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Info_Mac IV CD-ROM (Pacific HiTech Inc.)(August 1994).iso
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MSG Demo 1.4.source Folder
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Demo ƒ
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Fades ƒ
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Skipaline U-D fade.c
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1994-04-15
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/**********************************************************************\
File: Skipaline U-D 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 CorrectTime 1
#define theWindowWidth (boundsRect.right-boundsRect.left)
#define theWindowHeight (boundsRect.bottom-boundsRect.top)
pascal short SkipalineFade(Rect boundsRect, Pattern *thePattern);
/* Copy even-numbered rows starting at the top and moving down, and copy odd-
numbered rows starting at the bottom and moving up. */
pascal short SkipalineFade(Rect boundsRect, Pattern *thePattern)
{
Rect thisone,thatone;
SetRect(&thisone, boundsRect.left, boundsRect.top, boundsRect.right, boundsRect.top+1);
SetRect(&thatone, boundsRect.left, boundsRect.bottom-1, boundsRect.right, boundsRect.bottom);
if (theWindowHeight%2)
OffsetRect(&thatone, 0, -1);
while (thisone.top<boundsRect.bottom)
{
StartTiming();
FillRect(&thisone, *thePattern);
FillRect(&thatone, *thePattern);
thisone.top+=2; /* even row goes down by 2 */
thisone.bottom+=2;
thatone.top-=2; /* odd row goes up by 2 */
thatone.bottom-=2;
TimeCorrection(CorrectTime);
}
return 0;
}