libwinpr-utils: add simple image loading/writing test

winpr/libwinpr/utils/test/TestImage.c

@@ -1,9 +1,48 @@
 
 #include <winpr/crt.h>
+#include <winpr/path.h>
+#include <winpr/print.h>
 #include <winpr/image.h>
 
+int test_image_png_to_bmp()
+{
+	int status;
+	wImage* image;
+
+	if (!PathFileExistsA("/tmp/test.png"))
+		return 1; /* skip */
+
+	image = winpr_image_new();
+
+	if (!image)
+		return -1;
+
+	status = winpr_image_read(image, "/tmp/test.png");
+
+	if (status < 0)
+		return -1;
+
+	image->type = WINPR_IMAGE_BITMAP;
+	status = winpr_image_write(image, "/tmp/test_out.bmp");
+
+	if (status < 0)
+		return -1;
+
+	image->type = WINPR_IMAGE_PNG;
+	status = winpr_image_write(image, "/tmp/test_out.png");
+
+	if (status < 0)
+		return -1;
+
+	winpr_image_free(image, TRUE);
+
+	return 1;
+}
+
 int TestImage(int argc, char* argv[])
 {
+	test_image_png_to_bmp();
+
 	return 0;
 }