From 48d9e9fe2c95eebf33031fb41524d14d529b9c8d Mon Sep 17 00:00:00 2001
From: b <rowerynaksiezycu@gmail.com>
Date: Mon, 5 Dec 2022 22:28:34 +0000
Subject: [PATCH] palette tools online

---
 bluenh-cgi.c         |   2 -
 diff-cgi.c           |   2 -
 enhance-bottom.htm   |   2 +
 enhance.1.conf       |   1 +
 makefile             |  12 +-
 makefile.1.mak       |  12 +-
 nofading-cgi.c       |   4 +-
 npb-cgi.c            |   2 -
 online-core.1.h      |  13 +-
 pal-cgi.c            | 408 ++++++++++++++++++++++++++-----------------
 pal.1.htm            |  28 +--
 reveal-cgi.c         |   4 +-
 settings-release.txt |   1 +
 settings.txt         |  18 +-
 14 files changed, 294 insertions(+), 215 deletions(-)

diff --git a/bluenh-cgi.c b/bluenh-cgi.c
index b55cc8a..68d031b 100644
--- a/bluenh-cgi.c
+++ b/bluenh-cgi.c
@@ -114,8 +114,6 @@ int main (int argc, char *argv[])
 	}
 	r2 = rm(in_tmp);
 	r3 = rm(out_tmp);
-	if (r)
-		return r;
 	if (r1)
 		return r1;
 	if (r2)
diff --git a/diff-cgi.c b/diff-cgi.c
index 27a3267..90decf0 100644
--- a/diff-cgi.c
+++ b/diff-cgi.c
@@ -132,8 +132,6 @@ int main (int argc, char *argv[])
 	r2 = rm(in0_tmp);
 	r3 = rm(in1_tmp);
 	r4 = rm(out_tmp);
-	if (r)
-		return r;
 	if (r1)
 		return r1;
 	if (r2)
diff --git a/enhance-bottom.htm b/enhance-bottom.htm
index 9fca815..8055a00 100644
--- a/enhance-bottom.htm
+++ b/enhance-bottom.htm
@@ -1,5 +1,7 @@
 		<br>
 		Source code available at <a href="http://bicyclesonthemoon.info/git-projects/?p=ott/enhance">http://bicyclesonthemoon.info/git-projects/?p=ott/enhance</a>.<br>
 		Licensed under <a href="/a/agpl.txt">AGPL 3</a>.
+		<br><br>
+		<a href="/">1190.bicyclesonthemoon.info</a>
 	</body>
 </html>
diff --git a/enhance.1.conf b/enhance.1.conf
index 58eff10..58a2c9c 100644
--- a/enhance.1.conf
+++ b/enhance.1.conf
@@ -4,6 +4,7 @@ ScriptAlias /enhance/bluenh   ###CONF_bluenh;
 ScriptAlias /enhance/diff     ###CONF_diff;
 ScriptAlias /enhance/nofading ###CONF_nofading;
 ScriptAlias /enhance/npb      ###CONF_npb;
+ScriptAlias /enhance/pal      ###CONF_pal;
 ScriptAlias /enhance/reveal   ###CONF_reveal;
 
 <Directory ###CONF_bin;>
diff --git a/makefile b/makefile
index 8ae88dc..cc4fa89 100644
--- a/makefile
+++ b/makefile
@@ -110,28 +110,32 @@ nf.h\
 rvl.h\
 df.h\
 mpb.h\
-mpb_503.h
+mpb_503.h\
+nclr.h
 
 CGI=\
 bluenh-cgi\
 nofading-cgi\
 reveal-cgi\
 diff-cgi\
-npb-cgi
+npb-cgi\
+pal-cgi
 
 HTM_CGI=\
 bluenh.htm\
 nofading.htm\
 reveal.htm\
 diff.htm\
-npb.htm
+npb.htm\
+pal.htm
 
 HTM_CGI_1=\
 bluenh.1.htm\
 nofading.1.htm\
 reveal.1.htm\
 diff.1.htm\
-npb.1.htm
+npb.1.htm\
+pal.1.htm
 
 # keep these 2 lists in the same order!:
 GENERATE_FROM=\
diff --git a/makefile.1.mak b/makefile.1.mak
index 0736b7a..6ebb2c7 100644
--- a/makefile.1.mak
+++ b/makefile.1.mak
@@ -110,28 +110,32 @@ nf.h\
 rvl.h\
 df.h\
 mpb.h\
-mpb_503.h
+mpb_503.h\
+nclr.h
 
 CGI=\
 bluenh-cgi\
 nofading-cgi\
 reveal-cgi\
 diff-cgi\
-npb-cgi
+npb-cgi\
+pal-cgi
 
 HTM_CGI=\
 bluenh.htm\
 nofading.htm\
 reveal.htm\
 diff.htm\
-npb.htm
+npb.htm\
+pal.htm
 
 HTM_CGI_1=\
 bluenh.1.htm\
 nofading.1.htm\
 reveal.1.htm\
 diff.1.htm\
-npb.1.htm
+npb.1.htm\
+pal.1.htm
 
 # keep these 2 lists in the same order!:
 GENERATE_FROM=\
diff --git a/nofading-cgi.c b/nofading-cgi.c
index 1c3c410..f6f3483 100644
--- a/nofading-cgi.c
+++ b/nofading-cgi.c
@@ -1,7 +1,7 @@
 /*
 nofading-cgi.c
 The online interface for the fading enhancement tool
-04.12.2022
+05.12.2022
 
 Copyright (C) 2015, 2022  Balthasar Szczepański
 
@@ -92,8 +92,6 @@ int main (int argc, char *argv[])
 	}
 	r2 = rm(in_tmp);
 	r3 = rm(out_tmp);
-	if (r)
-		return r;
 	if (r1)
 		return r1;
 	if (r2)
diff --git a/npb-cgi.c b/npb-cgi.c
index 27049dd..855d85d 100644
--- a/npb-cgi.c
+++ b/npb-cgi.c
@@ -129,8 +129,6 @@ int main (int argc, char *argv[])
 	}
 	r2 = rm(in_tmp);
 	r3 = rm(out_tmp);
-	if (r)
-		return r;
 	if (r1)
 		return r1;
 	if (r2)
diff --git a/online-core.1.h b/online-core.1.h
index 46e935b..7342407 100644
--- a/online-core.1.h
+++ b/online-core.1.h
@@ -32,11 +32,14 @@ Requires cgilib (http://www.infodrom.org/projects/cgilib/)
 
 // ###C_TEMP_PATH: #define TEMP_PATH "/botm/tmp/enhance"
 
-// ###C_BLUENH_PATH:   #define NPB_PATH      "/botm/bin/bluenh"
-// ###C_DIFF_PATH:     #define DIFF_PATH     "/botm/bin/diff"
-// ###C_NOFADING_PATH: #define NOFADING_PATH "/botm/bin/nofading"
-// ###C_NPB_PATH:      #define NPB_PATH      "/botm/bin/npb"
-// ###C_REVEAL_PATH:   #define REVEAL_PATH   "/botm/bin/reveal"
+// ###C_BLUENH_PATH:      #define NPB_PATH         "/botm/bin/bluenh"
+// ###C_DIFF_PATH:        #define DIFF_PATH        "/botm/bin/diff"
+// ###C_NOFADING_PATH:    #define NOFADING_PATH    "/botm/bin/nofading"
+// ###C_NPB_PATH:         #define NPB_PATH         "/botm/bin/npb"
+// ###C_PAL_MIX_PATH:     #define PAL_MIX_PATH     "/botm/bin/pal_mix"
+// ###C_PAL_MIXDIFF_PATH: #define PAL_MIXDIFF_PATH "/botm/bin/pal_mixdiff"
+// ###C_PAL_UNMIX_PATH:   #define PAL_UNMIX_PATH   "/botm/bin/pal_unmix"
+// ###C_REVEAL_PATH:      #define REVEAL_PATH      "/botm/bin/reveal"
 
 int cp (char *src, char *dst);
 int wget (char *url, char *dst);
diff --git a/pal-cgi.c b/pal-cgi.c
index 0ffe0dc..0e7e401 100644
--- a/pal-cgi.c
+++ b/pal-cgi.c
@@ -1,206 +1,286 @@
-// insertframe.c
-// The online interface for the tools to insert and extract indexed images
-// 25.06.2015
-// 
-// Copyright (C) 2015  Balthasar Szczepański
-// 
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as
-// published by the Free Software Foundation, either version 3 of the
-// License, or (at your option) any later version.
-// 
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-// 
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-// 
+/*
+pal-cgi.c
+The online interface for the tools to insert and extract indexed images
+05.12.2022
 
-// Requires cgilib (http://www.infodrom.org/projects/cgilib/)
-        
-#include <cgi.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
+Copyright (C) 2015, 2022  Balthasar Szczepański
 
-#define WGET_PATH  "/usr/bin/wget"
-#define INS_PATH   "./insert"
-#define EXT_PATH   "./extract"
-#define DIF_PATH   "./seediff"
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
 
-#define RM_PATH    "/bin/rm"
-#define LOG_PATH   "/eizm/log/insertframe/insertframe.log"
-#define USERAGENT  "Hidden frames. (1190.bicyclesonthemoon.dnsd.info/insertframe/insertframe.htm)"
-#define MSTD_PATH  "/pro/insertframe/nclr.png"
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
 
-int main (int argc, char *argv[]);
-void mustard(int mustard);
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-FILE *pix;
-unsigned short act;
+Requires cgilib (http://www.infodrom.org/projects/cgilib/)
+*/
 
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+#include <cgi.h>
+
+#include "online-core.h"
+#include "nclr.h"
 
-char url0[1024];
-char path0[256];
-char url1[1024];
-char path1[256];
-s_cgi *cgi;
-int t;
-pid_t sub;
+#define INSERT     0
+#define EXTRACT_H  1
+#define EXTRACT_V  2
+#define DETECT     3
+#define MAX_ACTION DETECT
 
+int insert(
+	char *inpix0, char *inpix1, char *outpix,
+	uint_fast8_t r0, uint_fast8_t r1
+);
+int extract(
+	char *inpix, char *outpix0, char *outpix1,
+	uint_fast8_t size_defined,
+	uint_fast8_t p0, uint_fast8_t p1
+);
+int detect(
+	char *inpix, char *outpix,
+	uint_fast8_t size_defined,
+	uint_fast8_t p0, uint_fast8_t p1
+);
 
 int main (int argc, char *argv[])
 {
-	unsigned char buf[1024];
-	struct stat st;
-	unsigned long p, i;
-	unsigned short q;
-	char **up;
+	s_cgi *cgi;
+	char tmp0[256];
+	char tmp1[256];
+	char tmp2[256];
+	char *in0_path;
+	char *in1_path;
 	
-	// unsigned short r0, r1;
-	unsigned char n0=0;
-	unsigned char n1=0;
-
-	cgi=cgiInit();
+	char *t;
+	uint_fast8_t p0, p1;
+	uint_fast8_t size_defined = 0;
+	uint_fast8_t action;
 	
-	sprintf(path0,"%s",(cgiGetValue(cgi,"a")!=NULL)?(cgiGetValue(cgi,"a")):"0");
-	act=atoi(path0);
-	// sprintf(path0,"%s",(cgiGetValue(cgi,"r0")!=NULL)?(cgiGetValue(cgi,"r0")):"1");
-	// r0=atoi(path0);
-	// sprintf(path0,"%s",(cgiGetValue(cgi,"r1")!=NULL)?(cgiGetValue(cgi,"r1")):"0");
-	// r1=atoi(path0);
-
-	up=cgiGetFiles(cgi);
-	if (up)
-	{
-		if (cgiGetFile(cgi,up[0])!=NULL)
-		{
-			sprintf(path0,"%s",cgiGetFile(cgi,up[0])->tmpfile);
-			sprintf(url0,"%s",cgiGetFile(cgi,up[0])->filename);
-			n0=1;
-		}
-		if (cgiGetFile(cgi,up[1])!=NULL)
-		{
-			sprintf(path1,"%s",cgiGetFile(cgi,up[1])->tmpfile);
-			sprintf(url1,"%s",cgiGetFile(cgi,up[1])->filename);
-			n1=1;
-		}
-	}
+	int r=0;
+	int r1=0;
+	int r2=0;
+	int r3=0;
+	int r4=0;
 	
-	if(!n0)
-	{
-		sprintf(url0,"%s",(cgiGetValue(cgi,"inpix0")!=NULL)?(cgiGetValue(cgi,"inpix0")):"");
-		sprintf(path0,"/var/tmp/%lu_0",(unsigned long)getpid());
+	do {
+		make_tmp_path(tmp0, 256, 0, ".png");
+		make_tmp_path(tmp1, 256, 1, ".png");
+		make_tmp_path(tmp2, 256, 2, ".png");
+		
+		cgi=cgiInit();
+		
+		t = cgiGetValue(cgi, "a");
+		if (t != NULL)
+			sscanf(t,"%"SCNuFAST8, &action);
+		else
+			action = DETECT;
+		if (action > MAX_ACTION)
+			action = DETECT;
 		
-		sub=fork();
-		if(sub==0)
+		r = get_file(cgi,"inpixf0", tmp0, &in0_path);
+		if (r)
+			r = get_file(cgi,"inpix0", tmp0, &in0_path);
+		if (r)
+			break;
+		
+		if (action == INSERT)
 		{
-			t=execl(WGET_PATH,WGET_PATH,"-q","-t","2","-U",USERAGENT,"-O",path0,url0,(char *)0);
-			exit(t);
+			r = get_file(cgi,"inpixf1", tmp1, &in1_path);
+			if (r)
+				r = get_file(cgi,"inpix1", tmp1, &in1_path);
+			if (r)
+				break;
+			
+			t = cgiGetValue(cgi, "r0");
+			if (t != NULL)
+				sscanf(t,"%"SCNuFAST8, &p0);
+			else
+				p0 = 1;
+			
+			t = cgiGetValue(cgi, "r1");
+			if (t != NULL)
+				sscanf(t,"%"SCNuFAST8, &p1);
+			else
+				p1 = 0;
 		}
-		waitpid(sub,&t,0);
-		if(t)mustard(t);
-	}
-	
-	if(!n1)
-	{
-		sprintf(url1,"%s",(cgiGetValue(cgi,"inpix1")!=NULL)?(cgiGetValue(cgi,"inpix1")):"");
-		sprintf(path1,"/var/tmp/%lu_1",(unsigned long)getpid());
-		
-		if(!act)
+		else
 		{
-			sub=fork();
-			if(sub==0)
+			t = cgiGetValue(cgi, "p0");
+			if (t != NULL)
+			{
+				sscanf(t,"%"SCNuFAST8, &p0);
+				size_defined=1;
+			}
+			else
+				p0 = 0;
+			
+			t = cgiGetValue(cgi, "p1");
+			if (t != NULL)
 			{
-				t=execl(WGET_PATH,WGET_PATH,"-q","-t","2","-U",USERAGENT,"-O",path1,url1,(char *)0);
-				exit(t);
+				sscanf(t,"%"SCNuFAST8, &p1);
+				size_defined=1;
 			}
-			waitpid(sub,&t,0);
-			if(t)mustard(t);
+			else
+				p1 = 0;
 		}
-	}
-	
-	sub=fork();
-	if(sub==0)
-	{
-		switch (act)
+		
+		switch (action)
 		{
-		case 0:
-			t=execl(INS_PATH,INS_PATH,path0,path1,path0,(cgiGetValue(cgi,"r0")!=NULL)?(cgiGetValue(cgi,"r0")):"1",(cgiGetValue(cgi,"r1")!=NULL)?(cgiGetValue(cgi,"r1")):"0","q",(char *)0);
-			exit(t);
-		case 1:
-		case 2:
-			t=execl(EXT_PATH,EXT_PATH,path0,path0,path1,"q",(char *)0);
-			exit(t);
-		case 3:
-			t=execl(DIF_PATH,DIF_PATH,path0,path0,"q",(char *)0);
-			exit(t);
-		default:
-			exit(act);
+		case INSERT:
+			r = insert(
+				in0_path, in1_path, tmp2,
+				p0, p1
+			);
+			break;
+		case EXTRACT_H:
+		case EXTRACT_V:
+			r = extract(
+				in0_path, tmp1, tmp2,
+				size_defined,
+				p0, p1
+			);
+			break;
+		case DETECT:
+			r = detect(
+				in0_path, tmp2,
+				size_defined,
+				p0, p1
+			);
+			break;
 		}
+		if (r)
+			break;
+		
+		r1 = send_file(
+			(action == EXTRACT_H) ? tmp1 : tmp2,
+			"image/png",
+			0
+		);
+	} while (0);
+	if (r)
+	{
+		r1 = send_data(nclr, nclr_size, "image/png", 500);
 	}
-	waitpid(sub,&t,0);
-	if(t)mustard(t);
+	r2 = rm(tmp0);
+	r3 = rm(tmp1);
+	r4 = rm(tmp2);
+	if (r1)
+		return r1;
+	if (r2)
+		return r2;
+	if (r3)
+		return r3;
+	if (r4)
+		return r4;
+	return 0;
+}
+
+int insert(
+	char *inpix0, char *inpix1, char *outpix,
+	uint_fast8_t r0, uint_fast8_t r1
+)
+{
+	char s_r0[4];
+	char s_r1[4];
 	
-	pix=fopen((act==2?path1:path0),"rb");
-	if(pix==NULL)
-		mustard(123);
-	fstat(fileno(pix),&st);
-	p=st.st_size/1024;
-	q=st.st_size%1024;
+	pid_t sub;
+	int r;
 	
-	printf("Content-Length: %lu\n",(unsigned long)(st.st_size));
-	printf("Content-type: image/png\n\n");
-	for(i=0;i<p;++i)
-	{
-		fread(buf,1,1024,pix);
-		fwrite(buf,1,1024,stdout);
-	}
-	if(q!=0)
+	snprintf(s_r0, 4, "%"PRIuFAST8, r0);
+	snprintf(s_r1, 4, "%"PRIuFAST8, r1);
+	
+	sub = fork();
+	if (sub == 0)
 	{
-		fread(buf,1,q,pix);
-		fwrite(buf,1,q,stdout);
+		r = execl(
+			PAL_MIX_PATH, PAL_MIX_PATH,
+			inpix0, inpix1, outpix,
+			s_r0, s_r1,
+			(char *)0
+		);
+		exit(r);
 	}
-	fclose(pix);
-	fflush(stdout);
-	mustard(0);//no mustard
-	return(0);
+	waitpid(sub, &r, 0);
+	return r;
 }
 
-void mustard(int mustard)
+int extract(
+	char *inpix, char *outpix0, char *outpix1,
+	uint_fast8_t size_defined,
+	uint_fast8_t p0, uint_fast8_t p1
+)
 {
-	if(mustard)
+	char s_p0[4];
+	char s_p1[4];
+	
+	pid_t sub;
+	int r;
+	
+	if (size_defined)
 	{
-		cgiRedirect(MSTD_PATH);
+		snprintf(s_p0, 4, "%"PRIuFAST8, p0);
+		snprintf(s_p1, 4, "%"PRIuFAST8, p1);
 	}
-	sub=fork();
-	if(sub==0)
+	
+	sub = fork();
+	if (sub == 0)
 	{
-		t=execl(RM_PATH,RM_PATH,"-f",path0,(char *)0);
-		exit(t);
+		r = execl(
+			PAL_UNMIX_PATH, PAL_UNMIX_PATH,
+			inpix, outpix0, outpix1,
+			size_defined ? s_p0 : ((char *) 0),
+			size_defined ? s_p1 : ((char *) 0),
+			(char *) 0
+		);
+		exit(r);
 	}
-	waitpid(sub,&t,0);
+	waitpid(sub, &r, 0);
+	return r;
+}
+
+int detect(
+	char *inpix, char *outpix,
+	uint_fast8_t size_defined,
+	uint_fast8_t p0, uint_fast8_t p1
+)
+{
+	char s_p0[4];
+	char s_p1[4];
 	
-	sub=fork();
-	if(sub==0)
+	pid_t sub;
+	int r;
+	
+	if (size_defined)
 	{
-		t=execl(RM_PATH,RM_PATH,"-f",path1,(char *)0);
-		exit(t);
+		snprintf(s_p0, 4, "%"PRIuFAST8, p0);
+		snprintf(s_p1, 4, "%"PRIuFAST8, p1);
 	}
-	waitpid(sub,&t,0);
 	
-	pix=fopen(LOG_PATH,"at");
-	if(pix!=NULL)
+	sub = fork();
+	if (sub == 0)
 	{
-		fprintf(pix,"%x %x %s %s\n",mustard,act,url0,url1);
-		fclose(pix);
+		r = execl(
+			PAL_MIXDIFF_PATH, PAL_MIXDIFF_PATH,
+			inpix, outpix,
+			size_defined ? s_p0 : ((char *) 0),
+			size_defined ? s_p1 : ((char *) 0),
+			(char *) 0
+		);
+		exit(r);
 	}
-	exit(mustard);
+	waitpid(sub, &r, 0);
+	return r;
 }
-
-
diff --git a/pal.1.htm b/pal.1.htm
index ba5f9d4..e3a00f9 100644
--- a/pal.1.htm
+++ b/pal.1.htm
@@ -1,15 +1,5 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "">
-<html lang="pl">
-	<head>
-		<title>Hidden frames &bull; Bicycles on the Moon</title>
-		<meta http-equiv="Content-type" content="text/html; charset=iso-8859-2">
-		<link rel="stylesheet" href="/css/botm.css">
-		<link rel="icon" type="image/png" href="/img/favicon.png"/>
-	</head>
-	<body>
-		<a href="/"><img src="/img/botmlogo2.png" alt="1190.bicyclesonthemoon.info" border="0"></a>
-		<h1>Hidden frames</h1>
-		<form method="post" action="/cgi/insertframe/insertframe" enctype="multipart/form-data">
+		<h1>Hidden frames</h1>
+		<form method="post" action="/enhance/pal" enctype="multipart/form-data">
 			Upload frame(s):<br>
 			Frame 1: <input class="pt" type="file" name="inpixf0"><br>
 			Frame 2: <input class="pt" type="file" name="inpixf1"><br>
@@ -21,6 +11,9 @@
 			Visibility ratio:
 			<input class="pt" type="text" name="r0" value="1" size="1"> to <input class="pt" type="text" name="r1" value="0" size="1"><br>
 			<br>
+			Palette sizes:
+			1: <input class="pt" type="text" name="p0" size="2">, 2: <input class="pt" type="text" name="p1" size="2"><br>
+			<br>
 			Select action:<br>
 			<input type="radio" class="pt" name="a" value="0">Insert<br>
 			<input type="radio" class="pt" name="a" value="1">Extract horizontally<br>
@@ -29,14 +22,7 @@
 			<br>
 			<input class="pk" type="submit" value="Do it."><br>
 			<br>
-			When inserting you need two indexed images with the same size and the same number of colors.<br>
-			When enhancing you need one indexed image with a squarish palette.
-			
-			
+			When inserting you need two indexed images with the same size.<br>
+			When enhancing you need one indexed image, if palette sizes not specified then square root is used.
 		</form>
 		<br>
-		Source code available at <a href="http://1190.bicyclesonthemoon.info/pro/insertframe">http://1190.bicyclesonthemoon.info/pro/insertframe</a>.<br>
-		Livensed under <a href="/a/agpl.txt">AGPL 3</a>.
-		
-	</body>
-</html>
diff --git a/reveal-cgi.c b/reveal-cgi.c
index a03f077..43dfb0c 100644
--- a/reveal-cgi.c
+++ b/reveal-cgi.c
@@ -1,7 +1,7 @@
 /*
 reveal-cgi.c
 The online interface for the hidden detail revealer tool
-04.12.2022
+05.12.2022
 
 Copyright (C) 2022  Balthasar Szczepański
 
@@ -69,8 +69,6 @@ int main (int argc, char *argv[])
 	}
 	r2 = rm(in_tmp);
 	r3 = rm(out_tmp);
-	if (r)
-		return r;
 	if (r1)
 		return r1;
 	if (r2)
diff --git a/settings-release.txt b/settings-release.txt
index 08fa7da..2596c29 100644
--- a/settings-release.txt
+++ b/settings-release.txt
@@ -18,6 +18,7 @@ title_diff: See the difference!
 title_enhance: ENHANCE!
 title_nofading: No fading!
 title_npb: It's NewpixbOTTification time!
+title_pal: Hidden frames
 title_reveal: Reveal hidden detail!
 
 bin_path: /botm/bin/enhance
diff --git a/settings.txt b/settings.txt
index 8b0c9cd..e2668ba 100644
--- a/settings.txt
+++ b/settings.txt
@@ -27,6 +27,10 @@ _bin_nofading_path     = @_PATH($bin_path, nofading)
 _bin_nofading_cgi_path = @_PATH($bin_path, nofading-cgi)
 _bin_npb_path          = @_PATH($bin_path, npb)
 _bin_npb_cgi_path      = @_PATH($bin_path, npb-cgi)
+_bin_pal_mix_path      = @_PATH($bin_path, pal_mix)
+_bin_pal_mixdiff_path  = @_PATH($bin_path, pal_mixdiff)
+_bin_pal_unmix_path    = @_PATH($bin_path, pal_unmix)
+_bin_pal_cgi_path      = @_PATH($bin_path, pal-cgi)
 _bin_reveal_path       = @_PATH($bin_path, reveal)
 _bin_reveal_cgi_path   = @_PATH($bin_path, reveal-cgi)
 
@@ -40,6 +44,7 @@ CONF_bluenh   = $_bin_bluenh_cgi_path
 CONF_diff     = $_bin_diff_cgi_path
 CONF_nofading = $_bin_nofading_cgi_path
 CONF_npb      = $_bin_npb_cgi_path
+CONF_pal      = $_bin_pal_cgi_path
 CONF_reveal   = $_bin_reveal_cgi_path
 
 
@@ -73,8 +78,11 @@ C_RM_PATH   = @_C_DEFINE_STR(RM_PATH,   $rm)
 
 C_TEMP_PATH = @_C_DEFINE_STR(TEMP_PATH, $tmp_path)
 
-C_BLUENH_PATH   = @_C_DEFINE_STR(BLUENH_PATH,   $_bin_bluenh_path)
-C_DIFF_PATH     = @_C_DEFINE_STR(DIFF_PATH,     $_bin_diff_path)
-C_NOFADING_PATH = @_C_DEFINE_STR(NOFADING_PATH, $_bin_nofading_path)
-C_NPB_PATH      = @_C_DEFINE_STR(NPB_PATH,      $_bin_npb_path)
-C_REVEAL_PATH   = @_C_DEFINE_STR(REVEAL_PATH,   $_bin_reveal_path)
+C_BLUENH_PATH      = @_C_DEFINE_STR(BLUENH_PATH,      $_bin_bluenh_path)
+C_DIFF_PATH        = @_C_DEFINE_STR(DIFF_PATH,        $_bin_diff_path)
+C_NOFADING_PATH    = @_C_DEFINE_STR(NOFADING_PATH,    $_bin_nofading_path)
+C_NPB_PATH         = @_C_DEFINE_STR(NPB_PATH,         $_bin_npb_path)
+C_PAL_MIX_PATH     = @_C_DEFINE_STR(PAL_MIX_PATH,     $_bin_pal_mix_path)
+C_PAL_MIXDIFF_PATH = @_C_DEFINE_STR(PAL_MIXDIFF_PATH, $_bin_pal_mixdiff_path)
+C_PAL_UNMIX_PATH   = @_C_DEFINE_STR(PAL_UNMIX_PATH,   $_bin_pal_unmix_path)
+C_REVEAL_PATH      = @_C_DEFINE_STR(REVEAL_PATH,      $_bin_reveal_path)
-- 
2.30.2