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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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BoxIn fade.c
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1994-04-15
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74 lines
/**********************************************************************\
File: BoxIn 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 theWindowHeight (boundsRect.bottom-boundsRect.top)
#define theWindowWidth (boundsRect.right-boundsRect.left)
#define CorrectTime 3
pascal short BoxInFade(Rect boundsRect, Pattern *thePattern);
/* Basically, there are four bars -- one starts at the top and moves down;
one starts at the bottom and moves up; one starts at the left and moves
right; one starts at the right and moves left. There's a lot of overlap
of bitcopying, but it's masked by the timing correction */
pascal short BoxInFade(Rect boundsRect, Pattern *thePattern)
{
Rect vsource1,vsource2, hsource1, hsource2;
int vbar,hbar;
int HBarGap,VBarGap;
VBarGap=theWindowWidth/50;
HBarGap=theWindowHeight/50;
vbar=boundsRect.left;
hbar=boundsRect.top;
vsource1.top=vsource2.top=boundsRect.top;
vsource1.bottom=vsource2.bottom=boundsRect.bottom;
hsource1.left=hsource2.left=boundsRect.left;
hsource1.right=hsource2.right=boundsRect.right;
while (vbar<boundsRect.left+theWindowWidth/2+VBarGap)
{
StartTiming();
vsource1.left=vbar;
vsource1.right=vsource1.left+VBarGap;
vsource2.right=2*boundsRect.left+theWindowWidth-vbar;
vsource2.left=vsource2.right-VBarGap;
hsource1.top=hbar;
hsource1.bottom=hsource1.top+HBarGap;
hsource2.bottom=2*boundsRect.top+theWindowHeight-hbar;
hsource2.top=hsource2.bottom-HBarGap;
FillRect(&vsource1, *thePattern);
FillRect(&hsource1, *thePattern);
FillRect(&vsource2, *thePattern);
FillRect(&hsource2, *thePattern);
vbar+=VBarGap;
hbar+=HBarGap;
TimeCorrection(CorrectTime);
}
return 0;
}