Move input functions and add an address

src/addresses.h

@@ -169,8 +169,10 @@
 #define RCT2_ADDRESS_DSOUND_DEVICES_COUNTER			0x009E2BAC
 
 #define RCT2_ADDRESS_CMDLINE						0x009E2D98
-#define RCT2_ADDRESS_MOUSE_READ_INDEX                           0x009E2DE8
-#define RCT2_ADDRESS_MOUSE_WRITE_INDEX                          0x009E2DE4
+
+#define RCT2_ADDRESS_MOUSE_READ_INDEX				0x009E2DE8
+#define RCT2_ADDRESS_MOUSE_WRITE_INDEX				0x009E2DE4
+
 #define RCT2_ADDRESS_LAND_RAISE_COST				0x009E2E1C
 #define RCT2_ADDRESS_LAND_LOWER_COST				0x009E2E20
 #define RCT2_ADDRESS_SELECTED_TERRAIN_EDGE			0x009E2E24
@@ -406,6 +408,8 @@
 #define RCT2_ADDRESS_SCREEN_CAP_BPP					0x01423C10
 #define RCT2_ADDRESS_SCREEN_CAP_RASTER_STRETCH		0x01423C14
 
+#define RCT2_ADDRESS_INPUT_QUEUE					0x01424340
+
 static void RCT2_CALLPROC_EBPSAFE(int address)
 {
 	#ifdef _MSC_VER

src/input.c

@@ -36,6 +36,13 @@
 
 POINT _dragPosition;
 
+typedef struct {
+	uint32 x, y;
+	uint32 state; //1 = LeftDown 2 = LeftUp 3 = RightDown 4 = RightUp
+} rct_mouse_data;
+
+rct_mouse_data* mouse_buffer = RCT2_ADDRESS(RCT2_ADDRESS_INPUT_QUEUE, rct_mouse_data);
+
 static void game_get_next_input(int *x, int *y, int *state);
 static void input_mouseover(int x, int y, rct_window *w, int widgetIndex);
 static void input_mouseover_widget_check(rct_windowclass windowClass, rct_windownumber windowNumber, int widgetIndex);
@@ -43,7 +50,7 @@ static void input_mouseover_widget_flatbutton_invalidate();
 void process_mouse_over(int x, int y);
 void sub_6ED801(int x, int y);
 void invalidate_scroll();
-static openrct2_mouse_data* get_mouse_input();
+static rct_mouse_data* get_mouse_input();
 
 #pragma region Scroll bar input
 
@@ -1558,7 +1565,7 @@ void game_handle_input()
  */
 static void game_get_next_input(int *x, int *y, int *state)
 {
-	openrct2_mouse_data* eax = get_mouse_input();
+	rct_mouse_data* eax = get_mouse_input();
 	if (eax == NULL) {
 		*x = gCursorState.x;
 		*y = gCursorState.y;
@@ -1764,16 +1771,38 @@ void invalidate_scroll()
 	window_invalidate_by_id(RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WINDOWCLASS, uint8), RCT2_GLOBAL(RCT2_ADDRESS_CURSOR_DOWN_WINDOWNUMBER, uint16));
 }
 
+/**
+* rct2: 0x00406C96
+*/
+void store_mouse_input(int state)
+{
+	uint32 write_index = RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32);
+	uint32 next_write_index = (write_index + 1) % 64;
+
+	// check if the queue is full
+	if (next_write_index == RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32))
+		return;
+
+	rct_mouse_data* item = &mouse_buffer[write_index];
+	item->x = RCT2_GLOBAL(0x01424318, uint32);
+	item->y = RCT2_GLOBAL(0x0142431C, uint32);
+	item->state = state;
+
+	RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32) = next_write_index;
+}
+
+
 /**
  * rct2: 0x00407074
  */
-static openrct2_mouse_data* get_mouse_input()
+static rct_mouse_data* get_mouse_input()
 {
-	int read_index = RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32);
-	if (read_index != RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32)) {
-		RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32) = (read_index + 1) & 0x3F;
-		return &mouse_buffer[read_index];
-	} else {
+	uint32 read_index = RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32);
+
+	// check if that location has been written to yet
+	if (read_index == RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32))
 		return NULL;
-	}
+
+	RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32) = (read_index + 1) % 64;
+	return &mouse_buffer[read_index];
 }

src/input.h

@@ -24,4 +24,6 @@
 void game_handle_input();
 void game_handle_keyboard_input();
 
+void store_mouse_input(int state);
+
 #endif

src/osinterface.c

@@ -28,6 +28,7 @@
 #include "addresses.h"
 #include "config.h"
 #include "gfx.h"
+#include "input.h"
 #include "osinterface.h"
 #include "screenshot.h"
 #include "window.h"
@@ -40,12 +41,10 @@ openrct2_cursor gCursorState;
 const unsigned char *gKeysState;
 unsigned char *gKeysPressed;
 unsigned int gLastKeyPressed;
-openrct2_mouse_data* mouse_buffer = (openrct2_mouse_data*)0x1424340;
 
 static void osinterface_create_window();
 static void osinterface_close_window();
 static void osinterface_resize(int width, int height);
-static void store_mouse_input(int state);
 
 static SDL_Window *_window;
 static SDL_Surface *_surface;
@@ -598,20 +597,4 @@ int osinterface_ensure_directory_exists(const char *path)
 char osinterface_get_path_separator()
 {
 	return '\\';
-}
-
-/**
- * rct2: 0x00406C96
- */
-static void store_mouse_input(int state)
-{
-	int write_index = RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32);
-	int next_write_index = (write_index + 1) & 0x3F; //64 length buffer
-	
-	if (next_write_index != RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_READ_INDEX, uint32)) {
-		mouse_buffer[write_index].x = RCT2_GLOBAL(0x01424318, uint32);
-		mouse_buffer[write_index].y = RCT2_GLOBAL(0x0142431C, uint32);
-		mouse_buffer[write_index].state = state;
-		RCT2_GLOBAL(RCT2_ADDRESS_MOUSE_WRITE_INDEX, uint32) = next_write_index;
-	}
-}
+}

src/osinterface.h

@@ -66,12 +66,6 @@ typedef struct {
 	int old;
 } openrct2_cursor;
 
-typedef struct {
-	int x, y;
-	int state; //0 = ? 1 = LeftDown 2 = LeftUp 3 = RightDown 4 = RightUp
-} openrct2_mouse_data;
-
-extern openrct2_mouse_data* mouse_buffer;
 extern openrct2_cursor gCursorState;
 extern const unsigned char *gKeysState;
 extern unsigned char *gKeysPressed;