From c5a8ccd7cf841ae491e905b709cb702f3c86bedf Mon Sep 17 00:00:00 2001
From: giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>
Date: Sun, 25 Jan 2009 19:13:21 +0000
Subject: Move stuff into new editor/specialty/ directory

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@831 9d0c8265-081b-0410-96cb-a4ca84ce46f8
---
 editor/specialty/pamdeinterlace.c | 132 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 editor/specialty/pamdeinterlace.c

(limited to 'editor/specialty/pamdeinterlace.c')

diff --git a/editor/specialty/pamdeinterlace.c b/editor/specialty/pamdeinterlace.c
new file mode 100644
index 00000000..9ed1d8eb
--- /dev/null
+++ b/editor/specialty/pamdeinterlace.c
@@ -0,0 +1,132 @@
+/******************************************************************************
+                             pamdeinterlace
+*******************************************************************************
+  De-interlace an image, i.e. select every 2nd row.
+   
+  By Bryan Henderson, San Jose, CA 2001.11.11.
+
+  Contributed to the public domain.
+******************************************************************************/
+
+#include "pam.h"
+#include "shhopt.h"
+#include "mallocvar.h"
+
+enum evenodd {EVEN, ODD};
+
+struct cmdlineInfo {
+    /* All the information the user supplied in the command line,
+       in a form easy for the program to use.
+    */
+    const char *inputFilespec;  /* Filespecs of input files */
+    enum evenodd rowsToTake;
+};
+
+
+static void
+parseCommandLine(int argc, char ** argv,
+                 struct cmdlineInfo *cmdlineP) {
+/*----------------------------------------------------------------------------
+   Note that the file spec array we return is stored in the storage that
+   was passed to us as the argv array.
+-----------------------------------------------------------------------------*/
+    optStruct3 opt;  /* set by OPTENT3 */
+    optEntry *option_def;
+    unsigned int option_def_index;
+
+    unsigned int takeeven, takeodd;
+
+    MALLOCARRAY_NOFAIL(option_def, 100);
+
+    option_def_index = 0;   /* incremented by OPTENT3 */
+    OPTENT3(0,   "takeeven", OPT_FLAG, NULL, &takeeven, 0);
+    OPTENT3(0,   "takeodd",  OPT_FLAG, NULL, &takeodd,  0);
+
+    opt.opt_table = option_def;
+    opt.short_allowed = FALSE;  /* We have no short (old-fashioned) options */
+    opt.allowNegNum = FALSE;  /* We have no parms that are negative numbers */
+
+    optParseOptions3(&argc, argv, opt, sizeof(opt), 0);
+        /* Uses and sets argc, argv, and some of *cmdlineP and others. */
+
+    if (takeeven && takeodd)
+        pm_error("You cannot specify both -takeeven and -takeodd options.");
+
+    if (takeodd)
+        cmdlineP->rowsToTake = ODD;
+    else
+        cmdlineP->rowsToTake = EVEN;
+
+    if (argc-1 < 1)
+        cmdlineP->inputFilespec = "-";
+    else if (argc-1 == 1)
+        cmdlineP->inputFilespec = argv[1];
+    else
+        pm_error("You specified too many arguments (%d).  The only "
+                 "argument is the optional input file specification.",
+                 argc-1);
+}
+
+
+
+
+
+int
+main(int argc, char *argv[]) {
+
+    FILE * ifP;
+    tuple * tuplerow;   /* Row from input image */
+    unsigned int row;
+    struct cmdlineInfo cmdline;
+    struct pam inpam;  
+    struct pam outpam;
+
+    pnm_init( &argc, argv );
+
+    parseCommandLine(argc, argv, &cmdline);
+
+    ifP = pm_openr(cmdline.inputFilespec);
+    
+    pnm_readpaminit(ifP, &inpam, PAM_STRUCT_SIZE(tuple_type));
+
+    tuplerow = pnm_allocpamrow(&inpam);
+
+    outpam = inpam;    /* Initial value -- most fields should be same */
+    outpam.file = stdout;
+    if (inpam.height % 2 == 0)
+        outpam.height = inpam.height / 2;
+    else {
+        if (cmdline.rowsToTake == ODD)
+            outpam.height = inpam.height / 2;
+        else
+            outpam.height = inpam.height / 2 + 1;
+    }
+
+    pnm_writepaminit(&outpam);
+
+    {
+        unsigned int modulusToTake;
+            /* The row number mod 2 of the rows that are supposed to go into
+               the output.
+            */
+
+        switch (cmdline.rowsToTake) {
+        case EVEN: modulusToTake = 0; break;
+        case ODD:  modulusToTake = 1; break;
+        default: pm_error("INTERNAL ERROR: invalid rowsToTake");
+        }
+
+        /* Read input and write out rows extracted from it */
+        for (row = 0; row < inpam.height; row++) {
+            pnm_readpamrow(&inpam, tuplerow);
+            if (row % 2 == modulusToTake)
+                pnm_writepamrow(&outpam, tuplerow);
+        }
+    }
+    pnm_freepamrow(tuplerow);
+    pm_close(inpam.file);
+    pm_close(outpam.file);
+    
+    return 0;
+}
+
-- 
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