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- /**********************************************************************\
-
- File: Quadrant 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)
- #define NUM_ITERATIONS 25
-
- pascal short QuadrantScrollReversed(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect);
-
- /* 4 regions, splitting the screen into 4 quadrants. Scroll the screen left in
- the top-left quadrant, up in the top-right, right in the bottom-right,
- down in the bottom-left. */
-
- pascal short QuadrantScrollReversed(GrafPtr sourceGrafPtr, GrafPtr destGrafPtr, Rect boundsRect)
- {
- int x;
- Rect tlsource, trsource, blsource, brsource;
- Rect tldest, trdest, bldest, brdest;
- Rect tlscroll, trscroll, blscroll, brscroll;
- int cx,cy;
- int BoxSize, HBoxSize;
-
- BoxSize=theWindowHeight/(NUM_ITERATIONS*2);
- HBoxSize=theWindowWidth/(NUM_ITERATIONS*2);
-
- cx = boundsRect.left + theWindowWidth / 2;
- cy = boundsRect.top + theWindowHeight / 2;
-
- tlscroll=trscroll=blscroll=brscroll=tldest=trdest=bldest=brdest=boundsRect;
- tlscroll.right=trscroll.left=blscroll.right=brscroll.left=
- tldest.right=trdest.left=bldest.right=brdest.left=cx;
- tlscroll.bottom=trscroll.bottom=blscroll.top=brscroll.top=
- tldest.bottom=trdest.bottom=bldest.top=brdest.top=cy;
- brdest.right=brdest.left+HBoxSize;
- bldest.bottom=bldest.top+BoxSize;
- tldest.left=tldest.right-HBoxSize;
- trdest.top=trdest.bottom-BoxSize;
-
- SetRect(&tlsource, boundsRect.left, boundsRect.top, boundsRect.left+HBoxSize, cy);
- SetRect(&trsource, cx, boundsRect.top, boundsRect.right, boundsRect.top+BoxSize);
- SetRect(&brsource, boundsRect.right-HBoxSize, cy, boundsRect.right, boundsRect.bottom);
- SetRect(&blsource, boundsRect.left, boundsRect.bottom-BoxSize, cx, boundsRect.bottom);
-
- for (x=0; x<NUM_ITERATIONS; x++)
- {
- StartTiming();
- ScrollTheRect(&brscroll, HBoxSize, 0, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &brsource, &brdest, 0, 0L);
- brsource.left-=HBoxSize;
- brsource.right-=HBoxSize;
-
- ScrollTheRect(&blscroll, 0, BoxSize, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &blsource, &bldest, 0, 0L);
- blsource.top-=BoxSize;
- blsource.bottom-=BoxSize;
-
- ScrollTheRect(&tlscroll, -HBoxSize, 0, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &tlsource, &tldest, 0, 0L);
- tlsource.left+=HBoxSize;
- tlsource.right+=HBoxSize;
-
- ScrollTheRect(&trscroll, 0, -BoxSize, 0L);
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &trsource, &trdest, 0, 0L);
- trsource.top+=BoxSize;
- trsource.bottom+=BoxSize;
-
- TimeCorrection(CorrectTime);
- }
-
- CopyBits(&(sourceGrafPtr->portBits), &(destGrafPtr->portBits),
- &boundsRect, &boundsRect, 0, 0L);
-
- return 0;
- }
-