Refactored OpenGL embedder that works on Android, Mac or Linux.

runtime/embedders/openglui/android/android_graphics_handler.cc

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "embedders/openglui/android/android_graphics_handler.h"
+#include "embedders/openglui/common/log.h"
+
+AndroidGraphicsHandler::AndroidGraphicsHandler(android_app* application)
+    : GLGraphicsHandler(),
+      application_(application),
+      display_(EGL_NO_DISPLAY),
+      surface_(EGL_NO_SURFACE),
+      context_(EGL_NO_CONTEXT) {
+}
+
+int32_t AndroidGraphicsHandler::Start() {
+  EGLint format, numConfigs;
+  EGLConfig config;
+  const EGLint attributes[] = {
+      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+      EGL_NONE
+  };
+  static const EGLint ctx_attribs[] = {
+    EGL_CONTEXT_CLIENT_VERSION, 2,
+    EGL_NONE
+  };
+
+  display_ = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+  if (display_ != EGL_NO_DISPLAY) {
+    LOGI("eglInitialize");
+    if (eglInitialize(display_, NULL, NULL)) {
+      LOGI("eglChooseConfig");
+      if (eglChooseConfig(display_, attributes, &config, 1, &numConfigs) &&
+          numConfigs > 0) {
+        LOGI("eglGetConfigAttrib");
+        if (eglGetConfigAttrib(display_, config,
+                               EGL_NATIVE_VISUAL_ID, &format)) {
+          ANativeWindow_setBuffersGeometry(application_->window, 0, 0, format);
+          surface_ = eglCreateWindowSurface(display_, config,
+                              (EGLNativeWindowType)application_->window, NULL);
+          if (surface_ != EGL_NO_SURFACE) {
+            LOGI("eglCreateContext");
+            context_ = eglCreateContext(display_, config, EGL_NO_CONTEXT,
+                                        ctx_attribs);
+            if (context_ != EGL_NO_CONTEXT) {
+              if (eglMakeCurrent(display_, surface_, surface_, context_) &&
+                  eglQuerySurface(display_, surface_, EGL_WIDTH, &width_) &&
+                  width_ > 0 &&
+                  eglQuerySurface(display_, surface_, EGL_HEIGHT, &height_) &&
+                  height_ > 0) {
+                SetViewport(0, 0, width_, height_);
+                return 0;
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+  LOGE("Error starting graphics");
+  Stop();
+  return -1;
+}
+
+void AndroidGraphicsHandler::Stop() {
+  LOGI("Stopping graphics");
+  if (display_ != EGL_NO_DISPLAY) {
+    eglMakeCurrent(display_, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    if (context_ != EGL_NO_CONTEXT) {
+      eglDestroyContext(display_, context_);
+      context_ = EGL_NO_CONTEXT;
+    }
+    if (surface_ != EGL_NO_SURFACE) {
+      eglDestroySurface(display_, surface_);
+      surface_ = EGL_NO_SURFACE;
+    }
+    eglTerminate(display_);
+    display_ = EGL_NO_DISPLAY;
+  }
+}
+