Support smartFilter (SoLd)

[scbizu]

TL;DR

This issue follows #72 , but not fully related . This thread focus on the discussion about the smartFilter parsing integration (and maybe the implementation ?) .

Background

As #72 mentioned , Currently , the parser do not support parse the smartFilter of the smartObject contains . Per Adobe PSD spec , all the smartObject layer data stores in SoLd(after Photoshop CS3) or PlLd (before Photoshop CS3) , because of the lack of detail explanation of SoLd.Variable , we should read the raw data and parse it by ... umm ... guessing ?

Attempts

Since I am not familiar with node ecosystem , I use the Go library to get the raw data (especially the SoLd section) . With the psd file, I got the following result:

click to show details

nullIdntTEXT%49b9a235-b7bb-534b-8a6a-747e80bf8949placedTEXT%97379f26-0cd7-5042-a0c8-6588da990816PgNmlong totalPageslongCroplong frameStepObjcnull numeratorlong denominatorlongdurationObjcnull numeratorlong denominatorlongX frameCountlongAnntlongTypelongTrnfVlLdoub{doubk`doub@ Xpdoubk`doub@ Xpdoub@Ldoub{doub@LnonAffineTransformVlLdoub{doubk`doub@ Xpdoubk`doub@ Xpdoub@Ldoub{doub@LSfilterFXStyleenabboolvalidAtPositionboolfilterMaskEnableboolfilterMaskLinkedboolfilterMaskExtendWithWhitebool filterFXListVlLsObjfilterFNm TEXTdcS_b blendOptionsObjc blendOptionsOpctUntF#Prc@YMd enumBlnMNrmlenabbool hasoptionsboolFrgCObjcRGBCRd doub@YGrn doub@T Bl doub@T BckCObjcRGBCRd doub@oGrn doub@oBl doub@oFltrObjcdcS_brigidTransform nullobj EnmrLyr OrdnTrgt rigidTypeboolpuppetShapeListVlLsObjc puppetShape rigidTypeboolVrsMlongVrsNlongoriginalVertexArraytdtaH_TY TN2&SS ËaOnfK|͇&GL�D`@At&B=B9#)BE5C0&s;C,Í_C0)*C$ Chf .C*ÕCHyCDDD3D2SDDDD}DDD~DIDDGDxDdحD#~DCD3KDʴDf^D!DfVDDLDD3CDnVD@D-#DDDDDCDCD`CDCD-CDtiCDCD4xCDTCDn1CD-FCDBDOBDKcBDDODD=/DaDKaäDbDb_DbèADbqnDb/DbDbDZcÌDcàDc`D3bæQDbÂƾDgbG;DbDYbù$D33b~D bZD9aD`D-`D`h `D`D`yDS^çpD_Ü9gD3^,]D4^RD3s^lHD33^ó D >D!]/Dj]R,#D]?DԷ]ÿ( D]Ñ%Cl]êCH]ùC']ïGC]{C]HyC ]ÉPC33]Í"CY]B]Bg]ÆA]kl3]g�]^~_ fZ>B=DVy�Di`D,DX{DAAw޶DAMyD? (`i91! gDlDDBSDDrDhD$ZeYBdCe±D!yK#D4D)+oDj*EVD~�uD=CC,Dh6dDChD-DX[D_BFDD#D:9AcD(6^6DyrDDxD杸D9DйDmDDlDDlDDDΣDDͣDӄDD)D^D0²"C˯fjC3Y C>v8DP2e,DDzDD6C!D'ÆkDCDCD%D}?@d׃CRDLCϺD@CD$% D2ӣDTM@YDU#DPDTDXDxDhD1DDDDD DDWDDD9D3DJCDE+£ >DD DD~4CDP=CD؞BDfDC?D DkXdC{SCF.y�L gCD)VDUDDtå D xD̘+BʻDqVD%DD ^>\D}D'3Ch~ D CX¨CWCw+g)D,\M?Bs/²DsDLM[CfD/BDD5D>eDCDD DܘnDD D=DNPDMWD>;C+D`|'C;D8D7CgDx!CCD_D;$BDIDlCϷD5!CoAD[9�D]"D퉋DAzDP!CaCfB#D80B`^DoBCɱAD>BCsm:DQD.DNDjJDLB2DWBOB>DYDB|DHBNA/BC:DDM7DY9CXCB@2]BD1D[DC FD(;DQC]Cıia(CFDC٤DD/DNDP?DwD.eDxBV٭CB.D[B&DgCMD1CDC[DCD[D`ֱDnB,CDCD&+C5DD DDD*CDDCD)DIDtC0DCڗDCӛD%CDs_xCjØD"D>DDsD85D6ʴD[HDXD'CHDNkD?8²Db!BD7#C@SD;D_jDD)WDDJDDg{DD(aDt4DIDnDYDD4YgDWDIDL"DЂDwrD$DH DKaC5-D'bA/N3D)BEDZC]ZCBfDB5JDBjfC'C8CCC)wCpCoD^D&DD,ͪD@Dm'DC:vDKDpDCCnD5GC?5DÀC|CSVDDyCD?"DxѼDDYDDDࠗBJDC$CD!CD4BtwDqm CDɋDC?DᜁC%xD OD~X{D#CDDI|C]"D Cb DJCn8CzC8DSD{D DæDFDDVd)D Db>D2gDKWD6DFDMzUD!C$DnC0?C?ND}ڝCoDZCJZ!DfAC| DCJD yCl DdD#DiDشÂlHDyÒQD)bZD+ dD!\mDv|vD#δ}~DOD٦�D�D|�pD4Cl4DT©qD@�9D(G/ţD-èD DCDgD HD' DD;DDDI$D#DDԈ,DBDb5D`D@>D'DGD>DPD؀D FD;IDDtDVmD?qD,͟&DaHpD(="Dk?QDyBDJBXD BD($C=DVRCdDC.DCZDeC?DCDgCQDqC YD5D{BbDO%D&kDDtsD2DV |Db`DDKCDD|+D2DDS%DD&vDDӘDeD=^DkD׾DV?Dpã6B!: B5,A`/*Vz#c%ü= ZÉsI'r ojãiaFyî0B:BDdݩ :Z߉DR`D@qL DWD̶A}DvBDplDDDDD& 0bD$COD35wDOwDV&eD(D hBDdf($CÏdÍC=#D &gDD??fD=*ʄDA DxDFBDϲ BDwDDD D @dldxǬDTDP4DkDrDXDaDDD#'DDkDPvD\DڔDsOB$k}hCWB CGC4FD%D WDjCDQC~D.ɖD@ADQ6C pDmC4ԿD/DDljDmDD4B D~DSD|Dt5D^DoD9DY߼D:#KD5DD>D7DZDDԃDVNJDD;SDnx�6DDD9D CD٘CUDgBiD7sD/ChD?'DA^BXZDXM "DBPAR!~DDBCLDED¾D̚%CfC"AsD|Dc3BD4bD0§D$"λD/DZD̓aC坴bAD8«ԸCoOClrDwiNL*L,ûRDÑC.�CDl`BIRDGD2rDD]׸C4DDD5gDZDFDoxD퓦DTDu_D&O0C]DRGCʨD' D{CXDlDC*BYDDٞPAD@D)DC �D?A$LDCBЙ@Dbfc)4DD@D:~DlVDp$DuA(ADmDD,C�BDCvDk @DpC9KC8@hBa"Z/D7DDLC:ED=DkC'C#A+bBsJDǦC ȢD٩DG3~D{hDDDWD5mpD~BC * �:D6gBDpCD"CCȞD1yCd DwDDDDE CxCD.CDCDfC#DDZƹD8tC[2DLC-DoC2Di$DkDdC;DVCuDJsCiĩD1C DbhCDDrD D5D1D~CC~C/$C�CRCCоDqrDxD'DQD|D}DkC.tDWLDIkqDpCsDCuDͱCnCbD"AfCADDD6eD}DFDD)>BYCtC0VCDBgD3CD$BtuCD CDK]DTDDTCIJDtCU cDD\D]tKD`xDH:DqfDQ/D$؂D/RD1ӍDBDGD00C0D$DnNDܱyD1IDYCt4D72DwjD@MDtRDiD^mdDԐDHlDlfCzD9Dr/Dp:DM.D2D\~D4D޳D+D ;DC4:/Dw DwCU(D|CMSDC6C.2C?mD]DugDtjDwDsdDd }DD indexArraytdta$`_`mn

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I compare the raw data with the SoLdDescriptor interface , I found that the filterFXList is missing , It seems that it contains the field: puppetShapeList, which contains a series of data streams (seems like some binary data) , I am stuck in reading this out , and ask here if you have some exps in reading this ?

Some Code Snippet

// The parse.go to parse the psd layer SoLd data 
package main

import (
	"fmt"
	"os"

	"github.com/oov/psd"
)

func main() {
	f, err := os.Open("resource/smart_filter.psd")
	if err != nil {
		panic(err)
	}
	// psd.Debug = log.New(os.Stdout, "psd: ", log.Lshortfile)
	p, _, err := psd.Decode(f, &psd.DecodeOptions{
		SkipLayerImage:  false,
		SkipMergedImage: false,
	})
	if err != nil {
		panic(err)
	}
	for _, l := range p.Layer {
		if l.Name == "组 5" {
			for _, ll := range l.Layer {
				if ll.Name == "qianpian" {
					for key, data := range ll.AdditionalLayerInfo {
						// fmt.Printf("key: %s\n", key)
						if key == "SoLd" {
							readRawData(data)
						}
					}
				}
			}
		}
	}
}

func readRawData(data []byte) {
	fmt.Printf("section len: %d\n", len(data))
	fmt.Printf("first 4 bytes[Identifier]: %v\n", string(data[:4]))
	data = data[4:]
	fmt.Printf("section len: %d\n", len(data))
	fmt.Printf("later 4 bytes[Version]: %#v\n", string(data[:4]))
	data = data[4:]
	fmt.Printf("section len: %d\n", len(data))
	fmt.Printf("later 4 bytes[Descriptor Version]: %#v\n", string(data[:4]))
	data = data[4:]
	fmt.Printf("section len: %d\n", len(data))
	fmt.Printf("later 4 bytes[Variable]: %v\n", string(data))
}

[Agamnentzar]

SoLd is actually smart object layer section, it doesn't contain smart filter data. Smart filter data in this file is in the FEid section.

[scbizu]

Ok , I will take a look at it

[scbizu]

@Agamnentzar Sorry to bother again , I read the spec and do some parsing stuff manually to the FEid but I still cannot get detail filter params .

Here is what I got:

• Version: 3
• Length: 540318
• Identifier: 97379f26-0cd7-5042-a0c8-6588da990816
• Version: 1
• Length: 5394183
• Rect: (-444,-222)-(1604,2006)
• Depth: 8
• MaxChannel: 24
  (Channel 0)
• Boolean: 1
• Length: 1908433
• CompressionMode: 3
• Data: (Channel 0 ImageData) <- (1908433 -2 ) bytes
  (Channel 1)
• Boolean: 1
• Length: 1784669
• CompressionMode: 3
• Data: (Channel 1 ImageData) <- (1784669 -2 ) bytes
  (Channel 2)
• Boolean: 1
• Length: 1689873
• CompressionMode: 3
• Data: (Channel 2 ImageData) <- (1689873 -2) bytes
  (Skip 88 bytes, IDK why)
  (UserMask)
• Boolean: 1
• Length: 11048
• CompressionMode: 3
• Data: (Mask ImageData)
  (Rest 8960 bytes cannot read)

I got the RGB image , but the image is just the image in smartObject layer , do not have any effect . If I change the smartFilter control points , there is nothing happened to the extract image from FEid , but if I re-put this psd into PS , it can read the changed control points , the real info is not stored in the FEid ? Any thoughts ?

(If you are interested in the parsing process code , I can share it with u , it is written in Go , so I not paste here)

[Agamnentzar]

I wrote parsing code like this, but for some reason it is ending up on the wrong byte after first filter entry, and the version is incorrect

		const version = readInt32(reader);
		if (version < 1 || version > 3) throw new Error(`Invalid filterEffects version ${version}`);

		if (readUint32(reader)) throw new Error('filterEffects: 64 bit length is not supported');
		const length = readUint32(reader);
		const end = reader.offset + length;

		while (reader.offset < end) {
			console.log('bytes to go', end - reader.offset, 'at', reader.offset.toString(16));
			//
			const id = readPascalString(reader, 1);
			const effectVersion = readInt32(reader);
			if (effectVersion !== 1) throw new Error(`Invalid filterEffect version ${effectVersion}`);
			if (readUint32(reader)) throw new Error('filterEffect: 64 bit length is not supported');
			const effectLength = readUint32(reader);
			const endOfEffect = reader.offset + effectLength;
			const top = readInt32(reader);
			const left = readInt32(reader);
			const bottom = readInt32(reader);
			const right = readInt32(reader);
			const depth = readInt32(reader);
			const maxChannels = readInt32(reader);
			const channels: any[] = [];

			for (let i = 0; i < (maxChannels + 2); i++) {
				const exists = readInt32(reader);
				if (exists) {
					if (readUint32(reader)) throw new Error('filterEffect: 64 bit length is not supported');
					const channelLength = readUint32(reader);
					const compressionMode = readUint16(reader);
					const data = readBytes(reader, channelLength - 2);
					channels.push({ channelLength, compressionMode, data: data?.length + ' bytes' });
				} else {
					channels.push(undefined);
				}
			}

			console.log('left at the end', endOfEffect - reader.offset);
			if (endOfEffect > reader.offset) {
				if (readUint8(reader)) {
					const compressionMode = readUint16(reader);
					const data = endOfEffect > reader.offset ? readBytes(reader, endOfEffect - reader.offset) : undefined;
					console.log('extra data', { compressionMode, data: data?.length + ' bytes' });
				} else {
					console.log('no extra');
				}
			}

			console.log('effect', {
				id,
				effectVersion,
				effectLength,
				top,
				left,
				bottom,
				right,
				depth,
				maxChannels,
				channels,
			});

			console.log('bytes left after effect', endOfEffect - reader.offset);
			// if (length % 4) skipBytes(reader, 4 - length % 4);
		}

		console.log({ version, length });

I don't really know where the control points might be stored, they should be somewhere here, but spec only mentions these RGB bitmap entries, so not sure where it would be. Could try diff on both files and check all sections that changed.

[scbizu]

@Agamnentzar Thank you , maybe I can help parsing the FEid here , but after read the parsing result , I think this section maybe useless (at least for extracting PuppetShape's Control Point) . As for I saw PuppetShape before in SoLd , I'd like to check SoLd again , and to see if I can make some progress.

[Agamnentzar]

@scbizu ok I found it, it is in SoLd section, I'll look into implementing it properly. It should be fine for reading, although I'm not sure if for writing the FEid section wouldn't have to be written correctly too, for the filter to work properly.

[scbizu]

Sounds awesome 👍 , today I do not have enough time to look at this , tomorrow I will try , thanks for inspiring me :)

[Agamnentzar]

Released version 15.3.0 with support for reading and writing smart layer filter. Might still have some issues but seems to work on test document.

[scbizu]

@Agamnentzar I see the PuppetShapeList now , so many args and hard to know actual though XD , seems hard to re-apply to other image use Canvas API

[Agamnentzar]

I think it mainly uses mesh of triangles that is being distorted, so it could probably be implemented with webgl, although the quality might not be the best then. I don't know what are most of the other parameters for, but maybe just for controlling the deformation UI.

[scbizu]

I found that those params maybe refers to the ARAP(A.K.A As-Rigid-As-Possible Shape Manipulation) , and the source paper is here .