Win32: Fix issue with SetCapture & negative values.
This fixes an issue where we were using the wrong macros to extract the position from WM_MOUSEMOVE, so negative values were behaving incorrectly.
These would be generated in multimon situations, or if you use SetCapture.
Fixes http://bugzilla.libsdl.org/show_bug.cgi?id=1175
--- a/src/video/windows/SDL_windowsevents.c Wed Jun 05 12:00:15 2013 -0700
+++ b/src/video/windows/SDL_windowsevents.c Wed Jun 05 12:00:18 2013 -0700
@@ -33,6 +33,8 @@
/* Dropfile support */
#include <shellapi.h>
+/* For GET_X_LPARAM, GET_Y_LPARAM. */
+#include <windowsx.h>
/*#define WMMSG_DEBUG*/
#ifdef WMMSG_DEBUG
@@ -381,7 +383,7 @@
case WM_MOUSEMOVE:
if( !SDL_GetMouse()->relative_mode )
- SDL_SendMouseMotion(data->window, 0, 0, LOWORD(lParam), HIWORD(lParam));
+ SDL_SendMouseMotion(data->window, 0, 0, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
/* don't break here, fall through to check the wParam like the button presses */
case WM_LBUTTONUP:
case WM_RBUTTONUP: