/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 without 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 * $FreeBSD$
 29 */
 30
 31#include <sys/types.h>
 32#include <sys/fbio.h>
 33#include <sys/kbio.h>
 34#include <sys/consio.h>
 35#include <vgl.h>
 36
 37int
 38main(int argc, char **argv)
 39{
 40  int y, xsize, ysize, i,j;
 41  VGLBitmap *tmp;
 42
 43  // set graphics mode, here 320x240 256 colors
 44  // supported modes are (from <sys/consio.h>):
 45  // SW_VGA_CG320:      std VGA 320x200 256 colors
 46  // SW_VGA_MODEX:      Modex VGA 320x240 256 colors
 47  // SW_VGA_VG640:      std VGA 640x480 16 colors
 48  VGLInit(SW_VGA_MODEX);
 49
 50  // initialize mouse and show pointer
 51  VGLMouseInit(VGL_MOUSESHOW);
 52
 53  // VGLDisplay is a ptr to a struct Bitmap defined and initialized by
 54  // libvgl. The Bitmap points directly to screen memory etc.
 55  xsize=VGLDisplay->Xsize;
 56  ysize=VGLDisplay->Ysize;
 57
 58  // alloc a new bitmap
 59  tmp = VGLBitmapCreate(MEMBUF, 256, 256, NULL);
 60  VGLBitmapAllocateBits(tmp);
 61  VGLClear(tmp, 0);
 62
 63  // fill the screen with colored lines
 64  for (y=0; y<ysize; y++)
 65    VGLLine(VGLDisplay, 0, y, xsize-1, y, y/2 % 256);
 66
 67  // draw some lines and circles just to show off
 68  VGLLine(VGLDisplay, 0, 0, xsize-1, ysize-1, 63);
 69  VGLLine(VGLDisplay, 0, ysize-1, xsize-1, 0, 63);
 70  VGLLine(VGLDisplay, 0, 0, 0, ysize-1, 63);
 71  VGLLine(VGLDisplay, xsize-1, 0, xsize-1, ysize-1, 63);
 72  VGLEllipse(VGLDisplay, 256, 0, 256, 256, 63);
 73  VGLEllipse(VGLDisplay, 0, 256, 256, 256, 0);
 74
 75  // some text is also useful
 76  VGLBitmapString(VGLDisplay, 100,100,
 77    "This is text", 63, 0, 0, VGL_DIR_RIGHT);
 78  sleep(2);
 79  VGLBitmapString(VGLDisplay, 100,100,
 80    "This is text", 63, 0, 0, VGL_DIR_UP);
 81  sleep(2);
 82  VGLBitmapString(VGLDisplay, 100,100,
 83    "This is text", 63, 0, 0, VGL_DIR_LEFT);
 84  sleep(2);
 85  VGLBitmapString(VGLDisplay, 100,100,
 86    "This is text", 63, 0, 0, VGL_DIR_DOWN);
 87  sleep(2);
 88
 89  // now show some simple bitblit
 90  for (i=0; i<256; i++)
 91    for (j=0; j<256; j++)
 92      tmp->Bitmap[i+256*j] = i%16;
 93  VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 0, 0, 128, 128);
 94  for (i=0; i<256; i++)
 95    for (j=0; j<256; j++)
 96      tmp->Bitmap[i+256*j] = j%16;
 97  VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 3, 128, 128, 128);
 98  sleep(2);
 99  VGLBitmapCopy(VGLDisplay, 237, 311, tmp, 64, 64, 128, 128);
100  VGLBitmapCopy(tmp, 32, 32, VGLDisplay, 400, 128, 128, 128);
101  sleep(2);
102  VGLBitmapCopy(VGLDisplay, 300, 300, VGLDisplay, 500, 128, 128, 128);
103  sleep(5);
104  i=0;
105
106  // loop around drawing and copying
107  while (++i) {
108    VGLBitmapCopy(VGLDisplay, rand()%xsize, rand()%ysize,
109                  VGLDisplay, rand()%xsize, rand()%ysize,
110                  rand()%xsize, rand()%ysize);
111    VGLLine(VGLDisplay,  rand()%xsize, rand()%ysize, 
112            rand()%xsize, rand()%ysize, rand()%256);
113    VGLEllipse(VGLDisplay, rand()%xsize, rand()%ysize,
114               rand()%xsize/2, rand()%ysize/2, rand()%256);
115    rand();
116    if (i > 1000) break;
117  }
118
119  // restore screen to its original mode
120  VGLEnd();
121  return 0;
122}