ghishadow · March 27, 2025 01:57 · Jun 23, 2019 · Aug 31, 2018 · Aug 23, 2017 · Aug 22, 2017
diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -90,8 +90,6 @@ bool RunFlutter(GLFWwindow *window) {
   FlutterProjectArgs args = {
       .struct_size = sizeof(FlutterProjectArgs),
       .assets_path = MY_PROJECT "/build/fluttter_assets", // This directory is generated by `flutter build bundle`
-      .main_path = "", // Used only for Dart 1.
-      .packages_path = "", // Used only for Dart 1.
       .icu_data_path = "path_to/icudtl.dat", // Find this in your bin/cache directory.
   };
   FlutterEngine engine = nullptr;

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -89,9 +89,10 @@ bool RunFlutter(GLFWwindow *window) {
 #define MY_PROJECT "/Volumes/Mojo/flutter/examples/flutter_gallery"
   FlutterProjectArgs args = {
       .struct_size = sizeof(FlutterProjectArgs),
-      .assets_path = MY_PROJECT "/build/app.flx",
-      .main_path = MY_PROJECT "/lib/main.dart",
-      .packages_path = MY_PROJECT "/.packages",
+      .assets_path = MY_PROJECT "/build/fluttter_assets", // This directory is generated by `flutter build bundle`
+      .main_path = "", // Used only for Dart 1.
+      .packages_path = "", // Used only for Dart 1.
+      .icu_data_path = "path_to/icudtl.dat", // Find this in your bin/cache directory.
   };
   FlutterEngine engine = nullptr;
   auto result = FlutterEngineRun(FLUTTER_ENGINE_VERSION, &config, // renderer

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -23,8 +23,8 @@ void GLFWcursorPositionCallbackAtPhase(GLFWwindow *window,
           std::chrono::high_resolution_clock::now().time_since_epoch())
           .count();
   FlutterEngineSendPointerEvent(
-      reinterpret_cast<FlutterEngine>(glfwGetWindowUserPointer(window)),
-      &event);
+      reinterpret_cast<FlutterEngine>(glfwGetWindowUserPointer(window)), &event,
+      1);
 }
 
 void GLFWcursorPositionCallback(GLFWwindow *window, double x, double y) {

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -5,6 +5,8 @@
 #include <glfw3.h>
 #include <iostream>
 
+static_assert(FLUTTER_ENGINE_VERSION == 1, "");
+
 static const size_t kInitialWindowWidth = 800;
 static const size_t kInitialWindowHeight = 600;
 

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -12,6 +12,7 @@ void GLFWcursorPositionCallbackAtPhase(GLFWwindow *window,
                                        FlutterPointerPhase phase, double x,
                                        double y) {
   FlutterPointerEvent event = {};
+  event.struct_size = sizeof(event);
   event.phase = phase;
   event.x = x;
   event.y = y;
@@ -53,7 +54,8 @@ static void GLFWKeyCallback(GLFWwindow *window, int key, int scancode,
 }
 
 void GLFWwindowSizeCallback(GLFWwindow *window, int width, int height) {
-  FlutterWindowMetricsEvent event;
+  FlutterWindowMetricsEvent event = {};
+  event.struct_size = sizeof(event);
   event.width = width;
   event.height = height;
   event.pixel_ratio = 1.0;
@@ -65,6 +67,7 @@ void GLFWwindowSizeCallback(GLFWwindow *window, int width, int height) {
 bool RunFlutter(GLFWwindow *window) {
   FlutterRendererConfig config = {};
   config.type = kOpenGL;
+  config.open_gl.struct_size = sizeof(config.open_gl);
   config.open_gl.make_current = [](void *userdata) -> bool {
     glfwMakeContextCurrent((GLFWwindow *)userdata);
     return true;
@@ -83,6 +86,7 @@ bool RunFlutter(GLFWwindow *window) {
 
 #define MY_PROJECT "/Volumes/Mojo/flutter/examples/flutter_gallery"
   FlutterProjectArgs args = {
+      .struct_size = sizeof(FlutterProjectArgs),
       .assets_path = MY_PROJECT "/build/app.flx",
       .main_path = MY_PROJECT "/lib/main.dart",
       .packages_path = MY_PROJECT "/.packages",

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -11,16 +11,17 @@ static const size_t kInitialWindowHeight = 600;
 void GLFWcursorPositionCallbackAtPhase(GLFWwindow *window,
                                        FlutterPointerPhase phase, double x,
                                        double y) {
-  FlutterEvent event = {};
-  event.type = kPointer;
-  event.pointer.phase = phase;
-  event.pointer.x = x;
-  event.pointer.y = y;
-  event.pointer.timestamp = // holy fuck
+  FlutterPointerEvent event = {};
+  event.phase = phase;
+  event.x = x;
+  event.y = y;
+  event.timestamp =
       std::chrono::duration_cast<std::chrono::microseconds>(
           std::chrono::high_resolution_clock::now().time_since_epoch())
           .count();
-  FlutterEngineSendEvent(glfwGetWindowUserPointer(window), &event);
+  FlutterEngineSendPointerEvent(
+      reinterpret_cast<FlutterEngine>(glfwGetWindowUserPointer(window)),
+      &event);
 }
 
 void GLFWcursorPositionCallback(GLFWwindow *window, double x, double y) {
@@ -52,11 +53,13 @@ static void GLFWKeyCallback(GLFWwindow *window, int key, int scancode,
 }
 
 void GLFWwindowSizeCallback(GLFWwindow *window, int width, int height) {
-  FlutterEvent event = {};
-  event.type = kWindowMetrics;
-  event.window_metrics.width = width;
-  event.window_metrics.height = height;
-  FlutterEngineSendEvent(glfwGetWindowUserPointer(window), &event);
+  FlutterWindowMetricsEvent event;
+  event.width = width;
+  event.height = height;
+  event.pixel_ratio = 1.0;
+  FlutterEngineSendWindowMetricsEvent(
+      reinterpret_cast<FlutterEngine>(glfwGetWindowUserPointer(window)),
+      &event);
 }
 
 bool RunFlutter(GLFWwindow *window) {

diff --git a/FlutterEmbedderGLFW.cc b/FlutterEmbedderGLFW.cc
@@ -0,0 +1,126 @@
+
+#include <assert.h>
+#include <chrono>
+#include <embedder.h>
+#include <glfw3.h>
+#include <iostream>
+
+static const size_t kInitialWindowWidth = 800;
+static const size_t kInitialWindowHeight = 600;
+
+void GLFWcursorPositionCallbackAtPhase(GLFWwindow *window,
+                                       FlutterPointerPhase phase, double x,
+                                       double y) {
+  FlutterEvent event = {};
+  event.type = kPointer;
+  event.pointer.phase = phase;
+  event.pointer.x = x;
+  event.pointer.y = y;
+  event.pointer.timestamp = // holy fuck
+      std::chrono::duration_cast<std::chrono::microseconds>(
+          std::chrono::high_resolution_clock::now().time_since_epoch())
+          .count();
+  FlutterEngineSendEvent(glfwGetWindowUserPointer(window), &event);
+}
+
+void GLFWcursorPositionCallback(GLFWwindow *window, double x, double y) {
+  GLFWcursorPositionCallbackAtPhase(window, FlutterPointerPhase::kMove, x, y);
+}
+
+void GLFWmouseButtonCallback(GLFWwindow *window, int key, int action,
+                             int mods) {
+  if (key == GLFW_MOUSE_BUTTON_1 && action == GLFW_PRESS) {
+    double x, y;
+    glfwGetCursorPos(window, &x, &y);
+    GLFWcursorPositionCallbackAtPhase(window, FlutterPointerPhase::kDown, x, y);
+    glfwSetCursorPosCallback(window, GLFWcursorPositionCallback);
+  }
+
+  if (key == GLFW_MOUSE_BUTTON_1 && action == GLFW_RELEASE) {
+    double x, y;
+    glfwGetCursorPos(window, &x, &y);
+    GLFWcursorPositionCallbackAtPhase(window, FlutterPointerPhase::kUp, x, y);
+    glfwSetCursorPosCallback(window, nullptr);
+  }
+}
+
+static void GLFWKeyCallback(GLFWwindow *window, int key, int scancode,
+                            int action, int mods) {
+  if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
+    glfwSetWindowShouldClose(window, GLFW_TRUE);
+  }
+}
+
+void GLFWwindowSizeCallback(GLFWwindow *window, int width, int height) {
+  FlutterEvent event = {};
+  event.type = kWindowMetrics;
+  event.window_metrics.width = width;
+  event.window_metrics.height = height;
+  FlutterEngineSendEvent(glfwGetWindowUserPointer(window), &event);
+}
+
+bool RunFlutter(GLFWwindow *window) {
+  FlutterRendererConfig config = {};
+  config.type = kOpenGL;
+  config.open_gl.make_current = [](void *userdata) -> bool {
+    glfwMakeContextCurrent((GLFWwindow *)userdata);
+    return true;
+  };
+  config.open_gl.clear_current = [](void *) -> bool {
+    glfwMakeContextCurrent(nullptr); // is this even a thing?
+    return true;
+  };
+  config.open_gl.present = [](void *userdata) -> bool {
+    glfwSwapBuffers((GLFWwindow *)userdata);
+    return true;
+  };
+  config.open_gl.fbo_callback = [](void *) -> uint32_t {
+    return 0; // FBO0
+  };
+
+#define MY_PROJECT "/Volumes/Mojo/flutter/examples/flutter_gallery"
+  FlutterProjectArgs args = {
+      .assets_path = MY_PROJECT "/build/app.flx",
+      .main_path = MY_PROJECT "/lib/main.dart",
+      .packages_path = MY_PROJECT "/.packages",
+  };
+  FlutterEngine engine = nullptr;
+  auto result = FlutterEngineRun(FLUTTER_ENGINE_VERSION, &config, // renderer
+                                 &args, window, &engine);
+  assert(result == kSuccess && engine != nullptr);
+
+  glfwSetWindowUserPointer(window, engine);
+
+  GLFWwindowSizeCallback(window, kInitialWindowWidth, kInitialWindowHeight);
+
+  return true;
+}
+
+int main(int argc, const char *argv[]) {
+
+  auto result = glfwInit();
+  assert(result == GLFW_TRUE);
+
+  auto window = glfwCreateWindow(kInitialWindowWidth, kInitialWindowHeight,
+                                 "Flutter", NULL, NULL);
+  assert(window != nullptr);
+
+  bool runResult = RunFlutter(window);
+  assert(runResult);
+
+  glfwSetKeyCallback(window, GLFWKeyCallback);
+
+  glfwSetWindowSizeCallback(window, GLFWwindowSizeCallback);
+
+  glfwSetMouseButtonCallback(window, GLFWmouseButtonCallback);
+
+  while (!glfwWindowShouldClose(window)) {
+    std::cout << "Looping..." << std::endl;
+    glfwWaitEvents();
+  }
+
+  glfwDestroyWindow(window);
+  glfwTerminate();
+
+  return EXIT_SUCCESS;
+}