Misc (#19)

* get image returns optional<Mat> instead of unique_ptr<Mat>

* introduce complexity

* rename image load function

* add example for a basic reader for binary image files

* fix windows build?

* add a status bar underneath the menu bar

* use status bar in custom_0 example app

* clang formats

* packing w/ pragma push

* add "Save As" functions to image views

* resize over reserve

* rm local override uri

* add simple thread pool

* rename to simple_thread_pool

* get rid of useless renderlib

* document version inc

* extract hardcoded values to in-header

* clang format patch

* clone registered image in custom_0

* document binary-file header

* minor fixes

* clang format

* rm unused render cmake

tests/lib/resources/test_resource.cpp

@@ -2,20 +2,21 @@
 
 #include <algorithm>
 
+#include "imaging/IPixelariumImage.hpp"
 #include "resources/resource.hpp"
 
 namespace
 {
 
 // A Mock implementation for tests requiring _any_ instance of a IPixelariumImage
-class DummyImage : public pixelarium::imaging::IPixelariumImage
+class DummyImage : public pixelarium::imaging::IPixelariumImageCvMat
 {
    public:
-    std::unique_ptr<cv::Mat> TryGetImage() override { return {}; }
+    std::optional<cv::Mat> TryGetImage() override { return {}; }
 
-    std::unique_ptr<cv::Mat> TryGetImage(const pixelarium::imaging::IImageQuery&) override { return {}; }
+    std::optional<cv::Mat> TryGetImage(const pixelarium::imaging::IImageQuery&) override { return {}; }
 
-    std::vector<std::unique_ptr<cv::Mat>> TryGetImages(const pixelarium::imaging::IImageQuery&) override { return {}; }
+    std::vector<std::optional<cv::Mat>> TryGetImages(const pixelarium::imaging::IImageQuery&) override { return {}; }
 
     std::string Name() const noexcept override { return {}; }
 
@@ -43,7 +44,7 @@ TEST(ImageResourcePoolTest, SetWrappedRawPointerGet)
 {
     ImageResourcePool pool;
     auto img = new DummyImage();
-    auto id = pool.SetResource(std::unique_ptr<pixelarium::imaging::IPixelariumImage>(img));
+    auto id = pool.SetResource(std::unique_ptr<pixelarium::imaging::IPixelariumImageCvMat>(img));
     auto res = pool.GetResource(id);
     auto res_img = res.lock();
     EXPECT_NE(res_img, nullptr);
@@ -95,7 +96,7 @@ TEST(ImageResourcePoolTest, EnumerateResources)
     auto id2 = pool.SetResource(std::make_unique<DummyImage>());
     std::vector<size_t> found_ids{};
 
-    pool.EnumerateResources([&found_ids](size_t id, size_t, const pixelarium::imaging::IPixelariumImage&)
+    pool.EnumerateResources([&found_ids](size_t id, size_t, const pixelarium::imaging::IPixelariumImage<cv::Mat>&)
                             { found_ids.push_back(id); });
 
     EXPECT_EQ(found_ids.size(), 2);
@@ -110,7 +111,7 @@ TEST(ImageResourcePoolTest, TemplatedEnumerate)
     auto id2 = pool.SetResource(std::make_unique<DummyImage>());
     std::vector<size_t> found_ids{};
 
-    pool.Enumerate([&found_ids](size_t id, size_t, const pixelarium::imaging::IPixelariumImage&)
+    pool.Enumerate([&found_ids](size_t id, size_t, const pixelarium::imaging::IPixelariumImage<cv::Mat>&)
                    { found_ids.push_back(id); });
 
     EXPECT_EQ(found_ids.size(), 2);