src/video/quartz/SDL_QuartzVideo.h
author Ryan C. Gordon <icculus@icculus.org>
Mon, 02 Jan 2006 00:31:00 +0000
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To: sdl@libsdl.org From: Christian Walther <cwalther@gmx.ch> Date: Thu, 15 Dec 2005 21:19:53 +0100 Subject: [SDL] More mouse enhancements for Mac OS X The attached patch brings two more enhancements to mouse handling on Mac OS X (Quartz): 1. Currently, after launching an SDL application, SDL's notion of the mouse position is stuck in the top left corner (0,0) until the first time the mouse is moved. That's because the UpdateMouse() function isn't implemented in the Quartz driver. This patch adds it. 2. When grabbing input while the mouse cursor is hidden, the function CGAssociateMouseAndMouseCursorPosition(0) is called, which prevents the system's notion of the mouse location from moving (and therefore leaving the SDL window) even when the mouse is moved. However, apparently the Wacom tablet driver (and maybe other special pointing device drivers) doesn't care about that setting and still allows the mouse location to go outside of the window. Interestingly, the system cursor, which is made visible by the existing code in SDL in that case, does not follow the mouse location, but appears in the middle of the SDL window. The mouse location being outside of the window however means that mouse button events go to background applications (or the dock or whatever is there), which is very confusing to the user who sees no cursor outside of the SDL window. I have not found any way of intercepting these events (and that's probably by design, as "normal" applications shouldn't prevent the user from bringing other applications' windows to the front by clicking on them). An idea would be placing a fully transparent, screen-filling window in front of everything, but I fear that this might affect rendering performance (by doing unnecessary compositing, using up memory, or whatever). The deluxe solution to the problem would be talking to the tablet driver using AppleEvents to tell it to constrain its mapped area to the window (see Wacom's "TabletEventDemo" sample app, http://www.wacomeng.com/devsupport/mac/downloads.html), but I think that the bloat that solution would add to SDL would outweigh its usefulness. What I did instead in my patch is reassociating mouse and cursor when the mouse leaves the window while an invisible grab is in effect, and restoring the grab when the window is entered. That way, the grab can still be effectively broken by a tablet, but at least it's obvious to the user that it is broken. That change is minimal - it doesn't affect operation with a mouse (or a trackpad), and the code that it adds is not executed on every PumpEvents() call, only when entering and leaving the window. Unless there are any concerns about the patch, please apply. Feel free to shorten the lengthy comment in SDL_QuartzEvents.m if you think it's too verbose. Thanks -Christian
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2003  Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/*    
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    @file   SDL_QuartzVideo.h
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    @author Darrell Walisser, Max Horn, et al.
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    @abstract SDL video driver for Mac OS X.
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    @discussion
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    TODO
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        - Hardware Cursor support with NSCursor instead of Carbon
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        - Keyboard repeat/mouse speed adjust (if needed)
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        - Multiple monitor support (currently only main display)
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        - Accelerated blitting support
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        - Fix white OpenGL window on minimize (fixed) (update: broken again on 10.2)
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        - Find out what events should be sent/ignored if window is minimized
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        - Find a way to deal with external resolution/depth switch while app is running
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        - Check accuracy of QZ_SetGamma()
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    Problems:
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        - OGL not working in full screen with software renderer
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        - SetColors sets palette correctly but clears framebuffer
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        - Crash in CG after several mode switches (I think this has been fixed)
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        - Retained windows don't draw their title bar quite right (OS Bug) (not using retained windows)
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        - Cursor in 8 bit modes is screwy (might just be Radeon PCI bug) (update: not just Radeon)
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        - Warping cursor delays mouse events for a fraction of a second,
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          there is a hack around this that helps a bit
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*/
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#include <Cocoa/Cocoa.h>
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#include <OpenGL/OpenGL.h>
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#include <OpenGL/gl.h>
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#include <OpenGL/glext.h>
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#include <Carbon/Carbon.h>
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#include <QuickTime/QuickTime.h>
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#include <IOKit/IOKitLib.h> /* For powersave handling */
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#include <pthread.h>
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#include "SDL_thread.h"
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#include "SDL_video.h"
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#include "SDL_error.h"
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#include "SDL_timer.h"
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#include "SDL_syswm.h"
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#include "SDL_sysvideo.h"
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#include "SDL_pixels_c.h"
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#include "SDL_events_c.h"
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#include "SDL_loadso.h"
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/* 
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    This is a workaround to directly access NSOpenGLContext's CGL context
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    We need this to check for errors NSOpenGLContext doesn't support
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*/
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@interface NSOpenGLContext (CGLContextAccess)
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- (CGLContextObj) cglContext;
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@end
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/* Main driver structure to store required state information */
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typedef struct SDL_PrivateVideoData {
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    CGDirectDisplayID  display;            /* 0 == main display (only support single display) */
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    CFDictionaryRef    mode;               /* current mode of the display */
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    CFDictionaryRef    save_mode;          /* original mode of the display */
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    CFArrayRef         mode_list;          /* list of available fullscreen modes */
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    CGDirectPaletteRef palette;            /* palette of an 8-bit display */
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    NSOpenGLContext    *gl_context;        /* OpenGL rendering context */
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    Uint32             width, height, bpp; /* frequently used data about the display */
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    Uint32             flags;              /* flags for current mode, for teardown purposes */
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    Uint32             video_set;          /* boolean; indicates if video was set correctly */
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    Uint32             warp_flag;          /* boolean; notify to event loop that a warp just occured */
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    Uint32             warp_ticks;         /* timestamp when the warp occured */
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    NSWindow           *window;            /* Cocoa window to implement the SDL window */
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    NSQuickDrawView    *view;              /* the window's view; draw 2D and OpenGL into this view */
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    SDL_Surface        *resize_icon;       /* icon for the resize badge, we have to draw it by hand */
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    SDL_GrabMode       current_grab_mode;  /* default value is SDL_GRAB_OFF */
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    SDL_Rect           **client_mode_list; /* resolution list to pass back to client */
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    SDLKey             keymap[256];        /* Mac OS X to SDL key mapping */
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    Uint32             current_mods;       /* current keyboard modifiers, to track modifier state */
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    Uint32             last_virtual_button;/* last virtual mouse button pressed */
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    io_connect_t       power_connection;   /* used with IOKit to detect wake from sleep */
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    Uint8              expect_mouse_up;    /* used to determine when to send mouse up events */
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    Uint8              grab_state;         /* used to manage grab behavior */
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    NSPoint            cursor_loc;         /* saved cursor coords, for activate/deactivate when grabbed */
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    BOOL               cursor_should_be_visible;     /* tells if cursor is supposed to be visible (SDL_ShowCursor) */
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    BOOL               cursor_visible;     /* tells if cursor is *actually* visible or not */
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    Uint8*             sw_buffers[2];      /* pointers to the two software buffers for double-buffer emulation */
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    SDL_Thread         *thread;            /* thread for async updates to the screen */
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    SDL_sem            *sem1, *sem2;       /* synchronization for async screen updates */
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    Uint8              *current_buffer;    /* the buffer being copied to the screen */
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    BOOL               quit_thread;        /* used to quit the async blitting thread */
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    SInt32             system_version;     /* used to dis-/enable workarounds depending on the system version */
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    ImageDescriptionHandle yuv_idh;
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    MatrixRecordPtr        yuv_matrix;
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    DecompressorComponent  yuv_codec;
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    ImageSequence          yuv_seq;
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    PlanarPixmapInfoYUV420 *yuv_pixmap;
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    Sint16                  yuv_width, yuv_height;
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    CGrafPtr                yuv_port;
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    void *opengl_library;    /* dynamically loaded OpenGL library. */
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} SDL_PrivateVideoData;
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#define _THIS    SDL_VideoDevice *this
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#define display_id (this->hidden->display)
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#define mode (this->hidden->mode)
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#define save_mode (this->hidden->save_mode)
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#define mode_list (this->hidden->mode_list)
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#define palette (this->hidden->palette)
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#define gl_context (this->hidden->gl_context)
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#define device_width (this->hidden->width)
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#define device_height (this->hidden->height)
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#define device_bpp (this->hidden->bpp)
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#define mode_flags (this->hidden->flags)
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#define qz_window (this->hidden->window)
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#define window_view (this->hidden->view)
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#define video_set (this->hidden->video_set)
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#define warp_ticks (this->hidden->warp_ticks)
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#define warp_flag (this->hidden->warp_flag)
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#define resize_icon (this->hidden->resize_icon)
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#define current_grab_mode (this->hidden->current_grab_mode)
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#define client_mode_list (this->hidden->client_mode_list)
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#define keymap (this->hidden->keymap)
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#define current_mods (this->hidden->current_mods)
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#define last_virtual_button (this->hidden->last_virtual_button)
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#define power_connection (this->hidden->power_connection)
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#define expect_mouse_up (this->hidden->expect_mouse_up)
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#define grab_state (this->hidden->grab_state)
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#define cursor_loc (this->hidden->cursor_loc)
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#define cursor_should_be_visible (this->hidden->cursor_should_be_visible)
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#define cursor_visible (this->hidden->cursor_visible)
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#define sw_buffers (this->hidden->sw_buffers)
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#define thread (this->hidden->thread)
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#define sem1 (this->hidden->sem1)
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#define sem2 (this->hidden->sem2)
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#define current_buffer (this->hidden->current_buffer)
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#define quit_thread (this->hidden->quit_thread)
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#define system_version (this->hidden->system_version)
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#define opengl_library (this->hidden->opengl_library)
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/* grab states - the input is in one of these states */
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enum {
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    QZ_UNGRABBED = 0,
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    QZ_VISIBLE_GRAB,
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    QZ_INVISIBLE_GRAB
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};
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/* grab actions - these can change the grabbed state */
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enum {
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    QZ_ENABLE_GRAB = 0,
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    QZ_DISABLE_GRAB,
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    QZ_HIDECURSOR,
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    QZ_SHOWCURSOR
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};
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/* Gamma Functions */
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int    QZ_SetGamma          (_THIS, float red, float green, float blue);
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int    QZ_GetGamma          (_THIS, float *red, float *green, float *blue);
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int    QZ_SetGammaRamp      (_THIS, Uint16 *ramp);
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int    QZ_GetGammaRamp      (_THIS, Uint16 *ramp);
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/* OpenGL functions */
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int    QZ_SetupOpenGL       (_THIS, int bpp, Uint32 flags);
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void   QZ_TearDownOpenGL    (_THIS);
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void*  QZ_GL_GetProcAddress (_THIS, const char *proc);
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int    QZ_GL_GetAttribute   (_THIS, SDL_GLattr attrib, int* value);
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int    QZ_GL_MakeCurrent    (_THIS);
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void   QZ_GL_SwapBuffers    (_THIS);
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int    QZ_GL_LoadLibrary    (_THIS, const char *location);
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/* Cursor and Mouse functions */
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void         QZ_FreeWMCursor     (_THIS, WMcursor *cursor);
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WMcursor*    QZ_CreateWMCursor   (_THIS, Uint8 *data, Uint8 *mask,
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                                  int w, int h, int hot_x, int hot_y);
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int          QZ_ShowWMCursor     (_THIS, WMcursor *cursor);
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void         QZ_WarpWMCursor     (_THIS, Uint16 x, Uint16 y);
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void         QZ_MoveWMCursor     (_THIS, int x, int y);
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void         QZ_CheckMouseMode   (_THIS);
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void         QZ_UpdateMouse      (_THIS);
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/* Event functions */
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void         QZ_InitOSKeymap     (_THIS);
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void         QZ_PumpEvents       (_THIS);
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/* Window Manager functions */
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void         QZ_SetCaption       (_THIS, const char *title, const char *icon);
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void         QZ_SetIcon          (_THIS, SDL_Surface *icon, Uint8 *mask);
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int          QZ_IconifyWindow    (_THIS);
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SDL_GrabMode QZ_GrabInput        (_THIS, SDL_GrabMode grab_mode);
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/*int          QZ_GetWMInfo        (_THIS, SDL_SysWMinfo *info);*/
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/* YUV functions */
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SDL_Overlay* QZ_CreateYUVOverlay (_THIS, int width, int height,
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                                         Uint32 format, SDL_Surface *display);
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/* Private functions (used internally) */
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void         QZ_PrivateWarpCursor (_THIS, int x, int y);
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void         QZ_ChangeGrabState (_THIS, int action);
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void         QZ_RegisterForSleepNotifications (_THIS);
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void         QZ_ShowMouse (_THIS);
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void         QZ_HideMouse (_THIS);
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void         QZ_PrivateGlobalToLocal (_THIS, NSPoint *p);
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void         QZ_PrivateCocoaToSDL (_THIS, NSPoint *p);
779
68c8da837fc0 Date: Tue, 6 Jan 2004 21:54:02 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 777
diff changeset
   225
BOOL         QZ_IsMouseInWindow (_THIS);