view src/video/quartz/SDL_QuartzWM.m @ 1554:0ca607a5d173

Fixed bug #84 Date: Sun, 23 Oct 2005 16:39:03 +0200 From: "A. Schmid" <sahib@phreaker.net> Subject: [SDL] no software surfaces with svgalib driver? Hi, I noticed that the SDL (1.2.9) svgalib driver only makes use of linear addressable (framebuffer) video modes. On older systems (like one of mine), linear addressable modes are often not available. Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is unusable, since VESA only supports framebuffering for VBE 2.0 and later. The changes necessary to add support for software surfaces seem to be relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see attached patch). The code worked fine for me, but it is no more than a proof of concept and should be reviewed (probably has a memory leak when switching modes). It also uses the vgagl library (included in the svgalib package) and needs to be linked against it. -Alex
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 12:04:40 +0000
parents 376665398b25
children ef4a796e7f24
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2003  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
*/
#include "SDL_config.h"

#include "SDL_QuartzVideo.h"


struct WMcursor {
    Cursor curs;
};

void QZ_FreeWMCursor     (_THIS, WMcursor *cursor) { 

    if ( cursor != NULL )
        free (cursor);
}

/* Use the Carbon cursor routines for now */
WMcursor*    QZ_CreateWMCursor   (_THIS, Uint8 *data, Uint8 *mask, 
                                         int w, int h, int hot_x, int hot_y) { 
    WMcursor *cursor;
    int row, bytes;
        
    /* Allocate the cursor memory */
    cursor = (WMcursor *)malloc(sizeof(WMcursor));
    if ( cursor == NULL ) {
        SDL_OutOfMemory();
        return(NULL);
    }
    memset(cursor, 0, sizeof(*cursor));
    
    if (w > 16)
        w = 16;
    
    if (h > 16)
        h = 16;
    
    bytes = (w+7)/8;

    for ( row=0; row<h; ++row ) {
        memcpy(&cursor->curs.data[row], data, bytes);
        data += bytes;
    }
    for ( row=0; row<h; ++row ) {
        memcpy(&cursor->curs.mask[row], mask, bytes);
        mask += bytes;
    }
    cursor->curs.hotSpot.h = hot_x;
    cursor->curs.hotSpot.v = hot_y;
    
    return(cursor);
}

void QZ_ShowMouse (_THIS) {
    if (!cursor_visible) {
        [ NSCursor unhide ];
        cursor_visible = YES;
    }
}

void QZ_HideMouse (_THIS) {
    BOOL isInGameWin = QZ_IsMouseInWindow (this);
    if (isInGameWin && cursor_visible) {
        [ NSCursor hide ];
        cursor_visible = NO;
    }
}

BOOL QZ_IsMouseInWindow (_THIS) {
    if (mode_flags & SDL_FULLSCREEN) return YES;
    else {
        NSPoint p = [ qz_window mouseLocationOutsideOfEventStream ];
        p.y -= 1.0f; /* Apparently y goes from 1 to h, not from 0 to h-1 (i.e. the "location of the mouse" seems to be defined as "the location of the top left corner of the mouse pointer's hot pixel" */
        return NSPointInRect(p, [ window_view frame ]);
    }
}

int QZ_ShowWMCursor (_THIS, WMcursor *cursor) { 

    if ( cursor == NULL) {
        if ( cursor_should_be_visible ) {
            QZ_HideMouse (this);
            cursor_should_be_visible = NO;
            QZ_ChangeGrabState (this, QZ_HIDECURSOR);
        }
    }
    else {
        SetCursor(&cursor->curs);
        if ( ! cursor_should_be_visible ) {
            QZ_ShowMouse (this);
            cursor_should_be_visible = YES;
            QZ_ChangeGrabState (this, QZ_SHOWCURSOR);
        }
    }

    return 1;
}

/*
    Coordinate conversion functions, for convenience
    Cocoa sets the origin at the lower left corner of the window/screen
    SDL, CoreGraphics/WindowServer, and QuickDraw use the origin at the upper left corner
    The routines were written so they could be called before SetVideoMode() has finished;
    this might have limited usefulness at the moment, but the extra cost is trivial.
*/

/* Convert Cocoa screen coordinate to Cocoa window coordinate */
void QZ_PrivateGlobalToLocal (_THIS, NSPoint *p) {

    *p = [ qz_window convertScreenToBase:*p ];
}


/* Convert Cocoa window coordinate to Cocoa screen coordinate */
void QZ_PrivateLocalToGlobal (_THIS, NSPoint *p) {

    *p = [ qz_window convertBaseToScreen:*p ];
}

/* Convert SDL coordinate to Cocoa coordinate */
void QZ_PrivateSDLToCocoa (_THIS, NSPoint *p) {

    if ( CGDisplayIsCaptured (display_id) ) { /* capture signals fullscreen */
    
        p->y = CGDisplayPixelsHigh (display_id) - p->y;
    }
    else {
       
        *p = [ window_view convertPoint:*p toView: nil ];
        
        /* We need a workaround in OpenGL mode */
        if ( SDL_VideoSurface->flags & SDL_OPENGL ) {
            p->y = [window_view frame].size.height - p->y;
        }
    }
}

/* Convert Cocoa coordinate to SDL coordinate */
void QZ_PrivateCocoaToSDL (_THIS, NSPoint *p) {

    if ( CGDisplayIsCaptured (display_id) ) { /* capture signals fullscreen */
    
        p->y = CGDisplayPixelsHigh (display_id) - p->y;
    }
    else {

        *p = [ window_view convertPoint:*p fromView: nil ];
        
        /* We need a workaround in OpenGL mode */
        if ( SDL_VideoSurface->flags & SDL_OPENGL ) {
            p->y = [window_view frame].size.height - p->y;
        }
    }
}

/* Convert SDL coordinate to window server (CoreGraphics) coordinate */
CGPoint QZ_PrivateSDLToCG (_THIS, NSPoint *p) {
    
    CGPoint cgp;
    
    if ( ! CGDisplayIsCaptured (display_id) ) { /* not captured => not fullscreen => local coord */
    
        int height;
        
        QZ_PrivateSDLToCocoa (this, p);
        QZ_PrivateLocalToGlobal (this, p);
        
        height = CGDisplayPixelsHigh (display_id);
        p->y = height - p->y;
    }
    
    cgp.x = p->x;
    cgp.y = p->y;
    
    return cgp;
}

#if 0 /* Dead code */
/* Convert window server (CoreGraphics) coordinate to SDL coordinate */
void QZ_PrivateCGToSDL (_THIS, NSPoint *p) {
            
    if ( ! CGDisplayIsCaptured (display_id) ) { /* not captured => not fullscreen => local coord */
    
        int height;

        /* Convert CG Global to Cocoa Global */
        height = CGDisplayPixelsHigh (display_id);
        p->y = height - p->y;

        QZ_PrivateGlobalToLocal (this, p);
        QZ_PrivateCocoaToSDL (this, p);
    }
}
#endif /* Dead code */

void  QZ_PrivateWarpCursor (_THIS, int x, int y) {
    
    NSPoint p;
    CGPoint cgp;
    
    p = NSMakePoint (x, y);
    cgp = QZ_PrivateSDLToCG (this, &p);
    
    /* this is the magic call that fixes cursor "freezing" after warp */
    CGSetLocalEventsSuppressionInterval (0.0);
    CGWarpMouseCursorPosition (cgp);
}

void QZ_WarpWMCursor (_THIS, Uint16 x, Uint16 y) {

    /* Only allow warping when in foreground */
    if ( ! [ NSApp isActive ] )
        return;
            
    /* Do the actual warp */
    if (grab_state != QZ_INVISIBLE_GRAB) QZ_PrivateWarpCursor (this, x, y);

    /* Generate the mouse moved event */
    SDL_PrivateMouseMotion (0, 0, x, y);
}

void QZ_MoveWMCursor     (_THIS, int x, int y) { }
void QZ_CheckMouseMode   (_THIS) { }

void QZ_SetCaption    (_THIS, const char *title, const char *icon) {

    if ( qz_window != nil ) {
        NSString *string;
        if ( title != NULL ) {
            string = [ [ NSString alloc ] initWithUTF8String:title ];
            [ qz_window setTitle:string ];
            [ string release ];
        }
        if ( icon != NULL ) {
            string = [ [ NSString alloc ] initWithUTF8String:icon ];
            [ qz_window setMiniwindowTitle:string ];
            [ string release ];
        }
    }
}

void QZ_SetIcon       (_THIS, SDL_Surface *icon, Uint8 *mask)
{
    NSBitmapImageRep *imgrep;
    NSImage *img;
    SDL_Surface *mergedSurface;
    int i,j;
    NSAutoreleasePool *pool;
    SDL_Rect rrect;
    NSSize imgSize = {icon->w, icon->h};
    
    pool = [ [ NSAutoreleasePool alloc ] init ];
    SDL_GetClipRect(icon, &rrect);
    
    /* create a big endian RGBA surface */
    mergedSurface = SDL_CreateRGBSurface(SDL_SWSURFACE|SDL_SRCALPHA, 
                    icon->w, icon->h, 32, 0xff<<24, 0xff<<16, 0xff<<8, 0xff<<0);
    if (mergedSurface==NULL) {
        NSLog(@"Error creating surface for merge");
        goto freePool;
    }
    
    if (mergedSurface->pitch != 
        mergedSurface->format->BytesPerPixel * mergedSurface->w) {
        SDL_SetError ("merged surface has wrong format");
        SDL_FreeSurface (mergedSurface);
        goto freePool;
    }
    
    if (SDL_BlitSurface(icon,&rrect,mergedSurface,&rrect)) {
        NSLog(@"Error blitting to mergedSurface");
        goto freePool;
    }
    
    if (mask) {

        Uint32 *pixels = mergedSurface->pixels;
        for (i = 0; i < mergedSurface->h; i++) {
            for (j = 0; j < mergedSurface->w; j++) {
                
                int index = i * mergedSurface->w + j;
                int mindex = index >> 3;
                int bindex = 7 - (index & 0x7);
                
                if (mask[mindex] & (1 << bindex))
                    pixels[index] |= 0x000000FF;
                else
                    pixels[index] &= 0xFFFFFF00;
            }
        }
    }
    
    imgrep = [ [ NSBitmapImageRep alloc] 
                    initWithBitmapDataPlanes:(unsigned char **)&mergedSurface->pixels 
                        pixelsWide:icon->w pixelsHigh:icon->h bitsPerSample:8 samplesPerPixel:4 
                        hasAlpha:YES isPlanar:NO colorSpaceName:NSDeviceRGBColorSpace 
                        bytesPerRow:icon->w<<2 bitsPerPixel:32 ];
    
    img = [ [ NSImage alloc ] initWithSize:imgSize ];
    
    [ img addRepresentation: imgrep ];
    [ NSApp setApplicationIconImage:img ];
    
    [ img release ];
    [ imgrep release ];
    SDL_FreeSurface(mergedSurface);
freePool:
    [pool release];
}

int  QZ_IconifyWindow (_THIS) { 

    if ( ! [ qz_window isMiniaturized ] ) {
        [ qz_window miniaturize:nil ];
        return 1;
    }
    else {
        SDL_SetError ("window already iconified");
        return 0;
    }
}

/*
int  QZ_GetWMInfo  (_THIS, SDL_SysWMinfo *info) { 
    info->nsWindowPtr = qz_window;
    return 0; 
}*/

void QZ_ChangeGrabState (_THIS, int action) {

    /* 
        Figure out what the next state should be based on the action.
        Ignore actions that can't change the current state.
    */
    if ( grab_state == QZ_UNGRABBED ) {
        if ( action == QZ_ENABLE_GRAB ) {
            if ( cursor_should_be_visible )
                grab_state = QZ_VISIBLE_GRAB;
            else
                grab_state = QZ_INVISIBLE_GRAB;
        }
    }
    else if ( grab_state == QZ_VISIBLE_GRAB ) {
        if ( action == QZ_DISABLE_GRAB )
            grab_state = QZ_UNGRABBED;
        else if ( action == QZ_HIDECURSOR )
            grab_state = QZ_INVISIBLE_GRAB;
    }
    else {
        assert( grab_state == QZ_INVISIBLE_GRAB );
        
        if ( action == QZ_DISABLE_GRAB )
            grab_state = QZ_UNGRABBED;
        else if ( action == QZ_SHOWCURSOR )
            grab_state = QZ_VISIBLE_GRAB;
    }
    
    /* now apply the new state */
    if (grab_state == QZ_UNGRABBED) {
    
        CGAssociateMouseAndMouseCursorPosition (1);
    }
    else if (grab_state == QZ_VISIBLE_GRAB) {
    
        CGAssociateMouseAndMouseCursorPosition (1);
    }
    else {
        assert( grab_state == QZ_INVISIBLE_GRAB );

        QZ_PrivateWarpCursor (this, SDL_VideoSurface->w / 2, SDL_VideoSurface->h / 2);
        CGAssociateMouseAndMouseCursorPosition (0);
    }
}

SDL_GrabMode QZ_GrabInput (_THIS, SDL_GrabMode grab_mode) {

    int doGrab = grab_mode & SDL_GRAB_ON;
    /*int fullscreen = grab_mode & SDL_GRAB_FULLSCREEN;*/

    if ( this->screen == NULL ) {
        SDL_SetError ("QZ_GrabInput: screen is NULL");
        return SDL_GRAB_OFF;
    }
        
    if ( ! video_set ) {
        /*SDL_SetError ("QZ_GrabInput: video is not set, grab will take effect on mode switch"); */
        current_grab_mode = grab_mode;
        return grab_mode;       /* Will be set later on mode switch */
    }

    if ( grab_mode != SDL_GRAB_QUERY ) {
        if ( doGrab )
            QZ_ChangeGrabState (this, QZ_ENABLE_GRAB);
        else
            QZ_ChangeGrabState (this, QZ_DISABLE_GRAB);
        
        current_grab_mode = doGrab ? SDL_GRAB_ON : SDL_GRAB_OFF;
    }

    return current_grab_mode;
}