Added a camera lib project built with OpenCV

camera_lib/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+project(camera_lib)
+# find_package(OpenCV REQUIRED)
+# set(OpenCV_DIR "c:/opencv/sources") # Update this path to the location of your OpenCV source code
+
+# set(OpenCV_MODULES_CORE ON)
+# set(OpenCV_MODULES_IMGPROC ON)
+# set(OpenCV_MODULES_HIGHGUI ON)
+# set(OpenCV_MODULES_VIDEOIO ON)
+
+add_subdirectory(src)
+add_subdirectory(example)

camera_lib/README.md

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+# Slimmed Down OpenCV for Camera Applications
+1. Download the OpenCV source code from the [OpenCV GitHub repository](https://github.com/opencv/opencv).
+2. Open a terminal or command prompt, create a build directory, and navigate into it:
+
+    ```bash
+    mkdir build
+    cd build
+    ```
+3. Run the following CMake command to configure the build, disabling unnecessary components:
+
+    ```bash
+    cmake -DBUILD_SHARED_LIBS=ON -DBUILD_opencv_world=OFF -DBUILD_opencv_apps=OFF -DBUILD_opencv_calib3d=OFF -DBUILD_opencv_dnn=OFF -DBUILD_opencv_features2d=OFF -DBUILD_opencv_flann=OFF -DBUILD_opencv_gapi=OFF -DBUILD_opencv_ml=OFF -DBUILD_opencv_objdetect=OFF -DBUILD_opencv_photo=OFF -DBUILD_opencv_stitching=OFF -DBUILD_opencv_video=OFF -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_EXAMPLES=OFF -DBUILD_DOCS=OFF ..
+    ```
+
+4. Build the OpenCV library:
+
+    ```bash
+    cmake --build . --config Release
+    ```
+
+5. Copy the library files `opencv_imgproc`, `opencv_core`, `opencv_imgcodecs`, `opencv_videoio`, and `opencv_highgui` to the `lib` directory.
+6. Configure `src/CMakeLists.txt` to link against the OpenCV library.
+
+    ```cmake
+    target_link_libraries(camera_lib opencv_core480 opencv_highgui480 opencv_videoio480 opencv_imgproc480)
+    ```
+7. Build the camera application:
+
+    ```bash
+    mkdir build
+    cd build
+    cmake ..
+    cmake --build . --config Release
+    ```

camera_lib/example/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+project(camera_example)
+
+link_directories(${CMAKE_CURRENT_SOURCE_DIR}/../lib)
+# Create the executable
+add_executable(camera_example main.cpp)
+target_include_directories(camera_example PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../include)
+target_link_libraries(camera_example camera_lib)
+
+add_custom_command(TARGET camera_example POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy $<TARGET_FILE:camera_lib> $<TARGET_FILE_DIR:camera_example>)
+
+# Find all DLL files in the specified directory
+file(GLOB DLL_FILES "${CMAKE_CURRENT_SOURCE_DIR}/../lib/*.dll")
+
+# Copy the DLL files to the executable directory
+foreach(DLL_FILE ${DLL_FILES})
+    add_custom_command(TARGET camera_example POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        ${DLL_FILE}
+        $<TARGET_FILE_DIR:camera_example>)
+endforeach()

camera_lib/example/main.cpp

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+#include <iostream>
+#include "camera_lib.h"
+
+int main()
+{
+    if (open_camera(0) == 0)
+    {
+        std::cout << "Camera opened successfully." << std::endl;
+        while (true)
+        {
+            ImageData frame = get_frame();
+            if (frame.data)
+            {
+                draw_line(&frame, 50, 50, 200, 200, 2, 255, 0, 0);
+                draw_line(&frame, 50, 200, 200, 50, 2, 0, 255, 0);
+                draw_text(&frame, "Hello, OpenCV!", 50, 50, 1, 2, 0, 255, 0);
+
+                display_image(&frame);
+                if (wait_key(30) >= 0)
+                { // Add a delay and check for key press
+                    release_image(&frame);
+                    break; // Exit the loop if any key is pressed
+                }
+                release_image(&frame);
+            }
+        }
+        close_camera();
+    }
+    else
+    {
+        std::cerr << "Failed to open camera." << std::endl;
+    }
+    return 0;
+}

camera_lib/include/camera_lib.h

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+#ifndef CAMERA_LIB_H
+#define CAMERA_LIB_H
+
+#ifdef _WIN32
+#ifdef CAMERA_LIB_EXPORTS
+#define CAMERA_LIB_API __declspec(dllexport)
+#else
+#define CAMERA_LIB_API __declspec(dllimport)
+#endif
+#else
+#define CAMERA_LIB_API
+#endif
+
+#include <cstdint>
+
+enum PixelFormat
+{
+    PIXEL_FORMAT_BGR,
+    PIXEL_FORMAT_GRAY
+};
+
+extern "C"
+{
+    typedef struct
+    {
+        int width;
+        int height;
+        int stride;
+        PixelFormat pixel_format;
+        uint8_t *data;
+    } ImageData;
+
+    CAMERA_LIB_API int open_camera(int camera_index);
+    CAMERA_LIB_API void close_camera();
+    CAMERA_LIB_API ImageData get_frame();
+    CAMERA_LIB_API void release_image(ImageData *image);
+    CAMERA_LIB_API void display_image(const ImageData *image);
+    CAMERA_LIB_API void draw_line(ImageData *image, int x1, int y1, int x2, int y2, int thickness, int r, int g, int b);
+    CAMERA_LIB_API void draw_text(ImageData *image, const char *text, int x, int y, int font_scale, int thickness, int r, int g, int b);
+    CAMERA_LIB_API int wait_key(int delay);
+}
+
+#endif // CAMERA_LIB_H