// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "my_application.h" #include <flutter_linux/flutter_linux.h> #include "my_texture.h" #ifdef GDK_WINDOWING_X11 #include <gdk/gdkx.h> #endif #include "flutter/generated_plugin_registrant.h" struct _MyApplication { GtkApplication parent_instance; // Channel to receive texture requests from Flutter. FlMethodChannel* texture_channel; // Texture we've created. MyTexture* texture; FlView* view; }; G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION) // Handle request to create the texture. static FlMethodResponse* handle_create(MyApplication* self, FlMethodCall* method_call) { if (self->texture != nullptr) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Error", "texture already created", nullptr)); } FlValue* args = fl_method_call_get_args(method_call); if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST || fl_value_get_length(args) != 2) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Invalid args", "Invalid create args", nullptr)); } FlValue* width_value = fl_value_get_list_value(args, 0); FlValue* height_value = fl_value_get_list_value(args, 1); if (fl_value_get_type(width_value) != FL_VALUE_TYPE_INT || fl_value_get_type(height_value) != FL_VALUE_TYPE_INT) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Invalid args", "Invalid create args", nullptr)); } FlEngine* engine = fl_view_get_engine(self->view); FlTextureRegistrar* texture_registrar = fl_engine_get_texture_registrar(engine); self->texture = my_texture_new(fl_value_get_int(width_value), fl_value_get_int(height_value), 0x05, 0x53, 0xb1); if (!fl_texture_registrar_register_texture(texture_registrar, FL_TEXTURE(self->texture))) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Error", "Failed to register texture", nullptr)); } // Return the texture ID to Flutter so it can use this texture. g_autoptr(FlValue) id = fl_value_new_int(fl_texture_get_id(FL_TEXTURE(self->texture))); return FL_METHOD_RESPONSE(fl_method_success_response_new(id)); } // Handle request to set the texture color. static FlMethodResponse* handle_set_color(MyApplication* self, FlMethodCall* method_call) { FlValue* args = fl_method_call_get_args(method_call); if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST || fl_value_get_length(args) != 3) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Invalid args", "Invalid setColor args", nullptr)); } FlValue* r_value = fl_value_get_list_value(args, 0); FlValue* g_value = fl_value_get_list_value(args, 1); FlValue* b_value = fl_value_get_list_value(args, 2); if (fl_value_get_type(r_value) != FL_VALUE_TYPE_INT || fl_value_get_type(g_value) != FL_VALUE_TYPE_INT || fl_value_get_type(b_value) != FL_VALUE_TYPE_INT) { return FL_METHOD_RESPONSE(fl_method_error_response_new( "Invalid args", "Invalid setColor args", nullptr)); } FlEngine* engine = fl_view_get_engine(self->view); FlTextureRegistrar* texture_registrar = fl_engine_get_texture_registrar(engine); // Redraw in requested color. my_texture_set_color(self->texture, fl_value_get_int(r_value), fl_value_get_int(g_value), fl_value_get_int(b_value)); // Notify Flutter the texture has changed. fl_texture_registrar_mark_texture_frame_available(texture_registrar, FL_TEXTURE(self->texture)); return FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr)); } // Handle texture requests from Flutter. static void texture_channel_method_cb(FlMethodChannel* channel, FlMethodCall* method_call, gpointer user_data) { MyApplication* self = MY_APPLICATION(user_data); const char* name = fl_method_call_get_name(method_call); if (g_str_equal(name, "create")) { g_autoptr(FlMethodResponse) response = handle_create(self, method_call); fl_method_call_respond(method_call, response, NULL); } else if (g_str_equal(name, "setColor")) { g_autoptr(FlMethodResponse) response = handle_set_color(self, method_call); fl_method_call_respond(method_call, response, NULL); } else { fl_method_call_respond_not_implemented(method_call, NULL); } } // Implements GObject::dispose. static void my_application_dispose(GObject* object) { MyApplication* self = MY_APPLICATION(object); g_clear_object(&self->texture_channel); g_clear_object(&self->texture); G_OBJECT_CLASS(my_application_parent_class)->dispose(object); } // Implements GApplication::activate. static void my_application_activate(GApplication* application) { MyApplication* self = MY_APPLICATION(application); GtkWindow* window = GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application))); gtk_window_set_default_size(window, 1280, 720); gtk_widget_show(GTK_WIDGET(window)); g_autoptr(FlDartProject) project = fl_dart_project_new(); self->view = fl_view_new(project); gtk_widget_show(GTK_WIDGET(self->view)); gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(self->view)); // Create channel to handle texture requests from Flutter. FlEngine* engine = fl_view_get_engine(self->view); g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new(); self->texture_channel = fl_method_channel_new( fl_engine_get_binary_messenger(engine), "samples.flutter.io/texture", FL_METHOD_CODEC(codec)); fl_method_channel_set_method_call_handler( self->texture_channel, texture_channel_method_cb, self, nullptr); fl_register_plugins(FL_PLUGIN_REGISTRY(self->view)); gtk_widget_grab_focus(GTK_WIDGET(self->view)); } static void my_application_class_init(MyApplicationClass* klass) { G_OBJECT_CLASS(klass)->dispose = my_application_dispose; G_APPLICATION_CLASS(klass)->activate = my_application_activate; } static void my_application_init(MyApplication* self) {} MyApplication* my_application_new() { return MY_APPLICATION(g_object_new(my_application_get_type(), "application-id", APPLICATION_ID, "flags", G_APPLICATION_NON_UNIQUE, nullptr)); }