tkwin3d.c

linux系统下的音频通信

    }

    /*
     * Compute various other geometry-related stuff.
     */

    if (leftIn) {
	x1 = x+1;
    } else {
	x1 = x+height-1;
    }
    x2 = x+width;
    if (rightIn) {
	x2--;
    } else {
	x2 -= height;
    }
    x1Delta = (leftIn) ? 1 : -1;
    x2Delta = (rightIn) ? -1 : 1;
    halfway = y + height/2;
    if (topBevel && (height & 1)) {
	halfway++;
    }
    bottom = y + height;

    /*
     * Draw one line for each y-coordinate covered by the bevel.
     */

    for ( ; y < bottom; y++) {
	/*
	 * In some weird cases (such as large border widths for skinny
	 * rectangles) x1 can be >= x2.  Don't draw the lines
	 * in these cases.
	 */

	if (x1 < x2) {
	    TkWinFillRect(dc, x1, y, x2-x1, 1,
		(y < halfway) ? topColor : bottomColor);
	}
	x1 += x1Delta;
	x2 += x2Delta;
    }
    TkWinReleaseDrawableDC(drawable, dc, &state);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetShadows --
 *
 *	This procedure computes the shadow colors for a 3-D border
 *	and fills in the corresponding fields of the Border structure.
 *	It's called lazily, so that the colors aren't allocated until
 *	something is actually drawn with them.  That way, if a border
 *	is only used for flat backgrounds the shadow colors will
 *	never be allocated.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The lightGC and darkGC fields in borderPtr get filled in,
 *	if they weren't already.
 *
 *----------------------------------------------------------------------
 */

void
TkpGetShadows(borderPtr, tkwin)
    TkBorder *borderPtr;	/* Information about border. */
    Tk_Window tkwin;		/* Window where border will be used for
				 * drawing. */
{
    XColor lightColor, darkColor;
    int tmp1, tmp2;
    XGCValues gcValues;

    if (borderPtr->lightGC != None) {
	return;
    }

    /*
     * Handle the special case of the default system colors.
     */

    if ((TkWinIndexOfColor(borderPtr->bgColorPtr) == COLOR_3DFACE)
	|| (TkWinIndexOfColor(borderPtr->bgColorPtr) == COLOR_WINDOW)) {
	borderPtr->darkColorPtr = Tk_GetColor(NULL, tkwin,
	    Tk_GetUid("SystemButtonShadow"));
	gcValues.foreground = borderPtr->darkColorPtr->pixel;
	borderPtr->darkGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
	borderPtr->lightColorPtr = Tk_GetColor(NULL, tkwin,
	    Tk_GetUid("SystemButtonHighlight"));
	gcValues.foreground = borderPtr->lightColorPtr->pixel;
	borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
	((WinBorder*)borderPtr)->dark2ColorPtr = Tk_GetColor(NULL, tkwin,
		Tk_GetUid("System3dDarkShadow"));
	((WinBorder*)borderPtr)->light2ColorPtr = Tk_GetColor(NULL, tkwin,
		Tk_GetUid("System3dLight"));
	return;
    } else {
	darkColor.red = 0;
	darkColor.green = 0;
	darkColor.blue = 0;
	((WinBorder*)borderPtr)->dark2ColorPtr = Tk_GetColorByValue(tkwin,
	    &darkColor);
	lightColor = *(borderPtr->bgColorPtr);
	((WinBorder*)borderPtr)->light2ColorPtr = Tk_GetColorByValue(tkwin, 
	    &lightColor);
    }
    
    /*
     * First, handle the case of a color display with lots of colors.
     * The shadow colors get computed using whichever formula results
     * in the greatest change in color:
     * 1. Lighter shadow is half-way to white, darker shadow is half
     *    way to dark.
     * 2. Lighter shadow is 40% brighter than background, darker shadow
     *    is 40% darker than background.
     */

    if (Tk_Depth(tkwin) >= 6) {
	/*
	 * This is a color display with lots of colors.  For the dark
	 * shadow, cut 40% from each of the background color components.
	 * For the light shadow, boost each component by 40% or half-way
	 * to white, whichever is greater (the first approach works
	 * better for unsaturated colors, the second for saturated ones).
	 */

	darkColor.red = (60 * (int) borderPtr->bgColorPtr->red)/100;
	darkColor.green = (60 * (int) borderPtr->bgColorPtr->green)/100;
	darkColor.blue = (60 * (int) borderPtr->bgColorPtr->blue)/100;
	borderPtr->darkColorPtr = Tk_GetColorByValue(tkwin, &darkColor);
	gcValues.foreground = borderPtr->darkColorPtr->pixel;
	borderPtr->darkGC = Tk_GetGC(tkwin, GCForeground, &gcValues);

	/*
	 * Compute the colors using integers, not using lightColor.red
	 * etc.: these are shorts and may have problems with integer
	 * overflow.
	 */

	tmp1 = (14 * (int) borderPtr->bgColorPtr->red)/10;
	if (tmp1 > MAX_INTENSITY) {
	    tmp1 = MAX_INTENSITY;
	}
	tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->red)/2;
	lightColor.red = (tmp1 > tmp2) ? tmp1 : tmp2;
	tmp1 = (14 * (int) borderPtr->bgColorPtr->green)/10;
	if (tmp1 > MAX_INTENSITY) {
	    tmp1 = MAX_INTENSITY;
	}
	tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->green)/2;
	lightColor.green = (tmp1 > tmp2) ? tmp1 : tmp2;
	tmp1 = (14 * (int) borderPtr->bgColorPtr->blue)/10;
	if (tmp1 > MAX_INTENSITY) {
	    tmp1 = MAX_INTENSITY;
	}
	tmp2 = (MAX_INTENSITY + (int) borderPtr->bgColorPtr->blue)/2;
	lightColor.blue = (tmp1 > tmp2) ? tmp1 : tmp2;
	borderPtr->lightColorPtr = Tk_GetColorByValue(tkwin, &lightColor);
	gcValues.foreground = borderPtr->lightColorPtr->pixel;
	borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
	return;
    }

    if (borderPtr->shadow == None) {
	borderPtr->shadow = Tk_GetBitmap((Tcl_Interp *) NULL, tkwin,
		Tk_GetUid("gray50"));
	if (borderPtr->shadow == None) {
	    panic("TkpGetShadows couldn't allocate bitmap for border");
	}
    }
    if (borderPtr->visual->map_entries > 2) {
	/*
	 * This isn't a monochrome display, but the colormap either
	 * ran out of entries or didn't have very many to begin with.
	 * Generate the light shadows with a white stipple and the
	 * dark shadows with a black stipple.
	 */

	gcValues.foreground = borderPtr->bgColorPtr->pixel;
	gcValues.background = BlackPixelOfScreen(borderPtr->screen);
	gcValues.stipple = borderPtr->shadow;
	gcValues.fill_style = FillOpaqueStippled;
	borderPtr->darkGC = Tk_GetGC(tkwin,
		GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
	gcValues.foreground = WhitePixelOfScreen(borderPtr->screen);
	gcValues.background = borderPtr->bgColorPtr->pixel;
	borderPtr->lightGC = Tk_GetGC(tkwin,
		GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
	return;
    }

    /*
     * This is just a measly monochrome display, hardly even worth its
     * existence on this earth.  Make one shadow a 50% stipple and the
     * other the opposite of the background.
     */

    gcValues.foreground = WhitePixelOfScreen(borderPtr->screen);
    gcValues.background = BlackPixelOfScreen(borderPtr->screen);
    gcValues.stipple = borderPtr->shadow;
    gcValues.fill_style = FillOpaqueStippled;
    borderPtr->lightGC = Tk_GetGC(tkwin,
	    GCForeground|GCBackground|GCStipple|GCFillStyle, &gcValues);
    if (borderPtr->bgColorPtr->pixel
	    == WhitePixelOfScreen(borderPtr->screen)) {
	gcValues.foreground = BlackPixelOfScreen(borderPtr->screen);
	borderPtr->darkGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
    } else {
	borderPtr->darkGC = borderPtr->lightGC;
	borderPtr->lightGC = Tk_GetGC(tkwin, GCForeground, &gcValues);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinGetBorderPixels --
 *
 *	This routine returns the 5 COLORREFs used to draw a given
 *	3d border.  
 *
 * Results:
 *	Returns the colors in the specified array.
 *
 * Side effects:
 *	May cause the remaining colors to be allocated.
 *
 *----------------------------------------------------------------------
 */

COLORREF
TkWinGetBorderPixels(tkwin, border, which)
    Tk_Window tkwin;
    Tk_3DBorder border;
    int which;			/* One of TK_3D_FLAT_GC, TK_3D_LIGHT_GC,
				 * TK_3D_DARK_GC, TK_3D_LIGHT2, TK_3D_DARK2 */
{
    WinBorder *borderPtr = (WinBorder *) border;
    
    if (borderPtr->info.lightGC == None) {
	TkpGetShadows(&borderPtr->info, tkwin);
    }
    switch (which) {
	case TK_3D_FLAT_GC:
	    return borderPtr->info.bgColorPtr->pixel;
	case TK_3D_LIGHT_GC:
	    if (borderPtr->info.lightColorPtr == NULL) {
		return WhitePixelOfScreen(borderPtr->info.screen);
	    }
	    return borderPtr->info.lightColorPtr->pixel;
	case TK_3D_DARK_GC:
	    if (borderPtr->info.darkColorPtr == NULL) {
		return BlackPixelOfScreen(borderPtr->info.screen);
	    }
	    return borderPtr->info.darkColorPtr->pixel;
	case TK_3D_LIGHT2:
	    return borderPtr->light2ColorPtr->pixel;
	case TK_3D_DARK2:
	    return borderPtr->dark2ColorPtr->pixel;
    }
    return 0;
}