641 lines
19 KiB
C
641 lines
19 KiB
C
#include <gtk/gtk.h>
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#include <epoxy/gl.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <Core/gb.h>
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#include "settings.h"
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#include "shader.h"
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#define str(x) #x
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#define xstr(x) str(x)
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typedef struct UserData {
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bool fullscreen;
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GFile *file;
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gchar *bootrom_path;
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gchar *config_path;
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GB_model_t model;
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} UserData;
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typedef struct{
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int16_t x, y;
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uint16_t w, h;
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} Rect;
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static void run(UserData *user_data);
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static GtkApplication *main_application;
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static GtkBuilder *builder;
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static GtkApplicationWindow *main_window;
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static GtkGLArea *gl_area;
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static shader_t shader;
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static GB_gameboy_t gb;
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static uint32_t *image_buffers[3];
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static unsigned char current_buffer;
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static bool paused = false;
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static bool underclock_down = false, rewind_down = false, do_rewind = false, rewind_paused = false, turbo_down = false;
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static double clock_mutliplier = 1.0;
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static char *battery_save_path_ptr;
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static Rect rect;
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static bool running = true;
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static unsigned char number_of_buffers(void) {
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bool should_blend = true;
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return should_blend? 3 : 2;
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}
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static void flip(void) {
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current_buffer = (current_buffer + 1) % number_of_buffers();
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}
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static uint32_t *get_pixels(void) {
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return image_buffers[(current_buffer + 1) % number_of_buffers()];
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}
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static uint32_t *get_current_buffer(void) {
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return image_buffers[current_buffer];
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}
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static uint32_t *get_previous_buffer(void) {
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return image_buffers[(current_buffer + 2) % number_of_buffers()];
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}
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static void render_texture(void *pixels, void *previous) {
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static void *_pixels = NULL;
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if (pixels) {
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_pixels = pixels;
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}
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glClearColor(0, 0, 0, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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render_bitmap_with_shader(&shader, _pixels, previous, GB_get_screen_width(&gb), GB_get_screen_height(&gb), rect.x, rect.y, rect.w, rect.h);
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}
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static void vblank(GB_gameboy_t *gb) {
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flip();
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GB_set_pixels_output(gb, get_pixels());
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// Queue drawing of the current frame
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gtk_gl_area_queue_render(gl_area);
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while (gtk_events_pending()) {
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gtk_main_iteration();
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}
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}
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static void update_viewport(void) {
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int win_width = gtk_widget_get_allocated_width(GTK_WIDGET(gl_area));
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int win_height = gtk_widget_get_allocated_height(GTK_WIDGET(gl_area));
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double x_factor = win_width / (double) GB_get_screen_width(&gb);
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double y_factor = win_height / (double) GB_get_screen_height(&gb);
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if (config.use_integer_scaling) {
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x_factor = (int)(x_factor);
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y_factor = (int)(y_factor);
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}
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if (config.keep_aspect_ratio) {
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if (x_factor > y_factor) {
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x_factor = y_factor;
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}
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else {
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y_factor = x_factor;
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}
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}
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unsigned new_width = x_factor * GB_get_screen_width(&gb);
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unsigned new_height = y_factor * GB_get_screen_height(&gb);
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rect = (Rect){
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(win_width - new_width) / 2,
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(win_height - new_height) / 2,
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new_width,
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new_height
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};
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glViewport(rect.x, rect.y, rect.w, rect.h);
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}
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// Determines if a ComboBox entry should be converted into a separator.
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// Each element with a text value of `<separator>` will be converted into a separator element.
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static gboolean is_separator(GtkTreeModel *model, GtkTreeIter *iter, gpointer data) {
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gchar *text = NULL;
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gtk_tree_model_get(model, iter, 0, &text, -1);
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gboolean result = g_strcmp0("<separator>", text) == 0;
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return result;
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}
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// Recursively goes through all children of the given container and sets
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// our `is_separator` function to all children of type`GtkComboBox`
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static void set_combo_box_row_separator_func(GtkContainer *container) {
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GList *list = gtk_container_get_children(container);
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while (list) {
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if (GTK_IS_COMBO_BOX(list->data)) {
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gtk_combo_box_set_row_separator_func(GTK_COMBO_BOX(list->data), is_separator, NULL, NULL);
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}
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if (GTK_IS_CONTAINER(list->data)) {
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set_combo_box_row_separator_func(GTK_CONTAINER(list->data));
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}
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list = list->next;
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}
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g_list_free_full(list, NULL);
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}
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// Returns true if the application should show a menubar
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static gboolean show_menubar(void) {
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GtkSettings *settings = gtk_settings_get_default();
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gboolean result;
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g_object_get(settings, "gtk-shell-shows-menubar", &result, NULL);
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return result;
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}
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// Returns a GObject by ID from our GtkBuilder instance
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static GObject *get_object(gchararray id) {
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return gtk_builder_get_object(builder, id);
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}
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// Returns a `GApplication`s `GMenuModel` by ID
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// GApplication menus are loaded from `gtk/menus.ui`, `gtk/menus-traditional.ui` and `gtk/menus-common.ui`.
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static GMenuModel *get_menu_model(GApplication *app, const char *id) {
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GMenu *menu;
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menu = gtk_application_get_menu_by_id(GTK_APPLICATION(app), id);
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return menu ? G_MENU_MODEL(g_object_ref_sink(menu)) : NULL;
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}
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static void quit(GApplication *app) {
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g_application_quit(app);
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running = false;
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}
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// app.quit GAction
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// Exits the application
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static void activate_quit(GSimpleAction *action, GVariant *parameter, gpointer user_data) {
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quit(G_APPLICATION(user_data));
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}
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// app.about GAction
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// Opens the about dialog
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static void activate_about(GSimpleAction *action, GVariant *parameter, gpointer user_data) {
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GObject *dialog = get_object("about_dialog");
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gtk_dialog_run(GTK_DIALOG(dialog));
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gtk_widget_hide(GTK_WIDGET(dialog));
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}
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// app.open_gtk_debugger GAction
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// Opens the GTK debugger
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static void activate_open_gtk_debugger(GSimpleAction *action, GVariant *parameter, gpointer user_data) {
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gtk_window_set_interactive_debugging(true);
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}
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// app.preferences GAction
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// Opens the preferences window
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static void activate_preferences(GSimpleAction *action, GVariant *parameter, gpointer user_data) {
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gtk_widget_show_all(GTK_WIDGET(get_object("preferences")));
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}
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// List of GActions for the `app` prefix
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static GActionEntry app_entries[] = {
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{ "quit", activate_quit, NULL, NULL, NULL },
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{ "about", activate_about, NULL, NULL, NULL },
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{ "open_gtk_debugger", activate_open_gtk_debugger, NULL, NULL, NULL },
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{ "preferences", activate_preferences, NULL, NULL, NULL },
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};
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G_MODULE_EXPORT void on_quit(GtkWidget *w, gpointer app) {
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quit(G_APPLICATION(app));
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}
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G_MODULE_EXPORT void on_show_window(GtkWidget *w, gpointer window) {
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gtk_widget_show_all(GTK_WIDGET(window));
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}
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G_MODULE_EXPORT void on_boot_rom_location_changed(GtkWidget *w, gpointer user_data_gptr) {
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GtkComboBox *box = GTK_COMBO_BOX(w);
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g_print("Active: %s", gtk_combo_box_get_active_id(box));
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}
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G_MODULE_EXPORT void gl_init() {
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const char *renderer;
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gtk_gl_area_make_current(gl_area);
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if (gtk_gl_area_get_error(gl_area) != NULL) {
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return;
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}
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renderer = (char *) glGetString(GL_RENDERER);
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g_print("GtkGLArea on %s\n", renderer ? renderer : "Unknown");
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if (config.shader == NULL || !init_shader_with_name(&shader, config.shader)) {
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init_shader_with_name(&shader, "NearestNeighbor");
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}
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}
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G_MODULE_EXPORT void gl_resize() {
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update_viewport();
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}
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G_MODULE_EXPORT void gl_draw() {
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render_texture(get_current_buffer(), get_previous_buffer());
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}
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G_MODULE_EXPORT void gl_finish() { }
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// This functions gets called immediately after registration of the GApplication
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static void startup(GApplication *app, gpointer user_data_gptr) {
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UserData *user_data = user_data_gptr;
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init_settings(user_data->config_path);
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builder = gtk_builder_new_from_resource(RESOURCE_PREFIX "ui/window.ui");
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gtk_builder_connect_signals(builder, NULL);
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g_action_map_add_action_entries(G_ACTION_MAP(app), app_entries, G_N_ELEMENTS(app_entries), app);
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GtkWindow *preferences = GTK_WINDOW(get_object("preferences"));
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set_combo_box_row_separator_func(GTK_CONTAINER(preferences));
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GtkWindow *vram_viewer = GTK_WINDOW(get_object("vram_viewer"));
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set_combo_box_row_separator_func(GTK_CONTAINER(vram_viewer));
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// setup main window
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main_window = GTK_APPLICATION_WINDOW(gtk_application_window_new(GTK_APPLICATION(app)));
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gtk_application_window_set_show_menubar(main_window, true);
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// create our renderer area
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gl_area = GTK_GL_AREA(gtk_gl_area_new());
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gtk_gl_area_set_auto_render(gl_area, false);
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g_signal_connect(gl_area, "realize", G_CALLBACK(gl_init), NULL);
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g_signal_connect(gl_area, "render", G_CALLBACK(gl_draw), NULL);
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g_signal_connect(gl_area, "resize", G_CALLBACK(gl_resize), NULL);
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g_signal_connect(gl_area, "unrealize", G_CALLBACK(gl_finish), NULL);
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gtk_container_add(GTK_CONTAINER(main_window), GTK_WIDGET(gl_area));
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// Handle the whole menubar situation …
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if (show_menubar()) {
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// Show a classic menubar
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GMenuModel *menubar = get_menu_model(app, "menubar");
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gtk_application_set_menubar(GTK_APPLICATION(app), menubar);
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}
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else {
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// Attach a custom title bar
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GtkWidget *titlebar = GTK_WIDGET(gtk_builder_get_object(builder, "main_header_bar"));
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gtk_window_set_titlebar(GTK_WINDOW(main_window), titlebar);
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// Disable menubar
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gtk_application_set_menubar(GTK_APPLICATION(app), NULL);
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// Hook menubar up to the hamburger button
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GtkMenuButton *hamburger_button = GTK_MENU_BUTTON(get_object("hamburger_button"));
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GMenuModel *hamburger_menu = get_menu_model(app, "menubar");
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gtk_menu_button_set_menu_model(hamburger_button, hamburger_menu);
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}
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gtk_window_set_title(GTK_WINDOW(main_window), "SameBoy v" xstr(VERSION));
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// Define a set of window icons
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GList *icon_list = NULL;
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static char* icons[] = {
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RESOURCE_PREFIX "logo_256.png",
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RESOURCE_PREFIX "logo_128.png",
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RESOURCE_PREFIX "logo_64.png",
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RESOURCE_PREFIX "logo_48.png",
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RESOURCE_PREFIX "logo_32.png",
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RESOURCE_PREFIX "logo_16.png"
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};
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// Create list of GdkPixbufs
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for (int i = 0; i < (sizeof(icons) / sizeof(const char*)); ++i) {
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GdkPixbuf *icon = gdk_pixbuf_new_from_resource(icons[i], NULL);
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if (!icon) continue;
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icon_list = g_list_prepend(icon_list, icon);
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}
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// Let GTK choose the proper icon
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gtk_window_set_icon_list(GTK_WINDOW(main_window), icon_list);
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// Add missing information to the about dialog
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GtkAboutDialog *about_dialog = GTK_ABOUT_DIALOG(get_object("about_dialog"));
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gtk_about_dialog_set_logo(about_dialog, g_list_nth_data(icon_list, 3)); // reuse the 64x64 icon
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gtk_about_dialog_set_version(about_dialog, "v" xstr(VERSION));
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g_list_free(icon_list);
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}
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// This function gets called when the GApplication gets activated, i.e. it is ready to show widgets.
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static void activate(GApplication *app, gpointer user_data_gptr) {
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UserData *user_data = user_data_gptr;
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if (user_data->fullscreen) {
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gtk_window_fullscreen(GTK_WINDOW(main_window));
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}
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g_signal_connect(main_window, "destroy", G_CALLBACK(on_quit), app);
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gtk_application_add_window(GTK_APPLICATION(app), GTK_WINDOW(main_window));
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gtk_widget_show_all(GTK_WIDGET(main_window));
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// Start the emulation loop.
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// This loop takes care of the GTK main loop.
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run(user_data);
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}
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// This function gets called when there are files to open.
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// Note: When `open` gets called `activate` won’t fire unless we call it ourselves.
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static void open(GApplication *app, GFile **files, gint n_files, const gchar *hint, gpointer user_data_gptr) {
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UserData *user_data = user_data_gptr;
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if (n_files > 1) {
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g_printerr("More than one file specified\n");
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exit(EXIT_FAILURE);
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}
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user_data->file = files[0];
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// We have handled the files, now activate the application
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activate(app, user_data_gptr);
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}
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static void shutdown(GApplication *app, GFile **files, gint n_files, const gchar *hint, gpointer user_data_gptr) {
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g_print("SHUTDOWN\n");
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save_settings();
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free_settings();
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}
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// This function gets called after the parsing of the commandline options has occurred.
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static gint handle_local_options(GApplication *app, GVariantDict *options, gpointer user_data_gptr) {
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UserData *user_data = user_data_gptr;
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guint32 count;
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if (g_variant_dict_lookup(options, "version", "b", &count)) {
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g_print("SameBoy v" xstr(VERSION) "\n");
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return EXIT_SUCCESS;
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}
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if (g_variant_dict_lookup(options, "fullscreen", "b", &count)) {
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user_data->fullscreen = true;
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}
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// Handle model override
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GVariant *model_name_var = g_variant_dict_lookup_value(options, "model", G_VARIANT_TYPE_STRING);
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if (model_name_var != NULL) {
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const gchar *model_name = g_variant_get_string(model_name_var, NULL);
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// TODO: Synchronize with GB_model_t (Core/gb.h)
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if (g_str_has_prefix(model_name, "DMG")) {
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if (g_str_has_suffix(model_name, "-B") || g_strcmp0(model_name, "DMG") == 0) {
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user_data->model = GB_MODEL_DMG_B;
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}
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else {
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user_data->model = GB_MODEL_DMG_B;
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g_printerr("Unsupported revision: %s\nFalling back to DMG-B", model_name);
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}
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}
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else if (g_str_has_prefix(model_name, "SGB")) {
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if (g_str_has_suffix(model_name, "-NTSC") || g_strcmp0(model_name, "SGB") == 0) {
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user_data->model = GB_MODEL_SGB;
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}
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else if (g_str_has_suffix(model_name, "-PAL")) {
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user_data->model = GB_MODEL_SGB | GB_MODEL_PAL_BIT;
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}
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else if (g_str_has_suffix(model_name, "2")) {
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user_data->model = GB_MODEL_SGB2;
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}
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else {
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user_data->model = GB_MODEL_SGB2;
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g_printerr("Unsupported revision: %s\nFalling back to SGB2", model_name);
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}
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}
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else if (g_str_has_prefix(model_name, "CGB")) {
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if (g_str_has_suffix(model_name, "-C")) {
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user_data->model = GB_MODEL_CGB_C;
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}
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else if (g_str_has_suffix(model_name, "-E") || g_strcmp0(model_name, "CGB") == 0) {
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user_data->model = GB_MODEL_CGB_E;
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}
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else {
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user_data->model = GB_MODEL_CGB_E;
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g_printerr("Unsupported revision: %s\nFalling back to CGB-E", model_name);
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}
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}
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else if (g_str_has_prefix(model_name, "AGB")) {
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user_data->model = GB_MODEL_AGB;
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}
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else {
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g_printerr("Unknown model: %s\n", model_name);
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exit(EXIT_FAILURE);
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}
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}
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return -1;
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}
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static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b) {
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// We use GL_RGBA and GL_UNSIGNED_BYTE for our texture upload,
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// so OpenGL expects pixel data in RGBA order in memory.
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#ifdef GB_LITTLE_ENDIAN
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// ABGR
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uint32_t color = 0xFF000000 | (b << 16) | (g << 8) | r;
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#else
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// RGBA
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uint32_t color = (r << 24) | (g << 16) | (b << 8) | 0xFF;
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#endif
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return color;
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}
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static void update_window_geometry() {
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// Set size hints
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GdkGeometry hints;
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hints.min_width = GB_get_screen_width(&gb);
|
||
hints.min_height = GB_get_screen_height(&gb);
|
||
|
||
gtk_window_set_geometry_hints(
|
||
GTK_WINDOW(main_window),
|
||
NULL,
|
||
&hints,
|
||
(GdkWindowHints)(GDK_HINT_MIN_SIZE)
|
||
);
|
||
|
||
gtk_window_resize(GTK_WINDOW(main_window),
|
||
GB_get_screen_width(&gb) * 2,
|
||
GB_get_screen_height(&gb) * 2
|
||
);
|
||
|
||
// Setup our image buffers
|
||
if (image_buffers[0]) free(image_buffers[0]);
|
||
if (image_buffers[1]) free(image_buffers[1]);
|
||
if (image_buffers[2]) free(image_buffers[2]);
|
||
|
||
size_t buffer_size = sizeof(image_buffers[0][0]) * GB_get_screen_width(&gb) * GB_get_screen_height(&gb);
|
||
|
||
image_buffers[0] = malloc(buffer_size);
|
||
image_buffers[1] = malloc(buffer_size);
|
||
image_buffers[2] = malloc(buffer_size);
|
||
}
|
||
|
||
static void run(UserData *user_data) {
|
||
GB_model_t prev_model = GB_get_model(&gb);
|
||
GB_model_t model = user_data->model? user_data->model : GB_MODEL_CGB_E; // TODO: Model from config
|
||
|
||
if (GB_is_inited(&gb)) {
|
||
GB_switch_model_and_reset(&gb, model);
|
||
|
||
GtkRequisition minimum_size;
|
||
GtkRequisition natural_size;
|
||
gtk_widget_get_preferred_size(GTK_WIDGET(main_window), &minimum_size, &natural_size);
|
||
|
||
// Check SGB -> non-SGB and non-SGB to SGB transitions
|
||
if (GB_get_screen_width(&gb) != minimum_size.width || GB_get_screen_height(&gb) != minimum_size.height) {
|
||
update_window_geometry();
|
||
}
|
||
}
|
||
else {
|
||
GB_init(&gb, model);
|
||
update_window_geometry();
|
||
|
||
GB_set_vblank_callback(&gb, (GB_vblank_callback_t) vblank);
|
||
GB_set_pixels_output(&gb, get_current_buffer());
|
||
GB_set_rgb_encode_callback(&gb, rgb_encode);
|
||
// GB_set_sample_rate(&gb, have_aspec.freq);
|
||
// GB_set_color_correction_mode(&gb, configuration.color_correction_mode);
|
||
// GB_set_highpass_filter_mode(&gb, configuration.highpass_mode);
|
||
GB_set_rewind_length(&gb, config.rewind_duration);
|
||
// GB_set_update_input_hint_callback(&gb, handle_events);
|
||
// GB_apu_set_sample_callback(&gb, gb_audio_callback);
|
||
}
|
||
|
||
GError *error;
|
||
char *boot_rom_path;
|
||
GBytes *boot_rom_f;
|
||
const guchar *boot_rom_data;
|
||
gsize boot_rom_size;
|
||
|
||
if (user_data->bootrom_path) {
|
||
g_print("Trying to load boot ROM from %s\n", user_data->bootrom_path);
|
||
if (GB_load_boot_rom(&gb, user_data->bootrom_path)) {
|
||
g_printerr("Falling back to internal boot ROM\n");
|
||
goto internal_bootrom;
|
||
}
|
||
}
|
||
else { internal_bootrom:
|
||
switch (model) {
|
||
case GB_MODEL_DMG_B:
|
||
boot_rom_path = RESOURCE_PREFIX "bootroms/dmg_boot.bin";
|
||
break;
|
||
|
||
case GB_MODEL_SGB:
|
||
case GB_MODEL_SGB_PAL:
|
||
case GB_MODEL_SGB_NO_SFC:
|
||
boot_rom_path = RESOURCE_PREFIX "bootroms/sgb_boot.bin";
|
||
break;
|
||
|
||
case GB_MODEL_SGB2:
|
||
case GB_MODEL_SGB2_NO_SFC:
|
||
boot_rom_path = RESOURCE_PREFIX "bootroms/sgb2_boot.bin";
|
||
break;
|
||
|
||
case GB_MODEL_CGB_C:
|
||
case GB_MODEL_CGB_E:
|
||
boot_rom_path = RESOURCE_PREFIX "bootroms/cgb_boot.bin";
|
||
break;
|
||
|
||
case GB_MODEL_AGB:
|
||
boot_rom_path = RESOURCE_PREFIX "bootroms/agb_boot.bin";
|
||
break;
|
||
}
|
||
|
||
boot_rom_f = g_resources_lookup_data(boot_rom_path, G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
|
||
|
||
if (boot_rom_f == NULL) {
|
||
g_printerr("Failed to load internal boot ROM: %s\n", boot_rom_path);
|
||
g_error_free(error);
|
||
exit(EXIT_FAILURE);
|
||
}
|
||
|
||
boot_rom_data = g_bytes_get_data(boot_rom_f, &boot_rom_size);
|
||
GB_load_boot_rom_from_buffer(&gb, boot_rom_data, boot_rom_size);
|
||
}
|
||
|
||
if (user_data->file != NULL) {
|
||
GB_load_rom(&gb, g_file_get_path(user_data->file));
|
||
}
|
||
|
||
/* Run emulation */
|
||
while (running) {
|
||
if (paused || rewind_paused) {
|
||
while (gtk_events_pending()) {
|
||
gtk_main_iteration();
|
||
}
|
||
}
|
||
else {
|
||
if (do_rewind) {
|
||
GB_rewind_pop(&gb);
|
||
if (turbo_down) {
|
||
GB_rewind_pop(&gb);
|
||
}
|
||
if (!GB_rewind_pop(&gb)) {
|
||
rewind_paused = true;
|
||
}
|
||
do_rewind = false;
|
||
}
|
||
GB_run(&gb);
|
||
}
|
||
}
|
||
}
|
||
|
||
int main(int argc, char *argv[]) {
|
||
// Create our GApplication and tell GTK that we are able to handle files
|
||
main_application = gtk_application_new(APP_ID, G_APPLICATION_HANDLES_OPEN);
|
||
|
||
UserData user_data = { NULL };
|
||
|
||
// Define our command line parameters
|
||
GOptionEntry entries[] = {
|
||
{ "version", 'v', G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, NULL, "Show the application version", NULL },
|
||
{ "fullscreen", 'f', G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, NULL, "Start in fullscreen mode", NULL },
|
||
{ "bootrom", 'b', G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &user_data.bootrom_path, "Path to the boot ROM to use", "<file path>" },
|
||
{ "model", 'm', G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, NULL, "Override the model type to emulate", "<model type>" },
|
||
{ "config", 'c', G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &user_data.config_path, "Override the path of the configuration file", "<file path>" },
|
||
{ NULL }
|
||
};
|
||
// Setup our command line information
|
||
g_application_add_main_option_entries(G_APPLICATION(main_application), entries);
|
||
g_application_set_option_context_parameter_string(G_APPLICATION(main_application), "[FILE…]");
|
||
g_application_set_option_context_summary(G_APPLICATION(main_application), "SameBoy is an open source Game Boy (DMG) and Game Boy Color (CGB) emulator.");
|
||
|
||
// Add signal handlers
|
||
g_signal_connect(main_application, "handle-local-options", G_CALLBACK(handle_local_options), &user_data);
|
||
g_signal_connect(main_application, "startup", G_CALLBACK(startup), &user_data);
|
||
g_signal_connect(main_application, "activate", G_CALLBACK(activate), &user_data);
|
||
g_signal_connect(main_application, "open", G_CALLBACK(open), &user_data);
|
||
g_signal_connect(main_application, "shutdown", G_CALLBACK(shutdown), &user_data);
|
||
|
||
// Start our GApplication main loop
|
||
int status = g_application_run(G_APPLICATION(main_application), argc, argv);
|
||
g_object_unref(main_application);
|
||
|
||
return status;
|
||
}
|