[Hugin-cvs] SF.net SVN: hugin: [2246] libpanorama/trunk/src/vips

[<sha...@us...>]

Revision: 2246
          http://hugin.svn.sourceforge.net/hugin/?rev=2246&view=rev
Author:   shahid_du
Date:     2007-07-08 11:03:45 -0700 (Sun, 08 Jul 2007)

Log Message:
-----------
Added missing files maskgen.c and maskgen.h.

Added Paths:
-----------
    libpanorama/trunk/src/vips/maskgen.c
    libpanorama/trunk/src/vips/maskgen.h

Added: libpanorama/trunk/src/vips/maskgen.c
===================================================================
--- libpanorama/trunk/src/vips/maskgen.c	                        (rev 0)
+++ libpanorama/trunk/src/vips/maskgen.c	2007-07-08 18:03:45 UTC (rev 2246)
@@ -0,0 +1,67 @@
+#include "stdio.h"
+#include "stdlib.h"
+#include <string.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <assert.h>
+
+#include "maskgen.h"
+
+
+int isFormat(IMAGE *out, const char *fileName, const char *format)
+{
+	/*printf("starting format chk with filename = %s, format = %s\n", fileName, format);*/
+	char *ext, *substr;
+	int i;
+
+	if(!(ext = IM_ARRAY(out, 10, char))) {
+		printf("memeroy allocation error\n");
+		return -1;
+	}
+	substr = IM_ARRAY(out, 10, char);
+
+	substr = strrchr(fileName, '.');
+	for(i = 0; i < strlen(substr)-1; i++) {
+		ext[i] = tolower(substr[i+1]);
+	}
+
+	ext[i] = '\0';
+
+	/*printf("in isFormat: format = %s, ext = %s\n", format, ext);*/
+	i = strcmp(format, ext);
+
+	return i;
+}
+
+
+int circle (IMAGE * out, int w, int h, double x, double y, double r)
+{
+	IMAGE *t[8];
+
+  	if (im_open_local_array (out, t, 8, "circle", "p") ||
+      /* Get x/y into t[1] and t[2]
+       */
+      	im_make_xy (t[0], w, h) ||
+      	im_extract_band (t[0], t[1], 0) || im_extract_band (t[0], t[2], 1) ||
+      /* Shift origin
+       */
+      	im_lintra (1.0, t[1], -x, t[3]) || im_lintra (1.0, t[2], -y, t[4]) ||
+      /* Square.
+       */
+      	im_multiply (t[3], t[3], t[5]) || im_multiply (t[4], t[4], t[6]) ||
+      /* Add and threshold.
+       */
+      	im_add (t[5], t[6], t[7]) || im_lessconst (t[7], out, r * r))    
+		return (-1);
+
+  	return (0);
+}
+
+
+int makeCircularMask(IMAGE *out, int width, int height, double cx, double cy, double radius)
+{
+	if(circle(out, width, height, cx, cy, radius))	
+		return -1;
+
+	return 0;
+}

Added: libpanorama/trunk/src/vips/maskgen.h
===================================================================
--- libpanorama/trunk/src/vips/maskgen.h	                        (rev 0)
+++ libpanorama/trunk/src/vips/maskgen.h	2007-07-08 18:03:45 UTC (rev 2246)
@@ -0,0 +1,27 @@
+#ifndef __MASKGEN_H__
+#define __MASKGEN_H__
+
+#include <vips/vips.h>
+
+/*
+Input mask checking procedure:
+1. detect whether input image is tif or png (In this case they already
+possess a mask.)
+2. if condition 1 is true then extract band no. 4 (let the staring
+band is numbered as 1) as initial input image mask.
+3. if condition 1 is false then create a white image as initial mask
+(by using im_black and im_invert).
+4. Logically And the initial mask obtained either from step 2 or 3
+with the mask obtained from the panotools script - more specifically a
+mask is available if circular crop is mentioned, i.e. if
+pt_transform->crop_circular = 1, then extract crop parameters from
+crop_circular_cx, crop_circular_cy, crop_circular_radius and create
+the circle mask with these parameters using manual circle operation.
+5. Pass the combined  input mask to resample operation.
+6. Check the mask along with input image boundary check during resampling.
+*/
+
+int isFormat(IMAGE *out, const char *fileName, const char *format);
+int makeCircularMask(IMAGE *out, int widht, int height, double cx, double cy, double radius);
+
+#endif


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