mirror of
https://github.com/byteworksinc/ORCA-C.git
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122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
/*****************************************************************
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*
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* Call ProDOS 16
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*
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* This program draws ovals on the 16 color screen. It then
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* dumps the contents of the graphics screen to a file. If the
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* file is loaded and then stored to the graphics screen, the
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* image dumped is displayed.
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*
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* DO NOT EXECUTE THIS PROGRAM FROM THE DESKTOP. It uses non-
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* standard mechanisms for accessing the graphics screen.
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*
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* By Barbara Allred and Mike Westerfield
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*
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* Copyright 1989
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* Byte Works, Inc.
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*
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*******************************************************************/
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#pragma keep "CallP16"
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#pragma debug 1 /* check stack overflows */
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#include <prodos.h>
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#pragma lint -1
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#include <quickdraw.h>
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#include <stdio.h>
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#include <string.h>
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#include <orca.h>
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Rect ovalRect, *ovalPtr = &ovalRect; /* bounds rectangle for ovals */
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/* Data Control Blocks for ProDOS 16 calls */
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FileRec createDCB = { NULL, 0x00E3, 0x06, 0, 0x01, 0, 0 };
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OpenRec openDCB;
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FileIORec writeDCB;
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int main (void)
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{
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#define SCREENWIDTH 320 /* screen width in pixels */
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int x = 40; /* horizontal location in global coords */
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int y = 20; /* vertical location in global coords */
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int color; /* initial pen color */
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char *str; /* work pointer */
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char filename [L_tmpnam+1] = ""; /* name of file receiving screen dump */
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char *fn;
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/* Start Quick Draw II */
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startgraph(SCREENWIDTH);
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SetPenSize(4, 2); /* use fatter pen */
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/* Draw ovals in different colors on the screen. */
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for (color = 0; color < 15; color++) {
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ovalRect.v1 = x; ovalRect.h1 = y;
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ovalRect.v2 = x + 15; ovalRect.h2 = y + 15;
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SetSolidPenPat(color+1);
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MoveTo(y, x);
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PaintOval(ovalPtr);
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SetSolidPenPat(color);
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MoveTo(y, x);
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FrameOval(ovalPtr);
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if (toolerror()) {
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DrawCString("Failure in drawing routine\n");
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goto Fail;
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}
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y += 10; x += 10;
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}
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/* Dump contents of screen to a file. */
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fn = tmpnam(&filename[1]); /* get unique filename for dump */
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if (fn == NULL) {
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MoveTo (100, 50);
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SetSolidPenPat(black);
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DrawCString("Unable to obtain unique filename for screen dump");
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goto Fail;
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}
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filename[0] = strlen(&filename[1]); /* convert C-string to P-string */
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createDCB.pathname = filename; /* create screen dump file */
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CREATE(&createDCB);
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if (toolerror()) {
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MoveTo(50, 100);
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SetSolidPenPat(black);
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DrawCString("Unable to create file for screen dump");
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goto Fail;
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}
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openDCB.openPathname = filename; /* open the screen dump file */
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OPEN(&openDCB);
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if (toolerror()) {
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MoveTo(50, 100);
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SetSolidPenPat(black);
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DrawCString("Unable to open file for screen dump");
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goto Fail;
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}
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writeDCB.fileRefNum = openDCB.openRefNum; /* write screen contents to file */
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writeDCB.dataBuffer = (void *) 0x00E12000;
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writeDCB.requestCount = 32768L;
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WRITE(&writeDCB);
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if (toolerror()) {
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MoveTo(50, 100);
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SetSolidPenPat(black);
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DrawCString("Unable to write screen contents to file");
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goto Fail;
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}
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CLOSE(&openDCB); /* close the screen dump file */
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/* Wrap up: Wait for key press and then shut down QuickDraw II. */
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Fail:
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SetSolidPenPat(black); /* wait for user to signal end */
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str = "Press return when ready to quit program";
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MoveTo(SCREENWIDTH-CStringWidth(str), 40);
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DrawCString(str);
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getchar();
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endgraph();
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printf("The name of the file containing the screen dump is:\n%b", filename);
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}
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