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- /**********************************************************************\
-
- File: Halves scroll reversed.c
-
- Purpose: Graphic effect from offscreen bitmap to main window (on
- screen). 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 3
- #define theWindowHeight (boundsRect.bottom-boundsRect.top)
- #define theWindowWidth (boundsRect.right-boundsRect.left)
-
- pascal short HalvesScrollReversed(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect);
-
- /* 2 regions, split down the middle of the screen. Scroll the screen down in one
- region and up in the other. */
-
- pascal short HalvesScrollReversed(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect)
- {
- int x;
- Rect theTopRect, topdest, theBottomRect, bottomdest;
- Rect topscrollsource, bottomscrollsource;
- int cx;
- int BoxSize;
-
- BoxSize=theWindowHeight/25;
- cx = boundsRect.left + theWindowWidth / 2;
-
- topscrollsource=topdest=bottomscrollsource=bottomdest=boundsRect;
- topscrollsource.left=topdest.left=bottomscrollsource.right=bottomdest.right=cx;
- topdest.bottom=topdest.top+BoxSize;
- bottomdest.top=bottomdest.bottom-BoxSize;
-
- SetRect(&theTopRect, cx, boundsRect.bottom-BoxSize, boundsRect.right, boundsRect.bottom);
- SetRect(&theBottomRect, boundsRect.left, boundsRect.top, cx, boundsRect.top+BoxSize);
-
- for(x = theWindowHeight - BoxSize; x >= 0; x -= BoxSize)
- {
- StartTiming();
- ScrollTheRect(&topscrollsource, 0, BoxSize, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &theTopRect, &topdest, 0, 0L);
- theTopRect.bottom-=BoxSize;
- theTopRect.top-=BoxSize;
-
- ScrollTheRect(&bottomscrollsource, 0, -BoxSize, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &theBottomRect, &bottomdest, 0, 0L);
- theBottomRect.top+=BoxSize;
- theBottomRect.bottom+=BoxSize;
-
- TimeCorrection(CorrectTime);
- }
-
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &boundsRect, &boundsRect, 0, 0L);
-
- return 0;
- }
-