share/examples/libvgl/demo.c

   1 /*-
   2  * Copyright (c) 1991-1997 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software withough specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/share/examples/libvgl/demo.c,v 1.4 1999/12/14 08:47:42 billf Exp $
  29  * $DragonFly: src/share/examples/libvgl/demo.c,v 1.3 2007/08/19 11:39:11 swildner Exp $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <machine/console.h>
  34 #include <vgl.h>
  35
  36 int
  37 main(int argc, char **argv)
  38 {
  39   int y, xsize, ysize, i,j;
  40   VGLBitmap *tmp;
  41
  42   // set graphics mode, here 320x240 256 colors
  43   // supported modes are (from <sys/fbio.h>):
  44   // M_VGA_CG320:       std VGA 320x200 256 colors
  45   // M_VGA_MODEX:       Modex VGA 320x240 256 colors
  46   // M_VGA_CG640:       std VGA 640x480 16 colors
  47   VGLInit(M_VGA_MODEX);
  48
  49   // initialize mouse and show pointer
  50   VGLMouseInit(VGL_MOUSESHOW);
  51
  52   // VGLDisplay is a ptr to a struct Bitmap defined and initialized by
  53   // libvgl. The Bitmap points directly to screen memory etc.
  54   xsize=VGLDisplay->Xsize;
  55   ysize=VGLDisplay->Ysize;
  56
  57   // alloc a new bitmap
  58   tmp = VGLBitmapCreate(MEMBUF, 256, 256, NULL);
  59   VGLBitmapAllocateBits(tmp);
  60   VGLClear(tmp, 0);
  61
  62   // fill the screen with colored lines
  63   for (y=0; y<ysize; y++)
  64     VGLLine(VGLDisplay, 0, y, xsize-1, y, y/2 % 256);
  65
  66   // draw some lines and circles just to show off
  67   VGLLine(VGLDisplay, 0, 0, xsize-1, ysize-1, 63);
  68   VGLLine(VGLDisplay, 0, ysize-1, xsize-1, 0, 63);
  69   VGLLine(VGLDisplay, 0, 0, 0, ysize-1, 63);
  70   VGLLine(VGLDisplay, xsize-1, 0, xsize-1, ysize-1, 63);
  71   VGLEllipse(VGLDisplay, 256, 0, 256, 256, 63);
  72   VGLEllipse(VGLDisplay, 0, 256, 256, 256, 0);
  73
  74   // some text is also usefull
  75   VGLBitmapString(VGLDisplay, 100,100,
  76     "This is text", 63, 0, 0, VGL_DIR_RIGHT);
  77   sleep(2);
  78   VGLBitmapString(VGLDisplay, 100,100,
  79     "This is text", 63, 0, 0, VGL_DIR_UP);
  80   sleep(2);
  81   VGLBitmapString(VGLDisplay, 100,100,
  82     "This is text", 63, 0, 0, VGL_DIR_LEFT);
  83   sleep(2);
  84   VGLBitmapString(VGLDisplay, 100,100,
  85     "This is text", 63, 0, 0, VGL_DIR_DOWN);
  86   sleep(2);
  87
  88   // now show some simple bitblit
  89   for (i=0; i<256; i++)
  90     for (j=0; j<256; j++)
  91       tmp->Bitmap[i+256*j] = i%16;
  92   VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 0, 0, 128, 128);
  93   for (i=0; i<256; i++)
  94     for (j=0; j<256; j++)
  95       tmp->Bitmap[i+256*j] = j%16;
  96   VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 3, 128, 128, 128);
  97   sleep(2);
  98   VGLBitmapCopy(VGLDisplay, 237, 311, tmp, 64, 64, 128, 128);
  99   VGLBitmapCopy(tmp, 32, 32, VGLDisplay, 400, 128, 128, 128);
 100   sleep(2);
 101   VGLBitmapCopy(VGLDisplay, 300, 300, VGLDisplay, 500, 128, 128, 128);
 102   sleep(5);
 103   i=0;
 104
 105   // loop around drawing and copying
 106   while (++i) {
 107     VGLBitmapCopy(VGLDisplay, rand()%xsize, rand()%ysize,
 108                   VGLDisplay, rand()%xsize, rand()%ysize,
 109                   rand()%xsize, rand()%ysize);
 110     VGLLine(VGLDisplay,  rand()%xsize, rand()%ysize,
 111             rand()%xsize, rand()%ysize, rand()%256);
 112     VGLEllipse(VGLDisplay, rand()%xsize, rand()%ysize,
 113                rand()%xsize/2, rand()%ysize/2, rand()%256);
 114     rand();
 115     if (i > 1000) break;
 116   }
 117
 118   // restore screen to its original mode
 119   VGLEnd();
 120   return 0;
 121 }
 122