{"version":3,"file":"view-render-action.mjs","names":[],"sources":["../../src/actions/view-render-action.ts"],"sourcesContent":["import { createWriteStream } from 'node:fs';\n\nimport type { Command } from 'commander';\nimport gifenc from 'gifenc';\nimport sharp, { type Sharp } from 'sharp';\n\nimport { decompress, parseView } from '@4bitlabs/sci0';\nimport {\n createImageData,\n createPaletteFilter,\n padPixelsFilter,\n renderPixelData,\n} from '@4bitlabs/image';\nimport { loopPaddingFilter } from '@4bitlabs/sci0-renderer';\nimport { loadContentFromMap } from './load-content-from-map.js';\nimport { viewMatcher } from '../helpers/resource-matchers.js';\nimport { getRootOptions } from './get-root-options.js';\nimport {\n generatePalette,\n getScalerFromOptions,\n} from '../helpers/create-pic-pipeline.js';\nimport type { ScalerID } from '../models/render-pic-options.js';\n\nconst { GIFEncoder, quantize, applyPalette } = gifenc;\n\ntype Padding =\n | [number]\n | [number, number]\n | [number, number, number]\n | [number, number, number, number];\n\nconst hasPadding = (it: Padding | undefined): it is Padding => {\n return !(it?.every((v) => v === 0) ?? true);\n};\n\ninterface ViewRenderActionOptions {\n padding: Padding | undefined;\n animated: boolean;\n palette: 'cga' | 'true-cga' | 'dga';\n contrast: number;\n scaler: ScalerID;\n output: string;\n format: 'jpg' | 'png' | 'webp' | 'raw';\n grayscale: boolean;\n}\n\nconst FORMAT_MAPPING = {\n png: (source: Sharp) => source.png().toBuffer(),\n jpg: (source: Sharp) => source.jpeg().toBuffer(),\n webp: (source: Sharp) => source.webp().toBuffer(),\n raw: (source: Sharp) => source.raw().toBuffer(),\n};\n\nexport async function viewRenderAction(\n id: number,\n loopId: number,\n options: ViewRenderActionOptions,\n cmd: Command,\n) {\n const {\n format,\n animated,\n output = `view.${id.toString(10).padStart(3, '0')}-${loopId.toString(10)}.${format}`,\n } = options;\n const { root, engine } = getRootOptions(cmd);\n\n const [header, compressed] = await loadContentFromMap(root, viewMatcher(id));\n const viewData = decompress(engine, header.compression, compressed);\n const view = parseView(viewData);\n\n const loop = view[loopId];\n\n if (!loop)\n cmd.error(`Error: loop ${loopId} is not valid`, { code: 'INVALID_LOOP' });\n\n const backgroundColor = 0x00000000;\n\n const palette = generatePalette(options);\n const pipeline = {\n pre: [\n loopPaddingFilter(loop),\n hasPadding(options.padding) && padPixelsFilter(options.padding),\n ],\n render: createPaletteFilter(palette, { backgroundColor }),\n post: [getScalerFromOptions(options.scaler)],\n };\n\n const allFrames = loop.frames.map((frame) =>\n renderPixelData(frame, pipeline),\n );\n\n if (animated) {\n const gif = GIFEncoder();\n\n if (output !== '-' && !output.endsWith('.gif'))\n cmd.error('only .gif files are supported for animated output');\n\n allFrames.forEach(({ data, width, height }) => {\n const pal = quantize(data, 256, { format: 'rgba4444' });\n const index = applyPalette(data, pal, 'rgba4444');\n gif.writeFrame(index, width, height, { palette: pal, transparent: true });\n });\n gif.finish();\n\n if (output === '-') {\n process.stdout.write(gif.bytes());\n } else {\n await new Promise((yes, no) =>\n createWriteStream(output, { flags: 'w' }).write(\n gif.bytes(),\n (err: unknown) => {\n if (err) no(err);\n yes();\n },\n ),\n );\n }\n } else {\n const [totalWidth, totalHeight] = allFrames.reduce(\n ([prevW, prevH], imgData) => [\n Math.max(prevW, imgData.width),\n prevH + imgData.height,\n ],\n [0, 0],\n );\n\n const [compositeImage] = allFrames.reduce(\n ([sheet, offset], current) => {\n const { data, width, height } = current;\n const size = width * height * 4;\n sheet.data.set(data, offset);\n return [sheet, offset + size];\n },\n [createImageData(totalWidth, totalHeight), 0],\n );\n\n const image = sharp(compositeImage.data, {\n raw: {\n width: compositeImage.width,\n height: compositeImage.height,\n channels: 4,\n },\n });\n\n if (output === '-') {\n process.stdout.write(await FORMAT_MAPPING[format](image));\n } else {\n image.toFile(output);\n }\n 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