f3c5c2d8f1
- Added support for new canvas node types: curves, color-adjust, light-adjust, detail-adjust, and render. - Implemented validation for adjustment nodes to restrict incoming edges to one. - Updated canvas connection validation to improve user feedback on invalid connections. - Enhanced node creation and rendering logic to accommodate new node types and their properties. - Refactored related components and utilities for better maintainability and performance.
49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
import type { PipelineStep } from "@/lib/image-pipeline/contracts";
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import { computeHistogram, type HistogramData } from "@/lib/image-pipeline/histogram";
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import { applyPipelineStep } from "@/lib/image-pipeline/render-core";
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import { loadSourceBitmap } from "@/lib/image-pipeline/source-loader";
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export type PreviewRenderResult = {
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width: number;
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height: number;
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imageData: ImageData;
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histogram: HistogramData;
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};
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export async function renderPreview(options: {
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sourceUrl: string;
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steps: readonly PipelineStep[];
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previewWidth: number;
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}): Promise<PreviewRenderResult> {
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const bitmap = await loadSourceBitmap(options.sourceUrl);
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const width = Math.max(1, Math.round(options.previewWidth));
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const height = Math.max(1, Math.round((bitmap.height / bitmap.width) * width));
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const canvas = document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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const context = canvas.getContext("2d", { willReadFrequently: true });
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if (!context) {
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throw new Error("Preview renderer could not create 2D context.");
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}
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context.drawImage(bitmap, 0, 0, width, height);
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const imageData = context.getImageData(0, 0, width, height);
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for (let index = 0; index < options.steps.length; index += 1) {
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applyPipelineStep(imageData.data, options.steps[index]!, width, height);
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await new Promise<void>((resolve) => {
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requestAnimationFrame(() => resolve());
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});
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}
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const histogram = computeHistogram(imageData.data);
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return {
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width,
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height,
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imageData,
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histogram,
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};
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}
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