabs/squoosh.git
synced 2025-11-12 08:47:31 +00:00
WebP encode options (#110)
* Flailing * Holy shit struct binding * Options in the encoder! * Integrating webp options * Addressing feedback * This isn't needed anymore
This commit is contained in:
Jake Archibald
GitHub
@@ -1,3 +1,331 @@
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import qualityOption from '../generic/quality-option';
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import { h, Component } from 'preact';
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import { bind } from '../../lib/util';
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import { EncodeOptions, WebPImageHint } from './encoder';
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import * as styles from './styles.scss';
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export default qualityOption();
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type Props = {
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options: EncodeOptions,
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onChange(newOptions: EncodeOptions): void,
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};
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// From kLosslessPresets in config_enc.c
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// The format is [method, quality].
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const losslessPresets:[number, number][] = [
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[0, 0], [1, 20], [2, 25], [3, 30], [3, 50],
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[4, 50], [4, 75], [4, 90], [5, 90], [6, 100],
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];
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const losslessPresetDefault = 6;
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function determineLosslessQuality(quality: number): number {
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const index = losslessPresets.findIndex(item => item[1] === quality);
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if (index !== -1) return index;
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// Quality doesn't match one of the presets.
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// This can happen when toggling 'lossless'.
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return losslessPresetDefault;
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}
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/**
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* @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
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*/
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function fieldCheckedAsNumber(field: any): number {
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return Number((field as HTMLInputElement).checked);
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}
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/**
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* @param field An HTMLInputElement, but the casting is done here to tidy up onChange.
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*/
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function fieldValueAsNumber(field: any): number {
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return Number((field as HTMLInputElement).value);
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}
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export default class WebPEncoderOptions extends Component<Props, {}> {
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@bind
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onChange(event: Event) {
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const form = (event.currentTarget as HTMLInputElement).closest('form') as HTMLFormElement;
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const lossless = fieldCheckedAsNumber(form.lossless);
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const losslessPresetInput = (form.lossless_preset as HTMLInputElement);
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const options: EncodeOptions = {
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// Copy over options the form doesn't care about, eg emulate_jpeg_size
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...this.props.options,
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// And now stuff from the form:
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lossless,
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// Special-cased inputs:
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// In lossless mode, the quality is derived from the preset.
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quality: lossless ?
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losslessPresets[Number(losslessPresetInput.value)][1] :
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fieldValueAsNumber(form.quality),
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// In lossless mode, the method is derived from the preset.
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method: lossless ?
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losslessPresets[Number(losslessPresetInput.value)][0] :
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fieldValueAsNumber(form.method_input),
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image_hint: (form.image_hint as HTMLInputElement).checked ?
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WebPImageHint.WEBP_HINT_GRAPH :
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WebPImageHint.WEBP_HINT_DEFAULT,
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// .checked
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exact: fieldCheckedAsNumber(form.exact),
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alpha_compression: fieldCheckedAsNumber(form.alpha_compression),
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autofilter: fieldCheckedAsNumber(form.autofilter),
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filter_type: fieldCheckedAsNumber(form.filter_type),
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use_sharp_yuv: fieldCheckedAsNumber(form.use_sharp_yuv),
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// .value
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near_lossless: fieldValueAsNumber(form.near_lossless),
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alpha_quality: fieldValueAsNumber(form.alpha_quality),
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alpha_filtering: fieldValueAsNumber(form.alpha_filtering),
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sns_strength: fieldValueAsNumber(form.sns_strength),
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filter_strength: fieldValueAsNumber(form.filter_strength),
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filter_sharpness: fieldValueAsNumber(form.filter_sharpness),
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pass: fieldValueAsNumber(form.pass),
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preprocessing: fieldValueAsNumber(form.preprocessing),
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segments: fieldValueAsNumber(form.segments),
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partitions: fieldValueAsNumber(form.partitions),
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};
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this.props.onChange(options);
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}
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private _losslessSpecificOptions(options: EncodeOptions) {
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return (
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<div>
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<label>
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Effort:
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<input
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name="lossless_preset"
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type="range"
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min="0"
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max="9"
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value={'' + determineLosslessQuality(options.quality)}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Slight loss:
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<input
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class={styles.flipRange}
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name="near_lossless"
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type="range"
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min="0"
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max="100"
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value={'' + options.near_lossless}
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onChange={this.onChange}
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/>
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</label>
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<label>
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{/*
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Although there are 3 different kinds of image hint, webp only
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seems to do something with the 'graph' type, and I don't really
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understand what it does.
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*/}
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<input
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name="image_hint"
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type="checkbox"
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checked={options.image_hint === WebPImageHint.WEBP_HINT_GRAPH}
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value={'' + WebPImageHint.WEBP_HINT_GRAPH}
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onChange={this.onChange}
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/>
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Discrete tone image (graph, map-tile etc)
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</label>
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</div>
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);
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}
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private _lossySpecificOptions(options: EncodeOptions) {
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return (
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<div>
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<label>
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Effort:
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<input
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name="method_input"
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type="range"
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min="0"
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max="6"
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value={'' + options.method}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Quality:
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<input
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name="quality"
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type="range"
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min="0"
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max="100"
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step="0.01"
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value={'' + options.quality}
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onChange={this.onChange}
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/>
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</label>
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<label>
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<input
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name="alpha_compression"
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type="checkbox"
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checked={!!options.alpha_compression}
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onChange={this.onChange}
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/>
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Compress alpha
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</label>
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<label>
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Alpha quality:
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<input
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name="alpha_quality"
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type="range"
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min="0"
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max="100"
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value={'' + options.alpha_quality}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Alpha filter quality:
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<input
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name="alpha_filtering"
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type="range"
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min="0"
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max="2"
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value={'' + options.alpha_filtering}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Spacial noise shaping:
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<input
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name="sns_strength"
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type="range"
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min="0"
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max="100"
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value={'' + options.sns_strength}
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onChange={this.onChange}
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/>
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</label>
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<label>
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<input
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name="autofilter"
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type="checkbox"
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checked={!!options.autofilter}
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onChange={this.onChange}
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/>
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Auto adjust filter strength
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</label>
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<label>
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Filter strength:
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<input
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name="filter_strength"
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type="range"
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min="0"
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max="100"
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disabled={!!options.autofilter}
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value={'' + options.filter_strength}
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onChange={this.onChange}
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/>
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</label>
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<label>
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<input
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name="filter_type"
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type="checkbox"
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checked={!!options.filter_type}
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onChange={this.onChange}
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/>
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Strong filter
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</label>
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<label>
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Filter sharpness:
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<input
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class={styles.flipRange}
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name="filter_sharpness"
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type="range"
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min="0"
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max="7"
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value={'' + options.filter_sharpness}
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onChange={this.onChange}
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/>
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</label>
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<label>
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<input
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name="use_sharp_yuv"
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type="checkbox"
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checked={!!options.use_sharp_yuv}
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onChange={this.onChange}
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/>
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Sharp RGB->YUV conversion
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</label>
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<label>
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Passes:
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<input
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name="pass"
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type="range"
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min="1"
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max="10"
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value={'' + options.pass}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Preprocessing type:
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<select
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name="preprocessing"
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value={'' + options.preprocessing}
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onChange={this.onChange}
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>
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<option value="0">None</option>
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<option value="1">Segment smooth</option>
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<option value="2">Pseudo-random dithering</option>
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</select>
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</label>
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<label>
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Segments:
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<input
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name="segments"
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type="range"
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min="1"
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max="4"
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value={'' + options.segments}
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onChange={this.onChange}
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/>
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</label>
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<label>
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Partitions:
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<input
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name="partitions"
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type="range"
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min="0"
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max="3"
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value={'' + options.partitions}
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onChange={this.onChange}
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/>
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</label>
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</div>
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);
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}
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render({ options }: Props) {
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// I'm rendering both lossy and lossless forms, as it becomes much easier when
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// gathering the data.
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return (
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<form>
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<label>
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<input
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name="lossless"
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type="checkbox"
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checked={!!options.lossless}
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onChange={this.onChange}
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/>
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Lossless
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</label>
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<div class={options.lossless ? '' : styles.hide}>
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{this._losslessSpecificOptions(options)}
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</div>
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<div class={options.lossless ? styles.hide : ''}>
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{this._lossySpecificOptions(options)}
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</div>
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<label>
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<input
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name="exact"
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type="checkbox"
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checked={!!options.exact}
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onChange={this.onChange}
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/>
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Preserve transparent data. Otherwise, pixels with zero alpha will have RGB also zeroed.
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</label>
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</form>
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);
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}
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}
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