native service, EGL, native test client

src/main/cpp/egl_context.cpp

@@ -0,0 +1,78 @@
+#include "egl_context.h"
+#include "logger.h"
+#include <glad/gles2.h>
+#include <glad/egl.h>
+
+bool egl::Context::create()
+{
+    int version = gladLoaderLoadEGL(EGL_NO_DISPLAY);
+    if (version == 0)
+    {
+        Logger::Log("glad failed to load EGL");
+        return false;
+    }
+    if (m_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+            m_display == EGL_NO_DISPLAY)
+    {
+        Logger::Log("eglGetDisplay failed");
+        return false;
+    }
+    EGLint major, minor;
+    if (!eglInitialize(m_display, &major, &minor))
+    {
+        Logger::Log("eglInitialize failed");
+        return false;
+    }
+    version = gladLoaderLoadEGL(EGL_DEFAULT_DISPLAY);
+    const EGLint config_attribs[] =
+    {
+        EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
+        EGL_NONE,
+    };
+    EGLint num_configs;
+    if (!eglChooseConfig(m_display, config_attribs, &m_config, 1, &num_configs) || num_configs == 0)
+    {
+        Logger::Log("eglChooseConfig failed");
+        return false;
+    }
+    const EGLint context_attribs[] =
+    {
+        EGL_CONTEXT_MAJOR_VERSION, 3,
+        EGL_CONTEXT_MINOR_VERSION, 2,
+        EGL_NONE,
+    };
+    if (m_context = eglCreateContext(m_display, m_config, EGL_NO_CONTEXT, context_attribs);
+        m_context == EGL_NO_CONTEXT)
+    {
+        Logger::Log("eglCreateContext failed");
+        return false;
+    }
+    if (!eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, m_context))
+    {
+        Logger::Log("eglMakeCurrent failed");
+        return false;
+    }
+    return true;
+}
+
+void egl::Context::destroy()
+{
+    if (m_display != EGL_NO_DISPLAY)
+    {
+        eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+        if (m_context != EGL_NO_CONTEXT)
+        {
+            eglDestroyContext(m_display, m_context);
+        }
+        eglTerminate(m_display);
+    }
+    m_display = EGL_NO_DISPLAY;
+    m_context = EGL_NO_CONTEXT;
+}
+
+egl::Context::Context()
+    : m_display(EGL_NO_DISPLAY), m_config(EGL_NO_CONFIG_KHR), m_context(EGL_NO_CONTEXT)
+{
+    Logger::Log("egl::Context::Context");
+}