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- /**********************************************************************\
-
- File: Circle serendipity fade.c
-
- Purpose: Graphic effect to fade main screen to solid pattern.
- See comments below for more description.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program in a file named "GNU General Public License".
- If not, write to the Free Software Foundation, 675 Mass Ave,
- Cambridge, MA 02139, USA.
-
- \**********************************************************************/
-
- #include "timing.h"
-
- #define CorrectTime 2
- #define theWindowHeight (boundsRect.bottom-boundsRect.top)
- #define theWindowWidth (boundsRect.right-boundsRect.left)
-
- pascal short CircleSerendipityFade(Rect boundsRect, Pattern *thePattern);
-
- /* I haven't the slightest idea why this works. Hence the name. -MP */
-
- pascal short CircleSerendipityFade(Rect boundsRect, Pattern *thePattern)
- {
- Rect theRect;
- RgnHandle curregion, boundsRgn, sectrgn;
- Point zeropoint;
- int gap;
-
- gap=theWindowHeight/40;
- SetRect(&theRect, boundsRect.left, boundsRect.top-2*theWindowHeight, boundsRect.right,
- boundsRect.bottom-theWindowHeight);
-
- boundsRgn=NewRgn();
- SetRectRgn(boundsRgn, boundsRect.left, boundsRect.top, boundsRect.right, boundsRect.bottom);
- sectrgn=NewRgn();
- curregion=NewRgn();
- SetEmptyRgn(curregion);
- OpenRgn();
- FrameOval(&theRect);
- CloseRgn(curregion);
- zeropoint.v=boundsRect.bottom;
- zeropoint.h=boundsRect.left;
- do
- {
- StartTiming();
- SectRgn(curregion, boundsRgn, sectrgn);
- FillRgn(sectrgn, *thePattern);
- OffsetRgn(curregion, 0, gap);
- TimeCorrection(CorrectTime);
- }
- while (!(PtInRgn(zeropoint, curregion)));
-
- FillRect(&boundsRect, *thePattern);
-
- DisposeRgn(curregion);
- DisposeRgn(boundsRgn);
- DisposeRgn(sectrgn);
-
- return 0;
- }
-