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/*
* Copyright (C) 2021 - Vito Caputo - <vcaputo@pengaru.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
#include <pthread.h>
#include <sys/time.h>
#include <til.h>
/* glimmer is a GTK+-3.0 frontend for rototiller */
extern til_fb_ops_t gtk_fb_ops;
#define DEFAULT_WIDTH 320
#define DEFAULT_HEIGHT 480
#define BOX_SPACING 4
#define NUM_FB_PAGES 3
static struct glimmer_t {
GtkWidget *modules_list;
til_fb_t *fb;
til_settings_t *fb_settings;
til_settings_t *module_settings;
const til_module_t *module;
void *module_context;
pthread_t thread;
struct timeval start_tv;
unsigned ticks_offset; /* XXX: this isn't leveraged currently */
} glimmer;
static unsigned get_ticks(const struct timeval *start, const struct timeval *now, unsigned offset)
{
return (unsigned)((now->tv_sec - start->tv_sec) * 1000 + (now->tv_usec - start->tv_usec) / 1000) + offset;
}
/* TODO: this should probably move into libtil */
static void * glimmer_thread(void *foo)
{
struct timeval now;
for (;;) {
til_fb_page_t *page;
unsigned ticks;
page = til_fb_page_get(glimmer.fb);
gettimeofday(&now, NULL);
ticks = get_ticks(&glimmer.start_tv, &now, glimmer.ticks_offset);
til_module_render(glimmer.module, glimmer.module_context, ticks, &page->fragment);
til_fb_page_put(glimmer.fb, page);
}
}
static void glimmer_go(GtkButton *button, gpointer user_data)
{
int r;
if (glimmer.fb) {
pthread_cancel(glimmer.thread);
pthread_join(glimmer.thread, NULL);
til_quiesce();
glimmer.fb = til_fb_free(glimmer.fb);
glimmer.fb_settings = til_settings_free(glimmer.fb_settings);
glimmer.module_settings = til_settings_free(glimmer.module_settings);
}
/* TODO: translate the GTK+ settings panel values into
* glimmer.{fb,module}_settings
*/
/* For now, construct a simple 640x480 non-fullscreen fb, and
* simply don't do any module setup (those *should* have static builtin
* defaults that at least work on some level.
*/
glimmer.fb_settings = til_settings_new("fullscreen=off,size=640x480");
glimmer.module_settings = til_settings_new("TODO");
r = til_fb_new(>k_fb_ops, glimmer.fb_settings, NUM_FB_PAGES, &glimmer.fb);
if (r < 0) {
puts("fb no go!");
return;
}
gettimeofday(&glimmer.start_tv, NULL);
glimmer.module = til_lookup_module(gtk_combo_box_text_get_active_text(GTK_COMBO_BOX_TEXT(glimmer.modules_list)));
r = til_module_create_context(
glimmer.module,
get_ticks(
&glimmer.start_tv,
&glimmer.start_tv,
glimmer.ticks_offset),
&glimmer.module_context);
if (r < 0) {
puts("context no go!");
return;
}
pthread_create(&glimmer.thread, NULL, glimmer_thread, NULL);
}
static void activate(GtkApplication *app, gpointer user_data)
{
GtkWidget *window, *vbox, *settings, *button;
const til_module_t **modules;
size_t n_modules;
til_get_modules(&modules, &n_modules);
window = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(window), "glimmer");
gtk_window_set_default_size(GTK_WINDOW(window), DEFAULT_WIDTH, DEFAULT_HEIGHT);
vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, BOX_SPACING);
gtk_container_add(GTK_CONTAINER(window), vbox);
glimmer.modules_list = gtk_combo_box_text_new();
for (size_t i = 0; i < n_modules; i++) {
gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(glimmer.modules_list), NULL, modules[i]->name);
/* like rototiller, default to rtv */
if (!strcmp(modules[i]->name, "rtv"))
gtk_combo_box_set_active(GTK_COMBO_BOX(glimmer.modules_list), i);
}
gtk_container_add(GTK_CONTAINER(vbox), glimmer.modules_list);
gtk_box_set_child_packing(
GTK_BOX(vbox),
glimmer.modules_list,
FALSE,
FALSE,
BOX_SPACING * 4, /* FIXME: having the combo box too near the window edge puts the pointer into the scroll-up arrow on click :/ */
GTK_PACK_START);
/* TODO: below the combobox, present framebuffer and the selected module's settings */
settings = gtk_label_new("TODO: fb/module settings here");
gtk_container_add(GTK_CONTAINER(vbox), settings);
gtk_box_set_child_packing(
GTK_BOX(vbox),
settings,
TRUE,
TRUE,
BOX_SPACING,
GTK_PACK_START);
/* button to rototill as configured */
button = gtk_button_new_with_label("Go!");
gtk_container_add(GTK_CONTAINER(vbox), button);
g_signal_connect(button, "clicked", G_CALLBACK(glimmer_go), NULL);
gtk_widget_show_all(window);
}
int main(int argc, char **argv)
{
GtkApplication *app;
int status;
til_init();
app = gtk_application_new("com.pengaru.glimmer", G_APPLICATION_FLAGS_NONE);
g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
status = g_application_run(G_APPLICATION(app), argc, argv);
g_object_unref(app);
til_shutdown();
return status;
}
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