add window functions and title screen windows

src/window.c

@@ -19,10 +19,12 @@
 *****************************************************************************/
 
 #include "addresses.h"
+#include "rct2.h"
 #include "window.h"
 
 #define RCT2_FIRST_WINDOW		(RCT2_ADDRESS(RCT2_ADDRESS_WINDOW_LIST, rct_window))
 #define RCT2_LAST_WINDOW		(RCT2_GLOBAL(RCT2_ADDRESS_NEW_WINDOW_PTR, rct_window*) - 1)
+#define RCT2_NEW_WINDOW			(RCT2_GLOBAL(RCT2_ADDRESS_NEW_WINDOW_PTR, rct_window*))
 
 // rct2: 0x006ED7B0
 void window_update_all()
@@ -36,4 +38,172 @@ void window_update_all()
 	}
 
 	RCT2_CALLPROC_EBPSAFE(0x006EE411);
+}
+
+/**
+ * Opens a new window.
+ *  rct2: 0x006EACA4
+ *
+ * @param x (ax)
+ * @param y (eax >> 16)
+ * @param width (bx)
+ * @param height (ebx >> 16)
+ * @param events (edx)
+ * @param flags (ch)
+ * @param class (cl)
+ */
+rct_window *window_create(int x, int y, int width, int height, uint32 *event_handlers, rct_windowclass cls, uint16 flags)
+{
+	rct_window *w, *v;
+
+	// Check if there are any window slots left
+	if (RCT2_NEW_WINDOW == &(RCT2_FIRST_WINDOW[12])) {
+		// Close least recently used window
+		for (w = RCT2_FIRST_WINDOW; w < RCT2_NEW_WINDOW; w++)
+			if (!(w->flags & 0x203))
+				break;
+
+		window_close(w);
+	}
+
+	w = RCT2_NEW_WINDOW;
+
+	// Flags
+	if (flags & 0x01) {
+		for (; w >= RCT2_FIRST_WINDOW + 1; w--)
+			if (((w - 1)->flags & 0x01) && !((w - 1)->flags & 0x02))
+				break;
+	}
+	else if (flags & 0x02) {
+		for (; w >= RCT2_FIRST_WINDOW + 1; w--)
+			if (!((w - 1)->flags & 0x02))
+				break;
+	}
+
+	// Move w to new window slot
+	if (w != RCT2_NEW_WINDOW)
+		*RCT2_NEW_WINDOW = *w;
+
+	// Setup window
+	w->classification = cls;
+	w->var_4B8 = -1;
+	w->var_4B9 = -1;
+	w->flags = 0;
+	w->flags |= flags;
+
+	// Play sound
+	if (!(flags & 0x03))
+		RCT2_CALLPROC_X(0x006BB76E, 40, x + (width / 2), 0, 0, 0, 0, 0);
+
+	w->number = 0;
+	w->x = x;
+	w->y = y;
+	w->width = width;
+	w->height = height;
+	w->viewport = NULL;
+	w->event_handlers = event_handlers;
+	w->enabled_widgets = 0;
+	w->disabled_widgets = 0;
+	w->pressed_widgets = 0;
+	w->var_020 = 0;
+	w->var_480 = 0;
+	w->var_482 = 0;
+	w->var_484 = 0;
+	w->var_486 = 0;
+	w->var_488 = 0;
+	w->var_48A = 0;
+	w->var_48C = 0;
+	w->var_48E = 0;
+	w->var_490 = 0;
+	w->var_492 = 0;
+	w->var_4AC = 0;
+	w->var_4AE = 0;
+	RCT2_NEW_WINDOW++;
+
+	return w;
+}
+
+/**
+ * Closes the specified window.
+ *  rct2: 0x006ECD4C
+ *
+ * @param window The window to close (esi).
+ */
+void window_close(rct_window* window)
+{
+	int num_windows;
+
+	if (window == NULL)
+		return;
+
+	// Call close event of window
+	// window_call_basic_event(window, WE_CLOSE);
+
+	window = window_find_by_id(window->classification, window->number);
+
+	// Remove viewport
+	if (window->viewport != NULL) {
+		window->viewport->width = 0;
+		window->viewport = NULL;
+	}
+
+	// Invalidate the window (area)
+	window_invalidate(window);
+
+	// Remove window from list and reshift all windows
+	RCT2_NEW_WINDOW--;
+	num_windows = (RCT2_NEW_WINDOW - window);
+	if (num_windows > 0)
+		memmove(window, window + 1, num_windows * sizeof(rct_window));
+
+	// ?
+	RCT2_CALLPROC(0x006EE510);
+}
+
+/**
+ *
+ *  rct2: 0x006EA8A0
+ * @param cls (cl)
+ * @param number (dx)
+ */
+rct_window *window_find_by_id(rct_windowclass cls, rct_windownumber number)
+{
+	rct_window *w;
+
+	if (cls & 0x80) {
+		for (w = RCT2_FIRST_WINDOW; w < RCT2_NEW_WINDOW; w++)
+			if (w->classification == cls)
+				return w;
+	} else {
+		for (w = RCT2_FIRST_WINDOW; w < RCT2_NEW_WINDOW; w++)
+			if (w->classification == cls && w->number == number)
+				return w;
+	}
+
+	return NULL;
+}
+
+/**
+ * Invalidates the specified window.
+ *  rct2: 0x006EB31A
+ *
+ * @param window The window to invalidate (esi).
+ */
+void window_invalidate(rct_window *window)
+{
+	RCT2_CALLPROC_X(0x006EB31A, 0, 0, 0, 0, window, 0, 0);
+
+	// if (window != NULL)
+	//	gfx_set_dirty_blocks(window->x, window->y, window->x + window->width, window->y + window->height);
+}
+
+/**
+ * Invalidates the specified window.
+ *  rct2: 0x006EAEB8
+ *
+ * @param window The window (esi).
+ */
+void window_init_scroll_widgets(rct_window *w)
+{
+	RCT2_CALLPROC_X(0x006EAEB8, 0, 0, 0, 0, w, 0, 0);
 }