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comparison os2/dw.c @ 1261:61d0c5f84644

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Initial attempt at adding dw_draw_arc() support on all platforms. This code doesn't yet work... will probably require a bunch of fixes... but I wanted to get the code committed while doing research on it.
author bsmith@81767d24-ef19-dc11-ae90-00e081727c95
date Tue, 25 Oct 2011 10:51:59 +0000
parents 3cbd8de0b50b
children 4b0aa8429592
comparison
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1260:3cbd8de0b50b 1261:61d0c5f84644
26 #include <stddef.h> 26 #include <stddef.h>
27 #include <ctype.h> 27 #include <ctype.h>
28 #include <process.h> 28 #include <process.h>
29 #include <time.h> 29 #include <time.h>
30 #include <io.h> 30 #include <io.h>
31 #include <math.h>
31 #ifndef __EMX__ 32 #ifndef __EMX__
32 #include <direct.h> 33 #include <direct.h>
33 #endif 34 #endif
34 #include <sys/time.h> 35 #include <sys/time.h>
35 #include "dw.h" 36 #include "dw.h"
8657 8658
8658 if(!pixmap) 8659 if(!pixmap)
8659 WinReleasePS(hps); 8660 WinReleasePS(hps);
8660 } 8661 }
8661 8662
8663 /* Draw an arc on a window (preferably a render window).
8664 * Parameters:
8665 * handle: Handle to the window.
8666 * pixmap: Handle to the pixmap. (choose only one of these)
8667 * flags: For future use.
8668 * xorigin: X coordinate of center of arc.
8669 * yorigin: Y coordinate of center of arc.
8670 * x1: X coordinate of first segment of arc.
8671 * y1: Y coordinate of first segment of arc.
8672 * x2: X coordinate of second segment of arc.
8673 * y2: Y coordinate of second segment of arc.
8674 */
8675 void API dw_draw_arc(HWND handle, HPIXMAP pixmap, int flags, int xorigin, int yorigin, int x1, int y1, int x2, int y2)
8676 {
8677 HPS hps;
8678 int thisheight;
8679 ARCPARAMS ap = { 1, 1, 0, 0 };
8680 POINTL pts[2];
8681 double r, a1, a2, a;
8682 int x3, y3;
8683
8684 if(handle)
8685 {
8686 hps = _set_colors(handle);
8687 thisheight = _get_height(handle);
8688 }
8689 else if(pixmap)
8690 {
8691 hps = _set_hps(pixmap->hps);
8692 thisheight = pixmap->height;
8693 }
8694 else
8695 return;
8696
8697 /* Setup the arc info on the presentation space */
8698 GpiSetArcParams(hps, &ap);
8699 pts[0].x = x1;
8700 pts[0].y = thisheight - y1 - 1;
8701 /* Move to the initial position */
8702 GpiMove(hps, pts);
8703 /* Calculate the midpoint */
8704 r = 0.5 * (hypot((double)(y1 - yorigin), (double)(x1 - xorigin)) +
8705 hypot((double)(y2 - yorigin), (double)(x2 - xorigin)));
8706 a1 = atan2((double)(y1 - yorigin), (double)(x1 - xorigin));
8707 a2 = atan2((double)(y2 - yorigin), (double)(x2 - xorigin));
8708 if(a2 < a1)
8709 a2 += M_PI * 2;
8710 a = (a1 + a2) / 2.;
8711 /* Prepare to draw */
8712 pts[0].x = (int)(xorigin + r * cos(a));
8713 pts[0].y = thisheight - (int)(yorigin + r * sin(a)) - 1;
8714 pts[1].x = x2;
8715 pts[1].y = thisheight - y2 - 1;
8716 /* Actually draw the arc */
8717 GpiPointArc(hps, pts);
8718
8719 if(!pixmap)
8720 WinReleasePS(hps);
8721 }
8722
8662 /* Call this after drawing to the screen to make sure 8723 /* Call this after drawing to the screen to make sure
8663 * anything you have drawn is visible. 8724 * anything you have drawn is visible.
8664 */ 8725 */
8665 void API dw_flush(void) 8726 void API dw_flush(void)
8666 { 8727 {