tkmacdraw.c

linux系统下的音频通信

void 
XFillPolygon(
    Display* display,		/* Display. */
    Drawable d,			/* Draw on this. */
    GC gc,			/* Use this GC. */
    XPoint* points,		/* Array of points. */
    int npoints,		/* Number of points. */
    int shape,			/* Shape to draw. */
    int mode)			/* Drawing mode. */
{
    MacDrawable *macWin = (MacDrawable *) d;
    PolyHandle polygon;
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;
    int i;

    destPort = TkMacGetDrawablePort(d);

    display->request++;
    GetGWorld(&saveWorld, &saveDevice);
    SetGWorld(destPort, NULL);

    TkMacSetUpClippingRgn(d);
    
    TkMacSetUpGraphicsPort(gc);

    PenNormal();
    polygon = OpenPoly();

    MoveTo((short) (macWin->xOff + points[0].x),
	    (short) (macWin->yOff + points[0].y));
    for (i = 1; i < npoints; i++) {
	if (mode == CoordModePrevious) {
	    Line((short) (macWin->xOff + points[i].x),
		    (short) (macWin->yOff + points[i].y));
	} else {
	    LineTo((short) (macWin->xOff + points[i].x),
		    (short) (macWin->yOff + points[i].y));
	}
    }

    ClosePoly();

    FillCPoly(polygon, gPenPat);

    KillPoly(polygon);
    SetGWorld(saveWorld, saveDevice);
}

/*
 *----------------------------------------------------------------------
 *
 * XDrawRectangle --
 *
 *	Draws a rectangle.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Draws a rectangle on the specified drawable.
 *
 *----------------------------------------------------------------------
 */

void 
XDrawRectangle(
    Display* display,		/* Display. */
    Drawable d,			/* Draw on this. */
    GC gc,			/* Use this GC. */
    int x,			/* Upper left corner. */
    int y,
    unsigned int width,		/* Width & height of rect. */
    unsigned int height)
{
    MacDrawable *macWin = (MacDrawable *) d;
    Rect theRect;
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;

    destPort = TkMacGetDrawablePort(d);

    display->request++;
    GetGWorld(&saveWorld, &saveDevice);
    SetGWorld(destPort, NULL);

    TkMacSetUpClippingRgn(d);

    TkMacSetUpGraphicsPort(gc);

    theRect.left = (short) (macWin->xOff + x);
    theRect.top = (short) (macWin->yOff + y);
    theRect.right = (short) (theRect.left + width);
    theRect.bottom = (short) (theRect.top + height);
	
    ShowPen();
    PenPixPat(gPenPat);
    FrameRect(&theRect);

    SetGWorld(saveWorld, saveDevice);
}

/*
 *----------------------------------------------------------------------
 *
 * XDrawArc --
 *
 *	Draw an arc.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Draws an arc on the specified drawable.
 *
 *----------------------------------------------------------------------
 */

void 
XDrawArc(
    Display* display,		/* Display. */
    Drawable d,			/* Draw on this. */
    GC gc,			/* Use this GC. */
    int x,			/* Upper left of */
    int y,			/* bounding rect. */
    unsigned int width,		/* Width & height. */
    unsigned int height,
    int angle1,			/* Staring angle of arc. */
    int angle2)			/* Ending angle of arc. */
{
    MacDrawable *macWin = (MacDrawable *) d;
    Rect theRect;
    short start, extent;
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;

    destPort = TkMacGetDrawablePort(d);

    display->request++;
    GetGWorld(&saveWorld, &saveDevice);
    SetGWorld(destPort, NULL);

    TkMacSetUpClippingRgn(d);

    TkMacSetUpGraphicsPort(gc);

    theRect.left = (short) (macWin->xOff + x);
    theRect.top = (short) (macWin->yOff + y);
    theRect.right = (short) (theRect.left + width);
    theRect.bottom = (short) (theRect.top + height);
    start = (short) (90 - (angle1 / 64));
    extent = (short) (-(angle2 / 64));

    ShowPen();
    PenPixPat(gPenPat);
    FrameArc(&theRect, start, extent);

    SetGWorld(saveWorld, saveDevice);
}

/*
 *----------------------------------------------------------------------
 *
 * XFillArc --
 *
 *	Draw a filled arc.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Draws a filled arc on the specified drawable.
 *
 *----------------------------------------------------------------------
 */

void
XFillArc(
    Display* display,		/* Display. */
    Drawable d,			/* Draw on this. */
    GC gc,			/* Use this GC. */
    int x,			/* Upper left of */
    int y,			/* bounding rect. */
    unsigned int width,		/* Width & height. */
    unsigned int height,
    int angle1,			/* Staring angle of arc. */
    int angle2)			/* Ending angle of arc. */
{
    MacDrawable *macWin = (MacDrawable *) d;
    Rect theRect;
    short start, extent;
    PolyHandle polygon;
    double sin1, cos1, sin2, cos2, angle;
    double boxWidth, boxHeight;
    double vertex[2], center1[2], center2[2];
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;

    destPort = TkMacGetDrawablePort(d);

    display->request++;
    GetGWorld(&saveWorld, &saveDevice);
    SetGWorld(destPort, NULL);

    TkMacSetUpClippingRgn(d);

    TkMacSetUpGraphicsPort(gc);

    theRect.left = (short) (macWin->xOff + x);
    theRect.top = (short) (macWin->yOff + y);
    theRect.right = (short) (theRect.left + width);
    theRect.bottom = (short) (theRect.top + height);
    start = (short) (90 - (angle1 / 64));
    extent = (short) (- (angle2 / 64));

    if (gc->arc_mode == ArcChord) {
    	boxWidth = theRect.right - theRect.left;
    	boxHeight = theRect.bottom - theRect.top;
    	angle = -(angle1/64.0)*PI/180.0;
    	sin1 = sin(angle);
    	cos1 = cos(angle);
    	angle -= (angle2/64.0)*PI/180.0;
    	sin2 = sin(angle);
    	cos2 = cos(angle);
    	vertex[0] = (theRect.left + theRect.right)/2.0;
    	vertex[1] = (theRect.top + theRect.bottom)/2.0;
    	center1[0] = vertex[0] + cos1*boxWidth/2.0;
    	center1[1] = vertex[1] + sin1*boxHeight/2.0;
    	center2[0] = vertex[0] + cos2*boxWidth/2.0;
    	center2[1] = vertex[1] + sin2*boxHeight/2.0;

	polygon = OpenPoly();
	MoveTo((short) ((theRect.left + theRect.right)/2),
		(short) ((theRect.top + theRect.bottom)/2));
	
	LineTo((short) (center1[0] + 0.5), (short) (center1[1] + 0.5));
	LineTo((short) (center2[0] + 0.5), (short) (center2[1] + 0.5));
	ClosePoly();

	ShowPen();
	FillCArc(&theRect, start, extent, gPenPat);
	FillCPoly(polygon, gPenPat);

	KillPoly(polygon);
    } else {
	ShowPen();
	FillCArc(&theRect, start, extent, gPenPat);
    }

    SetGWorld(saveWorld, saveDevice);
}

/*
 *----------------------------------------------------------------------
 *
 * TkScrollWindow --
 *
 *	Scroll a rectangle of the specified window and accumulate
 *	a damage region.
 *
 * Results:
 *	Returns 0 if the scroll genereated no additional damage.
 *	Otherwise, sets the region that needs to be repainted after
 *	scrolling and returns 1.
 *
 * Side effects:
 *	Scrolls the bits in the window.
 *
 *----------------------------------------------------------------------
 */

int
TkScrollWindow(
    Tk_Window tkwin,		/* The window to be scrolled. */
    GC gc,			/* GC for window to be scrolled. */
    int x,			/* Position rectangle to be scrolled. */
    int y,
    int width,
    int height,
    int dx,			/* Distance rectangle should be moved. */
    int dy,
    TkRegion damageRgn)		/* Region to accumulate damage in. */
{
    MacDrawable *destDraw = (MacDrawable *) Tk_WindowId(tkwin);
    RgnHandle rgn = (RgnHandle) damageRgn;
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;
    Rect srcRect, scrollRect;
    
    destPort = TkMacGetDrawablePort(Tk_WindowId(tkwin));

    GetGWorld(&saveWorld, &saveDevice);
    SetGWorld(destPort, NULL);

    TkMacSetUpClippingRgn(Tk_WindowId(tkwin));

    /*
     * Due to the implementation below the behavior may be differnt
     * than X in certain cases that should never occur in Tk.  The 
     * scrollRect is the source rect extended by the offset (the union 
     * of the source rect and the offset rect).  Everything
     * in the extended scrollRect is scrolled.  On X, it's possible
     * to "skip" over an area if the offset makes the source and
     * destination rects disjoint and non-aligned.
     */
       
    SetRect(&srcRect, (short) (destDraw->xOff + x),
	    (short) (destDraw->yOff + y),
	    (short) (destDraw->xOff + x + width),
	    (short) (destDraw->yOff + y + height));
    scrollRect = srcRect;
    if (dx < 0) {
	scrollRect.left += dx;
    } else {
	scrollRect.right += dx;
    }
    if (dy < 0) {
	scrollRect.top += dy;
    } else {
	scrollRect.bottom += dy;
    }

    /*
     * Adjust clip region so that we don't copy any windows
     * that may overlap us.
     */
    RectRgn(rgn, &srcRect);
    DiffRgn(rgn, destPort->visRgn, rgn);
    OffsetRgn(rgn, dx, dy);
    DiffRgn(destPort->clipRgn, rgn, destPort->clipRgn);
    SetEmptyRgn(rgn);
    
    /*
     * When a menu is up, the Mac does not expect drawing to occur and
     * does not clip out the menu. We have to do it ourselves. This
     * is pretty gross.
     */

    if (tkUseMenuCascadeRgn == 1) {
    	Point scratch = {0, 0};
    	MacDrawable *macDraw = (MacDrawable *) Tk_WindowId(tkwin);

	LocalToGlobal(&scratch);
	CopyRgn(tkMenuCascadeRgn, rgn);
	OffsetRgn(rgn, -scratch.h, -scratch.v);
	DiffRgn(destPort->clipRgn, rgn, destPort->clipRgn);
	SetEmptyRgn(rgn);
	macDraw->toplevel->flags |= TK_DRAWN_UNDER_MENU;
    }
	
    ScrollRect(&scrollRect, dx, dy, rgn);
    
    SetGWorld(saveWorld, saveDevice);
    
    /*
     * Fortunantly, the region returned by ScrollRect is symanticlly
     * the same as what we need to return in this function.  If the
     * region is empty we return zero to denote that no damage was
     * created.
     */
    if (EmptyRgn(rgn)) {
	return 0;
    } else {
	return 1;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacSetUpGraphicsPort --
 *
 *	Set up the graphics port from the given GC.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The current port is adjusted.
 *
 *----------------------------------------------------------------------
 */

void
TkMacSetUpGraphicsPort(
    GC gc)		/* GC to apply to current port. */
{
    RGBColor macColor;

    if (gPenPat == NULL) {
	gPenPat = NewPixPat();
    }
    
    if (TkSetMacColor(gc->foreground, &macColor) == true) {
        /* TODO: cache RGBPats for preformace - measure gains...  */
	MakeRGBPat(gPenPat, &macColor);
    }
    
    PenNormal();
    if(gc->function == GXxor) {
	PenMode(patXor);
    }
    if (gc->line_width > 1) {
	PenSize(gc->line_width, gc->line_width);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacSetUpClippingRgn --
 *
 *	Set up the clipping region so that drawing only occurs on the
 *	specified X subwindow.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The clipping region in the current port is changed.
 *
 *----------------------------------------------------------------------
 */

void
TkMacSetUpClippingRgn(
    Drawable drawable)		/* Drawable to update. */
{
    MacDrawable *macDraw = (MacDrawable *) drawable;

    if (macDraw->winPtr != NULL) {
	if (macDraw->flags & TK_CLIP_INVALID) {
	    TkMacUpdateClipRgn(macDraw->winPtr);
	}

	/*
	 * When a menu is up, the Mac does not expect drawing to occur and
	 * does not clip out the menu. We have to do it ourselves. This
	 * is pretty gross.
	 */

	if (macDraw->clipRgn != NULL) {
	    if (tkUseMenuCascadeRgn == 1) {
	    	Point scratch = {0, 0};
	    	GDHandle saveDevice;
	    	GWorldPtr saveWorld;
	    	
	    	GetGWorld(&saveWorld, &saveDevice);
	    	SetGWorld(TkMacGetDrawablePort(drawable), NULL);
	    	LocalToGlobal(&scratch);
	    	SetGWorld(saveWorld, saveDevice);
	    	if (tmpRgn == NULL) {
	    	    tmpRgn = NewRgn();
	    	}
	    	CopyRgn(tkMenuCascadeRgn, tmpRgn);
	    	OffsetRgn(tmpRgn, -scratch.h, -scratch.v);
	    	DiffRgn(macDraw->clipRgn, tmpRgn, tmpRgn);
	    	SetClip(tmpRgn);
	    	macDraw->toplevel->flags |= TK_DRAWN_UNDER_MENU;
	    } else {
	    	SetClip(macDraw->clipRgn);
	    }
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacMakeStippleMap --
 *
 *	Given a drawable and a stipple pattern this function draws the
 *	pattern repeatedly over the drawable.  The drawable can then
 *	be used as a mask for bit-bliting a stipple pattern over an
 *	object.
 *
 * Results:
 *	A BitMap data structure.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

BitMapPtr
TkMacMakeStippleMap(
    Drawable drawable,		/* Window to apply stipple. */
    Drawable stipple)		/* The stipple pattern. */
{
    MacDrawable *destDraw = (MacDrawable *) drawable;
    GWorldPtr destPort;
    BitMapPtr bitmapPtr;
    int width, height, stippleHeight, stippleWidth;
    int i, j;
    char * data;
    Rect bounds;

    destPort = TkMacGetDrawablePort(drawable);
    width = destPort->portRect.right - destPort->portRect.left;
    height = destPort->portRect.bottom - destPort->portRect.top;
    
    bitmapPtr = (BitMap *) ckalloc(sizeof(BitMap));
    data = (char *) ckalloc(height * ((width / 8) + 1));
    bitmapPtr->bounds.top = bitmapPtr->bounds.left = 0;
    bitmapPtr->bounds.right = (short) width;
    bitmapPtr->bounds.bottom = (short) height;
    bitmapPtr->baseAddr = data;
    bitmapPtr->rowBytes = (width / 8) + 1;

    destPort = TkMacGetDrawablePort(stipple);
    stippleWidth = destPort->portRect.right - destPort->portRect.left;
    stippleHeight = destPort->portRect.bottom - destPort->portRect.top;

    for (i = 0; i < height; i += stippleHeight) {
	for (j = 0; j < width; j += stippleWidth) {
	    bounds.left = j;
	    bounds.top = i;
	    bounds.right = j + stippleWidth;
	    bounds.bottom = i + stippleHeight;
	    
	    CopyBits(&((GrafPtr) destPort)->portBits, bitmapPtr, 
		&((GrafPtr) destPort)->portRect, &bounds, srcCopy, NULL);
	}
    }
    return bitmapPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * InvertByte --
 *
 *      This function reverses the bits in the passed in Byte of data.
 *
 * Results:
 *      The incoming byte in reverse bit order.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static unsigned char
InvertByte(
    unsigned char data)		/* Byte of data. */
{
    unsigned char i;
    unsigned char mask = 1, result = 0;
 
    for (i = (1 << 7); i != 0; i /= 2) {
        if (data & mask) {
            result |= i;
        }
        mask = mask << 1;
    }
    return result;
}