1 files changed, 57 insertions, 0 deletions
diff --git a/convert.c b/convert.c
new file mode 100644
index 0000000..333d79d
--- /dev/null
+++ b/convert.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <string.h>
+
+#define MAGICKCORE_QUANTUM_DEPTH 8
+#define MAGICKCORE_HDRI_ENABLE 0
+#include <MagickCore/MagickCore.h>
+
+int convert(const char *in, const char *out, int width, int height)
+{
+	if (!IsMagickCoreInstantiated()) {
+		MagickCoreGenesis(NULL, MagickFalse);
+	}
+
+	printf("converting image %s\n", in);
+
+	ExceptionInfo *exception = AcquireExceptionInfo();
+
+	printf("reading original image\n");
+	ImageInfo *info = CloneImageInfo((ImageInfo*)NULL);
+	if (info == NULL) {
+		printf("couldn't create new ImageInfo\n");
+		return 1;
+	}
+	strcpy(info->filename, in);
+	Image *original = ReadImage(info, exception);
+	if (original == NULL) {
+		printf("couldn't read original\n");
+		return 0;
+	}
+
+	printf("resizing\n");
+	Image *resized = ResizeImage(original, width, height, LanczosFilter, exception);
+	DestroyImage(original);
+	if (resized == NULL) {
+		printf("couldn't resize\n");
+		return 0;
+	}
+
+	printf("rotating\n");
+	Image *rotated = IntegralRotateImage(resized, 3, exception);
+	DestroyImage(resized);
+	if (rotated == NULL) {
+		printf("couldn't rotate\n");
+		return 0;
+	}
+
+	printf("writing grayscale\n");
+	strcpy(info->filename, out);
+	WriteImage(info, rotated, exception);
+
+	printf("cleaning up\n");
+	DestroyImage(rotated);
+	DestroyImageInfo(info);
+	DestroyExceptionInfo(exception);
+
+	return 1;
+}