sdl_quartzvideo.m

网络MPEG4IP流媒体开发源代码

            CGSGetOnScreenWindowList (cgsConnection, 0, kMaxWindows, windows, &count);
            CGSGetScreenRectForWindow (cgsConnection, windowNumber, &contentRect);

            /* adjust rect for window title bar (if present) */
            contentRect.origin.y    += windowContentOffset;
            contentRect.size.height -= windowContentOffset;

            firstDockIcon = -1;
            dockIconCacheMiss = SDL_FALSE;

            /* 
                The first window is always an empty window with level kCGSWindowLevelTop
                so start at index 1
            */
            for (i = 1; i < count; i++) {

                /* If we reach our window in the list, it cannot be obscured */
                if (windows[i] == windowNumber) {

                    obscured = SDL_FALSE;
                    break;
                }
                else {

                    float shadowSide;
                    float shadowTop;
                    float shadowBottom;

                    CGSGetWindowLevel (cgsConnection, windows[i], &winLevel);

                    if (winLevel == kCGSWindowLevelDockIcon) {

                        int j;

                        if (firstDockIcon < 0) {

                            firstDockIcon = i;

                            if (numCachedDockIcons > 0) {

                                for (j = 0; j < numCachedDockIcons; j++) {

                                    if (windows[i] == dockIcons[j])
                                        i++;
                                    else
                                        break;
                                }

                                if (j != 0) {

                                    i--;

                                    if (j < numCachedDockIcons) {

                                        dockIconCacheMiss = SDL_TRUE;
                                    }
                                }

                            }
                        }

                        continue;
                    }
                    else if (winLevel == kCGSWindowLevelMenuIgnore
                             /* winLevel == kCGSWindowLevelTop */) {

                        continue; /* cannot obscure window */
                    }
                    else if (winLevel == kCGSWindowLevelDockMenu ||
                             winLevel == kCGSWindowLevelMenu) {

                        shadowSide = 18;
                        shadowTop = 4;
                        shadowBottom = 22;
                    }
                    else if (winLevel == kCGSWindowLevelUtility) {

                        shadowSide = 8;
                        shadowTop = 4;
                        shadowBottom = 12;
                    }
                    else if (winLevel == kCGSWindowLevelNormal) {

                        /* 
                            These numbers are for foreground windows,
                            they are too big (but will work) for background windows 
                        */
                        shadowSide = 20;
                        shadowTop = 10;
                        shadowBottom = 24;
                    }
                    else if (winLevel == kCGSWindowLevelDock) {

                        /* Create dock icon cache */
                        if (numCachedDockIcons != (i-firstDockIcon) ||
                            dockIconCacheMiss) {

                            numCachedDockIcons = i - firstDockIcon;
                            memcpy (dockIcons, &(windows[firstDockIcon]),
                                    numCachedDockIcons * sizeof(*windows));
                        }

                        /* no shadow */
                        shadowSide = 0;
                        shadowTop = 0;
                        shadowBottom = 0;
                    }
                    else {

                        /*
                            kCGSWindowLevelDockLabel,
                            kCGSWindowLevelDock,
                            kOther???
                        */

                        /* no shadow */
                        shadowSide = 0;
                        shadowTop = 0;
                        shadowBottom = 0;
                    }

                    CGSGetScreenRectForWindow (cgsConnection, windows[i], &winRect);

                    winRect.origin.x -= shadowSide;
                    winRect.origin.y -= shadowTop;
                    winRect.size.width += shadowSide;
                    winRect.size.height += shadowBottom;

                    if (NSIntersectsRect (contentRect, winRect)) {

                        obscured = SDL_TRUE;
                        break;
                    }

                } /* window was not our window */

            } /* iterate over windows */

        } /* get cgsConnection */

    } /* window is visible */
    
    return obscured;
#else
    return SDL_TRUE;
#endif
}


/* Locking functions for the software window buffer */
static int QZ_LockWindow (_THIS, SDL_Surface *surface) {
    
    return LockPortBits ( [ window_view qdPort ] );
}

static void QZ_UnlockWindow (_THIS, SDL_Surface *surface) {

    UnlockPortBits ( [ window_view qdPort ] );
}

static void QZ_UpdateRects (_THIS, int numRects, SDL_Rect *rects) {

    if (SDL_VideoSurface->flags & SDL_OPENGLBLIT) {
        QZ_GL_SwapBuffers (this);
    }
    else if ( [ qz_window isMiniaturized ] ) {
    
        /* Do nothing if miniaturized */
    }
    
    else if ( ! QZ_IsWindowObscured (qz_window) ) {

        /* Use direct copy to flush contents to the display */
        CGrafPtr savePort;
        CGrafPtr dstPort, srcPort;
        const BitMap  *dstBits, *srcBits;
        Rect     dstRect, srcRect;
        Point    offset;
        int i;

        GetPort (&savePort);

        dstPort = CreateNewPortForCGDisplayID ((UInt32)display_id);
        srcPort = [ window_view qdPort ];

        offset.h = 0;
        offset.v = 0;
        SetPort (srcPort);
        LocalToGlobal (&offset);

        SetPort (dstPort);

        LockPortBits (dstPort);
        LockPortBits (srcPort);

        dstBits = GetPortBitMapForCopyBits (dstPort);
        srcBits = GetPortBitMapForCopyBits (srcPort);

        for (i = 0; i < numRects; i++) {

            SetRect (&srcRect, rects[i].x, rects[i].y,
                     rects[i].x + rects[i].w,
                     rects[i].y + rects[i].h);

            SetRect (&dstRect,
                     rects[i].x + offset.h,
                     rects[i].y + offset.v,
                     rects[i].x + rects[i].w + offset.h,
                     rects[i].y + rects[i].h + offset.v);

            CopyBits (srcBits, dstBits,
                      &srcRect, &dstRect, srcCopy, NULL);

        }

        SetPort (savePort);
    }
    else {
        /* Use QDFlushPortBuffer() to flush content to display */
        int i;
        RgnHandle dirty = NewRgn ();
        RgnHandle temp  = NewRgn ();

        SetEmptyRgn (dirty);

        /* Build the region of dirty rectangles */
        for (i = 0; i < numRects; i++) {

            MacSetRectRgn (temp, rects[i].x, rects[i].y,
                        rects[i].x + rects[i].w, rects[i].y + rects[i].h);
            MacUnionRgn (dirty, temp, dirty);
        }

        QZ_DrawResizeIcon (this, dirty);
        
        /* Flush the dirty region */
        QDFlushPortBuffer ( [ window_view qdPort ], dirty );
        DisposeRgn (dirty);
        DisposeRgn (temp);
    }
}

static void QZ_VideoQuit (_THIS) {

    QZ_UnsetVideoMode (this);
    CGPaletteRelease (palette);
}

static int  QZ_FillHWRect (_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) {

    CGSDisplayHWFill (display_id, rect->x, rect->y, rect->w, rect->h, color);

    return 0;
}

static int  QZ_LockHWSurface(_THIS, SDL_Surface *surface) {

    return 1;
}

static void QZ_UnlockHWSurface(_THIS, SDL_Surface *surface) {

}

static void QZ_FreeHWSurface (_THIS, SDL_Surface *surface) {
}

/*
 int QZ_FlipHWSurface (_THIS, SDL_Surface *surface) {
     return 0;
 }
 */

/* Gamma functions */
static int QZ_SetGamma (_THIS, float red, float green, float blue) {

    const CGGammaValue min = 0.0, max = 1.0;

    if (red == 0.0)
        red = FLT_MAX;
    else
        red = 1.0 / red;

    if (green == 0.0)
        green = FLT_MAX;
    else
        green = 1.0 / green;

    if (blue == 0.0)
        blue = FLT_MAX;
    else
        blue  = 1.0 / blue;

    if ( CGDisplayNoErr == CGSetDisplayTransferByFormula
         (display_id, min, max, red, min, max, green, min, max, blue) ) {

        return 0;
    }
    else {

        return -1;
    }
}

static int QZ_GetGamma (_THIS, float *red, float *green, float *blue) {

    CGGammaValue dummy;
    if ( CGDisplayNoErr == CGGetDisplayTransferByFormula
         (display_id, &dummy, &dummy, red,
          &dummy, &dummy, green, &dummy, &dummy, blue) )

        return 0;
    else
        return -1;
}

static int QZ_SetGammaRamp (_THIS, Uint16 *ramp) {

    const CGTableCount tableSize = 255;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];

    int i;

    /* Extract gamma values into separate tables, convert to floats between 0.0 and 1.0 */
    for (i = 0; i < 256; i++)
        redTable[i % 256] = ramp[i] / 65535.0;

    for (i=256; i < 512; i++)
        greenTable[i % 256] = ramp[i] / 65535.0;

    for (i=512; i < 768; i++)
        blueTable[i % 256] = ramp[i] / 65535.0;

    if ( CGDisplayNoErr == CGSetDisplayTransferByTable
         (display_id, tableSize, redTable, greenTable, blueTable) )
        return 0;
    else
        return -1;
}

static int QZ_GetGammaRamp (_THIS, Uint16 *ramp) {

    const CGTableCount tableSize = 255;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];
    CGTableCount actual;
    int i;

    if ( CGDisplayNoErr != CGGetDisplayTransferByTable
         (display_id, tableSize, redTable, greenTable, blueTable, &actual) ||
         actual != tableSize)

        return -1;

    /* Pack tables into one array, with values from 0 to 65535 */
    for (i = 0; i < 256; i++)
        ramp[i] = redTable[i % 256] * 65535.0;

    for (i=256; i < 512; i++)
        ramp[i] = greenTable[i % 256] * 65535.0;

    for (i=512; i < 768; i++)
        ramp[i] = blueTable[i % 256] * 65535.0;

    return 0;
}

/* OpenGL helper functions (used internally) */

static int QZ_SetupOpenGL (_THIS, int bpp, Uint32 flags) {

    NSOpenGLPixelFormatAttribute attr[32];
    NSOpenGLPixelFormat *fmt;
    int i = 0;
    int colorBits = bpp;

    if ( flags & SDL_FULLSCREEN ) {

        attr[i++] = NSOpenGLPFAFullScreen;
    }
    /* In windowed mode, the OpenGL pixel depth must match device pixel depth */
    else if ( colorBits != device_bpp ) {

        colorBits = device_bpp;
    }

    attr[i++] = NSOpenGLPFAColorSize;
    attr[i++] = colorBits;

    attr[i++] = NSOpenGLPFADepthSize;
    attr[i++] = this->gl_config.depth_size;

    if ( this->gl_config.double_buffer ) {
        attr[i++] = NSOpenGLPFADoubleBuffer;
    }

    if ( this->gl_config.stereo ) {
        attr[i++] = NSOpenGLPFAStereo;
    }

    if ( this->gl_config.stencil_size != 0 ) {
        attr[i++] = NSOpenGLPFAStencilSize;
        attr[i++] = this->gl_config.stencil_size;
    }