home *** CD-ROM | disk | FTP | other *** search
- /**********************************************************************\
-
- File: Corner circle fade.c
-
- Purpose: Graphic effect to fade main window 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 gap 8 /* difference between one radius and the next */
- #define CorrectTime 2
-
- pascal short CornerCircleFade(Rect boundsRect, Pattern *thePattern);
-
- /* Make progressively larger circle regions, centered at the top-left corner
- of the screen. Quickdraw takes care of all the excess space off the screen
- that you include in the region. */
-
- pascal short CornerCircleFade(Rect boundsRect, Pattern *thePattern)
- {
- Rect theRect;
- int cx, cy;
- RgnHandle curregion, boundsRgn, sectrgn;
- Point zeropoint;
-
- zeropoint.v=boundsRect.bottom;
- zeropoint.h=boundsRect.right;
-
- SetRect(&theRect, boundsRect.left-gap, boundsRect.top-gap, boundsRect.left+gap,
- boundsRect.top+gap);
- boundsRgn=NewRgn();
- RectRgn(boundsRgn, &boundsRect);
- sectrgn=NewRgn();
- curregion=NewRgn();
- do
- {
- StartTiming();
- SetEmptyRgn(curregion);
- OpenRgn();
- FrameOval(&theRect);
- CloseRgn(curregion);
- SectRgn(curregion, boundsRgn, sectrgn);
- FillRgn(sectrgn, *thePattern);
- theRect.left-=gap;
- theRect.right+=gap;
- theRect.top-=gap;
- theRect.bottom+=gap;
- TimeCorrection(CorrectTime);
- }
- while (!(PtInRgn(zeropoint,curregion)));
-
- DisposeRgn(curregion);
- DisposeRgn(boundsRgn);
- DisposeRgn(sectrgn);
-
- return 0;
- }
-