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

examples/custom_1/CMakeLists.txt

@@ -7,7 +7,6 @@ add_executable(${CUSTOM_1_NAME} ${SRC})
 
 target_link_libraries(${CUSTOM_1_NAME}
   PRIVATE pixelariumimagelib
-  PRIVATE pixelariumrenderlib
   PRIVATE pixelariumutilslib
   PRIVATE pixelariumresourcelib
   PRIVATE pixelariumapplicationlib)

examples/custom_1/custom_1.cpp

@@ -52,7 +52,7 @@ class Selector
         if (ImGui::BeginCombo("Select first image", preview_0_.c_str()))
         {
             pool_.Enumerate(
-                [&](resources::ResourceKey key, size_t idx, const imaging::IPixelariumImage& img) -> void
+                [&](resources::ResourceKey key, size_t idx, const imaging::IPixelariumImage<cv::Mat>& img) -> void
                 {
                     const bool is_selected = static_cast<int>(idx) == selected_idx_0;
                     if (ImGui::Selectable(img.Name().c_str(), is_selected))
@@ -74,7 +74,7 @@ class Selector
         if (ImGui::BeginCombo("Select second image", preview_1_.c_str()))
         {
             pool_.Enumerate(
-                [&](resources::ResourceKey key, size_t idx, const imaging::IPixelariumImage& img) -> void
+                [&](resources::ResourceKey key, size_t idx, const imaging::IPixelariumImage<cv::Mat>& img) -> void
                 {
                     const bool is_selected = static_cast<int>(idx) == selected_idx_1;
                     if (ImGui::Selectable(img.Name().c_str(), is_selected))
@@ -100,11 +100,12 @@ class Selector
             auto img1 = pool_.GetResource(selected_key_1);
             auto img_mat1 = img1.lock()->TryGetImage();
 
-            if (img_mat0 == nullptr || img_mat1 == nullptr || img_mat0->empty() || img_mat1->empty()) return;
+            if (!img_mat0.has_value() || !img_mat1.has_value() || img_mat0.value().empty() || img_mat1.value().empty())
+                return;
 
             if (img_mat0->size != img_mat1->size) return;
 
-            cv::multiply(*img_mat0, *img_mat1, *img_mat0);
+            cv::multiply(img_mat0.value(), img_mat1.value(), img_mat0.value());
 
             std::string name{std::format("Multiply_{}", idx_)};
             pool_.SetResource(std::make_unique<imaging::PixelariumMem>(*img_mat0, name, *logger));