From 21fb53743a586f474176ffcc01046a5c292ac719 Mon Sep 17 00:00:00 2001
From: Symisc Systems <chm@symisc.net>
Date: Tue, 5 Jun 2018 04:13:04 +0200
Subject: [PATCH] Extract a region (crop) from a given image

---
 samples/crop_image.c | 57 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 samples/crop_image.c

diff --git a/samples/crop_image.c b/samples/crop_image.c
new file mode 100644
index 0000000..a601781
--- /dev/null
+++ b/samples/crop_image.c
@@ -0,0 +1,57 @@
+/*
+ * Programming introduction with the SOD Embedded Image Processing API.
+ * Copyright (C) PixLab | Symisc Systems, https://sod.pixlab.io
+ */
+/*
+* Compile this file together with the SOD embedded source code to generate
+* the executable. For example:
+*
+*  gcc sod.c crop_image.c -lm -Ofast -march=native -Wall -std=c99 -o sod_img_proc
+*  
+* Under Microsoft Visual Studio (>= 2015), just drop `sod.c` and its accompanying
+* header files on your source tree and you're done. If you have any trouble
+* integrating SOD in your project, please submit a support request at:
+* https://sod.pixlab.io/support.html
+*/
+/*
+* This simple program is a quick introduction on how to embed and start
+* experimenting with SOD without having to do a lot of tedious
+* reading and configuration.
+*
+* Make sure you have the latest release of SOD from:
+*  https://pixlab.io/downloads
+* The SOD Embedded C/C++ documentation is available at:
+*  https://sod.pixlab.io/api.html
+*/
+#include <stdio.h>
+#include "sod.h"
+/*
+* Extract a region (crop) from a given image.
+*/
+int main(int argc, char *argv[])
+{
+	/* Input image (pass a path or use the test image shipped with the samples ZIP archive) */
+	const char *zInput = argc > 1 ? argv[1] : "./flower.jpg";
+	/* Processed output image path */
+	const char *zOut = argc > 2 ? argv[2] : "./out_crop.png";
+	/* Load the input image in full color */
+	sod_img imgIn = sod_img_load_from_file(zInput, SOD_IMG_COLOR /* full color channels */);
+	if (imgIn.data == 0) {
+		/* Invalid path, unsupported format, memory failure, etc. */
+		puts("Cannot load input image..exiting");
+		return 0;
+	}
+	/* Crop offset: Target region coordinates, height & width  */
+	int x = imgIn.w / 2;
+	int y = imgIn.h / 2;
+	int width = 128;
+	int height = 128;
+	/* Crop */
+	sod_img crop = sod_crop_image(imgIn, x, y, width, height);
+	/* Save the cropped region to the specified path */
+	sod_img_save_as_png(crop, zOut);
+	/* Cleanup */
+	sod_free_image(imgIn);
+	sod_free_image(crop);
+	return 0;
+}
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