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// MIT License, Copyright (c) 2020 Marvin Borner
#include <assert.h>
#include <cpu.h>
#include <def.h>
#include <gui.h>
#include <input.h>
#include <list.h>
#include <mem.h>
#include <print.h>
#include <random.h>
#include <sys.h>
#include <vesa.h>
#define MOUSE_SKIP 4 // => Every nth move gets skipped
static struct vbe *vbe;
static struct window *direct; // Direct video memory window
static struct window *root; // Root window (wallpaper etc.)
static struct window *exchange; // Exchange buffer
static struct window *focused; // The focused window
static struct window *cursor; // Cursor bitmap window
static struct list *windows; // List of all windows
static int mouse_x = 0;
static int mouse_y = 0;
static struct window *new_window(int x, int y, u16 width, u16 height, int flags)
{
struct window *win = malloc(sizeof(*win));
win->x = x;
win->y = y;
win->width = width;
win->height = height;
win->bpp = vbe->bpp;
win->pitch = win->width * (win->bpp >> 3);
win->fb = malloc(height * win->pitch);
win->flags = flags;
return win;
}
static void redraw_all()
{
if (windows->head && windows->head->data) {
struct node *iterator = windows->head;
do {
struct window *win = iterator->data;
gui_win_on_win(exchange, win, win->x, win->y);
} while ((iterator = iterator->next) != NULL);
memcpy(direct->fb, exchange->fb, exchange->pitch * exchange->height);
}
}
int main(int argc, char **argv)
{
(void)argc;
vbe = (struct vbe *)argv[1];
printf("VBE: %dx%d\n", vbe->width, vbe->height);
gui_init("/font/spleen-16x32.psfu");
windows = list_new();
root = new_window(0, 0, vbe->width, vbe->height, WF_NO_FOCUS | WF_NO_DRAG | WF_NO_RESIZE);
exchange =
new_window(0, 0, vbe->width, vbe->height, WF_NO_FOCUS | WF_NO_DRAG | WF_NO_RESIZE);
cursor = new_window(0, 0, 32, 32, WF_NO_FOCUS | WF_NO_RESIZE);
direct = malloc(sizeof(*direct));
memcpy(direct, root, sizeof(*direct));
direct->fb = vbe->fb;
list_add(windows, root);
gui_write(direct, 0, 0, FG_COLOR, "Welcome to Melvix!");
gui_write(direct, 0, 32, FG_COLOR, "Loading resources...");
gui_fill(root, BG_COLOR);
gui_border(root, FG_COLOR, 2);
gui_load_image(cursor, "/res/cursor.bmp", 0, 0);
gui_load_wallpaper(root, "/res/wall.bmp");
redraw_all();
event_register(EVENT_MOUSE);
struct message *msg;
int mouse_skip = 0;
while (1) {
if (!(msg = msg_receive())) {
yield();
continue;
}
switch (msg->type) {
case MSG_NEW_WINDOW:
printf("New window for pid %d\n", msg->src);
struct window *win = new_window(vbe->width / 2 - 500, vbe->height / 2 - 400,
1000, 800, (int)msg->data);
msg_send(msg->src, MSG_NEW_WINDOW, win);
list_add(windows, win);
focused = win;
redraw_all();
break;
case MSG_REDRAW:
redraw_all();
break;
case EVENT_MOUSE: {
struct event_mouse *event = msg->data;
if (event->magic != MOUSE_MAGIC)
break;
mouse_x += event->diff_x;
mouse_y -= event->diff_y;
if (mouse_x < 0)
mouse_x = 0;
else if ((int)(mouse_x + cursor->width) > vbe->width - 1)
mouse_x = vbe->width - cursor->width - 1;
if (mouse_y < 0)
mouse_y = 0;
else if ((int)(mouse_y + cursor->height) > vbe->height - 1)
mouse_y = vbe->height - cursor->height - 1;
gui_copy(direct, exchange, cursor->x, cursor->y, cursor->width,
cursor->height);
cursor->x = mouse_x;
cursor->y = mouse_y;
if (event->but1 && !(focused->flags & WF_NO_DRAG) &&
mouse_y + (int)focused->height < vbe->height - 1 &&
mouse_skip % MOUSE_SKIP == 0) {
mouse_skip = 0;
focused->x = mouse_x;
focused->y = mouse_y;
redraw_all(); // TODO: Function to redraw one window
}
gui_win_on_win(direct, cursor, cursor->x, cursor->y);
mouse_skip++;
break;
}
default:
break;
}
};
return 0;
}
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