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- /**********************************************************************\
-
- File: Split scroll U-D.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 4
- #define theWindowWidth (boundsRect.right-boundsRect.left)
- #define theWindowHeight (boundsRect.bottom-boundsRect.top)
-
- pascal short SplitScrollUD(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect);
-
- /* Draw a line from the topleft to the bottomright of the screen and split the
- screen into two regions. The top region scrolls down and the bottom region
- scrolls up. */
-
- pascal short SplitScrollUD(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect)
- {
- int x;
- Rect theTopRect, topdest, theBottomRect, bottomdest;
- Rect topscrollsource, topscrolldest, bottomscrollsource, bottomscrolldest;
- RgnHandle toprgn,bottomrgn;
- int BoxSize;
-
- BoxSize=theWindowHeight/25;
- toprgn=NewRgn();
- SetEmptyRgn(toprgn);
- MoveTo(0,0);
- OpenRgn();
- Line(theWindowWidth,0);
- Line(0,theWindowHeight);
- LineTo(0,0);
- CloseRgn(toprgn);
- OffsetRgn(toprgn, boundsRect.left, boundsRect.top);
-
- bottomrgn=NewRgn();
- SetEmptyRgn(bottomrgn);
- MoveTo(0,0);
- OpenRgn();
- Line(0,theWindowHeight);
- Line(theWindowWidth,0);
- LineTo(0,0);
- CloseRgn(bottomrgn);
- OffsetRgn(bottomrgn, boundsRect.left, boundsRect.top);
-
- topscrollsource=boundsRect;
- topscrollsource.bottom-=BoxSize;
- topscrolldest = topscrollsource;
- OffsetRect(&topscrolldest, 0, BoxSize);
- topdest = boundsRect;
- topdest.bottom=topdest.top+BoxSize;
- SetRect(&theTopRect, boundsRect.left, boundsRect.bottom-BoxSize, boundsRect.right, boundsRect.bottom);
-
- bottomscrollsource=boundsRect;
- bottomscrollsource.top+=BoxSize;
- bottomscrolldest=bottomscrollsource;
- OffsetRect(&bottomscrolldest, 0, -BoxSize);
- bottomdest=boundsRect;
- bottomdest.top=bottomdest.bottom-BoxSize;
- SetRect(&theBottomRect, boundsRect.left, boundsRect.top, boundsRect.right, boundsRect.top+BoxSize);
-
- for(x = theWindowHeight - BoxSize; x >= 0; x -= BoxSize)
- {
- StartTiming();
- CopyBits(&(destGrafPtr->portBits), &(destGrafPtr->portBits),
- &topscrollsource, &topscrolldest, 0, toprgn);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &theTopRect, &topdest, 0, toprgn);
- theTopRect.bottom-=BoxSize;
- theTopRect.top-=BoxSize;
-
- CopyBits(&(destGrafPtr->portBits), &(destGrafPtr->portBits),
- &bottomscrollsource, &bottomscrolldest, 0, bottomrgn);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &theBottomRect, &bottomdest, 0, bottomrgn);
- theBottomRect.top+=BoxSize;
- theBottomRect.bottom+=BoxSize;
-
- TimeCorrection(CorrectTime);
- }
-
- return 0;
- }
-