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view src/video/wincommon/SDL_sysmouse.c @ 1192:54aa9aa32327
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Fri, 18 Nov 2005 23:39:02 +0100
Subject: [SDL] Mouse position bugs on Mac OS X
The attached patch fixes a few bugs in SDL related to the mouse position
in windowed mode on Mac OS X, reproduced using the attached minimal test
program - at least here on 10.3.9, with SDL CVS from today. Could anyone
test whether the bugs exist and are fixed by the patch on 10.2 and 10.4?
1. When using OpenGL, the vertical mouse positions obtained through
events or SDL_GetMouseState() are off by one.
2. When using OpenGL, SDL_WarpMouse() inverts the y coordinate.
3. Clicks on the topmost pixel row of the window are not recognized.
1 and 2 do not occur in non-OpenGL mode, while 3 does. All three only
occur in windowed mode, not in fullscreen.
The cause for 1 and 3 is that in Cocoa, "the location of the mouse"
seems to be defined as "the location of the top left corner of the mouse
pointer's hot pixel" (this is not documented, it's just what I found out
here), which together with the fact that Cocoa's usual y coordinates
start at the bottom and increase upwards means that the y coordinate of
the mouse runs from 1 to h, not from 0 to h-1, in a window of height h.
If it does work on 10.2 and 10.4 (I'll try to test it as soon as I can,
but at the moment all I have at hand is 10.3.9), can this be applied to
the CVS?
-Christian
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Mon, 28 Nov 2005 10:41:51 +0100
Subject: [SDL] Re: Mouse position bugs on Mac OS X
I wrote:
> I'll try to test it as soon as I can, but at the moment all I have at hand is 10.3.9
So, here are the results of my tests (with patched and unpatched
frameworks compiled with Xcode 1.5 (gcc 3.3) on 10.3.9):
On 10.1.5, my test program doesn't run because of "Undefined symbols:
SDL undefined reference to _CGMainDisplayID expected to be defined in
Carbon". I guess not supporting 10.1 was a deliberate decision then and
that's OK with me.
On 10.2.8, 10.3.9, and 10.4.0, the bugs exist as described in my
original post and are fixed by my patch. That is, there is no difference
between pre/post 10.3 and the patched version works correctly in all
combinations of GL/non-GL and windowed/fullscreen.
I therefore recommend the patch for inclusion.
-Christian
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Mon, 28 Nov 2005 13:58:26 +0000 |
parents | 5c74ac147358 |
children | 86d0d01290ea |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #include <stdlib.h> #include <windows.h> #include "SDL_error.h" #include "SDL_mouse.h" #include "SDL_sysmouse_c.h" #include "SDL_events_c.h" #include "SDL_cursor_c.h" #include "SDL_lowvideo.h" #ifdef _WIN32_WCE #define USE_STATIC_CURSOR #endif HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */ /* The implementation dependent data for the window manager cursor */ /* For some reason when creating a windows cursor, the ands and xors memory is not copied, so we need to keep track of it and free it when we are done with the cursor. If we free the memory prematurely, the app crashes. :-} */ struct WMcursor { HCURSOR curs; #ifndef USE_STATIC_CURSOR Uint8 *ands; Uint8 *xors; #endif }; /* Convert bits to padded bytes */ #define PAD_BITS(bits) ((bits+7)/8) #ifdef CURSOR_DEBUG static void PrintBITMAP(FILE *out, char *bits, int w, int h) { int i; unsigned char ch; while ( h-- > 0 ) { for ( i=0; i<w; ++i ) { if ( (i%8) == 0 ) ch = *bits++; if ( ch&0x80 ) fprintf(out, "X"); else fprintf(out, " "); ch <<= 1; } fprintf(out, "\n"); } } #endif #ifndef USE_STATIC_CURSOR /* Local functions to convert the SDL cursor mask into Windows format */ static void memnot(Uint8 *dst, Uint8 *src, int len) { while ( len-- > 0 ) *dst++ = ~*src++; } static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len) { while ( len-- > 0 ) *dst++ = (*src1++)^(*src2++); } #endif /* !USE_STATIC_CURSOR */ void WIN_FreeWMCursor(_THIS, WMcursor *cursor) { #ifndef USE_STATIC_CURSOR if ( cursor->curs == GetCursor() ) SetCursor(NULL); if ( cursor->curs != NULL ) DestroyCursor(cursor->curs); if ( cursor->ands != NULL ) free(cursor->ands); if ( cursor->xors != NULL ) free(cursor->xors); #endif /* !USE_STATIC_CURSOR */ free(cursor); } WMcursor *WIN_CreateWMCursor(_THIS, Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) { #ifdef USE_STATIC_CURSOR WMcursor *cursor; /* Allocate the cursor */ cursor = (WMcursor *)malloc(sizeof(*cursor)); if ( cursor ) { cursor->curs = LoadCursor(NULL, IDC_ARROW); } return(cursor); #else WMcursor *cursor; int allowed_x; int allowed_y; int run, pad, i; Uint8 *aptr, *xptr; /* Check to make sure the cursor size is okay */ allowed_x = GetSystemMetrics(SM_CXCURSOR); allowed_y = GetSystemMetrics(SM_CYCURSOR); if ( (w > allowed_x) || (h > allowed_y) ) { SDL_SetError("Only cursors of dimension (%dx%d) are allowed", allowed_x, allowed_y); return(NULL); } /* Allocate the cursor */ cursor = (WMcursor *)malloc(sizeof(*cursor)); if ( cursor == NULL ) { SDL_SetError("Out of memory"); return(NULL); } cursor->curs = NULL; cursor->ands = NULL; cursor->xors = NULL; /* Pad out to the normal cursor size */ run = PAD_BITS(w); pad = PAD_BITS(allowed_x)-run; aptr = cursor->ands = (Uint8 *)malloc((run+pad)*allowed_y); xptr = cursor->xors = (Uint8 *)malloc((run+pad)*allowed_y); if ( (aptr == NULL) || (xptr == NULL) ) { WIN_FreeWMCursor(NULL, cursor); SDL_OutOfMemory(); return(NULL); } for ( i=0; i<h; ++i ) { memxor(xptr, data, mask, run); xptr += run; data += run; memnot(aptr, mask, run); mask += run; aptr += run; memset(xptr, 0, pad); xptr += pad; memset(aptr, ~0, pad); aptr += pad; } pad += run; for ( ; i<allowed_y; ++i ) { memset(xptr, 0, pad); xptr += pad; memset(aptr, ~0, pad); aptr += pad; } /* Create the cursor */ cursor->curs = CreateCursor( (HINSTANCE)GetWindowLong(SDL_Window, GWL_HINSTANCE), hot_x, hot_y, allowed_x, allowed_y, cursor->ands, cursor->xors); if ( cursor->curs == NULL ) { WIN_FreeWMCursor(NULL, cursor); SDL_SetError("Windows couldn't create the requested cursor"); return(NULL); } return(cursor); #endif /* USE_STATIC_CURSOR */ } int WIN_ShowWMCursor(_THIS, WMcursor *cursor) { POINT mouse_pos; /* The fullscreen cursor must be done in software with DirectInput */ if ( !this->screen || DDRAW_FULLSCREEN() ) { return(0); } /* Set the window cursor to our cursor, if applicable */ if ( cursor != NULL ) { SDL_hcursor = cursor->curs; } else { SDL_hcursor = NULL; } GetCursorPos(&mouse_pos); if ( PtInRect(&SDL_bounds, mouse_pos) ) { SetCursor(SDL_hcursor); } return(1); } void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) { if ( DDRAW_FULLSCREEN() ) { SDL_PrivateMouseMotion(0, 0, x, y); } else if ( mouse_relative) { /* RJR: March 28, 2000 leave physical cursor at center of screen if mouse hidden and grabbed */ SDL_PrivateMouseMotion(0, 0, x, y); } else { POINT pt; pt.x = x; pt.y = y; ClientToScreen(SDL_Window, &pt); SetCursorPos(pt.x, pt.y); } } /* Update the current mouse state and position */ void WIN_UpdateMouse(_THIS) { RECT rect; POINT pt; if ( ! DDRAW_FULLSCREEN() ) { GetClientRect(SDL_Window, &rect); GetCursorPos(&pt); MapWindowPoints(NULL, SDL_Window, &pt, 1); if (PtInRect(&rect, pt) && (WindowFromPoint(pt) == SDL_Window)){ SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS); SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y); } else { SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS); } } } /* Check to see if we need to enter or leave mouse relative mode */ void WIN_CheckMouseMode(_THIS) { /* If the mouse is hidden and input is grabbed, we use relative mode */ if ( !(SDL_cursorstate & CURSOR_VISIBLE) && (this->input_grab != SDL_GRAB_OFF) ) { mouse_relative = 1; } else { mouse_relative = 0; } }