add mini cvsteer package

A concise implementation of separable steerable filters via Freeman and Adelson, including second derivative of Gaussian and its Hilbert transform, implemented with the OpenCV C++ API

cmake/configs/default.cmake

@@ -170,6 +170,7 @@ hunter_config(crashup VERSION 0.0.2)
 hunter_config(cryptopp VERSION 5.6.5-p0)
 hunter_config(cub VERSION 1.7.4-p0)
 hunter_config(cvmatio VERSION 1.0.28)
+hunter_config(cvsteer VERSION 0.1.1)
 hunter_config(cxxopts VERSION 1.0.0-p0)
 hunter_config(czmq VERSION 4.0.2-p1)
 hunter_config(damageproto VERSION 1.2.1)

cmake/projects/cvsteer/hunter.cmake

@@ -0,0 +1,26 @@
+# Copyright (c) 2016-2018, Ruslan Baratov
+# Copyright (c) 2018, David Hirvonen
+# All rights reserved.
+
+# !!! DO NOT PLACE HEADER GUARDS HERE !!!
+
+include(hunter_add_version)
+include(hunter_cacheable)
+include(hunter_cmake_args)
+include(hunter_download)
+include(hunter_pick_scheme)
+
+hunter_add_version(
+    PACKAGE_NAME
+    cvsteer
+    VERSION
+    0.1.1
+    URL
+    "https://github.com/headupinclouds/cvsteer/archive/v0.1.1.tar.gz"
+    SHA1
+    b54b096910c0947e1af125e134b2511b25dc847d
+    )
+
+hunter_pick_scheme(DEFAULT url_sha1_cmake)
+hunter_cacheable(cvsteer)
+hunter_download(PACKAGE_NAME cvsteer)

docs/packages/pkg/cvsteer.rst

@@ -0,0 +1,18 @@
+.. spelling::
+
+    cvsteer
+
+.. index:: computer-vision ; cvsteer
+
+.. _pkg.cvsteer:
+
+cvsteer
+=======
+
+-  `Official <http://github.com/headupinclouds/cvsteer>`__
+-  `Example <https://github.com/ruslo/hunter/blob/master/examples/cvsteer/CMakeLists.txt>`__
+
+.. literalinclude:: /../examples/cvsteer/CMakeLists.txt
+  :language: cmake
+  :start-after: # DOCUMENTATION_START {
+  :end-before: # DOCUMENTATION_END }

examples/cvsteer/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Copyright (c) 2016-2018, Ruslan Baratov
+# Copyright (c) 2018, David Hirvonen
+# All rights reserved.
+
+cmake_minimum_required(VERSION 3.0)
+
+# Emulate HunterGate:
+# * https://github.com/hunter-packages/gate
+include("../common.cmake")
+
+project(download-cvsteer)
+
+hunter_add_package(cvsteer)
+find_package(cvsteer CONFIG REQUIRED)
+
+add_executable(foo foo.cpp)
+target_link_libraries(foo cvsteer::cvsteer)

examples/cvsteer/foo.cpp

@@ -0,0 +1,6 @@
+#include <cvsteer/SteerableFiltersG2.h>
+
+int main() {
+    cv::Mat1f image = cv::Mat1f::zeros(128, 128);
+    fa::SteerableFiltersG2 filters(image, 4, 0.67f);
+}