can render 2 cv::mats

lib/CMakeLists.txt

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+add_subdirectory(imaging)
+add_subdirectory(rendering)

lib/imaging/CMakeLists.txt

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+include(${CMAKE_SOURCE_DIR}/cmake/libCZI.cmake)
+
+find_package(OpenCV REQUIRED)
+
+message(STATUS "Found opencv: " ${OpenCV_INCLUDE_DIRS})
+message(STATUS "OpenCV_LIBs from: " ${OpenCV_LIBS})
+
+set(IMAGELIBSRC
+  Image.cpp)
+
+set(IMAGELIBLIBNAME pixelariumimagelib)
+
+add_library(${IMAGELIBLIBNAME}
+  STATIC ${IMAGELIBSRC})
+
+target_link_libraries(${IMAGELIBLIBNAME}
+  PUBLIC ${OpenCV_LIBS}
+  PRIVATE libCZIStatic)
+
+
+target_include_directories(${IMAGELIBLIBNAME}
+  PUBLIC ${OpenCV_INCLUDE_DIRS}
+  PRIVATE ${LIBCZI_INCLUDE_DIR})

lib/imaging/Image.cpp

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+#include "Image.hpp"
+
+#include <filesystem>
+#include <opencv2/imgcodecs.hpp>
+#include <stdexcept>
+
+pixelarium::imaging::Image::Image(const std::string& uri)
+{
+    if (!std::filesystem::exists(uri))
+    {
+        throw std::runtime_error("File not found");
+    }
+
+    this->_img = cv::imread(uri);
+}

lib/imaging/Image.hpp

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+#pragma once
+
+#include <filesystem>
+#include <memory>
+#include <opencv2/core/mat.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/opencv.hpp>
+#include <string>
+
+namespace pixelarium::imaging
+{
+class Image
+{
+   public:
+
+    explicit Image(const std::string& uri);
+
+    // get back the defaults
+    Image() = default;
+    Image(const Image& other) = default;
+    Image(Image&& other) noexcept = default;
+    Image& operator=(const Image& other) = default;
+    Image& operator=(Image&& other) noexcept = default;
+    ~Image() = default;
+
+    const cv::Mat& GetImage() const { return this->_img; }
+
+   private:
+    cv::Mat _img;
+};
+
+}  // namespace pixelarium::imaging

lib/rendering/CMakeLists.txt

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+set(RENDERSRC)
+
+set(RENDERLIBNAME pixelariumrenderlib)
+
+set(RENDERLIBSRC
+  CvMatRender.cpp)
+
+add_library(${RENDERLIBNAME} STATIC
+  ${RENDERLIBSRC})
+
+target_link_libraries(${RENDERLIBNAME}
+  PRIVATE pixelariumimagelib)
+
+target_include_directories(${RENDERLIBNAME}
+  PRIVATE ${CMAKE_SOURCE_DIR}/lib)

lib/rendering/CvMatRender.cpp

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+#include "CvMatRender.hpp"
+#include <cstdint>
+
+using namespace pixelarium::imaging;
+
+pixelarium::render::CvMatRender::CvMatRender(const Image& img)
+{
+    this->_img = img.GetImage();
+    this->_texture = 0;
+
+    cv::cvtColor(this->_img, this->_img, cv::COLOR_BGR2RGBA);
+}
+
+/*static*/ void pixelarium::render::matToTexture(const cv::Mat& image, GLuint* texture)
+{
+    glGenTextures(1, texture);
+    glBindTexture(GL_TEXTURE_2D, *texture);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    // auto image = img.GetImage();
+    switch (image.type())
+    {
+        case CV_16U:
+        case CV_16UC3:
+        case 26:
+            glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.cols, image.rows, 0,
+                         GL_RGBA, GL_UNSIGNED_SHORT, image.data);
+            break;
+        case 5:
+        case 29:
+            glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.cols, image.rows, 0,
+                         GL_RGBA, GL_FLOAT, image.data);
+            break;
+        default:
+            glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.cols, image.rows, 0,
+                         GL_RGBA, GL_UNSIGNED_BYTE, image.data);
+            break;
+    }
+}
+
+GLuint pixelarium::render::CvMatRender::Render()
+{
+    matToTexture(this->_img, &this->_texture);
+    return this->_texture;
+}

lib/rendering/CvMatRender.hpp

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+#pragma once
+#ifdef _WIN32
+#include <windows.h>
+#include <GL/GL.h>
+#else
+#define GL_SILENCE_DEPRECATION
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+#include <GLES2/gl2.h>
+#endif
+#include <GLFW/glfw3.h>  // Will drag system OpenGL headers
+#endif
+#include "imaging/Image.hpp"
+
+namespace pixelarium::render
+{
+    static void matToTexture(const cv::Mat& image,
+                         GLuint* texture);
+class CvMatRender
+{
+   public:
+    explicit CvMatRender(const pixelarium::imaging::Image& img);
+    // void* Render();
+    GLuint Render();
+
+   private:
+    cv::Mat _img;
+    GLuint _texture;
+};
+
+}  // namespace pixelarium::render

lib/utilities/ILog.hpp

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+#pragma once
+#include <string>
+
+namespace pixelarium::utils::log
+{
+class ILog
+{
+   public:
+    virtual void Info(const std::string& msg,
+                      const std::string& source = "") = 0;
+    virtual void Debug(const std::string& msg,
+                       const std::string& source = "") = 0;
+    virtual void Warn(const std::string& msg,
+                      const std::string& source = "") = 0;
+    virtual void Error(const std::string& msg,
+                       const std::string& source = "") = 0;
+
+    virtual ~ILog() {}
+};
+
+}  // namespace pixelarium::utils

lib/utilities/SpdLogger.hpp

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+#pragma once
+#include "ILog.hpp"
+namespace pixelarium::utils::log
+{
+class SpdLogger : public ILog
+{
+   public:
+    SpdLogger(const std::string& file_sink);
+
+    void Info(const std::string& msg,
+              const std::string& source = "") override;
+    void Debug(const std::string& msg,
+               const std::string& source = "") override;
+    void Warn(const std::string& msg,
+              const std::string& source = "") override;
+    void Error(const std::string& msg,
+                       const std::string& source = "") override;
+};
+}  // namespace pixelarium::utils::log