/* $Id: dosvga.c,v 1.8 1993/03/15 21:39:04 mjl Exp $ $Log: dosvga.c,v $ * Revision 1.8 1993/03/15 21:39:04 mjl * Changed all _clear/_page driver functions to the names _eop/_bop, to be * more representative of what's actually going on. * * Revision 1.7 1993/03/03 19:41:54 mjl * Changed PLSHORT -> short everywhere; now all device coordinates are expected * to fit into a 16 bit address space (reasonable, and good for performance). * * Revision 1.6 1993/02/27 04:46:31 mjl * Fixed errors in ordering of header file inclusion. "plplot.h" should * always be included first. * * Revision 1.5 1993/02/22 23:10:50 mjl * Eliminated the gradv() driver calls, as these were made obsolete by * recent changes to plmeta and plrender. Also eliminated page clear commands * from grtidy() -- plend now calls grclr() and grtidy() explicitly. * * Revision 1.4 1993/01/23 05:41:39 mjl * Changes to support new color model, polylines, and event handler support * (interactive devices only). * * Revision 1.3 1992/11/07 07:48:37 mjl * Fixed orientation operation in several files and standardized certain startup * operations. Fixed bugs in various drivers. * * Revision 1.2 1992/09/29 04:44:39 furnish * Massive clean up effort to remove support for garbage compilers (K&R). * * Revision 1.1 1992/05/20 21:32:32 furnish * Initial checkin of the whole PLPLOT project. * */ /* dosvga.c Geoffrey Furnish 5-1-91 This file constitutes the driver for a VGA display under DOS or OS/2 DOS mode. It is based on the xterm driver. UPDATE: 5-3-91 It became apparent during my initial day of development with this software that the structure of the Xterm driver was too pathetic for description in polite company. At this point I am performing a massive overhaul of the entire basic structure. Hoepfully the result will be usable. NOTE: This file is intended to be compiled with Microsoft C or QuickC. I use graphics functions from their library, and I use some MS language extensions (like //). The Geoffrey Furnish Standard Disclaimer: "I hate any C compiler that isn't ANSI compliant, and I refuse to waste my time trying to support such garbage. If you can't compile with an ANSI compiler, then don't expect this to work. No appologies, now or ever." */ #ifdef MSDOS /* Only compile for MSDOS */ #include "plplot.h" #include #include "drivers.h" #include #include /* Prototypes: This should only be compiled by DOS or OS/2 compilers, so I think we can safely forget about non-ANSI compilers raising their ugly heads here... */ static void pause(void); #define VGAX 639 #define VGAY 479 /* A flag to tell us whether we are in text or graphics mode */ #define TEXT_MODE 0 #define GRAPHICS_MODE 1 /* gmf; should probably query this on start up... Maybe later. */ static int mode = TEXT_MODE; #define CLEAN 0 #define DIRTY 1 static page_state; /* (dev) will get passed in eventually, so this looks weird right now */ static PLDev device; static PLDev *dev = &device; /*----------------------------------------------------------------------*\ * vga_init() * * Initialize device. \*----------------------------------------------------------------------*/ void vga_init(PLStream *pls) { pls->termin = 1; /* is an interactive terminal */ pls->icol0 = 1; pls->width = 1; pls->bytecnt = 0; pls->page = 0; pls->graphx = TEXT_MODE; if (!pls->colorset) pls->color = 1; /* Set up device parameters */ dev->xold = UNDEFINED; dev->yold = UNDEFINED; dev->xmin = 0; dev->xmax = VGAX; dev->ymin = 0; dev->ymax = VGAY; setpxl(2.5, 2.5); /* My best guess. Seems to work okay. */ setphy((PLINT) 0, (PLINT) VGAX, (PLINT) 0, (PLINT) VGAY); vga_graph(pls); } /*----------------------------------------------------------------------*\ * vga_line() * * Draw a line in the current color from (x1,y1) to (x2,y2). \*----------------------------------------------------------------------*/ void vga_line(PLStream *pls, short x1a, short y1a, short x2a, short y2a) { int x1 = x1a, y1 = y1a, x2 = x2a, y2 = y2a; if (pls->pscale) plSclPhy(pls, dev, &x1, &y1, &x2, &y2); y1 = VGAY - y1; y2 = VGAY - y2; _moveto(x1, y1); _lineto(x2, y2); page_state = DIRTY; } /*----------------------------------------------------------------------*\ * vga_polyline() * * Draw a polyline in the current color. \*----------------------------------------------------------------------*/ void vga_polyline(PLStream *pls, short *xa, short *ya, PLINT npts) { PLINT i; for (i = 0; i < npts - 1; i++) vga_line(pls, xa[i], ya[i], xa[i + 1], ya[i + 1]); } /*----------------------------------------------------------------------*\ * vga_eop() * * End of page. \*----------------------------------------------------------------------*/ void vga_eop(PLStream *pls) { if (page_state == DIRTY) pause(); _eopscreen(_GCLEARSCREEN); page_state = CLEAN; } /*----------------------------------------------------------------------*\ * vga_bop() * * Set up for the next page. * Advance to next family file if necessary (file output). \*----------------------------------------------------------------------*/ void vga_bop(PLStream *pls) { pls->page++; vga_eop(pls); } /*----------------------------------------------------------------------*\ * vga_tidy() * * Close graphics file or otherwise clean up. \*----------------------------------------------------------------------*/ void vga_tidy(PLStream *pls) { vga_text(pls); pls->page = 0; pls->OutFile = NULL; } /*----------------------------------------------------------------------*\ * vga_color() * * Set pen color. \*----------------------------------------------------------------------*/ void vga_color(PLStream *pls) { static long cmap[16] = { _WHITE, _RED, _LIGHTYELLOW, _GREEN, _CYAN, _WHITE, _WHITE, _GRAY, _WHITE, _BLUE, _GREEN, _CYAN, _RED, _MAGENTA, _LIGHTYELLOW, _WHITE }; if (pls->icol0 < 0 || pls->icol0 > 15) pls->icol0 = 15; _remappalette((short) pls->icol0, cmap[pls->icol0]); _setcolor((short) pls->icol0); } /*----------------------------------------------------------------------*\ * vga_text() * * Switch to text mode. \*----------------------------------------------------------------------*/ void vga_text(PLStream *pls) { if (pls->graphx == GRAPHICS_MODE) { if (page_state == DIRTY) pause(); _setvideomode(_DEFAULTMODE); pls->graphx = TEXT_MODE; } } /*----------------------------------------------------------------------*\ * vga_graph() * * Switch to graphics mode. \*----------------------------------------------------------------------*/ void vga_graph(PLStream *pls) { if (pls->graphx == TEXT_MODE) { if (!_setvideomode(_VRES16COLOR)) { printf("Unable to set graphics mode."); exit(0); } pls->graphx = GRAPHICS_MODE; page_state = CLEAN; } } /*----------------------------------------------------------------------*\ * vga_width() * * Set pen width. \*----------------------------------------------------------------------*/ void vga_width(PLStream *pls) { } /*----------------------------------------------------------------------*\ * vga_esc() * * Escape function. \*----------------------------------------------------------------------*/ void vga_esc(PLStream *pls, PLINT op, char *ptr) { } /*----------------------------------------------------------------------*\ * pause() * * Wait for a keystroke. \*----------------------------------------------------------------------*/ static void pause(void) { _settextposition(0, 0); _outtext("pause->"); while (!kbhit()); getch(); } #else int pldummy_dosvga() { return 0; } #endif /* MSDOS */