client egl context and viewport in kotlin UI

src/main/cpp/mosis-test.cpp

@@ -1,11 +1,61 @@
 #include <jni.h>
 #include <android/binder_ibinder_jni.h>
 #include <aidl/com/omixlab/mosis/IMosisService.h>
+#include <android/native_window_jni.h>
 #include "logger.h"
+#include "egl_context.h"
+#include <glad/gles2.h>
+#include <memory>
+#include <thread>
 
 using namespace aidl::com::omixlab::mosis;
 
+class Renderer
+{
+    std::unique_ptr<egl::Context> m_egl_context;
+    std::thread m_render_loop;
+    bool m_active = false;
+    void render_loop(ANativeWindow* window)
+    {
+        m_egl_context = std::make_unique<egl::Context>();
+        if (m_egl_context->create(window))
+        {
+            m_active = true;
+            while (m_active)
+            {
+                render_frame();
+            }
+        }
+        else
+        {
+            Logger::Log("Failed to create EGL context");
+        }
+    }
+    void render_frame()
+    {
+        glClearColor(0.f, 0.5f, 0.5f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+        m_egl_context->swap();
+    }
+public:
+    bool create(ANativeWindow* window)
+    {
+        m_render_loop = std::thread(&Renderer::render_loop, this, window);
+        return true;
+    }
+    void destroy()
+    {
+        m_active = false;
+        if (m_render_loop.joinable())
+            m_render_loop.join();
+        m_egl_context->destroy();
+        m_egl_context.reset();
+    }
+};
+
 std::shared_ptr<IMosisService> g_service;
+std::unique_ptr<Renderer> g_renderer;
+
 extern "C"
 JNIEXPORT void JNICALL
 Java_com_omixlab_mosis_MainActivity_serviceConnected(JNIEnv *env, jobject thiz, jobject binder) {
@@ -14,3 +64,23 @@ Java_com_omixlab_mosis_MainActivity_serviceConnected(JNIEnv *env, jobject thiz,
     g_service = IMosisService::fromBinder(spBinder);
     Logger::Log("Service Connected");
 }
+
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_omixlab_mosis_MainActivity_setSurface(JNIEnv *env, jobject thiz, jobject surface) {
+    Logger::Log("setSurface");
+    if (!g_renderer)
+    {
+        g_renderer = std::make_unique<Renderer>();
+        g_renderer->create(ANativeWindow_fromSurface(env, surface));
+    }
+}
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_omixlab_mosis_MainActivity_destroySurface(JNIEnv *env, jobject thiz) {
+    Logger::Log("destroySurface");
+    if (g_renderer)
+    {
+        g_renderer->destroy();
+    }
+}